扩底后注浆灌注桩施工技术

扩底后注浆灌注桩是在普通灌注桩基础上通过扩底和后注浆两种施工工艺结合所衍生出来的一种新桩型。文章详细介绍了该桩的施工工艺，并结合工程应用对其经济及社会效益进行了分析，为该桩在高层建筑中的应用和推广提供了依据。     

黄土地区沉井井壁土压力研究

以西安市交通项目北三环雨水工程沉井为研究对象,对沉井的下沉全过程进行了实时监测,根据大量现场实测资料,深入分析了实测土压力与主动土压力和静止土压力的关系,得出了黄土分布地区沉井下沉不同深度时井壁土压力的大小及分布规律,以及简便易行的计算方法和经验公式。     

关于高层建筑采用深井基础的若干思考

本文讨论了高层建筑采用沉井基础的优越性及相关问题     

滨江软土地区高地下水位沉井施工关键技术

结合江阴滨江地区软土、高地下水位的特殊情况,以某钢厂料坑设备基础沉井工程为实例,阐述了沉井下沉前的施工准备、制作过程中刃脚支设、井壁制作等细节问题,并对沉井下沉中需注意的问题,以及沉井在下沉中标高测量的控制,沉井封底、沉井在施工过程中常见问题及处理方法进行了分析,为此类工艺在类似地区的使用积累了经验。     

浅议挖孔灌注桩的施工挖制及病害处理

在总结挖孔灌注桩的施工控制要点的基础上,提出了两种主要病害的施工处理措施.     

On site tests to estimate aquifer permeability of drainage area of south caisson anchorage construction of Taizhou Bridge

During the construction of the south caisson anchorage of Taizhou Bridge, the drainage area is located in the lower reaches of the Yangtze River and the permeability of stratums there is considerable. In order to maintain progress and guarantee safety during the sinking of the caisson, water should be drained in the initial period. Subsequently, detailed information about the aquifer permeability is required to make sure that the drainage will proceed successfully, which consequently necessitates the on-site estimation of the aquifer permeability in the drainage area. Therefore, the traditional pumping test and slug test are implemented respectively on site. The comparison of computational results of these two tests indicates that they are consistent overall. Notwithstanding, as slug test can be conducted with portable facilities in a short time and the manipulation is easy and few people need to be involved, the advantages of slug test is conspicuous compared with the traditional pumping test. It could be speculated that slug test will gain a prevalent application in the measurement of aquifer permeability in the future.     

Technical Research on Control of Caisson Construction for the Middle Tower Foundation of Taizhou Bridge

The real-time informational monitoring system is adopted in the construction of middle tower foundation of Taizhou Bridge for the first time. The geometric state of the caisson, the stress of upstream and downstream anchorage cables, underwater topography, the drag forces of the caisson cutting edge and frictional resistances of the sidewall and etc. are monitored in real time. According to the synthesized data analysis and decision-making system, the spatial states of the caisson are adjusted in time to locate and embed the deep water caisson precisely. The offset error of the caisson is less than 30 cm and the vertical error is 1/363 at the final stage. The control technology for construction of large caisson under deep water is concluded and would be helpful for the construction of bridge foundation in the future.     

沉井工艺在污水处理工程中的应用

沉井工艺在污水处理工程中得到广泛应用，其主要内容包括：沉井工艺原理及分类，沉井构造及制作，沉井下沉，沉井封底，沉井施工易出现的问题及处理方法。     

沉箱工法

沉箱工法在开式沉箱的基础上 ,进行了施工工艺的改革 ,产生了气压式沉箱 ,在有地下水的地区 ,进行挖掘作业时 ,通过向沉箱底部作业室注入加压空气 ,排开地下水 ,形成一个干作业面 .不仅改善了作业环境 ,提高沉箱的承载能力 ,由于未进行降水 ,不对邻近的建 (构 )筑物产生影响     

计算机辅助设计在小桥及基础中的应用

本论文依据计算机辅助设计理论及方法,利用 Script 接口设计的功能,按照铁路小桥墩台标准设计原则及沉井设计实际需要,通过计算机可自动检索所需数据,并完成铁路小桥墩台及基础的图形绘制.