Analogical model test and theoretical analysis on zonal disintegration based on filed monitoring in deep tunnel

2013 ◽  
Vol 17 (sup1) ◽  
pp. s33-s52 ◽  
Author(s):  
Xu-Guang Chen ◽  
Yuan Wang ◽  
Qiang-Yong Zhang ◽  
Shu-Cai Li ◽  
Erling Nordlund
Keyword(s):  
Theoretical Analysis ◽  
Model Test ◽  
Zonal Disintegration ◽  
Deep Tunnel ◽  
Analogical Model

Numerical Tests of Tunnel Reinforcing Influences on Zonal Disintegration within Rockmass around Deep Tunnel

2011 ◽  
Vol 261-263 ◽  
pp. 1282-1286
Author(s):  
Yu Jun Zuo ◽  
Yong Bin Zhang ◽  
Shu Cai Li ◽  
Yi Ping Zhang ◽  
Chun Chun Chen
Keyword(s):  
Failure Process ◽  
Vertical Wall ◽  
Three Dimensional ◽  
General Nature ◽  
Zonal Disintegration ◽  
Deep Tunnel ◽  
Tunnel Wall ◽  
Numerical Tests ◽  
Zonal Disintegration Phenomenon ◽  
The Stability

Nnumerical tests on three-dimensional failure process of rock samples containing vertical wall semi-arched tunnel with and without reinforcing are carried out with Mechsoft’s RFPA-Parallel system running on Lenovo 1800 Cluster, reproducing zonal disintegration phenomenon within rockmass around deep tunnels, and then the deep tunnel reinforcing influences on zonal disintegration within rockmass around tunnel is analyzed. Numerical results indicate that deep tunnel reinforcing does not change the general nature to form zonal disintegration phenomenon, but it can improve the stability of the tunnel wall.

Design of New Small Hydroelectric Device

2012 ◽  
Vol 472-475 ◽  
pp. 883-886
Author(s):  
Li Zhen Zhang ◽  
Xiao Long Cao ◽  
Jun Tao Li ◽  
Shu Lei Wu
Keyword(s):  
Theoretical Analysis ◽  
Water Resource ◽  
Model Test ◽  
High Efficiency ◽  
New Device ◽  
Design Scheme ◽  
Force And Motion ◽  
Technological Characteristics ◽  
Working Principle

The paper designed a new small hydroelectric device after analyzing the technological characteristics and the deficiency of the existing hydropower. As a supplement of conventional power, the device can be used in the places that have no conditions to build dams but have a lot of water resource. The new device working principle was introduced and the analysis of its force and motion was made. The design scheme is proved feasibility through theoretical analysis. The model test indicates that this new hydroelectric device has high efficiency.

Model Test for a New Chorded Arch Bridge

2011 ◽  
Vol 255-260 ◽  
pp. 1061-1064
Author(s):  
Yan Mei Gao ◽  
Zhi Xiang Zhou
Keyword(s):  
Experimental Data ◽  
Theoretical Analysis ◽  
Model Test ◽  
Organic Glass ◽  
Bridge Design ◽  
Arch Bridge ◽  
Construction Scheme ◽  
New Knowledge ◽  
Mechanical Performances ◽  
Design And Construction

A new chorded arch bridge is put forward by Professor Zhixiang zhou of Chongqing Jiaotong University. For further exploration by the bridge design and construction scheme of the feasibility and rationality, and to verify the correctness of the theoretical analysis and probe the effective measures to deal with the closure error during in the rotating construction, a model made with by organic glass (ratio of the model to original bridge is 1/10) is has been experimented. In this test, the rotating down procedure of the construction was simulated and studied, possible closure errors were tested and corresponding measures are proposed, and the mechanical performances at key stages of construction and service were examined. Plentiful experimental data and some new knowledge about the chorded arch bridge were obtained from this test, which provided reliable technical guarantee for the actual construction.

Theoretical analysis and model test for rainfall-induced shallow landslides in the red-bed area of Sichuan

2017 ◽  
Vol 77 (4) ◽  
pp. 1343-1353 ◽  
Author(s):  
L. Z. Wu ◽  
L. M. Zhang ◽  
Y. Zhou ◽  
Q. Xu ◽  
B. Yu ◽  
...  
Keyword(s):  
Theoretical Analysis ◽  
Model Test ◽  
Shallow Landslides ◽  
Red Bed

scholarly journals Model Test of Anchoring Effect on Zonal Disintegration in Deep Surrounding Rock Masses

2013 ◽  
Vol 2013 ◽  
pp. 1-16 ◽  
Author(s):  
Xu-Guang Chen ◽  
Qiang-Yong Zhang ◽  
Yuan Wang ◽  
De-Jun Liu ◽  
Ning Zhang
Keyword(s):  
Model Test ◽  
Surrounding Rock ◽  
Zonal Disintegration ◽  
Formation Condition ◽  
Anchor Effect ◽  
Rock Masses ◽  
Tunnel Excavation ◽  
Anchoring Effect ◽  
Tension And Compression ◽  
Deep Rock

The deep rock masses show a different mechanical behavior compared with the shallow rock masses. They are classified into alternating fractured and intact zones during the excavation, which is known as zonal disintegration. Such phenomenon is a great disaster and will induce the different excavation and anchoring methodology. In this study, a 3D geomechanics model test was conducted to research the anchoring effect of zonal disintegration. The model was constructed with anchoring in a half and nonanchoring in the other half, to compare with each other. The optical extensometer and optical sensor were adopted to measure the displacement and strain changing law in the model test. The displacement laws of the deep surrounding rocks were obtained and found to be nonmonotonic versus the distance to the periphery. Zonal disintegration occurs in the area without anchoring and did not occur in the model under anchoring condition. By contrasting the phenomenon, the anchor effect of restraining zonal disintegration was revealed. And the formation condition of zonal disintegration was decided. In the procedure of tunnel excavation, the anchor strain was found to be alternation in tension and compression. It indicates that anchor will show the nonmonotonic law during suppressing the zonal disintegration.

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