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PHC桩复合地基是一种有效的深厚软土地基加固处理方法。目前对PHC桩复合地基沉降尚未形成比较成熟的计算理论和方法,以京沪高速铁路济南西站为依托,分析了常规复合地基沉降计算方法在PHC桩复合地基沉降计算方面存在的问题,提出了Boussinesq-Mindlin联合求解附加应力的方法,再联合分层总和法计算PHC桩复合地基的沉降,计算结果与现场实测结果较为接近。
PHC pile composite foundation is an effective method of deep soft soil reinforcement. At present, the calculation theory and method of PHC pile composite foundation settlement have not been established yet. Based on the Jinan-Beijing Railway Station of Beijing-Shanghai high-speed railway, the problems existing in the settlement calculation of composite foundation with conventional composite foundation are analyzed. Boussinesq-Mindlin method to solve the additional stress, combined with stratified sum method to calculate the settlement of PHC pile composite foundation, the calculated results are close to the field measured results.