垂直铺塑和高压旋喷联合止水帷幕在深水海堤围堰中的应用

围堰止水效果的好坏将直接影响工程后期施工的安全和施工进度。垂直铺塑和高压旋喷均是近年来发展起来的新型围堰止水帷幕技术，而在潮差较大的深水海堤围堰止水中采用单一的止水方法其止水效果较差，必须采用联合的止水方法才能满足要求。通过在集杏海堤开口改造工程海堤围堰特殊海水环境下垂直铺塑和高压旋喷联合止水帷幕的设计和施工实例阐述该项技术。

Application of vertically laid plastic and high-pressure jet grouting waterproof curtain in deepwater seawall cofferdam

The sealing effect of cofferdam will affect directly the safety and construction progress of the follow-up construction. Both the vertically laid plastic and high-pressure jet grouting are new waterproof curtain technology for the cofferdam developed in recent years. Any single sealing method is unfavorable for the deepwater seawall cofferdam in the area with a greater tidal range, thus a joint sealing method shall be adopted to meet the requirement. This method is expounded based on the design and construction of the joint sealing curtain of vertically laid plastic and high-pressure jet grouting in the special marine environment in the Jixing dike opening renovation project.