内河重力式码头结构设计优化

Optimization of structural design for inland river gravity wharf

重力式码头由于自身重力较大,原状土地基承载力一般不能满足要求。为解决内河码头建设石料短缺、地基承载力不足等问题,提高挖方土资源利用率,结合山东济宁地区跃进沟、梁山码头设计经验,根据施工特点、水文地质条件及使用要求,对不同码头结构方案的特点、适用性进行比较分析,在内河码头结构设计中采用新型的小木桩复合地基方案,并从墙后回填料选用开挖土方、码头结构断面、装船机轨道基础形式等方面提出优化创新思路,在工程建设中得以应用;同时总结小木桩复合地基的受力原理及计算方法、回填料参数选择、施工质量控制等。结果表明,采用现浇素混凝土重力式结构和小木桩复合地基作为码头主体结构形式和地基处理方式、墙后回填料采用疏浚土方,既确保工程质量,又能有效节省投资。

Because of the heavy weight of the gravity wharf,the foundation of undisturbed soil cannot meet the requirement of bearing capacity.In order to solve the problems such as the shortage of stone materials and the insufficient bearing capacity of the foundation for the construction of inland river wharves,and improve the utilization rate of the excavated earth resources,we combine with the design experience of the Yuejin Ditch and the Liangshan County wharf in Jining area of Shandong Province,compare and analyze the characteristics and applicability of different wharf structural schemes according to the construction features,hydrogeological conditions and operational requirements,adopt a new type of small wooden pile composite foundation scheme in the structural design for inland river wharf,and propose the new ideas for optimization and innovation from the aspects of the selection of excavation earthwork for backfill materials behind walls,the structural cross-section of wharves,the track foundation type of ship loaders,etc.to apply for project construction.At the same time,we summarize the principle and calculation method of small wooden pile composite foundation,selection of backfill parameters,construction quality control etc.The results show that adopting the gravity structure of cast-in-place concrete and the composite foundation of small wooden piles as the main structure form and foundation treatment method of the wharf,and adopting the dredging earthwork as the backfill material behind the wall can ensure the quality of the project and save the investment.