Small-section water conservancy tunnel TBM tunneling sedimentation and water burst section treatment method

Abstract

The invention discloses a small-section water conservancy tunnel TBM tunneling sedimentation and water burst section treatment method. The method comprises the following steps that (1) sedimentation and water burst sections are detected through advanced geological forecast; (2) performing spray protection and closed construction on surrounding rocks around the sedimentation and water gushing sections; (3) grouting reinforcement is conducted on the surrounding rock of the sedimentation and water gushing sections; (4) after the grouting reinforcement is completed, an excavation sampling method is adopted for checking the reinforcement effect; and (5) tunneling of the TBM is recovered. The method has the advantages of being convenient to construct and high in safety, settlement and water gushing sections can be rapidly detected through the method, the settlement and water gushing sections are more stable through the spraying protection and the grouting reinforcement, TBM tunneling and the settlement section and water gushing section passing are guaranteed, cutter head shutdown and mechanical damage are avoided, the construction efficiency is improved, the construction time is shortened, and the construction cost is reduced.

Description

technical field [0001] The invention relates to a tunnel construction method, in particular to a small-section water conservancy tunnel TBM excavation settlement and water gushing treatment method. Background technique [0002] With the rapid development of national economy and science and technology, a large number of various types of tunnel projects are built all over the country, and TBM tunneling technology, as a new type of tunneling technology, has the advantages of high efficiency and fast tunneling, good quality of hole formation, safety and environmental protection, etc. Various tunnel construction sites shine. [0003] The core of TBM excavation technology is the tunnel boring machine (so-called TBM), a new type of construction machine used to excavate tunnels under various geological conditions. According to the specific structure, it can be divided into open TBM, single shield TBM and double shield TBM. The outstanding advantage of using TBM for tunnel excavati...

AI Technical Summary

Problems solved by technology

However, due to the poor adaptability of TBM machinery to geological conditions, when it encounters adverse geological phenomena such as settlement, water gushing, and landslides during the excavation process, it often affects the speed and efficiency of tunnel excavation. In severe cases, it may cause TBM shutdown or failure. Mechanical damage, even lead to safety accidents on site

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