End-free reinforcing shield receiving structure and receiving method

Abstract

The invention relates to an end-free reinforcing shield receiving structure and receiving method. The end-free reinforcing shield receiving structure and receiving method are safe, efficient, and low in construction risk. According to the technical scheme, the structure comprises a shield receiving well which is arranged at the outer side of a hole and is provided with a receiving well surrounding protecting structure and a receiving well structural wall. The end-free reinforcing shield receiving structure is characterized in that a cubic plain concrete block is poured by covering the hole inside the shield receiving well, a set of slip casting pipes are buried in the hole inside the plain concrete block in advance, one ends of the slip casting pipes penetrate through the two-layer surrounding protecting structure and enter a tunnel, the other ends of the slip casting pipes are bent by 90 degrees, pipe openings are cocked up to be exposed out of the plain concrete block, a set of long-pipe slip-casting pipes are buried at the upper portion of a receiving well baseboard at the bottom of the hole in the forward-moving direction of the channel in advance, and a long-pipe slip-casting pipe opening is exposed out of the plain concrete block. The end-free reinforcing shield receiving structure and receiving method are suitable for shield machine hole-entering and receiving in the implementation working condition that due to factors such as pipelines and traffic, shield ends are hard to reinforce.

Description

technical field [0001] The invention relates to a receiving structure and a receiving method of an endless reinforced shield tunnel, belonging to the technical field of shield tunnel construction, and is mainly applicable to the reception of a shield machine in a working condition where it is difficult to implement shield end reinforcement due to factors such as pipelines and traffic. Background technique [0002] The shield tunneling method has been widely used in underground engineering construction due to its advantages such as small impact on the ground and high safety. [0003] Currently, if figure 1 As shown in , the traditional shield reinforcement is to add the end reinforcement area 101 behind the tunnel, and then the shield machine will slowly remove it along the pre-excavation tunnel centerline 102 towards the tunnel, and then along the outer structure line of the shield tunnel 103 Lay the ring pipe. This method is widely used due to its simple process, but this ...

AI Technical Summary

Problems solved by technology

[0004] At present, the reinforcement methods of the receiving end of the shield mainly include rotary spraying reinforcement, stirring reinforcement, sleeve valve pipe grouting reinforcement, freezing reinforcement and adding a plain concrete joint reinforcement. Working outside the head well, even so, collapse, water leakage, mud leakage, slurry leakage and other phenomena are extremely prone to occur during the tunneling process of the shield tunnel. The construction risk is huge, and it also causes the shield tunnel in the receiving section to be misplaced, damaged and water seepage

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