Construction Control And Analysis Of Long-span Reinforced Concrete Arch Bridge

The reinforced concrete arch bridge of long-span deck type,with relatively simple struct ure good-looking appearance and strong span capacity,being a common bridge type of Chine se construction.Throughout the construction methods of the reinforced concrete arch bridge o f deck type,the cable erection is widely used.The structural stiffness is formed gradually in di fferent phases,along with the complicated whole process of construction and the long constru ction period,we may conclude that the key to achieve the goal of the finished bridge is to hav e an accuracy control of the bridge construction process.To ensure the finished bridge meet th e design requirements and make the internal force of structure is always under control in the c onstruction process,the construction control work is absolutely necessary.This paper is based on the Diaoyutai bridge of Xiangxi Autonomous Region of Hunan province.The writer tries t o make a discussion about it from the following aspects:Firstly,on the basis of collecting a great deal of literature at home and abroad,the writer introduces the present research situation clearly about the construction technical methods of th e reinforced arch bridge of long-span deck type.The thesis emphatically states the structural characteristic and the monitoring points of the cable erection by combining the practical appli cation of this program with the theoretical basis.Secondly,the paper provides details about the process of the lifting construction closing arch rip of the Diaoyutai Bridge and the monitoring points of the installation project of the arch rip.Third,introduces the calculation of cable force of several common methods,discusses the optimal position Trying to give a real stimulation of the arch rip lifting process by the finite element model named “Midas” and calculate the value of the cable force,the internal force and the intensity in every construction stage.Finally,on the issues of the main arch ring construction and the load escalation,the write r tries to give an emulation analysis on the total bridge model by the finite element software n amed " Midas".At the same time,we should calculate the displacement value and the stress value.Confine the stress value to the permissible count and the measured displacement value to the theoretical value and design value.Strictly control the stress of the arch load.