谷间软弱土路基稳定性计算方法研究  

Study of Calculation Method of Subgrade Stability in Valley Soft Soil

作　　者：周颖[1,2] 洪宝宁[1,2] 刘鑫[1,2] 甘亮琴 濮仕坤[1,2,3] Zhou Ying Hong Baoning Liu Xin Gan Liangqin Pu shikun(Key Laboratory of Ministry of Education for Geomechanics ＆ Embankment Engineering, Hohai Univ. , Nanjing 210098, China Geotechnical Research Institute, Hohai Univ. , Nanjing 210098, China PLA University of Science and Technology, Nanjing 210007, China)

机构地区：[1]河海大学岩土力学与堤坝工程教育部重点实验室,南京210098 [2]河海大学岩土工程科学研究所,南京210098 [3]解放军理工大学,南京210007

出　　处：《三峡大学学报（自然科学版）》2017年第3期58-61,共4页Journal of China Three Gorges University：Natural Sciences

基　　金：广东省交通运输厅科技项目<基于稳定性控制的山丘地区软弱路基优化处理方法研究>(科技-2015-02-015);国家自然科学基金青年基金(51609071);江苏省自然科学基金青年基金(BK20140848)

摘　　要：山区谷间路基的稳定性计算,目前仍沿用传统极限平衡的方法,未考虑山谷对路基的约束及谷间软弱土对路基稳定性的影响.依据谷间锅底状软弱土层存在形式,以及邻近山体等对路基稳定性约束的影响,确定了谷间软弱土路基稳定性的特征性描述参数以及修正系数计算方案,并得到了在山体与坡脚的距离和不同软弱土形式下的路基稳定性修正系数计算公式.通过工况对比,发现计算结果与采用本文中提出的稳定性修正系数计算出的安全系数两者相近,论证了本文提出的稳定性修正系数计算公式的可行性.The calculation of the stability of valley subgrade in mountain area is still using the method of traditional limit flatness without considering the effect of valleys on subgrade and the stability of valley soft soil. Based on the existence of the soft soil layer between the bottom of the pot and the effect of the adjacent moun- tain on the stability of the subgrade, the characterization parameters of the stability of the soft soil subgrade in the valley and the calculation formula of the correction coefficient are determined. The calculation formula of the correction coefficient of subgrade stability under different soft soils is obtained. By comparison of the working conditions, it is found that the calculated results are close to those calculated by using the stability correction coefficient proposed in this paper, so as to verify the feasibility of the stability correction coefficient calculation formula.

关 键 词：软弱土 稳定性 特征性描述参数 有限元 修正系数 

分 类 号：TU470.3[建筑科学—结构工程]