CN203421330U

CN203421330U - Detachable-washing double-wall sand filtering drain pipe

Info

Publication number: CN203421330U
Application number: CN201320503105.XU
Authority: CN
Inventors: 王飞; 娄霜; 沈洪波; 伍毅敏
Original assignee: ANHUI COMMUNICATIONS VOCATIONAL & TECHNICAL COLLEGE; Anhui Transport Consulting and Design Institute Co Ltd
Priority date: 2013-08-19
Filing date: 2013-08-19
Publication date: 2014-02-05
Anticipated expiration: 2023-08-19

Abstract

The utility model discloses a detachable-washing double-wall sand filtering drain pipe which comprises an outer layer pipe, an inner layer pipe and a water filtering layer. The outer layer pipe is arranged on the inner layer pipe in a sleeved mode. The water filtering layer is placed between the outer layer pipe and the inner layer pipe. A gap through which the water filtering layer can carry out twitching is reserved between the outer layer pipe and the inner layer pipe. An outer layer pipe water draining hole and an inner layer pipe water draining hole are formed in the pipe wall of the outer layer pipe and the pipe wall of the inner layer pipe respectively. The detachable-washing double-wall sand filtering drain pipe is used in a tunnel and underground construction, the water filtering layer is arranged to prevent mud sand from exudation, surrounding rock collapsing caused by mud sand exudation is avoided, mud sand is prevented from blocking a tunnel water drain system, after the water filtering layer and the inner layer pipe are used for a plurality of years, the water filtering layer and the inner layer pipe can be disassembled and washed or be replaced, and the problem that water drain capacity is lowered after using time is increased is solved.

Description

A kind of washable double-walled filter sand waste pipe

Technical field

The utility model belongs to tunnel and underground engineering technical field, is specifically related to be applied to the waste pipe of tunnel and underground engineering.

Background technique

In tunnel and underground engineering, the country rock in structure outside is often composed and is deposited more rich underground water, and these underground water can form water pressure on the one hand, increase structural load; On the other hand, the underground water structure of may passing through tunnel causes percolating water, affects safety.In order to prevent the problem of above-mentioned two aspects, at present mostly, by the discharge of will seep water of the way to wall rock drill-hole, punch steel pipe or the pvc pipe also buried underground in hole with good conditionsi, to keep weep hole not because Rock And Soil is out of shape the obstruction of caving in.

The method that adopts boring and bury punching steel pipe or pvc pipe underground, though infiltration can be discharged, still, owing to may there are a large amount of silt particles in country rock infiltration, these silt particles also can flow out with infiltration.The outflow of silt particle can bring the problem of two aspects: the one, and silt particle enters tunnel drainage system, can deposit in discharge pipe line, causes impeded drainage and loses efficacy; The 2nd, the loss of silt particle can cause tunnel perimeter country rock to occur cavity, and cavity is developed into a certain degree and can be caved in afterwards, affects tunnel structure safety.At present in petroleum industry, there is dissimilar screen casing, also can play and stop sand to enter to recover the oil or the effect of wellbore tubing, but and be not suitable for tunnelling works.The subject matter of its existence is: 1) filtering layer of screen casing structure, mainly for the gravel of greater particle size, can not stop entering of the small particle diameter solids such as earth; 2) filtering layer of all kinds screen casing can not change and clean, and can not meet the tunnelling works user demand of dozens or even hundreds of year; 3) all types of screen casings adopt metallic material to make, and cost is high, and corrosion resistance is undesirable.

Model utility content

The purpose of this utility model is for avoiding the existing deficiency of above-mentioned prior art that a kind of washable double-walled filter sand waste pipe is provided, both underground water was discharged, can effectively stop silt particle to enter drainage system again and prevent that silt particle runs off, can also regularly unpick and wash replacing, meet the needs of tunnelling works country rock long-term safety.

The utility model is that technical solution problem adopts following technological scheme:

A double-walled filter sand waste pipe, comprises external pipe, inner tube and drainage layer.External pipe is set in inner tube, and described drainage layer, between external pipe and inner tube, and leaves the gap that drainage layer can be twitched between external pipe and inner tube; On the tube wall of described external pipe and inner tube, be respectively equipped with external pipe spilled water hole and inner tube spilled water hole.

Described drainage layer is braided fabric more than one deck.

The material of described external pipe and inner tube is macromolecular material; Macromolecular material is PVC＝polyvinyl chloride (PVC) or ethylene-vinyl acetate copolymer (EVA).

The material of described drainage layer is nylon wire braided fabric or nylon rope braided fabric.

The beneficial effects of the utility model are:

By drainage layer is set, blocked oozing out of silt particle, prevented from causing country rock to cave in because silt particle runs off, also prevented that silt particle silts tunnel drainage system up; Drainage layer and inner tube can split out cleaning or change after using the several years, have solved and have increased the problem that rear drainage capacity reduces service life.

Accompanying drawing explanation

Fig. 1 is unitary construction schematic diagram of the present utility model.

Fig. 2 is schematic cross-sectional view of the present utility model.

Fig. 3 is that washable double-walled filter sand waste pipe is at the layout schematic diagram of tunnel cross section.

Fig. 4 is the working principle schematic diagram of washable double-walled filter sand waste pipe in tunnelling works.

Upper number in the figure: 1 external pipe, 2 inner tube, 3 drainage layers, 4 external pipe spilled water holes, 5 inner tube spilled water holes, 6 tunnel drainage pipelines, 7 blocking devices, 8 tunnel structures, 9 country rocks.

Embodiment

Below in conjunction with drawings and Examples, the utility model is further illustrated.

Shown in Figure 1, Fig. 1 is unitary construction schematic diagram of the present utility model.

A kind of washable double-walled filter sand waste pipe comprises external pipe 1, inner tube 2 and drainage layer 3.External pipe 1 is set in inner tube 2, and drainage layer 3 is between external pipe 1 and inner tube 2, and drainage layer 3 is three layers of nylon wire braided fabric, and can in the gap between external pipe 1 and inner tube 2, twitch.Drainage layer 3 is to reach the object that regulates drainage capacity and filter sand effect.On the tube wall of external pipe 1, be provided with external pipe spilled water hole 4, on the tube wall of inner tube 2, be provided with inner tube spilled water hole 5; The material PVC＝polyvinyl chloride (PVC) of external pipe 1 and inner tube 2, has the feature of long service life.

From Fig. 3 and Fig. 4, for the tunnel that need to strengthen draining, the washable double-walled filter sand waste pipe of different length is radially set at the diverse location of tunnel structure 8.Underground water in country rock 9 carries silt to external pipe spilled water hole 4 seepage flow of external pipe 1, runs into stopping of drainage layer 3 after entering external pipe 1, and silt particle is trapped, and water after filtering continues to enter inner tube 2 the insides by inner tube spilled water hole 5.Inner tube 2 outer ends are communicated with tunnel drainage pipeline 6, and the underground water in country rock 9 enters tunnel drainage system.

When the requirement of tunnel groundwater discharge amount is larger, the less drainage layer 3 of the number of plies can be set, strengthen its drainage capacity; Otherwise the more number of plies is set, to reduce its water permeable ability.By changing self pore size and number of plies of drainage layer 3, also can regulate its filtering effect, meet different filter sand drainage requirements; Spilled water hole can be adjusted its quantity according to water displacement size equally.When tunnel was used after the several years, due to the more silt particle that deposited in drainage layer 3, the drainage capacity of waste pipe can decline, now, can remove blocking device 7, remove contacting of washable double-walled filter sand waste pipe and tunnel drainage pipeline 6, inner tube 2 and drainage layer 3 are extracted out, after cleaning or replacing drainage layer 3, again insert, can recover its original drain function.

Claims

1. a washable double-walled filter sand waste pipe, is characterized in that: comprise external pipe (1), inner tube (2) and drainage layer (3); It is upper that external pipe (1) is set in inner tube (2), and described drainage layer (3) is positioned between external pipe (1) and inner tube (2), and leaves the gap that drainage layer (3) can be twitched between external pipe (1) and inner tube (2); On the tube wall of described external pipe (1) and inner tube (2), be respectively equipped with external pipe spilled water hole (4) and inner tube spilled water hole (5).

2. a kind of washable double-walled filter sand waste pipe according to claim 1, is characterized in that: described drainage layer (3) is braided fabric more than one deck.

3. a kind of washable double-walled filter sand waste pipe according to claim 1, is characterized in that: the material of described external pipe (1) and inner tube (2) is PVC＝polyvinyl chloride (PVC) or ethylene-vinyl acetate copolymer (EVA).

4. a kind of washable double-walled filter sand waste pipe according to claim 1, is characterized in that: the material of described drainage layer (3) is nylon wire braided fabric or nylon rope braided fabric.