A bulk cargo wharf yard foundation contained a weak layer of muddy clay, although two side foundations of the yard were reinforced by cement mixing piles. However, a sliding failure as well as lateral translation collapse occurred where the thickest muddy clay was during the fill of ore heap on trial. In order to find the real reason for the sliding failure and lateral translation collapse and to provide the design basis and reference for repair, a large centrifugal model, test was conducted. The filling process of the ore heap was simulated, and the vertical and horizontal displacement deformation of the surface of the ore heap and the yard foundation was measured. Firstly, the turning points of the displacement and deformation development were identified, and the critical point of stability and the ultimate bearing capacity of yard foundation were obtained. Secondly, based on the displacement field on the cross section of yard ground under the load of the ore heap, the failure mode and the development process of the sliding and translation failure of the bulk cargo wharf foundation were analyzed and discussed. The results showed that in the filling of the ore heap, its shallow subsoil subsidence and sliding failure first appeared due to its insufficient bearing capacity. Secondly, the subsidence of shallow subsoil occupied the space of underlying soft muddy clay layer, forcing it to lateral translation towards the side of the Nanliu River, resulting in a wider range of collapse.

随着我国内河航道管理模式的不断发展和变化,对数字化技术的要求也越来越高.因此,本文研究了基于数字航道技术的内河航道管理应用,介绍了数字航道技术的基本内涵,对内河航道管理现状进行了细致的分析,并对其体系结构和工作流程进行初步探讨.探究表明,数字航道将成为我国内河航道管理的一项重要技术支持.加强内河航道数字化技术的运用,可以充分发挥数字化优势,有助于促进我国内河航道中各项航运业务的可持续发展.

水上灌注桩施工须先行搭设施工平台,为加快施工平台的搭设速度,减少水上作业工作量,降低施工成本,在实际工程中探索将桩基施工平台与浮式施工平台相结合,设计一种能够通过自身浮力浮运安装的平台型式.平台在陆上制作完成后,依靠自身的浮箱浮运至桩基施工区域,利用驳船辅助定位后打入定位桩固定.灌注桩施工完成后,拔出定位桩,浮动平台移动至下一组灌注桩位置定位施工.通过建模分析验算结构的安全性并优化结构型式,经工程实际应用表明,移动浮箱灌注桩施工平台具有可行性,有不错的应用前景和较好的经济效益.

振动沉管法是CFG桩的常见工法,振动锤振动带动沉管下沉,振动锤的激振力、振动系统总质量及工作振幅,是选择振动锤型号的三大参数.我国目前尚无振动锤选型的相关规范,在振动沉桩锤选型时存在一定困难.特别对于湛江地区这类浅层存在硬土层的地层结构,更需准确进行振动锤的选型.文中收集整理了国内外振动锤选型的相关经验方法,并通过实际工程验证.对CFG桩振动沉桩锤选型的分析和总结,可供类似工程参考借鉴.