Numerical Simulation of Safe Distance between Concealed Karst Cave and Tunnel Based on Shear Strength Reduction Method Safety Factor Catastrophe

2014 ◽  
Vol 501-504 ◽  
pp. 1753-1756
Author(s):  
Yong Biao Lai ◽  
Mang Shu Wang ◽  
Xin Hua You
Keyword(s):  
Numerical Simulation ◽  
Safety Factor ◽  
Reduction Method ◽  
Strength Reduction ◽  
Karst Cave ◽  
Strength Reduction Method ◽  
Safe Distance ◽  
Shear Strength Reduction Method ◽  
Concealed Karst Cave ◽  
Shear Strength Reduction

The numerical simulation method of safe distance between concealed karst cave and tunnel based on shear strength reduction method safety factor catastrophe is proposed. The safety factor of different distance between concealed karst cave and tunnel can be obtained using strength reduction finite element method numerical calculation with the finite element solution non convergence as the standard rock damage, then compare the safety factor of different distance, the catastrophe of safety factor corresponding to the distance is the safe distance between concealed karst cave and tunnel, and the plastic zone of rock stratum between concealed karst cave and tunnel is reaching run-through state, which is verified by engineering example.

scholarly journals Numerical analysis of landslide next regional route No. 975 in Borowa before and after securing it

2018 ◽  
Vol 19 (6) ◽  
pp. 202-206
Author(s):  
Elżbieta Pilecka ◽  
Magdalena Moskal
Keyword(s):  
Numerical Simulation ◽  
Numerical Analysis ◽  
Reduction Method ◽  
Strength Reduction ◽  
Strength Reduction Method ◽  
Security Measures ◽  
Road Engineering ◽  
Shear Strength Reduction Method ◽  
Before And After ◽  
Shear Strength Reduction

In the paper the problem of landslides in road engineering is discussed. An example is given of a landslide next to regional road No. 975 in Borowa. The analysed slope was modeled in the MIDAS GTS NX . The slope stability analysis and the FoS coefficient were carried out using the shear strength reduction method (SRM). In the next step a numerical analysis was carried out after the security measures were implemented. The results show the capability of numerical simulation programs.

Numerical Analysis of a Slope Stabilized with Anchors

2012 ◽  
Vol 479-481 ◽  
pp. 841-844 ◽  
Author(s):  
Shu Wei Sun ◽  
Jia Chen Wang ◽  
Zhong Ping Zhang
Keyword(s):  
Reduction Method ◽  
Slip Surface ◽  
Three Dimensional ◽  
Strength Reduction ◽  
Strength Reduction Method ◽  
Interface Elements ◽  
Shearing Resistance ◽  
Shear Strength Reduction Method ◽  
The Stability ◽  
Shear Strength Reduction

The three-dimensional shear strength reduction method is used to evaluate the stability of an idealized slope stabilized with anchors, where the soil-anchor interaction is simulated by zero-thickness three-dimensional interface elements, and the effects of the direction angle, position, spacing on the slope stability are numerical studied. The results show that the reinforcing mechanisms of anchors in slopes are to increase the shearing resistance on the slip surface，and the failure mechanism, predicted by SSR, agrees well with the critical slip circle given by Bishop’s simplified method. The better stabilizing effects can be obtained when the anchors are installed with a small angle between the anchor and the horizontal direction, and slightly closer to the slope toe.

An Analysis of Slope Stability of Sand Embankment with Shear Strength Reduction (SSR) Method

2010 ◽  
Vol 152-153 ◽  
pp. 1017-1023 ◽  
Author(s):  
Shu Tang Liu ◽  
Wei Dong Cao ◽  
Ying Yong Li ◽  
Yong Shun Yang
Keyword(s):  
Slope Stability ◽  
Safety Factor ◽  
Reduction Method ◽  
Strength Reduction ◽  
Land Resource ◽  
Strength Reduction Method ◽  
Side Slope ◽  
Content Ratio ◽  
The Stability ◽  
Shear Strength Reduction

Comparing with conventional expressway embankment filled with clay only, the sand embankment tipped by intensely-weathered rock (IWR) can effectively reduce the consumption of cultivated land resource caused by the construction of expressway engineering. So it is significant to research the constructions of sand embankment tipped by IWR if local sand resources are enough. Combined with the construction of Qing-Lin freeway, in China, the slope stability of the embankment filled with sand and tipped by IWR outside was analyzed in the paper, and the analysis was conducted by the strength reduction method. The effects of the changes of compaction, water content, ratio of slope, height of the embankment and different IWR-width on the safety factor of the slope stability were investigated. The results indicate that, when the height of embankment is constant, the ratio of slope is the most important factor which influences the stability of side slope, and the IWR-width does not have a decisive effect on the safety factor on subsoil condition and it can be determined according to the convenience of site construction.

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