Multi-section compaction-type sleeve valve pipe and grouting method thereof

Abstract

The invention relates to a multi-section compaction-type sleeve valve pipe and a grouting method thereof. According to the multi-section compaction-type sleeve valve pipe and the grouting method thereof, the structure is simple, construction is convenient, the grouting range is effectively controlled, the phenomena of grout spillover and grout runout are avoided, and the horizontal excursion and convergence deformation of a tunnel are accurately controlled. According to the technical scheme, the multi-section compaction-type sleeve valve pipe comprises a grouting outer pipe, a tip connected to the lower end of the outer pipe and a grouting inner pipe coaxially arranged inside the outer pipe; the lower portion of the outer pipe is a grouting section, and a plurality of rubber valves communicating with the inside and the outside of the outer pipe are uniformly arranged on the grouting section of the outer pipe; the position, corresponding to the grouting section of the outer pipe, on the outer pipe is sleeved with an geotechnical cloth cover, and the geotechnical cloth cover is fixed to the outer pipe in a segmented mode by a certain length through a plurality of fixing rings; and the position between the geotechnical cloth cover and the outer pipe is divided into a plurality of cavities through the fixing rings. The multi-section compaction-type sleeve valve pipe and the grouting method thereof are suitable for the field of foundation engineering construction.

Description

technical field [0001] The invention relates to a multi-stage compacted sleeve valve pipe and a grouting method thereof. Applicable to the field of foundation engineering construction. Background technique [0002] With the rapid development of my country's urban rail transit construction, a large number of shield tunnels have been built in the deep soft soil areas along the southeast coast of my country. Through the monitoring and inspection of shield tunnels built in soft soil areas, longitudinal uneven settlement and excessive lateral deformation are important disease forms of tunnels during the operation period, which will cause damage to the tunnel structure and failure of waterproofing, threatening the operational safety of the tunnel . The "micro-disturbance two-liquid grouting technology" adopts the sleeve valve pipe grouting process, and controls the excessive deviation and convergence deformation of the tunnel by grouting on both sides of the tunnel, and has achi...

AI Technical Summary

Problems solved by technology

[0003] However, a large number of engineering practices have shown that the conventional sleeve valve grouting technology mainly produces horizontally split grout veins in the soil, and its effect of vertically lifting the soil is better than that of horizontal displacement control; at the same time, the grout The diffusion range is difficult to control, and it is easy to produce the phenomenon of escaping and running out of slurry, and cannot form a continuous grouting body

The conventional sleeve valve pipe grouting method cannot accurately control the convergence deformation of the tunnel, and is prone to secondary tunnel damage

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