CN112127390B - Construction technology for simply plugging reserved sleeve of outer wall in underground structure area - Google Patents
Construction technology for simply plugging reserved sleeve of outer wall in underground structure area Download PDFInfo
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- CN112127390B CN112127390B CN202010915275.3A CN202010915275A CN112127390B CN 112127390 B CN112127390 B CN 112127390B CN 202010915275 A CN202010915275 A CN 202010915275A CN 112127390 B CN112127390 B CN 112127390B
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- 238000010276 construction Methods 0.000 title claims abstract description 46
- 238000005516 engineering process Methods 0.000 title description 3
- 239000000463 material Substances 0.000 claims abstract description 26
- 238000000034 method Methods 0.000 claims abstract description 14
- 229910000831 Steel Inorganic materials 0.000 claims description 103
- 239000010959 steel Substances 0.000 claims description 103
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 18
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 18
- 238000009412 basement excavation Methods 0.000 claims description 9
- 229910052742 iron Inorganic materials 0.000 claims description 9
- 229910001294 Reinforcing steel Inorganic materials 0.000 claims description 8
- 238000004140 cleaning Methods 0.000 claims description 6
- 238000013461 design Methods 0.000 claims description 6
- 238000004519 manufacturing process Methods 0.000 claims description 6
- 230000002787 reinforcement Effects 0.000 claims description 6
- 238000005520 cutting process Methods 0.000 claims description 5
- 230000007547 defect Effects 0.000 claims description 4
- 238000012423 maintenance Methods 0.000 claims description 3
- 238000005096 rolling process Methods 0.000 claims description 3
- 239000002689 soil Substances 0.000 claims description 3
- 230000007306 turnover Effects 0.000 claims description 3
- 238000003466 welding Methods 0.000 claims description 3
- 230000000149 penetrating effect Effects 0.000 claims description 2
- 238000007789 sealing Methods 0.000 claims description 2
- 238000012669 compression test Methods 0.000 claims 1
- 239000010410 layer Substances 0.000 abstract description 61
- 239000003337 fertilizer Substances 0.000 abstract description 7
- 239000011241 protective layer Substances 0.000 abstract description 2
- 239000000945 filler Substances 0.000 abstract 1
- 230000008520 organization Effects 0.000 abstract 1
- 238000009434 installation Methods 0.000 description 4
- 239000007779 soft material Substances 0.000 description 3
- 238000011144 upstream manufacturing Methods 0.000 description 3
- 239000004568 cement Substances 0.000 description 2
- 238000005056 compaction Methods 0.000 description 2
- 238000010408 sweeping Methods 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 230000000903 blocking effect Effects 0.000 description 1
- 238000009435 building construction Methods 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000013049 sediment Substances 0.000 description 1
Classifications
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D29/00—Independent underground or underwater structures; Retaining walls
- E02D29/16—Arrangement or construction of joints in foundation structures
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D31/00—Protective arrangements for foundations or foundation structures; Ground foundation measures for protecting the soil or the subsoil water, e.g. preventing or counteracting oil pollution
- E02D31/02—Protective arrangements for foundations or foundation structures; Ground foundation measures for protecting the soil or the subsoil water, e.g. preventing or counteracting oil pollution against ground humidity or ground water
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- Life Sciences & Earth Sciences (AREA)
- Environmental & Geological Engineering (AREA)
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- Mining & Mineral Resources (AREA)
- Paleontology (AREA)
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- General Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Hydrology & Water Resources (AREA)
- Underground Structures, Protecting, Testing And Restoring Foundations (AREA)
Abstract
The invention discloses a construction process for simply plugging an outer wall reserved sleeve in an underground structure area, which comprises the steps of firstly completing an outer wall column and the reserved sleeve in the underground structure area; the inner side and the outer side of the reserved sleeve are respectively provided with a railing and a baffle, and then the railing at the inner side and the baffle at the outer side of the pre-buried sleeve are fixed through a tie rod. After the baffle is fixed, a waterproof layer is added on the outer side of the baffle. And finally, backfilling and tamping the waterproof protective layer and the earthwork layering according to the conventional organization. When connecting the pipeline inside and outside the underground structure, water-stopping filler is embedded between the outer wall of the connecting pipe and the inner wall of the sleeve. The invention solves the problem that mud rain leaks into the underground structure after the earthwork of the fertilizer tank is backfilled, and achieves the purposes of convenient construction, material saving and labor force consumption reduction.
Description
Technical Field
The invention relates to a construction process for simply plugging an outer wall reserved sleeve in an underground structure area, in particular to a construction process for simply plugging an outer wall reserved sleeve in an underground structure area.
Background
With the continuous development of building construction technology, the space to be underground becomes normal. The outer wall plate of the underground structure is often penetrated by a pipeline, so that the connection between the inner pipeline and the outer pipeline of the underground structure is realized; but the pipeline installation is far later than the earthwork backfilling and other works outside the underground structure.
In order to improve the working environment of the structure construction, the backfilling of the earthwork of a foundation pit fertilizer groove is usually carried out after the construction of the underground structure is completed; when the outer pipeline of the underground structure is installed, the excavation of the earthwork of the pipeline groove, the installation of the pipeline and the like are sequentially carried out. And finally, backfilling the earthwork of the pipeline groove after the pipeline is installed and accepted. In order to solve the problem that the existence of a reserved sleeve on an external wall board in an underground structure area restricts backfilling of earthwork of a fertilizer tank, the sleeve is filled with cement, neps and other objects for temporary plugging. Due to the characteristics of cement, neps and other objects and the objective existence of gaps in the sleeve, the phenomenon of rain and mud leakage often occurs; the existence of rain and mud leakage can affect the working environment and construction conditions inside the underground structure; therefore, a construction method for simply plugging the wallboard sleeve of the underground structure, which is convenient and practical, is urgently needed in a construction site.
When the construction of the underground structure is completed according to the conventional method, various reserved sleeves with different numbers, different specifications and different heights are necessarily arranged on the column wall of the outer wall of the underground structure. The existence of the reserved sleeve ensures that the inside and the outside of the underground structure are communicated with each other, and is convenient for the installation of various pipelines in the later period.
But the existence of the reserved sleeve necessarily affects the backfill of the earthwork of the foundation pit fertilizer groove (namely, when the elevation of the backfill of the foundation pit earthwork is higher than that of the reserved sleeve, sediment and water can be continuously led into the underground structure according to the principle that water flows downwards). In view of the temporary nature of the preformed sleeve, it is common to fill the preformed sleeve with concrete or a soft material or the like. Because the characteristics of concrete or soft materials and the like are limited, the concrete or soft materials cannot be well combined with the reserved sleeve, and mud and rain can still leak along the defect between the walls of the reserved sleeve to enter the underground structure.
Disclosure of Invention
The invention aims to provide a construction process for simply plugging an outer wall reserved sleeve in an underground structure area.
The technical scheme adopted by the invention is as follows:
The invention relates to a construction process for simply plugging an outer wall reserved sleeve in an underground structure area, which comprises the following steps:
Step one: sequentially completing foundation pit earthwork excavation according to a construction rule of an underground structure to form an elevation line and a slope control line at the bottom of a foundation pit, sequentially completing concrete cushion pouring, waterproof layer laying under a raft and steel bar binding of the raft, calibrating an outer wall column position on steel bars of the raft, and pre-inserting vertical steel bars of an inner layer steel bar net sheet of a plane outer wall board and vertical steel bars of an outer layer steel bar net sheet on the calibrated outer wall column position; an outer wall column construction joint is arranged on the upper plane of the raft, and an outer wall column below the construction joint is a guide wall; a split bolt with a water stop wing ring is arranged on the guide wall, and a water stop steel plate is arranged in the middle of the upper plane of the guide wall; the outer wall column divides the underground structure into an inner region and an outer region; a waterproof layer is arranged on the concrete cushion layer beyond the scope of the raft and the waterproof layer paved on the concrete cushion layer; respectively connecting the inner row of vertical steel bars on the vertical steel bars of the inner layer steel bar net sheet of the outer wall plate to form an inner row of vertical steel bars, connecting the outer row of vertical steel bars on the vertical steel bars of the outer layer steel bar net sheet to form an outer row of vertical steel bars, then installing the horizontal inner row of steel bars on the outer side of the inner row of vertical steel bars, horizontally arranging the outer row of steel bars on the outer side of the outer row of vertical steel bars to form a double-layer steel bar net sheet of the outer wall column, internally installing ladder bars and drag hook bars, and installing a protection cushion block on the steel bar net sheet;
Step two: cutting a reserved sleeve meeting design requirements according to a design drawing, welding a water-stop wing ring on the reserved sleeve to manufacture a complete waterproof steel sleeve, and then carrying out pre-burying and fixing work of the waterproof reserved sleeve on a double-layer reinforcing steel mesh of an outer wall column according to the size of a drawing;
step three: binding the reinforcement cage, and performing mold closing operation after supervision and acceptance; during die assembly, a split bolt with a water stop wing ring is required to be installed on the double-layer reinforcing steel mesh; the outer sides of the double-layer reinforcing steel meshes are sequentially provided with a template, a template back ridge and double steel pipe keels, the double steel pipe keels are provided with mountain-shaped clamps, nuts are arranged on the split bolts, and the template of the outer wall column in the underground structure area is tensioned;
Step four: setting up a complete template support frame in the range of the underground structure by using a scaffold tube and auxiliary parts, wherein the template support frame comprises a template support frame upright rod, a horizontal rod and a sweeping rod; and a keel, a back rib and a template system at the bottom of the platform beam slab are sequentially paved on the upper part of the template support frame, and the platform beam slab bottom die system comprises the keel, the back rib and the template. Binding platform beam slab steel bars;
step five: according to the requirements of operation regulations, the concrete pouring of the outer wall column of the underground structure is completed;
Step six: according to the requirements of concrete construction specifications, curing the concrete of the outer wall column of the underground structure is completed; after maintenance is finished, loosening nuts of split bolts, removing double steel pipe keels, template back ribs and templates of a vertical structure according to the sequence of supporting before removing and supporting after removing, removing a platform beam plate bottom die system and a template support frame, and cleaning, piling and removing the removed turnover materials from a working surface;
step seven: cleaning the structural surface of the outer wall column in the underground structural area, and repairing the defect; removing the waterproof layer, and rolling up the raft lower waterproof layer which is thrown out (reserved) in the original way;
step eight: manufacturing a special fixing frame for reserving the sleeve; the fixed mount is provided with a wooden baffle plate with the outer diameter larger than 200mm of the sleeve, an iron pull rod is fixed on the baffle plate, and an iron railing is arranged at the end part of the iron pull rod;
step nine: performing waterproof layer construction according to the waterproof operation rule requirements; the waterproof layer is rolled into the reserved sleeve to form the waterproof layer in the reserved sleeve;
Step ten: special fixing frames (wooden baffle, railing and pull rod) for installing reserved sleeve positions are provided, and attention is paid to: the waterproof layer cannot be damaged when the special fixing frame is installed; one end of the fixing frame is provided with a wooden baffle plate, the wooden baffle plate is contacted with the waterproof material, the waterproof material is prevented from being damaged, and the special fixing frame is fixed with proper force, and the special fixing frame is not loosened after being installed.
Step eleven: adding waterproof coiled materials on the baffle side of a special fixing frame for reserving the sleeve position, and connecting the waterproof coiled materials with a waterproof layer;
step twelve: backfilling and tamping earthwork in layers according to the requirement of backfilling the earthwork of the foundation pit until the designed elevation is reached;
Step thirteen: before the pipeline construction outside the underground structure range, trench earthwork excavation is carried out according to the pre-buried positions of the water stop wing ring and the reserved sleeve, the pipe orifice position of the reserved sleeve is exposed, and the reserved sleeve is cleaned to the waterproof coiled material;
step fourteen: marking cross lines on the convex parts of the waterproof coiled materials, and gently tearing the waterproof coiled materials until the requirements of taking out the baffle plates are met;
Fifteen steps: loosening the connection between the pull rod and the railing inside the underground structure, and taking out the baffle of the special fixing frame of the reserved sleeve;
Step sixteen: cutting off redundant waterproof coiled materials;
seventeenth step: according to the operation rules, a connecting pipe penetrating through the waterproof reserved sleeve of the outer wall surface in the underground structure area is installed; and performing waterproof sealing treatment;
eighteenth step: and (3) completing external pipelines and the like, and backfilling the trench soil according to the operation procedure requirements after the compaction test is qualified.
The invention has the advantages that: the wooden baffle is fixed on the upstream surface side of the embedded sleeve by the pull rod and the steel railing (arranged on the upstream surface side of the reserved sleeve), and a waterproof layer is added on the outer side of the baffle (the waterproof layer is welded with a large-area waterproof layer of an outer wall column wall in an underground structure area to form a complete underground building). After the reserved sleeve on the outer wall column is plugged in this way, the problem that mud rain leaks into the underground structure after the earthwork of the fertilizer tank is backfilled is thoroughly solved; meanwhile, when the later-stage connecting pipe is constructed, the existence of the convex baffle plate and the waterproof layer prevents the large-area waterproof damage to the outer side of the underground structure when the pipe groove is excavated. On the basis of completing underground structure and waterproof sleeve pipe by means of conventional construction method, on the upstream surface and downstream surface sides of the reserved sleeve pipe a baffle plate and a railing are respectively mounted, and on the outside of baffle plate a waterproof layer is added (the waterproof layer is connected with large-area waterproof layer of underground structure wall column wall so as to form a complete underground structure (structure). The method solves the backfill of the earthwork of the fertilizer tank and the protection of the waterproof layer of the outer wall column wall in the underground structure area when the later connecting pipeline is communicated with the earthwork excavation, thereby realizing the purposes of convenient construction, saving materials and reducing labor consumption and really reflecting the requirements of environmental protection.
Drawings
Fig. 1 is a schematic structural view of the construction of a raft for a basement of the present invention.
Fig. 2 is a schematic structural view of the construction of the reinforcement of the basement exterior wall column of the present invention.
Fig. 3 is a schematic view of the construction of the exterior wall column and platform beam slab in the underground structural region of the present invention.
FIG. 4 is a schematic view of the concrete structure of the exterior wall column and platform beam slab in the underground structural region of the present invention.
Fig. 5 is a schematic view of temporary plugging structure for installing reserved pipe at the outer wall in the underground structure area.
FIG. 6 is a schematic view of the layered structure of the backfill of the outside earthwork of the outer wall in the subterranean zone of the present invention.
Fig. 7 is a schematic view of earth excavation at a junction required for a junction outside an outer wall in an underground structure region according to the present invention.
FIG. 8 is a schematic view of the structure of the present invention for connecting the inner and outer pipes of the outer wall in the underground structure area.
Fig. 9 is a schematic diagram of the structure for connecting and installing the inner and outer pipelines of the outer wall in the underground structure area according to the present invention.
Wherein: 1. the foundation pit bottom elevation line 2, a concrete cushion layer, 3, raft plates, 4, a side slope control line, 5, split bolts, 6, a water stop steel plate, 7, a vertical steel bar inner row bar, 71, a vertical steel bar of an inner steel bar net sheet of an outer wall plate, 8, a vertical steel bar outer row bar, 81, a vertical steel bar of an outer steel bar net sheet, 9, a horizontal steel bar outer row bar, 10, a horizontal steel bar inner row bar, 11 and a water stop wing ring; 12. the prefabricated sleeve pipe, 13, the template support frame, 14, the platform beam slab bottom die system, 15, the template back edge, 16, the template, 17, the double steel pipe keel, 18, the mountain-shaped clamp, 19, the waterproof layer, 191, the waterproof coiled material, 20, the steel sleeve waterproof layer, 21, the raft lower waterproof layer, 22, the waterproof layer, 23, the baffle, 24, the railing, 25, the pull rod, 26, the connecting pipe, 27, the waterproof material, 28, the guide wall, 29 and the outer wall column.
Detailed Description
As shown in fig. 1-9, the invention relates to a construction process for simply plugging an outer wall reserved sleeve in an underground structure area, which comprises the following steps:
Step one: and sequentially completing foundation pit earthwork excavation according to the construction rule of an underground structure, forming a foundation pit bottom elevation line 1 and a side slope control line 4, and sequentially completing concrete cushion layer 2 pouring, raft lower waterproof layer 21 laying and raft 3 concrete reinforcement binding. The position of the outer wall column 29 is marked on the steel bars of the raft 3 according to the design, the vertical steel bars 71 of the inner layer steel bar net sheet of the outer wall board and the vertical steel bars 81 of the outer layer steel bar net sheet are pre-inserted in the marked position of the outer wall column 29, and an outer wall column construction joint is arranged at the height of 450 mm from the plane of the raft 3. The outer wall column 29 below the construction joint is a guide wall 28. The distance between the upper plane of the guide wall 28 and the upper plane of the raft 3 is 450 mm, and a split bolt 5 with a water stop wing ring is arranged on an outer wall column template at the position, 200 mm away from the raft surface, of the upper plane of the guide wall 28, so that the guide wall template, namely the outer wall column template, is reinforced. And a water stop steel plate 6 is arranged in the middle of the construction joint (namely the upper plane of the guide wall). The guide wall divides the underground structure into an inner area and an outer area; after the concrete pouring of the raft and the guide wall is completed, throwing out (pre-inserting out the upper plane of the guide wall) the vertical steel bars 71 of the inner layer steel bar meshes and the vertical steel bars 81 of the outer layer steel bar meshes of the outer wall plate; in order to protect the waterproof layer 21 under the raft, a waterproof protective layer 22 is arranged on the concrete cushion layer 2 beyond the scope of the raft 3 and the waterproof layer 21 paved on the concrete cushion layer; the vertical steel bars 71 of the inner layer steel bar net sheet of the external wall panel are respectively connected with the vertical steel bars 71 to form inner row vertical steel bars, the vertical steel bars 81 of the outer layer steel bar net sheet are connected with the vertical steel bars 81 to form close-fitting outer row vertical steel bars, then the horizontal steel bars 10 are arranged outside the inner row vertical steel bars (by the basement), the horizontal steel bars 9 are arranged outside the outer row vertical steel bars (by the basement), the double-layer steel bar net sheet of the external wall column is formed, the ladder bars and the drag hook bars are arranged inside the double-layer steel bar net sheet, and the protection cushion blocks are arranged on the steel bar net sheet. Wall post is from raft face 450 mm's advantage of construction joint: a. a water-stopping steel plate belt with the thickness of-3 multiplied by 300 mm is usually designed at the position of wall column concrete "blocking, (namely, the water-stopping steel plate belt with the thickness of 150 mm is embedded in the cast-in-place concrete, and the water-stopping steel plate belt with the thickness of 150 mm is also embedded in the cast-in-place concrete), so that water-stopping facilities are convenient to install; b. the construction site uses a plurality of templates of 915X 1830 mm, and the templates are divided into two templates of 457.5X 1830 mm on the 915 mm side, so that the utilization efficiency is highest; c. the distance between the water stop steel plate strip and the raft face is 300 mm, so that the reinforcement requirement after the guide wall template is installed is met.
Step two: cutting a reserved sleeve 12 meeting the design requirement according to a design drawing, welding a water stop wing ring 11 on the reserved sleeve 12 to manufacture a complete waterproof steel sleeve, and then carrying out pre-buried fixing work of the waterproof reserved sleeve 12 on a double-layer reinforcing steel mesh of an outer wall column according to the illustrated size.
Step three: binding the reinforcement cage, and performing mold closing operation after supervision and acceptance; during die assembly, a split bolt 5 with a water stop wing ring is required to be installed on the double-layer reinforcing steel mesh; and a template 16, a template back ridge 15 and a double steel pipe keel 17 are sequentially supported on the outer side of the double-layer steel bar net sheet, a mountain-shaped clamp 18 is arranged on the double steel pipe keel 17, nuts are arranged on the split bolts 5, and the template of the outer wall column in the underground structure area is tensioned.
Step four: the scaffold tube and auxiliary parts are utilized to build a complete template supporting frame 13 in the range of the underground structure, and the template supporting frame 13 comprises a template supporting frame vertical rod, a horizontal rod and a sweeping rod. The upper part of the template support frame is sequentially paved with a keel, a back rib and a template to form a platform beam slab bottom template system 14, wherein the platform beam slab bottom template system 14 comprises the keel, the back rib and the template; and binding the platform beam slab steel bars.
Step five: and (5) according to the requirements of operation regulations, the concrete pouring of the outer wall column of the underground structure is completed.
Step six: according to the requirements of concrete construction specifications, curing the concrete of the outer wall column of the underground structure is completed; after maintenance is finished, according to the sequence of supporting before removing and supporting after removing, firstly loosening nuts of the split bolts, removing double steel pipe keels 17, template back ribs 15 and templates 16 of the vertical structure, removing the platform beam plate bottom die system 14 and the template support frame 13, and cleaning, piling and removing the removed turnover materials from the working surface.
Step seven: cleaning the structural surface of the outer wall column in the underground structural area, and repairing the defect; removing the waterproof layer 22, and rolling up the raft lower waterproof layer 21 which is thrown out (reserved) originally;
Step eight: manufacturing a special fixing frame for reserving the sleeve 12; the fixed mount is provided with a wooden baffle plate 23 which is larger than the outer diameter of the sleeve by 200 mm and can be used for only needing a numerical value of more than 200 mm, an iron pull rod 25 is fixed on the baffle plate 23, and an iron railing 24 is arranged at the end part of the iron pull rod 25.
Step nine: performing waterproof layer 19 construction according to the waterproof operation regulation requirements; and the waterproof layer 19 is wound into the reserved sleeve to form a waterproof layer 20 in the reserved sleeve, so that the waterproof quality is ensured.
Step ten: special fixing frames for installing the reserved sleeve 12, namely a wooden baffle 23, a railing 24 and a pull rod 25, are arranged, and attention is paid to: the waterproof layer 19 cannot be damaged by the installation of the special fixing frame; one end of the fixing frame is provided with a wooden baffle plate, the wooden baffle plate is contacted with the waterproof material, so that the waterproof material is not damaged, and the special fixing frame is fixed with proper force, and the special fixing frame is not loosened after being installed.
Step eleven: a waterproof roll 191 is added on the baffle side of the special fixing frame for reserving the position of the sleeve 12 and is connected with the waterproof layer 19.
Step twelve: and backfilling and tamping earthwork in layers according to the requirement of backfilling the earthwork of the foundation pit until the designed elevation is reached.
Step thirteen: before the pipeline construction outside the underground structure range, trench earthwork excavation is carried out according to the pre-buried positions of the water stop wing ring 11 and the reserved sleeve 12, the pipe orifice position of the reserved sleeve 12 is exposed, and the water-proof coiled material 191 is cleaned.
Step fourteen: the raised portion of the waterproof roll 191 is scored into a cross line and the waterproof roll 191 is gently torn until the need for removal of the baffle 23 is satisfied.
Fifteen steps: the connection between the pull rod 25 and the railing 24 at the inner side of the underground structure is released, and the baffle plate 23 of the special fixing frame of the reserved sleeve is taken out.
Step sixteen: the surplus waterproof roll 191 is cut off.
Seventeenth step: according to the operation rules, a connecting pipe 26 of a waterproof sleeve which penetrates through the outer wall surface in the underground structure area and is used for communicating the inner pipeline of the underground structure with the municipal pipeline is arranged, a waterproof material 27 is arranged at a gap between the inner wall of the reserved sleeve 12 and the outer wall of the connecting pipe 26 for filling, and the condition that the external joint of the pipeline is not leaked is ensured.
Eighteenth step: and (3) completing external pipelines and the like, and backfilling the trench soil according to the operation procedure requirements after the compaction test is qualified.
The invention not only solves the requirement of backfilling the earthwork of the fertilizer tank after the basement structure is completed, but also avoids the leakage of the backfilling earthwork, rainwater and the like outside the basement structure into the room; meanwhile, the damage to the waterproof layer of the column wall of the outer wall in the underground structure area can be avoided during the earth construction of the groove of the later connecting pipeline, the construction is convenient, the materials are saved, the labor consumption is reduced, the cost is reduced, and the quality is guaranteed.
Claims (3)
1. A construction process for simply plugging an outer wall reserved sleeve in an underground structure area is characterized by comprising the following steps of:
The method comprises the following steps:
Step one: sequentially completing foundation pit earthwork excavation according to a construction rule of an underground structure to form a foundation pit bottom elevation line (1) and a side slope control line (4), sequentially completing concrete cushion layer (2) pouring, raft lower waterproof layer laying and raft (3) steel bar binding, calibrating an outer wall column (29) position on steel bars of the raft (3), and pre-inserting vertical steel bars (71) of an inner layer steel bar net sheet of a plane outer wall plate and vertical steel bars (81) of an outer layer steel bar net sheet on the calibrated outer wall column position; an outer wall column construction joint is arranged on the upper plane of the raft (3), and an outer wall column (29) below the construction joint is a guide wall (28); a split bolt (5) with a water stop wing ring is arranged on the guide wall (28), and a water stop steel plate (6) is vertically arranged in the middle of the upper plane of the guide wall; the outer wall column divides the underground structure into an inner region and an outer region; a waterproof protection layer (22) is arranged on the concrete cushion layer (2) beyond the scope of the raft (3) and a waterproof layer paved on the concrete cushion layer; respectively connecting inner-row vertical steel bars (7) of the vertical steel bars on the inner-layer steel bar meshes of the external wall panel in sequence to form inner-row vertical steel bars, connecting outer-row vertical steel bars (8) of the vertical steel bars on the vertical steel bars (81) of the outer-layer steel bar meshes to form outer-row vertical steel bars, then installing horizontal inner-row steel bars (10) on the outer sides of the inner-row vertical steel bars, installing horizontal outer-row steel bars (9) on the outer sides of the outer-row vertical steel bars to form double-layer steel bar meshes of the external wall column, internally installing ladder steel bars and drag hook steel bars, and installing protection cushion blocks on the steel bar meshes;
Step two: cutting a reserved sleeve (12) according to a design drawing, welding a water-stopping wing ring (11) on the reserved sleeve (12), manufacturing a complete waterproof steel sleeve, and performing pre-buried fixing work of the waterproof reserved sleeve (12) on a double-layer reinforcing steel mesh of an outer wall column;
Step three: binding the reinforcement cage, and performing mold closing operation after supervision and acceptance; during die assembly, a split bolt (5) with a water stop wing ring is required to be installed on the double-layer reinforcing steel mesh; the outer sides of the double-layer reinforcing steel meshes are sequentially supported with a template (16), a template back rib (15) and double steel pipe keels (17), mountain-shaped clamps (18) are arranged on the double steel pipe keels (17), nuts are arranged on the split bolts (5), and the template of an outer wall column in the underground structure area is tensioned;
step four: setting up a complete template support frame (13) by using scaffold pipes and auxiliary parts in the range of the underground structure; the upper part of the template support frame is sequentially paved with a keel, a back rib and a template to form a platform beam slab bottom die system (14); binding platform beam slab steel bars;
step five: according to the requirements of operation regulations, the concrete pouring of the outer wall column of the underground structure is completed;
Step six: according to the requirements of concrete construction specifications, curing the concrete of the outer wall column of the underground structure is completed; after maintenance is finished, loosening nuts of split bolts, removing double steel pipe keels (17), template back ribs (15) and templates (16) of a vertical structure according to the sequence of supporting before removing and supporting after removing, removing a platform beam plate bottom die system (14) and a template support frame (13), and cleaning, piling and removing the removed turnover materials from a working surface;
step seven: cleaning the structural surface of the outer wall column in the underground structural area, and repairing the defect; removing the waterproof layer (22), and rolling up the raft lower waterproof layer (21) reserved originally;
Step eight: manufacturing a fixing frame of a reserved sleeve (12); the fixed mount is provided with a wooden baffle plate (23) with the outer diameter larger than 200mm of the sleeve, an iron pull rod (25) is fixed on the baffle plate (23), and an iron railing (24) is arranged at the end part of the iron pull rod (25);
step nine: performing waterproof layer construction according to the waterproof operation rule requirements; the waterproof layer is rolled into the reserved sleeve to form the waterproof layer in the reserved sleeve;
Step ten: a fixed frame for reserving the position of the sleeve (12) is arranged;
step eleven: a waterproof coiled material (191) is added on the baffle side of the fixing frame at the position of the reserved sleeve (12) and is connected with the waterproof layer;
step twelve: backfilling and tamping earthwork in layers according to the requirement of backfilling the earthwork of the foundation pit until the designed elevation is reached;
Step thirteen: before the pipeline construction outside the underground structure range, trench earthwork excavation is carried out according to the pre-buried positions of the water stop wing ring (11) and the reserved sleeve (12), the pipe orifice position of the reserved sleeve (12) is exposed, and the reserved sleeve is cleaned to a waterproof coiled material (191);
step fourteen: marking cross lines on the convex parts of the waterproof coiled materials (191), and tearing the waterproof coiled materials (191) until the requirements of taking out the baffle plates (23) are met;
fifteen steps: releasing the connection between the pull rod (25) and the railing (24) at the inner side of the underground structure, and taking out the baffle (23) of the fixing frame of the reserved sleeve;
Step sixteen: cutting off the redundant waterproof coiled material (191);
seventeenth step: according to the operation rules, a connecting pipe (26) penetrating through the waterproof reserved sleeve (12) of the outer wall surface in the underground structure area is installed; and performing waterproof sealing treatment;
eighteenth step: and (3) finishing the external pipeline, and backfilling the trench soil according to the operation procedure requirement after the external pipeline is qualified through the compression test.
2. The construction process for simply plugging an outer wall reserved sleeve in an underground structure area according to claim 1, which is characterized in that: and step nine, the waterproof layer is rolled into the reserved sleeve (12) to form a waterproof layer in the steel sleeve.
3. The construction process for simply plugging an outer wall reserved sleeve in an underground structure area according to claim 1, which is characterized in that: in the seventeenth step, a waterproof material (27) is arranged at a gap between the inner wall of the reserved sleeve (12) and the outer wall of the connecting pipe (26).
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| CN113585292A (en) * | 2021-08-25 | 2021-11-02 | 江苏南通三建集团股份有限公司 | Construction process for preventing underground structure from floating when earth is backfilled |
| CN113653104A (en) * | 2021-08-25 | 2021-11-16 | 中国建筑第八工程局有限公司 | Waterproof structure at underground wall and construction method thereof |
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