Water bag type pressure adjusting device and pressure adjusting method

Abstract

The invention relates to the technical field of immersed tube tunnels, in particular to a water bag type pressure adjusting device and a pressure adjusting method. The water bag type pressure adjusting device comprises a small jacking-pushing beam which is arranged inside a groove of a final connection head, and the small jacking-pushing beam is of a sealed and ring-shaped structure. The end portions of the small jacking-pushing beam and the final connection head are provided with a first water stop system, a gap between the small jacking-pushing beam and the final connection head is further internally provided with a second water stop system, and a ring-shaped water bag is formed between the first water stop system and the second water stop system. The second water stop system is a one-way water stop system, and seawater can only enter the ring-shaped water bag from the outside. After the external seawater enters the ring-shaped water bag, the water pressures on the two sides of the first water stop system are kept the same all the time in the installation and use processes of the final connection head, therefore the first water preventing system is protected, and the situation that the installation of the final connection head is affected due to the fact that the first water stop system is borne with too much pressure and damaged is avoided, and the smooth and safe construction is guaranteed.

Description

technical field [0001] The invention relates to the technical field of immersed tube tunnels, in particular to a water bladder type pressure regulating device and a pressure regulating method. Background technique [0002] Immersed tube method tunnel construction is to float and transport the prefabricated tunnel caissons in semi-submerged barge or dry dock to the predetermined position for sinking and docking. In order to make the last pipe section sink smoothly, it is necessary to leave a space longer than this pipe section. , the butted pipe section placed in the remaining distance space is regarded as the final joint. [0003] The structure of the final joint of the immersed tube tunnel is as follows: figure 1 As shown, the end of the final joint 1 connected to the adjacent pipe section 2 is provided with a groove, and a jack 3 and a pushing beam 4 are arranged in the groove, and the end of each pushing beam 4 is parallel to the final The end face of the joint, the end...

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to: when draining the joint cavity formed between the final joint and adjacent pipe joints, the first water stop system arranged between the outer wall of the pushing beam and the final joint is subject to high pressure and is easily damaged To solve the problem, a water bag type pressure regulating device and a pressure regulating method are provided. By setting a second water stop system in the gap between the pushing girder and the final joint, the first water stop system and the second water stop system A closed water bladder structure is formed between the system and the push beam and the final joint to keep the water pressure on both sides of the first water stop system the same, thus forming a protection for the first water stop system

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