大岗山水电站防渗帷幕科研试验区的化灌设计与选材

针对四川大岗山水电站特殊的地质条件,采用YDS高渗透环氧化学灌浆材料,对Ⅴ1类辉绿岩脉开展水泥/化学复合灌浆的室内模拟试验和现场试验,分析灌浆参数、施工工艺、浆液扩散范围等有关技术问题,考察了化学灌浆的可行性,提出了合理的工艺参数。研究结果表明,YDS高渗透环氧化学灌浆材料灌浆与水泥灌浆组成的复合灌浆方式完全能够满足大岗山水电站防渗帷幕工程的要求,其化灌设计经济、合理,工艺操作可行,符合化学灌浆施工规范,现场试验效果满足设计要求。

Design and Selected Materials of Chemical Grouting in Impervious Curtain Experimental Area of Da-Gang Mountain Hydroelectric Power Station

In special geological conditions sichuan Da-Gang hydropower station, YDS high permeability epoxy chemical grouting material was used to carry out cement/chemical compound grouting indoor simulation test and field test for V1 diabasic dike. Meanwhile, grouting parameters, construction technology, grout diffusion range and other relevant technical problem were also analyzed. Moreover, the feasibility of the chemical grouting and the reasonable process parameters were investigated and summarized. The research results showed that composite grouting way of YDS grouting material and cement can completely satisfy the requirement of Da-Gang hydropower station impervious curtain engineering where not only the design economic, reasonable and feasible process operations were in accord with chemical grouting construction standard, but also the field test results meet the design requirements.