Treatment method for shield shell grouting wrappage of shield tunneling machine

Abstract

The invention discloses a treatment method for a shield shell grouting wrappage of a shield tunneling machine. The treatment method comprises the following steps that 1, the shield tunneling machine is stopped; 2, a geological drill conducts drilling and coring to determine the range of the grouting wrappage; 3, geological drill hole backfilling is conducted; 4, a down-the-hole drill hole positionis marked; 5, the grouting wrappage is removed; 6, down-the-hole drill hole backfilling is conducted; 7, whether the grouting wrappage is removed or not is judged; 8, holes are locally and densely distributed; 9, the step 5 to the step 7 are repeated; and 10, tunneling of the shield tunneling machine is recovered. According to the treatment method, the range of the grouting wrappage on the upperportion of a shield shell of the shield tunneling machine is confirmed through drilling and coring of the geological drill on the ground, damage to the shield shell of the shield tunneling machine canbe effectively reduced, and the risk of water burst and sand burst is avoided; the grouting wrappage is removed through drilling of a down-the-hole drill, the construction period can be effectively shortened, and the construction cost is saved; and whether the grouting wrappage on the upper portion of the shield shell is removed or not is judged through a ball valve, the removal quality of the shield shell grouting wrappage of the shield tunneling machine can be effectively guaranteed, and the tunneling posture of the shield tunneling machine is controllable.

Description

technical field [0001] The invention belongs to the technical field of shield tunneling construction, and in particular relates to a method for treating a shield casing grouting wrap of a shield tunneling machine. Background technique [0002] Simultaneous grouting in shield tunneling is an indispensable part of the shield construction process. In the process of shield tunneling, due to excessive synchronous grouting pressure, excessive grouting volume, and prolonged downtime, etc. The superposition causes the synchronous grouting mortar to form consolidation on the upper surface of the shield body, and the upper surface of the shield machine is wrapped with mortar, which leads to the uncontrollable driving attitude of the shield machine, the large thrust of the shield machine, the uncontrollable ground settlement, and the Problems such as damage appear. At present, the existing technology adopts the construction of the ground envelope above the shield machine to excavate th...

AI Technical Summary

Problems solved by technology

[0002] Synchronous grouting in shield tunneling is an essential part of the shield construction process, but during shield construction due to excessive synchronous grouting pressure, excessive grouting volume, and long-term shutdown Superimposed, the synchronous grouting mortar is consolidated on the upper surface of the shield body, and the upper surface of the shield machine is wrapped by mortar, resulting in uncontrollable tunneling posture of the shield machine, large thrust of the shield machine, uncontrollable ground subsidence, and segment Problems such as damage occur. At present, the existing technology is to excavate the shaft above the ground construction enclosure structure above the shield machine, and carry out the shield machine grouting package treatment technology in the shaft. Although the effect is remarkable, it has high requirements for the ground environment and the construction period Long and costly, which is not conducive to shield construction risk, construction period and cost control

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