Shield end socket reinforcing system of scree soil layer advance large pipe roof and construction method thereof

Abstract

The invention relates to a shield end socket reinforcing system of a scree soil layer advance large pipe roof and a construction method thereof. When a stratum where a shield enters and exits a hole is reinforced in a common soil layer, ground high-pressure spiral spraying or ground PVC (polyvinyl chloride) grouting reinforcement is often adopted, and the reinforcing effect of a scree soil layer is difficult to control. The shield end socket reinforcing system of the scree soil layer advance large pipe roof comprises glass fiber reinforced polymer rebar fender posts which are constructed around a shield well, wherein pipe roof guide walls are constructed among the posts and are located above an arch of a shield tunnel; longitudinal pipe roof guide steel pipes are pre-buried in the glass fiber reinforced polymer rebar fender posts and the pipe roof guide walls above the arch of the shield tunnel; the pipe roof guide steel pipes cover within the range of the arch of the shield tunnel in an equal interval; a big pipe roof is arranged from the pipe roof guide steel pipes to the stratum and is a slip casting steel flower pipe. According to the invention, the single reinforcing mode such as common full-fracture surface ground spiral spraying or ground PVC slip casting can be changed, the construction is convenient, the investment is saved, the influence of the end socket reinforcement to the ground is greatly reduced, and the whole reliability of the shield during entering or exiting the hole is increased.

Description

technical field [0001] The invention belongs to the technical field of tunnel construction, and in particular relates to a shield end reinforcement system and a construction method for an advanced large pipe shed in a pebble soil layer. Background technique [0002] The 21st century is a period of rapid development of underground engineering, especially in recent years, the construction of my country's subway engineering is in full swing. The wide application of shield tunneling in different formations all over the country has put forward higher requirements for the reinforcement method of the foundation reinforcement of the entry and exit holes. If the entrance and exit holes of the shield tunneling in the pebble soil layer are reinforced by conventional high-pressure rotary spraying on the ground or PVC grouting on the ground, it is difficult to implement and the reinforcement effect is difficult to guarantee, and the conventional full-section reinforcement method does no...

AI Technical Summary

Problems solved by technology

If the entrance and exit holes of the shield tunneling in the pebble soil layer are reinforced by conventional high-pressure rotary spraying on the ground or PVC grouting on the ground, it is difficult to implement and the reinforcement effect is difficult to guarantee, and the conventional full-section reinforcement method does not make full use of the pebble soil layer after precipitation. The upright stability caused a lot of engineering waste

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