CN214993978U

CN214993978U - Quick drainage system of deep foundation pit

Info

Publication number: CN214993978U
Application number: CN202120684201.3U
Authority: CN
Inventors: 王立军; 陈礼平; 林诚; 陈笑; 商玉宽
Original assignee: Dongguan Jianan Group Co ltd
Current assignee: Dongguan Jianan Group Co ltd
Priority date: 2021-04-02
Filing date: 2021-04-02
Publication date: 2021-12-03
Anticipated expiration: 2031-04-02

Abstract

The utility model relates to a foundation ditch drainage field, more specifically says that it relates to a quick drainage system of deep basal pit, and it includes the sump pit, C20 concrete bed course has been laid to the bottom of sump pit, the infiltration hole has been seted up to the upper surface of C20 concrete bed course, be provided with the drain bar in the infiltration hole, the drain bar includes the boss, the upper surface of boss is seted up flutedly, set up the first filtration pore of crossing of a plurality of on the boss. This application can improve drainage system's drainage efficiency.

Description

Quick drainage system of deep foundation pit

Technical Field

The application relates to the field of foundation pit drainage, in particular to a quick drainage system of a deep foundation pit.

Background

With the rapid development of the building industry, high-rise buildings and super high-rise buildings are increasing, and the upper load of the high-rise buildings and the super high-rise buildings is large. In order to increase the stability of the foundation support, the depth of the foundation pit must be increased. In the process of excavating the deep foundation pit, in the area with a higher ground water level, a soil water-bearing layer is often cut off, and the ground water can continuously infiltrate into the foundation pit from the inner side wall of the foundation pit. During construction in rainy period, ground water also flows into the pit. In order to ensure the normal operation of construction and prevent the collapse of a side slope and the reduction of the bearing capacity of a foundation, foundation pit dewatering work must be well done. A common drainage method for foundation pits is open trench drainage. The concrete implementation method of open ditch drainage comprises the following steps: a drainage ditch is dug around the bottom of the foundation pit, a water collecting well is dug in the drainage ditch, water flows into the water collecting well under the action of gravity, and then the water in the water collecting well is pumped out of the pit through a water pump.

Referring to fig. 1 and 2, in the process of performing open trench drainage in the related art, when a foundation pit is dug to a base elevation, C20 plain concrete 1 is laid at the bottom of a drainage ditch 6, annular bricks 2 are laid on two opposite sides of the drainage ditch 6, and M5 waterproof mortar 3 is laid on the upper surface of the C20 plain concrete 1 and the inner side wall of the C20 plain concrete 1; the bottom of the water collecting well 7 is paved with a C20 concrete cushion layer 4, the upper surface of the C20 concrete cushion layer 4 is paved with an annular brick 2, and the inner side wall of the brick 2 and the upper surface of the C20 concrete cushion layer 4 are paved with cement mortar 5.

In view of the above-mentioned related art, the groundwater cannot permeate into the drainage ditch 6 through the C20 plain concrete 1 and the brick 2, and the groundwater cannot permeate into the water collecting well 7 through the C20 concrete cushion layer 4 and the brick 2, so the water collecting well 7 can only collect surface water in the foundation pit, and cannot collect groundwater in the foundation pit, and therefore the drainage system cannot drain the groundwater in the foundation pit, and the drainage efficiency of the drainage system is low.

SUMMERY OF THE UTILITY MODEL

In order to improve drainage system's drainage efficiency, this application provides a quick drainage system of deep basal pit.

The application provides a quick drainage system of deep basal pit adopts following technical scheme:

the utility model provides a quick drainage system of deep basal pit, includes the sump pit, the C20 concrete bed course has been laid to the bottom of sump pit, the infiltration hole has been seted up to the upper surface of C20 concrete bed course, be provided with the drain bar in the infiltration hole, the drain bar includes the boss, the upper surface of boss is seted up flutedly, set up the first filtration hole of a plurality of on the boss.

Through adopting above-mentioned technical scheme, the groundwater of sump pit bottom can permeate the sump pit through the infiltration hole in, the first filter pore of a plurality of on the drain bar has the filtering action to groundwater, can restrict the earth of sump pit bottom and arrange to the sump pit along with groundwater in to make drainage system not only can discharge the surface water in the escape canal, also can discharge the inside groundwater of foundation ditch, improved drainage system's drainage efficiency.

Optionally, the lower surface of the boss is fixedly provided with geotextile.

Through adopting above-mentioned technical scheme, geotechnological cloth can prevent the earth particle in the infiltration hole to pass through to restricted the earth particle and blockked up the first filtration hole on the drain bar, improved the drainage efficiency of drain bar.

Optionally, a filter block is arranged in the water seepage hole, the filter block is located below the geotextile, the lower surface of the filter block abuts against the bottom end of the water collecting well, and a plurality of second filter holes are formed in the filter block.

By adopting the technical scheme, the filter block has further filtering effect on underground water, and has pressing effect on the bottom of the water collecting well, so that soil at the bottom of the water collecting well can be further limited to be discharged into the water collecting well along with underground water.

Optionally, the drain board further comprises a positioning portion, the positioning portion is fixedly arranged at the top end of the boss, a positioning groove is formed in the upper surface of the cement mortar, and the positioning portion is in clamping fit with the positioning groove.

Through adopting above-mentioned technical scheme, the constant head tank has the locate function to location portion to have the locate function to the drain bar, increased the stability that the drain bar was installed in the infiltration hole.

Optionally, the upper surface of the filter block abuts against the lower surface of the geotextile.

Through adopting above-mentioned technical scheme, the filter block is to the ascending supporting role of geotechnological cloth to the ascending supporting role of boss, and then to the ascending supporting role of drain bar, increased the stability of drain bar installation in the infiltration hole.

Optionally, a water filtering layer is filled between the filter block and the drainage plate.

Through adopting above-mentioned technical scheme, the drainage layer has further filtering action to groundwater to make still less earth arrange from the bottom of sump pit and send to in the sump pit.

Optionally, the water filtration layer is a plurality of cobbles.

By adopting the technical scheme, the cobblestones have high hardness and are not easy to break; meanwhile, the cobblestones have downward pressure effect on the filter block, so that the stability of the filter block arranged in the water seepage hole is further improved.

Optionally, the material of the filter block is ceramic.

By adopting the technical scheme, the ceramic has high hardness and is not easy to deform, and the stability of the drain board placed on the surface of the filter block is improved.

In summary, the present application includes at least one of the following beneficial technical effects:

1. the underground water at the bottom of the water collecting well can permeate into the water collecting well through the water seepage holes, the plurality of first filter holes on the drainage plate have a filtering effect on the underground water, and soil at the bottom of the water collecting well can be limited to be drained into the water collecting well along with the underground water, so that the drainage system can drain surface water in a drainage ditch and underground water in a foundation pit, and the drainage efficiency of the drainage system is improved;

2. the geotextile can prevent soil particles in the water seepage holes from passing through, so that the soil particles are limited from blocking the first filtering holes on the drainage plate, and the drainage efficiency of the drainage plate is improved;

3. the filter block has an upward supporting effect on the geotextile, so that the boss has an upward supporting effect, the drainage plate has an upward supporting effect, and the stability of the drainage plate in the water seepage hole is improved.

Drawings

Fig. 1 is a sectional view of a drainage ditch in the related art.

Fig. 2 is a sectional view of a sump well in the related art.

Fig. 3 is a sectional view of a rapid drainage system for a deep foundation pit according to an embodiment of the present application.

Fig. 4 is a cross-sectional view of a water collection well in an embodiment of the present application.

Fig. 5 is a partially enlarged view of a portion a in fig. 4.

Fig. 6 is a schematic view showing the assembly relationship of the drain board, the geotextile and the filter block in the embodiment of the present application.

Description of reference numerals: 1. c20 plain concrete; 2. bricking; 3. m5 waterproof mortar; 4. c20 concrete cushion; 41. a water seepage hole; 5. cement mortar; 51. positioning a groove; 6. a drainage ditch; 7. a water collecting well; 8. a drain plate; 81. a boss; 811. a groove; 812. a first filtering hole; 82. a positioning part; 9. geotextile; 10. a filter block; 101. a second filtering hole; 11. filtering a water layer; 12. a drain pipe; 13. and (4) a water pump.

Detailed Description

The present application is described in further detail below with reference to figures 3-6.

The embodiment of the application discloses quick drainage system of deep basal pit. Referring to fig. 3, the rapid drainage system of the deep foundation pit comprises drainage ditches 6 arranged around the bottom of the foundation pit and water collecting wells 7 arranged at intervals in the drainage ditches 6, and further comprises a water pump 13 and a drainage pipe 12, wherein the bottom end of the drainage pipe 12 is located in the water collecting wells 7, and the top end of the drainage pipe 12 is fixedly connected with the water pump 13. Because the bottom of escape canal 6 is less than the bottom of foundation ditch, and the bottom of sump pit 7 is less than the bottom of escape canal 6, therefore the surface water in the foundation ditch can flow into escape canal 6, and then flow into sump pit 7 in, is taken away by water pump 13 at last.

Referring to fig. 4 and 5, a C20 concrete cushion 4 is laid at the bottom of the water collecting well 7, and a water seepage hole 41 is opened on the upper surface of the C20 concrete cushion 4. The groundwater thus flows into the sump 7 through the weep holes 41 and is finally pumped away by the pump 13.

Referring to fig. 5 and 6, in order to filter the groundwater conveniently, a filter block 10 is disposed in the weep hole 41, the filter block 10 is shaped like a cylinder, the length direction of the axis of the filter block 10 is vertical, and the height of the filter block 10 is smaller than the depth of the weep hole 41. The arc side wall of the filter block 10 is abutted against the inner side wall of the water seepage hole 41, and the lower surface of the filter block 10 is flush with the lower surface of the C20 concrete cushion layer 4. The upper surface of the filter block 10 is provided with a plurality of second filter holes 101, which penetrate through the second filter holes, so that the filter block 10 has a filtering effect on the groundwater. In this embodiment, the material of the filter block 10 is ceramic.

With continued reference to fig. 5 and 6, a drain plate 8 is disposed in the water penetration hole 41, the drain plate 8 includes a boss 81, a groove 811 is formed on an upper surface of the boss 81, and a plurality of first filtering holes 812 are formed on a lower surface of the boss 81. In order to enhance the filtering effect on the groundwater, the lower surface of the boss 81 is also glued with a geotextile 9. The upper surface of the filter block 10 abuts against the lower surface of the geotextile 9. So set up, filter block 10 is to the ascending supporting role of geotechnological cloth 9 to the ascending supporting role of boss 81, increased the stability that drain bar 8 installed in infiltration hole 41. The geotextile 9 can prevent the soil particles in the seepage holes 41 from passing through, thereby limiting the soil particles from blocking the first filtering holes 812 on the drainage plate 8 and improving the drainage efficiency of the drainage plate 8.

With continued reference to fig. 5 and 6, in order to further increase the stability of the installation of the drain plate 8, the drain plate 8 further includes a positioning portion 82, the positioning portion 82 is integrally formed on the outer side wall of the top end of the boss 81, and the horizontal cross section of the positioning portion 82 is circular. Positioning groove 51 is opened to the upper surface of cement mortar 5, and location portion 82 and positioning groove 51 joint cooperation, the upper surface of location portion 82 and the upper surface of cement mortar 5 flush. A water filtering layer 11 is filled between the filter block 10 and the drain plate 8. The water filtering layer 11 is a plurality of cobbles. The cobblestones have high hardness and are not easy to break; meanwhile, the cobblestones exert downward pressure on the filter block 10, so that the stability of the filter block 10 installed in the water seepage holes 41 is further improved.

The implementation principle of the rapid drainage system of the deep foundation pit in the embodiment of the application is as follows: in the process that the underground water flows to the water collecting well 7 from the seepage holes 41, the underground water is sequentially filtered by the filter blocks 10, the cobblestones and the drainage plates 8, so that the soil at the bottom of the foundation pit is limited to flow into the water collecting well 7 along with the underground water; meanwhile, surface water in the foundation pit flows into the water collecting well 7 through the drainage ditch 6, and finally the water pump 13 pumps away the surface water and the underground water in the water collecting well 7 together.

The above embodiments are preferred embodiments of the present application, and the protection scope of the present application is not limited by the above embodiments, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.

Claims

1. The utility model provides a quick drainage system of deep basal pit which characterized in that: including sump pit (7), C20 concrete bed course (4) have been laid to the bottom of sump pit (7), infiltration hole (41) have been seted up to the upper surface of C20 concrete bed course (4), be provided with drain bar (8) in infiltration hole (41), drain bar (8) are including boss (81), the upper surface of boss (81) is seted up flutedly (811), a plurality of first filtration hole (812) have been seted up on boss (81).

2. The rapid drainage system of a deep foundation pit according to claim 1, wherein: the lower surface of the boss (81) is fixedly provided with geotextile (9).

3. The rapid drainage system of a deep foundation pit according to claim 2, wherein: be provided with in infiltration hole (41) and filter block (10), filter block (10) are located geotechnological cloth (9)'s below, the lower surface butt of filter block (10) in the bottom of sump pit (7), filter block (10) are last to have seted up a plurality of second and to have filtered hole (101).

4. The rapid drainage system of a deep foundation pit according to claim 1, wherein: the drainage plate (8) further comprises a positioning portion (82), the positioning portion (82) is fixedly arranged at the top end of the boss (81), a positioning groove (51) is formed in the upper surface of the cement mortar (5), and the positioning portion (82) is in clamping fit with the positioning groove (51).

5. The rapid drainage system of a deep foundation pit according to claim 3, wherein: the upper surface of the filter block (10) is abutted against the lower surface of the geotextile (9).

6. The rapid drainage system of a deep foundation pit according to claim 1, wherein: and a water filtering layer (11) is filled between the filter block (10) and the drainage plate (8).

7. The rapid drainage system of a deep foundation pit according to claim 6, wherein: the water filtering layer (11) is a plurality of cobbles.

8. The rapid drainage system of a deep foundation pit according to claim 1, wherein: the filter block (10) is made of ceramic.