摘要
应用统一强度理论,对挤密桩的爆扩成孔和夯实两个阶段进行了塑性分析,得出了土体爆扩成孔塑性边界比例半径计算公式和土体夯填塑性影响比例半径计算公式。所得公式考虑了不同拉压比的影响和中间主应力的影响,可以合理地得出不同材料的相应解,它既适用于拉压强度相等的材料,也适用于拉压强度不相等的材料。这些公式可以适用于各种土体的爆扩塑性影响区的计算和夯实塑性影响区的计算,可以用于分析桩的爆扩是否造成邻桩已夯实的土体的破坏,可以用于分析夯实土体所需的重锤的能量,从而确定重锤的重量和夯击次数。
The plastic analysis of compacted pile under hole-blasting and tamping processes based on the unified strength theory is investigated. The effects of strength difference in tension and compression and the effects of intermediate principal stress are both considered. The formulae thus obtained are suitable for materials with different tension ＆ compression strengths as well as those with equal tension-compression strengths. The formulae can be used to predict soil plastic zone during hole-blasting and tamping processes. The deformation characteristics of nearby piles in hole-blasting process of one pile can be estimated based on the solution. Thus the weight of column hammer and tamping numbers can be decided.
出处
《工程力学》
EI
CSCD
北大核心
2006年第11期159-162,158,共5页
Engineering Mechanics
基金
陕西省自然科学基金资助项目(2005E204)
教育部博士点基金资助项目(20040710001)
关键词
结构工程
统一强度理论
地基
挤密桩
桩
structural engineering
unified strength theory
ground foundation
closely compacted pile
pile
