三峡工程二期上游围堰的帷幕灌浆

Curtain Grouting of Upstream Cofferdam for the Second Phase Project of the Three Gorges Project

三峡工程二期上游围堰防渗墙下帷幕灌浆是围堰基础防渗处理的主要形式。在防渗墙与基岩接触带以及基岩内的不同风化带岩体内,均进行了帷幕灌浆。根据帷幕灌浆的大量资料,综合分析研究接触带以及堰基基岩不同风化带内的帷幕灌浆的特征、透水性与岩体的可灌性关系、外冒漏浆控制因素以及帷幕形成后防渗的可靠性。

Curtain grouting of upstream cofferdam for the second phase project of the Three Gorges Project is the main form in the impermeableness treatment of coffered foundation.The curtain grouting has been conducted in many areas,such as impervious wall,bedrock contact zone and different weathered zone in the rock body.Based on the lots of the materials about curtain grouting,the characteristics of curtain grouting in bedrock contact zone and different weathered zone have been analyzed.In addition,the relationship between water permeability and grout ability was studied.The control factors for grouting leakage and reliability of impermeableness after curtain finished have also discussed.