Study On Influence And Protection Of Shallow Buried Tunnel Construction On Pile Foundation Of Adjacent Bridge

With the development of society,more and more people develop underground space.Xi 'an belongs to the loess area,xi 'an area of underground cavern excavation and underground tunnel construction to study the influence of formation and buildings(structures),not only has a guiding significance on construction of subway in xian,for infrastructure construction in the western region has important research value.Taking the construction of a subway tunnel in xi 'an as an example,this paper mainly carried out the following work:(1)From the theory,the influence factors of the construction method of shallow buried tunnel,the law of surface deformation,the deformation of the stratum and the bearing capacity of the pile foundation and the influence of the formation deformation on the pile foundation are analyzed,and the influence law of the construction of the shallow buried tunnel on the pile foundation of the adjacent bridge is found out,and the measures for controlling the deformation are also discussed.(2)Using the MIDAS/GTS simulation software and combining with the actual engineering simulation,the influence of the construction of a subway tunnel in Xi'an on the pile foundation of the adjacent bridge under the auxiliary support of the non pipe shed is analyzed.The deformation law of the stratum and the bridge pile foundation is obtained.Through the analysis,it is concluded that the deformation requirements of the bridge can not be met under the condition of no pipe shed support.It must be strengthened effectively.(3)Through the field monitoring data and simulation comparison,the reliability of the simulation software is verified.It is concluded that the displacement of the stratum and the bridge pile after the application of pipe shed can meet the requirements of the standard,and the support scheme is given in combination with the practice.Finally,the risk assessment and...