CN204357484U - The drainage system of anti-tunnel invert constuction joint infiltration - Google Patents

Abstract

The utility model discloses a drainage system for preventing water seepage in construction joints of inverted arches of tunnels. and the pavement layer, a central ditch extending along the longitudinal direction of the tunnel is provided in the inverted arch filling layer, and side ditch extending along the longitudinal direction of the tunnel are respectively provided on both sides of the pavement layer, and the gutters on both sides pass through the ballast bed drainage pipe respectively. It is connected with the central water ditch, and there are pressure relief pipes at intervals along the longitudinal direction of the tunnel under the central water ditch. The secondary lining of the arch and the initial support of the inverted arch are connected with the bedrock surface of the tunnel bottom. When the accumulated water behind the lining concrete collects at the bottom of the tunnel and generates water pressure, the pressure discharge pipe can discharge the accumulated water into the central ditch of the tunnel, and then drain the central ditch to the outside of the tunnel, thus effectively solving the problem of inverted arch construction. Seam seepage problem.

Description

Drainage system for preventing water seepage in tunnel inverted arch construction joints

technical field

The utility model relates to a tunnel engineering waterproof and drainage construction technology, in particular to a drainage system for preventing water seepage in tunnel inverted arch construction joints.

Background technique

During the implementation of the traditional technology of tunnel engineering waterproofing and drainage, there are phenomena such as installation deviation of the inverted arch ring waterstop, weak bonding, and damage due to construction, which weakens its waterproof performance. After the tunnel lining is completed, when the accumulated water behind the lining concrete collects at the bottom of the tunnel and generates water pressure, water seepage in the construction joints of the inverted arch is very easy to occur, and the later treatment is difficult, long-term treatment, high safety risks, and heavy losses of economic and social benefits .

Therefore, it is necessary to improve the existing tunnel drainage system.

Contents of the invention

The purpose of the utility model is to provide a drainage system for preventing water seepage in tunnel inverted arch construction joints, which can discharge the accumulated water at the tunnel bottom into the central ditch of the tunnel, effectively solving the problem of water seepage in the construction joints caused by the water pressure at the bottom of the tunnel.

In order to achieve the above purpose, the utility model provides a drainage system for preventing water seepage in the construction joints of the inverted arch of the tunnel, including the initial support of the inverted arch and the secondary lining of the inverted arch arranged in sequence from the bedrock surface of the tunnel bottom to the road surface or track surface. 1. Inverted arch filling layer and pavement layer. In the inverted arch filling layer, there is a central ditch extending along the longitudinal direction of the tunnel. On both sides of the pavement layer, side gutters extending along the tunnel longitudinal direction are respectively provided. The gutters on both sides The drainage pipes of the ballast bed are respectively connected with the central water ditch. The key point is that a pressure relief pipe is arranged at intervals along the longitudinal direction of the tunnel under the central water ditch. The upper end of the pressure relief pipe communicates with the central water ditch, and the lower end It passes through the filling layer of the inverted arch, the secondary lining of the inverted arch, and the primary support of the inverted arch in sequence, and is connected with the bedrock surface of the tunnel bottom.

The upper end of the pressure discharge pipe communicates with the central ditch and extends into the central ditch, and the lower end of the pressure discharge pipe vertically passes through the filling layer of the inverted arch, the secondary lining of the inverted arch, the primary support of the inverted arch and connects with the tunnel foundation. The rock faces are connected.

The beneficial effects of the utility model are:

(1) Set pressure relief pipes at intervals along the longitudinal direction of the tunnel under the central water ditch to connect the central water ditch of the tunnel with the bedrock surface of the tunnel bottom to form a drainage channel. When the accumulated water behind the lining concrete collects at the bottom of the tunnel and generates water pressure, the accumulated water can be discharged into the central ditch of the tunnel, thus effectively solving the problem of water seepage in the inverted arch construction joints.

(2) The utility model has the advantages of simple construction, simple required mechanical equipment, and low cost investment, and can effectively solve the problem of water seepage in the construction joints of the inverted arch of the tunnel. It reduces the high economic cost, reputation cost and high-level safety risk of seepage control and plugging after tunnel operation. It has remarkable economic benefits, outstanding social benefits, strong practicability, good promotion and application value, and good development prospects.

Description of drawings

Fig. 1 is the structural representation of the utility model.

Detailed ways

Below in conjunction with accompanying drawing, the utility model is further described.

As shown in Figure 1, the drainage system for preventing water seepage in the construction joints of the inverted arch of the tunnel includes the initial support of the inverted arch 2, the secondary lining of the inverted arch 3, the inverted arch primary support 2, the inverted arch secondary lining 3, and the inverted arch that are arranged in sequence from the tunnel bedrock surface 1 to the road surface or track surface 10. Arch filling layer 4 and pavement layer 5. In the inverted arch filling layer 4, there is a central ditch 8 extending along the longitudinal direction of the tunnel, and side ditch 6 extending along the longitudinal direction of the tunnel are respectively arranged on both sides of the pavement layer 5, and the ditch 6 on both sides is respectively drained through the ballast bed. The pipe 7 communicates with the central gutter 8 . Under the central water ditch 8, pressure relief pipes 9 are arranged at intervals along the longitudinal direction of the tunnel. The upper ends of the pressure relief pipes 9 communicate with the central water ditch 8 and extend into the central water ditch 8. Pass through the inverted arch filling layer 4, the inverted arch secondary lining 3, the inverted arch primary support 2, and communicate with the tunnel bottom rock surface 1. When the accumulated water behind the lining concrete collects at the tunnel bottom and generates water pressure, the pressure relief pipe 9. The backlog of water can be discharged into the central water ditch 8 of the tunnel, and then discharged from the central water ditch 8 to the outside of the tunnel.

During the construction of the initial support of the inverted arch 2, the secondary lining of the inverted arch 3, and the filling layer 4 of the inverted arch, a pressure relief pipe 9 is pre-buried on the center line of the tunnel along the longitudinal direction of the tunnel at a certain distance, so that the central ditch 8 A drainage channel is formed between the bedrock surface 1 of the tunnel bottom. After the pressure discharge pipe 9 is set, the nozzle should extend into the center ditch 8 and be higher than the flowing water surface in the center ditch 8 . The discharge pipe 9 is connected in stages using standard joints of corresponding models, and the setting interval is determined according to the amount of rich water in the tunnel.

The utility model is suitable for general tunnels, especially for rich water tunnels. The above are preferred embodiments of the present utility model, and any modification, equivalent replacement and improvement made within the spirit and principles of the present utility model shall be included within the protection scope of the present utility model.

Claims (2)

1. A drainage system for preventing water seepage in tunnel inverted arch construction joints, comprising an inverted arch initial support (2) and an inverted arch secondary support set in sequence from the tunnel bedrock surface (1) to the road surface or track surface (10). Lining (3), inverted arch filling layer (4) and pavement layer (5), in the inverted arch filling layer (4) is provided with a central ditch (8) extending along the longitudinal direction of the tunnel, and in the pavement layer (5) Side water ditches (6) extending along the longitudinal direction of the tunnel are arranged on both sides respectively, and the water ditches (6) on both sides are respectively connected with the central water ditch (8) through the ballast bed drainage pipe (7). The lower part of (8) is provided with pressure relief pipes (9) at intervals along the longitudinal direction of the tunnel. The arch filling layer (4), the secondary lining of the inverted arch (3), the primary support of the inverted arch (2) are connected with the foundation rock surface of the tunnel bottom (1). 2. The drainage system for preventing water seepage in tunnel inverted arch construction joints according to claim 1, characterized in that: the upper end of the pressure relief pipe (9) communicates with the central ditch (8) and extends into the central ditch (8) ), the lower end of the pressure discharge pipe (9) vertically passes through the inverted arch filling layer (4), the inverted arch secondary lining (3), the inverted arch primary support (2) and connects with the tunnel bottom bedrock surface (1) connected.