酸性污水库坝渗流稳定性分析及防渗加固处理

来源期刊：中南大学学报(自然科学版)2006年第6期

论文作者：陈永贵 张可能 邹银生

文章页码：1171 - 1176

关键词：酸性污水库;土石坝;渗流;稳定性;加固;有限元法

Key words：acidic wastewater reservoir; earth rock-fill dam; seepage; stability; reinforcement; finite element method

摘    要：根据江西省某铜矿酸性污水库的地质勘探资料,对该污水库的坝体、坝基和坝肩进行有限元渗流计算及坝坡抗滑稳定性计算,分析大坝的渗流情况、渗透变形和稳定性问题,并提出相应的防渗加固措施。计算结果表明:大坝渗漏主要由坝肩和坝体渗漏、坝基渗流、粘土防渗斜墙失效和反滤层堵塞等引起,在渗透情况下坝体安全系数为1.012;采用高压摆喷灌浆和粘土固化注浆技术综合治理后,坝区的总渗水量降低90%,在设计洪水位条件下坝体安全系数为1.520,说明所提出的措施合理、可靠。

Abstract: Based on geological information of the earth rock-fill dam of acidic wastewater reservoir in Jiangxi Province, the seepage finite element calculation was conducted for dam body, damfoundation and side bank, and the dam slope stability analysis was made for the reservoir. The leakage and the percolation failure as well as the dam slope stability problem were discussed firstly; then the measures to anti-seepage and reinforce the dam were proposed. The results show that the seepage comes from dam body, dam foundation, side bank, failure of the clay anti-seepage wall and the blockage of anti-filter dam. The safety coefficient of the dam is 1.012 under seepage and it turns to 1.520 after the dam is reinforced by high pressure jet grouting and clay-solidified grouting. The anti-seepage rate of 90% shows that the reinforcement is feasible and rational.