Deepwater ground anchor grouting method

Abstract

The invention discloses a deepwater ground anchor grouting method. The deepwater ground anchor grouting method comprises the following steps that S1, a water-proof casing pipe is installed in an anchor hole, a grout inlet pipe and a grout return pipe are fixed to a cable body, a grout stopping bag is installed on the cable body, an outlet of the grout inlet pipe is close to the bottom of the anchor hole, a lower opening of the grout return pipe is located below the grout stopping bag, an upper opening of the grout return pipe is located above a cable joint, and an underwater detector is installed over the upper opening of the grout return pipe; S2, an anchor cable is placed in the water-proof casing pipe and placed in the anchor hole; S3, grouting grout prepared on site is injected into the anchor hole through the grout inlet pipe; and S4, when the underwater detector monitors that grout starts to return from the upper opening of the grout return pipe, the theoretical grouting amount which is 0.6-1.4 times that of the grout is injected continuously, and the theoretical grouting amount is the theoretical grout amount needed for filling the anchor hole. According to the deepwater ground anchor grouting method, the requirements that an underwater anchoring grouting solidified body is early in strength, high in strength, micro-expanded, good in groutability, free of corrosion to steel strands and the like can be met while the compactness of the grout is guaranteed.

Description

technical field [0001] The invention relates to the technical field of deep-water anchoring, in particular to a deep-water ground anchor grouting method, which can be widely used in underwater building repair, dam disease management, offshore fan foundation anchoring, underwater reinforcement and reinforcement projects, etc., and is especially suitable for Foundation anchoring works under deep water conditions. Background technique [0002] The anchoring of deep water foundation is quite different from the anchoring of land foundation, and the anchor hole is full of accumulated water. The anchor cable includes a cable body and a socket, wherein the cable body includes an anchor section, a transition section and a free section. The existing underwater grouting method includes installing a water-resistant casing in the anchor hole, weaving the grout inlet pipe and the grout return pipe into the cable body, and inserting the grout stop bag into the cable body, the first grout ...

AI Technical Summary

Problems solved by technology

As the water depth increases, the length of the grout return pipe also needs to be lengthened, and a huge grouting pressure is required to return the cement slurry to the water surface. Commonly used grouting pipes and grout return pipes cannot withstand such a large grouting pressure

At the same time, the existing underwater slurry has problems such as high water separation rate and low early strength in low temperature and deep water environment

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