Final joint water stop device and installation method

Abstract

The invention belongs to the technical field of seabed immersed tunnel installation, and particularly relates to a final joint water stop device and an installation method. The final joint water stop device comprises a telescopic water stop belt, wherein the telescopic water stop belt is provided with a telescopic part, a first fixing part and a second fixing part, the first fixing part and the second fixing part are located at the two ends of the telescopic part correspondingly, the first fixing part is fixedly connected to the outer end face of an expanding section, and the second fixing part is fixedly connected to the peripheral face of a jacking section; before the jacking section is pushed out, the first fixing part is adjacent to the second fixing part, and the telescopic part is in a natural bending state between the first fixing part and the second fixing part; when the jacking section is pushed out, the jacking section drives the telescopic part to extend outwards; after the jacking section is pushed out in place, the telescopic part stretches out and flatly covers the peripheral face of the jacking section, and the stretchable length of the telescopic part is at least equal to the pushing-out distance of the jacking section. According to the final joint water stop device, sealing and water stopping between the jacking section and the expanding section during installation of a final joint are achieved, and the blank in the aspect of sealing and water stopping in construction of the final joint through a push-out type jacking section method is filled up.

Description

technical field [0001] The invention belongs to the technical field of submarine immersed tube tunnel installation, and in particular relates to a final joint water stop device and an installation method. Background technique [0002] The installation of the final joint is an important link in the installation process of the subsea tunnel. The position of the joint is selected at the junction of the immersed tube end and the buried section; The key process for the success or failure of tunnel construction. [0003] The final joint process of the current mature existing technology (such as the Hong Kong-Zhuhai-Macao Bridge) is an integral prefabricated installation type, such as figure 1 As shown, the cavity of the final joint body 1a is provided with a push beam 2a facing the pipe joint 7a, and a jack 8a is provided inside the push beam 2a, and the push beam 2a is pushed out by the jack 8a and pressed against the pipe joint 7a. Connect, so that the joint cavity is formed b...

AI Technical Summary

Problems solved by technology

The final joint of the push-out jacking segment method has a simple structure, is economical and practical, and can quickly and efficiently realize the underwater jacking of the final joint, and the jacking effect is good, safe and reliable; however, the waterstop of the final joint in the prior art or The water stop device is no longer suitable for the final joint of the push-out jacking section method of the latest technology. It is necessary to specially develop a set of water stop device that meets the sealing water-stop performance between the jacking section 2 and the expansion section 1, and fills the push-out jacking section method. Gaps in Sealing and Water-stopping in Construction of Final Joint by Jacking Segmental Method

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