High-water-pressure shield tunnel segment joint multi-channel waterproof device of reserved grouting hole

Abstract

The invention relates to a high-water-pressure shield tunnel segment joint multi-channel waterproof device of a reserved grouting hole. The device is used for performing waterproof sealing on a jointbetween an adjacent first shield tunnel segment and second shield tunnel segment, and is characterized by comprising a first-channel elastic sealing pad waterproof structure, a second-channel elasticsealing pad waterproof structure and a third-channel grouting layer waterproof structure, wherein the first-channel elastic sealing pad waterproof structure is arranged on the external channel of thejoint, the second-channel elastic sealing pad waterproof structure is arranged on the internal channel of the joint, and the third-channel grouting layer waterproof structure is arranged in waterproofsealing space formed by the first-channel elastic sealing pad waterproof structure and the second-channel elastic sealing pad waterproof structure. Compared with the prior art, the high-water-pressure shield tunnel segment joint multi-channel waterproof device of the reserved grouting hole has the advantages that the device has multiple channels of waterproof systems, the cost is reduced, and design indexes of an elastic sealing pad can be adjusted.

Description

technical field [0001] The invention relates to the field of shield tunnel waterproofing engineering, in particular to a multi-channel waterproof device for seams of high-pressure shield tunnel segments with grouting holes reserved. Background technique [0002] With the continuous development of underground space, the scope of human activities continues to expand. Shield tunnels are widely used in urban rail transit tunnels and cross-river and sea-crossing tunnels because of their advantages such as fast construction speed, high degree of mechanization, and low construction impact. With the continuous improvement of the technical level and the continuous improvement of the use demand, the shield tunnel is constantly developing in the direction of long distance, large cross-section and high water pressure, so the technical challenges it faces are becoming more and more difficult. [0003] As a part of the main work affecting the long-term performance of shield tunnels, water...

AI Technical Summary

Problems solved by technology

In the process of gasket section and hardness optimization design, it is often limited by the closing compression force

[0007] (2) The local shear force at the corner of the segment is large

[0008] Gaskets require high contact stress, which means that the grooves at the corners of the segments are also subjected to a large corner shear stress. In actual engineering, due to improper construction, it is easy to cause damage to the corners of the segments, which directly affects the joints of the segments. Seam waterproof effect

[0009] (3) The safety factor due to consideration of long-term performance impact is too large

It has brought great challenges to the optimization design of the gasket section

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