Double-wall small guide pipe grouting device and construction method thereof

Abstract

The invention discloses a double-wall small guide pipe grouting device and a construction method thereof. The double-wall small guide pipe grouting device comprises a first grouting pipe, a second grouting sleeve sleeves the upper end of the first grouting pipe, a first gate valve is arranged at the position, located on the first grouting pipe, of the upper part of the second grouting sleeve, a second gate valve is arranged at the position, located on the second grouting sleeve, close to the first gate valve, first grouting holes are evenly distributed at the position, located on the first grouting pipe, of the lower part of the second grouting sleeve, and second grouting holes are evenly distributed at the position, located on the second grouting sleeve, of the lower part of the second gate valve. The double-wall small guide pipe grouting device has the beneficial effects of high construction speed, good grouting effect, simple structure, convenient use, good grouting effect and low cost.

Description

technical field [0001] The invention relates to a grouting device and method, in particular to a double-wall small conduit grouting device and a construction method thereof. Background technique [0002] In my country, the area is large, the geological and hydrological conditions are complex and changeable, the transportation industry is becoming more and more mature, and the number of tunnels built has been increasing. The tunnel construction methods have been continuously innovated and developed from the traditional mine method and tunnel boring machine method; Changes have gradually derived many new construction methods and new processes. At present, the most used methods in China are: the new Austrian method and the shallow buried underground excavation method. With the diversification of tunnel excavation, there are more and more unforeseen geological conditions. Especially in Yunnan-Guichuan, where there are many rocks with no joints and cracks, such as mudstone and silt...

AI Technical Summary

Problems solved by technology

[0003] About tunnel in the rock stratum that joint fissure does not develop at present, existing is to adopt the mode of grouting pipe (13) grouting, as Figure 4 As shown, the upper end of the grouting pipe (13) is provided with a gate valve (12), the grouting pipe (13) on one side of the gate valve (12) hole is evenly distributed with grouting holes (14), and the other end of the grouting pipe (13) It is a tapered structure (11). Firstly, in the grouting area, turn the hole, clear the hole, insert the grouting pipe, grout, and seal the hole. However, when grouting in the prior art, when the grouting pressure is too large, the grout It is easy to flow back out between the grouting pipe and the hole, so the grouting pressure of the prior art is 0.5-1Mpa, and the diffusion radius of the grouting is 0.3-0.5m. There are low grouting efficiency, slow construction speed, and grouting Poor effect and high cost of grouting

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