降雨量和水位对水库边坡变形影响分析

Analysis of Influence of Rainfall and Water Level on Reservoir Slope Deformation

以北方某地水库为对象,通过虹吸式雨量计与压力式水位计设置监测点,对该地水库边坡从降雨量和水位线两个方面进行监测,根据监测结果,对该水库的前部边坡横向位移及纵向沉降量的变形特征进行分析。结果表明,对比坡体前部,中后部发生变形的程度较小,其原因是后部水位较低,受到水体侵蚀影响较小,因此相较于前部更为稳定;水位是边坡发生变形的重要决定因素,而降雨量对边坡影响较小,且降雨影响主要是通过影响水库水位来达到影响边坡稳定的结果;该水库边坡的变形滑塌主要为前拉后推式,造成该种情况的因素可分为内部因素和外部因素,且外因中水位对其影响较大,内因中坡体土质和岩质的力学关系是其边坡稳定性及变形程度的重要因素。

This paper takes a reservoir in a certain place as the object,sets up monitoring points through siphon rain gauge and pressure water level gauge,and monitors the slope of a certain place from two aspects of rainfall and water level.The deformation of the slope was analyzed,and it was found that compared with the front part of the slope,the deformation degree of the middle and rear part was smaller.Water level is an important determinant of slope deformation,while rainfall has little effect on the slope,and the impact of rainfall is mainly by affecting the water level of the reservoir to achieve the result of affecting the stability of the slope;the deformation and collapse of the reservoir slope is mainly a front-pull and back-push type.The factors that cause this situation can be divided into internal factors and external factors,and the external factor has a greater impact on the water level,and the internal factor is the mechanical relationship between the soil and rock quality of the slope body,and important factors in the degree of flexibility and deformation.