Removing construction method for shield machine to reach tunnel door

Abstract

The invention provides a removing construction method for a shield machine to reach a tunnel door. The method comprises the following steps that S1, when the shield machine reaches a certain distancefrom the tunnel door, tunnelling is stopped, and a plurality of exploration holes are drilled at determined positions of the tunnel door; S2, inspection tubes with valves are inserted into the exploration holes and fixed, and the valves are opened to check water flow in the tunnel door; S3, a working platform is set up, piles in the tunnel door are cut in the horizontal direction at the tops of the piles until all the piles are cut, and the cutting depth of each pile is greater than half of the pile diameter; S4, the piles in the tunnel door are completely cut in the same cutting direction asstep S3 at the roots of the piles; S5, the shield machine tunnels forwards until the piles in the tunnel door are pushed out of the tunnel door, and concrete at the tops of pile holes are removed; S6,the piles are fixed to prevent the piles from moving, remaining steel bars at the tops of the piles are cut until complete cutting off, and the piles are transferred out of the tunnel door until allthe piles are transferred; and S7, after remaining slag soil in the tunnel door is removed, the shield machine reaches the tunnel door to carry out complete removing.

Description

technical field [0001] The invention relates to the technical field of building construction, in particular to a construction method for breaking a shield machine to reach a portal. Background technique [0002] The portal reached by the shield generally adopts the steel ring of the portal and the reinforced concrete bored pile structure, and the shield machine cannot directly pass through the pile foundation. Existing methods such as manual removal, mechanical removal, and wire saw cutting are used to chisel out the piles in the access door. [0003] Manual demolition requires personnel to completely remove the concrete of the pile directly at the wellhead and flame-cut the steel bars. Mechanical demolition requires an excavator to completely chisel the pile concrete directly at the wellhead and flame-cut the steel bars. At the wellhead, there is a large amount of muck to be cleaned in the later stage, which takes a long time and costs a lot. The wire saw cutting needs to ...

AI Technical Summary

Problems solved by technology

[0003] Manual demolition requires personnel to completely remove the concrete of the pile directly at the wellhead and flame-cut the steel bars, while mechanical demolition requires an excavator to completely chisel the pile concrete directly at the wellhead and flame-cut the steel bars. At the wellhead, there is a large amount of muck to be cleaned in the later stage, which takes a long time and costs a lot. The wire saw cutting needs to divide the hole door into several areas and the drilling volume is large. Each pile needs to be cut into multiple sections, and the cutting volume is large. , the process is more complicated and the cost is higher

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