邻近刚性桩复合地基支挡结构土压力计算

Calculation of Retaining Structure Soil Pressure of Adjacent Rigid Pile Composite Foundation

为了探讨刚性桩复合地基对邻近支挡结构土压力的影响,找出此复杂工况下支挡结构土压力的合理计算方法。基于刚性桩复合地基荷载传递机理,结合Mindlin解、Boussinesq解以及应力叠加原理,分析了考虑复合地基荷载传递效应的邻近支挡结构附加土压力简化弹性解法,确定了邻近刚性桩复合地基支挡结构土压力的计算方法,并将计算结果与模型试验结果进行了对比分析。结果表明,将复合地基对邻近支挡结构土压力的影响进行分部、分区域计算比较符合刚性桩复合地基的荷载传递机理,且用该方法计算的土压力和附加土压力与模型试验结果匹配性较好,并且较为安全。

In order to discuss the influence of rigid pile composite foundation on soil pressure of adjacent retaining structure,a reasonable calculation method of soil pressure of retaining structure under this complex working condition is found.Based on the load transfer mechanism of rigid pile composite foundation,combined with Mindlin solution,Boussinesq solution and stress superposition principle,the simplified elastic solution of additional earth pressure of adjacent retaining structure of composite foundation load transfer effect was analyzed,and the calculation method of earth pressure of adjacent retaining structure of rigid pile composite foundation was determined.The calculation results are compared with the model test results.The results show that the load transfer mechanism of rigid pile composite foundation can be well considered by subdivision and subregion calculation of the influence of composite foundation on the soil pressure of adjacent retaining structures,and the additional soil pressure and soil pressure calculated by this method are in good agreement with the model test results,and are safe.