Double sleeve valve pipe grouting construction method

Abstract

The invention discloses a double sleeve valve pipe grouting construction method. The double sleeve valve pipe grouting construction method comprises the following steps that work is prepared before construction; a drilling machine is in position and drills a hole, and a built-up hole is formed; a shell material is prepared, and the shell material is injected into the built-up hole to form a shell; the double sleeve valve pipe is mounted; the double sleeve valve pipe is formed by two sleeve valve pipes bundled together; and double sectional grouting is conducted through a grouting machine. Compared with the prior art, the double sleeve valve pipe grouting construction method avoids the deviation caused by the mix proportion of the theory or the experience in the construction, saves the excessive consumption of the materials such as cement, and greatly guarantees the effective diffusion radius of grouting solution, the construction speed is fast, batch construction can be conducted after the process is determined, the process is easy and without the need for large-sized construction equipment, the restriction of the site condition is small, a plurality of stir zones of the grouting solution can be arranged, the construction time can be greatly shortened, the construction speed can be improved, and the construction cost can be reduced; the double sleeve valve pipe grouting construction method is suitable for deep foundation pit excavation construction of fractured soil layers with different types; and the slope stability of the deep foundation pit is greatly improved.

Description

technical field [0001] The invention relates to the technical field of grouting, in particular to the grouting construction of a double sleeve valve pipe. Background technique [0002] With the development of building foundation pits in the direction of "big and deep", the problems of deep foundation pit enclosure construction technology are becoming more and more prominent, especially the problem of groundwater control in foundation pit engineering in high water level areas is becoming more and more important. The French Soletancle foundation company invented the Soletan repair method in the 1950s. It is a relatively advanced grouting construction technology and has been widely used in civil engineering circles at home and abroad. A series of research and development was carried out and it was called the sleeve valve pipe grouting method. [0003] Aiming at the sleeve valve pipe grouting method, after many experiments, it was found that there are some problems in the simpl...

AI Technical Summary

Problems solved by technology

[0003] Aiming at the sleeve valve pipe grouting method, after many experiments, it was found that there are some problems in the simple sleeve valve pipe construction method in such crack-developed areas: using sleeve valve pipe + pure cement slurry, cracks and caves develop, so inject pure water grout When grouting, the grouting fluid cannot solidify in a short time, resulting in a large diffusion radius, and it is difficult to fill all the cracks, resulting in a large amount of grouting and low grouting pressure; use sleeve valve tube + chemical grouting fluid ( Cement + water glass + accelerator), the mixing ratio is not easy to control, when the amount of water glass and accelerator is small, it will still not be able to solidify in a short time; after increasing the amount of water glass + accelerator, the injection of sleeve valve tube The grout inner pipe cannot move because the grout solidifies too fast