坦桑尼亚坦噶港老码头改造关键技术  

Key technologies for old wharf renovation project in Tanga Port,Tanzanian

作　　者：符成 赵瑞东[1] 贝建忠 朱幸科 FU Cheng;ZHAO Ruidong;BEI Jianzhong;ZHU Xingke(CCCC-FHDI Engineering Co.,Ltd.,Guangzhou 510290,China)

机构地区：[1]中交第四航务工程勘察设计院有限公司,广东广州510290

出　　处：《水运工程》2024年第8期122-126,共5页Port & Waterway Engineering

摘　　要：坦桑尼亚坦噶港老码头改造工程面临深厚泥炭质土软基、改造空间受限以及老码头严重破损等不利条件。采用适用于深厚泥炭质土软基的后板桩接岸式高桩码头结构,采用高压旋喷桩对码头岸坡进行加固,确保码头结构的安全性;采用Plaxis 3D有限元数值分析方法对水泥土桩的内部和外部稳定性进行复核;针对高有机质土中的高压旋喷桩的成桩质量难控的问题,采用降低浆液压力、采用复喷工艺、降低浆液水灰比、外掺石膏等措施提升了旋喷桩的成桩质量。There are the unfavorable conditions in an old wharf renovation project in Tanga Port,Tanzania,such as deep and soft peaty foundation,limited renovation space,and the serious damage of the old wharf.The high piled wharf structure combined with rear sheet-pile for shore connection is adopted,which is suitable to the deep and soft peaty soil foundation.The high pressure jet grouting pile technology is used to reinforce the wharf slope,which ensures the safety of wharf structure.The internal and external stability of cement-soil piles are checked by Plaxis 3D three-dimensional finite element numerical analysis method.In view of the problem that it is difficult to control the forming quality of high-pressure jet grouting piles in high organic content soil,measures such as reducing slurry pressure,using repeated spraying technology,reducing water-cement ratio,and adding gypsum are proposed to improve the quality of jet grouting piles.

关 键 词：码头改造 深厚泥炭质土 后板桩接岸结构 高压旋喷桩 

分 类 号：U656.1[交通运输工程—港口、海岸及近海工程]