CN215563187U

CN215563187U - Anti drainage shaft that floats of basement

Info

Publication number: CN215563187U
Application number: CN202121348527.5U
Authority: CN
Inventors: 章春娣; 张凡阳; 潘书才
Original assignee: Changzhou Vocational Institute of Engineering
Current assignee: Changzhou Vocational Institute of Engineering
Priority date: 2021-06-17
Filing date: 2021-06-17
Publication date: 2022-01-18
Anticipated expiration: 2031-06-17

Abstract

The utility model discloses an anti-floating drainage well of a basement, wherein a bottom plate is arranged in the basement, post-pouring belts are arranged on the bottom plate at intervals of 30-40 m, a drainage well is arranged at the middle span section of the post-pouring belts, the drainage well comprises a drainage pump and a water collecting well formed by enclosing of a water collecting well wall plate, the drainage pump is installed in the water collecting well and connected to a discharge port through a drainage pipe, an advanced water stop belt is arranged below the post-pouring belts, a rubber water stop belt is arranged in the advanced water stop belt and provided with a water passing channel communicated with the water collecting well, the tail end of the water passing channel is a closed end, and the closed end is cut to form an internally-cut opening. The rubber waterstop of the post-cast strip can be cut off and then discharge underground water into the well, and the steel plate waterstop plays a good waterproof role in later-stage concrete plugging. The utility model relates to a simple and effective anti-floating device adopted after a basement stops dewatering at a well point.

Description

Anti drainage shaft that floats of basement

Technical Field

The utility model relates to a drainage well, in particular to a basement anti-floating drainage well with anti-floating characteristics.

Background

The anti-floating of the basement follows Archimedes' law, and the buoyancy of water is smaller than the anti-floating force of the basement. The anti-floating force of the basement is generally provided by the dead weight of concrete of the basement, the earth covering weight on the top plate of the basement and the uplift force provided by the uplift pile under the bottom plate of the basement. The weight of the soil covering on the top plate of the basement generally accounts for 50% of the total anti-floating force, and if the soil covering is not refilled in time, the anti-floating force of the basement is not easy to meet, especially in the rainy season and rich water period.

In the underground engineering construction process, well point dewatering is generally adopted and arranged in the periphery of a foundation pit and the range of a basement, the underground water level is lowered to a position 500mm below a foundation bottom plate, no water exists in the foundation pit during construction, and the dewatering is required to stop after the basement top plate is covered with soil. The construction period of the basement is long, generally about more than half a year. When other overground high-rise buildings are constructed around the basement, after the top plate of the basement is poured, the top plate of the basement is temporarily not covered with soil and is used as a material yard and a processing field of the high-rise buildings, and after the main body of the high-rise building is finished, the soil is covered. In this way, the whole precipitation cycle is about 2 years. The long-period well point dewatering cost is very high, and the construction of the basement is also influenced by the water pumping pipes arranged in the range of the foundation pit. Therefore, a common construction unit stops precipitation after the top plate of the basement is finished, and in the dry period in autumn and winter, the small water head around the basement usually meets the requirement of anti-floating. In spring and summer rich water period, the basement floats upwards sometimes. Once the basement floats, the consequences are serious.

The reason that the peripheral flood peak of basement produced is analyzed, except the confined water in the silt sand soil, mainly for the surface of earth precipitation infiltration, form soil body upper strata stagnant water, it flows down below the basement bottom plate along foundation ditch fertile groove to reach whole basement scope, namely the physical linker. After a long time, the water buoyancy acting on the bottom plate exceeds the self weight of the concrete of the bottom plate and the top plate of the basement, and the basement floats upwards. Because the basement has the dead weight of outer wall on its periphery, and the dead weight of the soil on the peripheral base plate of choosing, the buoyancy of water on the periphery is generally less than the dead weight, can not come up. Therefore, the whole basement is characterized in that the periphery is fixed, the middle floats upwards to form butterfly-shaped deformation, the adjacent columns generate vertical displacement difference, great additional force is formed for the structure, and the structure cannot bear and crack.

SUMMERY OF THE UTILITY MODEL

Aiming at the problems in the prior art, the utility model provides the anti-floating drainage well for the basement with the anti-floating characteristic.

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

the utility model provides an anti drainage well that floats of basement, be provided with the bottom plate that thickness is h in the basement, every 30 ~ 40m sets up one post-cast strip on the bottom plate, the middle span section of post-cast strip is provided with drainage well, drainage well includes the drain pump and encloses the sump pit that establishes and form by the sump pit wallboard, the drain pump is installed in the sump pit, and the drain pump passes through drain pipe connection to discharge port, the below of post-cast strip is provided with leading waterstop, be provided with the rubber waterstop in the leading waterstop, the rubber waterstop is provided with the water passing channel who communicates with the sump pit, water passing channel's end is the blind end, the blind end forms the inscribe opening after being cut.

Furthermore, a pump starting water level and a pump stopping water level are arranged in the water collecting well, an outer wall plate is arranged on the side face of the bottom plate, and a top plate is arranged at the upper end of the outer wall plate.

Furthermore, the water collecting well wall plate extends downwards into the bottom plate, and a steel plate water stop belt which transversely penetrates through the bottom plate and the post-pouring belt is arranged in the bottom plate.

Further, be provided with the bed course under the bottom plate, the upside of leading waterstop is provided with the laminating in the leading waterstop internal reinforcement of bottom plate lower surface, and the downside is provided with the laminating in the leading waterstop internal reinforcement of bed course upper surface.

Furthermore, the drain pipe extends into a pond near the site or far away from the foundation pit through the top plate of the basement.

Compared with the prior art, the utility model has the beneficial effects that:

according to the anti-floating drainage well for the basement, the rubber water stop belt is arranged on the advanced water stop belt of the post-cast belt, so that underground water can be discharged into the well after being cut, and the steel plate water stop belt in the post-cast belt has a good waterproof effect on later-stage concrete plugging. Because the anti-floating of middle span is difficult to satisfy, the below water storage capacity of bottom plate is the most, and it is most effective to set up the drainage well at the middle span section of post-cast strip. After the top plate of the basement is finished and the well point is stopped for dewatering, the rubber waterstop in the well range can be cut off, and drainage is carried out through the drainage pump. The utility model is a simple and effective anti-floating device adopted after the basement stops the well point from dewatering, has low cost and has good anti-floating effect.

Drawings

FIG. 1 is a plan view of a basement drainage well;

fig. 2 is a schematic view of the working principle of the lower chamber drain well.

The labels in the figure are: 1. post-pouring a belt; 2. draining pump; 3. an external wall panel; 4. a sump wall plate; 5. a water collecting well; 6. a base plate; 7. the upper layer of stagnant water level; 8. an outlet port; 9. a top plate; 10. a drain pipe; 11. planting soil to cover the area; 12. starting a pump water level; 13. a basement; 14. a steel plate waterstop; 15. leading the inner steel bar of the water stop belt; 16. stopping the pump water level; 17. a rubber waterstop; 18. internally cutting an opening; 19. leading the inner steel bar of the water stop belt; 20. leading a water stop; 21. a cushion layer; 22. the direction of groundwater flow.

Detailed Description

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

The anti-floating drainage well for the basement can be used for drainage and anti-floating in the construction stage of underground engineering and can also be used as an anti-floating emergency measure for the built underground engineering.

As shown in fig. 1-2, the anti-floating drainage well of the basement of the present embodiment includes a bottom plate 6 and a soil planting zone 11 disposed in the basement 13, wherein an outer wall plate 3 is disposed on a side surface of the bottom plate 6, a top plate 9 is disposed on an upper end of the outer wall plate 3, and the soil planting zone 11 has an upper layer stagnant water level 7. A post-cast strip 1 is arranged on the bottom plate 6 every 30-40 m, and a drainage well is arranged in the middle span of the post-cast strip 1. The drain well comprises a drain pump 2 and a water collection well 5 enclosed by a water collection well wall plate 4, the drain pump 2 is mounted in the water collection well 5, and the drain pump 2 is connected to a discharge port 8 through a drain pipe 10. The sump wall plate 4 extends downwardly into the floor 6 and a steel plate water stop 14 is provided in the floor 6 across the floor 6 and the post-cast strip 1. According to the equivalent water head of the self weight of the basement bottom plate and the top plate concrete, the height of the drainage well can be determined, and the pump-starting water level in the drainage well is ensured to be not less than the equivalent water head. According to the anti-floating drainage well for the basement, the rubber water stop belt is arranged on the advanced water stop belt of the post-cast belt, so that underground water can be discharged into the well after being cut, and the steel plate water stop belt in the post-cast belt has a good waterproof effect on later-stage concrete plugging. Because the anti-floating of middle span is difficult to satisfy, the below water storage capacity of bottom plate is the most, and it is most effective to set up the drainage well at the middle span section of post-cast strip.

The lower surface of the post-cast strip 1 is provided with a leading water stop 20, and the thickness h of the leading water stop is preferably 350 mm. A rubber water stop 17 is arranged in the leading water stop 20, the rubber water stop 17 is provided with a water passing channel communicated with the water collecting well 5, the tail end of the water passing channel is a closed end, and an internally-cut opening 18 is formed after the closed end is cut. The groundwater flow direction 22 is shown by the arrow in figure 2.

A cushion layer 21 is arranged under the bottom plate 6, an advance water stop strip inner steel bar 19 attached to the lower surface of the bottom plate 6 is arranged on the upper side of the advance water stop strip 20, and an advance water stop strip inner steel bar 15 attached to the upper surface of the cushion layer 21 is arranged on the lower side of the advance water stop strip.

The pouring method of the anti-floating drainage well of the basement comprises the following steps:

1. binding a basement bottom plate and reinforcing steel bars in a drainage well, and arranging a water stop (the drainage well is arranged on a middle span of a post-pouring belt);

2. pouring the bottom plate together with the drainage well;

3. installing a drainage pump, wherein a water outlet pipe extends into a pond near a site or a position far away from a foundation pit through a top plate of the basement;

4. setting a pump starting water level and a pump stopping water level according to the equivalent water head;

5. after the top plate of the basement is finished and the well point is stopped to descend water, the rubber waterstop within the range of the well can be cut off, and the drainage pump automatically judges to be started and closed according to the water level in the well;

6. and after the basement top plate is completely covered with soil, removing the drainage pump, cutting off the drainage well, cleaning sundries in the post-pouring belt, and pouring the post-pouring belt by using the high-strength expanded concrete.

When the bottom plate is poured, the bottom plate and the drainage well are poured together, the drainage pump is installed inside, the drainage pipe 10 extends into a pond near the field or a position far away from a foundation pit through the top plate 9 of the basement, and the starting pump water level 12 and the stopping pump water level 16 are set. After the top plate of the basement is finished and the well point is stopped for dewatering, the rubber water stop belt in the well range can be cut, and the drainage pump is automatically judged to be opened and closed according to the water level in the well. And after the basement top plate is completely covered with soil, removing the drainage pump, cutting off the drainage well, cleaning sundries in the post-pouring belt, and pouring the post-pouring belt by using the high-strength expanded concrete.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the present invention. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. An anti-floating drainage well of a basement is characterized in that a bottom plate (6) with the thickness of h is arranged in the basement, a post-pouring belt (1) is arranged on the bottom plate (6) every 30-40 m, a drainage well is arranged at the middle span section of the post-cast strip (1), the drainage well comprises a drainage pump (2) and a water collecting well (5) which is formed by enclosing a water collecting well wall plate (4), the drainage pump (2) is arranged in the water collecting well (5), the drainage pump (2) is connected to the discharge port (8) through a drainage pipe (10), an advanced water stop (20) is arranged below the post-pouring belt (1), a rubber water stop (17) is arranged in the leading water stop (20), the rubber water stop (17) is provided with a water passing channel communicated with the water collecting well (5), the tail end of the water passing channel is a closed end, and the closed end is cut to form an inner cutting opening (18).

2. The anti-floating drainage well for the basement as claimed in claim 1, wherein the water collecting well (5) is provided with a pump-on water level (12) and a pump-off water level (16), the side surface of the bottom plate (6) is provided with an external wall plate (3), and the upper end of the external wall plate (3) is provided with a top plate (9).

3. The anti-floating drainage well for the basement as claimed in claim 1, wherein the water collecting well wall plate (4) extends downwards into the bottom plate (6), and a steel plate water stop (14) which penetrates through the bottom plate (6) and the post-pouring strip (1) is arranged in the bottom plate (6).

4. The anti-floating drainage well for the basement according to claim 1, wherein a cushion layer (21) is arranged under the bottom plate (6), an advanced water stop inner steel bar (19) attached to the lower surface of the bottom plate (6) is arranged on the upper side of the advanced water stop (20), and an advanced water stop inner steel bar (15) attached to the upper surface of the cushion layer (21) is arranged on the lower side of the advanced water stop inner steel bar.

5. The basement anti-floating drainage well according to claim 2, wherein the drainage pipe (10) extends through the basement top plate (9) to the near-field pond or far from the foundation pit.