Approximation method for yielding support analysis in high ground stress soft surrounding rock tunnels
Zhiming Xu, Biao Dong, Yashuang Bai
TL;DR
This paper introduces new approximation methods to analyze interactions between soft rock and yielding support in high-stress tunnels, improving accuracy and reliability.
Contribution
The study proposes novel displacement and support force approximation methods for rock-support interaction in high-stress tunnel environments.
Findings
The proposed approximation methods accurately calculate relative displacement and support force in rock-support systems.
The bisection method shows better stability and convergence compared to trisection and substitution methods.
Geological conditions can affect the effectiveness of the approximation algorithms.
Abstract
In solving the whole process of interaction between soft rock and yielding support in high-stress environments in tunnels using mechanical analysis methods, it is challenging to simultaneously satisfy both displacement coordination and static equilibrium at the contact surface between the rock and the support structure. This paper, based on the mechanical analysis of rock and rigid support, considers the impact of the circumferential installation of yielding elements on radial displacement, and proposes displacement approximation and support force approximation methods using displacement coordination and static equilibrium as approximation conditions. The study fits curves of numerical simulation results and laboratory test results of yielding elements, and attempts to directly use the laboratory test data set of yielding elements as computational data. By calculating two circular…
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Taxonomy
TopicsGeotechnical Engineering and Analysis · Rock Mechanics and Modeling · Tunneling and Rock Mechanics