摘要
泥炭质土因其有机质含量高、含水量高、压缩性高、强度低、固结慢等特点,加固处理难度较大,严重危害工程安全。依托某境外老板桩码头改造项目,针对其存在深厚泥炭质土软基、堆场面积狭小、老码头结构破损严重、改造空间受限、边改造边运营等突出特点,拟定多种改扩建平面和结构方案。从码头运营、结构可靠性、经济性和施工难度等方面分析各方案优缺点,最终提出适应深厚泥炭质土软基条件下老码头改扩建工程的推荐方案,并分析了施工过程中关键技术难点及注意事项,可为类似工程提供借鉴。
Peat soil is difficult to consolidate and seriously endangers engineering safety because of its high organic content,high water content,high compressibility,low strength and slow consolidation.Relying on the expansion project of an overseas existing steel sheet pile wharf,this paper draws up a variety of reconstruction and expansion plans and structural plans in view of its outstanding characteristics such as deep peaty soil soft foundation,small yard area,serious structural damage of the old wharf,limited renovation space,and operation in construction stage.The advantages and disadvantages of each scheme are analyzed from the aspects of wharf operation,structural reliability,economy and construction difficulty,and finally the recommended scheme is proposed to adapt to the old wharf reconstruction and expansion project under the condition of deep peat soil soft foundation.Besides,the key technical difficulties and precautions in the construction process are analyzed,which can provide reference for similar projects.
作者
吕威
贝建忠
孙国辉
LYU Wei;BEI Jianzhong;SUN Guohui(China Harbor Engineering Co.,Ltd.,Beijing 100027,China;CCCC-FHDI Engineering Co.,Ltd.,Guangzhou 510290,China)
出处
《水运工程》
2024年第2期66-71,130,共7页
Port & Waterway Engineering
关键词
老码头改造
深厚泥炭质土
水泥搅拌桩
高压旋喷桩
后板桩高桩码头结构
reconstruction and expansion of existing wharf
deep peaty soft soil
cement mixing pile
high-pressure jetting grouting
high-piled wharf structure with rear sheet pile
