水利水电技术2018，Vol.49Issue(1)：136-142,7.DOI:10.13928/j.cnki.wrahe.2018.01.020
基于叠梁模型的反倾层状岩体地基坡顶极限承载力计算方法研究
Laminated beam model-based study on calculation method for ultimate bearing capacity of slope crest of anti-dip stratified rock foundation
摘要
Abstract
In order to study the ultimate bearing capacity of the slope crest of anti-dip stratified rock foundation,a kind of laminated beam model for the anti-dip stratified rock foundation is established for analyzing its stress situation in accordance with the relevant theories of both the mechanics of materials and the structural mechanics,and then the calculation formula for the ultimate bearing capacity of the slope crest of anti-dip stratified rock foundation is deduced as well.Within the model,each rock layer is regarded as a beam,while the whole rock mass is regarded as an integrated body,thus the bearing capacity of the rock mass is calculated with the stress calculation formula for beam;moreover,basic assumptions are made for the laminated beam model for distinguishing both the intersection between rock layer and slope crest plane and the intersection between rock layer and slope plane,and then carrying out both the stress analysis and the formula deduction for the overall situation and the special situation.The result shows that the laminated beam model established herein can correctly reflect the stress status of the anti-dip stratified rock foundation.The formula deduced from this model is a new method for calculating the ultimate bearing capacity of rock foundation and its physical significance is definite.It is demonstrated through the relevant calculation case that the method can rapidly and accurately determine the stability of the anti-dip stratified rock foundation and obtain the corresponding value of the ultimate bearing capacity of the foundation.The study result can provide reference for calculating the slope crest ultimate bearing capacity of the relatively homogeneous stratified rock foundation.关键词
叠梁模型/层状岩体地基/坡顶/极限承载力/计算公式Key words
laminated beam model/stratified rock foundation/slope crest/ultimate bearing capacity/calculation formula分类
土木建筑引用本文复制引用
李永辉,邢锋,浦少云,肖立福..基于叠梁模型的反倾层状岩体地基坡顶极限承载力计算方法研究[J].水利水电技术,2018,49(1):136-142,7.基金项目
国家自然科学基金项目(51168009) （51168009）
