桩–土–桩相互作用影响的试验研究

Tests on influence of pile-soil-pile interaction

通过大比例尺模型试验、工程实测结果与弹性理论解进行对比,指出弹性理论解夸大了桩–桩、桩–土、土–土相互作用影响,造成沉降计算值偏大和过高估计桩顶反力的不均匀性和筏底地基土反力的不均匀性。据此,建议进行上部结构–基础–桩土共同作用的分析计算时,必须充分估计弹性理论解与真实值的差别,以工程实测和试验数据为基础对弹性理论解进行修正,方可获得较满意的计算结果。

It was pointed out through large scale model tests and a comparison between the measured results and the theoretical solution of elasticity that the theoretical solution of elasticity exaggerated the influence of pile-pile, pile-soil, soil-soil interaction, and it led to the large predicted value of subsidence and overestimated the non-uniformity of the reaction on pile head and non-uniformity of the earth pressure on raft bottom. The difference between the theoretical solution of elasticity and the real value should be estimated in analysis of interaction of superstructure-foundation-soil, and the theorefical solution of elasticity should be revised based on the measured and model test results.