Intelligent prediction of surrounding rock deformation of shallow buried highway tunnel and its engineering application

2019 ◽  
Vol 90 ◽  
pp. 1-11 ◽  
Author(s):  
Shaoshuai Shi ◽  
Ruijie Zhao ◽  
Shucai Li ◽  
Xiaokun Xie ◽  
Liping Li ◽  
...  
Keyword(s):  
Engineering Application ◽  
Surrounding Rock ◽  
Rock Deformation ◽  
Highway Tunnel ◽  
Surrounding Rock Deformation

The Study on Tunnel Surrounding Rock Displacement Prediction

2013 ◽  
Vol 340 ◽  
pp. 85-89
Author(s):  
Wen Sheng Shen
Keyword(s):  
Engineering Application ◽  
Surrounding Rock ◽  
Rock Deformation ◽  
Analysis Method ◽  
Displacement Prediction ◽  
Nonlinear Fitting ◽  
Deformation Law ◽  
Prediction Technique ◽  
Final Deformation ◽  
Surrounding Rock Deformation

The traditional regression analysis method cant effectively predict the final deformation of divisional excavation. This paper is going to propose prediction technique of piecewise nonlinear fitting according to deformation law of surrounding rock displacement during divisional tunneling, to construct piecewise nonlinear fitting function. Through comparative analysis in engineering application, it is proved that it can better meet the prediction need for surrounding rock deformation during information zing construction with its higher accurate prediction and correlation coefficient.

Numerical Analysis of Deformation Influence of Horizontal Adit Construction on Main Tunnel Intersection Structure

2012 ◽  
Vol 204-208 ◽  
pp. 1514-1517
Author(s):  
Zhi Jie Sun
Keyword(s):  
Finite Element ◽  
Numerical Analysis ◽  
Stress Concentration ◽  
Surrounding Rock ◽  
Rock Deformation ◽  
3D Finite Element ◽  
Arching Effect ◽  
Highway Tunnel ◽  
Element Simulation ◽  
Surrounding Rock Deformation

The 3D finite element simulation are adopted to study the surrounding rock deformation regularity of main tunnel during the horizontal adit construction stage．The Zhongtiaoshan highway tunnel is taken as an example. The research results are shown as follows：Horizontal adit excavation destroys the original arching effect of the main tunnel, which leads to stress concentration at the intersection of primary supporting structure. The first excavation step plays an important play in the surrounding rock deformation of the intersection. The influence range of the main tunnel which due to the horizontal adit excavation is 1.2D.

scholarly journals Discussion On The Optimization of Circumferential Distance Of The System Bolt In A Highway Tunnel

2021 ◽  
Vol 272 ◽  
pp. 02013
Author(s):  
Kun Wang ◽  
Shun Yu ◽  
Yong Pan ◽  
Lushi Wang
Keyword(s):  
Numerical Simulation ◽  
Measurement Data ◽  
Surrounding Rock ◽  
Rock Deformation ◽  
Tunnel Structure ◽  
Highway Tunnel ◽  
Before And After ◽  
Monitoring And Measurement ◽  
Bolt Spacing ◽  
Surrounding Rock Deformation

The setting of circumferential distance of system anchor rod in highway tunnel is related to the safety of tunnel structure, and also affects the project cost. The “code for design of highway tunnels” issued in 2018 also adjusted the circumferential spacing arrangement of the system bolts of the tunnel. Based on a highway tunnel project, the circumferential spacing of system bolts in deep buried section of grade V surrounding rock is adjusted from 0.8m to 1.2m, and the numerical simulation and comparative analysis before and after the optimization of bolt spacing are carried out. The field monitoring and measurement data show that the surrounding rock deformation after adjustment has little effect, and the cavern is stable as a whole, which can guide the optimization implementation of subsequent sections.

scholarly journals Model Test and Numerical Study on Surrounding Rock Deformation and Overburden Strata Movement Law of Gob-Side Entry Retaining via Roof Cutting

Minerals ◽  
2020 ◽  
Vol 10 (5) ◽  
pp. 458 ◽  
Author(s):  
Daoyong Zhu ◽  
Jiong Wang ◽  
Weili Gong ◽  
Zheng Sun
Keyword(s):  
Model Test ◽  
Surrounding Rock ◽  
Rock Deformation ◽  
Shanxi Province ◽  
Beam Model ◽  
Physical Test ◽  
Strata Movement ◽  
Deformation Equation ◽  
Surrounding Rock Deformation ◽  
Overlying Strata

The effects of roof cutting techniques on the movement law of the overlying strata and deformation features of the surrounding rock in gob-side entry retaining mines were studied using 200 working faces of the Dianping coal mine in Shanxi Province. Using a mechanical analysis, a cantilever beam model formed by roof cutting was used to derive a deformation equation. The physical model test based on the field prototype revealed an asymmetrically distributed displacement curve and reduced collapse displacement when the rock stratum was far from the cutting seam. Outside of the roof cutting height, the collapse of the overlying strata gradually reached a symmetric distribution with increasing height. The deformation of the retained roadway was mainly concentrated on the roof, and the maximum deformation was 14 mm near the roof cutting side. A numerical simulation of the original size of the model test proved that the laws of strata movement and surrounding rock deformation were consistent with the physical test results. Finally, field measurements were performed, which verified the rationality of this study.

Study on the Deformation Forecasting for the Tunnel Surrounding Rock Using the Neural Network

2013 ◽  
Vol 353-356 ◽  
pp. 828-832
Author(s):  
Guo Feng Wang ◽  
Wen Zhao ◽  
Yong Ping Guan ◽  
Lei Liang
Keyword(s):  
Neural Network ◽  
Maximum Error ◽  
Mining Area ◽  
Surrounding Rock ◽  
Rock Deformation ◽  
The Neural Network ◽  
Sublevel Caving ◽  
Iron Mine ◽  
Set Up ◽  
Surrounding Rock Deformation

The non-pillar sublevel caving method is used in Iron Mine in Banshi. In the mining area, there are many folds and faults, the inclination of ore body changes greatly, and ore and rock are fragmentized. The tunnel often collapsed and the surrounding rock deformation was getting large during the construction stage. Using the data of tunnel surrounding rock deformation, we adopt the neural network method to set up the mapping relation between the tunnel surrounding rock deformation and the project factors, including tunnel deepness, tunnel dimension, measuring time and surrounding rock quality. The analyzing results show that the maximum error between the forecast and the testing data is 13%, which indicates that this method is useful and feasible to the mining engineering. Key words: rock pressure; measure, deformation of the tunnel surrounding rock; neural network; data normalization; mapping

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