Study On Application Of The Yang Wu Jian Soft Rock Tunnel Monitoring Measurement And The Convergence Confinement Method In Construction

At present,the problem of excavation and support for soft rock tunnel design and construction,whether it can be good solution to the soft rock engineering problem is the focus of the study of soft rock tunnel design and construction.In this paper,combined with the engineering geological characteristics of the soft rock tunnel,through the implementation of site monitoring,collection of surrounding rock and supporting structure deformation data,and the regression analysis was carried out to get the deformation curve of surrounding rock;By the use of finite difference software FLAC3 D on soft rock with different excavation methods for numerical simulation.the mechanism and the supporting method of deformation soft surrounding rock;And the use of the convergence confinement method theoretical calculation characteristic curve of surrounding rock and supporting characteristic curve are calculated,the deformation mechanism of soft surrounding rock is put forward,and its safety evaluation.The main research work of this paper includes:(1)This paper introduces the engineering geological conditions of the Yang wu jian tunnel;This paper describes the concrete implementation process of monitoring measurement in soft rock tunnel,and selects typical section to analyze the deformation curve of surrounding rock displacement and monitoring time after excavation,and further summarizes the deformation law of surrounding rock(2)Using FLAC3 D finite difference software,adopt different excavation methods of soft rock tunnel(CRD method,step method,full section excavation method)for construction process simulation,the merits of summing up the characteristics of each method,draw reasonable excavation method.(3)The characteristic curves of surrounding rock and supporting characteristic curve of soft surrounding rock tunnel are calculated and drawn by means of convergence constraint method.The calculation results are compared with the actual monitoring data,and the deformation mechanism of soft surrounding rock is put forward,and its safety evaluation.Look forward to the future of tunnels and the like,can give the unit design,construction and monitoring to provide useful suggestions.