大梁水库土坝高压喷射灌浆防渗墙设计与施工

Design and Construction of Seepage-preventing Wall by High-pressure Gunite For Earth Dam of Daliang Reservoir

本文介绍了大梁水库大坝工程及坝址处的工程地质特性 ,通过对比静压灌浆、粘土防渗墙与高喷防渗墙三种方案的优缺点 ,确定采用高喷防渗墙方案。通过墙体型式选择、墙体厚度确定、孔距选择、墙顶处理对高喷防渗墙进行设计。最后 ,通过现场高喷试验 ,确定高喷灌浆的施工参数。

The earth dam project of Daliang Reservoir and the geological properties in and near the dam site are briefly introduced.The scheme of the seepage-preventing wall by high-pressure gunite is adopted, compared with the static pressure grounting scheme and the clay seepage preventing wall scheme.In the design of the seepage-preventing wall by high-pressure gunite,the types of the wall body is selected,the thickness of the wall body is determined,and the spacing between the grouting holes is chosen.Finally,the construction parameters are defined by the on-situ high-pressure gunite experiment.The check results show that the quality of the wall body meets the requirement.