CN117868144A - Intelligent recyclable assembled structure for foundation pit support and construction method - Google Patents
Intelligent recyclable assembled structure for foundation pit support and construction method Download PDFInfo
- Publication number
- CN117868144A CN117868144A CN202410049678.2A CN202410049678A CN117868144A CN 117868144 A CN117868144 A CN 117868144A CN 202410049678 A CN202410049678 A CN 202410049678A CN 117868144 A CN117868144 A CN 117868144A
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- foundation pit
- prestress
- truss
- intelligent
- displacement
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- 238000010276 construction Methods 0.000 title description 10
- 238000012544 monitoring process Methods 0.000 claims abstract description 55
- 238000006073 displacement reaction Methods 0.000 claims abstract description 41
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 40
- 239000010959 steel Substances 0.000 claims abstract description 40
- 238000005553 drilling Methods 0.000 claims description 14
- 238000009412 basement excavation Methods 0.000 claims description 9
- 238000000034 method Methods 0.000 claims description 9
- 230000008569 process Effects 0.000 claims description 5
- 230000008859 change Effects 0.000 abstract description 2
- 239000011150 reinforced concrete Substances 0.000 description 4
- 239000003795 chemical substances by application Substances 0.000 description 3
- 238000003466 welding Methods 0.000 description 3
- 238000004873 anchoring Methods 0.000 description 2
- 239000011083 cement mortar Substances 0.000 description 2
- 239000004567 concrete Substances 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000003292 glue Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 210000003205 muscle Anatomy 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 239000002689 soil Substances 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
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
- E02D33/00—Testing foundations or foundation structures
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)
Abstract
The invention provides an intelligent recyclable assembled structure for foundation pit support, which comprises an enclosure structure arranged on the inner side of a foundation pit, and further comprises: the truss is arranged on the inner side of the foundation pit support structure; the inner supports are arranged between the enclosure structures and are used for supporting the enclosure structures at two sides; the prestress rod piece is arranged between truss frames at two sides of the foundation pit and used for adjusting prestress between two adjacent trusses; the displacement monitoring point is arranged at the top of the foundation pit; the invention is fixed on the existing foundation pit support structure by utilizing the trusses, the waist beams and the prestress rod pieces, the prestress is applied to the prestress rod pieces between the trusses, the horizontal and vertical displacement of the side wall of the foundation pit is monitored by the displacement monitoring points, the control module receives the stress information of the prestress rod pieces and the foundation pit change information of the displacement monitoring points, the prestress rod pieces can be controlled by the control module to adjust the prestress, the foundation pit deformation is controlled, and the advantages of automation and steel support are considered.
Description
Technical Field
The invention relates to the technical field of civil engineering, in particular to an intelligent recyclable assembled structure for foundation pit support and a construction method.
Background
At present, in deep foundation pit support, as the depth of a foundation pit is large, the horizontal pressure of a soil retaining structure is also large, and reinforced concrete supports and steel supports are generally selected when support structure design is carried out. The reinforced concrete support has the characteristics of high rigidity and small deformation, and can ensure the safety of basement construction and foundation construction, and public facilities such as surrounding adjacent buildings, roads, underground pipelines and the like, but the defects of the reinforced concrete support are obvious, the reinforced concrete support has large self weight, is not easy to recycle materials, is harmful to the environment, cannot realize carbon emission reduction, and has a slightly more cost than the steel inner support. The steel support has the advantages of light dead weight, easy construction, low cost, recycling and environmental protection. But the disadvantages are more evident: the rigidity is small, the interval is dense, and the subsequent construction space is small. Therefore, a foundation pit supporting structure capable of combining the advantages of concrete support and steel support needs to be designed.
Disclosure of Invention
The invention provides an intelligent recyclable assembled structure for foundation pit support, which forms a large-span foundation pit space and an intelligent foundation pit deformation control structure and takes the advantages of a concrete support and a steel support into consideration.
In order to solve the technical problems, the invention adopts the following technical scheme:
an intelligent recoverable assembled structure for foundation ditch support, including setting up in the inboard envelope of foundation ditch, still include:
the truss is arranged on the inner side of the foundation pit enclosure structure;
the inner supports are arranged between the enclosure structures to form support for the enclosure structures at two sides;
the prestress rod piece is arranged between truss frames at two sides of the foundation pit and used for adjusting prestress between two adjacent trusses;
the displacement monitoring point is arranged at the top of the foundation pit and used for detecting the deformation of the foundation pit; and
and the control module is connected with the prestress rod piece and the displacement monitoring point and is used for collecting the deformation of the foundation pit and the prestress data of the prestress rod piece and feeding back and adjusting the prestress between the trusses.
Preferably, the truss comprises a waist beam horizontally arranged on the side wall of the enclosure structure, a plurality of section steel forming a triangular structure along the side wall of the waist beam in a basically parallel mode, steel plate brackets arranged below the waist beam and connected with the enclosure structure, and upright posts parallel to the enclosure structure and arranged in the foundation pit and used for fixing the truss.
Preferably, the prestress rod piece comprises a prestress tensioner and anchor heads which are arranged at two ends of the prestress tensioner and are connected with two adjacent truss frames.
Preferably, the inner support comprises a support body arranged between two opposite wales inside the foundation pit, and side ribs arranged between the wales and the support body.
Preferably, the displacement monitoring points comprise monitoring points arranged at the top of the foundation pit and total stations for detecting horizontal and vertical displacement of the drilled hole, and the total stations are in signal connection with the control module.
Preferably, the control module is an operation terminal in signal connection with the prestress tensioner and the total station.
The construction method of the intelligent recyclable assembled structure for foundation pit support comprises the following steps of:
s10: mounting a waist beam on the enclosure structure;
s20: a truss is arranged on the waist beam;
s30: a prestress rod piece is arranged between the frame bodies of two adjacent trusses;
s40: setting a displacement monitoring point at the top of the foundation pit, and connecting the prestress tensioner with the displacement monitoring point with a control module;
s50: the prestress tensioner applies initial prestress, foundation pit excavation is carried out, and the size of the prestress is automatically controlled in the excavation process.
Preferably, the step S20 further includes the steps of:
s210: arranging the section steel along the side wall of the waist beam to form a truss structure with triangular distribution;
s220: and connecting inner supports between waist beams at two sides of the foundation pit.
Preferably, S30 further includes the step of installing anchor heads on top of adjacent trusses and installing prestressed tensioners between the anchor heads.
Preferably, the step S40 includes the steps of:
s410: drilling holes at the top of the foundation pit, and arranging monitoring points in the drilled holes;
s420: filling gaps around the drill holes and the monitoring points to stabilize the monitoring points;
s430: and monitoring displacement of the monitoring points by adopting a total station, and feeding back displacement data to the control module.
According to the technical scheme, the invention has the following beneficial effects: when the foundation pit support structure is used, the trusses, the waist beams and the prestress rod pieces are fixed on the existing foundation pit support structure, the prestress rod pieces between the trusses are subjected to prestress, the horizontal and vertical displacement of the side walls of the foundation pit is monitored through the displacement monitoring points, the control module receives stress information of the prestress rod pieces and foundation pit change information of the displacement monitoring points, the prestress rod pieces can be controlled by the control module to adjust the prestress, foundation pit deformation is controlled, and the foundation pit space with a large span and the intelligent foundation pit deformation control structure are formed.
Drawings
FIG. 1 is a top view of the present invention in connection with an enclosure, an inner support;
FIG. 2 is a schematic perspective view of the present invention in connection with an enclosure, an inner support;
FIG. 3 is a schematic perspective view of a truss;
FIG. 4 is a cross-sectional view of the truss attachment to the enclosure;
fig. 5 is a flow chart of the construction method provided by the invention.
In the figure: 10. a building envelope; 20. truss; 210. waist beam; 220. a steel plate bracket; 230. a column; 30. an inner support; 310. a support body; 320. side ribs; 410. a prestress tensioner; 420. an anchor head; 50. displacement monitoring points; 60. and a control module.
Detailed Description
A preferred embodiment of the present invention will be described in detail with reference to the accompanying drawings.
In order to achieve the above object, the embodiments of the present invention provide the following technical solutions: referring to fig. 1, an intelligent recoverable assembled structure for supporting a foundation pit comprises a supporting structure 10 arranged on the inner side of the foundation pit, a truss 20, an inner support 30, a prestress rod piece 40, a displacement monitoring point 50 and a control module 60, wherein the truss 20 is arranged on the inner side of the supporting structure 10 of the foundation pit, the inner support 30 is arranged between the supporting structures 10 to form a pair of supports for the supporting structure 10 on the two sides, the prestress rod piece 40 is arranged between truss 20 frame bodies on the two sides of the foundation pit and is used for adjusting prestress between two adjacent trusses 20, the displacement monitoring point 50 is arranged at the top of the foundation pit and is used for detecting deformation of the foundation pit, the control module 60 is connected with the prestress rod piece 40 and the displacement monitoring point 50 and is used for collecting prestress data of the foundation pit deformation and the prestress rod piece 40 and feeding back and adjusting the prestress between the trusses 20.
Referring to fig. 2 and fig. 4, as a preferred technical solution of this embodiment, the truss 20 includes a waist rail 210, steel sections, steel plate brackets 220 and a column 230, where the waist rail 210 is disposed on a side wall of the enclosure 10 in a horizontal manner, the waist rail is used for transferring a load of the retaining structure, and the waist rail may use H-shaped steel or i-shaped steel, the number of the steel sections is plural, and the plural steel sections form a triangle structure along the side wall of the waist rail 210 in a substantially parallel manner, that is, the plural steel sections are connected end to end along the side wall of the waist rail to form a triangle steel structure extending from the waist rail to the inside of the foundation pit, further, in order to realize a stable connection between the waist rail 210 and the enclosure 10, the steel plate brackets 220 are disposed under the waist rail 210 and the enclosure 10, specifically, the steel plate brackets may be welded on the enclosure 10, the column 230 is disposed parallel to the enclosure 10, and may be fixedly welded on an end far away from the waist rail, and in use, the steel sections may be connected with the waist rail by using high-strength bolts, and the adjacent two steel sections may be fixed by welding manner, that the truss forms a triangle steel structure extending from the waist rail along the side wall, and the side wall of the foundation pit, and further, in order to form a square steel plate by welding, and adopting a splicing steel plate.
Referring to fig. 2 and 3, as a preferred technical solution of this embodiment, the prestress rod member includes a prestress tensioner 410 and anchor heads 420 disposed at two ends of the prestress tensioner 410 and connected to two adjacent truss 20 frames, when in use, the prestress tensioner is fixed between the two adjacent truss frames by the anchor heads, the anchor heads may be steel strands or other steels, and it is noted that the prestress tensioner makes the trusses at two sides form a pair, so as to apply prestress to the trusses, and may adopt different types of tensioners such as MD18/300/55 type, MD 19/300/55 type, MD19/400/55 type, etc. according to the required prestress.
Referring to fig. 2, as a preferred technical solution of the present embodiment, the inner support 30 includes a support body 310 and a side rib 320, the support body 310 is disposed between two opposite wales 210 inside the foundation pit, the side rib 320 is disposed between the wales 210 and the support body 310, and the side rib 320 forms a triangle structure between the inner support 30 and the wales to provide a supporting force to the wales, thereby improving the stability of the connection of the inner support and the wales, and further, the support body and the side rib may be H-shaped steel or steel pipes.
As the preferred technical scheme of this embodiment, displacement monitoring point 50 is including setting up the monitoring point at the foundation ditch top and being used for detecting the total powerstation of drilling level and vertical displacement volume, just total powerstation and control module signal connection, during the use, through drilling at the foundation ditch top, lay the monitoring point in the drilling, will the monitoring point of total powerstation place in the drilling, cement mortar or anchoring agent, plant the muscle and glue to fill in the space between drilling and monitoring point to reach the purpose of fixed stable monitoring point, in this way, available station monitoring foundation ditch warp, the level and the vertical displacement of monitoring foundation ditch through the total powerstation promptly, and can feed back data result to control module.
Further, the control module 60 is an operation terminal in signal connection with the prestress stretcher 410 and the total station, and the operation terminal is connected with the prestress stretcher and the total station, and by collecting the axial force information fed back by the prestress rod and the foundation pit deformation, the force of the prestress stretcher can be adjusted according to the axial force information fed back by the prestress rod, so that the foundation pit deformation can be controlled and the axial force of the prestress rod can meet the design requirement.
Referring to fig. 5, the invention further provides a construction method of the intelligent recyclable assembled structure for foundation pit support, comprising the following steps:
s10: and installing a waist beam on the enclosure structure.
Specifically, a waist beam is installed on the existing foundation pit support structure, specifically, the waist beam can be fixed on the side wall of the support structure in a mode of being parallel to the bottom surface of the foundation pit in a mode of welding the inner side by arranging steel plate brackets at the bottom.
S20: and installing a truss on the waist beam.
Specifically, after the waist rail is fixed, the truss is fixed on the side wall of the waist rail in a manner parallel to the bottom surface of the foundation pit, and particularly, a triangular steel structure extending from the waist rail to the interior of the foundation pit is formed.
S30: and prestress rod members are arranged between the frame bodies of two adjacent trusses.
Specifically, after the trusses and the waist beams are fixed, prestress rod pieces are installed between the frame bodies of two adjacent trusses, the prestress rod pieces are utilized to apply prestress to the trusses, and the prestress of the trusses can be adjusted.
S40: and setting a displacement monitoring point at the top of the foundation pit, and connecting the prestress tensioner and the displacement monitoring point with a control module.
Specifically, offer the drilling at foundation ditch top, arrange the displacement monitoring point in the drilling to monitor the space displacement volume of foundation ditch, specifically, set up the station setting of total powerstation inside the drilling and fill fixedly, and then make total powerstation and control module electric connection.
S50: the prestress tensioner applies initial prestress, foundation pit excavation is carried out, and the size of the prestress is automatically controlled in the excavation process.
Specifically, after the S10-S40 is completed, an initial prestress is applied to the truss by the prestress tensioner, then excavation of the foundation pit is performed, horizontal and vertical displacement of the foundation pit is monitored by the displacement monitoring points in the excavation process, and the prestress applied to the truss is controlled by the prestress tensioner.
Further, the step S20 further includes the following steps:
s210: and arranging the section steel along the side wall of the waist beam to form a truss structure with triangular distribution.
Specifically, when the truss is installed, the section steel is specifically arranged into a triangular steel structure along the side wall of the waist beam, so that the connection stability of the truss and the waist beam is improved by utilizing the stability of the triangle.
S220: and connecting inner supports between waist beams at two sides of the foundation pit.
Specifically, after the section steel and the waist beams are connected, an inner support is connected between the waist beams at two sides of the foundation pit, so that the stability of connection between the truss and the waist beams is improved.
Further, the step S30 further includes the step of installing anchor heads at the tops of adjacent trusses and installing prestress tensioners between the anchor heads, specifically, arranging anchor heads at two ends of the prestress tensioners, and connecting the anchor heads with two adjacent truss frames through the anchor heads, wherein the anchor heads can be made of steel strands or other steels, so that the prestress tensioners and the trusses are installed.
Further, the step S40 includes the following steps:
s410: drilling holes at the top of the foundation pit, and arranging monitoring points in the drilling holes.
Specifically, when the displacement monitoring points are distributed, drilling holes are formed in the top of the foundation pit, and stainless steel measuring head measuring points are distributed in the drilling holes.
S420: and filling gaps around the drill holes and the monitoring points to stabilize the monitoring points.
Specifically, after the monitoring points are installed, gaps around the monitoring points and the drilled holes are filled and fixed by cement mortar or anchoring agents and bar planting agents, so that dislocation of the monitoring points is prevented, and foundation pit deformation is monitored through the monitoring points.
S430: and monitoring displacement of the displacement monitoring point by adopting a total station, and feeding back displacement data to the control module.
Specifically, in the foundation pit excavation process, displacement of the monitoring points is measured through the total station, and monitoring data is fed back to the control module in real time.
The above-described embodiments are merely illustrative of the preferred embodiments of the present invention and are not intended to limit the scope of the present invention, and various modifications and improvements made by those skilled in the art to the technical solution of the present invention should fall within the scope of protection defined by the claims of the present invention without departing from the spirit of the present invention.
Claims (10)
1. An intelligent recoverable assembled structure for foundation ditch support, including setting up in the inboard envelope (10) of foundation ditch, its characterized in that still includes:
the truss (20) is arranged on the inner side of the foundation pit support structure (10);
the inner supports (30) are arranged between the enclosing structures (10) and are used for supporting the enclosing structures (10) at two sides;
the prestress rod piece (40) is arranged between truss (20) frame bodies at two sides of the foundation pit and used for adjusting prestress between two adjacent trusses (20);
the displacement monitoring point (50) is arranged at the top of the foundation pit and used for detecting the deformation of the foundation pit; and
the control module (60) is connected with the prestress rod (40) and the displacement monitoring point (50) and is used for collecting the deformation of the foundation pit and the prestress data of the prestress rod (40) and feeding back and adjusting the prestress between the trusses (20).
2. The intelligent recyclable assembled structure for foundation pit support according to claim 1, wherein the truss (20) comprises a wale (210) horizontally arranged on a side wall of the enclosure structure (10), a plurality of section steel forming a triangular structure along the side wall of the wale (210) in a substantially parallel manner, steel plate brackets (220) arranged below the wale (210) and connected with the enclosure structure (10), and upright posts (230) arranged inside the foundation pit in parallel to the enclosure structure (10) for fixing the truss (20).
3. The intelligent recyclable assembled structure for foundation pit support according to claim 1, wherein the prestress rod member (40) comprises prestress tensioners (410) and anchor heads (420) arranged at two ends of the prestress tensioners (410) and connected with the frame bodies of two adjacent trusses (20).
4. An intelligent, recyclable modular structure for foundation pit support according to claim 3, characterized in that the inner support (30) comprises a support body (310) arranged between two opposite wales (210) inside the foundation pit and a side rib (320) arranged between the wales (210) and the support body (310).
5. An intelligent recyclable assembled structure for foundation pit support according to claim 3, wherein the displacement monitoring points (50) comprise monitoring points arranged at the top of the foundation pit and total stations for detecting horizontal and vertical displacement of the drilled hole, and the total stations are in signal connection with a control module.
6. The intelligent recyclable assembled structure for foundation pit support according to claim 5, wherein the control module (60) is an operation terminal in signal connection with the prestress tensioner (410) and the total station.
7. A method of constructing an intelligent recyclable modular structure for foundation pit bracing according to any one of claims 1-6, comprising the steps of:
s10: mounting a waist beam on the enclosure structure;
s20: a truss is arranged on the waist beam;
s30: a prestress rod piece is arranged between the frame bodies of two adjacent trusses;
s40: setting a displacement monitoring point at the top of the foundation pit, and connecting the prestress tensioner with the displacement monitoring point with a control module;
s50: the prestress tensioner applies initial prestress, foundation pit excavation is carried out, and the size of the prestress is automatically controlled in the excavation process.
8. The method of constructing an intelligent recyclable modular structure for foundation pit bracing according to claim 7, wherein S20 further comprises the steps of:
s210: arranging the section steel along the side wall of the waist beam to form a truss structure with triangular distribution;
s220: and connecting inner supports between waist beams at two sides of the foundation pit.
9. The method of constructing an intelligent, recyclable modular structure for foundation pit bracing according to claim 8, wherein S30 further comprises the steps of installing anchor heads on top of adjacent trusses and installing prestress tensioners between the anchor heads.
10. The method of constructing an intelligent recyclable modular structure for foundation pit bracing according to claim 9, wherein S40 comprises the steps of:
s410: drilling holes at the top of the foundation pit, and arranging monitoring points in the drilled holes;
s420: and filling gaps around the drill holes and the monitoring points to stabilize the monitoring points.
S430: and monitoring displacement of the monitoring points by adopting a total station, and feeding back displacement data to the control module.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202410049678.2A CN117868144A (en) | 2024-01-12 | 2024-01-12 | Intelligent recyclable assembled structure for foundation pit support and construction method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202410049678.2A CN117868144A (en) | 2024-01-12 | 2024-01-12 | Intelligent recyclable assembled structure for foundation pit support and construction method |
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| Publication Number | Publication Date |
|---|---|
| CN117868144A true CN117868144A (en) | 2024-04-12 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202410049678.2A Pending CN117868144A (en) | 2024-01-12 | 2024-01-12 | Intelligent recyclable assembled structure for foundation pit support and construction method |
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| CN (1) | CN117868144A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN118166790A (en) * | 2024-04-19 | 2024-06-11 | 广西大学 | Construction technology of multi-layer internal support system of assembled cable-stayed space steel truss in deep foundation pit |
-
2024
- 2024-01-12 CN CN202410049678.2A patent/CN117868144A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN118166790A (en) * | 2024-04-19 | 2024-06-11 | 广西大学 | Construction technology of multi-layer internal support system of assembled cable-stayed space steel truss in deep foundation pit |
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