大孔隙地层控制性套阀管帷幕灌浆法的设计与应用

Design and application of curtain grouting method with controlling sleeve valve pipe for large-cavity strata

传统套阀管法对于级配良好的天然覆盖层效果很好,但在大孔隙或孔隙存在一定流速动水时,灌浆稀释效果变差。简述了将高触变抗水膏浆引入套阀管中,对套阀管法进行了改进,形成了大孔隙地层控制性套阀管法施工技术,同时对大坝应用大孔隙地层控制性套阀管法帷幕灌浆进行防渗处理,并取得了良好效果。

Sleeve valve pipe method has a well effect in natural cover with good gradation,which is not so satisfied in large-cavity strata as grout dilution.An introduction is made on how to improve method of sleeve valve pipe by introducing high thixotropic water-resistant plaster.Then the construction technology with controlling sleeve valve pipe for large-cavity strata can be applied to grouting engineering which has achieved a good result.