摘要
分析了基岩山区斜坡区域地下水的渗流模式,指出斜坡堆积体中地下水的一般特征,根据这个特征建立了条分法中斜坡渗透力的简易计算方法,用于改进传统的剩余推力法和Sarma法。该方法不需要额外补充参数,易于工程勘察人员掌握。提出通过极限状态考察斜坡安全储备的思路,对三峡库区某滑坡在水库蓄水前后的稳定性和安全储备进行了评价,结果表明传统方法计算的稳定性系数过高,当库水位快速下降时滑坡稳定性减弱,地下水渗透力是其中不可忽视的影响因素。
The regional flow pattern of groundwater in a slope area was analyzed and it is demonstrated that the groundwater in slope deposit are generally shallow and flow along the bed surface. On the basis of the analysis, a simple calculation method for seepage force of groundwater was developed to Slice method for modifying of conventional Nonequilibrium Propulsions method and Sarma's method. No additional parameters are demanded in application of the method and it is easy to be mastered for investigation engineers to evaluate the impact of seepage force for slope stability. It is indicated form an example that the stability of slopes were optimistically evaluated with conventional methods and both of the parallel and vertical fractions of seepage force are important factors affect the stability of slopes.
出处
《水文地质工程地质》
CAS
CSCD
2003年第2期41-45,共5页
Hydrogeology & Engineering Geology
