CN111236284B - A method and structure for draining groundwater from the bottom and surrounding areas of a basement - Google Patents
A method and structure for draining groundwater from the bottom and surrounding areas of a basementInfo
- Publication number
- CN111236284B CN111236284B CN202010182405.7A CN202010182405A CN111236284B CN 111236284 B CN111236284 B CN 111236284B CN 202010182405 A CN202010182405 A CN 202010182405A CN 111236284 B CN111236284 B CN 111236284B
- Authority
- CN
- China
- Prior art keywords
- basement
- water
- layer
- drainage
- drainage blind
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Classifications
-
- 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
- E02D19/10—Restraining of underground water by lowering level of ground water
-
- 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
-
- 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
- E02D19/08—Restraining of underground water by employing open ditches arranged below the level of the water
-
- E—FIXED CONSTRUCTIONS
- E03—WATER SUPPLY; SEWERAGE
- E03F—SEWERS; CESSPOOLS
- E03F5/00—Sewerage structures
- E03F5/04—Gullies inlets, road sinks, floor drains with or without odour seals or sediment traps
Landscapes
- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Environmental & Geological Engineering (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Mining & Mineral Resources (AREA)
- Paleontology (AREA)
- Civil Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Public Health (AREA)
- Water Supply & Treatment (AREA)
- Health & Medical Sciences (AREA)
- Underground Structures, Protecting, Testing And Restoring Foundations (AREA)
Abstract
本发明公开了一种地下室底部及四周地下水引排方法及结构，本发明是在地下室四周及底部设置纵横相交的排水暗沟，并在纵横相交点设置集水井将来自排水暗沟的水临时汇集后引至位于地下室外墙四角的降水井，通过降水井内的潜水泵将降水井内的水抽至室外地面的蓄水沉淀池，经沉淀后的水作为施工用水再次利用。本发明有效解决了基坑施工期间排水的问题，加快施工速度，将施工废水转化为中水进行水资源综合利用，起到节约用水和降低施工成本的作业，降低地下水压力，避免地下室底板及地下室外墙渗漏风险确保工程质量。
The present invention discloses a method and structure for draining groundwater from the basement bottom and surrounding areas. The method comprises installing vertically and horizontally intersecting drainage ditches around the basement and at the basement bottom, and providing water collection wells at the intersections to temporarily collect water from the drainage ditches and then direct it to precipitation wells located at the four corners of the basement's exterior walls. Submersible pumps within the precipitation wells pump the water from the precipitation wells to outdoor ground-based water storage and sedimentation tanks, where the settled water is reused as construction water. The present invention effectively solves the problem of drainage during foundation pit construction, speeds up construction, converts construction wastewater into reclaimed water for comprehensive water resource utilization, and achieves water conservation and construction cost reduction. It also reduces groundwater pressure, avoids the risk of leakage from the basement floor and exterior walls, and ensures project quality.
Description
Technical Field
The invention relates to a basement bottom and surrounding groundwater drainage method and structure, and belongs to the technical field of bridge engineering prefabricated member construction.
Background
With the rapid expansion of modern buildings, the construction land is gradually lacking. Often engineering project construction site selection landform is complicated various, and the foundation ditch degree of depth is dark, and the foundation ditch area is big, still has a large amount of groundwater and rainwater in the foundation ditch. The underground water is difficult to discharge in the foundation pit construction process, and the construction progress is slow. After the building is put into use, a large number of water leakage points can appear on the bottom plate and the outer wall, and the seepage prevention and leakage stopping difficulty in the later stage is quite large. The prior art is adopted to discharge water, so that orderly development of a construction surface in the construction process cannot be ensured, when the groundwater level rises in the period of water yield, the groundwater generates pressure on the bottom plate, the basement foundation structure can be damaged, and the bottom plate and the outer wall leak. In addition, the prior art is adopted to treat the water body in the foundation pit, especially the deep foundation pit and then discharge the treated water body into a municipal sewage pipe network, so that the cost is high, the construction is difficult, and the water resource utilization is not facilitated. Thus, the prior art still has the defects and needs to be improved.
Disclosure of Invention
The invention aims to provide a basement bottom and surrounding groundwater drainage method and structure, which are used for solving the technical problems of difficult groundwater drainage, leakage caused by overhigh water pressure of a bottom plate and basement outer walls, influence on the quality of a foundation structure and the like in the foundation pit construction process, so that the defects of the prior art are overcome.
In order to achieve the above purpose, the invention adopts the following technical scheme:
The invention relates to a basement bottom and surrounding groundwater drainage method, which is characterized in that drainage blind ditches which are vertically and horizontally intersected are arranged at the periphery and the bottom of a basement, water collecting wells are arranged at the vertically and horizontally intersected points, water from the drainage blind ditches is temporarily collected and then led to dewatering wells positioned at four corners of the outer wall of the basement, water in the dewatering wells is pumped to a water storage sedimentation tank on the outdoor ground through a submersible pump in the dewatering wells, and the sedimentated water is reused as construction water.
In the basement bottom and surrounding groundwater drainage method, the construction steps of the method are as follows:
a. When the basement foundation pit is excavated, the foundation pit is excavated to be 200mm below the bottom surface of the basement bottom plate;
b. Continuously digging a pit 3m below the elevation of the basement bottom plate at four corners of the basement outer wall, and then pouring a dewatering well in the pit by adopting reinforced concrete;
c. tamping the bottom of the foundation pit to form a plain soil tamping layer, and pouring a concrete cushion layer with the thickness of 100mm on the top surface of the plain soil tamping layer;
d. the method comprises the steps that a water collecting well is built on a concrete cushion layer by adopting gray bricks, and the water collecting well is arranged on a basement bottom plate to be poured and the concrete cushion layer outside the basement outer wall in a row-column mode;
e. Paving a lower geotextile on the concrete cushion layer, and paving a reverse filtering layer on the lower geotextile;
f. Installing drainage blind ditches on the top surface of the reverse filtering layer, and connecting all water collecting wells and dewatering wells positioned at four corners of the outer wall of the basement into a whole through the drainage blind ditches to form drainage grids;
g. Paving an upper geotextile on the top surface of the inverted filter layer and the drainage blind drain, backfilling a covering soil layer on the top surface of the upper geotextile to the elevation of the bottom surface of the basement bottom plate, and tamping;
h. completing concrete pouring construction of a basement bottom plate and a basement outer wall on the top surface of the covering soil layer, backfilling soil to the outdoor ground elevation on the outer side of the basement outer wall, and tamping;
i. And installing a ball float valve and a submersible pump at the bottom of the dewatering well, and pumping water in the dewatering well to the water storage sedimentation tank through a pumping pipe by the submersible pump for reuse after sedimentation.
In the basement bottom and surrounding groundwater drainage method, the drainage blind drain is paved by adopting a finished inverted U-shaped groove, the width of the lower opening of the inverted U-shaped groove is 400mm, the height of the lower opening of the inverted U-shaped groove is 500mm, and semicircular holes with the radius of 200 mm are arranged in the middle of the bottoms of two side walls of the inverted U-shaped groove and are used as water inlets.
In the basement bottom and surrounding groundwater drainage method, when the drainage blind ditches are paved, M10.0 cement mortar is adopted for connection between each section of inverted U-shaped groove and the water collecting well or the dewatering well, and the drainage blind ditches are paved in a mode that the middle of each section of the drainage blind ditches is high and the four corners of each section of the drainage blind ditches are low, so that a drainage gradient of 0.5% is formed.
In the basement bottom and surrounding groundwater drainage method, the reverse filtering layer is composed of a pebble layer and a gravel layer, when the gravel layer is paved, the gravel layer forms inclined triangle piles at the bottoms of the two sides of the drainage blind drain, and the water inlet holes on the two sides of the drainage blind drain are covered by the tops of the triangle piles.
In the basement bottom and surrounding groundwater drainage method, when the geotechnical cloth on the upper layer is paved on the top surfaces of the gravel layer and the drainage blind drain, the geotechnical cloth should be paved by tightly attaching to the top surface of the drainage blind drain and the triangular pile.
In the basement bottom and surrounding groundwater drainage method, the dewatering well is cast in a sectional casting mode, a steel ladder stand is embedded in a well wall at one side of the dewatering well during casting, the first casting height is higher than the elevation of a basement bottom plate to be cast, and the upper section of the dewatering well is cast to the ground elevation after construction of a plain soil ramming layer, a concrete cushion layer, a water collecting well, a lower geotextile, a reverse filtering layer and an upper geotextile is completed.
The basement bottom and surrounding groundwater drainage structure comprises dewatering wells positioned at four corners of the basement and a group of water collecting wells positioned below the basement bottom plate and outside the basement outer wall, wherein the group of water collecting wells are connected with the dewatering wells at the four corners of the basement through drainage blind ditches, a submersible pump and a floating ball valve are arranged in the dewatering wells, the submersible pump is positioned on the bottom plate of the dewatering well, and the submersible pump is connected with a water storage sedimentation tank which is positioned on the outdoor ground through a water pumping pipe.
In the basement bottom and surrounding groundwater drainage structure, the drainage blind drain is a connecting piece formed by a group of inverted U-shaped grooves, the width of the lower opening of each inverted U-shaped groove is 400mm, the height of the lower opening of each inverted U-shaped groove is 500mm, and water inlets with the radius of 200 mm are arranged in the middle of the bottoms of the two side walls of each inverted U-shaped groove.
In the underground water drainage structure at the bottom and around the basement, an upper geotechnical cloth is sequentially arranged between the top of the drainage blind drain and the bottom surface of the basement bottom plate from bottom to top, a covering soil layer is arranged on the top surface of the upper geotechnical cloth, a gravel layer, a pebble layer, a concrete cushion layer and a plain soil ramming layer are sequentially arranged below the drainage blind drain from top to bottom, and triangular accumulation is arranged on the outer side of the drainage blind drain on the gravel layer to cover water inlets of the drainage blind drain.
By adopting the technical scheme, compared with the prior art, the invention effectively utilizes the thought of 'drainage combination and comprehensive utilization' by draining groundwater under the bottom plate and around the basement outer wall in blocks, collecting rainwater into the dewatering well and pumping water out of the outdoor water storage sedimentation tank through the dewatering well. Therefore, the problem of drainage during foundation pit construction is solved, the construction speed is accelerated, the construction wastewater is converted into reclaimed water for comprehensive utilization of water resources, the operations of saving water and reducing construction cost are achieved, the pressure of underground water is reduced, the leakage risk of a basement bottom plate and a basement outer wall is avoided, and the engineering quality is ensured.
Drawings
FIG. 1 is a schematic diagram of the structure of the present invention;
FIG. 2 is a cross-sectional elevation view of a blind drain;
FIG. 3 is a schematic diagram of the structure of the inverted U-shaped slot.
The device is characterized by comprising a 1-drainage blind drain, a 2-water collecting well, a 3-precipitation well, a 4-water storage sedimentation tank, a 5-basement bottom plate, a 6-basement outer wall, a 7-outdoor ground, an 8-concrete cushion layer, a 9-pebble layer, a 10-lower geotechnical cloth, a 11-plain soil rammed layer, a 12-covered soil layer, a 13-submersible pump, a 14-ball float valve, a 15-pumping pipe, a 16-steel ladder, a 17-precipitation well cover plate, a 18-well wall, a 19-precipitation well bottom plate, a 20-water inlet hole, a 21-upper geotechnical cloth, a 22-rubble layer and a 23-triangle pile.
Detailed Description
The invention is described in further detail below with reference to the drawings and examples.
The invention relates to a basement bottom and surrounding groundwater drainage method, which is shown in fig. 1-3, wherein drainage blind ditches 1 are arranged around and at the bottom of a basement, water collecting wells 2 are arranged at the cross points, water from the drainage blind ditches 1 is temporarily collected and then is led to precipitation wells 3 positioned at four corners of an outer wall 6 of the basement, and water in the precipitation wells 3 is pumped to a water storage sedimentation tank 4 of an outdoor ground 7 through submersible pumps 13 in the precipitation wells 3, and the precipitated water is reused as construction water.
The basement bottom and surrounding groundwater drainage method comprises the following construction steps:
a. When the basement foundation pit is excavated, the foundation pit is excavated to be 200mm below the bottom surface of the basement bottom plate 5;
b. Continuously digging a pit 3m below the elevation of the basement bottom plate 5 at four corners of the basement outer wall 6, and then pouring a dewatering well 3 in the pit by adopting reinforced concrete;
c. tamping the bottom of the foundation pit to form a plain soil tamping layer 11, and pouring a concrete cushion layer 8 with the thickness of 100mm on the top surface of the plain soil tamping layer 11;
d. The water collecting wells 2 are built on the concrete cushion 8 by adopting gray bricks, and the water collecting wells 2 are arranged on the concrete cushion 8 outside the basement bottom plate 5 and the basement outer wall 6 to be poured in a row-column mode;
e. paving a lower geotextile 10 on the concrete cushion layer 8, and paving a reverse filtering layer on the lower geotextile 10;
f. A drainage blind drain 1 is arranged on the top surface of the reverse filtering layer, and all water collecting wells 2 and dewatering wells 3 positioned at four corners of an external wall 6 of the basement are connected into a whole through the drainage blind drain 1 to form a drainage grid;
g. Paving an upper geotextile 21 on the top surface of the inverted filter layer and the drainage blind drain 1, backfilling a covering soil layer 12 on the top surface of the upper geotextile 21 to the elevation of the bottom surface of the basement bottom plate 5, and tamping;
h. the top surface of the covering soil layer 12 is used for completing the concrete pouring construction of the basement bottom plate 5 and the basement outer wall 6, and the outside of the basement outer wall 6 is backfilled to the outdoor ground 7 elevation and tamped;
i. And a water storage sedimentation tank 4 is constructed at one side of a wellhead of the dewatering well 3, a ball float valve 14 and a submersible pump 13 are arranged at the bottom of the dewatering well 3, and the submersible pump 13 pumps water in the dewatering well 3 to the water storage sedimentation tank 4 through a water pumping pipe 15 for reuse after sedimentation.
In the method, the drainage blind drain 1 is paved by adopting a finished inverted U-shaped groove, the width of the lower opening of the inverted U-shaped groove is 400mm, the height of the lower opening of the inverted U-shaped groove is 500mm, and semicircular holes with the radius of 200mm are arranged in the middle of the bottoms of the two side walls of the inverted U-shaped groove and are used as water inlet holes 20. When the drainage blind drain 1 is paved, the connection between each section of inverted U-shaped groove and the water collecting well 2 or the dewatering well 3 is connected by M10.0 cement mortar, and the drainage blind drain 1 is paved in a mode that the middle height and the four corners are kept low, so that the drainage gradient of 0.5% is formed. The reverse filtering layer is composed of a pebble layer 9 and a gravel layer 22, when the gravel layer 22 is paved, the gravel layer 22 forms an inclined triangle pile 23 at the bottoms of the two sides of the drainage blind drain 1, and the water inlet holes 20 on the two sides of the drainage blind drain 1 are covered by the top of the triangle pile 23. When the geotextile 21 on the upper layers is paved on the gravel layer 22 and the top surface of the drainage blind drain 1, the geotextile should be paved close to the top surface of the drainage blind drain 1 and the triangular pile 23. The construction of the dewatering well 3 adopts a sectional casting mode, a steel cat ladder 16 is pre-buried on a well wall 18 at one side of the dewatering well 3 during casting, the first casting height is higher than the elevation of a basement bottom plate 5 to be cast, and the construction of a plain soil rammed layer 11, a concrete cushion layer 8, a water collecting well 2, a lower geotextile 10, a reverse filtering layer and an upper geotextile 21 is finished, and then the upper section of the dewatering well 3 is cast to the elevation of the ground.
According to the basement bottom and surrounding groundwater drainage structure formed by the method, as shown in fig. 1-3, the structure comprises precipitation wells 3 positioned at four corners of a basement and a group of water collecting wells 2 positioned below a basement bottom plate 5 and outside a basement outer wall 6, wherein the group of water collecting wells 2 are connected with the precipitation wells 3 at four corners of the basement through drainage blind ditches 1, a submersible pump 13 and a ball float valve 14 are arranged in the precipitation wells 3, the submersible pump 13 is positioned on a precipitation well bottom plate 19, and the submersible pump 13 is connected with a water storage sedimentation tank 4 to the outdoor ground 7 through a water pumping pipe 15. The drainage blind ditch 1 is a connecting piece formed by a group of inverted U-shaped grooves, the width of the lower opening of each inverted U-shaped groove is 400mm, the height of the lower opening of each inverted U-shaped groove is 500mm, and the middle of the bottoms of the two side walls of each inverted U-shaped groove is provided with a water inlet hole 20 with the radius of 200 mm. An upper geotechnical cloth 21 is sequentially arranged between the top of the drainage blind ditch 1 and the bottom surface of the basement bottom plate 5 from bottom to top, a covering soil layer 12 is arranged on the top surface of the upper geotechnical cloth 21, a gravel layer 22, a pebble layer 9, a concrete cushion layer 8 and a plain soil ramming layer 11 are sequentially arranged below the drainage blind ditch 1 from top to bottom, and triangular piles 23 are arranged on the outer side of the drainage blind ditch 1 by the gravel layer 22 to cover water inlet holes 20 of the drainage blind ditch 1.
Examples
The structure of the underground drainage system is shown in the figures 1-3, and comprises a drainage blind ditch 1, a water collecting well 2, a dewatering well 3, a water storage sedimentation tank 4, foundation pit underground water and rainwater which are distributed below a basement bottom plate 5 in a square shape through the drainage blind ditch 1 and are distributed along the periphery of an outer wall 6 of the basement, the water is temporarily collected through the water collecting well 2 which is hidden at the junction of the drainage blind ditch 1, the water is gradually led into the dewatering wells 3 at four corners of the outer wall 6 of the basement through the drainage blind ditch 1 and the water collecting well 2, the water level is controlled by arranging a submersible pump 13 in the dewatering well 3 through a ball cock 14, and the water is pumped and discharged into the water storage sedimentation tank of the outdoor ground 7 through a water pumping pipe 15 in the dewatering well for recycling comprehensive utilization. The drainage underdrain 1 adopts a finished inverted U-shaped groove, and is subjected to positioning pre-excavation and burying construction according to the actual condition of the site in the foundation pit excavation. The two sides of the excavation surface at the bottom of the inverted U-shaped groove exceed 200mm of the inverted U-shaped groove, the soil body to be delivered is tamped mechanically or manually, a concrete cushion layer 8 with the thickness of 100mm is poured on the plain soil tamping layer 11, a geotechnical cloth is covered to serve as a mud-separating sand layer, a pebble layer 9 and a crushed stone layer 22 are paved at the bottom of the inverted U-shaped groove to serve as a reverse filtering layer, then the inverted U-shaped groove is placed, and M10.0 cement mortar is used for fixing the connection of the inverted U-shaped groove. The longitudinal drainage gradient of the inverted U-shaped groove is 0.5%, and pebble layers 9 and crushed stone layers 22 are paved on two sides of the inverted U-shaped groove to form triangular piles 23, and a layer of geotextile is covered to serve as a mud-separating sand layer. And filling a covering soil layer 12 in the inverted U-shaped groove, and then performing basement bottom plate working procedure construction. The underground water and rainwater of the foundation pit enter the drainage blind ditch 1 through the blocks to be led and discharged to the water collecting well 2. The side wall of the water collecting well 2 is built by adopting gray sand bricks, the cover plate adopts reinforced concrete precast slabs, the size of the concealed water collecting well 2 is 1.0m high, 1.0m wide and 1.5m long, and the water collecting well 2 is arranged at the junction of the drainage blind drain 1. The dewatering wells 3 are arranged around the basement outer wall 6, the dewatering wells 3 are of reinforced concrete structures, the inner side faces of the dewatering wells are provided with basement shear wall side walls, the bottoms of the dewatering wells 3 are lowered by 3m from the elevation of the basement bottom plate, the dimensions are 2m in width and 2m in length, and the heights are lowered by 3m from the elevation of the bottom plate to the elevation of the outdoor ground. The dewatering well 3 is synchronously constructed along with the connected basement outer wall 6. The underground water and rainwater of the foundation pit are led to the dewatering well 3 through the drainage blind drain 1 and the water collecting well 2. The bottom of the dewatering well 3 is provided with a model submersible pump 13 according to the water quantity, the dewatering well 3 is provided with a DN100 galvanized steel pipe as a pumping pipe 15 to pump water from the inside of the dewatering well 3 to the inside of the water storage sedimentation tank 4 of the outdoor ground 7, and a float valve 14 is adopted to control the water level elevation in the dewatering well 3. The water body pumped to the water storage sedimentation tank 4 can be subjected to sedimentation treatment to comprehensively utilize water resources according to the on-site actual construction.
The invention effectively utilizes the concept of 'emission reduction combination and comprehensive utilization' by conducting block drainage and collection of groundwater and rainwater under the bottom plate and around the outer wall of the basement into the dewatering well and then pumping the water body out of the outdoor water storage sedimentation tank through the dewatering well. Therefore, the problem of drainage during foundation pit construction is solved, the construction speed is accelerated, the construction wastewater is converted into reclaimed water for comprehensive utilization of water resources, the operations of saving water and reducing construction cost are achieved, the pressure of underground water is reduced, the leakage risk of a basement bottom plate and a basement outer wall is avoided, and the engineering quality is ensured.
Claims (7)
1. The basement bottom and the surrounding groundwater drainage method is characterized in that drainage blind ditches which are vertically and horizontally intersected are arranged on the periphery and the bottom of the basement, water collecting wells are arranged at the vertically and horizontally intersected points, water from the drainage blind ditches is temporarily collected and then led to dewatering wells positioned at four corners of the outer wall of the basement, water in the dewatering wells is pumped to a water storage sedimentation tank on the outdoor ground through a submersible pump in the dewatering wells, and the sedimented water is reused as construction water;
The construction steps of the method are as follows:
a. When the basement foundation pit is excavated, the foundation pit is excavated to be 200mm below the bottom surface of the basement bottom plate;
b. continuously digging a pit 3m below the elevation of the basement bottom plate at four corners of the basement outer wall, and then pouring a dewatering well in the pit by adopting reinforced concrete;
c. Tamping the bottom of the foundation pit to form a plain soil tamping layer, and pouring a concrete cushion layer with the thickness of 100mm on the top surface of the plain soil tamping layer;
d. The method comprises the steps that a water collecting well is built on a concrete cushion layer by adopting gray bricks, and the water collecting well is arranged on a basement bottom plate to be poured and the concrete cushion layer outside the basement outer wall in a row-column mode;
e. Paving a lower geotextile on the concrete cushion layer, and paving a reverse filtering layer on the lower geotextile;
f. Installing drainage blind ditches on the top surface of the reverse filtering layer, and connecting all water collecting wells and dewatering wells positioned at four corners of the outer wall of the basement into a whole through the drainage blind ditches to form drainage grids;
g. Paving an upper geotextile on the top surface of the inverted filter layer and the drainage blind drain, backfilling a covering soil layer on the top surface of the upper geotextile to the elevation of the bottom surface of the basement bottom plate, and tamping;
h. Completing concrete pouring construction of a basement bottom plate and a basement outer wall on the top surface of the covering soil layer, backfilling soil to the outdoor ground elevation on the outer side of the basement outer wall, and tamping;
i. A floating ball valve and a submersible pump are arranged at the bottom of the dewatering well, and the submersible pump pumps water in the dewatering well to the water storage sedimentation tank through a water pumping pipe for recycling after sedimentation;
The U-shaped drainage blind drain is paved by adopting a finished product of the U-shaped groove, the width of the lower opening of the U-shaped groove is 400mm, the height of the lower opening of the U-shaped groove is 500mm, semicircular holes with the radius of 200mm are arranged in the middle of the bottoms of two side walls of the U-shaped groove and are used as water inlet holes, when the U-shaped drainage blind drain is paved, each section of U-shaped groove and the water collecting well or the dewatering well are connected by adopting M10.0 cement mortar, and the drainage blind drain is paved in a mode of keeping the middle high and four corners low to form a drainage gradient of 0.5%.
2. The basement bottom and surrounding groundwater drainage method according to claim 1, wherein the reverse filtering layer is composed of a pebble layer and a gravel layer, when the gravel layer is paved, the gravel layer forms an inclined triangle pile at the bottoms of two sides of the drainage blind drain, and the water inlet holes on two sides of the drainage blind drain are covered by the top height of the triangle pile.
3. The method for draining groundwater in the bottom and around of a basement according to claim 2, wherein when the geotextile is laid on the top surfaces of the gravel layer and the drainage blind drain, the geotextile should be laid close to the top surface of the drainage blind drain and the triangular pile.
4. The basement bottom and surrounding groundwater drainage method according to claim 1 is characterized in that a sectional casting mode is adopted for casting of the dewatering well, a steel ladder is embedded in a wall of one side of the dewatering well during casting, the first casting height is higher than the elevation of a basement bottom plate to be cast, and the upper section of the dewatering well is cast to the ground elevation after construction of a plain soil ramming layer, a concrete cushion layer, a water collecting well, a lower geotextile, a reverse filtering layer and an upper geotextile is completed.
5. A basement bottom and surrounding groundwater drainage structure formed by the basement bottom and surrounding groundwater drainage method according to any one of claims 1-4 comprises a dewatering well (3) positioned at four corners of a basement and a group of water collecting wells (2) positioned below a basement bottom plate (5) and outside a basement outer wall (6), and is characterized in that the group of water collecting wells (2) are connected with the dewatering wells (3) at four corners of the basement through drainage blind ditches (1), a submersible pump (13) and a ball float valve (14) are arranged in the dewatering well (3), the submersible pump (13) is positioned on the dewatering well bottom plate (19), and the submersible pump (13) is connected with a water storage sedimentation tank (4) to the outdoor ground (7) through a water pumping pipe (15).
6. The basement bottom and surrounding groundwater drainage structure according to claim 5, wherein the drainage blind drain (1) is a connecting piece formed by a group of inverted U-shaped grooves, the width of the lower opening of each inverted U-shaped groove is 400mm, the height of the lower opening of each inverted U-shaped groove is 500mm, and water inlets (20) with the radius of 200mm are arranged in the middle of the bottoms of two side walls of each inverted U-shaped groove.
7. The basement bottom and surrounding groundwater drainage structure according to claim 5 is characterized in that an upper geotechnical cloth (21) is sequentially arranged between the top of the drainage blind ditch (1) and the bottom surface of the basement bottom plate (5) from bottom to top, a covering soil layer (12) is arranged on the top surface of the upper geotechnical cloth (21), a gravel layer (22), a pebble layer (9), a concrete cushion layer (8) and a plain soil ramming layer (11) are sequentially arranged below the drainage blind ditch (1) from top to bottom, and the gravel layer (22) is provided with triangular piles (23) outside the drainage blind ditch (1) to cover water inlet holes (20) of the drainage blind ditch (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010182405.7A CN111236284B (en) | 2020-03-16 | 2020-03-16 | A method and structure for draining groundwater from the bottom and surrounding areas of a basement |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010182405.7A CN111236284B (en) | 2020-03-16 | 2020-03-16 | A method and structure for draining groundwater from the bottom and surrounding areas of a basement |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN111236284A CN111236284A (en) | 2020-06-05 |
| CN111236284B true CN111236284B (en) | 2025-08-22 |
Family
ID=70866175
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010182405.7A Active CN111236284B (en) | 2020-03-16 | 2020-03-16 | A method and structure for draining groundwater from the bottom and surrounding areas of a basement |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111236284B (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112921999A (en) * | 2021-01-26 | 2021-06-08 | 中建四局第一建筑工程有限公司 | Structure of integrated circulating system for recycling rainwater in drainage zone of lower layer of bottom plate of high-water-level basement and construction method of structure |
| CN112983092B (en) * | 2021-02-07 | 2022-06-07 | 恒元建设控股集团有限公司 | Basement civil air defense structure and construction method |
| CN113417490A (en) * | 2021-06-09 | 2021-09-21 | 广州市鲁班建筑科技集团股份有限公司 | Protection system and method for ancient coffin chamber after integral translation |
| CN113445525B (en) * | 2021-09-01 | 2021-12-31 | 中铁十八局集团第五工程有限公司 | Method and structure for controlling water pressure of bottom plate in construction of bottom plate of foundation pit of deep foundation pit |
| CN113914342A (en) * | 2021-09-22 | 2022-01-11 | 中国建筑第四工程局有限公司 | Basement outer wall fertilizer groove drainage construction method |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109440775A (en) * | 2018-12-27 | 2019-03-08 | 云南省建设投资控股集团有限公司 | A kind of sunk type foundation pit Yield rainfall relation system, construction method and application method |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU2018562C1 (en) * | 1991-09-04 | 1994-08-30 | Бакулин Виктор Николаевич | Method for sandy soil drawdown |
| CN101705691B (en) * | 2009-10-30 | 2011-07-20 | 南通建工集团股份有限公司 | Construction method of dewatering well under foundation slab in foundation pit |
| CN201593203U (en) * | 2010-01-25 | 2010-09-29 | 江苏双楼建设集团有限公司 | Hiddenly-distributed seepage-proof water guiding system of baseboard of basement |
| CN202202335U (en) * | 2011-08-05 | 2012-04-25 | 昆明一建建设集团有限公司 | Flow guiding and water draining structure in deep foundation pit |
| CN102418347B (en) * | 2011-09-27 | 2013-10-23 | 天津住宅集团建设工程总承包有限公司 | Drainage construction method for blind drain and sump wells in deep foundation pit |
| CN204023596U (en) * | 2014-08-29 | 2014-12-17 | 中铁八局集团建筑工程有限公司 | Deep foundation ditch basement rock underground run off and drainage system thereof |
| US10167607B2 (en) * | 2015-09-23 | 2019-01-01 | James M. Pratt | Drainage system with contiguous void |
| CN212052829U (en) * | 2020-03-16 | 2020-12-01 | 中国建筑第四工程局有限公司 | Basement bottom and groundwater all around draw row structure |
-
2020
- 2020-03-16 CN CN202010182405.7A patent/CN111236284B/en active Active
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109440775A (en) * | 2018-12-27 | 2019-03-08 | 云南省建设投资控股集团有限公司 | A kind of sunk type foundation pit Yield rainfall relation system, construction method and application method |
Non-Patent Citations (1)
| Title |
|---|
| 焦营营等.智慧工地与绿色施工技术.中国矿业大学出版社,2019,第153页-第155页. * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN111236284A (en) | 2020-06-05 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN111236284B (en) | A method and structure for draining groundwater from the bottom and surrounding areas of a basement | |
| CN102454167A (en) | Construction method of large ultra-deep open caisson | |
| CN216640547U (en) | Drainage decompression anti-floating system suitable for weak permeable soft soil stratum | |
| CN103741714A (en) | Full-cover excavation top-down construction method for underground engineering | |
| CN212896422U (en) | Deep foundation pit water intercepting and draining device | |
| CN112095644A (en) | A deep foundation pit interception and drainage device and its construction method | |
| CN114411756A (en) | Construction method and construction device for open-cut foundation pit of water-rich sand layer subway station without precipitation | |
| CN105672450A (en) | Laying method for large-aperture water draining pipeline parallel to upper part of existing metro tunnel structure | |
| CN115748774A (en) | Non-closed dewatering system for deep foundation pit plate lowering area in water-rich area and construction method | |
| CN108035379B (en) | Comprehensive pipe gallery and construction method thereof | |
| CN108708383A (en) | A kind of plant-growing type eco-concrete bank protection and its construction method | |
| CN117926895A (en) | Reverse construction process for reverse hanging well | |
| CN116446434A (en) | Construction method of open caisson with water-rich sand layer | |
| CN113445525B (en) | Method and structure for controlling water pressure of bottom plate in construction of bottom plate of foundation pit of deep foundation pit | |
| CN115748345A (en) | Construction method suitable for widening roadbed in adjacent pond section | |
| CN115045311A (en) | Method for combining foundation pit drainage and structure anti-floating | |
| CN104846837B (en) | The construction method of ultra-deep well in a kind of bright draining foundation ditch | |
| CN212052829U (en) | Basement bottom and groundwater all around draw row structure | |
| CN118911174A (en) | Waterproof construction method for foundation raft in deep foundation ponding area | |
| CN217325443U (en) | High groundwater water level excavation supporting cuts drainage system | |
| CN112144425B (en) | A box culvert drainage ditch pouring method located in a high water level and sandy soil environment | |
| CN215165753U (en) | Toe board low reaches foundation ditch ponding positive pump drainage facility | |
| CN116591205A (en) | Method for quick construction of sump pit in foundation pit of subway entrance and exit in water-rich sand layer | |
| CN115897759A (en) | Construction method of post-pouring belt drainage and water supply circulation system on bottom of deep foundation pit | |
| CN221798463U (en) | Foundation pit support structure and support system for shaft construction |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |