CN218933172U

CN218933172U - Drainage water-stopping structure in pit under basement bottom plate

Info

Publication number: CN218933172U
Application number: CN202223191041.2U
Authority: CN
Inventors: 罗七妹; 刘元俊
Original assignee: China United Engineering Corp Ltd
Current assignee: China United Engineering Corp Ltd
Priority date: 2022-11-30
Filing date: 2022-11-30
Publication date: 2023-04-28
Anticipated expiration: 2032-11-30

Abstract

The utility model provides a drainage water stop structure in a pit below a basement bottom plate, which not only can keep the original functions of the pit, but also can effectively drain accumulated water in time, can prevent later accumulated water, and furthest reduces the adverse effect of underground water. The utility model comprises a basement bottom plate, wherein the basement bottom plate is provided with a lower lying pit; the method is characterized in that: the device also comprises a graded broken stone layer, a water filtering pipe, a waterproof layer, a flange ring and a blind plate; the bottom of the lower lying pit is provided with a pit, and the bottom of the pit is paved with a graded broken stone layer; the water filtering pipe is fixedly arranged in the pit, the lower end of the water filtering pipe is inserted into the graded broken stone layer, and the upper end of the water filtering pipe extends into the basement bottom plate; a waterproof layer is arranged between the basement bottom plate and the water filtering pipe; the top end of the water filtering pipe is fixed with a flange ring, and the blind plate is fixed with the flange ring to seal the top end of the water filtering pipe.

Description

Drainage water-stopping structure in pit under basement bottom plate

Technical Field

The utility model relates to a drainage water-stopping structure in a lying pit below a basement bottom plate.

Background

For the underground pit such as an elevator shaft, an escalator pit, a lower pit and the like under a basement bottom plate, the functions of collecting underground water and preventing water accumulation and overflow in a foundation pit are generally carried out during construction, when the underground pit is subjected to a sand stratum with larger permeability and larger water quantity, the water in the lower pit is difficult to drain in time, and the conditions of reduced bearing capacity of the local foundation soil due to water flushing, difficult concrete pouring of the basement bottom plate and the like are easily caused. Therefore, how to effectively drain the underground water on the basis of keeping the original functions of the lower pit becomes a problem to be solved in construction.

Disclosure of Invention

The utility model aims to overcome the defects in the prior art, and provides the drainage water stop structure in the underground pit of the basement bottom plate, which is reasonable in structural design, can maintain the original functions of the underground pit, can timely and effectively drain accumulated water, can prevent later accumulated water, and furthest reduces the adverse effects of underground water.

The utility model solves the problems by adopting the following technical scheme: the drainage water-stopping structure in the lower lying pit of the basement bottom plate comprises the basement bottom plate, wherein the basement bottom plate is provided with the lower lying pit; the method is characterized in that: the device also comprises a graded broken stone layer, a water filtering pipe, a waterproof layer, a flange ring and a blind plate; the bottom of the lower lying pit is provided with a pit, and the bottom of the pit is paved with a graded broken stone layer; the water filtering pipe is fixedly arranged in the pit, the lower end of the water filtering pipe is inserted into the graded broken stone layer, and the upper end of the water filtering pipe extends into the basement bottom plate; a waterproof layer is arranged between the basement bottom plate and the water filtering pipe; the top end of the water filtering pipe is fixed with a flange ring, and the blind plate is fixed with the flange ring to seal the top end of the water filtering pipe.

The utility model pours the expansion concrete between the periphery of the water filtering pipe and the pit.

The end part of the waterproof layer is provided with an expansion water stop strip.

The lower part of the waterproof layer is bent to the periphery and then laid on the foundation mat layer below the basement bottom plate, and a plug is arranged in the bending area.

The water-stopping ring is welded on the water filtering pipe.

A rubber cushion is arranged between the blind plate and the flange ring.

The basement bottom plate is internally provided with reinforcing steel bars, and the reinforcing steel bars surround the part of the water filtering pipe extending into the basement bottom plate.

The reinforcing steel bar comprises reinforcing longitudinal bars and reinforcing stirrups, wherein the reinforcing longitudinal bars are uniformly distributed above the water filtering pipe, and the reinforcing stirrups are uniformly distributed along the reinforcing longitudinal bars.

The filter pipe is filled with fine stone expansion concrete.

Compared with the prior art, the utility model has the following advantages and effects: the bottom of the lower lying pit is provided with a water filtering pipe, and water stopping treatment is carried out, so that the original functions of the lower lying pit can be kept, accumulated water can be effectively discharged timely, later accumulated water can be prevented, and adverse effects of underground water are reduced to the greatest extent.

Drawings

Fig. 1 is a schematic structural diagram of an embodiment of the present utility model.

Detailed Description

The present utility model will be described in further detail by way of examples with reference to the accompanying drawings, which are illustrative of the present utility model and not limited to the following examples.

The embodiment of the utility model comprises a lower lying pit 1, a graded gravel layer 2, a water filtering pipe 3, a water stop ring 4, expanded concrete 5, a waterproof layer 6, a plug 7, an expanded water stop strip 8, a flange ring 9, a rubber mat 10, a blind plate 11, a flange bolt 12 and a basement bottom plate 18.

The basement floor 18 is provided locally with a lower pit 1, which should include, but is not limited to: elevator shaft, staircase pit, sump pit. The pit bottom soil layer of the lower lying pit 1 is gravel soil or weathered rock with larger permeability coefficient, and when the permeability coefficient of the pit bottom soil layer is larger and the water permeability is serious, the construction of the structural bottom plate can be influenced.

The central area of the bottom of the lower lying pit 1 is downwards dug with a pit hole 17, and the plane size of the pit hole 17 is 0.8mx0.8m and the depth is 1.0m. And uniformly filling graded broken stone with the grain size of 5-25mm in the height range of 400mm at the bottom of the pit 17 to form a graded broken stone layer 2.

The water filtering pipe 3 is a round steel pipe with the diameter of 400mm and the wall thickness of 12mm, is fixedly arranged in the pit hole 17, the lower end of the water filtering pipe 3 is inserted into the graded broken stone layer 2 for 100mm, and the upper end of the water filtering pipe 3 extends into the basement bottom plate 18 for 400mm. The expanded concrete 5 is poured between the periphery of the water filtering pipe 3 and the pit hole 17, the strength grade of the material is higher than that of the bottom plate concrete by one sign, and the C40 fine stone expanded concrete is adopted, so that the water filtering pipe 3 is firmly fixed in the pit hole 17.

A waterproof layer 6 is arranged between the basement bottom plate 18 and the water filtering pipe 3, the waterproof layer 6 material is the same as the waterproof layer material under the bottom plate, the horizontal laying length of the waterproof layer 6 is 500mm, and the vertical laying length is 250mm. The upper end part of the waterproof layer 6 is provided with an expansion water stop strip 8; the lower part of the waterproof layer 6 is bent to the periphery and then laid on the foundation mat layer 13 below the basement bottom plate 18, and a one-inch plug 7 is arranged in the bending area.

A water stop ring 4 is welded on the water filtering pipe 3, and the water stop ring 4 is arranged in two ways, one way is positioned in the basement bottom plate 18, and the other way is positioned in the expansion concrete 5.

And a flange ring 9 with the diameter of 600mm and the thickness of 12mm is welded at the top end of the water filtering pipe 3, and a welded joint is sealed. The blind plate 11 is fixed with the flange ring 9 by adopting 6M 12 flange bolts 12, and the top end of the water filtering pipe 3 is sealed. The blind plate 11 is a round steel plate with a diameter of 600mm and a thickness of 12 mm. A rubber cushion 10 with the diameter of 600mm is arranged between the blind plate 11 and the flange ring 9.

Reinforcing steel bars are arranged in the basement bottom plate 18, and surround the part of the water filtering pipe 3 extending into the basement bottom plate 18 to strengthen the structure of the basement bottom plate 18. The reinforcing steel bar comprises a reinforcing longitudinal bar 15 and a reinforcing stirrup 14, wherein the reinforcing longitudinal bar 15 is 20@100mm in specification and 2.0m in length, is uniformly distributed above the water filtering pipe 3, and the reinforcing stirrup 14 is 10@100 (4) in specification and is uniformly distributed along the reinforcing longitudinal bar 15.

The application method of the utility model is as follows:

(1) For the situation that the basement bottom plate is provided with the lower lying pit 1 locally, when the permeability coefficient of the pit bottom soil layer is large and the water permeability is serious, a pit hole 17 is dug downwards in the central area of the bottom of the lower lying pit 1, and a graded broken stone layer 2 is paved at the bottom of the pit hole 17;

(2) Placing a water filtering pipe 3 in the middle of the pit hole 17, adding a welded flange ring 9 on the upper part of the water filtering pipe, and sealing a welded joint;

(3) Pouring expansion concrete 5 along the periphery of the water filtering pipe, arranging a waterproof layer 6, and arranging expansion water stop strips 8 at the end part of the waterproof layer 6;

(4) And (3) placing a submersible pump in the pit hole 17 to pump and drain water, quickly withdrawing the submersible pump after pumping out water, fully filling quick setting fine stone expanded concrete in the water filtering pipe 3, vibrating to be compact, and sealing the upper part of the water filtering pipe 3 by using a blind plate 11 to stop water. Finally, building waterproof and concrete structure bottom plate casting are carried out.

In addition, it should be noted that the specific embodiments described in the present specification may vary from part to part, from name to name, etc., and the above description in the present specification is merely illustrative of the structure of the present utility model. All equivalent or simple changes of the structure, characteristics and principle according to the inventive concept are included in the protection scope of the present patent. Those skilled in the art may make various modifications or additions to the described embodiments or substitutions in a similar manner without departing from the scope of the utility model as defined in the accompanying claims.

Claims

1. The drainage water-stopping structure in the lower lying pit of the basement bottom plate comprises the basement bottom plate, wherein the basement bottom plate is provided with the lower lying pit; the method is characterized in that: the device also comprises a graded broken stone layer, a water filtering pipe, a waterproof layer, a flange ring and a blind plate; the bottom of the lower lying pit is provided with a pit, and the bottom of the pit is paved with a graded broken stone layer; the water filtering pipe is fixedly arranged in the pit, the lower end of the water filtering pipe is inserted into the graded broken stone layer, and the upper end of the water filtering pipe extends into the basement bottom plate; a waterproof layer is arranged between the basement bottom plate and the water filtering pipe; the top end of the water filtering pipe is fixed with a flange ring, and the blind plate is fixed with the flange ring to seal the top end of the water filtering pipe.

2. The structure for draining and stopping water in a bedroom under floor pit according to claim 1, wherein: and (5) pouring expanded concrete between the periphery of the water filtering pipe and the pits.

3. The structure for draining and stopping water in a bedroom under floor pit according to claim 1, wherein: the end part of the waterproof layer is provided with an expansion water stop strip.

4. The structure for draining and stopping water in a bedroom under floor pit according to claim 1, wherein: the lower part of the waterproof layer is bent to the periphery and then paved on a foundation cushion layer below the basement bottom plate, and a plug is arranged in the bending area.

5. The structure for draining and stopping water in a bedroom under floor pit according to claim 1, wherein: and a water stop ring is welded on the water filtering pipe.

6. The structure for draining and stopping water in a bedroom under floor pit according to claim 1, wherein: and a rubber cushion is arranged between the blind plate and the flange ring.

7. The structure for draining and stopping water in a bedroom under floor pit according to claim 1, wherein: the basement bottom plate in be provided with the reinforcement reinforcing bar, the reinforcement reinforcing bar centers on the drainage pipe and stretches into the basement bottom plate part around.

8. The structure for draining and stopping water in a bedroom under floor pit of claim 7, wherein: the reinforcing steel bar comprises reinforcing longitudinal bars and reinforcing stirrups, wherein the reinforcing longitudinal bars are uniformly distributed above the water filtering pipe, and the reinforcing stirrups are uniformly distributed along the reinforcing longitudinal bars.

9. The structure for draining and stopping water in a bedroom under floor pit according to claim 1, wherein: the filter pipe is filled with fine stone expansion concrete.