摘要
三峡库区的老房子滑坡位于奉节县新城核心地段，滑坡体表面积9．71×10^4m^2，堆积厚度42～60m，体积约480×10^4m^3，保证边坡稳定性有重要的意义。三峡水库蓄水后在老房子滑坡部位将会形成较大的地下水压力，特别是在库水位骤降情况下，坡体内将产生较大的动水压力，这对边坡稳定是非常不利的。通过数值模拟不同工况边坡地下水渗流场可知，库水位从175m骤降至145m时，老房子滑坡所受动水压力为正常蓄水位时的6．2倍，进行稳定计算时必须考虑动水压力的影响。
The Laofangzi landslide lies in the center area of Fengjie country new town, the surface area of landslide body is 9.71×10^4m^2, the piled thickness is 42 - 60m and the volume is about 480×10^4m^3, it is important to ensure the stability of slope. After the storage of the Three Gorges reservoir, the landslide body will encounter bigger groundwater pressure, especially under the circumstance of the sudden lowering of water level, dynamic hydraulic pressure will be induced in the landslide body, which is very bad to the stability of the slope. According to simulation of the groundwater seepage field under many cases, when the water level suddenly lowes from 175m to 145m, the dynamic hydraulic pressure on the landslide body is 6.2 times as that of normal water level, so the affection of dynamic hydraulic pressure must be considered in the calculation of stability. The seepage field, after the lowering of groundwater table, is simulated to provide the scientific gist for the design of treatment project.
出处
《勘察科学技术》
2008年第6期42-45,58,共5页
Site Investigation Science and Technology
关键词
边坡
动水压力
骤降
稳定性
slope
dynamic hydraulic pressure
sudden lowering
stability
