CN221001020U - Pit-in-pit waterproof structure - Google Patents
Pit-in-pit waterproof structure Download PDFInfo
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- CN221001020U CN221001020U CN202322331567.4U CN202322331567U CN221001020U CN 221001020 U CN221001020 U CN 221001020U CN 202322331567 U CN202322331567 U CN 202322331567U CN 221001020 U CN221001020 U CN 221001020U
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- pit
- concrete layer
- foundation pit
- fixedly arranged
- ground
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 44
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 38
- 239000010959 steel Substances 0.000 claims abstract description 38
- 239000000463 material Substances 0.000 claims abstract description 22
- 238000010276 construction Methods 0.000 claims abstract description 19
- 229910001294 Reinforcing steel Inorganic materials 0.000 claims abstract description 8
- 239000002699 waste material Substances 0.000 claims description 11
- 239000002893 slag Substances 0.000 claims description 8
- 230000001154 acute effect Effects 0.000 claims description 3
- 238000001556 precipitation Methods 0.000 claims 1
- 239000003673 groundwater Substances 0.000 abstract description 10
- 238000000034 method Methods 0.000 abstract description 7
- 238000007667 floating Methods 0.000 abstract description 4
- 239000002689 soil Substances 0.000 abstract description 4
- 230000035699 permeability Effects 0.000 abstract description 3
- 230000003014 reinforcing effect Effects 0.000 description 10
- 238000009412 basement excavation Methods 0.000 description 1
- 239000011449 brick Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000012528 membrane Substances 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 238000004078 waterproofing Methods 0.000 description 1
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- Underground Structures, Protecting, Testing And Restoring Foundations (AREA)
Abstract
The utility model provides a waterproof structure of a pit in a pit, which solves the problems that when a foundation pit is deeper or a construction position is in a geological layer with higher water permeability, the risk of foundation pit piping, side wall leakage and collapse can occur in the foundation pit construction process due to larger ground water level floating. The utility model includes the ground; the foundation pit is formed in the ground, a waterproof layer is fixedly arranged at the bottom of the foundation pit, and the waterproof layer comprises a first concrete layer poured at the bottom of the foundation pit and a first waterproof coiled material fixedly arranged above the first concrete layer; reinforcing steel meshes are uniformly distributed in the first concrete layer. According to the utility model, the steel bar net piece is paved in the first concrete layer positioned at the bottom of the foundation pit, and the steel plate positioned above the steel bar net piece is inserted into the ground through the first steel bars, so that the integral structural strength and stability of the first concrete layer can be enhanced, the ground water level is prevented from floating, and the first concrete layer is destroyed when the stability structure of the soil body is influenced.
Description
Technical Field
The utility model relates to the field of foundation pit construction, in particular to a waterproof structure in a pit.
Background
With the continuous development of urban process, urban center has limited land utilization, promotes the development of buildings to sky and underground, and deep foundation pit construction is required in the construction of high-rise buildings, underground structures or other engineering projects, and in the process of deep foundation pit construction, underground complexity, unknowns and multiple changes become heavy difficulties in construction, in some areas with higher underground water level, underground water can enter the interior of a foundation pit through soil pores, and dewatering wells are often used in the foundation pit construction to reduce the water level near the foundation pit.
Although the water level near the foundation pit can be effectively reduced by using dewatering wells and other modes, when the foundation pit is deep or the construction position is in a geological layer with high water permeability, the risks of foundation pit piping, side wall leakage and collapse can occur in the foundation pit construction process due to the fact that the underground water level floats greatly.
Disclosure of utility model
In order to solve the problems that in the background technology, when a foundation pit is deeper or a construction position is in a geological layer with higher water permeability, because the ground water level floats greatly, risks of foundation pit piping, side wall leakage and collapse can occur in the foundation pit construction process, the utility model provides a pit-in-pit waterproof structure.
The technical scheme of the utility model is as follows: a waterproof structure of pit in pit comprises ground;
The foundation pit is formed in the ground, a waterproof layer is fixedly arranged at the bottom of the foundation pit, and the waterproof layer comprises a first concrete layer poured at the bottom of the foundation pit and a first waterproof coiled material fixedly arranged above the first concrete layer;
reinforcing steel meshes are uniformly distributed in the first concrete layer;
A steel plate is fixedly arranged in the first concrete layer, the steel plate is positioned above the steel bar net sheet, a first steel bar is fixedly arranged at the bottom of the steel plate, and the first steel bar penetrates out of the first concrete layer and is inserted into the ground;
A retaining wall which is arranged in a rectangular shape is fixedly arranged on the first concrete layer, a second waterproof coiled material is fixedly arranged on the inner side and the top of the retaining wall, and the bottom of the second waterproof coiled material is fixedly connected with the outer end of the first waterproof coiled material;
the ground is provided with a plurality of dewatering wells which are distributed around the foundation pit.
Preferably, a second concrete layer is poured above the first waterproof coiled material.
Preferably, a fixed plate is fixedly arranged in the second concrete layer, a supporting rod is fixedly arranged on the fixed plate, and an angle between the supporting rod and the second concrete layer is an acute angle smaller than 90 degrees;
The top of bracing piece is fixed and is equipped with the angle steel, and two curb plates of angle steel are leaned on respectively the inboard and the top of retaining wall.
Preferably, a concrete waste slag layer is filled between the retaining wall and the ground, a third concrete layer is poured at the top ends of the concrete waste slag layer and the retaining wall, and the side plate of the angle steel positioned at the top of the retaining wall is fixedly arranged in the third concrete layer.
Preferably, the retaining wall comprises a plurality of concrete aerated blocks laid on the first concrete layer;
The concrete air-adding block is provided with a second slot hole which is penetrated from top to bottom, and a second reinforcing steel bar is penetrated in the second slot hole.
Preferably, the bottom of the foundation pit is provided with a water collecting pit;
a third slot hole is formed in the ground, two ends of the third slot hole are respectively communicated with the bottom of the side face of the water collecting pit and a dewatering well adjacent to the water collecting pit, and a first connecting pipe is fixedly arranged in the third slot hole.
Preferably, a rectangular water collecting tank is arranged on the ground, and the water collecting tank is positioned between the dewatering well and the foundation pit;
A fourth slot extending along the left-right direction is arranged in the ground, two ends of the fourth slot are respectively communicated with the bottom of the side face of the water collecting tank and the dewatering well adjacent to the water collecting tank, and a second connecting pipe is fixedly arranged in the fourth slot.
The utility model has the advantages that: by arranging the dewatering well outside the foundation pit, the water level near the foundation pit is reduced, so that the risks of foundation pit piping, side wall leakage and collapse in the foundation pit construction process are reduced.
Through pouring a first concrete layer at the bottom of the excavated foundation pit, and paving a first waterproof coiled material on the first concrete layer, groundwater is prevented from piping or exuding from the bottom of the foundation pit when the groundwater level is greatly floated.
Through the retaining wall of building by laying bricks or stones around the foundation ditch that digs, survey in the retaining wall and lay the second waterproofing membrane, prevent that groundwater from floating great when, the foundation ditch lateral wall from taking place the collapse, cause the threat to constructor, can also prevent that groundwater from oozing from the side of foundation ditch, influence normal construction.
Through lay the reinforcing bar net piece in the first concrete layer that is located the foundation ditch bottom, can strengthen first concrete layer's structural strength to insert the steel sheet that will be located the reinforcing bar net piece top in ground through first reinforcing bar, can strengthen first concrete layer holistic structural strength and stability, prevent that groundwater level from taking place to float, when influencing soil body stability structure, destroy first concrete layer.
Drawings
In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, it being obvious that the drawings in the following description are only some embodiments of the utility model, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic diagram of the overall structure of the present utility model;
FIG. 2 is a cross-sectional view showing the construction of a waterproof layer according to the present utility model;
FIG. 3 is a structural sectional view of the dewatering well of the present utility model;
fig. 4 is a structural sectional view of the retaining wall of the present utility model.
In the figure: 101. ground surface; 102. a foundation pit; 2. a waterproof layer; 201. a first concrete layer; 202. reinforcing steel bar meshes; 203. a steel plate; 204. a first reinforcing bar; 205. a first waterproof coiled material; 3. a retaining wall; 301. adding air to concrete; 302. a second reinforcing bar; 303. a second waterproof coiled material; 4. a concrete waste slag layer; 5. a third concrete layer; 6. angle steel; 8. a fixing plate; 9. a support rod; 10. a water collecting pit; 11. dewatering well; 12. a first connection pipe; 13. a water collection tank; 14. a second connection pipe; 15. and a second concrete layer.
Detailed Description
The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without any inventive effort, are intended to be within the scope of the utility model.
Example 1: a waterproof structure of pit in pit, as shown in fig. 1-4, includes a ground 101; the ground 101 is provided with a foundation pit 102, the bottom of the foundation pit 102 is fixedly provided with a waterproof layer 2, and the waterproof layer 2 comprises a first concrete layer 201 poured at the bottom of the foundation pit 102 and a first waterproof coiled material 205 fixedly arranged above the first concrete layer 201; reinforcing steel meshes 202 are uniformly distributed in the first concrete layer 201; a steel plate 203 is fixedly arranged in the first concrete layer 201, the steel plate 203 is positioned above the steel bar net 202, a first steel bar 204 is fixedly arranged at the bottom of the steel plate 203, and the first steel bar 204 penetrates out of the first concrete layer 201 and is inserted into the ground 101; a retaining wall 3 which is arranged in a rectangular shape is fixedly arranged on the first concrete layer 201, a second waterproof coiled material 303 is fixedly arranged on the inner side and the top of the retaining wall 3, and the bottom of the second waterproof coiled material 303 is fixedly connected with the outer end of the first waterproof coiled material 205; a plurality of dewatering wells 11 are arranged around a foundation pit 102 on the ground 101.
A second concrete layer 15 is poured above the first waterproof coiled material 205; the second concrete layer 15 is used for covering and protecting the first waterproof coiled material 205, so that the first waterproof coiled material 205 is prevented from being damaged during construction of the foundation pit 102, meanwhile, the structural strength of the first concrete layer 201 can be enhanced, the ground water level is prevented from floating, and the first concrete layer 201 is prevented from being damaged when the soil stability structure is influenced.
The second concrete layer 15 is internally and fixedly provided with a fixed plate 8, the fixed plate 8 is fixedly provided with a supporting rod 9, and the angle between the supporting rod 9 and the second concrete layer 15 is an acute angle smaller than 90 degrees; the top end of the supporting rod 9 is fixedly provided with an angle steel 6, and two side plates of the angle steel 6 are respectively abutted against the inner side and the top of the retaining wall 3; the fixed plate 8 at the bottom end of the supporting rod 9 can increase the contact area between the supporting rod 9 and the second concrete layer 15, and the supporting rod 9 is prevented from loosening; the angle steel 6 on the top end of the supporting rod 9 can improve the contact area between the supporting rod 9 and the retaining wall 3, and improve the stability of the supporting rod 9 for supporting the side surface of the retaining wall 3.
A concrete waste slag layer 4 is filled between the retaining wall 3 and the ground 101, a third concrete layer 5 is poured on the top ends of the concrete waste slag layer 4 and the retaining wall 3, and a side plate of an angle steel 6 positioned at the top of the retaining wall 3 is fixedly arranged in the third concrete layer 5; the waste concrete slag layer 4 fills gaps between the retaining wall 3 and the ground 101 by adopting waste concrete slag, so that materials are saved, the structural strength of the outer side of the retaining wall 3 can be improved, and the side collapse of the foundation pit 102 is prevented; the third concrete layer 5 is poured on the top of the concrete waste residue layer 4 and the retaining wall 3, so that the stability of the edge structure of the foundation pit 102 can be enhanced, and the side plate of the angle steel 6 positioned at the top of the retaining wall 3 is poured in the third concrete layer 5, so that the angle steel 6 can be fixed, and the stability of the supporting rod 9 on the retaining wall 3 is improved.
The retaining wall 3 includes a plurality of concrete aerated blocks 301 laid on the first concrete layer 201; a second slot hole which is through from top to bottom is formed in the concrete air adding block 301, and a second reinforcing steel bar 302 is arranged in the second slot hole in a penetrating manner; by inserting the second reinforcing bars 302 vertically disposed in the concrete air blocks 301 for building the retaining wall 3, the structural strength of the retaining wall 3 as a whole can be enhanced, and the side collapse of the foundation pit 102 in the third concrete layer 5 can be prevented, and the improvement can be achieved.
The bottom of the foundation pit 102 is provided with a water collecting pit 10; a third slot hole is formed in the ground 101, two ends of the third slot hole are respectively communicated with the bottom of the side surface of the water collecting pit 10 and the dewatering well 11 adjacent to the water collecting pit, and a first connecting pipe 12 is fixedly arranged in the third slot hole; by arranging the water collection pit 10 in the foundation pit 102, accumulated water in the foundation pit 102 in a rainy day can be collected, and normal construction is prevented from being influenced; by providing the first connecting pipe 12 to communicate the sump 10 with the adjacent dewatering well 11, water in the sump 10 can be discharged through the dewatering well 11.
The ground 101 is provided with a water collecting tank 13 which is arranged in a rectangular mode, and the water collecting tank 13 is positioned between the dewatering well 11 and the foundation pit 102; a fourth slot hole extending along the left-right direction is formed in the ground 101, two ends of the fourth slot hole are respectively communicated with the bottom of the side surface of the water collecting tank 13 and the dewatering well 11 adjacent to the water collecting tank, and a second connecting pipe 14 is fixedly arranged in the fourth slot hole; the rectangular water collecting tank 13 is arranged between the dewatering well 11 and the foundation pit 102, so that water outside the foundation pit 102 can be prevented from flowing downwards into the foundation pit 102 to influence normal construction; by providing the second connection pipe 14 to communicate the water collection tank 13 with the dewatering well 11, the water in the water collection tank 13 can be discharged through the dewatering well 11.
Working principle: before the foundation pit 102 is excavated, a plurality of dewatering wells 11 are arranged around the outer side of the foundation pit 102 to reduce the groundwater level near the foundation pit 102; when the excavation of the foundation pit 102 is completed, a water collecting pit 10 is excavated in the foundation pit 102, a first connecting pipe 12 is arranged to communicate the water collecting pit 10 with a dewatering well 11 adjacent to the water collecting pit 10, a water collecting tank 13 which is arranged in a rectangular mode is arranged between the foundation pit 102 and the foundation pit 102, and a second connecting pipe 14 is arranged to communicate the water collecting tank 13 with the dewatering well 11; the method comprises the steps of arranging a reinforcing mesh 202 at the bottom of a foundation pit 102, inserting a steel plate 203 and a first reinforcing bar 204 into the ground 101, fixing the reinforcing mesh 202, pouring a first concrete layer 201 at the bottom of the foundation pit 102, covering the reinforcing mesh 202, simultaneously laying a retaining wall 3 laid in a rectangular shape on the edge of the first concrete layer 201, respectively laying a first waterproof roll 205 and a second waterproof roll 303 above the first concrete layer 201 and on the inner side of the retaining wall 3, then pouring a second concrete layer 15 above the first waterproof roll 205 to cover and protect the first waterproof roll 205, simultaneously filling a concrete waste residue layer 4 between the retaining wall 3 and the ground 101, and pouring a third concrete layer 5 at the top ends of the concrete waste residue layer 4 and the retaining wall 3.
It will be evident to those skilled in the art that the utility model is not limited to the details of the foregoing illustrative embodiments, and that the present utility model may be embodied in other specific forms without departing from the spirit or essential characteristics thereof. The present embodiments are, therefore, to be considered in all respects as illustrative and not restrictive, the scope of the utility model being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.
Claims (7)
1. The utility model provides a pit waterproof construction in pit which characterized in that: comprising a ground (101);
A foundation pit (102) is formed in the ground (101), a waterproof layer (2) is fixedly arranged at the bottom of the foundation pit (102), and the waterproof layer (2) comprises a first concrete layer (201) poured at the bottom of the foundation pit (102) and a first waterproof coiled material (205) fixedly arranged above the first concrete layer (201);
reinforcing steel meshes (202) are uniformly distributed in the first concrete layer (201);
A steel plate (203) is fixedly arranged in the first concrete layer (201), the steel plate (203) is positioned above the steel bar net sheet (202), a first steel bar (204) is fixedly arranged at the bottom of the steel plate (203), and the first steel bar (204) penetrates out of the first concrete layer (201) and is inserted into the ground (101);
A retaining wall (3) which is arranged in a rectangular shape is fixedly arranged on the first concrete layer (201), a second waterproof coiled material (303) is fixedly arranged on the inner side and the top of the retaining wall (3), and the bottom of the second waterproof coiled material (303) is fixedly connected with the outer end of the first waterproof coiled material (205);
The ground (101) is provided with a plurality of dewatering wells (11) which are distributed around the foundation pit (102).
2. A pit-in-pit waterproof structure according to claim 1, wherein: and a second concrete layer (15) is poured above the first waterproof coiled material (205).
3. A pit-in-pit waterproof structure according to claim 2, wherein: a fixed plate (8) is fixedly arranged in the second concrete layer (15), a supporting rod (9) is fixedly arranged on the fixed plate (8), and an angle between the supporting rod (9) and the second concrete layer (15) is an acute angle smaller than 90 degrees;
The top of the supporting rod (9) is fixedly provided with an angle steel (6), and two side plates of the angle steel (6) are respectively attached to the inner side and the top of the retaining wall (3).
4. A pit-in-pit waterproof structure according to claim 1, wherein: and a third concrete layer (5) is poured at the top ends of the concrete waste slag layer (4) and the retaining wall (3), and the side plates positioned at the top angle steel (6) of the retaining wall (3) are fixedly arranged in the third concrete layer (5).
5. A pit-in-pit waterproof structure according to claim 1, wherein: the retaining wall (3) comprises a plurality of concrete aerated blocks (301) which are built on a first concrete layer (201);
A second slot hole which is through from top to bottom is arranged on the concrete air adding block (301), and a second reinforcing steel bar (302) is penetrated in the second slot hole.
6. A pit-in-pit waterproof structure according to claim 1, wherein: a water collecting pit (10) is formed at the bottom of the foundation pit (102);
A third slot hole is formed in the ground (101), two ends of the third slot hole are respectively communicated with the bottom of the side face of the water collecting pit (10) and the adjacent precipitation well (11), and a first connecting pipe (12) is fixedly arranged in the third slot hole.
7. A pit-in-pit waterproof structure according to claim 1, wherein: a rectangular water collecting tank (13) is arranged on the ground (101), and the water collecting tank (13) is positioned between the dewatering well (11) and the foundation pit (102);
A fourth slot hole extending along the left-right direction is formed in the ground (101), two ends of the fourth slot hole are respectively communicated with the bottom of the side face of the water collecting tank (13) and the dewatering well (11) adjacent to the water collecting tank, and a second connecting pipe (14) is fixedly arranged in the fourth slot hole.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322331567.4U CN221001020U (en) | 2023-08-29 | 2023-08-29 | Pit-in-pit waterproof structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322331567.4U CN221001020U (en) | 2023-08-29 | 2023-08-29 | Pit-in-pit waterproof structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN221001020U true CN221001020U (en) | 2024-05-24 |
Family
ID=91086918
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202322331567.4U Active CN221001020U (en) | 2023-08-29 | 2023-08-29 | Pit-in-pit waterproof structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN221001020U (en) |
-
2023
- 2023-08-29 CN CN202322331567.4U patent/CN221001020U/en active Active
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