期刊论文

Temporal and Spatial Evolution of Slope Stability on the Right Side of a Viaduct on the Guisan Expressway

中文

地质与勘探

0495-5331

2019

55

5

1294-1301

10.12134/j.dzykt.2019.05.017

国家自然科学基金资助项目(编号:51678073,51508042) 湖南省自然科学基金项目(编号:2015JJ6004)联合资助。

本校为第一机构

以桂三高速公路高架桥右侧边坡工程为依托,研究开挖过程中碎石土高边坡的稳定性时空演变规律,对该边坡岩土体表面位移、深部位移、桩基承台变形及地下水位的变化进行长期监测,并利用FLAC3D软件对该边坡进行稳定性数值对比分析。结果表明:降雨引起地下水位抬升,导致边坡坡脚处体积含水率逐渐升高,孔隙水压逐渐上升,基质吸力逐渐减小,稳定性逐渐降低;在监测期内,边坡地表累计沉降位移前期变化较大,中期呈现起伏状态,最终趋于稳定数值;抗滑桩累积沉降位移变形为先增大后减小,最终逐渐稳定;水位孔高程随时间变化呈先递减后增加的状态,最终趋于平缓;同时,测斜孔监测结果反映边坡深部12m处曾产生一定变...

The purpose of this work is to study the temporal and spatial evolution of slope stability during excavation on the right side of a viaduct on the Guisan Expressway. It was based on long - term monitoring to surface displacement, deep displacement, deformation of pile foundation and change of groundwater level. And FLAC3D software was used to analyze the stability of the slope. Results show that the groundwater level rose by rainfall, leading to the increase of volumetric water content at the foot of the slope, while the pore water pressure gradually increased and the matrix suction decreases,...