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.
出处
《地下空间与工程学报》
CSCD
北大核心
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)
关键词
人工挖孔桩
护壁结构
数值模拟
贡献度
量化公式
manual digging pile
protection wall structure
numerical simulation
contribution
quantitative formula
