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劲性砂桩是一种新型复合材料桩。基于弹性半无限空间的Mindlin位移解及复合材料力学原理,对劲性砂桩中混凝土芯桩轴向应力分布进行理论分析研究,得到劲性砂石桩芯桩轴力分布函数,讨论了不同荷载、混凝土芯桩标号、砂土弹性模量情况下芯桩轴向应力分布规律,并与现场芯桩轴向应力测试结果进行对比分析。研究表明:该理论分析结果与现场试验所显示的规律基本一致,验证了理论研究的合理性。该研究对于了解劲性砂桩的荷载传递规律和工作机制具有一定的理论价值。
Strong sand pile is a new type of composite material pile. Based on Mindlin displacement solution in elastic semi-infinite space and mechanics of composite materials, the axial stress distribution of concrete core pile in a rigid sand pile is theoretically analyzed and studied. The axial force distribution function of the pile is established. The influences of different loads, Concrete core pile marking, axial stress distribution of core pile under the condition of elastic modulus of sand and sand, and compared with the axial stress test results of core pile. The results show that the results of theoretical analysis are in good agreement with those of field tests, which proves the rationality of theoretical research. This study has certain theoretical value for understanding the load transfer law and working mechanism of the stiff sand pile.