WO2023056984A1 - Waterproof structure and construction method for foundation pit support - Google Patents

Waterproof structure and construction method for foundation pit support Download PDF

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Publication number
WO2023056984A1
WO2023056984A1 PCT/CN2022/126863 CN2022126863W WO2023056984A1 WO 2023056984 A1 WO2023056984 A1 WO 2023056984A1 CN 2022126863 W CN2022126863 W CN 2022126863W WO 2023056984 A1 WO2023056984 A1 WO 2023056984A1
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WIPO (PCT)
Prior art keywords
basement
wall
foundation pit
construction method
underground continuous
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PCT/CN2022/126863
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French (fr)
Inventor
Zhengji Li
Chao WAN
Zhaohui Cai
Xuan XU
Hao Tang
Xiuyan WANG
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China Construction Seventh Engineering Division Corp., Ltd.
China Construction Sixth Engineering Bureau Corp., Ltd.
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Application filed by China Construction Seventh Engineering Division Corp., Ltd., China Construction Sixth Engineering Bureau Corp., Ltd. filed Critical China Construction Seventh Engineering Division Corp., Ltd.
Publication of WO2023056984A1 publication Critical patent/WO2023056984A1/en

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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
    • 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

Definitions

  • the invention relates to the field of construction engineering, in particular to a waterproof structure and construction method of foundation pit support.
  • Subway is an important means of transportation in urban transportation network.
  • the excavated foundation pit is protected by the continuous wall and internal support.
  • the internal support adopts the form of reinforced concrete column. After the construction of the outer wall of the basement, the support is replaced and the internal support is removed. The construction steps are more, the construction period is longer, more materials are required, resulting in waste, and so huge human and material resources are needed.
  • the reinforced concrete basement exterior wall structures such as "two wall superposition type” and “two wall combination type” can solve the problem of support removal and replacement, but due to the influence of temperature difference, concrete shrinkage and water and soil pressure, as well as various factors such as design, materials, concrete mix proportion and construction, according to the investigation, a large number of basement exterior wall structures have vertical and oblique through cracks and water leakage, which is difficult to repair in the later stage High cost.
  • the invention aims to overcome various defects of the prior art and provide a waterproof structure and construction method of foundation pit support.
  • the outer wall of the basement of the building has better waterproof and crack resistance, and the basement floor is more flat.
  • the invention provides a waterproof structure, which is used for the waterproof of foundation pit support
  • the foundation pit is provided with an underground continuous wall, wherein the wall surface of the underground continuous wall is close to the basement-outer-wall, the lower end of the basement-outer-wall is connected with the basement-bottom-plate, and the basement-bottom-plate and the basement-outer-wall are formed into an integrated structure by pouring and solidification
  • the basement-bottom-plate is provided with a flexible coiled material layer for waterproofing, that is, the basement-bottom-plate, the basement-outer-wall and the flexible coiled material layer jointly form a waterproof structure.
  • the continuous wall in the foundation pit support as a part of the side wall of the basement not only thins the outer wall of the basement, but also directly uses the continuous wall as the outer formwork of the basement floor, basement floor slab and basement outer wall, so that the expansion force of the concrete of the basement floor, basement floor slab and basement outer wall is effectively resisted in the process of pouring and setting.
  • the basement floor There is no exposed part on the outside of the basement floor slab and basement exterior wall concrete, so that the concrete is in a good curing state, and then the basement floor slab, basement floor slab and exterior wall concrete are not easy to crack.
  • the flexible coiled material is laid at the bottom of the foundation pit to form a flexible coiled material layer.
  • the flexible pre laid anti adhesive coiled material reduces the binding effect of the bottom of the foundation pit on the hydration heat of the mass concrete of the basement floor, provides a deformable space for the concrete at the bottom of the basement floor, makes the formed basement floor more flat, reduces the cracking of the basement floor, and the underground continuous wall restricts the hydration heat of the concrete forming the basement floor, Improve the structural strength of the outer wall of the basement, so it can avoid the protective layer, reduce the process and save man hours.
  • the waterproof structure comprises a concealed beam for reinforcement, which is horizontally arranged in the basement-outer-wall.
  • the waterproof structure comprises a plurality of beam reinforcements horizontally laid in the concealed beam.
  • the concealed beam plays a good role of formwork hoop on the basement-outer-wall.
  • the beam reinforcement offsets the horizontal stress of the concrete, improves the crack resistance of the outer wall structure of the basement and controls the expansion of cracks.
  • the invention is further arranged that the beam reinforcement is laid corresponding to the height of the basement floor slab.
  • Setting concealed beams at the height corresponding to the floor slab of the basement can improve the structural strength of the connecting nodes and the structural strength of the basement at the same time.
  • the invention also provides a construction method of the waterproof structure above mentioned, which is constructed in the foundation pit with an underground continuous wall, comprising steps as follows:
  • An inner formwork is erected on the inner side of the underground continuous wall to the foundation pit, and the inner formwork is parallel to the underground continuous wall and maintains a fixed spacing;
  • the step (3) also includes a concealed beams erecting in the horizontal direction in the basement-outer-wall.
  • the concealed beam is formed by pouring concrete after laying a plurality of beam reinforcements.
  • the concealed beam is formed by pouring concrete into the beam reinforcement between the underground continuous wall and the inner formwork after it is poured and formed on the outer wall of the basement.
  • the reinforcement process is for the inner formwork: implant formwork reinforcement into the underground continuous wall, and the formwork reinforcement passes through the inner formwork and is fixed on the inner formwork with nuts and mountain shaped clamps. Reinforce the inner formwork to improve the cracking resistance of the inner formwork.
  • the inner formwork is staggered and overlapped with the inner and outer double layers, which can further improve the cracking resistance of the inner formwork, thereby reducing the probability of future cracking of the outer wall of the basement.
  • the invention can also set an inclined support between the inner formwork and the bottom of the foundation pit to improve the compressive capacity of the inner formwork, which is a conventional technical means, and will not be repeated here.
  • the flexible coiled materials are flexible pre laid anti stick waterproof coiled materials.
  • the materials can improve the waterproof strength of basement floor, and are preferably polymer self-adhesive membrane waterproof coiled materials.
  • the underground continuous wall in the foundation pit support is used as a part of the side wall of the basement, so that the basement-outer-wall and the underground continuous wall form a composite wall structure.
  • the flexible pre laid anti stick waterproof coiled materials are paved on the side of the underground continuous wall close to the foundation pit, and the underground continuous wall is used as the outer formwork to avoid the rapid decline of the edge temperature gradient.
  • the beam reinforcement counteracts the horizontal stress of the concrete, improves the crack resistance of the basement-outer-wall, and the flexible pre laid anti stick waterproof coiled materials reduce the restraint effect of the bottom of the foundation pit on the hydration heat of the mass concrete of the basement floor, making the basement floor more flat.
  • the underground continuous wall not only thins the basement-outer-wall, but also effectively resists the expansion force of the concrete of the basement floor, floor slab and outer wall during the pouring and setting process, which greatly reduces the tensile stress of the concrete in the later stage;
  • Concealed beams counteract the horizontal stress of concrete, improve the crack resistance of basement-outer-wall structure and control the expansion of cracks;
  • the flexible coiled materials reduces the restraint effect of the bottom of the foundation pit on the hydration heat of the mass concrete of the basement floor, making the formed basement floor more flat.
  • Fig. 1 is the structural diagram of the waterproof structure of the foundation pit support of the invention
  • Fig. 2 is the schematic diagram of the relationship between the inner formwork and the underground continuous wall in the construction method of the waterproof structure
  • Fig. 3 is an enlarged schematic diagram of part ‘A’ in Fig. 2;
  • Fig. 4 is a top view of the relationship between adjacent inner formworks in the construction method of the waterproof structure.
  • Attached symbols 1-underground continuous wall; 2-inner formwork; 3-basement-outer-wall; 4-beam reinforcement; 5-concealed beam; 6-basement floor slab; 7-flexible coiled materials; 8-formwork reinforcement; 9-mountain shaped clamp; 10-nuts; 11-inclined support; 12-basement-bottom-plate; 13-flexible coiled material layer; 14-water stop.
  • this embodiment provides a waterproof structure used for the waterproof of foundation pit support
  • the foundation pit is provided with an underground continuous wall 1, wherein the wall surface of the underground continuous wall 1 is close to the basement-outer-wall 3, the lower end of the basement-outer-wall 3 is connected with the basement-bottom-plate 12, and the basement-bottom-plate 12 and the basement-outer-wall 3 are formed into an integrated structure by pouring and solidification
  • the basement-bottom-plate 12 is provided with a flexible coiled material layer 13 for waterproofing, that is, the basement-bottom-plate 12, the basement-outer-wall 3 and the flexible coiled material layer 13 jointly form a waterproof structure.
  • a concealed beam 5 for reinforcement is horizontally arranged in the basement-outer-wall 3, and the concealed beam 5 contains a plurality of horizontally laid beam reinforcement 4s.
  • Water stop 14 is installed on formwork reinforcement 8.
  • this embodiment provides a construction method of the waterproof structure in embodiment 1, and the steps are as follows:
  • the inner formwork 2 is set up on the inner side of the underground continuous wall 1 to the foundation pit.
  • the inner formwork 2 is parallel to the underground continuous wall 1 and maintains a fixed spacing.
  • the inner formwork 2 is staggered and overlapped with the inner and outer double layers;
  • Flexible coiled materials 7 lay at the bottom of the foundation pit; flexible coiled materials 7 are flexible pre laid anti stick waterproof coiled materials.
  • the materials can improve the waterproof strength of basement floor 12, and are preferably polymer self-adhesive membrane waterproof coiled materials.
  • the outer wall of the basement formed by pouring concrete between the continuous wall and the inner formwork 2; after the outer wall of the basement is poured and formed, the beam reinforcement 4 is laid on the basement-outer-wall 3 along the horizontal direction, and then the concrete is poured to the beam reinforcement 4 to form a concealed beam 5.
  • the inner formwork 2 is removed to obtain a waterproof structure composed of basement-bottom-plate 12, basement-outer-wall and flexible coiled materials layer 13.

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  • Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Environmental & Geological Engineering (AREA)
  • Hydrology & Water Resources (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Mining & Mineral Resources (AREA)
  • Paleontology (AREA)
  • Civil Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Structural Engineering (AREA)
  • Underground Structures, Protecting, Testing And Restoring Foundations (AREA)

Abstract

The invention discloses a waterproof structure and a construction method of foundation pit support. Using the continuous wall in the foundation pit support as a part of the side wall of the basement not only thins the outer wall of the basement, but also directly uses the continuous wall as the outer formwork of the basement floor, basement floor slab and basement outer wall, so that the expansion force of them are effectively resisted in the process of pouring and setting. The flexible coiled material layer reduces the binding effect of the bottom of the foundation pit on the hydration heat of the mass concrete of the basement floor, provides a deformable space for the concrete at the bottom of the basement floor, makes the formed basement floor more flat, improve the structural strength of the outer wall of the basement, so it can avoid the protective layer, reduce the process and save man hours.

Description

Waterproof structure and construction method for Foundation Pit Support Technical Field
The invention relates to the field of construction engineering, in particular to a waterproof structure and construction method of foundation pit support.
Background
Subway is an important means of transportation in urban transportation network. At present, in order to ensure the safety of construction, during the construction of buildings close to the subway, the excavated foundation pit is protected by the continuous wall and internal support. The internal support adopts the form of reinforced concrete column. After the construction of the outer wall of the basement, the support is replaced and the internal support is removed. The construction steps are more, the construction period is longer, more materials are required, resulting in waste, and so huge human and material resources are needed.
At present, the reinforced concrete basement exterior wall structures such as "two wall superposition type" and "two wall combination type" can solve the problem of support removal and replacement, but due to the influence of temperature difference, concrete shrinkage and water and soil pressure, as well as various factors such as design, materials, concrete mix proportion and construction, according to the investigation, a large number of basement exterior wall structures have vertical and oblique through cracks and water leakage, which is difficult to repair in the later stage High cost.
Summary
The invention aims to overcome various defects of the prior art and provide a waterproof structure and construction method of foundation pit support. The  outer wall of the basement of the building has better waterproof and crack resistance, and the basement floor is more flat.
In order to achieve the above purpose, the invention provides a waterproof structure, which is used for the waterproof of foundation pit support, the foundation pit is provided with an underground continuous wall, wherein the wall surface of the underground continuous wall is close to the basement-outer-wall, the lower end of the basement-outer-wall is connected with the basement-bottom-plate, and the basement-bottom-plate and the basement-outer-wall are formed into an integrated structure by pouring and solidification, the basement-bottom-plate is provided with a flexible coiled material layer for waterproofing, that is, the basement-bottom-plate, the basement-outer-wall and the flexible coiled material layer jointly form a waterproof structure.
Using the continuous wall in the foundation pit support as a part of the side wall of the basement not only thins the outer wall of the basement, but also directly uses the continuous wall as the outer formwork of the basement floor, basement floor slab and basement outer wall, so that the expansion force of the concrete of the basement floor, basement floor slab and basement outer wall is effectively resisted in the process of pouring and setting. At the same time, the basement floor There is no exposed part on the outside of the basement floor slab and basement exterior wall concrete, so that the concrete is in a good curing state, and then the basement floor slab, basement floor slab and exterior wall concrete are not easy to crack. The flexible coiled material is laid at the bottom of the foundation pit to form a flexible coiled material layer. The flexible pre laid anti adhesive coiled material reduces the binding effect of the bottom of the foundation pit on the hydration heat of the mass concrete of the basement floor, provides a deformable space for the concrete at the bottom of the basement floor, makes the formed basement floor more flat, reduces the cracking of the basement floor, and the underground continuous wall restricts the hydration heat of the concrete forming the basement floor, Improve the structural strength of the outer wall of the basement, so it can avoid the protective layer, reduce the process and save man hours.
In some embodiments, the waterproof structure comprises a concealed  beam for reinforcement, which is horizontally arranged in the basement-outer-wall.
Further, the waterproof structure comprises a plurality of beam reinforcements horizontally laid in the concealed beam.
The concealed beam plays a good role of formwork hoop on the basement-outer-wall. In the process of concrete setting of the basement-outer-wall, the beam reinforcement offsets the horizontal stress of the concrete, improves the crack resistance of the outer wall structure of the basement and controls the expansion of cracks.
The invention is further arranged that the beam reinforcement is laid corresponding to the height of the basement floor slab. Setting concealed beams at the height corresponding to the floor slab of the basement can improve the structural strength of the connecting nodes and the structural strength of the basement at the same time.
The invention also provides a construction method of the waterproof structure above mentioned, which is constructed in the foundation pit with an underground continuous wall, comprising steps as follows:
(1) An inner formwork is erected on the inner side of the underground continuous wall to the foundation pit, and the inner formwork is parallel to the underground continuous wall and maintains a fixed spacing;
(2) Flexible coiled materials are laid at the bottom of the foundation pit;
(3) The basement-outer-wall formed by pouring concrete between the underground continuous wall and the inner formwork;
(4) Then the flexible coiled materials are poured with concrete to form the basement floor;
(5) The inner formwork is removed to obtain a waterproof structure composed of basement-bottom-plate, basement-outer-wall and layer of flexible coiled materials.
In some embodiments of the construction method, the step (3) also includes  a concealed beams erecting in the horizontal direction in the basement-outer-wall.
In some embodiments of the construction method, the concealed beam is formed by pouring concrete after laying a plurality of beam reinforcements. The concealed beam is formed by pouring concrete into the beam reinforcement between the underground continuous wall and the inner formwork after it is poured and formed on the outer wall of the basement.
In some embodiments of the construction method, comprising reinforcement process before pouring concrete in the step (3) , the reinforcement process is for the inner formwork: implant formwork reinforcement into the underground continuous wall, and the formwork reinforcement passes through the inner formwork and is fixed on the inner formwork with nuts and mountain shaped clamps. Reinforce the inner formwork to improve the cracking resistance of the inner formwork.
Preferably, the inner formwork is staggered and overlapped with the inner and outer double layers, which can further improve the cracking resistance of the inner formwork, thereby reducing the probability of future cracking of the outer wall of the basement.
In order to facilitate construction, the invention can also set an inclined support between the inner formwork and the bottom of the foundation pit to improve the compressive capacity of the inner formwork, which is a conventional technical means, and will not be repeated here.
In some embodiments of the construction method, the flexible coiled materials are flexible pre laid anti stick waterproof coiled materials. The materials can improve the waterproof strength of basement floor, and are preferably polymer self-adhesive membrane waterproof coiled materials.
When adopting the above construction method, the underground continuous wall in the foundation pit support is used as a part of the side wall of the basement, so that the basement-outer-wall and the underground continuous wall form a composite wall structure. The flexible pre laid anti stick waterproof coiled materials are paved on the side of the underground continuous wall close  to the foundation pit, and the underground continuous wall is used as the outer formwork to avoid the rapid decline of the edge temperature gradient. In the process of concrete condensation of the basement-outer-wall, The beam reinforcement counteracts the horizontal stress of the concrete, improves the crack resistance of the basement-outer-wall, and the flexible pre laid anti stick waterproof coiled materials reduce the restraint effect of the bottom of the foundation pit on the hydration heat of the mass concrete of the basement floor, making the basement floor more flat.
The Beneficial Effects of the Invention:
1. As a part of the side wall of the basement, the underground continuous wall not only thins the basement-outer-wall, but also effectively resists the expansion force of the concrete of the basement floor, floor slab and outer wall during the pouring and setting process, which greatly reduces the tensile stress of the concrete in the later stage;
2. Using the underground continuous wall as the external formwork avoids the rapid decline of the edge temperature gradient, so that the basement-outer-wall concrete is in a good curing state;
3. Concealed beams counteract the horizontal stress of concrete, improve the crack resistance of basement-outer-wall structure and control the expansion of cracks;
4. The flexible coiled materials reduces the restraint effect of the bottom of the foundation pit on the hydration heat of the mass concrete of the basement floor, making the formed basement floor more flat.
Brief Description of the Drawings
Fig. 1 is the structural diagram of the waterproof structure of the foundation pit support of the invention;
Fig. 2 is the schematic diagram of the relationship between the inner formwork and the underground continuous wall in the construction method of the waterproof structure;
Fig. 3 is an enlarged schematic diagram of part ‘A’ in Fig. 2;
Fig. 4 is a top view of the relationship between adjacent inner formworks in the construction method of the waterproof structure.
Attached symbols: 1-underground continuous wall; 2-inner formwork; 3-basement-outer-wall; 4-beam reinforcement; 5-concealed beam; 6-basement floor slab; 7-flexible coiled materials; 8-formwork reinforcement; 9-mountain shaped clamp; 10-nuts; 11-inclined support; 12-basement-bottom-plate; 13-flexible coiled material layer; 14-water stop.
Detailed Description of the Embodiments
The invention is further described in detail below in combination with the accompanying drawings and specific embodiments. The following embodiments are implemented on the premise of the technical scheme of the invention, and the detailed implementation mode and specific operation process are given, but the protection scope of the invention is not limited to the following embodiments.
Example 1
As shown in Figure 1, this embodiment provides a waterproof structure used for the waterproof of foundation pit support, the foundation pit is provided with an underground continuous wall 1, wherein the wall surface of the underground continuous wall 1 is close to the basement-outer-wall 3, the lower end of the basement-outer-wall 3 is connected with the basement-bottom-plate 12, and the basement-bottom-plate 12 and the basement-outer-wall 3 are formed into an integrated structure by pouring and solidification, the basement-bottom-plate 12 is provided with a flexible coiled material layer 13 for waterproofing, that is, the basement-bottom-plate 12, the basement-outer-wall 3 and the flexible coiled material layer 13 jointly form a waterproof structure. A concealed beam 5 for reinforcement is horizontally arranged in the basement-outer-wall 3, and the concealed beam 5 contains a plurality of horizontally laid beam reinforcement 4s. Water stop 14 is installed on formwork reinforcement 8.
Example 2
As shown in figures 2 to 4, this embodiment provides a construction method of the waterproof structure in embodiment 1, and the steps are as follows:
(1) The inner formwork 2 is set up on the inner side of the underground continuous wall 1 to the foundation pit. The inner formwork 2 is parallel to the underground continuous wall 1 and maintains a fixed spacing. The inner formwork 2 is staggered and overlapped with the inner and outer double layers;
(2) Flexible coiled materials 7 lay at the bottom of the foundation pit; flexible coiled materials 7 are flexible pre laid anti stick waterproof coiled materials. The materials can improve the waterproof strength of basement floor 12, and are preferably polymer self-adhesive membrane waterproof coiled materials.
(3) Reinforce the inner formwork 2, and implant formwork reinforcement 8 into the underground continuous wall 1. The formwork reinforcement 8 passes through the inner formwork 2 and is sleeved with a mountain shaped clamp 9, and screw in the formwork reinforcement 8 with nuts 10 to hold the mountain shaped clamp 9 against the inner formwork 2.
The outer wall of the basement formed by pouring concrete between the continuous wall and the inner formwork 2; after the outer wall of the basement is poured and formed, the beam reinforcement 4 is laid on the basement-outer-wall 3 along the horizontal direction, and then the concrete is poured to the beam reinforcement 4 to form a concealed beam 5.
(4) Then pour concrete on the flexible coiled materials 7 to form the basement floor 12;
(5) The inner formwork 2 is removed to obtain a waterproof structure composed of basement-bottom-plate 12, basement-outer-wall and flexible coiled materials layer 13.
Those skilled in the art can better understand and master the invention with the help of embodiments. However, the scope of protection and claims of the  invention is not limited to the provided cases. Based on the embodiments in the invention, all other embodiments obtained by those skilled in the art without creative labor belong to the scope of the invention.

Claims (9)

  1. A waterproof structure, which is used for the waterproof of foundation pit support, the foundation pit is provided with an underground continuous wall, wherein the wall surface of the underground continuous wall is close to the basement-outer-wall, the lower end of the basement-outer-wall is connected with the basement-bottom-plate, and the basement-bottom-plate and the basement-outer-wall are formed into an integrated structure by pouring and solidification, the basement-bottom-plate is provided with a flexible coiled material layer for waterproofing, that is, the basement-bottom-plate, the basement-outer-wall and the flexible coiled material layer jointly form a waterproof structure.
  2. The waterproof structure according to claim 1, comprising a concealed beam for reinforcement, which is horizontally arranged in the basement-outer-wall.
  3. The waterproof structure according to claim 2, comprising a plurality of beam reinforcements horizontally laid in the concealed beam.
  4. The construction method of the waterproof structure of claim 1, which is constructed in the foundation pit with an underground continuous wall, comprising steps as follows:
    (1) an inner formwork is erected on the inner side of the underground continuous wall to the foundation pit, and the inner formwork is parallel to the underground continuous wall and maintains a fixed spacing;
    (2) flexible coiled materials are laid at the bottom of the foundation pit;
    (3) the basement-outer-wall formed by pouring concrete between the underground continuous wall and the inner formwork;
    (4) then the flexible coiled materials are poured with concrete to form the basement floor;
    (5) the inner formwork is removed to obtain a waterproof structure composed of basement-bottom-plate, basement-outer-wall and layer of flexible  coiled materials.
  5. The construction method according to claim 4, wherein the step (3) also includes a concealed beams erecting in the horizontal direction in the basement-outer-wall.
  6. The construction method according to claim 5, wherein the concealed beam is formed by pouring concrete after laying a plurality of beam reinforcements.
  7. The construction method according to claim 6, comprising reinforcement process before pouring concrete in the step (3) , the reinforcement process is for the inner formwork: implant formwork reinforcement into the underground continuous wall, and the formwork reinforcement passes through the inner formwork and is fixed on the inner formwork with nuts and mountain shaped clamps.
  8. The construction method according to any one of claims 4-7, wherein the inner formwork is staggered and overlapped with the inner and outer double layers.
  9. The construction method according to claim 4, wherein the flexible coiled materials are flexible pre laid anti stick waterproof coiled materials.
PCT/CN2022/126863 2022-06-04 2022-10-22 Waterproof structure and construction method for foundation pit support WO2023056984A1 (en)

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CN116497881A (en) * 2023-06-26 2023-07-28 中铁建工集团有限公司 Basement bottom plate and outer wall waterproof structure and construction method
CN116518911A (en) * 2023-07-03 2023-08-01 北京城建勘测设计研究院有限责任公司天津分公司 Foundation pit support structure deformation monitoring device
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CN117488880A (en) * 2023-11-23 2024-02-02 中国华西企业股份有限公司 Large-span linked basement deformation joint seepage-proofing structure

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JPH10280434A (en) * 1997-03-31 1998-10-20 Kazutoshi Torisawa Construction method for basement under application of outside waterproofing
JPH1181345A (en) * 1997-09-04 1999-03-26 Misawa Homes Co Ltd Construction method for basement structure and basement room
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CN117107801B (en) * 2023-10-18 2024-02-06 青岛亿联建设集团股份有限公司 Horizontal support structure reserved type basement exterior wall and construction method thereof
CN117488880A (en) * 2023-11-23 2024-02-02 中国华西企业股份有限公司 Large-span linked basement deformation joint seepage-proofing structure
CN117488880B (en) * 2023-11-23 2024-05-28 中国华西企业股份有限公司 Large-span linked basement deformation joint seepage-proofing structure

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