摘要
从刀盘扭矩的组成分析了盾构机刀盘被加固土体困住的原因。从处理过程的工况变化中,判断刀盘困住是由于经过刀盘磨削而成细粒粉状的水泥二次水化紧密充填刀盘侧面的建筑空隙,长时间停机固结后对刀盘侧面产生较大抗剪扭矩所致。基于抗剪扭矩采取解除刀盘侧面正上方加固土体约束、置换刀盘正前方加固土体和盾构边推出加固区边转刀盘等措施成功解决了刀盘被加固土困住的难题。所取得的工程经验与教训可为今后处理类似刀盘被困问题提供了工程参考意义。
The EPB shield cutter-head driving predicament induced by reinforced soil is analyzed. The seconda- ry hydration of cement from grinding by cutter-head to fill the gap on cutterhead side resulted in the great shearing strength torque. Based on shearing strength torque, three primary measures are adopted and the problem of cutter- head driving predicament is triumphantly solved. Three measures are unyoking the reinforced soil upon the side face of the eutterhead, permuting the front reinforced soil of the cutterhead and partial thrusting out the reinforced soil. The engineering experiences and lessons given in this paper are meaningful for solving similar cutter-head stranded problems.
出处
《地下空间与工程学报》
CSCD
北大核心
2014年第1期116-121,共6页
Chinese Journal of Underground Space and Engineering
