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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 steel shear keys cannot be effectively cushioned, thereby causing the overall anti-corrosion In the case of failure of the shear structure, a grouting bladder and a method for using the grouting bladder during construction are provided

Method used

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

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Embodiment 1

[0034] The invention provides a grouting bag;

[0035] Such as figure 1 As shown, the grouting bag 1 in this embodiment includes an integrally sealed bag body 11 whose shape and size can be customized according to the needs of use. The bag body 11 is provided with two grouting ports 12 for use During grouting or degassing in the process, the bag body is made of elastic material, and when curable grout is injected into the bag body 11, the bag body can expand automatically with the grout entering.

[0036]The grouting bag 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. In the irregular shear support system formed by uneven settlement, the grouting bladder can fully fill the space around its location, and through its own deformation, it can cling to the plane of the irregular steel shear key members on both sides , afte...

Embodiment 2

[0040] The present invention also provides a method for using the grouting pouch, comprising the following steps:

[0041] a. If figure 2 As shown, after the vertical steel shear key 3 and steel shear key 2 4 are respectively connected with the embedded parts of the first end 5 of the immersed tube and the second end 6 of the immersed tube through high-strength bolts, the steel shear key Put the steel backing plate 2 between the shear force key 1 3 and the steel shear force key 2 4;

[0042] b. Place the grouting bag 1 flat on the center of the steel backing plate 2, make the grouting port 12 on the grouting bag 1 face outward and connect the grouting pipe;

[0043] c. Inject curable grout into the grouting bladder 1, stop grouting when the grouting pressure reaches the requirement and maintain the pressure for a period of time.

[0044] The method of using the grouting bladder is to reduce the component spacing by placing steel backing plates between the steel shear keys, ...

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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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