The Application Researchon Construction Technology That "U" Anddispersion Type Prestress Anchor Cable With Removedcorein Foundation Pit Project

Prestressed anchor cable technology has been widely used in the pit,tunnel,slope,rock and soil of tall buildings in China.The present situation is that a large number of steel strand will be retained in the soil and cannot be cleared when prestress anchor cable loss effect no longer use.Not only it caused a great deal of waste materials,serious soil pollution,but also anchor cable out of the red line violated underground space of the nearby building.It became the obstacles when using the environment need to build other buildings,underground pipelines,subway,tunnel,or foundation pit supporting project.With construction needs that the development of the integration of Xiamen city outside the island,the development of subway construction has been in full swing,most of the subway tunnels are inevitable under wear,beside the large buildings,in addition to solve the problem that prestress anchor cable of the area surrounding the line both underground obstacles affect shield tunneling.It should be considered the problem that prestress anchor cable of new large building invasion of shield tunnel or encroach on the underground space,the construction technology that "U" and dispersion type prestress anchor cable with removed core in foundation pit project was pregnant.Although there are application the technology in the domestic part of the city,but very few to its complete set technology research,it has only just begun to Xiamen,it is necessary to study summary.This topic based on a real engineering case,the detailed test data,through the theory combined with practice,I analyzed the advantages and disadvantages,comb through process and mathematical analysis,and I summed up the key technology and construction points of the method through the carding process,mathematical statistics.This topic mainly around the technology successful application in foundation pit engineering.It expounded the concrete construction process of the technology in detail and detailed construction methods,it data to verify the application effect of this technology based on basic test,acceptance test andobservation and monitoring,so as to form a complete set of construction technology of this type of anchor cable.It will also list design method and calculation formula of the anchor cable,it will be design as a reference for future similar projects.This topic provides reference and references that construction of similar engineering through the engineering practice to form a set of operational techniques.Especially for the construction of foundation pit anchor cable recycling in Xiamen provides a complete construction method and important reference.