沉管隧道岩基基础溶沟溶槽快速处理施工技术  

Construction technology for quick treatment of karst ditch and groove in rock foundation of immersed tube tunnel

作　　者：王晓姝 李丹 WANG Xiao-shu;LI Dan(No.3 Engineering Co.,Ltd.of CCCC First Harbor Engineering Co.,Ltd.,Dalian,Liaoning 116083,China;CCCC First Harbor Engineering Co.,Ltd.,Tianjin 300461;Tianjin Key Laboratory of Construction,Operationand Maintenance Technologies for Underwater Tunnels,Tianjin 300461,China)

机构地区：[1]中交一航局第三工程有限公司,辽宁大连116083 [2]中交第一航务工程局有限公司,天津300461 [3]天津市水下隧道建设与运维技术企业重点实验室,天津300461

出　　处：《中国港湾建设》2022年第12期132-136,共5页China Harbour Engineering

基　　金：中国交建立项课题(2014-ZJKJ-06)。

摘　　要：大连湾海底隧道沉管基础地质条件复杂,存在大量溶沟、溶槽。文章以施工中遇到的沉管基础溶沟、溶槽为例,论述了采用料斗开底法浇筑水下不分散混凝土与液压振动锤进行块石振密夯平结合的设计方案与施工方法,可有效减少差异沉降对沉管结构的影响,且具有施工便捷、施工效率高、周期短等特点,尤其适用于对差异沉降要求高的水下基础处理。The geological conditions of the immersed tube foundation in Dalian Bay Subsea Tunnel are complex, and there are a lot of karst ditches and grooves. Taking the karst ditches and grooves of immersed tube foundation in the construction as an example, this paper discusses it by using the design scheme and construction method of the combination of the hopper bottom opening method for pouring non-dispersible underwater concrete and the hydraulic vibration hammer for vibrating and tamping block stone, which can effectively reduce the influence of differential settlement on the immersed tube structure, and has the characteristics of convenient construction, high construction efficiency, short construction period, etc., especially suitable for underwater foundation treatment required for differential settlement.

关 键 词：溶沟 溶槽 料斗开底法 水下不分散混凝土 振密夯平 差异沉降 

分 类 号：U655.54[交通运输工程—港口、海岸及近海工程]