摘要
顶管法在各个城市的地下管线施工中广泛运用,尤其在已建道路下的管线施工中具有优势。顶管穿越路基施工引起管道周围土体变形易对路面造成变形破坏。结合实际工程,分析计算顶管施工正面附加推力、设备与周围土体的摩擦力对地表垂直变形的影响,结合土体损失引起的竖向变形,计算顶管施工引起总的周边地表竖向变形。计算结果与实际监测结果吻合,顶管施工引起周边地表竖向变形呈现前方隆起后方沉降的变化规律。
Pipe jacking has been widely used in the underground pipeline construction, especially in the pipeline construction of road engineering. When pipeline passing through the roadbed, the deformation of soil may be so large that destroy the road surface. According to a certain practical engineering, this paper calculated the soil vertical deformation induced by bulkhead additive thrust and the force of friction between jacking device and soil. Combining the formula of ground deformation induced by ground loss, the formula of total soil vertical deformation induced by pipe jacking construction is obtained. The calculated results agrees well with the actual monitoring results, due to pipe jacking construction, the frontal soil of excavation face heave and the rear soil subside.
作者
苏越
张敏
李更召
张成君
邢卫民
SU Yue;ZHANG Min;LI Gengzhao;ZHANG Chengjun;XING Weimin(Tianjin Institute of Geotechnical Investigation and Surveying,Tianjin 300191,China)
出处
《水利与建筑工程学报》
2019年第3期208-211,230,共5页
Journal of Water Resources and Architectural Engineering
关键词
顶管
地表竖向变形
正面附加推力
摩擦力
土体损失
pipe jacking
soil vertical deformation
bulkhead additive thrust
force of friction
ground loss
