适应深厚复杂岩土层防渗灌浆的可控性黏土水泥稳定浆材及快速配制

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摘要深厚复杂岩土层同一钻孔的可灌性差异显著，灌浆材料要随机应变，灌浆工艺方法要适应性强。现有的灌浆材料可控性不足，可灌性单一；目前的灌浆方法在每一灌浆孔段，逐级变浆，浆材扩散难以控制，弃浆浪费严重，施工工效低。充分考虑灌浆施工工艺的实际要求、灌浆材料性能优化等，通过大样本室内试验，利用黏土的良好性能、水玻璃系浆液塑性黏度和屈服强度很低、水泥等的固化和强度特性以及改性剂，研制一种可控性黏土水泥稳定浆材，不仅性能指标满足一般工程的防渗要求，而且浆液流变参数、凝结过程、结石体参数等可在较大范围内调整。对于复杂地层，依据受灌岩土体性质的差异，选用研制的可控性浆材和相应的供料方式，可实现浆材的快速配制，变浆便捷，弃浆少，成本低。在托口水电站河湾地块防渗帷幕工程中，已完成的灌浆试验表明，与传统浆材和施工方法相比，注入量降低约65%，施工台月效益(m/(台·月))提高约30%，灌浆质量达到设计要求，研究成果可在该工程及类似工程中推广应用。

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	张贵金1
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关键词 ：水利工程, 复杂岩土层防渗, 可控性稳定浆材, 防渗灌浆试验, 浆材配制

Abstract：With the marked difference of the groutability in one borehole of the deep complex rock and soil stratum，grouting materials must change accordingly and grouting methods should enjoy great suitability. The present grouting materials is short of controllability and groutability. In the present grouting method，the density changes gradually in every length of grouting section which makes the grout scattering difficult to control，the grout wasteful to discard and the work efficiency low. Considering the practical needs of the construction technology in the grouting process and the performance optimization of the grouting materials，a controllable stable slurry is made mainly from clay and cement which is developed by taking advantages of the good performance of the clay，very low plastic viscosity and yield strength of sodium silicate slurry，the traits of cements solidification and strength，and modifier through the laboratory test of large-sample. The performance of this kind of slurry satisfies the general needs of the anti-seepage engineering，besides，the rheological parameter，setting time and concretion parameters can be adjusted on a large scale. As for the complex stratum，the tested controllable grouting materials and corresponding means of providing the materials can be selected according to the differences of the characteristics of grouted rock and soil，which can realize quick preparation of the grouting materials during the process and make the grouting easier，the discard grout few and the cost lower. The completed grouting test in the anti-seepage curtain engineering at river bend plot of Tuokou hydropower station indicated that compared with the traditional grout and grouting method，the injection volume has reduced about 65%，the efficiency of the rigmonth(m/(rig·month)) has increased about 30%；and the grouting quality meets the design requirements. Hence the research result can be widely applied to the project as well as other similar ones.

Key words： hydraulic engineering anti-seepage in complex rock and soil stratum controllable stable slurry anti-seepage grouting test made up slurry

引用本文:

张贵金1，杨松林2，陈安重3，张群2. 适应深厚复杂岩土层防渗灌浆的可控性黏土水泥稳定浆材及快速配制[J]. 岩石力学与工程学报, 2012, 31(S1): 3428-3436.
ZHANG Guijin1，YANG Songlin2，CHEN Anzhong3，ZHANG Qun2. DEVELOPMENT AND QUICK-PREPARING OF CONTROLLABLE CLAY CEMENT STABLE SLURRY ADAPT TO ANTI-SEEPAGE GROUTING IN DEEP COMPLEX ROCK AND SOIL STRATUM. , 2012, 31(S1): 3428-3436.

链接本文:

https://rockmech.whrsm.ac.cn/CN/Y2012/V31/IS1/3428

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