浅埋微型顶管隧道模型建立及分析

Construction and Analysis on Extra-shallow Pipe-jacking Model

浅埋微型隧道的覆盖土层对扰动变形十分敏感,对其研究主要停留在施工经验阶段,有必要从理论上对顶管施工引起的土体扰动和地表变形规律进行研究,以便估计施工对周围环境的影响及其危害的程度,从而采取有效的防治措施,避免施工病害发生。以重庆市主城区排水工程南滨路段顶管施工为例,对顶管施工引起的土体扰动和地面变形进行了数值模拟分析,得出不同厚度覆盖土层顶管施工引发的覆土层变形规律。

A harmful soil deformation of overlying soil disturbance by extra-shallow pipe jacking construction may lead to roadbed and pavement structural damage, and extra-shallow coverage of overlying soil deformation is sensitive to disturbance. It is therefore necessary to theoretically study the disturbance of soil and surface deformation, currently which main stay experience research in the construction stage, caused by pipe jacking. And then the impact on the surrounding environment and the danger level are estimated, in order to take effective preventive measures to avoid construction disease. Rased on Chongqing city drainage works dinning of pipe jacking, come to a different thickness of overlying soil pipe jacking induced deformation. The results on numerical simulation of the vertical soil disturbance and ground deformation by pipe jacking show deformation law under different thicknesses of overlying soil by pipe jacking.