【摘要】 CFG桩网复合地基广泛应用于处理软土地基。采用土工离心模型试验研究某码头堆场超大荷载下CFG桩网复合地基的变形和桩土应力特性，试验模拟了地基、CFG桩、树根桩、加筋垫层、防尘网和轨道梁基础、矿石堆载等，分析了超大荷载作用下复合地基表面变形、孔隙水压力、桩顶轴力、桩土应力比的变化规律。试验结果表明，复合地基的沉降速率在稳定控制标准之内，沉降量满足堆场使用要求，防尘网基础和轨道梁基础水平位移和沉降均很小，桩土应力比20～36。典型区CFG桩网复合地基在350 kPa荷载作用下是稳定安全的，达到了预期加固效果。更多还原

【Abstract】 CFG pile-net composite foundation is widely used to reinforce soft soil foundation. Geotechnical centrifuge model test was carried out to study the deformation and pile-soil stress characteristics of CFG pile-net composite foundation under super large load in the storage yard of a wharf. The foundation, CFG piles, root piles, reinforced cushions, dust nets, track beam foundation and ore loads are simulated. The variation laws of the surface deformations, pore water pressures and loads at the top of the CFG piles and the pile-soil stress ratio of the composite foundation are analyzed under super-large loads. The settlement rate of the composite foundation is within the stability control standard, and the settlement meets the requirements of the storage yard. The horizontal displacements and settlements of the dust net foundation and the track beam foundation are small. The pile-soil stress ratio is 20～36. The test results show that the CFG pile-net composite foundation in the typical zone is stable and safe under the load of 350 kPa, and the foundation reinforcement has achieved the expected effects.更多还原