Study On Rheological Properties Of Deep Tunnel And Support Structure

With the rapid development of infrastructure, the stability and reliability of long-large-deep tunnel and group of large-scale underground space structure has become a major issue to be solved. The long-term stability and reliability of deep tunnel engineering are closely related to Rheological properties of tunnel structure. In this paper, rheological property of tunnel structure is studied by permorming triaxial rheological test on the rock samples and lining concrete collected on the spot. For tunnel is the entity of wall rock and supporting structure, the tunnel construction and the ageing characteristics of wall rock and of supporting structure are analyzed by non-linear finite element numerical simulation. The main work are as follows:①First, the status quo is summarized in three aspects, which are the rheological properties, rheological test and rheological properties of wall rock and concrete support structure, respectively.②Model theory of the theological theories is introduced.③Using MTS815 Hydraulic Servo System, the triaxial compression deformation and rheology experiments on the tunnel wall rock and lined concrete are performed, and the law of concrete axial strain changing with time under different stress level is studied.④Rheological parameters are calculated by the analysis of test data on the LUBBY2 model.⑤On the finite simulation platform ADINA, how stress, displacement and plastic region of the wall rock and supporting structure changes with different rheological properties of wall rock and concrete supporting structure is analyzed.