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对三个不同地点的带帽刚性桩复合地基工程进行试验监测,根据试验监测数据结果进行分析,可见褥垫层不同厚度对带帽刚性桩承载力和沉降变形的影响:设计褥垫层在某一合适的厚度,能有效降低桩身承载力,提高桩间土的承载力,使桩和桩间土合理共同承担荷载,降低复合地基沉降变形,减少地基对基础的应力集中,对工程实际有一定的指导意义.在试验分析的基础上,理论研究刚性桩带帽的条件,在褥垫层合适厚度下,单桩承载力、桩间土承载力、桩间土折减系数对刚性桩带帽都有影响,当条件符合时设置刚性桩带帽可以提高复合地基承载力,降低沉降变形.
The test and monitoring of the rigid foundation pile composite foundation with hooded cap at three different locations are carried out. According to the results of the monitoring data, the influence of the different thickness of the cushion layer on the bearing capacity and settlement of the rigid cap pile with cap is shown as follows: A suitable thickness can effectively reduce the bearing capacity of piles and increase the bearing capacity of soil between piles so that the loads between piles and piles can be reasonably shared, reduce the settlement deformation of composite foundation and reduce the stress concentration of foundations to the foundation. It is of guiding significance.On the basis of experimental analysis, the theoretical study of the rigid pile cap conditions, under the appropriate thickness of the cushion, single pile bearing capacity, soil bearing capacity between piles, Caps have an impact, when the conditions are met, the rigid pile cap can improve the bearing capacity of composite foundation and reduce settlement deformation.