第34卷第3期 2017年5月
土木工程与管理学报 Journal of Civil Engineering and Management
黄土斜坡地基附加应力
李相斌，郭玉涛，蔡乔，李剑锋，吴晗，苗治峰
（中北大学理学院，山西太原030051）
Vol.34 No.3 May2017
摘要：针对黄土斜坡地基，围绕斜坡坡角、基础埋深、临坡距三个因素对斜坡地基附加应力的影响开展了系列探究试验。试验结果表明，斜坡坡角对斜坡地基附加应力影响巨大，坡角越大地基附加应力实测值与理论弹性解Boussinesq解差距越大，从而证明Boussinesq解不能直接用于斜坡地基附加应力计算，应给出相应的折减；小临坡距、大坡角的不同基础埋深试验表明，小临坡距、大坡角基础安全性及稳定性的提高不能依赖于增大基础埋深；关于临坡距的系列探究试验表明，临坡距越小，基础下方土体附加应力不对称性愈发凸出，而随着临坡距的增大，附加应力的不对称性得到明显缓解。为了基础择址不过于保守，同时满足安全性、稳定性的要求，应选择最优临坡距。
关键词：斜坡地基；地基附加应力；Boussinesq解；基础埋深；最优临坡距
中图分类号：TU444
文献标识码：A
文章编号：2095-0985(2017)03-0119-06
Additional Stress of Loess Slope Foundation
LI Xiang-bin, GUO Yu-tao, CAI Qiao,LI Jian-feng,WU Han, Miao Zhi-feng(School of Science, North University of China, Taiyuan 030051, China)
Abstract: Aiming at the loess slope foundation, focused on three factors, which are the slope angle, the foundation depth and the slope distance, we have carried out a series of research experiments on the influence of the additional stress of the slope foundation. The test results show that the slope angle has great influence on the additional stress of the slope foundation.The bigger the slope, the greater difference between measured value and Boussinesg solution on additional stress of loess slope foundation,which proves that Boussinesq solution can not be directly used for the calculation of slope foundation's additional stress, it should be given the corresponding reduction; Tests in small slope distance, large slope angle and different foundation depth show that the increase of foundation depth has nothing to do with the improvement of safety on small slope length foundation and small angle foundation; Series tests on the slope distance show that the smaller the slope distance is, the more asymmetric additional stress appears in the soil beneath the foundation, and with the increase of slope distance, the asymmetry of the additional stress relieved. In order to choose the basis of the foundation on condition that it is not too conservative, at the same time meets the safety and stability requirements,we should choose the best slope distance.
Key words: slope foundation; additional stress of foundation; Boussinesg solution ; depth of founda.
tion; best slope distance
当今城市用地目趋紧张，愈多建筑走向山区。在多山脉地区，古塔、寺庙地基安全性评估，山区民用建筑地基安全性、稳定性的计算，山区信号塔、高压电线塔基础的择址等，使得关于斜坡地基下附加应力的研究意义重大。从1885年法国力
收稿日期：2016-06-15修回日期：2016-11-03
学家Boussinesg提出Boussinesg弹性理论解，打开地基附加应力探索大门至今，已有众多学者对平面地基下的附加应力作了大量研究[1~5]，然而关于斜坡地基附加应力的研究甚少。目前国内对斜坡地基附加应力作了某些探究：谭瑞山[6运用
作者简防数据（1990-），男，湖北黄石人，硕士研究生，研究方向为岩土工程（Email:277940933@qq.com）