考虑圆拱效应的桩孔最大自立深度
Maximum self supporting depth of pile hole considering the effect of circular arch
黄博杰 1曹永红 1华建民 1康明1
作者信息
- 1. 重庆大学土木工程学院,重庆400045
- 折叠
摘要
对土体稳定性的分析计算大都采用基于二维理论推导出的公式,为解决其无法考虑在空间环境下桩孔圆拱效应的问题,基于别氏理论和挡土墙原理,考虑土体圆拱效应以及孔径对孔壁稳定性的影响,提出计算孔壁自立稳定最大孔深的计算模型;根据别氏公式解并借助MATLAB数值分析软件,对模型中的相关系数进行多次调整,最终提出了简化计算公式,对比分析了计算公式与别氏公式解,结果证明该公式能较好地近似计算别氏理论解,且形式较别氏公式简洁.
Abstract
Most of the analysis and calculation of soil stability is based on the formula from the two-dimensional theory,in order to solve the problem that it cannot take into account the effect of the pile hole circular arch in the space project Based on B.Γ.theory and the principle of retaining wall,considering the soil arch effect on the stability of the hole wall,a calculation model for calculating the maximum hole depth of self-supporting hole wall was put forward.According to different formula solutions and the MATLAB numerical analysis software,the correlation coefficient in the model was adjusted several times.Finally a simplified calculation formula was proposed,the calculation formula and B.Γ.formula solution were contrasted and analyzed.The result shows that this formula can calculate B.Γ.theoretical solution for better approximation,which is more concise than the B.Γ.formula,beneficial to the popularization and application,and more convenient for application in practical engineering.
关键词
孔壁稳定性/圆拱效应/挡土墙原理/简化模型Key words
borehole stability/circular arch effect/principle of retaining wall/computational model引用本文复制引用
出版年
2018
NETL
NSTL
维普
万方数据