预应力钢管锚索复合支护的工程条件中英文解析预应力钢管锚索复合支护的工程条件中英文解析.doc

预应力钢管锚索复合支护的工程条件中英文解析 Parsing of prestressed steel cable composite supporting engineering conditions 　随着我国城市化的快速推进及经济的快速发展、人口的快速增长，城市的建设土地变得越来越紧张，城中村改造项目中深基坑周边既有建（构）筑物密集，而且既有建（构）筑物建造年代较早，结构较差，基坑支护结构选择不当，容易造成周边既有建（构）筑变形破坏，同时深基坑的开挖支护也受到周边环境的极大制约。因此，为了保证地下结构的正常施工及深基坑周边环境的安全，必须选用合理安全经济的基坑支护结构。 “预应力钢管锚索”复合支护结构就是目前深基坑的开挖支护中一种非常有效的支护形式。该复合支护结构是将受拉杆件（钢管锚索）的一端固定在开挖基坑外的相对稳定的地层中，另一端与支护桩相结合的支护体系，由此将支护结构由被动受力转化为以主动受力为主，进而减少基坑周边的变形。所以“刚性桩+预应力钢管锚索+止水帷幕”复合支护结构同时解决了挡土和止水两方面的问题。本文从云南省宜良县第一人民医院改扩建项目基坑支护结构设计与施工技术层面出发，对该结构的工艺及质量进行了探讨。　　1. 工程概况　 Along with the rapid advance of urbanization and the rapid development of economy, the rapid growth of population, construction of city land is becoming more and more nervous, city village renovation project of deep foundation pit surrounding both built, dense, and both the building, building s earlier, poor structure, foundation pit supporting structure choose undeserved, likely to cause around the existing building, deformation and failure, and the excavation of deep foundation pit supporting is greatly restricted by the surroundings. Therefore, in order to ensure normal construction of underground structures and the safety of deep foundation pit surrounding environment, we must choose reasonable safety economy of foundation pit supporting structure. Prestressed steel tube anchor cable composite supporting structure is the deep foundation pit excavation supporting a kind of very effective supporting form. The composite retaining structure is tension member (steel cable) fixed outside the excavation of foundation pit at the end of the relative stability of the strata, on the other side and supporting pile with the combination of supporting system, which will be supporting structure by force into passive to active force is given priority to, and thus reduce the deformation of foundation pit surrounding. So rigid pile and prestressed steel anchor + water stop curtain composite supporting structure at the same time solved in two aspects of soi