CN110685284A - Foundation pit seepage-proofing structure and construction method thereof - Google Patents
Foundation pit seepage-proofing structure and construction method thereof Download PDFInfo
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- CN110685284A CN110685284A CN201910949787.9A CN201910949787A CN110685284A CN 110685284 A CN110685284 A CN 110685284A CN 201910949787 A CN201910949787 A CN 201910949787A CN 110685284 A CN110685284 A CN 110685284A
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- waterproof layer
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- 238000010276 construction Methods 0.000 title claims abstract description 10
- 239000004567 concrete Substances 0.000 claims abstract description 30
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 19
- 230000002265 prevention Effects 0.000 claims abstract description 11
- 238000009412 basement excavation Methods 0.000 claims abstract description 7
- 230000003014 reinforcing effect Effects 0.000 claims description 11
- 238000005260 corrosion Methods 0.000 claims 2
- 239000010410 layer Substances 0.000 description 67
- 238000000034 method Methods 0.000 description 5
- 102000001999 Transcription Factor Pit-1 Human genes 0.000 description 4
- 108010040742 Transcription Factor Pit-1 Proteins 0.000 description 4
- 239000002131 composite material Substances 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 239000011241 protective layer Substances 0.000 description 3
- 101150054854 POU1F1 gene Proteins 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 239000002689 soil Substances 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000008014 freezing Effects 0.000 description 1
- 238000007710 freezing Methods 0.000 description 1
- 239000003673 groundwater Substances 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 239000011150 reinforced concrete Substances 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 238000004078 waterproofing Methods 0.000 description 1
Images
Classifications
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- 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
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D19/00—Keeping dry foundation sites or other areas in the ground
- E02D19/06—Restraining of underground water
- E02D19/12—Restraining of underground water by damming or interrupting the passage of underground water
- E02D19/18—Restraining of underground water by damming or interrupting the passage of underground water by making use of sealing aprons, e.g. diaphragms made from bituminous or clay material
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D5/00—Bulkheads, piles, or other structural elements specially adapted to foundation engineering
- E02D5/18—Bulkheads or similar walls made solely of concrete in situ
- E02D5/182—Bulkheads or similar walls made solely of concrete in situ using formworks to separate sections
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D2250/00—Production methods
- E02D2250/0007—Production methods using a mold
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D2250/00—Production methods
- E02D2250/0023—Cast, i.e. in situ or in a mold or other formwork
Abstract
The invention relates to the technical field of foundation pit water seepage prevention, in particular to a construction method for foundation pit water seepage prevention, which has the technical scheme that: excavation supporting pit is arranged at the periphery of the foundation pit, an embedded groove is formed in the bottom of the supporting pit, two temporary supporting guard plates are arranged on two side walls of the embedded groove respectively, waterproof concrete is poured between the two temporary supporting guard plates to form a waterproof layer, after the waterproof layer is initially set, the temporary supporting guard plates are taken down, common concrete is poured on two sides of the waterproof layer in the foundation pit to form supporting guard layers, and the foundation pit is excavated after the supporting layers are initially set. Has the advantages of water resistance and cost reduction.
Description
Technical Field
The invention relates to the technical field of foundation pit water seepage prevention, in particular to a foundation pit water seepage prevention structure and a construction method thereof.
Background
The foundation pit is a soil pit excavated at the design position of the foundation according to the elevation of the foundation and the plane size of the foundation. Before excavation, an excavation scheme is determined according to geological and hydrological data and the conditions of buildings nearby the site, and waterproof drainage work is performed. The person who is not excavated can use the method of putting the side slope to stabilize the earth slope, and the size of the slope is determined according to the relevant construction regulations. When a deeper foundation pit and a building adjacent to the deeper foundation pit are excavated, a foundation pit wall supporting method, a concrete-sprayed wall protecting method and a large foundation pit are used, and even an underground continuous wall and a columnar column type bored pile are used for interlocking, so that an outer soil layer is prevented from collapsing; for those who have no influence on nearby buildings, the underground water level can be reduced by a well point method, and slope releasing open cut is adopted; in cold areas, natural cold air freezing method can be adopted for excavation.
Chinese patent No. CN105113513B discloses an anti-seepage foundation pit supporting structure and a construction method thereof, wherein a vertical water intercepting layer is arranged on the side wall of a foundation pit, and a pit bottom water intercepting layer and a pit bottom counterforce pile are arranged at the bottom of the foundation pit; the vertical water intercepting layer consists of vertical concrete piles and water intercepting conforming plates; the bottom of the composite water interception plate is provided with a preset plate tip, a vertical section and a longitudinal section are respectively provided with a vertical connecting slot and a transverse connecting slot, and the side wall of the composite water interception plate is provided with a transverse stiffened plate and a vertical stiffened plate; arranging a transverse reinforcing body at the intersection of the transverse reinforcing plate and the vertical reinforcing plate; the composite water interception plate comprises three layers, namely a middle rigid reinforcing layer and two side waterproof layers; the middle rigid reinforced layer adopts a high-strength steel plate or a plastic plate or a reinforced concrete plate; the waterproof layers on the two sides are plastic plates; the middle rigid reinforcing rib layer and the waterproof layers on the two sides are connected together by adopting a sticking connection and a bolt.
The foundation pit is waterproof through the supporting structure, the waterproof of the foundation pit can be realized, and water outside the foundation pit is prevented from extending into the foundation pit.
But the prior art has the following disadvantages: waterproof concrete is required for waterproofing the support pile, and the cost of the waterproof concrete is higher than that of common concrete.
Disclosure of Invention
Aiming at the defects of the prior art, the invention aims to provide a foundation pit seepage-proofing structure and a construction method thereof. It can reduce the cost of prevention of seepage water supporting construction.
The technical purpose of the invention is realized by the following technical scheme: excavation supporting pit is arranged at the periphery of the foundation pit, an embedded groove is formed in the bottom of the supporting pit, two temporary supporting guard plates are arranged on two side walls of the embedded groove respectively, waterproof concrete is poured between the two temporary supporting guard plates to form a waterproof layer, after the waterproof layer is initially set, the temporary supporting guard plates are taken down, common concrete is poured on two sides of the waterproof layer in the foundation pit to form supporting guard layers, and the foundation pit is excavated after the supporting layers are initially set.
Through adopting above-mentioned technical scheme, use the concrete of different materials through waterproof layer and supporting layer, can reduce waterproof concrete's quantity, and then practice thrift the cost, form the supporting space for waterproof concrete through a backplate, make things convenient for pouring of waterproof concrete, carry out pouring of a protective layer promptly after the waterproof layer initial set and can let a protective layer and waterproof layer can be better link together easily, improve joint strength.
The utility model provides a foundation ditch prevention of seepage water structure, includes the supporting pit, is located the embedded groove of supporting pit bottom, pours the waterproof layer in the embedded groove to and both sides are connected respectively on the waterproof layer with the supporting layer on the supporting pit inner wall.
Through adopting above-mentioned technical scheme, can realize waterproof function through the waterproof layer, improve the structural strength of supporting wall through the supporting layer.
Preferably, a reinforcing edge extends towards the inside of the embedded groove on one side of the supporting layer close to the waterproof layer.
Through adopting above-mentioned technical scheme, the setting on reinforcing edge can let the waterproof layer more firm with the intensity of a protective layer.
Preferably, the number of the supporting layers is two, the two supporting layers are respectively connected to two sides of the waterproof layer and are respectively connected with two inner walls of the supporting pit.
Through adopting above-mentioned technical scheme, through setting up the support layer in waterproof layer both sides, can improve and strut intensity, and reduced the used material of waterproof layer.
The utility model provides a be used for foundation ditch prevention of seepage water temporary support subassembly, includes claim 1 the embedded groove, and set up temporary fender board in the embedded groove, the embedded groove is located the middle part of strutting the hole, temporary fender board pastes and puts on the lateral wall of embedded groove, and temporary fender board is kept away from embedded groove one side and is rotated and be connected with the landing leg, and the landing leg is kept away from the fixed mounting that is used for fixed landing leg that is provided with in temporary fender board one end.
Through adopting above-mentioned technical scheme, this temporary support subassembly can let waterproof concrete and ordinary concrete separately use, and then forms waterproof layer and a supporting layer, through mounting and landing leg convenience to the fixed of a temporary board, installation, convenient operation.
Preferably, the fixing part comprises a connecting plate rotatably connected to the supporting leg, the supporting leg is connected to the middle of one side of the connecting plate, and a pin is vertically and slidably connected to the connecting plate.
Through adopting above-mentioned technical scheme, the pin passes the connecting plate and fixes subaerial through the landing leg with the temporary support board fixed.
Preferably, the temporary supporting and protecting plate inclines by 5-10 degrees towards one side of the inner wall of the supporting pit or inclines by 3-5 degrees towards one side of the embedded groove.
By adopting the technical scheme, the inclined supporting plate forms the inclined waterproof layer and the inclined supporting layer, and the structural strength of the supporting wall is higher.
Preferably, the legs are retractable legs.
Through adopting above-mentioned technical scheme, can conveniently fix after the slope of propping up the backplate temporarily through the flexible of landing leg.
Preferably, the landing leg includes upper tube, low tube and both ends threaded connection threaded rod on upper beam and low tube respectively, the screw thread opposite direction at threaded rod both ends.
Through adopting above-mentioned technical scheme, rotate the threaded rod, can let top tube and low tube be close to each other or keep away from, and then can realize the flexible of landing leg.
Preferably, the threaded rod is vertically fixedly connected with a handle.
In conclusion, the invention has the following beneficial effects:
1. through the arrangement of the temporary supporting assembly, the temporary supporting assembly can enable waterproof concrete and common concrete to be separately used, so that a waterproof layer and a supporting layer are formed, the temporary supporting plate is conveniently fixed through the fixing piece and the supporting leg, and the installation and the operation are convenient;
2. the use amount of the waterproof concrete can be reduced by using the concrete with different materials for the waterproof layer and the supporting layer, so that the cost is saved, the supporting space is formed for the waterproof concrete by the supporting plate, the pouring of the waterproof concrete is convenient, the supporting layer can be easily connected with the waterproof layer by pouring the supporting layer after the waterproof layer is initially set, and the connecting strength is improved;
3. can realize waterproof function through the waterproof layer, improve the structural strength of supporting wall through the supporting layer.
Drawings
FIG. 1 is a partial cross-sectional display view of example 1;
fig. 2 is a schematic structural view of a temporary support assembly in example 1;
FIG. 3 is an enlarged view of portion A of FIG. 2;
FIG. 4 is a partial cross-sectional view of example 2.
Reference numerals: 1. a foundation pit; 2. a support pit; 3. pre-burying a groove; 4. a temporary support assembly; 40. a temporary support guard plate; 41. a support leg; 410. feeding a pipe; 411. a lower pipe; 412. a threaded rod; 413. a handle; 42. a fixing member; 420. a connecting plate; 421. a pin; 5. supporting a protecting wall; 50. a waterproof layer; 51. a supporting layer; 510. and (5) reinforcing the edge.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings.
Embodiment 1, a foundation ditch prevention of seepage water structure, refer to fig. 1, including the bulkhead that is located the periphery of foundation ditch 1, the bulkhead includes a supporting layer 51 and connects waterproof layer 50 on supporting layer 51, and supporting layer 51 is provided with two in this embodiment, sets up the both sides of early waterproof layer 50 respectively.
The side of the supporting layer 51 adjacent to the waterproof layer 50 is extended downward to form a reinforcing edge 510.
Supporting pits 2 are excavated at the periphery of the foundation pit 1, the waterproof wall is poured in the supporting pits 2, and a temporary supporting assembly 4 is needed for concrete pouring of the waterproof wall.
The utility model provides a temporary support subassembly 4, refers to fig. 2, fig. 3, is provided with temporary support subassembly 4 in the support hole 2, and temporary support subassembly 4 includes along the embedded groove 3 of support hole 2 length direction, is provided with temporary fender board 40 on two inner walls of embedded groove 3 respectively, and temporary fender board 40 deviates from one side each other and rotates and be connected with landing leg 41, and landing leg 41 keeps away from temporary fender board 40 and rotates and be connected with and fix landing leg 41 at subaerial mounting 42.
The landing leg 41 includes that the upper tube 410 of rotation connection on temporarily propping up the backplate 40, threaded connection are kept away from the threaded rod 412 on temporarily propping up the backplate 40 at upper tube 410 and threaded connection is being kept away from the lower tube 411 of upper tube 410 one end at threaded rod 412, the screw thread opposite direction at threaded rod 412 both ends, the perpendicular fixedly connected with handle 413 in threaded rod 412 middle part rotates handle 413, can make upper tube 410 and lower tube 411 be close to each other or keep away from, and then can realize the flexible of landing leg 41.
The fixing member 42 includes a connecting plate 420, a middle portion of one side of the connecting plate 420 is rotatably connected to one end of the lower pipe 411 away from the threaded rod 412, one side of the connecting plate 420 away from the lower pipe 411 is attached to the ground, and two pins 421 penetrating through the connecting plate 420 and then being driven into the ground are vertically arranged on the connecting plate 420.
A foundation pit construction method includes marking a line at a position of a foundation pit 1 to be excavated, excavating a supporting pit 2 outside on line, forming an embedded groove 3 at the bottom in the supporting pit 2, installing a temporary supporting assembly 4 in the supporting pit 2, pouring waterproof concrete between two temporary supporting baffles, and waiting for initial setting of the waterproof concrete.
And (3) forming a waterproof layer 50 after the waterproof concrete is initially set, dismantling the temporary support assembly 4, and pouring common concrete at the positions, located on the two sides of the waterproof layer 50, of the support pit 2 to form a support layer 51.
Excavation foundation ditch 1 after supporting layer 51 solidifies, can let foundation ditch 1 and external isolation through waterproof layer 50, prevent the seepage of external groundwater.
After the temporary supporting plate 40 is taken down, a gap will flow out between the embedded groove 3 and the waterproof layer 50, the gap will be filled by pouring concrete on two sides of the waterproof layer 50, and the supporting layer 51 is solidified to form a reinforcing edge 510.
Embodiment 2, this embodiment is different from embodiment 1 in that: referring to fig. 4, the side walls of the embedment grooves 3 form an inclination angle of 8 ° with the bottom surface.
After the temporary supporting plate 40 is attached to the side wall of the embedded groove 3, the temporary supporting plate 40 and the ground form an 8-degree inclination angle, so that the cross section of the waterproof layer 50 is in a T shape, and after ordinary concrete is poured, the temporary supporting plate is connected with the supporting layer 51 more compactly.
The above-mentioned embodiments are merely illustrative and not restrictive, and those skilled in the art can make modifications to the embodiments without inventive contribution as required after reading the present specification, but only protected by the patent laws within the scope of the claims.
Claims (9)
1. A construction method of a foundation pit is characterized in that: excavation supporting pit (2) is arranged at the periphery of a foundation pit (1), an embedded groove (3) is formed in the bottom of the supporting pit (2), two temporary supporting guard plates (40) are arranged on two side walls of the embedded groove (3) respectively, waterproof concrete is poured between the two temporary supporting guard plates (40) to form a waterproof layer (50), after the waterproof layer (50) is initially set, the temporary supporting guard plates (40) are taken down, common concrete is poured to two sides of the waterproof layer (50) in the foundation pit (1) to form supporting layers (51), and the foundation pit (1) is excavated after the supporting layers (51) are initially set.
2. The utility model provides a foundation ditch prevention of seepage water structure which characterized in that: the anti-corrosion and anti-corrosion combined type concrete support pit comprises a support pit (2), an embedded groove (3) located at the bottom in the support pit (2), a waterproof layer (50) poured in the embedded groove (3), and a support layer (51) with two sides connected to the waterproof layer (50) and the inner wall of the support pit (2) respectively.
3. The foundation pit seepage prevention structure according to claim 2, wherein: one side of the supporting layer (51) close to the waterproof layer (50) extends into the embedded groove (3) to form a reinforcing edge (510).
4. The foundation pit seepage prevention structure according to claim 2 or 3, wherein: the two supporting layers (51) are respectively connected to two sides of the waterproof layer (50) and respectively connected with two inner walls of the supporting pit (2).
5. An anti-seepage temporary support assembly (4) for foundation pits, comprising the embedded groove (3) of claim 1 and a temporary support plate (40) arranged in the embedded groove (3), and is characterized in that: the embedded groove (3) is located in the middle of the supporting pit (2), the temporary supporting plate (40) is attached to the side wall of the embedded groove (3), one side, far away from the embedded groove (3), of the temporary supporting plate (40) is rotatably connected with a supporting leg (41), and one end, far away from the temporary supporting plate (40), of the supporting leg (41) is fixedly provided with a fixing piece (42) used for fixing the supporting leg (41).
6. An anti-seepage temporary support assembly (4) for foundation pits according to claim 5, characterized in that: the fixing piece (42) comprises a connecting plate (420) rotatably connected to the supporting leg (41), the supporting leg (41) is connected to the middle of one side face of the connecting plate (420), and a pin (421) is vertically and slidably connected to the connecting plate (420).
7. An anti-seepage temporary support assembly (4) for foundation pits according to claim 6, characterized in that: the temporary supporting plate (40) inclines by 5-10 degrees towards one side of the inner wall of the supporting pit (2) or inclines by 3-5 degrees towards one side of the embedded groove (3).
8. An anti-seepage temporary support assembly (4) for foundation pits according to claim 7, characterized in that: the supporting legs (41) are telescopic supporting legs (41).
9. An anti-seepage temporary support assembly (4) for foundation pits according to claim 8, characterized in that: the supporting leg (41) comprises an upper pipe (410), a lower pipe (411) and a threaded rod (412) with two ends respectively connected to the upper pipe and the lower pipe in a threaded mode, and the thread directions of the two ends of the threaded rod (412) are opposite.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910949787.9A CN110685284B (en) | 2019-10-08 | 2019-10-08 | Construction method of foundation pit |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910949787.9A CN110685284B (en) | 2019-10-08 | 2019-10-08 | Construction method of foundation pit |
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| CN110685284A true CN110685284A (en) | 2020-01-14 |
| CN110685284B CN110685284B (en) | 2021-01-29 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114411695A (en) * | 2022-01-24 | 2022-04-29 | 梁军 | Construction method and connection structure of underground cast-in-place continuous wall |
| CN114775637A (en) * | 2022-05-09 | 2022-07-22 | 北京四达基业市政建设工程有限公司 | Deep foundation pit supporting structure and supporting method |
| CN115324037A (en) * | 2022-09-13 | 2022-11-11 | 六安市永固管桩建材有限公司 | High-bearing-capacity pipe pile material proportioning method and high-bearing-capacity pipe pile |
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| CN110685284B (en) | 2021-01-29 |
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Denomination of invention: A construction method of foundation pit Effective date of registration: 20220601 Granted publication date: 20210129 Pledgee: Yuexiu sub branch of Bank of Guangzhou Co.,Ltd. Pledgor: Guangdong QIANXING Construction Engineering Co.,Ltd. Registration number: Y2022980006954 |
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Date of cancellation: 20230612 Granted publication date: 20210129 Pledgee: Yuexiu sub branch of Bank of Guangzhou Co.,Ltd. Pledgor: Guangdong QIANXING Construction Engineering Co.,Ltd. Registration number: Y2022980006954 |
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| PE01 | Entry into force of the registration of the contract for pledge of patent right | ||
| PE01 | Entry into force of the registration of the contract for pledge of patent right |
Denomination of invention: A Construction Method for Foundation Pit Effective date of registration: 20230613 Granted publication date: 20210129 Pledgee: Yuexiu sub branch of Bank of Guangzhou Co.,Ltd. Pledgor: Guangdong QIANXING Construction Engineering Co.,Ltd. Registration number: Y2023980043733 |