地下建筑结构中的膜体防渗灌浆

膜体防渗灌浆是通过在结构内侧的钻孔将灌浆材料压入结构外侧形成防渗膜体的方法。该方法利用了接触灌浆原理,可保证浆液在建筑结构与地基土接触层之间形成灌浆帷幕。膜体防渗灌浆设计包括灌浆孔位设计、灌浆孔深设计、灌浆材料和灌浆压力设计四部分内容。介绍了三类膜体防渗灌浆工程实例:地下室混凝土底板防水、泄洪隧洞混凝土衬砌防渗和人防通道砖墙防水。实践证明此施工技术具有较好的技术经济性能。

Membrane impervious grouting for underground construction

The grouting material is forced into construction through the holes of its inside and impervious membrane formed in its outside.The method is called membrane impervious grouting.Using contact grouting mechanism,a grouting curtain is surely formed between structure and ground soil.The grouting design includesdesign of hole position,hole depth,material and pressure.Three cases are listed in this article,i.e.concrete plate of basement,concrete lining of flood-discharge tunnel,and walls of walkways of civil air defence works.The practice shows good results both technically and economically.