矩形顶管穿路施工对土体扰动变形研究与实测分析

Research and Analysis of Soil Deformation Caused by Construction of Rectangular Pipe Jacking

针对矩形顶管施工对土体扰动的不利影响问题,基于土力学理论,给出了矩形顶管施工扰动下的地层间隙参数及地层损失比解析计算式,并对矩形顶管施工引起的土体变形进行建模分析,依据半空间弹性假设及复变函数共形映射理论,通过共形映射将矩形顶管问题转换为圆形顶管问题,进而给出了矩形顶管施工引起土体变形近似解析计算式,依托某市综合管廊矩形顶管穿越工程,结合相关现场监测数据,对本文理论进行验证分析,依据本文理论计算矩形顶管施工扰动下的地层损失比为6.9%、地表沉降计算值147mm,其中沉降计算值稍偏大,认为其原因主要为施工中注浆加固对沉降控制的有利影响,可为相关工程的设计与研究提供参考。

Based on the theory of soil mechanics,the parameters of the formation gap and the loss ratio under the disturbance of the construction of the rectangular pipe are deduced and analyzed,and the deformation of the soil caused by the construction of the rectangular pipe is performed. Based on the assumption of semi-space elasticity theory and the conformal mapping theory of complex functions,the model analysis and analysis provide an approximate analytic formula for the deformation of soil caused by rectangular pipe jacking,and rely on a city's integrated pipe corridor rectangular pipe-jacking project,combined with related sites. Based on the monitoring data,the theory of this paper was verified and analyzed. According to the theoretical calculation of this paper,the loss ratio of the formation under the disturbance of rectangular pipe jacking was 6. 9%,and the calculated value of surface settlement was 147 mm. The calculated value of the settlement was slightly larger,and it was considered that the reason was mainly the construction note.