浅析砂卵石地基帷幕灌浆施工

On curtain grouting construction of sand and gravel foundation

砂砾石地层透水率较大,要形成一道完整防渗帷幕需选择合适的技术参数,目前,国内外对砂砾石地层的灌浆还没有一套完整的理论及实践体系,都是根据工地的不同特点通过试验来确定帷幕灌浆技术参数。青海海西州黑石山水库砂砾石灌浆采用水泥黏土混合浆液,实施低压、短段长花管灌浆法,达到了预期效果,该案经验可以供其他工地参考使用。

Sand and gravel stratums have higher permeable rate. Suitable technical parameters should be selected in order to form a complete anti-seepage curtain. Currently, there is no complete theory and practice system about the grouting of sand and gravel stratums at home and abroad. The technical parameters of curtain grouting are determined through tests according to different characteristics in construction site. Cement clay grouting mixure is adopted for sand and gravel grouting in Qinghai Haixi Prefecture Heishishan Reservoir. Low pressure and short segment length floral tube grouting methods are applied to reach desired effects. The experience can be used as reference for similar construction sites.