复合地基中无粘性桩周土颗粒位移形式  

Displacement mode of granule of cohesionless soil around pile in composite foundation

作　　者：蒋红英[1] 鲁进步[2] 惠富春[3] 

机构地区：[1]兰州理工大学土木工程学院,甘肃兰州730050 [2]兰州理工大学技术工程学院,甘肃兰州730050 [3]兰州理工大学理学院,甘肃兰州730050

出　　处：《兰州理工大学学报》2005年第2期112-115,共4页Journal of Lanzhou University of Technology

基　　金：甘肃省自然科学基金(ZS022 A25 15)

摘　　要：基于无序颗粒堆中应力传递的试验研究,用扩散过程理论微观分析挤密桩的桩周土颗粒介质在径向挤压力的作用下,塑性区内土体静力结构的应力分布、土颗粒的位移形式及其扩散规律,并用概率模型定性地描述了无粘性土复合地基的挤密过程中土颗粒的位移,得到了在r≤d2、d2≤r≤rs、r≥rs3 个不同范围内,土颗粒径向位移的概率分布模型.According to experimental investigation of stress transfer within a model system of disordered grains and using the theory of diffusion process,the stress distribution,displacement mode of soil granule and its diffusion pattern in static soil structure were analyzed miceroscopically when the granule medium of the soil around compacted pile is subjected to radial compression in a plastic condition.Probability model was used to discribe qualitatively the displacement of soil granule during the process of compaction of composite foundation of cohesionless soil.The probability distribution of radial displacement of soil granule was discussed for different radial ranges r≤d2,d2≤r≤r_s,and r≥r_s,respectively.

关 键 词：土颗粒 桩周土 径向 应力分布 

分 类 号：TU444[建筑科学—岩土工程]