论文部分内容阅读
依托穗莞深城际轨道太平隧道工程,在其侧穿一多层房屋时,采用控制地层损失与旋喷桩加固土体相结合的方式,很好地保护了现有房屋的安全与正常使用状态。通过分析隧道穿越过程中房屋的实测变形规律,并进行有限元数值分析,比较了有无旋喷桩和地层损失率对土体垂直位移、房屋角点沉降、房屋整体倾斜、土体深层水平位移的变化规律。分析结果表明,设置旋喷桩和控制地层损失均能有效减小沉降和土体位移,但控制地层损失的效果远比设置旋喷桩要明显。随着地层损失的增大,土体水平位移曲线由“勺”型渐变至S型,最大水平位移位置逐渐上移且位于隧道的上边界附近。
Relying on Suiwan deep inter-city track Taiping tunnel project, in its side wear a multi-storey house, the use of control formation loss and rotary jet grouting reinforcement of soil combined with a very good protection of the existing housing security and normal use status. By analyzing the measured deformation laws of the houses during tunneling process and analyzing the finite element method, the effects of the jetting pile and formation loss rate on the vertical displacement of soil, corner settlement of houses, overall tilt of houses, horizontal displacement of deep soil The law of change. The analysis results show that both the setting of jet grouting pile and the control of formation loss can effectively reduce the settlement and soil displacement, but the effect of controlling formation loss is much more significant than that of setting jet grouting pile. With the increase of formation loss, the horizontal displacement curve of soil gradually changes from “scoop” to S, and the maximum horizontal displacement gradually moves upward and is located near the upper boundary of the tunnel.