Method for constructing maintainable tunnel waterproof system

Abstract

The invention discloses a method for constructing a maintainable tunnel waterproof system, which comprises the following steps: jetting a concrete layer and paving a waterproof layer on the wall rock of a tunnel, taking each mould of lining as a waterproof sub-area and pre-embedding a plurality of slip casting pipes outside the waterproof layer on central parts of each sub-area and abutted parts of every two adjacent sub-areas along a radial direction; pouring a molded concrete layer outside the waterproof layer in each sub-area so as to form an annular construction joint between the molded concrete layers of every two adjacent sub-areas; and processing the construction joints with a waterproof material. Through the construction method of the invention, the problem of the water leakage of the waterproof layer can be solved by pre-embedding the slip casting pipes, so the water leakage can be limited in the sub-area in a way of slip casting from the pre-embedded slip casting pipes once the water leakage occurs to the sub-area, which does not influence the normal operation of the tunnel, saves time and labor and ensures low maintenance cost. In addition, as the pre-embedded slip casting pipes can be reused, the whole waterproof system is maintainable.

Description

technical field [0001] The invention belongs to the technical field of tunnel construction, and in particular relates to a maintainable tunnel waterproof system construction method. Background technique [0002] The waterproof system of the tunnel is an important link in the process of tunnel construction, normal use and safe operation. Especially in the subsea tunnel, the waterproof system is particularly important, which is directly related to the success or failure of the tunnel construction and the use of functions. [0003] The tunnels built in the past are relatively backward in terms of waterproofing concept, waterproofing materials, waterproofing technology and equipment, so water seepage is inevitable, so water seepage control is the focus of tunnel maintenance. In the past ten years, waterproof design and construction have also undergone obvious changes. From the initial phenomenon that there are requirements but no design, it has developed to the use of polymer wa...

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Problems solved by technology

[0004] However, the current tunnel waterproof system design is mainly inclined to functional design, while there is little design for the integrity, dynamics and maintainability of waterproofing.

Due to the current lining technology, the arch of the tunnel lining structure is often not filled with concrete, so it is easy to form a vertical water channel in the arch. As long as one part of the waterproof layer is damaged, the groundwater will eventually flow into the molded concrete layer. It is connected with the waterproof layer, so it cannot really play the waterproof role of the waterproof layer

In addition, the waterproofing of construction joints is also unreliable, resulting in an unsatisfactory overall waterproofing effect

Therefore, in the event of water leakage, the only way to deal with it is to disembowel it. This will not only damage the structure of the tunnel, but also have a certain impact on the operation. As a result, it is labor-intensive and time-consuming, and the treatment effect is difficult to guarantee.

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