塑性混凝土防渗墙墙下帷幕灌浆预埋管技术研究

Study on Pre-embedded Pipe Technology for Curtain Grouting Underneath Plastic Concrete Cut-off Wall

在一般的基础防渗工程中,对于覆盖层部分多采用防渗墙进行防渗,覆盖层下的基岩则采用帷幕灌浆防渗,即“墙幕”结合形式的基础防渗工艺。对于“上墙下幕”的基础防渗工艺,预埋灌浆管是该工艺中非常重要的一项施工技术,因为预埋灌浆管埋设质量的好坏将直接关系到工程后期墙下的帷幕灌浆施工。防渗墙预埋管施工技术先进能够降低后续施工的难度,既能提高施工进度,又避免了钻孔穿墙的风险。

Normally,cut-off walls are mostly arranged at the overburden to prevent seepage,and curtain grouting are adopted at the bedrock underneath the overburden for anti-seepage purpose,which are in combination named the anti-seepage technology of"wall and curtain".For the foundation anti-seepage technology of"upper cut-off wall and underneath curtain grouting",the embedded grouting pipe is a very important construction technology,because the quality of the embedded grouting pipe will directly affect curtain grouting underneath the cut-off wall in the later stage.The advanced construction technology of the embedded pipe in the cut-off wall can reduce the difficulty of subsequent construction,improve the construction progress,and avoid the risk of drilling through the wall.