桩基施工时侧向土压力增量的估算方法  

A New Method to Estimate the Increment of Lateral Soil Pressure Caused by Pile Construction

作　　者：唐世栋[1] 

机构地区：[1]同济大学地下建筑与工程系,上海200092

出　　处：《工程勘察》2006年第12期24-26,35,共4页Geotechnical Investigation & Surveying

摘　　要：通过对桩基施工过程中实测资料的分析,认为沉桩时土体中产生的侧压力增量不仅与水平距离有关,也与上覆土压力有关。通过理论推导提出了在土的极限平衡条件下结合小孔扩张理论估算单桩桩侧土压力增量的方法。由于该方法仅涉及到一些常用的土体参数,大大方便了工程计算。计算结果与实测资料对比,结果令人满意。By analyzing the test results from the construction of pile foundation, it is indicated that the increment of lateral soil pressure caused by pile construction overlying soil pressure. A new method is proposed is related not only to the horizontal distance, but also to the to estimate the increment of the lateral pressure around the installing pile by combining the theory of cavity expansion with the limit equilibrium method. Since the said method only involves some commonly used geotechnical parameters, it facilitates the engineering calculation greatly, and the comparison between the calculated results and the field results is satisfactory.

关 键 词：桩 侧压力增量 极限平衡理论 小孔扩张理论 

分 类 号：TU473.1[建筑科学—结构工程]