护壁结构对人工挖孔桩的竖向承载力贡献研究  

Study on Contribution of Segmented Protection Wall to Vertical Bearing Capacity of Manual Digging Pile

作　　者：余海见[1] 韩彦丰[1] 罗丽娟[2] 黄伟[3] 

机构地区：[1]中交第一航务工程勘察设计院有限公司,天津300222 [2]长安大学建筑工程学院,西安710061 [3]重庆大学土木工程学院,重庆400045

出　　处：《地下空间与工程学报》2013年第4期771-776,824,共7页Chinese Journal of Underground Space and Engineering

基　　金：国家自然科学基金(NO.40872185);中央高校基本科研业务费专项资金资助(NO.CHD2010JC129)

摘　　要：为了研究人工挖孔桩的分段式护壁结构对桩竖向承载力的贡献,探索护壁结构对桩竖向承载力贡献度的统一量化计算公式。通过有限元软件ANSYS建立有无护壁结构这两种工况下的人工挖孔桩与岩土介质相互作用的三维计算模型并计算分析。得出结果表明:在所给参数条件下,按承载力控制时分段式护壁结构对桩竖向承载力的贡献可以达到20.0%;并提出按承载力控制时分段式护壁对桩竖向承载力贡献度的统一量化计算公式,具有一定的参考意义。In order to study the contribution of the protection wall of manual digging pile to the vertical bearing capacity of the pile, we explored unified quantitative formulas of numeration about contribution of segmented retaining wall to the vertical bearing capacity of the manual digging pile. Besides, we used finite element programs ANSYS to construct a three-dimensional interaction numerical model between the manual digging pile and soil medium with or without supporting wall, then calculation and analysis were carried out. The results show that under the given parameters of this article, the contribution of segmented retaining wall to the vertical bearing capacity of the pile according to bearing capacity control reached 20% ;the unified quantitative formulas has been proposed about contribution of segmented retaining wall to vertical bearing capacity of the pile according to bearing capacity control, which has some reference significance.

关 键 词：人工挖孔桩 护壁结构 数值模拟 贡献度 量化公式 

分 类 号：TU473.1[建筑科学—结构工程]