封拱温度对茨竹湾水库库底拱体结构影响有限元分析

Finite element analysis of influence of sealing temperature on arch structure of bottom in Cizhuwan Reservoir

为适应茨竹湾水库所在地岩溶地质地形条件,解决其长年渗漏而无法正常蓄水的问题,提出了采用供体结构对水库库底进行封堵的方法。根据经验,封拱温度对拱体结构的整体沉降及应力有较大影响。采用三维有限元分析方法,分析拱体在不同封拱温度下的整体沉降、最大拉应力和最大压应力,结果表明:随着封拱温度的增加,沉降逐渐增大,最大拉应力和最大压应力也逐渐增大。建议采用10℃作为水库的封拱温度。

In order to adapt to the karst geology and topography of the location of the Shizhuwan.Reservoir and solve its long-term leakage problem,the method of using the donor structure to seal the bottom of the reservoir was proposed.According to experience,the sealing arch temperature has a great influence on the overall settlement and stress of the arch structure,so it must be studied.The three-dimensional finite element analysis method was used to analyze the overall settlement,maximum tensile stress and maximum compressive stress of the donor at different sealing arch temperatures.The results show that as the sealing arch temperature increases,the settlement gradually increases,the maximum tensile stress and the maximum compressive stress also gradually increases.It is recommended to use 10°C as the sealing temperature of the reservoir.