An open-type tbm steel tile installation and support system and method

Abstract

The invention discloses an open-type TBM steel tile installation support system and method. The system comprises a shield (1), a main girder (2) located in the shield (1), and a steel arch frame (3) arranged on a tunnel wall; a plurality of bracket systems (4) are arranged on the inner side of the shield (1) in an annular mode at equal internals, the bracket systems (4) are provided with steel tiles (5), and a steel tile support system connected with the main girder (2) is arranged between the main girder (2) and the bracket systems (4). Through the adoption of the open-type TBM steel tile installation support system and method, effective and continuous support can be carried out through the steel arch frame and the steel tiles, the damage caused by collapse of rock to equipment and personnel is prevented, and the construction safety is improved.

Description

technical field [0001] The invention relates to an open type TBM steel tile installation and support system and method. Background technique [0002] At present, an important technical problem that restricts the construction progress and safety of open TBM tunnels is that when encountering unfavorable geology such as fault fracture zones and alteration zones, once the TBM shield is exposed during excavation, a large number of collapses will occur. Gravel and quicksand not only pose a threat to the safety of TBM equipment and operators, but also a large amount of collapsed gravel accumulates at the bottom of the cave, which greatly increases the amount of slag removal at the bottom of the cave, often causing the TBM to shut down and wait for the slag to be cleaned before digging. The utilization rate of TBM equipment is reduced, the construction quality is affected, construction safety problems are brought, and construction costs are increased. The main reason for the analys...

AI Technical Summary

Problems solved by technology

[0002] At present, an important technical problem that restricts the construction progress and safety of open TBM tunnels is that when encountering unfavorable geology such as fault fracture zones and alteration zones, once the TBM shield is exposed during excavation, a large number of collapses will occur. Gravel and quicksand not only pose a threat to the safety of TBM equipment and operators, but also a large amount of collapsed gravel accumulates at the bottom of the cave, which greatly increases the amount of slag removal at the bottom of the cave, often causing the TBM to shut down and wait for the slag to be cleaned before digging. It reduces the utilization rate of TBM equipment, affects the construction quality, and also brings construction safety problems, which increases the construction cost

The main reason for the analysis is that there are defects in the support method of open TBM construction in the past, that is, when the fault fracture zone or alteration zone and other unfavorable geology are encountered during construction, the support methods adopted are steel arch frame, steel mesh, steel bar row and anchor rod The support cannot be continuously and effectively supported. When the TBM is digging forward, there is a discontinuity between the TBM shield and the surrounding rock, and the broken surrounding rock that has just exposed the shield cannot be closed continuously and effectively in time only by the reinforcement row, causing the gravel to fall, and It is also difficult to install the steel bar row if the distance between the arch frame is too small

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