沉管隧道地基加固区整平船插桩计算分析  

Calculation and analysis of pile penetration for self-jackup leveling ship in reinforced ground area for immersed tunnel

作　　者：李京爽[1,2,3] 喻志发 侯晋芳[1,2,3] 张延亿 LI Jing-shuang;YU Zhi-fa;HOU Jin-fang;ZHANG Yan-yi(CCCC Tianjin Port Engineering Institute Co.,Ltd.,Tianjin 300222,China;Key Laboratory of Port Geotechnical Engineering of Ministry of Communications,Tianjin 300222,China;Key Laboratory of Port Geotechnical Engineering of Tianjin,Tianjin 300222,China;China Institute of Water Resources and Hydropower Research,Beijing 100038,China)

机构地区：[1]中交天津港湾工程研究院有限公司,天津300222 [2]港口岩土工程技术交通行业重点实验室,天津300222 [3]天津市港口岩土工程技术重点实验室,天津300222 [4]中国水利水电科学研究院,北京100038

出　　处：《中国港湾建设》2020年第4期31-35,共5页China Harbour Engineering

基　　金：国家重点研发计划项目课题(2018YFC1508502);中交一航局技开基金(2018-8-12)。

摘　　要：对经DCM或高压旋喷桩加固后的外海沉管隧道地基,整平船施工时桩腿下插深度目前并没有成熟计算方法。以传统极限平衡理论为基础,考虑桩腿包围面积的影响、加固桩体强度影响以及加固体对整平船桩腿的约束作用3个因素,提出了加固区整平船插桩深度计算方法,并结合工程实例分析了插桩深度,可为外海整平船稳定性计算及类似工程提供参考。For the offshore ground of immersed tunnel reinforced by DCM or high pressure jet grouting pile,currently no sophisticated calculation method is found for the depth of pile leg penetration during leveling work for the self-jackup ship.Based on the traditional limit equilibrium theory,considering the influence of the surrounding area of the pile leg,the strength of the reinforced pile,and the containing effect of reinforced soil on the pile leg of the leveling ship,a calculation method was proposed for the depth of pile penetration in the ground reinforcement area for immersed tunnel,and the depth of pile penetration was analyzed with the proposed method.This method can serve as a reference for the stability assessment of the offshore self-jackup leveling ship and similar projects.

关 键 词：沉管隧道 DCM加固地基 高压旋喷桩加固地基 极限平衡 插桩深度 

分 类 号：U674.3[交通运输工程—船舶及航道工程] U459.5[交通运输工程—船舶与海洋工程]