河口村水库坝肩裂隙岩体防渗处理分析

发布时间：2018-07-28 11:39

【摘要】：河口村水库两岸坝肩岩体裂隙发育,绕坝渗漏较为严重。进行帷幕灌浆防渗处理后,蓄水期绕渗监测资料分析表明,两岸地下水位变化基本正常,部分测压管帷幕前后水位差异不明显。进一步构建三维有限元水文地质模型,并采用考虑局部缺损的帷幕灌浆等效渗透系数进行渗流数值模拟分析,结果表明:坝肩裂隙岩体灌浆处理后,渗漏量降低了86.5%,防渗处理效果显著;各部位水力梯度不大,在坝肩裂隙岩体内形成渗透稳定问题的可能性不大。左岸山体仍是最主要的渗漏通道,占总渗漏量的52.69%,应控制水位抬升速率,加强渗流监测并进行必要的补强灌浆处理。
[Abstract]:The cracks of the abutment rock on both banks of Hecoucun Reservoir are developed, and the seepage around the dam is more serious. The analysis of seepage monitoring data during the storage period shows that the variation of groundwater level on both sides of the bank is basically normal and the difference of water level before and after the curtain of some pressure measuring pipes is not obvious. A three-dimensional finite element hydrogeological model is further constructed, and the equivalent permeability coefficient of curtain grouting considering local defects is used to simulate the seepage flow. The results show that: after grouting treatment of dam abutment fissure rock mass, The seepage amount is reduced by 86.5, the effect of seepage prevention is remarkable, and the hydraulic gradient of each part is small, so it is not possible to form the seepage stability problem in the fractured rock mass of dam abutment. The left bank mountain is still the main leakage channel, which accounts for 52.69% of the total leakage. It is necessary to control the water level uplift rate, strengthen the seepage monitoring and carry out the necessary reinforcement grouting treatment.
【作者单位】：四川大学建筑与环境学院;南京水利科学研究院水文水资源与水利工程科学国家重点实验室;黄河水利委员会水文局;
【基金】：国家自然科学基金资助项目(51609150) 国家重点研发计划项目(2016YFC0401602) 水利部公益性行业科研专项(201501036) 河南省水利科技攻关项目(GG201546) 中央级公益性科研院所基本科研业务费专项资金项目(Y716020,Y716007,Y716017,Y216004)
【分类号】：TV698.23

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