Analysis On Transverse Stress Performance Of Monolithic Precast Utility Tunnel Of The Main Part

To address the "spider’s Web in the sky" and "Street zip" cities such as pipeline laying problems of confusion and accidents,for the laying of pipelines built an exclusive space underground comprehensive pipe gallery--the future development trend of domestic study on comprehensive tunnel behavior is limited.Meanwhile in order to reduce environmental pollution and save costs,reduce labor,shortening the construction period and improving the engineering quality of the industrialized building receiving more and more attention in recent years,tunnel construction of precast construction method should be developed.Meanwhile,construction of prefabricated buildings,according to China’s national conditions on the use of concrete in situ connect prefabricated units to form a whole of precast construction method becomes the current Assembly-style buildings are often used for forms and mechanical behavior of precast composite tunnel became a new study topics and directions.Therefore,this paper uses the method of numerical simulation and theoretical analysis to analyze the mechanical performance of the integral part of the integral integrated corridor.The main contents are as follows:In this paper,the numerical simulation method of integrated integrated corridor is studied.Combined with the force of the pipe in the actual situation,the use of damaged plastic concrete model on the three sides of the tube under the static analysis of the state,the old and new concrete interface using a hard contact connection.And has been verified with the existing experiments to prove the correctness of the modeling method.The numerical simulation method is used to analyze the carrying capacity of the stapler.The corridor structure is divided into three parts: the node between the roof and the side wall,the middle part of the roof and the upper part of the wall.It is found that the stiffness of the model split from the upper part of the sidewall is greatly reduced,and the model split from the node between the top and the sidewall is most similar to the whole cast-in-place model.The numerical simulation method is used to analyze the mechanical performance of the laminated tube.In this paper,two different structural forms are carried out according to the difference between the overlapped plate and the side wall,and each kind of lap is also carried out.The results show that the stress of the laminated plate and the side wall is better than that of the brackets,and the reinforcement of the steel truss in the laminated plate can obviously improve the rigidity of the tube..In this paper,based on the method of numerical simulation of the integral corridor,thepaper analyzes the mechanical performance of the corridor under the two forms of subassembly and stacking.The research results can be used as the integrated integrated corridor The research and application of reference and basis.