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对上海软土地区堆填土大型现场试验进行研究,监测不同填土阶段地面的沉降、填土对临近PHC管桩的桩身水平位移和水平推力的影响,研究了填土的高度同桩身位移、桩身水平土压力、地层等相互影响关系,得出填土对桩基的负摩阻力、水平力的影响距离以及主要影响土层。得出填土高度和软弱土层厚度影响临近建筑桩基础的安全距离。针对填土对邻近建筑物基础影响的不同特点,通过两个不同的地基处理工程实例监测,妥善地解决了软土地区填土对临近建筑物基础的附加沉降及桩基水平推力的影响。
The study of large-scale on-site tests of landfill in Shanghai soft soil area, monitoring the settlement of the ground in different filling stages, the effect of filling on the horizontal displacement and horizontal thrust of pile adjacent to PHC pipe pile, Displacement, the level of soil pressure on the pile, strata and so on. The relationship between the negative frictional resistance of pile foundation and horizontal force and the main influence on soil layer are obtained. It is concluded that the height of fill and the thickness of soft soil affect the safety distance of pile foundation near the building. In view of the different characteristics of filling on the adjacent building foundation, two different foundation treatment project monitoring, properly solve the impact of soft soil area on the additional settlement of the adjacent building foundation and pile horizontal thrust.