Analysis On Greatly Transform Mechanism Of Anyuan Tunnels In Soft-wreak Surrounding Rocks And Research On Treatment Technology

The importance meaning for constructing tunnel in the mountain region as follows: overcome restrict of height to road form, shorten milage,and so on.Building tunnel of the highway in the mountain region, it is unavoidably to encounter the various of engineering geology disaster.Building tunnel under the sistuation of soft-wreak surrounding rocks, the surrounding rocks appear bigger deformation very easily. The greatly displacement of soft-wreak surrounding rocks has the features that large value of displacement in the initial stage and high speed of displacement, if don't take measures or can't control in time, it will cause the boundary of construction to be invaded easily, even collapse. That not only delayed the time limit for project but also threatenned the safety of the worker.The engineering problem of the greatly displacemeng tunnel in soft-wreak surrounding rocks main include decreasing of section, sinking of arch legs, spliting of arch waist, bulging of base and invading construction boundary.This dissertation relies on supervision and measurement and predicting geology of tunnel engineering in advance of AnYuan tunnel of YongDeng-GuLang highway, the section of LianYunGang-HuoErGuoSi which is the trunk line of National highway (GZ45). In condtion of carbonaceous shale geology, supervise the sinking from top of arch and convergence of periphery after primary lining. Analysis the data getted, conclude real time and whole time displacement change regulation of convergence at top and periphery of tunnel in soft-wreak rock. Consult norm and international document to define each parameter of rock, thus,build up a more similar finite element analyze model, and adopt a finite element software to imitate digging and lining process of tunnel under the actual work condition. According to imitating result,we can explore the mechanical property of lining structure. After taking the imitate result compare to supervision data, we can conclude elementary regular about greatly displacement of tunnel digging in the engineering geology condition of soft-wreak surrounding rocks. Summarizing the reason why invading construction boundary of tunnel occured delicately. Finally, put forward a handle project against greatly displacement of tunnel that has already taken place. From both the design and the construction side, bring up the prevention and cure project anainst greatly displacement after tunnel digging under soft-wreak surrounding rocks condition.The application of research achievement from dissertation provides a theory basis for the construction of the AnYuan tunnel engineering, also provides design and construction experience for building tunnel under similar engineering geology condition following-up.Therefore, it has highly value to be consulted.