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Rectification method for immersed tube tunnel

An immersed tube tunnel and deviation correction technology, applied in water conservancy projects, artificial islands, underwater structures, etc., can solve the problems of high requirements for deviation correction equipment, difficult underwater operation, and large immersed tube volume, so as to reduce construction costs, Cost saving and simple construction process

Active Publication Date: 2014-07-09
CCCC FIRST HARBOR ENG +1
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AI Technical Summary

Problems solved by technology

Due to the large volume and weight of the immersed tube, the deviation correction by external force requires high requirements for the deviation correction equipment, and the operation in water is difficult

Method used

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  • Rectification method for immersed tube tunnel
  • Rectification method for immersed tube tunnel
  • Rectification method for immersed tube tunnel

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Experimental program
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Embodiment Construction

[0040] see figure 1 As shown, a deviation correction method for an immersed tube tunnel of the present invention, the deviation correction method includes the following steps:

[0041] 1. The following commissioning preparations need to be done before the deviation correction operation:

[0042] 1. The surveyor conducts penetration measurement in the immersed tube, and records the deviation value at the end of the immersed tube, and compares the deviation value at the end of the immersed tube with the allowable deviation value to judge whether it is necessary to correct the deviation;

[0043] 2. When the deviation value exceeds the allowable deviation range, deviation correction is required;

[0044] 3. Report the deviation value, and calculate the required pushing stroke of the jack group according to the deviation value;

[0045] 4. Prepare the required deviation correction equipment;

[0046] 5. Steps to make the deviation correction operation meet the constraints of th...

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Abstract

The invention provides a rectification method for an immersed tube tunnel. The rectification method comprises a step of mounting a jack group in a joint chamber, a step of controlling the jack group to jack up a tube section to be adjusted until completion, a step of backfilling at the two sides of the immersed tube, a step of removing the jacking force of the jack group, and a step of detaching the jack group. Due to the adopted steps, the jack group is mounted in the jointed chamber to perform fine adjustment rectification on the immersed tube in the chamber, and therefore, the rectification difficulty of the immersed tube under water can be reduced, the construction cost can be reduced and the rectification precision can be improved; air can be charged into the jointed chamber so that the total pressure in the joint chamber is basically equal to the sum of water pressure outside the tube section to be adjusted and the frictional force of a foundation bed, and therefore, the tube section to be adjusted is located in a dynamic-static critical state; rectification can be realized by just applying relatively low jacking force to the immersed tube by using the jack group of a relatively small size, and therefore, the size of the jack group is effectively reduced and then the jack group can be matched with the relatively small space of the joint chamber.

Description

technical field [0001] The invention relates to a deviation correction method for an immersed tube tunnel, in particular to a method for finely adjusting and correcting the tail end of the immersed tubes in the joint cavity between the immersed tubes. Background technique [0002] At present, highway subsea tunnels are connected by a plurality of immersed tubes. The volume and weight of the immersed tubes are quite large. Generally, the length is about 100-200 meters. The immersed tubes are installed on the pre-laid foundation bed. The butt ends of each immersed tube are installed with GINA waterstops, which act as a seal. During the sinking and docking process of each immersed tube, both ends are sealed with end seals. Between the end seals and the GINA waterstop forms a junction cavity. After the butt joint of the immersed tubes is completed, although the joint cavity has been sealed well, there may be an axis deviation at the end of the newly placed immersed tube. When t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E02D29/073
Inventor 林鸣李一勇翟世鸿刘亚平梁萌刘金秋彭瑞刘德进曲俐俐冯海暴宿发强苏长玺王强马宗豪
Owner CCCC FIRST HARBOR ENG
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