Grouting bag and application method

A grouting bag and grouting technology, applied in water conservancy projects, artificial islands, underwater structures, etc., can solve the problems of vertical steel shear keys that cannot be effectively cushioned, uneven settlement of pipe joints, and failure of shear structures and other problems, to avoid local stress concentration problems, occupy a small space, and achieve the effect of safe and convenient construction

Inactive Publication Date: 2017-12-29
CCCC FOURTH HARBOR ENG CO LTD +3
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to: in the construction of the shear structure of the pipe joint joints of the immersed tunnel, due to the small working space and the uneven settlement of the pipe joints, the vertical s

Method used

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  • Grouting bag and application method
  • Grouting bag and application method

Examples

Experimental program
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Example Embodiment

[0033] Example 1

[0034] The invention provides a grouting bladder;

[0035] Such as figure 1 As shown, the grouting bag 1 in this embodiment includes an integrally sealed bag body 11, which can be customized in shape and size according to the needs of use. The bag body 11 is provided with two grouting ports 12 for use. In the grouting or exhausting process, the bag body is made of elastic material. When the solidified slurry is injected into the bag body 11, the bag body can automatically expand as the slurry enters.

[0036] The grouting bladder in the present invention is integrally sealed and made of elastic material, and has certain plasticity and ductility. When grouting into the bag, the volume can expand and fill the space where it is located. At the immersed pipe joint, there is a pipe joint. In the irregular shear support system formed by uneven settlement, the grouting pouch can fully fill the space around its location, and through its own deformation, it adheres to the ...

Example Embodiment

[0039] Example 2

[0040] The present invention also provides a method for using the grouting capsule, which includes the following steps:

[0041] a, such as figure 2 As shown, the vertical steel shear key 3 and the steel shear key 2 4 are connected to the embedded parts of the immersed pipe end 5 and the second end 6 of the immersed pipe respectively after being fastened by high-strength bolts. Put the steel backing plate 2 between the shear key 1 3 and the steel shear key 2 4;

[0042] b. Place the grouting bag 1 in the middle of the steel backing plate 2 so that the grouting port 12 on the grouting bag 1 faces the outside and connect the grouting pipe;

[0043] c. Pour a solidified slurry into the grouting bag 1 and stop the grouting when the grouting pressure reaches the requirement and the pressure is maintained for a period of time.

[0044] The method of using the grouting bladder is to place a steel backing plate between the steel shear keys to reduce the distance between th...

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Abstract

The invention discloses a grouting bag and an application method. The grouting bag comprises an integrally-sealed bag body. The bag body is provided with at least one grouting port, and the bag body is made of elastic materials. When slurry capable of being cured is injected into the bag body, the bag body can be automatically expanded along with inflow of slurry. After grouting of the grouting bag, the space around the position where the grouting bag is located can be fully filled, the grouting bag is closely attached to the part between two steel shear keys through deformation of the grouting bag, and after the slurry is solidified, an anti-shear structure achieving shear force transmission through a cushion layer is formed between the two steel shear keys, good adaptability and high practicability are achieved in an immersed tunnel irregular anti-shear support system, and the problem of local stress concentration caused by other connecting manners can be effectively avoided; and meanwhile, the grouting bag can be used in the place with the narrow operation space, and due to the construction convenience of the grouting bag, the construction cost can be effectively reduced.

Description

technical field [0001] The invention relates to the technical field of immersed tube tunnel construction, in particular to a grouting bag and its application method in the irregular shear support system of the immersed tube tunnel. Background technique [0002] In recent years, with the continuous increase of cross-sea tunnel projects, the immersed tube method has been more and more used in the construction of subsea tunnels. Immersed tube tunnels generally float and transport several factory-prefabricated pipe joints to the sea surface site, and connect the pipe joints on the seabed and sink them in the dredged foundation trench. Adjacent pipe joints use GINA waterstops and OMEGA waterstops for waterstopping. The flexible connection joint can effectively adapt to the error generated during the installation of the pipe joint and the uneven settlement after the pipe joint is placed in place, ensuring the safety factor and watertightness of the immersed tube tunnel. [0003]...

Claims

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Application Information

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IPC IPC(8): E02D29/073E02D29/16
CPCE02D29/073E02D29/16
Inventor 黄文慧董政张文森季亮王蔚姚辉博
Owner CCCC FOURTH HARBOR ENG CO LTD
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