CN212052829U - Basement bottom and groundwater all around draw row structure - Google Patents

Abstract

The utility model discloses a basement bottom and periphery groundwater drainage structure, which comprises a precipitation 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); the water collecting wells (2) are connected with 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), and the submersible pump (13) is positioned on a dewatering well bottom plate (19); the submersible pump (13) is connected with a water storage sedimentation tank (4) on the outdoor ground (7) through a water pumping pipe (15). The utility model discloses effectively solved the problem of drainage during the foundation ditch construction for construction speed turns into construction waste water and carries out water resource comprehensive utilization, plays the using water wisely and reduces construction cost's operation, reduces groundwater pressure, avoids basement bottom plate and basement outer wall seepage risk to ensure the engineering quality.

Description

Basement bottom and groundwater all around draw row structure

Technical Field

The utility model relates to a basement bottom and groundwater all around draw row structure belongs to bridge engineering prefabricated component construction technical field.

Background

With the rapid expansion of modern buildings, the construction land is gradually lacked. 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. A large number of water leakage points can appear on the bottom plate and the outer wall after the building is put into use, and the later-stage seepage-proofing and leakage-stopping difficulty is quite large. The drainage water of the prior art is adopted, the orderly development of the construction surface in the construction process can not be ensured, when the underground water level rises in the rich water period, the underground water generates pressure on the bottom plate, the basement foundation structure can be damaged, and the bottom plate and the outer wall are leaked. In addition, the water in the foundation pit, particularly the deep foundation pit, is treated and then discharged into a municipal sewage pipe network by adopting the prior art, so that the cost is high, the construction is difficult, and the water resource utilization is not facilitated. Therefore, the prior art still has shortcomings and needs to be improved.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a basement bottom and groundwater draw row structure all around to solve in the foundation ditch work progress groundwater drainage difficulty, bottom plate and basement outer wall water pressure too high lead to seepage, influence technical problem such as foundation structure quality, thereby overcome the not enough of prior art.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

the utility model discloses a basement bottom and periphery groundwater drainage structure, which comprises precipitation wells positioned at four corners of a basement and a group of water collecting wells positioned below a basement bottom plate and outside a basement outer wall; the water collecting wells are connected with precipitation wells at four corners of the basement through drainage underdrains; a submersible pump and a ball float valve are arranged in the dewatering well, and the submersible pump is positioned on the bottom plate of the dewatering well; the submersible pump is connected with a water storage sedimentation tank on the outdoor ground through a water pumping pipe.

In the underground water drainage structure at the bottom and around the basement, the drainage blind ditch is a connecting piece formed by a group of n-shaped grooves; the width of the lower opening of the n-shaped groove is 400mm, and the height is 500 mm; the middle of the bottom of the two side walls of the inverted U-shaped groove is provided with a water inlet hole with the radius of 200 mm.

In the underground water drainage structure at the bottom and around the basement, an upper geotextile is sequentially arranged between the top of the drainage blind ditch and the bottom surface of the basement bottom plate from bottom to top, and a covering soil layer is arranged on the top surface of the upper geotextile; a gravel layer, a pebble layer, a concrete cushion layer and a plain soil tamping layer are sequentially arranged below the drainage underdrain from top to bottom; wherein, the gravel layer is provided with a triangle outside the drainage blind ditch and piles up to cover the inlet opening of the drainage blind ditch.

Since the technical scheme is used, the utility model discloses compare with prior art, the utility model discloses a to bottom plate below and basement outer wall groundwater, rainwater piecemeal drainage all around collect and get into precipitation well, during outdoor retaining sedimentation tank was taken out the water to the rethread precipitation well, utilize effectively "fall arrange combine, comprehensive utilization". Thereby solved the problem of drainage during the foundation ditch construction for construction speed, turn into construction waste water and carry out water resource comprehensive utilization into the normal water, play the operation of using water wisely and reducing construction cost, reduce groundwater pressure, avoid basement bottom plate and basement outer wall seepage risk to ensure engineering quality.

Drawings

Fig. 1 is a schematic structural diagram of the present invention;

FIG. 2 is a cross-sectional elevation view of a concealed drain blind;

FIG. 3 is a schematic view of a U-shaped groove.

The figures are labeled as follows: 1-drainage underdrains, 2-water collecting wells, 3-dewatering wells, 4-water storage sedimentation tanks, 5-basement floors, 6-basement exterior walls, 7-outdoor ground, 8-concrete cushions, 9-pebble beds, 10-lower geotechnical cloth, 11-plain soil tamped layers, 12-covering soil layers, 13-submersible pumps, 14-ball valves, 15-water pumping pipes, 16-steel crawling ladders, 17-dewatering well cover plates, 18-well walls, 19-dewatering well floors, 20-water inlet holes, 21-upper geotechnical cloth, 22-gravel layers and 23-triangular stacking.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings and examples.

The utility model relates to a basement bottom and groundwater drainage method all around constitute, this method is as shown in fig. 1-3, this method is around the basement and the bottom sets up the drainage blind ditch 1 that intersects vertically and horizontally, and set up the sump pit 2 and lead to the precipitation well 3 that is located 6 four corners of basement outer wall after gathering the water from drainage blind ditch 1 temporarily at the intersection point that vertically and horizontally intersects, take out the water in precipitation well 3 to the retaining sedimentation tank 4 of outdoor ground 7 through the immersible pump 13 in precipitation well 3, the water after the sediment is recycled as the construction water.

The underground water drainage method at the bottom and around the basement comprises the following construction steps:

a. when the basement foundation pit is excavated, the foundation pit is excavated to be below 200mm of the bottom surface of the basement bottom plate 5;

b. continuously digging down to a pit 3m below the elevation of a basement bottom plate 5 at four corners of the basement outer wall 6, and then pouring a precipitation well 3 in the pit by adopting reinforced concrete;

c. tamping the bottom of the foundation pit to form a soil ramming layer 11; pouring a concrete cushion layer 8 with the thickness of 100mm on the top surface of the rammed plain soil 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 on the outer side of the basement bottom plate 5 and the basement outer wall 6 to be poured in a row-column mode;

e. laying a lower geotextile 10 on the concrete cushion layer 8, and laying a reversed filter layer on the lower geotextile 10;

f. installing a drainage blind ditch 1 on the top surface of the inverted filter layer, and connecting all the water collecting wells 2 and precipitation wells 3 positioned at four corners of the outer wall 6 of the basement into a whole through the drainage blind ditch 1 to form a drainage grid;

g. laying an upper geotextile 21 on the top surfaces of the inverted filter layer and the drainage blind ditch 1; backfilling a covering soil layer 12 on the top surface of the upper geotechnical cloth 21 to the bottom surface elevation of the basement bottom plate 5 and tamping;

h. completing concrete pouring construction of the basement bottom plate 5 and the basement outer wall 6 on the top surface of the covering soil layer 12; backfilling outside the basement outer wall 6 to the elevation of the outdoor ground 7 and tamping;

i. a water storage sedimentation tank 4 is constructed on one side of the wellhead of the dewatering well 3; and 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 the water in the dewatering well 3 to the water storage sedimentation tank 4 through a water pumping pipe 15 for sedimentation and reuse.

In the method, the drainage blind ditch 1 is paved by a finished product n-shaped groove; the width of the lower opening of the n-shaped groove is 400mm, and the height is 500 mm; the middle of the bottom of the two side walls of the n-shaped groove is provided with a semicircular hole with the radius of 200mm as a water inlet hole 20. When the drainage blind ditch 1 is paved, M10.0 cement mortar is adopted for connection between each section of the n-shaped groove and the water collecting well 2 or the dewatering well 3; the drainage underdrain 1 should be laid in a manner of keeping the middle high and the four corners low, so as to form a drainage slope of 0.5%. The inverted filter layer is composed of a pebble layer 9 and a gravel layer 22; when the gravel layer 22 is laid, the gravel layer 22 forms inclined triangular piles 23 at the bottoms of the two sides of the drainage blind ditch 1; the triangular pile 23 should cover the water inlet holes 20 on both sides of the drainage underdrain 1. When the upper geotextile 21 is laid on the gravel layer 22 and the top surface of the drainage blind ditch 1, the geotextile is laid by being tightly adhered to the top surface of the drainage blind ditch 1 and the triangular pile 23. The pouring of the dewatering well 3 adopts a sectional pouring mode, and a steel ladder stand 16 is embedded in a well wall 18 on one side of the dewatering well 3 during pouring; the first pouring height is higher than the elevation of the basement bottom plate 5 to be poured; and after the construction of the plain soil compacted layer 11, the concrete cushion layer 8, the water collecting well 2, the lower geotextile 10, the reverse filter layer and the upper geotextile 21 is completed, pouring the upper precipitation well 3 to the ground elevation.

The underground water drainage structure at the bottom and around of the basement is formed according to the method, and comprises precipitation wells 3 positioned at four corners of the basement and a group of water collecting wells 2 positioned below a basement bottom plate 5 and outside a basement outer wall 6, as shown in figures 1 to 3; the water collecting wells 2 are connected with 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 dewatering well 3, and the submersible pump 13 is positioned on a dewatering well bottom plate 19; the submersible pump 13 is connected with the water storage sedimentation tank 4 which is connected with 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 the n-shaped groove is 400mm, and the height is 500 mm; the middle of the bottom of the two side walls of the n-shaped groove is provided with a water inlet hole 20 with the radius of 200 mm. An upper geotextile 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, and a covering soil layer 12 is arranged on the top surface of the upper geotextile 21; a gravel layer 22, a pebble layer 9, a concrete cushion layer 8 and a plain soil tamping layer 11 are sequentially arranged below the drainage underdrain 1 from top to bottom; wherein, the gravel layer 22 is provided with a triangular pile 23 outside the drainage underdrain 1 to cover the water inlet 20 of the drainage underdrain 1.

Examples

As shown in fig. 1 to 3, the configuration of this example includes: the drainage blind ditch 1, the water collecting well 2, the dewatering well 3, the water storage sedimentation tank 4, the underground water of the foundation pit and the rainwater are distributed below a basement bottom plate 5 in a grid shape through the drainage blind ditch 1 and are arranged along the periphery of a basement outer wall 6 for drainage, then the water is temporarily collected through the water collecting well 2 arranged at the intersection of the drainage blind ditch 1 in a hidden mode, then the water is gradually drained into the dewatering well 3 at four corners of the basement outer wall 6 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 and adopting a ball float valve 14, and then the water is pumped and drained into the water storage sedimentation tank of the outdoor ground 7 through a water pumping pipe 15 in the dewatering well for cyclic comprehensive utilization. The drainage blind ditch 1 adopts a finished inverted-U-shaped groove, and the positioning, pre-excavation and embedding construction is carried out according to the actual situation 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 lower soil body is mechanically or manually tamped, a concrete cushion layer 8 with the thickness of 100mm is poured on a plain soil tamping layer 11, a layer of geotextile is covered as a mud and sand separating layer, a layer of pebble layer 9 and a layer of crushed stone 22 are laid at the bottom of the inverted U-shaped groove to serve as an inverted filter layer, the inverted U-shaped groove is then laid, and M10.0 cement mortar is adopted for fixing the connection of the inverted U-shaped groove. The vertical drainage gradient of the U-shaped groove is 0.5%, and the pebble layer 9 and the gravel layer 22 are laid on two sides of the U-shaped groove to form a triangular pile 23, and a layer of geotechnical cloth is covered as a mud-isolating sand layer. And then filling a covering soil layer 12 in the inverted U-shaped groove, and then performing the process construction of the basement bottom plate. Underground water and rainwater of the foundation pit enter the drainage blind ditch 1 in blocks and are guided and drained to the water collecting well 2. The side wall of the water collecting well 2 is built by sand lime bricks, the cover plate is made of reinforced concrete precast slabs, the size of the hidden water collecting well 2 is 1.0m in height, 1.0m in width and 1.5m in length, and the water collecting well 2 is arranged at the intersection of the drainage blind ditches 1. The periphery of the basement outer wall 6 is provided with the dewatering well 3, the dewatering well 3 is of a reinforced concrete structure, the inner side surface of the dewatering well 3 is provided with a basement shear wall side wall, the bottom of the dewatering well 3 is 3m lower than the elevation of the basement bottom plate, the size is 2m in width and 2m in length, and the height is reduced from the elevation of the bottom plate by 3m to the elevation of the outdoor ground. The dewatering well 3 is constructed synchronously along with the connected basement outer wall 6. Underground water and rainwater of the foundation pit are drained into the precipitation well 3 through the drainage blind ditch 1 and the collection well 2. A submersible pump 13 with the model is arranged at the bottom of the dewatering well 3 according to the water quantity, a DN100 galvanized steel pipe is arranged on the dewatering well 3 and is used as a water pumping pipe 15 to pump the water body from the dewatering well 3 to a water storage sedimentation tank 4 of the outdoor ground 7, and a ball float valve 14 is adopted to control the elevation of the water level in the dewatering well 3. The water pumped to the water storage sedimentation tank 4 can be subjected to sedimentation treatment to comprehensively utilize water resources according to on-site actual construction.

The utility model discloses a to bottom plate below and basement outer wall groundwater, rainwater piecemeal drainage collect and get into precipitation well all around, the rethread precipitation well takes the water out outdoor retaining sedimentation tank, effectively utilizes the thought that "fall row combines, utilizes multipurposely". Thereby solved the problem of drainage during the foundation ditch construction for construction speed, turn into construction waste water and carry out water resource comprehensive utilization into the normal water, play the operation of using water wisely and reducing construction cost, reduce groundwater pressure, avoid basement bottom plate and basement outer wall seepage risk to ensure engineering quality.

Claims (3)

1. A basement bottom and periphery underground water drainage 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); the method is characterized in that: the water collecting wells (2) are connected with 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), and the submersible pump (13) is positioned on a dewatering well bottom plate (19); the submersible pump (13) is connected with a water storage sedimentation tank (4) on the outdoor ground (7) through a water pumping pipe (15).

2. The basement bottom and periphery groundwater drainage structure of claim 1, characterized in that: the drainage blind ditch (1) is a connecting piece formed by a group of n-shaped grooves; the width of the lower opening of the n-shaped groove is 400mm, and the height is 500 mm; the middle of the bottom of the two side walls of the n-shaped groove is provided with a water inlet hole (20) with the radius of 200 mm.

3. The basement bottom and periphery groundwater drainage structure of claim 1, characterized in that: an upper geotextile (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, and a covering soil layer (12) is arranged on the top surface of the upper geotextile (21); a gravel layer (22), a pebble layer (9), a concrete cushion layer (8) and a plain soil tamping layer (11) are sequentially arranged below the drainage underdrain (1) from top to bottom; wherein, the gravel layer (22) is provided with a triangular pile (23) outside the drainage blind ditch (1) to cover the water inlet hole (20) of the drainage blind ditch (1).

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