CN214460547U - Precipitation structure of existing building deep basal pit - Google Patents
Precipitation structure of existing building deep basal pit Download PDFInfo
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- CN214460547U CN214460547U CN202022747368.8U CN202022747368U CN214460547U CN 214460547 U CN214460547 U CN 214460547U CN 202022747368 U CN202022747368 U CN 202022747368U CN 214460547 U CN214460547 U CN 214460547U
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Abstract
The utility model discloses an existing precipitation structure of building deep basal pit, include: the bottom wall is provided with a first step surface, and the bottom wall is downwards sunken to form a second step surface; a secondary water stopping barrier is arranged downwards at the joint of the first step surface and the second step surface; the side wall is vertically and fixedly connected with the edge of the bottom wall; the bottom plate is positioned on the outer side of the side wall and connected with the side wall, and a primary water stopping barrier is arranged downwards on the bottom plate; a plurality of first water pumping assemblies are arranged between the first-stage water stopping barrier and the side walls, and a plurality of second water pumping assemblies are arranged on the second step surfaces downwards. In this application, the light-duty vacuum well that seals to arrange through cascaded annular cuts off water and comes the combination setting of precipitation through precipitation pipe well to existing building deep basal pit groundwater control is carried out to simple precipitation measure, makes groundwater level control below the excavation face.
Description
Technical Field
The utility model relates to an existing building construction technical field especially relates to a precipitation structure of existing building deep basal pit.
Background
The effective control of underground water is the precondition guarantee for the construction of the basement of the deep foundation pit. With the development of green construction technology and the change of development mode of the construction industry, one wave of heat tide of existing building transformation is raised in China. The large-scale reconstruction project usually relates to basement reconstruction, and the first premise of the reconstruction is to make underground water control of an existing basement deep foundation pit.
Compared with the mature underground water control technology of 'stopping water firstly → lowering water' of a conventional newly-built deep foundation pit, the existing building deep foundation pit construction often faces the problems that underground backfill obstacles are more, underground hydrological conditions are affected by an existing foundation structure and become complicated and irregular, and the like, so that the forming quality of a water-stopping curtain is extremely poor, even the construction is difficult to form a water-stopping effect, the absorption seepage flow under a foundation slab is difficult to control, and the like. How to accomplish the groundwater control under the complicated hydrological condition by the 'precipitation' measure on the premise of lacking the 'water stopping' measure, the safety of the deep foundation pit is concerned, and whether the existing building transformation can be smoothly promoted.
Disclosure of Invention
Not enough to the above of prior art, the utility model aims to solve the technical problem that a precipitation structure of existing building deep basal pit is proposed for seam crossing seepage scheduling problem during secondary construction among the solution prior art.
The utility model provides a technical scheme that its technical problem adopted is a precipitation structure of existing building deep basal pit, include:
the bottom wall is provided with a first step surface, and the bottom wall is downwards sunken to form a second step surface; a secondary water stopping barrier is arranged downwards at the joint of the first step surface and the second step surface;
the side wall is vertically and fixedly connected with the edge of the bottom wall;
the bottom plate is positioned on the outer side of the side wall and connected with the side wall, and a primary water stopping barrier is arranged downwards on the bottom plate;
a plurality of first water pumping assemblies are arranged between the first-stage water stopping barrier and the side walls, and a plurality of second water pumping assemblies are arranged on the second step surfaces downwards.
Preferably, the primary water stopping barrier comprises a plurality of first vacuum lightweight wells, the first vacuum lightweight wells are uniformly distributed on the periphery of the existing building, and the first vacuum lightweight wells are sequentially connected end to end.
Preferably, the interval between any adjacent two first vacuum lightweight wells is 400 mm.
Preferably, the secondary water stopping barrier comprises a plurality of second vacuum light wells, the second vacuum light wells are uniformly distributed at the joint of the first step surface and the second step surface, and the second vacuum light wells are sequentially connected end to end.
Preferably, the interval between any adjacent two second vacuum lightweight wells is 400 mm.
Preferably, the distance between any two adjacent first water pumping assemblies and the distance between any two adjacent water pumping assemblies are both 15m-20 m.
Compared with the prior art, the utility model discloses following beneficial effect has at least:
the light vacuum well arranged in a stepped annular sealing manner is used for intercepting water and is used for dewatering through the dewatering pipe well, and the underground water level of the deep foundation pit of the existing building is controlled by a simple dewatering measure, so that the underground water level is controlled below the excavation surface. The method ensures the safety of the deep foundation pit and the smooth operation of the existing building transformation, solves the problems of difficult treatment of underground obstacles and difficult construction of waterproof curtains of the deep foundation pit of the transformation project, saves the construction cost, realizes the green construction of underground water control and has higher economic benefit.
Drawings
FIG. 1 is a sectional view of a precipitation structure in an embodiment;
FIG. 2 is a top view of an embodiment of a precipitation structure;
in the figure:
100. a bottom wall; 110. a first step surface; 120. a second step surface;
200. a side wall;
300. a base plate;
400. a primary water-stopping barrier; 410. a first vacuum light well;
500. a secondary water-stopping barrier; 510. a second vacuum light well;
600. a first water pumping assembly;
700. and the second water pumping assembly.
Detailed Description
The following are specific embodiments of the present invention and the accompanying drawings are used to further describe the technical solution of the present invention, but the present invention is not limited to these embodiments.
Referring to fig. 1-2, the utility model discloses a precipitation structure of existing building deep basal pit, include:
a bottom wall 100 having a first step surface 110, the bottom wall 100 being recessed downward to form a second step surface 120; a secondary water stopping barrier 500 is arranged downwards at the joint of the first step surface 110 and the second step surface 120;
the side wall 200 is vertically and fixedly connected with the edge of the bottom wall 100;
the bottom plate 300 is positioned on the outer side of the side wall 200 and connected with the side wall 200, and a primary water stopping barrier 400 is arranged below the bottom plate 300;
a plurality of first water pumping assemblies 600 are arranged between the first-stage water stopping barrier 400 and the side wall 200, and a plurality of second water pumping assemblies 700 are arranged on the second step surface 120 downwards.
The foundation pit structure is shown in fig. 1-2, and is in a step shape and provided with a first step surface 110 and a second step surface 120 lower than the first step surface 110 in height; in the precipitation construction, first, the first pumping assembly 600 lowers the water level to a level equal to or lower than the first step surface 110, and then the second pumping assembly 700 lowers the water level to a level equal to or lower than the second step surface 120; and then realize the precipitation to deep basal pit, make its water level be less than the work plane's during the transformation construction height, guaranteed the prerequisite of secondary construction.
The primary water-stopping barrier 400 and the secondary water-stopping barrier 500 are arranged to separate the area where the water level is to be reduced from other areas, so that water in other areas is prevented from flowing into the area where the water level is to be reduced, and the water pumping efficiency when the water level is reduced is improved; while also facilitating keeping the lowered water level from rising.
The primary water stopping barrier 400 includes a plurality of first vacuum lightweight wells 410, the plurality of first vacuum lightweight wells 410 are uniformly distributed on the periphery of the existing building, and the plurality of first vacuum lightweight wells 410 are sequentially connected end to end.
It should be noted that, as the number of general original foundation pit bolting and shotcrete supporting structures and backfill barriers is large, the waterproof curtain is difficult to construct, and the inner and outer foundation pits are missing from the waterproof barrier. This structure is under the condition that does not have the stagnant water structure, and ingenious adoption first vacuum lightweight well 410 and second vacuum lightweight well 510 replace the waterproof curtain and regard as the effect of intercepting stagnant water protective screen, then carry out precipitation transformation to existing building deep basal pit. The method has very important value in the secondary reconstruction construction process of the deep foundation pit.
The interval between any adjacent two first vacuum lightweight wells 410 is 400 mm.
The secondary water stopping barrier 500 includes a plurality of second vacuum light wells 510, the plurality of second vacuum light wells 510 are uniformly distributed at the connection between the first step surface 110 and the second step surface 120, and the plurality of second vacuum light wells 510 are sequentially connected end to end.
The interval between any adjacent two second vacuum lightweight wells 510 is 400 mm.
The distance between any two adjacent first water pumping assemblies 600 and the distance between any two adjacent water pumping assemblies are both 15m-20 m.
Generally speaking, under the condition that the existing building deep foundation pit lacks the water stopping measure, the combination setting of cutting off water and coming precipitation through the precipitation pipe well through the light vacuum well of cascaded annular seal arrangement carries out existing building deep foundation pit groundwater control with simple precipitation measure, makes the groundwater level control below the excavation face. The method ensures the safety of the deep foundation pit and the smooth operation of the existing building transformation, solves the problems of difficult treatment of underground obstacles and difficult construction of waterproof curtains of the deep foundation pit of the transformation project, saves the construction cost, realizes the green construction of underground water control and has higher economic benefit.
The specific embodiments described herein are merely illustrative of the spirit of the invention. Various modifications, additions and substitutions for the specific embodiments described herein may be made by those skilled in the art without departing from the spirit of the invention or exceeding the scope of the invention as defined in the accompanying claims.
Claims (6)
1. The utility model provides an existing building deep basal pit's precipitation structure which characterized in that includes:
the bottom wall is provided with a first step surface, and the bottom wall is downwards sunken to form a second step surface; a secondary water stopping barrier is arranged downwards at the joint of the first step surface and the second step surface;
the side wall is vertically and fixedly connected with the edge of the bottom wall;
the bottom plate is positioned on the outer side of the side wall and connected with the side wall, and a primary water stopping barrier is arranged downwards on the bottom plate;
a plurality of first water pumping assemblies are arranged between the first-stage water stopping barrier and the side walls, and a plurality of second water pumping assemblies are arranged on the second step surfaces downwards.
2. The dewatering structure for the deep foundation pit of the existing building according to claim 1, wherein the primary water stopping barrier comprises a plurality of first vacuum lightweight wells, the plurality of first vacuum lightweight wells are uniformly distributed on the periphery of the existing building, and the plurality of first vacuum lightweight wells are sequentially connected end to end.
3. The dewatering structure for the existing deep foundation pit of building according to claim 2, wherein the interval between any two adjacent first vacuum lightweight wells is 400 mm.
4. The dewatering structure for the existing building deep foundation pit according to claim 1, wherein the secondary water stopping barrier comprises a plurality of second vacuum light wells, the plurality of second vacuum light wells are uniformly distributed at the joint of the first step surface and the second step surface, and the plurality of second vacuum light wells are sequentially connected end to end.
5. A dewatering structure for an existing deep foundation pit of building according to claim 4, wherein the interval between any two adjacent second vacuum lightweight wells is 400 mm.
6. The dewatering structure for the existing deep foundation pit of building according to any one of claims 1 to 5, wherein the distance between any two adjacent first pumping modules and the distance between any two adjacent pumping modules are both 15m to 20 m.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022747368.8U CN214460547U (en) | 2020-11-24 | 2020-11-24 | Precipitation structure of existing building deep basal pit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022747368.8U CN214460547U (en) | 2020-11-24 | 2020-11-24 | Precipitation structure of existing building deep basal pit |
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| Publication Number | Publication Date |
|---|---|
| CN214460547U true CN214460547U (en) | 2021-10-22 |
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| CN202022747368.8U Active CN214460547U (en) | 2020-11-24 | 2020-11-24 | Precipitation structure of existing building deep basal pit |
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- 2020-11-24 CN CN202022747368.8U patent/CN214460547U/en active Active
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