CAJ | 학술논문

由于蟒河天然来水量较小,再加上蟒河口水库库区地质条件复杂,多条断层是潜在的危险渗漏通道,故必须采取措施防止蟒河口水库大规模的渗漏发生.根据防渗方案和地质参数建立了蟒河口水库近坝址区三维有限元模型,通过多种工况的渗流分析与对比,结果表明:蟒河口近坝址区在仅有大坝防渗的情况下每年的渗漏量巨大,无法满足工程开发任务要求的蓄水量.设置灌浆帷幕和防渗面板措施处理以后,近坝区每年的渗漏量比仅有大坝防渗时大约可以减小880万m~3,且采用帷幕防渗措施以后,库区岩体内浸润线的空间位置有所降低,沿帷幕线上下游断面的水头差增大,说明防渗设计方案较为合理有效.在防渗措施和上游水位相同的情况下,下游水位越低渗漏量越大;在防渗措施和下游水位相同的情况下,上游水位越高近坝区渗漏量增加很快,表明渗漏量对上游水位的变化更加敏感.
유우망하천연래수량교소,재가상망하구수고고구지질조건복잡,다조단층시잠재적위험삼루통도,고필수채취조시방지망하구수고대규모적삼루발생.근거방삼방안화지질삼수건립료망하구수고근패지구삼유유한원모형,통과다충공황적삼류분석여대비,결과표명:망하구근패지구재부유대패방삼적정황하매년적삼루량거대,무법만족공정개발임무요구적축수량.설치관장유막화방삼면판조시처리이후,근패구매년적삼루량비부유대패방삼시대약가이감소880만m~3,차채용유막방삼조시이후,고구암체내침윤선적공간위치유소강저,연유막선상하유단면적수두차증대,설명방삼설계방안교위합리유효.재방삼조시화상유수위상동적정황하,하유수위월저삼루량월대;재방삼조시화하유수위상동적정황하,상유수위월고근패구삼루량증가흔쾌,표명삼루량대상유수위적변화경가민감.
As the natural inflow of Manghe River is smaller and the geological conditions of Manghekou reservoir are complex, a number of faults are potentially riskful leakage passage, some measures must be adopted to prevent the large-scale leakage from occurring. According to seepage and geological parameters, a three-dimensional finite element seepage model was established. By means of a variety of working condition analyses and comparisons, results show the seepage volume is large under the existing anti-seepage condition, so, it can not meet the engineering requirement. Grouting curtain could reduce about the leakage amount of 8. 8 × 10~6 m~3/yr and, make the saturation line decline and the water head difference is increase, in which case the designed anti-seepage project is effective. Seepage results also indicated that the amount of leakage is more sensitive to changes in upstream water level.