CN216892484U

CN216892484U - Recoverable double-casing light well point dewatering device

Info

Publication number: CN216892484U
Application number: CN202220670293.4U
Authority: CN
Inventors: 刘义才; 饶振豪
Original assignee: Third Engineering Co Ltd Of Cccc Third Highway Engineering Co ltd
Current assignee: Third Engineering Co Ltd Of Cccc Third Highway Engineering Co ltd
Priority date: 2022-03-22
Filing date: 2022-03-22
Publication date: 2022-07-05
Anticipated expiration: 2032-03-22

Abstract

The utility model relates to a recyclable double-sleeve light well point dewatering device, which comprises an inner pipe, an outer pipe and a filter layer, wherein the inner pipe is sleeved in the outer pipe, the bottom of the inner pipe is provided with a filter screen, a containing cavity is formed between the inner pipe and the outer pipe as well as between the inner pipe and the filter screen, a light aggregate layer for filtering is arranged in the containing cavity, the outer pipe is provided with a filter hole, permeable geotextile is arranged in the filter hole, the top of the inner pipe is embedded into a sealing cap, and the outer pipe penetrates through the sealing cap and extends outwards; the bottom of the inner pipe is sealed by a filter screen; the light aggregate layer comprises a ceramsite layer and a ceramic sand layer. According to the utility model, the double-layer filtering system is used for completely filtering particles in water, so that fine particles in water entering the well point pipe and needing to be discharged are effectively reduced, the well point pipe, the main drainage pipe and the water storage tank are prevented from being silted up, the vacuum pump can be ensured to continuously and normally operate, the device can continuously perform precipitation work, the precipitation efficiency is improved, and the safety of vacuum pump components is ensured.

Description

Recoverable double-casing light well point dewatering device

Technical Field

The utility model relates to the technical field of well point dewatering treatment, in particular to a recyclable double-casing light well point dewatering device.

Background

Well point dewatering is a method for artificially reducing underground water level. So it is also called well point dewatering method. Before the excavation of the foundation pit, a certain number of water filtering pipes (wells) are buried around the foundation pit, and water is pumped by using a water pumping device to keep the excavated soil in a dry state all the time.

The light well point dewatering has the advantages of simple equipment, easy operation and convenient management; the slope rate of the side slope of the foundation pit excavation can be reduced, and the earth volume of the foundation pit excavation is reduced; the construction environment of the excavated foundation pit is good, the construction of each process is convenient, and the construction process of the foundation pit is greatly improved; fourthly, no water exists in the excavated foundation pit, and the bearing capacity of the substrate is correspondingly improved; the construction method is applied to soft soil roadbed and places with abundant underground water, and has obvious construction effect; and the like, so the water-saving agent is widely applied to foundation pit dewatering and drainage, but the investigation on the light well-point dewatering equipment widely used at present finds that the following problems exist:

1. the retaining wall mud (condense into the mud skin and cohere on geotechnological cloth filter screen, form one deck diaphragm) that traditional light-duty well point dewatering equipment got into around the wall of a well wall at pore-forming in-process well wall is difficult for rinsing totally, blocks up the passageway between dewatering district and dewatering well, reduces near the wall of a well stratum water permeability to the actual displacement can't reach prediction displacement far away, seriously influences dewatering effect.

2. The well-building materials can not be reused, the waste is large, the equipment is difficult to clean, the problems occur, and the well-building materials can not be repaired in time.

SUMMERY OF THE UTILITY MODEL

The utility model provides a recyclable double-casing light well point dewatering device, which aims to solve the technical problems.

According to one aspect of the utility model, the recoverable double-sleeve light well-point dewatering device comprises an inner pipe, an outer pipe and a filtering layer, wherein the inner pipe is sleeved in the outer pipe, a filtering net is arranged at the bottom of the inner pipe, a containing cavity is formed between the inner pipe and the outer pipe as well as between the inner pipe and the filtering net, a light aggregate layer for filtering is arranged in the containing cavity, filtering holes are formed in the outer net, permeable geotextile is arranged in the filtering holes, the top of the inner pipe is embedded into a sealing cap, and the outer pipe penetrates through the sealing cap and extends outwards; the bottom of the inner pipe is sealed by a filter screen.

On the basis of the scheme, the filtering holes are preferably round holes.

On the basis of the scheme, the light aggregate layer preferably comprises a ceramsite layer and a ceramsite layer, and the ceramsite layer are respectively formed into a ring by a filter screen in a locking manner and are coaxially arranged with the inner pipe.

According to the recyclable double-sleeve light well point dewatering device, particles in water are completely filtered through the double-layer filtering system, fine particles in water which enters the well point pipe and needs to be discharged are effectively reduced, the well point pipe, the main drainage pipe and the water storage tank are guaranteed not to be silted up, the vacuum pump can be guaranteed to run continuously and normally, the device can continuously dewater, dewatering efficiency is improved, and safety of vacuum pump parts is guaranteed.

And the ceramsite layer and the ceramic sand layer are lighter in weight and can be washed, so that the filtering material is recycled, the utilization rate is improved, and the cost is reduced.

Finally, due to the unique design of the device, the characteristic that the device is used along with the placement is realized, the device is more convenient and quicker to remove, the unique upper structure is inserted into the soil body to realize the integral sealing effect, and the process is saved without additional treatment.

Drawings

FIG. 1 is a block diagram of a retrievable double casing light well point precipitation installation of the present invention.

Detailed Description

The following detailed description of embodiments of the present invention is provided in connection with the accompanying drawings and examples. The following examples are intended to illustrate the utility model but are not intended to limit the scope of the utility model.

Referring to fig. 1, the utility model provides a recoverable double-casing light well-point dewatering device, which comprises an inner pipe 10, an outer pipe 20 and a light aggregate layer 30, wherein the inner pipe 10 is sleeved in the outer pipe 20, a filter screen is arranged at the bottom of the inner pipe 10, a containing cavity is formed between the inner pipe 10 and the outer pipe 20 and between the inner pipe 10 and the filter screen, the light aggregate layer 30 for filtering is arranged in the containing cavity, a filtering hole 23 is formed in the outer net, a permeable geotextile 22 is arranged in the filtering hole 23, the top of the inner pipe 10 is embedded into a sealing cap 40, and the outer pipe 20 penetrates through the sealing cap 40 and extends outwards; the bottom of the inner tube 10 is sealed by a filter screen 24, wherein the filter holes 23 are round holes.

The lightweight aggregate layer 30 of the present invention includes a ceramsite layer and a ceramsite layer, which are respectively locked by a filter screen to form a ring shape and coaxially disposed with the inner tube 10.

During the use, inner tube 10 directly accepts with the well point pipe, combines the soil layer structure through the effect of sealed cap 40, has formed a confined space between inner tube 10 and outer tube 20, because the pressure in inner tube 10 will be less than the outside pressure of outer tube 20, therefore, under hydraulic effect, water passes through geotechnological cloth 22 after the first filtration, after permeating filtration hole 23 gets into light aggregate layer 30, under the filtering action of light aggregate layer 30, because glance sideways has filtration hole 23 on the inner tube 10, consequently, water upwards permeates into inner tube 10 by the filter screen of bottom to accomplish its filtration water.

And the light aggregate layer 30 used in the utility model is positioned in the interlayer in the middle, the front layer and the rear layer are both blocked by using geotechnical materials, so that the filtration and the recycling of the light aggregate layer 30 are ensured, and the ceramsite layer and the ceramic sand layer have lighter weight and can be washed, so that the recycling of the filtering material is realized, the utilization rate is improved, and the cost is reduced.

Finally, due to the unique design of the device, the characteristic of being placed and used is realized, the device is more convenient and faster to remove, the unique upper structure is inserted into the soil body to realize the integral sealing effect, and the process is saved without additional treatment

Finally, the method of the present application is only a preferred embodiment and is not intended to limit the scope of the present invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. The recoverable double-sleeve light well-point dewatering device is characterized by comprising an inner pipe, an outer pipe and a filter layer, wherein the inner pipe is sleeved in the outer pipe, the bottom of the inner pipe is provided with the filter screen, a containing cavity is formed between the inner pipe and the outer pipe and between the inner pipe and the filter screen, a light aggregate layer for filtering is arranged in the containing cavity, the outer pipe is provided with a filtering hole, permeable geotextile is arranged in the filtering hole, the top of the inner pipe is embedded into a sealing cap, and the outer pipe penetrates through the sealing cap and extends outwards; the bottom of the inner pipe is sealed by a filter screen; the light aggregate layer comprises a ceramsite layer and a ceramsite layer.

2. The retrievable double casing light well point precipitation device of claim 1, wherein the filtration apertures are circular apertures.

3. The retrievable double casing light duty well point precipitation device of claim 2, wherein said ceramsite layer and said ceramsite layer are each provided coaxially with said inner pipe in a form of a mesh in a locked loop.

4. The retrievable double casing light well point precipitation device of claim 2, wherein the filter screen is filled with the lightweight aggregate layer.