静压单桩施工对道路影响的数值模拟研究  

Numerical simulation of influence of the construction of single jacked pile on road

作　　者：吕全乐[1] 鹿群[1,2] 郭少龙[1] 

机构地区：[1]天津城市建设学院土木工程学院,天津300384 [2]天津市软土特性与工程环境重点实验室,天津300384

出　　处：《广西大学学报（自然科学版）》2013年第1期182-187,共6页Journal of Guangxi University（Natural Science Edition）

基　　金：国家自然科学基金资助项目(40972170/DO214);天津市自然科学基金资助项目(09JCYBJC07800);天津市软土特性与工程环境重点实验室开放基金资助项目(2011SCEEKL005)

摘　　要：为了进一步认识静压桩施工对周边道路的不利影响,采用三维实体模型,综合考虑了桩、路面与土体的摩擦以及大变形、非线性等因素,使之更加符合实际工程,在无道路和存在5 m宽道路两种情况下,分别进行静力压桩数值模拟,分析了两种情况下土体位移的变化以及存在道路时路面板的位移及应力变化。得到结论:存在道路情况下,地表土体水平位移减小,而深部土体水平位移增大;有路情况下土体竖向位移较无路情况的发生了较大变化;路面板在近桩端下沉,远桩端上翘等。For better understanding the adverse effect of jacked pile construction on surrounding roads, 3D solid models was adopted and the friction between piles or pavements and soils as well as large deformation and nonlinearity were taken into account comprehensively, in accordance with the practical project. Under the conditions that there is no road or a 5m-wide road, numerical simulation and analysis were carried out respectively to calculate the soil displacement in the two cases and the displacement and stress of road slab. The results showed that when there was a road, the horizontal displacement of the soil at the surface decreased while the displacement of the soil in the deep in- creased, and the vertical displacement of soil increased as compared with no roads, and the pave- ments subsided at the near-end and upheaved at the far-end.

关 键 词：静压桩 挤土效应 地表隆起 水平位移 位移贯入法 

分 类 号：TU443[建筑科学—岩土工程]