黔东南娄山关组白云岩区帷幕灌浆方法

Curtain Grouting Method in Dolomite Area of Loushanguan Formation in Qiandongnan Prefecture

目前黔东南州内娄山关组白云岩区水利工程的帷幕灌浆一般采用自下而上的灌浆方法,普遍存在灌浆塞在设计孔段无法封闭的问题,灌浆效果难以达到设计防渗要求,多数情况需要补灌。为了合理选择黔东南州娄山关组白云岩地区的帷幕灌浆方法,通过分析该白云岩地层分布、岩性特征、各帷幕灌浆方法特点及适用范围,依据黔东南州该区的灌浆现状,总结出应对措施及灌浆方法选择建议。由于该区该地层分布较广,灌浆方法合理选择对该区水利工程建设具有重要意义。

At present,the bottom-up grouting method is generally used for curtain grouting of water conservancy projects in the dolomite area of Loushanguan Formation in Qiandongnan Prefecture.There is a common problem that grouting plugs can not be closed in the designed hole section.Grouting effect is difficult to meet the design impervious requirements,and supplementary grouting is required in most cases.In order to reasonably select curtain grouting method,this paper analyses the dolomite stratum distribution,lithological characteristics,curtain grouting method characteristics and application scope.According to the present grouting situation in this area of Qiandongnan Prefecture,the corresponding measures and the selection suggestions of grouting methods are summarized.Due to the wide distribution of this stratum,the reasonable selection of grouting method is of great significance to the construction of water conservancy projects in this area.