横山岭水库黏土斜心墙土石坝渗透参数敏感性分析

Sensitivity Analysis of Permeability Parameters in Clay Inclined Core Embankment Dam of Hengshanling Reservoir

为研究黏土斜心墙土石坝坝体各分区及坝基土石料渗透系数对渗流场计算结果的影响,以横山岭黏土斜心墙土石坝为例,基于正交设计法,就坝体各分区及坝基土石料渗透系数取值对心墙逸出高程H、心墙最大水力坡降Jmax及坝轴断面单宽渗流量q等渗流场指标的敏感性进行分析。通过分析,分别得到黏土斜心墙土石坝不同部位土石料渗透系数值对3个渗流场指标的敏感性大小排序,确定了各指标的主要影响因素,并讨论了主要影响因素与渗流场指标的关系。研究结果可为斜心墙土石坝的结构设计及施工提供参考。

In clay inclined core embankment dam,the permeability coefficients of dam body zones and dam foundation have some influence on the calculation results of the seepage field. In order to study the influence,the clay inclined core embankment dam of Hengshanling Reservoir was token as an example,analyzing the sensitivity of which the permeability coefficient values of dam body zones and dam foundation is to three parameters of seepage field,core overflow point elevation H,maximum hydraulic gradient of core Jmaxand unit rate of seepage flow through dam axis q,based on the orthogonal design method. The result exposes the sort of the sensitivity and the main influences of the three parameters,meanwhile discusses the relationship between the main influences and the parameters of seepage field. The results can provide a reference for the structural design and construction of the clay inclined core embankment dam.