论文部分内容阅读
按照盾构施工引起的地层扰动机理及变形特点,将盾构施工对周围地层的扰动过程分为5个阶段,即:盾构机到达之前土仓压力影响阶段、盾构机通过阶段、管片衬砌脱出盾构机盾尾阶段、管片壁后浆液硬化阶段以及扰动土层的蠕变固结阶段,对盾构隧道施工各个阶段的地面沉降、土压力及孔隙水压力的变化过程进行监测,并分析其各自的变化特点。针对盾构施工过程的5个阶段的施工扰动特点,探讨各阶段相应的施工扰动控制要点。
According to the stratum disturbance mechanism and deformation characteristics caused by shield construction, the disturbance process of shield construction to the surrounding strata is divided into five stages, that is, the stage of influence of soil pressure before the shield machine arrives, the shield machine passes the stage, The shield shield tunneling at the end of shield tunneling, the slurry hardening at pipe wall and the creep consolidation phase of disturbed soil layer, the changes of ground subsidence, earth pressure and pore water pressure at various stages of shield tunnel construction are monitored, And analyze their own changing characteristics. According to the characteristics of construction disturbance in five stages of shield construction process, the corresponding control points of construction disturbance are discussed.