CN106836238B - Construction method and structure for replacing support of vertical rib plate of drop-type deep foundation pit - Google Patents
Construction method and structure for replacing support of vertical rib plate of drop-type deep foundation pit Download PDFInfo
- Publication number
- CN106836238B CN106836238B CN201710128055.4A CN201710128055A CN106836238B CN 106836238 B CN106836238 B CN 106836238B CN 201710128055 A CN201710128055 A CN 201710128055A CN 106836238 B CN106836238 B CN 106836238B
- Authority
- CN
- China
- Prior art keywords
- foundation pit
- vertical rib
- inner partition
- partition wall
- newly
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 238000010276 construction Methods 0.000 title claims abstract description 87
- 238000005192 partition Methods 0.000 claims abstract description 134
- 239000004567 concrete Substances 0.000 claims abstract description 53
- 238000000034 method Methods 0.000 claims abstract description 46
- 229910001294 Reinforcing steel Inorganic materials 0.000 claims abstract description 39
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 26
- 239000010959 steel Substances 0.000 claims abstract description 26
- 238000012423 maintenance Methods 0.000 claims description 48
- 238000009412 basement excavation Methods 0.000 claims description 28
- 239000010410 layer Substances 0.000 claims description 27
- 238000009415 formwork Methods 0.000 claims description 14
- 239000002985 plastic film Substances 0.000 claims description 12
- 229920006255 plastic film Polymers 0.000 claims description 12
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 12
- 238000004873 anchoring Methods 0.000 claims description 9
- 238000009434 installation Methods 0.000 claims description 7
- 230000002787 reinforcement Effects 0.000 claims description 7
- 239000003795 chemical substances by application Substances 0.000 claims description 6
- 239000011248 coating agent Substances 0.000 claims description 6
- 238000000576 coating method Methods 0.000 claims description 6
- 239000002023 wood Substances 0.000 claims description 6
- 238000005266 casting Methods 0.000 claims description 4
- 239000011241 protective layer Substances 0.000 claims description 3
- 239000000853 adhesive Substances 0.000 claims description 2
- 230000001070 adhesive effect Effects 0.000 claims description 2
- 230000000694 effects Effects 0.000 description 3
- 238000005056 compaction Methods 0.000 description 2
- DSSYKIVIOFKYAU-XCBNKYQSSA-N (R)-camphor Chemical compound C1C[C@@]2(C)C(=O)C[C@@H]1C2(C)C DSSYKIVIOFKYAU-XCBNKYQSSA-N 0.000 description 1
- 241000723346 Cinnamomum camphora Species 0.000 description 1
- 239000002390 adhesive tape Substances 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000009435 building construction Methods 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000011150 reinforced concrete Substances 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
Images
Classifications
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D17/00—Excavations; Bordering of excavations; Making embankments
- E02D17/02—Foundation pits
- E02D17/04—Bordering surfacing or stiffening the sides of foundation pits
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D2300/00—Materials
- E02D2300/0004—Synthetics
- E02D2300/0018—Cement used as binder
- E02D2300/002—Concrete
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A30/00—Adapting or protecting infrastructure or their operation
- Y02A30/60—Planning or developing urban green infrastructure
Landscapes
- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Paleontology (AREA)
- Civil Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Conveying And Assembling Of Building Elements In Situ (AREA)
- Foundations (AREA)
Abstract
The invention discloses a construction method for replacing supports of vertical rib plates of a drop-type deep foundation pit and a structure thereof, wherein the method comprises the steps of excavating earth of the foundation pit; constructing a support beam next to the bottom plate of the shallow foundation pit area in a hidden mode; paying off and positioning; binding the vertical rib plate and the inner partition wall steel bar at the elevation of the support beam surface to the upper support beam surface; newly adding support beams at two symmetrical angle supports at the upper support beam and binding the surrounding purlin beam reinforcing steel bars; mounting a vertical rib plate, an inner partition wall, a newly added support beam and a beam template for enclosing purlin from the bottom plate surface of the shallow foundation pit area to the level of the upper support beam surface; concrete pouring is carried out on the vertical rib plates, the inner partition walls, the newly-added support beams and the enclosing purlin beams; dismantling and maintaining the template; removing the support beam in the shallow foundation pit area; constructing the inner partition wall, the vertical rib plate and the enclosing purlin beam at the dismounting position of the supporting beam; and (5) dismantling the inner partition wall, the vertical rib plate and the structural beam slab column at the elevation position of the surface of the upper structural beam from the surface of the supporting beam. Under the premise of ensuring the safety of the whole foundation pit, the construction process of the foundation pit is not limited by the construction convention of first deep and then shallow, the construction progress of the whole project is accelerated, and the cost of the operation project of an enterprise is reduced.
Description
Technical Field
The invention belongs to the technical field of building construction, and particularly relates to a construction method and a structure for replacing supports of vertical rib plates of a stepped deep foundation pit.
Background
In order to utilize urban underground space to the maximum extent, the modern buildings are structurally designed into main buildings on the ground, the basement is an integral ultra-large and ultra-deep basement, the number of layers of basements in areas corresponding to different building units is inconsistent, and the basement is a stepped basement. In the construction process of the stepped basement, in order to ensure the relative independence of all buildings to the maximum extent and meet the requirements of the construction progress of all buildings, the construction condition that the basement structure of a shallow pit area is constructed before the basement structure of a deep foundation pit area is caused. How to guarantee that after the supporting beam in the shallow foundation pit area is removed, the safety and the integrity of the whole foundation pit supporting system become one of important contents in the process of digging the drop-type deep foundation pit.
Disclosure of Invention
Aiming at the problems in the prior art, the invention aims to provide a construction method for replacing supports of vertical rib plates of a drop-type deep foundation pit and a structure thereof.
The construction method for replacing the support of the vertical rib plate of the drop-type deep foundation pit is characterized by comprising the following steps of: excavating the earthwork of the foundation pit; constructing a support beam next to the bottom plate of the shallow foundation pit area in a hidden mode; paying off and positioning; binding a vertical rib plate and an inner partition wall reinforcing steel bar at the position of the support beam surface higher than the upper floor surface; newly adding support beams at two symmetrical angle supports at the upper support beam and binding the surrounding purlin beam reinforcing steel bars; mounting a vertical rib plate, an inner partition wall, a newly added support beam and a beam template for enclosing purlin from the bottom plate surface of the shallow foundation pit area to the level of the upper support beam surface; concrete pouring is carried out on the vertical rib plates, the inner partition walls, the newly-added support beams and the enclosing purlin beams; removing and maintaining the template; removing the support beam in the shallow foundation pit area; constructing the inner partition wall, the vertical rib plate and the enclosing purlin beam at the dismounting position of the supporting beam; and (5) dismantling the inner partition wall, the vertical rib plate and the structural beam slab column at the elevation position of the surface of the upper structural beam from the surface of the supporting beam.
The construction method for replacing the support of the vertical rib plate of the drop-type deep foundation pit is characterized by comprising the following specific steps of:
1) the foundation pit earthwork excavation adopts the construction principle of layered excavation, firstly supporting and then excavating, and large foundation pit and small excavation, when each layer of earthwork is excavated, the earthwork excavation of a shallow foundation pit region is firstly carried out, then the earthwork excavation of a deep foundation pit region is carried out, and an earth outlet is arranged in the deep foundation pit region;
2) construction of hidden beam of bottom plate and next supporting beam in shallow foundation pit area
The method comprises the following steps that earthwork excavation in a shallow foundation pit area is carried out until the basement base surface enters a basement structure construction stage, the excavation of the earthwork is continuously carried out in a deep foundation pit area, next supporting beam construction is carried out, when a shallow foundation pit bottom plate is constructed, foundation bottom plate construction in a T-shaped area is carried out firstly, then foundation bottom plate construction in an area other than the T-shaped area is carried out, the T-shaped area foundation bottom plate needs to be constructed together with the next supporting beam, a through long hidden beam is arranged in a bottom plate at the intersection position of the bottom plate in the shallow foundation pit area and the supporting beam in the shallow foundation pit area, and reinforcing steel bars of the supporting beam in the shallow foundation pit area are anchored into the hidden beam;
3) paying-off positioning
After concrete pouring of the basement bottom plate is completed, according to a drawing of enclosure design, placing a concrete vertical rib plate, an inner partition wall axis and a side line at the corresponding position of the basement bottom plate in the shallow basement area, and placing a newly-added support beam, a purlin surrounding beam axis and a side line at a support position corresponding to the basement bottom plate in the deep foundation pit area;
4) binding of bottom plate surface to upper supporting beam surface elevation vertical rib plate and inner partition wall steel bar
Binding vertical rib plates and reinforcing steel bars of the inner partition wall after the paying-off and positioning are finished, wherein the binding height of the horizontal reinforcing steel bars is increased from the bottom plate surface to the upper supporting beam surface, the horizontal distribution ribs of the vertical rib plates are arranged on the outer sides of the vertical reinforcing steel bars and anchored in the inner partition wall, 3 phi 18 anchoring steel bars connected with the inner partition wall are arranged at the end parts of the vertical rib plates, and the anchoring steel bars are anchored in the inner partition wall after being bent at the upper supporting beam surface;
5) newly-added supporting beam and enclosing purlin beam reinforcement at two symmetrical angle braces at upper supporting beam
The newly added supporting beam, the newly added surrounding purlin beam and the original supporting beam concrete are connected in a bar planting mode, reinforcing steel bars of the newly added supporting beam and the newly added surrounding purlin beam are bound with reinforcing steel bars of the vertical rib plates and the inner partition wall together to form a unified whole, main reinforcing steel bars of the newly added supporting beam are bent and anchored in the inner partition wall, and the newly added surrounding purlin beam and the inner partition wall are connected by additionally arranging two rows of phi 16@300 bent anchor reinforcing steel bars in the length direction of the surrounding purlin beam of the inner partition wall;
6) vertical rib plates, inner partition walls, newly added supporting beams and purlin enclosing beam template installation from bottom plate surface of shallow foundation pit area to upper supporting beam surface elevation position
The vertical rib plates, the inner partition walls, the newly added supporting beams and the newly added formworks for enclosing the purlin beams are installed by adopting wood formers and steel pipe supports, and the horizontal spacing between the vertical rib plates and the screws of the inner partition walls is less than or equal to 500mm, and the vertical spacing is less than or equal to 450 mm;
7) concrete pouring of vertical rib plates, inner partition walls, newly-added supporting beams and newly-added surrounding purlin beams
Before concrete is poured, double-faced adhesive is used for adhering joints of the wood templates, and a vibrating rod with the diameter of 3CM is adopted to ensure that the vibration is compact at the position where the steel bar meshes are dense at the intersection positions of the vertical rib plates, the inner partition walls and the newly-added enclosing purlin beams;
8) form dismantling and maintenance
The method comprises the following steps that a vertical rib plate, an inner partition wall, a newly increased supporting beam and a newly increased surrounding purlin beam side formwork are disassembled when the concrete strength reaches 1.2MPa, and the newly increased supporting beam and the newly increased surrounding purlin beam bottom formwork are disassembled after the concrete strength reaches 80%; the side mould is maintained in time after being dismantled so as to reduce the phenomena of shrinkage cracks and the like on the surface of the concrete;
9) shallow foundation pit area support beam dismantling method
After the concrete strength of the vertical rib plate, the inner partition wall, the newly added supporting beam and the newly added surrounding purlin beam reaches 80% of the design strength, the supporting beam in the shallow foundation pit area is removed, manual chiseling is adopted in the removing process of the supporting beam in the shallow foundation pit area, and a main rib of the supporting beam is reserved in the removing process of the supporting beam at the position corresponding to the inner partition wall, so that the part is better connected with the newly poured vertical rib plate, the inner partition wall and the newly added surrounding purlin beam;
10) construction of partition wall, vertical rib plate and purlin beam in position for dismantling supporting beam
After the supporting beam in the shallow foundation pit area is removed and cleaned, vertical rib plates, inner partition walls, newly-added beam reinforcement binding of enclosing purlins, template installation and concrete pouring are carried out in a main reinforcement area of the supporting beam reserved after the supporting beam in the shallow foundation pit area is removed, and when the concrete is poured, high-elevation micro-expansion concrete is adopted for pouring and is vibrated to be compact;
11) construction of inner partition wall, vertical rib plate and structural beam slab column at position of elevation of upper structural beam surface from support beam surface
After the construction of the inner partition wall, the vertical rib plate and the newly-added purlin surrounding beam at the removing position of the supporting beam in the shallow foundation pit area is completed, the construction of the inner partition wall, the vertical rib plate, the upper structural beam plate and the wall plate of the structural column at the level of the beam surface of the original supporting beam to the upper structural beam surface is carried out, the inner partition wall and the vertical rib plate are bound and supported together with the structural column, the horizontal distribution ribs of the vertical rib plate are arranged on the outer side of the vertical reinforcing steel bars of the rib plate and anchored in the inner partition wall, and when the position of the vertical rib plate is coincided with the horizontal projection position of the structural beam and the width is the same, the large value and the small value of the horizontal distribution ribs of the vertical rib plate and the waist ribs of the structural beam are taken as the waist ribs of the structural beam in the height range; when the position of the vertical rib plate is partially overlapped with the horizontal projection position of the structural beam, the vertical and horizontal steel bars of the vertical rib plate are avoided from the main steel bar of the structural beam.
3. The construction method for replacing the support of the vertical rib plate of the drop-type deep foundation pit as claimed in claim 2, wherein the earthwork excavation of the first layer to the fourth layer in the shallow foundation pit region and the deep foundation pit region in the step 1) adopts a ramp to remove the earthwork, and the earthwork of the fifth layer and the sixth layer in the deep foundation pit region adopts a tire type grab bucket machine to grab the earthwork on the trestle and load the earthwork for outward transportation.
The construction method for replacing the support of the vertical rib plate of the drop-type deep foundation pit is characterized in that the width of the hidden beam in the step 2) is the same as that of the underground continuous wall arranged at the intersection of the deep and shallow foundation pits, and the height of the hidden beam extends from the top surface of the bottom plate of the shallow foundation pit area to the bottom surface of the next supporting beam.
The construction method for replacing the support of the vertical rib plate of the drop-type deep foundation pit is characterized in that the length of the bent anchor steel bar in the step 5) is the sum of the thickness of the inner partition wall and the width of the newly-added enclosing purlin beam minus the thickness of the concrete protective layers on the two sides.
The construction method for replacing the support of the vertical rib plate of the drop-type deep foundation pit is characterized in that a method of covering a plastic film or a maintenance blanket and combining watering maintenance is adopted for maintenance in the step 8), water is frequently sprayed before form removal and in the maintenance process to keep the vertical rib plate moist, and the maintenance time is not less than 7 d; if the water can not be sprayed for maintenance in winter, a maintenance method combining coating maintenance agent and plastic film is adopted, and the maintenance time is not less than 14 days.
The construction method for replacing the support of the vertical rib plate of the drop-type deep foundation pit is characterized in that concrete is poured together with the inner partition wall and the vertical rib plate in the step 11) and the structural beam slab column, and a vibrating rod with the diameter of 3CM is adopted in the concrete pouring process to ensure that the vibration is compact. After concrete pouring is finished, removing the formwork of the vertical rib plates and the side formwork of the inner partition wall when the strength reaches 1.2MPa, covering a plastic film or a maintenance blanket after the side formwork is removed, and combining watering maintenance, wherein water is frequently sprayed before removing the formwork and in the maintenance process to keep the formwork moist, and the maintenance time is not less than 7 d; if the water can not be sprayed for maintenance in winter, a maintenance method combining coating maintenance agent and plastic film is adopted, and the maintenance time is not less than 14 days.
The support structure is characterized by comprising vertical rib plates, inner partition walls, newly-added supporting beams and newly-added surrounding purlin beams, wherein the inner partition walls are arranged between the shallow foundation pit region and the deep foundation pit region, the vertical rib plates are arranged in the shallow foundation pit region, the newly-added supporting beams and the newly-added surrounding purlin beams are arranged in the deep foundation pit region, the bottoms of the vertical rib plates are located on a bottom plate, the side faces of the vertical rib plates are close to one side of an inner partition wall, the newly-added surrounding purlin beams are located on the other side of the inner partition wall and opposite to the vertical rib plates, and the newly-added supporting beams are located between the original supporting beams and the newly-added surrounding purlin beams.
A formula deep basal pit vertical floor of falling grade trade props structure, its characterized in that increases a supporting beam for right triangle structure newly, two right-angle sides respectively hug closely and enclose the purlin roof beam with newly-increased closely by former supporting beam.
The drop-type deep foundation pit vertical rib plate support replacing structure is characterized in that the end of an inner partition wall is connected with a main rib area of a supporting beam.
By adopting the technology, compared with the prior art, the invention has the following beneficial effects:
1) the shallow foundation pit bottom plate is constructed in a subarea mode, firstly, the foundation bottom plate construction of a T-shaped area is carried out, then, the foundation bottom plate construction of an area other than the T-shaped area is carried out, the foundation bottom plate of the T-shaped area needs to be constructed together with a next supporting beam, and when the T-shaped bottom plate and the next supporting beam are constructed, a through-length hidden beam is arranged in the bottom plate at the intersection position of the shallow foundation pit bottom plate and the supporting beam, so that the effect of the supporting beam and the shallow foundation pit bottom plate when stressed together is ensured;
2) the foundation pit supporting structure is optimized, a support replacing component is additionally arranged at a supporting beam at the intersection position of a deep foundation pit and a shallow foundation pit, the support replacing component mainly comprises the steps that the supporting beam and a purlin enclosing beam are additionally arranged at the intersection position of an original angle support obtuse angle and a structural inner partition wall, a plurality of vertical rib plates are arranged at the position, corresponding to the purlin enclosing beam, of the inner partition wall, the supporting beam, the purlin enclosing beam and the vertical rib plates are additionally arranged at the symmetrical angle support position of the supporting beam surface on a foundation bottom plate, and after the supporting beam in the shallow foundation pit area is dismounted, a new support enclosing supporting system composed of the structural beam plates and the horizontal supporting beam is formed through the vertical rib plates, the concrete inner partition wall, the newly added supporting beam, the purlin enclosing beam and the lower-layer structural beam plate in the shallow foundation pit area, so that the relative independence of all building in the falling-level type basement construction process is improved, and the construction progress requirement of all buildings is met;
3) according to the invention, by adopting the drop-type deep foundation pit vertical rib plate support changing construction method, under the precondition of ensuring the safety of the whole foundation pit, the basement beam plate structure in the shallow foundation pit area can be constructed before the basement beam plate structure in the deep foundation pit area, and the construction process of the whole project is accelerated without being restricted to the construction convention of deep first and shallow second in the foundation pit construction process, so that the cost of the operation project of an enterprise is reduced;
4) the construction method can effectively improve the engineering construction progress, ensure the safety in the foundation pit construction process, accord with the current green construction concept, improve the social image of construction enterprises and establish the benchmarks with high engineering quality standard;
5) according to the support changing construction method for the vertical rib plates of the drop-type deep foundation pit, only a plurality of vertical rib plates, supporting beams and purlin surrounding beams are added at the supporting angles on the support supporting system, so that the effect of firstly constructing the main structure of the shallow foundation pit area on the premise of ensuring the safety of the foundation pit is achieved, a new thought and a new method for the drop-type deep foundation pit construction are provided, and the drop-type deep foundation pit construction method is particularly suitable for the construction of the drop-type deep foundation pit with the upper main structure of a multi-building.
Drawings
FIG. 1 is a schematic view of the installation of the hidden beam according to the present invention;
FIG. 2 is a schematic structural view of the newly added vertical rib plate, the support beam and the surrounding purlin beam;
FIG. 3 is a schematic view of the structure of the vertical rib plate and the inner partition anchoring steel bar of the upper supporting beam surface of the bottom plate surface of the present invention;
FIG. 4 is a schematic structural diagram of a supporting system for the intersection position of deep and shallow foundation pits according to the present invention;
FIG. 5 is an enlarged schematic view of a connecting steel structure of the newly added purlin beam and the inner partition wall;
FIG. 6 is a schematic sectional view of a construction area of a structural beam slab column, a vertical rib plate and an inner partition wall.
In the figure: 1-bottom plate, 2-shallow foundation pit area supporting beam, 3-hidden beam, 4-vertical ribbed plate, 5-inner partition wall, 6-vertical reinforcing steel bar, 7-anchoring reinforcing steel bar, 8-upper supporting beam, 9-newly-added supporting beam, 10-newly-added enclosing purlin beam, 11-bent anchoring reinforcing steel bar, 12-supporting beam main reinforcing steel bar area, 13-original supporting beam, 14-underground continuous wall, 15-structural beam, A-shallow foundation pit area and B-deep foundation pit area.
Detailed Description
The invention will be further described with reference to the accompanying drawings, without limiting the scope of the invention thereto:
the working principle of the invention is that after the construction of the lower layer structure of the shallow foundation pit is completed, a newly-added supporting beam and a newly-added surrounding purlin beam are firstly constructed at two symmetrical angle braces of a supporting beam surface from the lower layer structure surface to the upper part of the structure surface, and a reinforced concrete vertical rib plate and a concrete structure internal partition wall within the range of the newly-added supporting beam and the newly-added surrounding purlin beam, and after the newly-added supporting beam, the surrounding purlin beam, the vertical rib plate and the concrete structure internal partition wall reach 80% of the design strength, the supporting beam in the shallow foundation pit area is dismantled; after the support is disassembled, the concrete inner partition wall, the vertical rib plate and the surrounding purlin beam which correspond to the horizontal projection range of the concrete inner partition wall are poured, and a new structure beam plate horizontal support replacing structure is formed by the vertical rib plate, the concrete inner partition wall, the newly added supporting beam, the surrounding purlin beam and the lower layer structure beam plate of the shallow foundation pit, so that the basement structure construction of the whole foundation pit in the shallow foundation pit area is guaranteed, and the safety of the whole foundation pit in the earth excavation process is guaranteed in the deep foundation pit area.
The invention discloses a falling-type deep foundation pit vertical rib plate support replacing structure which is arranged between a shallow foundation pit area A and a deep foundation pit area B and comprises a vertical rib plate 4, an inner partition wall 5, a newly-added supporting beam 9 and a newly-added surrounding purlin beam 10, wherein the inner partition wall 5 is arranged between the shallow foundation pit area A and the deep foundation pit area B, the vertical rib plate 4 is arranged in the shallow foundation pit area A, the newly-added supporting beam 9 and the newly-added surrounding purlin beam 10 are arranged in the deep foundation pit area B, the bottom of the vertical rib plate 4 is positioned on a bottom plate 1, the side face of the vertical rib plate is abutted against one side of the inner partition wall 5, the newly-added surrounding purlin beam 10 is positioned on the other side of the inner partition wall 5 and is opposite to the vertical rib plate 4, and the newly-added supporting beam 9 is positioned between an original supporting beam 13 and the newly-added surrounding purlin beam 10.
The vertical rib plate support replacing structure of the drop-type deep foundation pit is characterized in that a support beam 9 is additionally arranged and is of a right-angled triangle structure, and two right-angled edges are respectively abutted to an original support beam 13 and an additionally arranged surrounding purlin beam 10.
The vertical rib plate support replacing structure of the drop-type deep foundation pit is characterized in that the end of the inner partition wall 5 is connected with a main rib area 12 of a support beam.
As shown in fig. 1 to 6, the construction process of the construction method for replacing the support of the vertical rib plate of the drop-type deep foundation pit of the invention comprises the following steps: excavating the earthwork of the foundation pit; constructing a support beam next to the bottom plate of the shallow foundation pit area in a hidden mode; paying off and positioning; binding the vertical rib plate and the inner partition wall steel bar at the elevation of the support beam surface to the upper support beam surface; newly adding support beams at two symmetrical angle supports at the upper support beam and binding the surrounding purlin beam reinforcing steel bars; mounting a vertical rib plate, an inner partition wall, a newly added support beam and a beam template for enclosing purlin from the bottom plate surface of the shallow foundation pit area to the level of the upper support beam surface; concrete pouring is carried out on the vertical rib plates, the inner partition walls, the newly-added support beams and the enclosing purlin beams; removing and maintaining the template; removing the support beam in the shallow foundation pit area; constructing the inner partition wall, the vertical rib plate and the enclosing purlin beam at the dismounting position of the supporting beam; dismantling the construction of the inner partition wall, the vertical rib plate and the structural beam slab column at the elevation position of the surface of the upper structural beam, and specifically comprising the following steps:
1) excavation of foundation pit earthwork
The earthwork excavation strictly complies with the layered excavation, firstly supports and then excavates a large foundation pit, and adopts the construction principle of small excavation, an earth outlet is arranged in a deep foundation pit region B, when each layer of earthwork excavation is carried out, the earthwork excavation of a shallow foundation pit region A is carried out firstly, and then the earthwork excavation of the deep foundation pit region B is carried out, the earthwork excavation of the first layer to the fourth layer of the deep and shallow foundation pit adopts the conventional ramp to carry out the earth excavation, and the earthwork of the fifth layer and the sixth layer of the deep foundation pit region adopts a tire type grab bucket machine to grab and load the earth on a trestle for outward transportation;
2) construction of hidden beam of bottom plate and next supporting beam in shallow foundation pit area
In order to accelerate the whole construction progress of the foundation pit, the construction of a foundation slab of a T-shaped area is firstly carried out when a bottom slab 1 of the shallow foundation pit area A is constructed, then the construction of a foundation slab of an area other than the T-shaped area is carried out, the foundation slab of the T-shaped area needs to be constructed together with a next supporting beam, in order to ensure the effect when the supporting beam of the shallow foundation pit area and the bottom slab 1 of the shallow foundation pit area are stressed together, a through-length hidden beam 2 is arranged in the bottom slab at the intersection position of the bottom slab 1 and the supporting beam 2 of the shallow foundation pit area, an underground continuous wall 14 is arranged at the intersection position of the width of the hidden beam 2 and the deep foundation pit A, the height is from the top surface of the bottom slab 1 to the bottom surface of the supporting beam 2 of the next shallow foundation pit area, and reinforcing steel bars of the supporting beam 2 of the shallow foundation pit area are anchored into the hidden beam 3, as shown in fig. 1;
3) paying-off positioning
After concrete pouring of the bottom plate 1 of the shallow foundation pit area A is completed, according to an enclosure design drawing, placing concrete vertical rib plates, inner partition wall axes and side lines at corresponding positions of the basement bottom plate of the shallow foundation pit area A, and placing axes and side lines of a newly-increased supporting beam 9 and a newly-increased enclosing purlin beam 10 at a supporting position of the deep foundation pit area B corresponding to the basement bottom plate, as shown in FIG. 2;
4) binding of bottom plate surface to upper supporting beam surface elevation vertical rib plate and inner partition wall steel bar
After the paying-off and positioning are finished, reinforcing steel bars of a vertical ribbed plate 4 and an inner partition wall 5 are bound, the binding height of a horizontal reinforcing steel bar is increased from the surface of a bottom plate 1 to the surface of a previous supporting beam, the horizontally distributed reinforcing steel bars of the vertical ribbed plate 4 are arranged at the outer sides of vertical reinforcing steel bars 6 and are anchored in the inner partition wall 5, an anchoring reinforcing steel bar 7 with the diameter of 3 phi 18 connected with the inner partition wall is arranged at the end part of the vertical ribbed plate 4, and the anchoring reinforcing steel bar 7 is anchored in the inner partition wall 5 after being bent at the surface of an upper supporting beam 8, as shown in fig. 3;
5) newly-added supporting beam and enclosing purlin beam reinforcement at two symmetrical angle braces at upper supporting beam
As shown in fig. 4, the newly added supporting beam 9, the newly added surrounding purlin beam 10 and the original supporting beam 13 are connected by using a bar planting method, and the reinforcing steel bars of the newly added supporting beam 9 and the newly added surrounding purlin beam 10 are bound with the vertical rib plate 4 and the reinforcing steel bars of the inner partition wall 5 together to be connected into a unified whole;
a main rib of a newly added supporting beam 9 is fixed in the inner partition wall 5 in a bending anchor mode, the newly added surrounding purlin beam 10 and the inner partition wall 5 are connected by additionally arranging an upper row and a lower row of bent anchor steel bars 11 of phi 16@300 in the length direction of the newly added surrounding purlin beam 10 along the inner partition wall 5, and the length of each bent anchor steel bar 11 is equal to the sum of the wall thickness of the inner partition wall 5 and the width of the newly added surrounding purlin beam 10 minus concrete protective layers on two sides.
6) Vertical rib plate, inner partition wall, newly added supporting beam and enclosing purlin beam formwork installation from bottom plate surface of shallow foundation pit region to elevation position of upper supporting beam surface
When the templates of the vertical ribbed plates 4, the inner partition walls 5, the newly added supporting beams 9 and the newly added surrounding purlin beams 10 are installed, wood molds and steel pipe supports are adopted, and the horizontal spacing between the screws of the vertical ribbed plates 4 and the inner partition walls 5 is less than or equal to 500mm, and the vertical spacing is less than or equal to 450 mm;
7) concrete pouring of vertical rib plates, inner partition walls, newly-added supporting beams and surrounding purlin beams
Before concrete is poured, wood formwork joints are adhered by double faced adhesive tape, reinforcing meshes are dense at the intersecting positions of the vertical rib plates 4, the inner partition walls 5 and the newly-added surrounding purlin beams 10, gaps are narrow, a common vibrating rod cannot meet the requirement of vibration compaction, and the vibrating rod with the diameter of 3CM is adopted to ensure the vibration compaction.
8) Form dismantling and maintenance
The method mainly comprises the steps that a method of covering a plastic film or a curing blanket and combining watering curing is adopted during curing during construction, water is frequently sprayed before the die is removed and the curing process is kept wet, and the curing time is not less than 7 d; if the construction in winter period can not be maintained by sprinkling water, a maintenance method combining a coating maintenance agent and a plastic film is adopted, and the maintenance time is not less than 14 days;
9) shallow foundation pit area support beam dismantling method
After the concrete strength of the vertical rib plate 4, the inner partition wall 5, the newly added supporting beam 9 and the newly added surrounding purlin beam 10 reaches 80% of the design strength, the supporting beam 2 in the shallow foundation pit area can be removed, manual chiseling must be adopted in the process of removing the supporting beam 2 in the shallow foundation pit area, the disturbance of chiseling on the undetached support is reduced as much as possible, the concrete at the undetached support is prevented from loosening and cracking, and the main reinforcement of the supporting beam is reserved in the process of removing the support at the position corresponding to the inner partition wall 5, so that the part is better connected with the newly poured vertical rib plate 4, the inner partition wall 5 and the newly added surrounding purlin beam 10;
after a supporting beam in the same layer of horizontal supporting shallow foundation pit area is removed, the structural stress system of the original supporting system is changed, and a new horizontal support changing structure is mainly formed by the vertical rib plates 4, the inner partition walls 5, the newly added supporting beams 9, the newly added surrounding purlin beams 10, the bottom plate 1 of the lower-layer structural beam of the shallow foundation pit area A and the original supporting beam 13 in the area which is not removed in the deep foundation pit area B together to bear the horizontal force of the original supporting system.
10) Construction of partition wall, vertical rib plate and purlin beam in position for dismantling supporting beam
After the shallow foundation pit area supporting beam 2 is removed and cleaned, a supporting beam main rib area 12 is reserved after the shallow foundation pit area supporting beam 2 is removed, and vertical rib plates 4, inner partition walls 5, steel bar binding of a newly-added surrounding purlin beam 10, template installation and concrete pouring are carried out, wherein high-elevation micro-expansion concrete is adopted for pouring when the concrete in the area is poured, and the area is compacted through vibration, as shown in fig. 5;
11) construction of inner partition wall, vertical rib plate and structural beam slab column at position of elevation of upper structural beam surface from support beam surface
After the construction of removing the inner partition wall 5, the vertical rib plate 4 and the newly added purlin beam 10 at the position of the support beam 2 in the shallow foundation pit area is completed, the construction of the inner partition wall 5, the vertical rib plate 4, the upper structural beam plate and the column wall plate of the structure is carried out from the support beam surface to the height mark position of the upper structural beam surface,
binding and formwork supporting are carried out on the inner partition wall 5 and the vertical rib plate 4 together with the structural column, horizontally distributed ribs of the vertical rib plate 4 are arranged on the outer side of vertical reinforcing steel bars 6 of the rib plate and anchored in the inner partition wall 5, and when the position of the vertical rib plate 4 and the horizontal projection position of the structural beam are overlapped and have the same width, the large value and the small value of the horizontally distributed ribs of the vertical rib plate 4 and the waist rib of the structural beam are taken as waist ribs in the height range of the structural beam; when the position of the vertical rib plate 4 is partially overlapped with the horizontal projection position of the structural beam 15, the vertical and horizontal steel bars of the vertical rib plate 4 are avoided from the main steel bar of the structural beam, as shown in fig. 6;
the inner partition wall 5 and the vertical rib plate 4 are cast with the structural beam slab column together, a vibrating rod with the diameter of 3CM is adopted in the concrete casting process to ensure that the vibration is compact, the vertical rib plate 4 and the side mold of the inner partition wall 5 are demolded when the strength reaches 1.2MPa after the concrete casting is finished, a method of covering a plastic film or a maintenance blanket and combining watering maintenance is adopted after the side mold is demolished, water should be frequently sprinkled before demolishing the mold and in the maintenance process to keep moist, and the maintenance time is not less than 7 d; if the water can not be sprayed for maintenance in winter, a maintenance method combining coating maintenance agent and plastic film is adopted, and the maintenance time is not less than 14 days.
According to the invention, through popularization and implementation of the support-replacing construction method for the vertical rib plates of the drop-type deep foundation pit in the engineering construction process, under the premise of ensuring the safety of the whole foundation pit, the basement beam plate structure in the shallow foundation pit region can be constructed before the basement beam plate structure in the deep foundation pit region, and the construction progress of the whole engineering can be accelerated without being constrained by the deep-first and shallow-second construction practice in the foundation pit construction process, so that the cost of operation engineering of an enterprise is reduced.
Example 1 money Jiangxiang New City No. D09 plot finance center project-China Industrial and commercial Bank
The central project of the money river New City No. D09 plot finance, China Industrial and commercial Bank, is located in Hangzhou city, the New Yongqiangjiang City, east China theater road, south China road, West bridge road, and north China road. The total building area is 291862 square meters, the number of underground layers is 3-5, the excavation depth of the foundation pit is 17-24 m, the height difference of the deep and shallow foundation pits reaches 6m, and five support beams are arranged. In the foundation pit construction process, vertical rib plates, supporting beams and purlin enclosing beams are additionally arranged at two symmetrical angle brace positions at the joint of a third supporting beam and a first supporting beam deep and shallow foundation pit, so that the safety of the whole foundation pit is ensured in the advanced construction process of a main structure of a shallow foundation pit area.
Example 2 Zhejiang national trade commercial finance headquarters project
The Zhejiang country trade business finance headquarters project is located in Hangzhou city, Qianjiang city, New City, south-east direction, Cinnamomum camphora road on the northeast side, New pond river and Fuchun road on the northwest side, Qianjiang New City forest park on the southwest side, and planned forest road on the southeast side, and belongs to the core plot of Qianjiang New City. The total building area is 112164 square meters, 37 layers above the ground and 4-5 layers below the ground, the excavation depth of the foundation pit is 24-31 m, the height difference of the deep and shallow foundation pits reaches 7m, and 5 support beams are arranged. In the foundation pit construction process, add vertical floor, a supporting beam and enclose purlin roof beam in a supporting beam department, guaranteed shallow foundation pit regional major structure in the work progress in advance, the safety of whole foundation pit.
Claims (9)
1. A construction method for replacing supports of vertical rib plates of a drop-type deep foundation pit comprises the following steps: excavating the earthwork of the foundation pit; constructing a bottom plate hidden beam and a next supporting beam in the shallow foundation pit area; paying off and positioning; binding a vertical rib plate and an inner partition wall reinforcing steel bar at the position of the support beam surface higher than the upper floor surface; newly adding support beams at two symmetrical angle supports at the upper support beam and binding the surrounding purlin beam reinforcing steel bars; mounting a vertical rib plate, an inner partition wall, a newly added support beam and a beam template for enclosing purlin from the bottom plate surface of the shallow foundation pit area to the level of the upper support beam surface; concrete pouring is carried out on the vertical rib plates, the inner partition walls, the newly-added support beams and the enclosing purlin beams; removing and maintaining the template; removing the support beam in the shallow foundation pit area; constructing the inner partition wall, the vertical rib plate and the enclosing purlin beam at the dismounting position of the supporting beam; dismantling the construction of the inner partition wall, the vertical rib plate and the structural beam slab column at the elevation of the surface of the upper structural beam, and is characterized by comprising the following specific steps:
1) the foundation pit earthwork excavation adopts the construction principle of layered excavation, firstly supporting and then excavating, and large foundation pit and small excavation, when each layer of earthwork is excavated, the earthwork excavation of a shallow foundation pit region is firstly carried out, then the earthwork excavation of a deep foundation pit region is carried out, and an earth outlet is arranged in the deep foundation pit region;
2) construction of hidden beam of bottom plate and next supporting beam in shallow foundation pit area
The method comprises the following steps that earthwork excavation in a shallow foundation pit area is carried out until the basement base surface enters a basement structure construction stage, the excavation of the earthwork is continuously carried out in a deep foundation pit area, next supporting beam construction is carried out, when the foundation plate of the shallow foundation pit is constructed, foundation plate construction in a T-shaped area is carried out firstly, then foundation plate construction in an area other than the T-shaped area is carried out, the foundation plate of the T-shaped area needs to be constructed together with the next supporting beam, a through long hidden beam (3) is arranged in the bottom plate at the intersection position of a bottom plate (1) in the shallow foundation pit area and a supporting beam (2) in the shallow foundation pit area, and reinforcing steel bars of the supporting beam (2) in the shallow foundation pit area are anchored into the hidden beam (3);
3) paying-off positioning
After concrete pouring of the bottom plate of the shallow foundation pit is finished, according to a drawing of enclosure design, placing a concrete vertical rib plate, an axis and a side line of an inner partition wall at the corresponding position of the bottom plate of the basement in the region of the shallow foundation pit, and placing a newly-increased supporting beam, an axis and a side line of a surrounding purlin beam at a supporting position corresponding to the upper part of the bottom plate of the basement in the region of the deep foundation pit;
4) binding of bottom plate surface to upper supporting beam surface elevation vertical rib plate and inner partition wall steel bar
After the paying-off and positioning are finished, reinforcing steel bars of a vertical rib plate (4) and an inner partition wall (5) are bound, the binding height of the horizontal reinforcing steel bars is increased from a bottom plate surface to the top of a supporting beam surface, horizontal distribution ribs of the vertical rib plate (4) are arranged on the outer side of the vertical reinforcing steel bars (6), the horizontal distribution ribs are anchored in the inner partition wall, 3 phi 18 anchoring steel bars (7) connected with the inner partition wall are arranged at the end part of the vertical rib plate, and the anchoring steel bars (7) are anchored in the inner partition wall (5) after being bent at the beam surface of an upper supporting beam (8);
5) newly-added supporting beam and enclosing purlin beam reinforcement at two symmetrical angle braces at upper supporting beam
The newly added supporting beam (9), the newly added surrounding purlin beam (10) and the original supporting beam (13) are connected in a bar planting mode, reinforcing steel bars of the newly added supporting beam (9) and the newly added surrounding purlin beam (10) are bound with reinforcing steel bars of the vertical rib plates (4) and the inner partition wall (5) together to form a unified whole, main reinforcing steel bars of the newly added supporting beam (9) are bent and anchored in the inner partition wall (5), and the newly added surrounding purlin beam (10) and the inner partition wall (5) are connected by additionally arranging two rows of phi 16@300 bent anchor reinforcing steel bars (11) in the length direction of the surrounding purlin beam extending through the inner partition wall (5);
6) vertical rib plates, inner partition walls, newly added supporting beams and purlin enclosing beam template installation from bottom plate surface of shallow foundation pit area to upper supporting beam surface elevation position
The templates of the vertical rib plates (4), the inner partition walls (5), the newly added supporting beams (9) and the newly added surrounding purlin beams (10) are installed by adopting wood formwork and steel pipe supports, and the horizontal spacing between the screws of the vertical rib plates (4) and the inner partition walls (5) is less than or equal to 500mm, and the vertical spacing is less than or equal to 450 mm;
7) concrete pouring is carried out on the vertical rib plates (4), the inner partition walls (5), the newly added supporting beams (9) and the newly added surrounding purlin beams (10)
Before concrete is poured, double-faced adhesive is used for pasting joints of the wood templates, and a vibrating rod with the diameter of 3CM is adopted to ensure that the vibration is compact at the position where the vertical rib plates (4), the inner partition wall (5) and the newly-added enclosing purlin beam (10) are intersected and where the reinforcing steel bar meshes are dense;
8) form dismantling and maintenance
The vertical rib plates (4), the inner partition walls (5), the newly added supporting beams (9) and the newly added side formwork of the enclosing purlin beams (10) are disassembled when the concrete strength reaches 1.2MPa, and the newly added supporting beams (9) and the newly added bottom formwork of the enclosing purlin beams (10) are disassembled after the concrete strength reaches 80%; the side mold is maintained in time after being detached so as to reduce the shrinkage crack phenomenon on the surface of the concrete;
9) shallow foundation pit area support beam dismantling method
After the concrete strength of the vertical rib plate (4), the inner partition wall (5), the newly added supporting beam (9) and the newly added surrounding purlin beam (10) reaches 80% of the design strength, the supporting beam (2) in the shallow foundation pit area is removed, manual chiseling is adopted in the removing process of the supporting beam (2) in the shallow foundation pit area, and a supporting beam main rib (12) needs to be reserved in the supporting removing process of the supporting beam at the position corresponding to the inner partition wall (5) so as to ensure that the part is better connected with the newly poured vertical rib plate (4), the inner partition wall (5) and the newly added surrounding purlin beam (10);
10) construction of inner partition wall, vertical rib plate and surrounding purlin beam at removal position of supporting beam
After the supporting beam (2) in the shallow foundation pit region is removed and cleaned, a supporting beam main rib region (12) reserved after the supporting beam (2) in the shallow foundation pit region is removed is subjected to vertical rib plate (4), inner partition wall (5), newly-added surrounding purlin beam (10) reinforcement, template installation and concrete pouring, and when the concrete is poured, high-elevation micro-expansion concrete is adopted for pouring and is vibrated and compacted;
construction for dismantling inner partition wall, vertical rib plate and structural beam slab column at elevation position of supporting beam surface to upper structural beam surface
After the construction of an inner partition wall (5), a vertical rib plate (4) and a newly-added purlin surrounding beam (10) at the position where a shallow foundation pit area supporting beam (2) is removed is completed, the construction of the original supporting beam (13) beam surface to an upper-layer structure beam surface elevation inner partition wall (5), the vertical rib plate (4), an upper-layer structure beam plate (14) and a wall plate of the structure column is carried out, the inner partition wall (5) and the vertical rib plate (4) are bound and supported together with the structure column, horizontal distribution ribs of the vertical rib plate (4) are arranged on the outer side of vertical reinforcing steel bars of the rib plate and anchored in the inner partition wall, and when the position of the vertical rib plate and the horizontal projection position of the structure beam (15) are overlapped and have the same width, the large value and the small value of the horizontal distribution ribs of the vertical rib plate and the waist rib of the structure beam are taken from the waist rib in the height range of the structure beam; when the position of the vertical rib plate is partially overlapped with the horizontal projection position of the structural beam, the vertical and horizontal steel bars of the vertical rib plate need to avoid the main steel bar of the structural beam.
2. The construction method for replacing the support of the vertical rib plate of the drop-type deep foundation pit according to claim 1, wherein the earthwork excavation of the first layer to the fourth layer in the shallow foundation pit region and the deep foundation pit region in the step 1) adopts a slope to remove the earthwork, and the earthwork of the fifth layer and the sixth layer in the deep foundation pit region adopts a tire type grab bucket machine to grab the earthwork on the trestle and load the earthwork for outward transportation.
3. The construction method for replacing the support of the vertical rib plate of the drop-type deep foundation pit as claimed in claim 1, wherein the width of the hidden beam (3) in the step 2) is the same as the width of the underground continuous wall arranged at the intersection of the deep and shallow foundation pits, and the height of the hidden beam extends from the top surface of the bottom plate of the shallow foundation pit area to the bottom surface of the next supporting beam.
4. The construction method for replacing the support of the vertical rib plate of the drop-type deep foundation pit according to claim 1, wherein the length of the bent anchor steel bar (11) in the step 5) is the sum of the thickness of the inner partition wall (5) and the width of the newly-added surrounding purlin beam (10) minus the thickness of the concrete protective layers on two sides.
5. The construction method for replacing the support of the vertical rib plate of the drop-type deep foundation pit as claimed in claim 1, wherein the maintenance in the step 8) adopts a method of covering a plastic film or a maintenance blanket and combining with watering maintenance, water is frequently sprayed to keep the vertical rib plate wet before form removal and during maintenance, and the maintenance time is not less than 7 days; if the water can not be sprayed for maintenance in winter, a maintenance method combining coating maintenance agent and plastic film is adopted, and the maintenance time is not less than 14 days.
6. The construction method for replacing the support of the vertical rib plate of the drop-down deep foundation pit according to claim 1, wherein the inner partition wall and the vertical rib plate in the step 11) are cast with concrete together with a structural beam slab column, a vibrating rod with the diameter of 3CM is adopted in the concrete casting process to ensure that the vibration is compact, the vertical rib plate and the side mold of the inner partition wall are demolished when the strength reaches 1.2MPa after the concrete casting is finished, a method for covering a plastic film or a maintenance blanket and combining watering maintenance is adopted after the side mold is demolished, water is frequently sprayed before demolition and during maintenance to keep moist, and the maintenance time is not less than 7 d; if the water can not be sprayed for maintenance in winter, a maintenance method combining coating maintenance agent and plastic film is adopted, and the maintenance time is not less than 14 days.
7. The utility model provides a formula of falling deep basal pit vertical rib board trades strut structure, installs between shallow basal pit region (A) and deep basal pit region (B), its characterized in that includes vertical rib board (4), interior partition wall (5), newly-increased supporting beam (9) and newly-increased purlin beam (10) of enclosing, interior partition wall (5) set up between shallow basal pit region (A) and deep basal pit region (B), vertical rib board (4) set up in shallow basal pit region (A), newly-increased supporting beam (9) and newly-increased purlin beam (10) set up in deep basal pit region (B), vertical rib board (4) bottom is located bottom plate (1), the side is near including partition wall (5) one side, newly-increased purlin beam (10) are located interior partition wall (5) opposite side, with vertical rib board (4), newly-increased supporting beam (9) are located between former supporting beam (13) and newly-increased purlin beam (10).
8. The drop-type deep foundation pit vertical rib plate support replacing structure as claimed in claim 7, wherein the newly added support beam (9) is in a right-angled triangle structure, and two right-angled edges are respectively abutted against the original support beam (13) and the newly added surrounding purlin beam (10).
9. The vertical rib plate support replacing structure of the drop-type deep foundation pit as claimed in claim 7, wherein the end of the inner partition wall (5) is connected with the main rib area (12) of the support beam.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710128055.4A CN106836238B (en) | 2017-03-06 | 2017-03-06 | Construction method and structure for replacing support of vertical rib plate of drop-type deep foundation pit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710128055.4A CN106836238B (en) | 2017-03-06 | 2017-03-06 | Construction method and structure for replacing support of vertical rib plate of drop-type deep foundation pit |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106836238A CN106836238A (en) | 2017-06-13 |
| CN106836238B true CN106836238B (en) | 2022-05-20 |
Family
ID=59137291
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710128055.4A Active CN106836238B (en) | 2017-03-06 | 2017-03-06 | Construction method and structure for replacing support of vertical rib plate of drop-type deep foundation pit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106836238B (en) |
Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107386298A (en) * | 2017-07-19 | 2017-11-24 | 中铁第四勘察设计院集团有限公司 | A kind of depth hole composite supporting construction and its construction method with water-proof function |
| CN108316314A (en) * | 2018-03-13 | 2018-07-24 | 中铁第四勘察设计院集团有限公司 | A kind of inner supporting structure for solving to cheat biasing problem in depth foundation pit |
| CN109723085B (en) * | 2019-01-17 | 2020-11-27 | 中建三局集团有限公司 | Deep foundation pit division construction rib wall support replacing structure and construction method thereof |
| CN112030983B (en) * | 2020-07-26 | 2021-11-16 | 中铁建工集团有限公司 | Support replacing system for bottom plate of mucky soil layer foundation pit in deep foundation pit supporting construction |
| CN112281895A (en) * | 2020-11-24 | 2021-01-29 | 中交二航局第一工程有限公司 | Bearing platform structure for sandy gravel stratum and construction method |
| CN112813983B (en) * | 2020-12-31 | 2022-07-22 | 长江勘测规划设计研究有限责任公司 | A cantilever beam-column system and construction method implemented simultaneously with the depth of the pit in the pit |
| CN113482009B (en) * | 2021-07-20 | 2022-11-29 | 上海建工一建集团有限公司 | Bottom plate reinforcing joint of embedded support and construction method thereof |
| CN115233700A (en) * | 2022-08-29 | 2022-10-25 | 中建三局集团华南有限公司 | Supporting beam conversion structure in foundation pit and construction method thereof |
| CN115492128B (en) * | 2022-10-28 | 2023-11-21 | 上海市机械施工集团有限公司 | Variable cross section ground wall supporting method for junction of standard section and end well of foundation pit |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102002953A (en) * | 2010-12-02 | 2011-04-06 | 上海市第四建筑有限公司 | Method for changing support of foundation pit enclosing rib plates |
| CN104912098A (en) * | 2015-06-01 | 2015-09-16 | 中建四局第六建筑工程有限公司 | Combined construction method for supporting beam plate and structural plate of deep foundation pit |
| CN206607593U (en) * | 2017-03-06 | 2017-11-03 | 浙江省一建建设集团有限公司 | One kind falls the vertical floor support changing structure for use of grade formula deep basal pit |
-
2017
- 2017-03-06 CN CN201710128055.4A patent/CN106836238B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102002953A (en) * | 2010-12-02 | 2011-04-06 | 上海市第四建筑有限公司 | Method for changing support of foundation pit enclosing rib plates |
| CN104912098A (en) * | 2015-06-01 | 2015-09-16 | 中建四局第六建筑工程有限公司 | Combined construction method for supporting beam plate and structural plate of deep foundation pit |
| CN206607593U (en) * | 2017-03-06 | 2017-11-03 | 浙江省一建建设集团有限公司 | One kind falls the vertical floor support changing structure for use of grade formula deep basal pit |
Non-Patent Citations (1)
| Title |
|---|
| 软土深基坑工程控制拆撑变形的换撑设计方法;朱小军;《岩土工程学报》;20100715;全文 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN106836238A (en) | 2017-06-13 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN106836238B (en) | Construction method and structure for replacing support of vertical rib plate of drop-type deep foundation pit | |
| CN102966114B (en) | Tower crane foundation structure and construction method thereof | |
| CN103615110B (en) | Random oblique netted nine-squares beam Hyperbolic Roof construction method | |
| CN110905523A (en) | Subway vertical shaft construction method | |
| CN103806647A (en) | Assembly and disassembly process for large-span concrete bidirectional dense rib beam formwork case | |
| WO2024074079A1 (en) | Prefabricated assembled reinforced concrete retaining wall and construction method therefor | |
| CN109339479B (en) | Internal replacement structure and method for existing reinforced concrete building | |
| CN103161176A (en) | Tower crane foundation construction method in main building connected garage | |
| CN208023601U (en) | A kind of prefabricated pile foundation support table side form of mutual buckle type | |
| CN105780992B (en) | A kind of orthogonal spatial Rc Open-web Sandwich Plates floor construction engineering method | |
| CN116910854A (en) | Large-span arch concrete structure construction method based on digital construction | |
| CN103882883B (en) | Tower crane and garage frame post share a foundation construction method | |
| CN207944339U (en) | A kind of prefabricated superposed type anti-collision wall for urban viaduct | |
| CN110106915A (en) | One kind exempts from that support is inverse to make underground engineering construction method and underground construction structure | |
| CN101929245A (en) | Thin webbed girder vertical construction method | |
| CN208293599U (en) | Basement top-down method Combined tower crane foundation structure | |
| CN208122041U (en) | A kind of IPS Cast-in-place concrete shear wall structure of self-heat preservation system system | |
| CN109944265A (en) | The method for carrying out foundation construction using concrete light scutum | |
| CN106193578B (en) | It is a kind of that modular system and construction technology are matched somebody with somebody based on groove type quarter bend | |
| CN115387393A (en) | Quick construction method of post-pouring belt pre-sealing | |
| CN209703524U (en) | A kind of side slope precast lattice beam of reinforcing bar connection | |
| CN208858150U (en) | A kind of rib floor mold | |
| CN106869387A (en) | Multi-ribbed plate Structural Floor System HZ concrete film construction methods | |
| CN111622263A (en) | Comprehensive pipe gallery construction method based on composite material combined type template system | |
| CN222513105U (en) | A formwork-free construction system for trestle slabs |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |