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深圳后海地区基岩为花岗岩,受地质构造影响风化极不均匀,各风化层厚度及埋深相差较大,给工程桩选型及施工造成很大困扰。尤其采用以强风化为桩端持力层的端承–摩擦型桩,单桩竖向抗压承载力特征值差异较大。结合该区2项基础桩工程实例,对22根桩的单桩竖向承载力静载试验结果进行分析,试图找出单桩竖向承载力的特性规律,为该区其他工程基础桩设计和施工提供参考。
The bedrock in the Houhai area of Shenzhen is granite, which is extremely unevenly weathered by the geological structure. The thickness and depth of each weathered layer are quite different, which causes great troubles to the selection and construction of engineering piles. In particular, bearing-friction-type piles, which are strongly weathered as pile-end bearing layers, have large differences in the characteristic values of vertical compressive bearing capacity of single pile. Combined with two examples of foundation piles in this area, the static load test results of 22 single piles under vertical load are analyzed to try to find out the characteristics of vertical bearing capacity of single pile, Construction for reference.