CN218148464U - Hierarchical precipitation structure of waterproof intermediate layer of deep basal pit - Google Patents

Abstract

The application discloses hierarchical dewatering structure of the waterproof intermediate layer of deep basal pit, concretely relates to hierarchical dewatering field of the waterproof intermediate layer of deep basal pit, this application includes the dewatering well of seting up at foundation ditch construction ground surface, there is silty clay below foundation ditch construction ground, the inside parcel of silty clay has silt matter clay layer and foundation ditch bed course, position around the foundation ditch construction ground surface dewatering well is equipped with the support frame, the internally mounted of dewatering well has hierarchical dewatering structure, hierarchical dewatering structure includes the well point pipe, and this application has reached when the regional underground of foundation ditch construction exists the waterproof intermediate layer that constitutes by silt matter clay layer, can make the groundwater of the upper and lower both sides of waterproof intermediate layer flow into the both sides of the intraductal division board of well point respectively with the help of hierarchical dewatering structure to make the groundwater of waterproof intermediate layer below discharge by deep groundwater downcomer, and the groundwater of waterproof intermediate layer top is discharged by shallow layer downcomer.

Description

Hierarchical precipitation structure of waterproof intermediate layer of deep basal pit

Technical Field

The application relates to the field of deep foundation pit waterproof interlayer grading precipitation, in particular to a deep foundation pit waterproof interlayer grading precipitation structure.

Background

A deep foundation pit generally refers to a pit excavated to a depth of more than 5 meters. The method comprises the following steps of selecting a plurality of proper well digging points according to the distribution of the underground water on site, digging a dewatering well at the well digging points, then lowering a well point pipe into the dewatering well, then filling a support material between the well point pipe and the dewatering well, arranging a support frame on the ground, then carrying out well washing operation to keep smooth drainage in the well point pipe, finally extending one end of the dewatering pipe into the well point pipe, and connecting the other end of the dewatering pipe with a water suction pump, thus carrying out drainage operation on the foundation pit construction area.

In actual conditions, there is the waterproof intermediate layer that comprises silt matter muck layer in foundation ditch construction area's underground, and waterproof intermediate layer is located well point pipe middle part, when cuting precipitation circuit, can lead to the precipitation pipe to be difficult for discharging the groundwater more than the impervious bed to take place easily when constructor begins to excavate the earthwork, the soil body in foundation ditch construction area still keeps more moisture, and then hinders the construction and causes the condition of potential safety hazard.

Under the condition of the prior art, when a waterproof interlayer composed of a silt clay layer exists in the underground of a foundation pit construction area, a constructor usually adds a shallow precipitation well and a precipitation facility on the waterproof interlayer to realize the effect of graded precipitation. Although the treatment method can well complete the precipitation work on the two sides of the waterproof interlayer, a new precipitation well needs to be excavated and a new precipitation facility needs to be arranged, wherein the construction period of the precipitation work of the deep foundation pit can be prolonged by excavating the new precipitation well and arranging a new precipitation structure, and the new precipitation facility needs higher construction cost, so that certain inconvenience is caused to the precipitation work of the deep foundation pit.

SUMMERY OF THE UTILITY MODEL

Although this application can accomplish the hierarchical precipitation work to the deep basal pit betterly for solving the processing method under the prior art condition, nevertheless need excavate new precipitation well and set up new precipitation facility, excavate new precipitation well and set up the construction period that new precipitation structure can prolong deep basal pit precipitation work wherein, and new precipitation facility need prepare more equipment, has brought a kind of deep basal pit waterproof intermediate layer hierarchical precipitation structure that the problem of certain inconvenience has been brought about to the precipitation work of deep basal pit.

In order to achieve the purpose, the following technical scheme is adopted in the application: the utility model provides a hierarchical dewatering structure of impervious intermediate layer of deep basal pit, includes the dewatering well of seting up on foundation pit construction ground surface, there is silty clay below foundation pit construction ground, the inside parcel of silty clay has silt matter muck and foundation ditch bed course, position around the foundation pit construction ground surface dewatering well is equipped with the support frame, the internally mounted of dewatering well has hierarchical dewatering structure, hierarchical dewatering structure includes well point pipe, the upper end and the support frame fixed connection of well point pipe, the lower extreme fixedly connected with filter tube of well point pipe, two square pipes of arc surface fixedly connected with of well point pipe, two square pipe and the intraductal intercommunication of well point, two the one end fixedly connected with filter plate that square pipe kept away from each other, a plurality of filtration pore has evenly been seted up on the surface of well point pipe, the inside fixedly connected with division board of well point pipe, the inside of well point pipe is equipped with deep dewatering pipe and shallow layer dewatering pipe, the lower extreme of deep dewatering pipe runs through the division board and inserts the filter tube, the side pipe is located the position between foundation pit construction ground and the muck layer, the filter tube is located the position of muck below the ground.

The effect that above-mentioned part reaches is: when a waterproof interlayer formed by a muddy clay layer exists in the underground of a foundation pit construction area, the underground water on the upper side and the lower side of the waterproof interlayer can respectively flow into two sides of a well point in-pipe partition plate by means of a graded precipitation structure, so that the underground water below the waterproof interlayer is discharged by a deep precipitation pipe, the underground water above the waterproof interlayer is discharged by a shallow precipitation pipe, and the underground water on the upper side and the lower side of the waterproof interlayer respectively flows into two sides of the well point in-pipe partition plate, so that the number of precipitation wells and new precipitation facilities required by precipitation work can be reduced, a good graded precipitation effect is kept, and the problem that although the treatment method under the prior art can well finish the graded precipitation work of a deep foundation pit, a new precipitation well needs to be excavated and a new precipitation facility needs to be arranged is solved to a certain extent, wherein the excavation of the new precipitation well and the arrangement of the new precipitation structure can prolong the construction precipitation work period of the precipitation of the deep foundation pit precipitation work, and more equipment need to be prepared by the new precipitation facility, and certain inconvenience is caused to the deep foundation pit precipitation work.

Preferably, the combined position of the well point pipe and the square pipe is matched with the size of the section of the inner wall of the dewatering well.

The effect that above-mentioned part reaches does: the underground water above the impervious interlayer can flow into the well point pipe through the square pipe.

Preferably, the lower end of the filter tube is fixedly connected with a chromium-vanadium steel block.

The effect that above-mentioned part reaches is: the effect that the well point pipe is more easily placed in a muddy precipitation well by using the characteristics of hardness and rust resistance of the chrome vanadium steel block is achieved.

Preferably, the lower pot head of chimney filter is equipped with and twines the filter screen, twine the surface of filter screen and evenly seted up the aperture.

The effect that above-mentioned part reaches is: the effect of filtering the silt along with the underground water when the underground water flows into the well point pipe is achieved, and therefore the deep precipitation pipe is prevented from being blocked to a certain extent.

Preferably, the lower surface of the partition plate is fixedly connected with a guide pipe, the upper end of the guide pipe penetrates through the partition plate, and the lower end of the deep precipitation pipe penetrates through the guide pipe.

The effect that above-mentioned part reaches is: the effect of limiting and supporting the deep downcomer is achieved, so that the deep downcomer can better discharge underground water under the waterproof interlayer.

Preferably, the lower surface of the partition plate is fixedly connected with two inclined supporting columns, and the other ends of the two inclined supporting columns are fixedly connected with the well point pipe.

The effect that above-mentioned part reaches does: the effect that the partition board is supported and the operation of the grading precipitation structure is more stable is achieved.

Preferably, the deep downcomer and shallow downcomer are rubber tubes.

The effect that above-mentioned part reaches does: the advantages of wear resistance of the rubber tube, no deformation of the water, and the like are achieved, so that the service life of the graded precipitation structure is prolonged to a certain extent.

To sum up, the beneficial effect of this application is:

when a waterproof interlayer formed by a silt clay layer exists underground in a foundation pit construction area, underground water on the upper side and the lower side of the waterproof interlayer can respectively flow into two sides of a partition plate in a well point pipe by means of a graded precipitation structure, so that the underground water below the waterproof interlayer is discharged by a deep precipitation pipe, and the underground water above the waterproof interlayer is discharged by a shallow precipitation pipe.

Drawings

Fig. 1 is a schematic perspective view of the present application.

Fig. 2 is a schematic cross-sectional structure of fig. 1 of the present application.

FIG. 3 is a schematic perspective view of a well point tubular and a screen tubular of the present application.

Fig. 4 is a schematic structural diagram at a of fig. 3 of the present application.

Fig. 5 is a schematic structural diagram at B of fig. 3 of the present application.

Description of reference numerals:

1. constructing the ground in a foundation pit; 2. powdery clay; 3. a mucky clay layer; 4. a foundation pit cushion layer; 7. a dewatering well; 6. a support frame; 5. a graded precipitation structure; 501. well point pipe; 502. a filter tube; 503. square tubes; 504. filtering the plate; 505. a partition plate; 506. a guide tube; 507. a deep downcomer pipe; 508. a shallow downcomer pipe; 509. a chrome vanadium steel block; 510. winding a filter screen; 511. oblique support post.

Detailed Description

Referring to fig. 1 and 2, this embodiment discloses a hierarchical dewatering structure of impervious intermediate layer of deep basal pit, include the dewatering well 7 of seting up on foundation ditch construction ground 1 surface, there is silty clay 2 foundation ditch construction ground 1's below, the inside parcel of silty clay 2 has silt matter clay layer 3 and foundation ditch bed course 4, wherein silt matter clay layer 3 is impervious intermediate layer, the position around the dewatering well 7 on foundation ditch construction ground 1 surface is equipped with support frame 6, the internally mounted of dewatering well 7 has hierarchical dewatering structure 5, the realization is in same dewatering well 7, simultaneously to the impervious layer carry out the effect of dewatering operation from top to bottom simultaneously.

Referring to fig. 3 and 4, the embodiment discloses that the graded precipitation structure 5 includes a well point pipe 501, the upper end of the well point pipe 501 is fixedly connected with a support frame 6, the lower end of the well point pipe 501 is fixedly connected with a filter pipe 502, the arc surface of the well point pipe 501 is fixedly connected with two square pipes 503, the two square pipes 503 are communicated with the inside of the well point pipe 501, one ends of the two square pipes 503, which are far away from each other, are fixedly connected with a filter plate 504, a plurality of filter holes are uniformly formed in the surface of the filter plate 504, a partition plate 505 is fixedly connected inside the well point pipe 501, a deep precipitation pipe 507 and a shallow precipitation pipe 508 are arranged inside the well point pipe 501, the lower end of the deep precipitation pipe 507 penetrates through the partition plate 505 and is inserted into the filter pipe 502, and the lower end of the shallow precipitation pipe 508 is positioned beside the square pipe 503. When the waterproof interlayer formed by the mucky clay layer exists in the underground of the foundation pit construction area, the underground water on the upper side and the lower side of the waterproof interlayer can respectively flow into the two sides of the partition plate 505 in the well point pipe 501 by means of the graded precipitation structure 5, so that the underground water below the waterproof interlayer is discharged by the deep precipitation pipe 507, and the underground water above the waterproof interlayer is discharged by the shallow precipitation pipe 508, and further the treatment method under the prior art condition is improved to a certain extent, although the graded precipitation work of the deep foundation pit can be well completed, a new precipitation well 7 needs to be excavated and new precipitation facilities need to be arranged, wherein the construction period of the precipitation work of the deep foundation pit can be prolonged by excavating the new precipitation well 7 and arranging the new precipitation structure, and more equipment needs to be prepared for the new precipitation facilities, so that the precipitation work of the deep foundation pit is inconvenient.

Referring to fig. 2 and 3 and fig. 5, the present embodiment discloses a square pipe 503, a partition plate 505 between the foundation pit construction ground 1 and the muddy clay 3, and a filter pipe 502 below the muddy clay 3. The underground water on the upper side and the lower side of the waterproof interlayer flows into the two sides of the partition plate 505 in the well point pipe 501 respectively, so that the number of precipitation wells 7 and precipitation facilities required by precipitation work can be reduced, a good grading precipitation effect is kept, and the joint of the well point pipe 501 and the square pipe 503 is matched with the size of the cross section of the inner wall of the precipitation well 7. The underground water above the waterproof interlayer can flow into the well point pipe 501 through the square pipe 503, and the lower end of the filter pipe 502 is fixedly connected with the chrome vanadium steel block 509. The effect that the well point pipe 501 can be placed into the muddy dewatering well 7 more easily by using the characteristic that the chrome vanadium steel block 509 is hard is achieved.

Referring to fig. 4 and 5, in the embodiment, a winding screen 510 is sleeved on the lower end of the filter tube 502, and small holes are uniformly formed on the surface of the winding screen 510. The effect of filtering the silt accompanying the groundwater when the groundwater flows into the well point pipe 501 is achieved, thereby preventing the deep downcomer 507 from being blocked to a certain extent, the lower surface of the partition plate 505 is fixedly connected with the guide pipe 506, the upper end of the guide pipe 506 penetrates through the partition plate 505, and the lower end of the deep downcomer 507 penetrates through the guide pipe 506. The effect of limiting and supporting the deep downcomer 507 so that the deep downcomer 507 can better discharge the underground water under the impervious interlayer is achieved.

Referring to fig. 4, the present embodiment discloses that two inclined supporting columns 511 are fixedly connected to the lower surface of the partition plate 505, and the other ends of the two inclined supporting columns 511 are fixedly connected to the well point pipe 501. The effect of supporting the partition plate 505 and further stabilizing the operation of the graded precipitation structure 5 is achieved, and the deep precipitation pipe 507 and the shallow precipitation pipe 508 are rubber pipes. The advantages of wear resistance of the rubber tube, no deformation of the soaking water and the like are achieved, and therefore the service life of the grading precipitation structure 5 is prolonged to a certain extent.

The working principle is as follows:

when the waterproof interlayer formed by the muddy clay layer 3 exists in the ground of the foundation pit construction area, firstly, a plurality of proper well digging points can be selected according to the distribution of the ground water on site, then the dewatering well 7 is dug at the well digging points, then the well point pipe 501 and the filter pipe 502 are lowered into the dewatering well 7, at the moment, the chrome vanadium steel block 509 below the filter pipe 502 is relatively hard, so that the well point pipe 501 is more easily placed into the muddy dewatering well 7, then, a support material is filled between the well point pipe 501 and the dewatering well 7, and a support frame 6 is arranged on the ground, at the moment, the square pipe 503 only covers a certain part of the section of the dewatering well 7 although protruding out of the well point pipe 501, so that the ground water above the waterproof interlayer can flow into the well point pipe 501 through the square pipe 503, meanwhile, the support material can conveniently fall into the lower part of the square pipe 503, and at the moment, the installation of the main body of the dewatering graded structure 5 is completed.

The installed square pipe 503 and the partition plate 505 are located between the foundation pit construction ground 1 and the silt clay layer 3, the filter pipe 502 is located below the silt clay layer 3, then the well washing operation is started until the water flow pumped out from the well point pipe 501 is clear, then the deep-layer precipitation pipe 507 is inserted into the filter pipe 502 through the partition plate 505, the shallow-layer precipitation pipe 508 is inserted into the position slightly above the partition plate, then the deep-layer precipitation pipe 507 and the upper end of the shallow-layer precipitation pipe 508 are connected with the water suction pump and the water suction pump is started, at this time, the groundwater below the impervious interlayer flows into the filter pipe 502 through the filtration of the wrapped filter screen 510, so as to be pumped out by the deep-layer precipitation pipe 507, the groundwater above the impervious interlayer flows into the area above the partition plate 505 in the well point pipe 501 through the filter plate 504, so as to be pumped out by the shallow-layer precipitation pipe 508, so as to realize the effect of simultaneously performing precipitation operation on the impervious layer up and down.

In the precipitation process, the guide pipe 506 limits and supports the deep precipitation pipe 507, so that the deep precipitation pipe 507 can better discharge underground water below the waterproof interlayer, and the inclined support column 511 supports the partition plate, so that the graded precipitation structure 5 can run more stably. Through setting up hierarchical precipitation structure 5, reached to improve the treatment method under the prior art condition to a certain extent and though can accomplish the hierarchical precipitation work to the deep basal pit betterly, nevertheless need excavate new precipitation well 7 and set up new precipitation facility, wherein excavate new precipitation well 7 and set up new precipitation structure and can prolong the construction period of deep basal pit precipitation work, and more equipment need be prepared to new precipitation facility, has caused the condition of certain inconvenience to the precipitation work of deep basal pit.

Claims (7)

1. The utility model provides a hierarchical dewatering structure of impervious intermediate layer of deep basal pit, includes precipitation well (7) of seting up on foundation ditch construction ground (1) surface, there are silty clay (2) in the below of foundation ditch construction ground (1), the inside parcel of silty clay (2) has silt matter clay layer (3) and foundation ditch bed course (4), position on foundation ditch construction ground (1) surface precipitation well (7) periphery is equipped with support frame (6), its characterized in that: the internally mounted of precipitation well (7) has hierarchical precipitation structure (5), hierarchical precipitation structure (5) are including well point pipe (501), the upper end and support frame (6) fixed connection of well point pipe (501), lower extreme fixedly connected with chimney filter (502) of well point pipe (501), the arc surface fixedly connected with two square pipes (503) of well point pipe (501), two communicate in square pipe (503) and well point pipe (501), two one end fixedly connected with filter plate (504) of keeping away from each other square pipe (503), a plurality of filtration pore has evenly been seted up on the surface of filter plate (504), the inside fixedly connected with division board (505) of well point pipe (501), the inside of well point pipe (501) is equipped with deep precipitation pipe (507) and shallow layer precipitation pipe (508), the lower extreme of deep precipitation pipe (507) runs through division board (505) and inserts filter tube (502), square pipe (503), division board (505) are located the position between foundation ditch construction clay layer (1) and the mucky clay layer (3), silt position (502) below filter tube (502) is located mucky clay layer position.

2. The deep foundation pit waterproof interlayer grading dewatering structure according to claim 1, characterized in that: the combined position of the well point pipe (501) and the square pipe (503) is matched with the size of the section of the inner wall of the dewatering well (7).

3. The deep foundation pit waterproof interlayer grading dewatering structure according to claim 1, characterized in that: the lower end of the filter tube (502) is fixedly connected with a chrome vanadium steel block (509).

4. The deep foundation pit waterproof interlayer grading dewatering structure according to claim 1, characterized in that: the lower pot head of filter tube (502) is equipped with and twines filter screen (510), twine the surface of filter screen (510) and evenly seted up the aperture.

5. The deep foundation pit waterproof interlayer grading dewatering structure according to claim 1, characterized in that: the lower surface of the partition plate (505) is fixedly connected with a guide pipe (506), the upper end of the guide pipe (506) penetrates through the partition plate (505), and the lower end of the deep downcomer (507) penetrates through the guide pipe (506).

6. The deep foundation pit waterproof interlayer grading dewatering structure according to claim 1, characterized in that: the lower surface of the separation plate (505) is fixedly connected with two inclined supporting columns (511), and the other ends of the two inclined supporting columns (511) are fixedly connected with the well point pipe (501).

7. The deep foundation pit waterproof interlayer grading precipitation structure as claimed in claim 1, wherein: the deep downcomer (507) and the shallow downcomer (508) are rubber pipes.

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