CN220266610U

CN220266610U - Local precipitation structure in foundation ditch

Info

Publication number: CN220266610U
Application number: CN202322333115.XU
Authority: CN
Inventors: 许厚材; 付兴中; 王丙辉; 谢永飞
Original assignee: Beijing Urban Construction Group Co Ltd
Current assignee: Beijing Urban Construction Group Co Ltd
Priority date: 2023-08-29
Filing date: 2023-08-29
Publication date: 2023-12-29
Anticipated expiration: 2033-08-29

Abstract

The local dewatering structure in the foundation pit comprises a foundation pit body, wherein a pit in which a steel plate caisson with an opening on the top surface is fixedly arranged is arranged in the middle of the bottom surface of the foundation pit body, the top of the steel plate caisson is higher than the water level, and a water inlet valve is fixedly arranged on the side wall of the lower end of the steel plate caisson; through the mode of digging the pit in the pit again in the foundation pit body to set up the steel sheet caisson in the pit, when carrying out the precipitation to the groundwater level below the bed course elevation, only need carry out the processing of bed course and waterproof layer after carrying out the drainage to the water in the steel sheet caisson, easy operation, and compared with the multi-well joint water pumping and precipitation method and underground shutoff precipitation method reduced a large amount of costs.

Description

Local precipitation structure in foundation ditch

Technical Field

The application relates to the technical field of foundation pit dewatering, in particular to a local dewatering structure in a foundation pit.

Background

The foundation pit dewatering is a common construction measure when underground construction or foundation engineering is carried out, and the main purpose is to reduce the groundwater level in the foundation pit, so as to facilitate construction and ensure the safe performance of engineering.

In the prior art, when the groundwater level is near below the elevation of the cushion layer, but large amount of groundwater possibly floats upwards to damage the waterproof layer, the bottom of the foundation pit is also subjected to precipitation under the condition, and the foundation pit is usually subjected to local precipitation by adopting a multi-well combined water pumping and precipitation method, an underground plugging combined water pumping and precipitation method and the like, but the precipitation modes are complicated in precipitation operation, and the construction cost is high.

Therefore, the inventor needs to design a new local dewatering structure in the foundation pit to overcome the above problems.

Disclosure of Invention

The main aim of the application is to provide a local precipitation structure in foundation ditch to solve the problem that precipitation mode operation complicacy construction cost is high among the correlation technique.

In order to achieve the above-mentioned purpose, the application provides a local precipitation structure in foundation ditch, including the foundation ditch body, the bottom surface middle part of foundation ditch body has the hole in the hole, the fixed steel sheet caisson that is provided with the top surface open-ended in the hole, the top of steel sheet caisson is higher than the water level, fixed the be provided with the water intaking valve on the lateral wall of steel sheet caisson lower extreme.

Preferably, the steel plate caisson comprises a caisson body and a fastening structure fixedly arranged on the outer wall of the agilawood body.

Preferably, the fastening structure comprises a plurality of reinforcing ribs fixedly connected to the outer wall of the caisson body and a plurality of U-shaped hoops fixedly connected to the outer wall of the caisson body.

Preferably, the reinforcing ribs and the U-shaped hoops are fixedly connected to the outer wall of the caisson body through welding.

Preferably, the top of the caisson body is 150mm above the water level.

Preferably, the water inlet valve comprises a steel sleeve fixedly arranged on the caisson body and a stop valve body fixedly arranged in the steel sleeve.

Preferably, the steel sleeve is fixedly arranged at a position 300mm above the bottom plate of the caisson body.

Preferably, the inner wall of the steel sleeve is brushed with antirust paint.

Preferably, the top of the caisson body is higher than the bottom surface of the foundation pit body.

Preferably, the caisson body is rectangular.

Compared with the prior art, the local dewatering structure in the foundation pit has the beneficial effects that:

through the mode of digging the pit in the pit again in the foundation pit body to set up the steel sheet caisson in the pit, when carrying out local precipitation to the groundwater level below the bed course elevation, only need carry out the processing of bed course and waterproof layer after carrying out the drainage to the water in the steel sheet caisson, easy operation, and compared with the multi-well joint water pumping and precipitation method and underground shutoff precipitation method reduced a large amount of costs.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this application, are included to provide a further understanding of the application and to provide a further understanding of the application with regard to the other features, objects and advantages of the application. The drawings of the illustrative embodiments of the present application and their descriptions are for the purpose of illustrating the present application and are not to be construed as unduly limiting the present application. In the drawings:

FIG. 1 is a schematic view of the overall structure of the present utility model;

FIG. 2 is an overall construction view of the steel plate caisson of the present utility model;

figure 3 is a block diagram of the interior of the caisson body of the present utility model.

Wherein: 1. a foundation pit body; 2. pit in pit; 3. a water inlet valve; 4. a caisson body; 5. reinforcing ribs; 6. a U-shaped hoop; 7. a steel sleeve.

Detailed Description

In order to make the present application solution better understood by those skilled in the art, the following description will be made in detail and with reference to the accompanying drawings in the embodiments of the present application, it is apparent that the described embodiments are only some embodiments of the present application, not all embodiments. All other embodiments, which can be made by one of ordinary skill in the art based on the embodiments herein without making any inventive effort, shall fall within the scope of the present application.

It should be noted that the terms "first," "second," and the like in the description and claims of the present application and the above figures are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used may be interchanged where appropriate in order to describe the embodiments of the present application described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.

In the present application, the terms "upper", "lower", "left", "right", "front", "rear", "top", "bottom", "inner", "outer", "middle", "vertical", "horizontal", "lateral", "longitudinal" and the like indicate an azimuth or a positional relationship based on that shown in the drawings. These terms are used primarily to better describe the present application and its embodiments and are not intended to limit the indicated device, element or component to a particular orientation or to be constructed and operated in a particular orientation.

Also, some of the terms described above may be used to indicate other meanings in addition to orientation or positional relationships, for example, the term "upper" may also be used to indicate some sort of attachment or connection in some cases. The specific meaning of these terms in this application will be understood by those of ordinary skill in the art as appropriate.

In addition, the term "plurality" shall mean two as well as more than two.

It should be noted that, in the case of no conflict, the embodiments and features in the embodiments may be combined with each other. The present application will be described in detail below with reference to the accompanying drawings in conjunction with embodiments.

As shown in fig. 1 to 3, the local dewatering structure in the foundation pit comprises a foundation pit body 1, wherein a pit-in-pit 2 is arranged in the middle of the bottom surface of the foundation pit body 1, a steel plate caisson with an opening on the top surface is fixedly arranged in the pit-in-pit 2, the top of the steel plate caisson is higher than the water level, and a water inlet valve 3 is fixedly arranged on the side wall of the lower end of the steel plate caisson; the steel plate caisson comprises a caisson body 4 and a fastening structure fixedly arranged on the outer wall of the agilawood body; the caisson body 4 is rectangular; the top of the caisson body 4 is higher than the bottom surface of the foundation pit body 1; when the foundation pit is used for dewatering when the groundwater level is lower than the elevation of a cushion layer, firstly, excavating the foundation pit body 1 to the elevation of the cushion layer, then continuing to excavate the middle part of the foundation pit body 1, excavating a rectangular pit-in-pit 2, opening a water inlet valve 3 after groundwater is stored in the pit-in-pit 2, placing a rectangular steel plate caisson in the pit-in-pit 2, pouring concrete around the caisson body 4 after the caisson body 4 is submerged until the concrete is poured to the elevation of the cushion layer, continuously pouring around the outer periphery of the steel plate caisson by adopting an automobile pump, after pouring is completed, carrying out drainage on accumulated water in the caisson after slope finding is completed, carrying out cushion layer and waterproof layer construction after drainage is completed, and processing and manufacturing the rectangular steel plate caisson is convenient.

The fastening structure comprises a plurality of reinforcing ribs 5 fixedly connected to the outer wall of the caisson body 4 and a plurality of U-shaped hoops 6 fixedly connected to the outer wall of the caisson body 4; the reinforcing ribs 5 and the U-shaped hoops 6 are fixedly connected to the outer wall of the caisson body 4 through welding; in operation, the reinforcing ribs 5 can strengthen the rigidity of the caisson body 4, so that the caisson body can bear larger water pressure, and the U-shaped hoops 6 are embedded in concrete after concrete is poured, so that the stability of the caisson body 4 is enhanced.

The top of the caisson body 4 is 150mm higher than the water level elevation; the water inlet valve 3 comprises a steel sleeve 7 fixedly arranged on the caisson body 4 and a stop valve body fixedly arranged in the steel sleeve 7; the steel sleeve 7 is fixedly arranged at a position 300mm above the bottom plate of the caisson body 4; the inner wall of the steel sleeve 7 is brushed with antirust paint; the design that the top of the caisson is 150mm higher than the water level can ensure that water can smoothly enter the steel sleeve 7 in the sinking process of the caisson so as to realize water drainage. Meanwhile, a certain safety margin can be reserved when the height of the water outlet level is 150mm, so that the water level is prevented from rising due to the fluctuation of the underground water level or other unexpected conditions, and the height of the top of the caisson is exceeded, thereby influencing the stability of the caisson; the water outlet is arranged at the position 300mm above the bottom plate, so that the water outlet is still at a relatively high position under different groundwater level conditions, is not easy to submerge, can continuously drain water, effectively controls the groundwater level, reduces the influence of groundwater buoyancy on the caisson, and ensures the stability of the caisson.

The foregoing description is only of the preferred embodiments of the present application and is not intended to limit the same, but rather, various modifications and variations may be made by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present application should be included in the protection scope of the present application.

Claims

1. The utility model provides a local precipitation structure in foundation ditch, includes foundation ditch body (1), its characterized in that: the foundation pit is characterized in that a pit in pit (2) is formed in the middle of the bottom surface of the foundation pit body (1), a steel plate caisson with an opening on the top surface is fixedly arranged in the pit in pit (2), the top of the steel plate caisson is higher than the water level, and a water inlet valve (3) is fixedly arranged on the side wall of the lower end of the steel plate caisson.

2. A localized precipitation structure in a pit as claimed in claim 1, wherein: the steel plate caisson comprises a caisson body (4) and a fastening structure fixedly arranged on the outer wall of the caisson body (4).

3. A localized precipitation structure in a pit according to claim 2, wherein: the fastening structure comprises a plurality of reinforcing ribs (5) fixedly connected to the outer wall of the caisson body (4) and a plurality of U-shaped hoops (6) fixedly connected to the outer wall of the caisson body (4).

4. A localized precipitation structure in a pit as claimed in claim 3, wherein: the reinforcing ribs (5) and the U-shaped hoops (6) are fixedly connected to the outer wall of the caisson body (4) through welding.

5. A localized precipitation structure in a pit according to claim 2, wherein: the top of the caisson body (4) is 150mm higher than the water level elevation.

6. A localized precipitation structure in a pit according to claim 2, wherein: the water inlet valve (3) comprises a steel sleeve (7) fixedly arranged on the caisson body (4) and a stop valve body fixedly arranged in the steel sleeve (7).

7. The foundation pit interior local precipitation structure of claim 6, wherein: the steel sleeve (7) is fixedly arranged at the position 300mm above the bottom plate of the caisson body (4).

8. The foundation pit interior local precipitation structure of claim 6, wherein: the inner wall of the steel sleeve (7) is coated with antirust paint.

9. A localized precipitation structure in a pit according to claim 2, wherein: the top of the caisson body (4) is higher than the bottom surface of the foundation pit body (1).

10. A localized precipitation structure in a pit according to claim 2, wherein: the caisson body (4) is rectangular.