CN212003255U

CN212003255U - Passive drainage system between tunnel lining layer

Info

Publication number: CN212003255U
Application number: CN202020285911.4U
Authority: CN
Inventors: 伍毅敏; 许�鹏
Original assignee: Central South University
Current assignee: Central South University
Priority date: 2020-03-10
Filing date: 2020-03-10
Publication date: 2020-11-24
Anticipated expiration: 2030-03-10

Abstract

The utility model provides a passive drainage system between tunnel lining layer, including set up between waterproof layer and secondary lining, along the tunnel hoop lay many vertical drainage pipe and set up the drainage joint in adjacent mould lining seam crossing, vertical drainage pipe is used for collecting the percolating water between waterproof layer and the secondary lining, vertical drainage pipe is laid along tunnel extending direction, and every vertical drainage pipe's tip all is connected with a drainage joint, the utility model discloses can drain the infiltration fast, avoid the secondary lining directly to bear water pressure and take place the seepage, the setting of maintaining the joint both is convenient for install fixedly, penetrates the pipeline dredge by can being used to the later stage and cleans drainage pipe and dredges, and high-strength steel wire ensures vertical straight on the one hand, and on the other hand can be used to the shop of waterproof layer to hang, reduces construction cost, consequently, the utility model discloses have material few, simple to operate, Easy quality control, reliable function and easy maintenance.

Description

Passive drainage system between tunnel lining layer

Technical Field

The utility model relates to a tunnel and underground works field specifically are a passive drainage system between tunnel lining layer.

Background

The most common diseases of tunnel engineering are water leakage. Although the tunnel adopts a plurality of measures such as prevention, drainage, interception, blocking and the like at present, the problems of water prevention and drainage are still very prominent, and the failure of a waterproof layer and a drainage system is a direct reason. The composite lining structure for mountain tunnels comprises a primary support and a secondary lining, wherein a special waterproof layer is arranged between the primary support and the secondary support, and an annular drainage blind pipe and an arch foot longitudinal drainage pipe are arranged between the waterproof layer and the primary support to drain away seepage blocked by the waterproof layer. If the waterproof layer or the drainage system can effectively play a role, the tunnel cannot leak. The direct cause of tunnel leakage is that the above waterproof layer and drainage system fail during construction and operation and cannot be repaired or remedied after failure. Because the waterproof layer is inevitably out of work due to construction defects, material aging and other operation period factors, how to construct a passive drainage system between tunnel lining layers and provide a maintainable method is very important for thoroughly solving the problem of frequent water leakage of the tunnel.

SUMMERY OF THE UTILITY MODEL

The utility model discloses to mountain ridge tunnel combined type lining cutting structural layer waterproof layer often appear inefficacy and be difficult to prosthetic problem, provide one kind and can get rid of the water that pierces through the waterproof layer passively, avoid the lining cutting surface to take place the seepage, set up the passive drainage system between the tunnel lining layer between waterproof layer and secondary lining cutting.

The utility model comprises the following embodiments:

a passive drainage system between tunnel lining layers comprises a plurality of longitudinal drainage pipelines and drainage joints, wherein the longitudinal drainage pipelines are arranged between a waterproof layer and a secondary lining and are distributed along the circumferential direction of a tunnel, the drainage joints are arranged at the ends of the lining, the longitudinal drainage pipelines are used for collecting water leakage between the waterproof layer and the secondary lining, the longitudinal drainage pipelines are distributed along the extending direction of the tunnel, the end part of each longitudinal drainage pipeline is connected with one drainage joint, the drainage joints on the adjacent longitudinal drainage pipelines are communicated through the circumferential drainage pipelines, the tail ends of the circumferential drainage pipelines are communicated with the tunnel drainage system through drainage pipes, maintenance joints which are communicated with the drainage joints and are distributed along the radial direction are arranged on the drainage joints, the maintenance joints penetrate through the secondary lining to the inner side surface of the tunnel, and the maintenance joints.

Adopt above-mentioned scheme, the drainage connects the seam crossing that sets up at the adjacent mould lining in tunnel, pass through the drain pipe through the longitudinal drainage pipe that the drainage connects to set up between waterproof layer and secondary lining and be connected with tunnel drainage system, thereby derive the percolating water between waterproof layer and the secondary lining, in case the waterproof layer takes place the damage like this, can excrete the infiltration fast, avoid secondary lining directly to bear water pressure and take place the seepage, be equipped with the maintenance joint on the drainage connects in addition, the maintenance joint can be used to the later stage and penetrates the pipeline dredge and clean the mediation, thereby conveniently maintain whole drainage system, prevent that drainage system from becoming invalid.

In the embodiment, the longitudinal drainage pipeline has a circular, semicircular or rectangular cross section and an inner diameter of 1-3 cm. The circumferential distance of the longitudinal drainage pipelines is 30-100 cm, the distance is determined according to the size of water outlet on the surface of the primary support, a small value is taken when the water outlet is large, and a large value is taken otherwise.

In this embodiment, the drainage connects for the five-way connecting piece, and the five-way connecting piece material is stainless steel, alloy steel, stereoplasm aluminum product or engineering plastics that the durability is good, intensity is high, the drainage connects including two hoop joints, two longitudinal joints and one maintenance joint that communicate each other, the hoop connects and makes the adjacent vertical drainage pipe intercommunication of hoop with the hoop drainage pipe intercommunication, and the adjacent vertical drainage pipe of axial communicates each other through the longitudinal joint.

In this embodiment, the maintenance joint is provided with an internal thread, the sealing member is a sealing bolt, and the maintenance joint is sealed by the sealing bolt.

In this embodiment, the longitudinal drainage pipeline is a blind pipe or a permeable pipe.

To sum up, the utility model discloses can excrete the infiltration fast, avoid secondary lining directly to bear water pressure and take place the seepage, it is fixed that the setting of maintaining the joint had both been convenient for to install, penetrates the pipeline dredge by can being used to the later stage and cleans the mediation, and the steel wire that excels in ensures vertical drainage pipe on the one hand straight, and on the other hand can be used to laying of waterproof layer to hang, reduces construction cost, consequently, the utility model has the advantages of the material is few, simple to operate, quality easy control, the function is reliable and easy to maintain.

Drawings

Fig. 1 is a schematic structural view of a passive drainage system between tunnel lining layers.

Fig. 2 is a schematic structural view of the drainage joint of the present invention.

FIG. 3 is a view showing the construction state of the present invention.

Fig. 4 the utility model discloses fixing bolt and drainage articulate installation schematic diagram.

FIG. 5 is a schematic view of the installation of the drainage joint, the longitudinal drainage pipe and the high-strength steel wire of the present invention.

Fig. 6 is a schematic structural view of the maintenance joint in the non-maintenance state of the present invention.

Fig. 7 is a schematic structural view of the maintenance joint in the maintenance state of the present invention.

In the figure: 1-longitudinal drainage pipes; 2-a drainage joint; 3-waterproof layer; 4-secondary lining; 5-lining the end; 6-a water drain pipe; 7-a circumferential joint; 8-longitudinal joint; 9-service joint; 10-a construction rack; 11-fixing the bolt; 12-primary support; 13-a blind pipe; 14-high strength steel wire; 15-sealing bolts; 16-scale; 17-a pipeline dredger; 18-high pressure spray head.

Detailed Description

For a better understanding of the present invention, the following detailed description of the present invention is provided in conjunction with the accompanying drawings and the embodiments, however, the present invention is not limited thereto, and the protection scope of the present invention also relates to the equivalent technical means that can be conceived by those skilled in the art according to the inventive concept.

Example 1:

referring to fig. 1 and 2, the tunnel lining interlayer passive drainage system comprises a longitudinal drainage pipeline 1 arranged between a waterproof layer 3 and a secondary lining 4 along the longitudinal direction of a tunnel and a drainage joint 2 arranged at a lining end 5, wherein the drainage joint 2 comprises a five-way connecting piece connected by circumferential drainage pipes, the drainage joint 2 comprises two circumferential joints 7, two longitudinal joints 8 and a maintenance joint 9, the circumferential joints 7 of adjacent drainage joints 2 are communicated through circumferential drainage pipes, the longitudinal joints 8 are communicated with the longitudinal drainage pipeline 1, the maintenance joint 9 is sealed through a sealing bolt 15, and the drainage joint 2 is made of stainless steel, alloy steel, aluminum or engineering plastics with high strength and good durability. The lower part of the drainage joint 2 is communicated with a tunnel drainage system through a drain pipe 6. When the waterproof layer 3 between the tunnel lining layers is damaged due to various reasons, water can penetrate through the waterproof layer, passively enters the longitudinal drainage pipeline 1, flows to the drainage joint 2 at the lining end 5 and enters the tunnel drainage system through the drainage pipe 6, and therefore leakage caused by water pressure formed on the secondary lining 4 is avoided.

Referring to fig. 3 to 6, the drainage system is constructed by the following method: firstly, a construction bench 10 with enough rigidity and stability is manufactured, fixing bolts 11 are arranged on the construction bench 10 according to a preset distance, the fixing bolts 11 are screwed into the maintenance joints 9 of the drainage joint 2, and therefore the drainage joint 2 is pressed against primary supports 12 on which the waterproof layer 3 is laid. Then, a high-strength steel wire 14 is inserted into the longitudinal joint 8 of the adjacent drainage joint 2, the blind pipe 13 is sleeved outside the adjacent longitudinal joint 8, the high-strength steel wire 14 is tensioned by tensioning equipment, and the drainage joint 2, the blind pipe 13 and the high-strength steel wire 14 are all tightly attached to the waterproof layer 3 and the primary support 12. After the installation is finished, the secondary lining 4 can be poured. After the secondary lining 4 reaches the stripping strength, the fixing bolt 11 is loosened, the high-strength steel wire 14 is drawn out, and the longitudinal drainage pipeline 1 is formed between the waterproof layer 3 and the secondary lining 4. In order to avoid seepage water from flowing out of the maintenance joint 9, the sealing bolt 15 is screwed into the maintenance joint 9 after construction is completed, and sealing is ensured.

Referring to fig. 7, the maintenance method of the drainage system includes: after the tunnel is operated for a plurality of years, silt or scale 16 can be deposited in the longitudinal drainage pipeline 1, the sealing bolt 15 is screwed out, the pipeline dredging device 17 extends into the maintenance connector 9, the high-pressure spray head 18 is used for spraying high-pressure water flow or air flow to cut, impact and wash the scale 16, and the drainage function of the longitudinal drainage pipeline 1 is recovered. After the maintenance is finished, the sealing bolt 15 is screwed in again, and the normal operation is recovered.

The above embodiments are merely illustrative of the principles and effects of the present invention, and are not to be construed as limiting the invention. Modifications and variations can be made to the above-described embodiments by those skilled in the art without departing from the spirit and scope of the present invention. Accordingly, it is intended that all equivalent modifications or changes which may be made by those skilled in the art without departing from the spirit and technical spirit of the present invention be covered by the claims of the present invention.

Claims

1. A passive drainage system between tunnel lining layer which characterized in that: the water drainage system comprises a plurality of longitudinal drainage pipelines and drainage joints, wherein the longitudinal drainage pipelines are arranged between a waterproof layer and a secondary lining and are distributed along the circumferential direction of a tunnel, the drainage joints are arranged at the joints of adjacent mould linings, the longitudinal drainage pipelines are used for collecting water leakage between the waterproof layer and the secondary lining, the longitudinal drainage pipelines are distributed along the extending direction of the tunnel, the end part of each longitudinal drainage pipeline is connected with one drainage joint, the drainage joints on the adjacent longitudinal drainage pipelines are communicated through the circumferential drainage pipelines, the tail ends of the circumferential drainage pipelines are communicated with the tunnel drainage system through drain pipes, maintenance joints which are communicated with the drainage joints and are distributed along the radial direction are arranged on the drainage joints, the maintenance joints penetrate through the secondary lining to the inner side surface of the tunnel, and the.

2. The tunnel lining interlaminar passive drainage system of claim 1, wherein: the drainage connects for the five-way connecting piece, the drainage connects including two ring joints, two longitudinal joints and a maintenance joint that communicate each other, the ring joint makes the adjacent longitudinal drainage pipe intercommunication of ring with the ring drainage pipe intercommunication, and the adjacent longitudinal drainage pipe of axial communicates each other through longitudinal joint.

3. The tunnel lining interlaminar passive drainage system of claim 1, wherein: the maintenance joint is provided with internal threads, the sealing element is a sealing bolt, and the maintenance joint is sealed through the sealing bolt.

4. The tunnel lining interlaminar passive drainage system of claim 1, wherein: the longitudinal drainage pipeline is a blind pipe or a permeable pipe.

5. The tunnel lining interlaminar passive drainage system of claim 1, wherein: the longitudinal drainage pipeline is circular, semicircular or rectangular in cross section, and the inner diameter of the longitudinal drainage pipeline is 1-3 cm.

6. The tunnel lining interlaminar passive drainage system of claim 1, wherein: the circumferential distance of the longitudinal drainage pipelines is 30-100 cm.