基于土拱理论的两种桩型抗滑性能对比分析  

Comparative Analysis of Anti-sliding Performances Between Two Kinds of Piles Based on Soil Arch Theory

作　　者：王培勇[1,2] 董彤[1,2] 李秀地[1,2] 

机构地区：[1]后勤工程学院军事土木工程系,重庆401311 [2]后勤工程学院岩土力学与地质环境保护重庆市重点实验室,重庆401311

出　　处：《后勤工程学院学报》2016年第6期22-27,51,共7页Journal of Logistical Engineering University

基　　金：国家自然科学基金项目(51378496)

摘　　要：为避免由于相邻抗滑桩间土拱效应的存在,使得位于桩后三角形受压区的土体发生破坏,导致所设计的桩间距不能充分发挥抗滑桩作用,提出了一种不产生三角形受压区的截面形状为等腰三角形的抗滑桩。从土拱受力分析出发,并以桩间静力平衡条件、拱脚截面强度条件分别建立起矩形和三角形截面桩桩间距表达式。工程算例表明,三角形截面桩单位截面面积有效抗滑能力较强,在实际工程中可采用相对小间距的三角形截面桩,以提高整体经济效益。In order to avoid the existence of the soil arch effect between adjacent anti-slide piles, the triangular compressiveregion, which locates in the rear side of the pile body, tends to be failure; as a result, pile spacing design cannot give full play to therole of anti-slide piles. Anti-slide piles, of which the section shape is isosceles triangle, is put forward to ensure that the triangularcompression region is not produced. The spacing of anti-slide piles with rectangular and triangular cross section is given in the viewof stress analysis of soil arch, static equilibrium condition and strength condition of arch foot section. Finally, anti-slide capacity perunit sectional area of triangular piles is proved to be better than that of rectangular piles. For better economic benefits, rectangularanti-slide piles with relatively small spacing can be used in practical engineering.

关 键 词：抗滑桩 三角形 土拱效应 桩间距 

分 类 号：TU473.1[建筑科学—结构工程]