一种新型可控黏土复合膏浆在动水地层防渗中的应用

目的]研究一种新型可控黏土复合膏浆在动水地层中的防渗应用,治理岩溶地区的水库堤坝渗漏以及大量架空结构的土(堆)石围堰的渗漏问题等。方法]采用试验的方法,研究掺入新型外加剂具有流动度低,凝结时间可控以及良好的抗水流冲释能力的复合膏浆在动水地层的防渗堵漏效果。结果]使用固化剂和速凝剂,其掺入量对膏浆的抗水流冲释能力、初凝时间以及流动度均有显著影响,从而可以通过固化剂和速凝剂掺入量的不同来有效的调节复合膏浆的物理力学性质,使其达到工程要求。结论]采用此种可控黏土复合膏浆处理含有强透水砂卵石的动水地层的渗漏问题,可以使渗漏地层的防渗能力有效地大幅度提高,处理效果显著。

Application of New Controllable Clay Composite Paste-slurry in Seepage-proofing of Strata with Flowing Water

Objective] In order to prevent the seepage problems in reservoir and cofferdams in lots of overhead structures, the paper try to use a new controllable clay composite paste in strata with following water. Methods] An experiment was designed to study the effect of a new type of compound paste with a new admixture, which has low fluidity, controllable condensing time, good water resistance and water release, on the anti-leakage and sealing process in the soil strata with flowing water. Results] The content of curing agent and quick condensing agent in the paste has a significant effect on its resistance to water flow, the initial condensing time and the flow rate. Adjusting the content of curing agent and quick condensing agent could effectively change the physical and mechanical properties of the composite paste, thus meet the engineering requirements. Conclusion] This kind of controllable clay can be used to deal with the leakage problems in the dynamic water stratum with strong permeable sandy pebbles and effectively improve the seepage-proofing ability of the reservoir.