A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
The influence of the heterogeneity of rock mass for surrounding rock stability evaluation of a tunnel
Abstract In this study, we reviewed the influence of various heterogeneity factors of rock mass on the displacement of the tunnel. We derived the critical deformation formula and proposed the stability evaluation method via the elastoplastic analytical solution of a circular tunnel. The traffic tunnel of the Sanhekou hydro-junction project was taken as an example to establish the heterogeneous rock mass finite difference method model. A new method is proposed to obtain the most basic heterogeneous rock mass parameters, and evaluated the stability of the heterogeneous rock mass tunnel. The results showed that when the weak interlayer is randomly distributed, the deformation of the wall increases with the decrease in the average value of the parameters, and it is significantly affected by its standard deviation. The core of the stability evaluation process of the heterogeneous rock mass tunnel is to obtain the radius of the plastic zone and the distribution of weak interlayer. If the distribution characteristics of the interlayer are not determined, the critical deformation may be appropriately reduced by 15% to evaluate the stability of the tunnel. We also verified the reliability of the stability evaluation method by monitoring the 2# diversion tunnel of the Zipingpu hydraulic project.
The influence of the heterogeneity of rock mass for surrounding rock stability evaluation of a tunnel
Abstract In this study, we reviewed the influence of various heterogeneity factors of rock mass on the displacement of the tunnel. We derived the critical deformation formula and proposed the stability evaluation method via the elastoplastic analytical solution of a circular tunnel. The traffic tunnel of the Sanhekou hydro-junction project was taken as an example to establish the heterogeneous rock mass finite difference method model. A new method is proposed to obtain the most basic heterogeneous rock mass parameters, and evaluated the stability of the heterogeneous rock mass tunnel. The results showed that when the weak interlayer is randomly distributed, the deformation of the wall increases with the decrease in the average value of the parameters, and it is significantly affected by its standard deviation. The core of the stability evaluation process of the heterogeneous rock mass tunnel is to obtain the radius of the plastic zone and the distribution of weak interlayer. If the distribution characteristics of the interlayer are not determined, the critical deformation may be appropriately reduced by 15% to evaluate the stability of the tunnel. We also verified the reliability of the stability evaluation method by monitoring the 2# diversion tunnel of the Zipingpu hydraulic project.
The influence of the heterogeneity of rock mass for surrounding rock stability evaluation of a tunnel
Li, Guofeng (author) / He, Mingming (author) / Bai, Yue (author)
2023
Article (Journal)
Electronic Resource
English
BKL:
56.00$jBauwesen: Allgemeines
/
38.58
Geomechanik
/
38.58$jGeomechanik
/
56.20
Ingenieurgeologie, Bodenmechanik
/
56.00
Bauwesen: Allgemeines
/
56.20$jIngenieurgeologie$jBodenmechanik
RVK:
ELIB18
Study on Discrete Fracture Network Model and Rock Mass Quality Evaluation of Tunnel Surrounding Rock
| DOAJ | 2024
Back Analysis for Mass Parameters of Tunnel Surrounding Rock
| British Library Conference Proceedings | 2012
Experimental Study on Creep of Surrounding Rock Mass in Argillaceous Soft Rock Tunnel
| British Library Conference Proceedings | 2012