Research on Anti-machine Stuck Technology for Open TBM Tunnel Crossing Fault Fractured Zone
TBM passing through fault fracture zone and other bad geology is prone to the risk of stuck machine,which seriously affects the construction progress and safety.This paper relies on the Daliangshan No.1 Tunnel project,and focuses on the adverse geological conditions of TBM passing through fault fracture zones,the mechanism of cutter head stuck,shield body stuck and cutter head shield body stuck are summarized respectively.Based on field investigation and measured data,the paper analyzes the site overview of cutter head stuck and change of driving parameters,and puts forward an effective pre-processing technology to prevent stuck.Based on finite element analysis,the optimal grouting reinforcement range is determined,and the extruding measures of TBM card machine are further proposed.Studies have shown that,when TBM is driven to the fault area,the cutter head torque increases,the thrust decreases,and the driving parameter changes intensify.Because advanced geological prediction can effectively detect bad formation information,so the effective measures should be taken in advance,such as grouting reinforcement,adaptive transformation of TBM,and enhancement of equipment configuration.
NETL
NSTL
万方数据
维普
