Numerical Simulation Study on the Failure Mechanism of Bedding Rock Slope Based on the Lagrangian Multiplier Method

2014 ◽  
Vol 513-517 ◽  
pp. 2603-2606
Author(s):  
Fei Yu ◽  
Yu Zhang ◽  
Shan Xiong Chen ◽  
Jian Li
Keyword(s):  
Rock Slope ◽  
Mechanical Response ◽  
Contact Friction ◽  
Lagrangian Multiplier ◽  
Weak Formulation ◽  
Discrete Equations ◽  
Contact Constraint ◽  
The Status ◽  
Lagrangian Multiplier Method ◽  
Bedding Rock Slope

The weak formulation of the Lagrangian control equations considering the contact constraint conditions and the FEM discrete equations have been derived. The non-linear and non-smooth problems of the mechanical response are solved perfectly by adopting the suggestion method for which tolerance large tangential slipping of the contact surface. One excavation bedding rock slope of the Hu-Rong-Xi expressway is analyzed applying the method mentioned above. The distribution rules of the displacement, stress, strain, contact state, contact friction force and sliding distance under the status of critical sliding are obtained. The analysis results indicate that the failure of the bedding slope is a progressive course. The interlayer stagger firstly, then the deformation evaluates to creep bedding slip and the bottom rock occurs buckling slip at last. The destruction model changes form the bedding slide to rock buckling slip.

Lagrangian Multiplier Method

2014 ◽  
pp. 33-37 ◽  
Author(s):  
Sinniah Ilanko ◽  
Luis E. Monterrubio ◽  
Yusuke Mochida
Keyword(s):  
Multiplier Method ◽  
Lagrangian Multiplier ◽  
Lagrangian Multiplier Method

scholarly journals Comprehensive Method to Test the Stability of High Bedding Rock Slop Subjected to Atomized Rain

2020 ◽  
Vol 10 (5) ◽  
pp. 1577
Author(s):  
Zheng-jun Hou ◽  
Bao-quan Yang ◽  
Lin Zhang ◽  
Yuan Chen ◽  
Geng-xin Yang
Keyword(s):  
Slope Failure ◽  
Rock Slope ◽  
Evaluation Method ◽  
Failure Modes ◽  
Similarity Theory ◽  
Fem Simulation ◽  
Strength Reduction ◽  
Comprehensive Method ◽  
The Stability ◽  
Bedding Rock Slope

In the construction of high dams, many high rock slope failures occur due to flood discharge atomized rain. Based on the steel frame lifting technique and strength reduction materials, a comprehensive method is proposed in this paper to study the stability of high bedding rock slope subjected to atomized rain. The safety factor expression of the comprehensive method and the evaluation method for deformation instability were established according to the similarity theory of geomechanical model, failure criterion, and mutation theory. Strength reduction materials were developed to simulate the strength reduction of structural planes caused by rainfall infiltration. A typical test was carried out on the high bedding rock slope in the Baihetan Hydropower Station. The results showed that the failure modes of the bedding rock slope were of two types: sliding–fracturing and fracturing–sliding. The first slip block at the exposed place of the structural plane was sliding–fracturing. Other succeeding slip blocks were mainly of the fracturing–sliding type due to the blocking effect of the first slip block. The failure sequence of the slip blocks along the structural planes was graded into multiple levels. The slip blocks along the upper structural planes were formed first. Concrete plugs had effective reinforcement to improve the shear resistance of the structural planes and inhibit rock dislocation. Finite element method (FEM) simulation was also performed to simulate the whole process of slope failure. The FEM simulation results agreed well with the test results. This research provides an improved understanding of the physical behavior and the failure modes of high bedding rock slopes subjected to atomized rain.

The Study of Failure Status and Treatment Methods of Open-Mining Rock Slope in Chongqing

2013 ◽  
Vol 353-356 ◽  
pp. 1297-1302
Author(s):  
Zhong Guo Zhao ◽  
Pei Ling Zhao ◽  
Xiao Long Wu ◽  
Chun Lei Xu
Keyword(s):  
Rock Slope ◽  
Treatment Method ◽  
Theory And Practice ◽  
Treatment Methods ◽  
Failure Patterns ◽  
Sustainable Environment ◽  
Rock Structure ◽  
The Status ◽  
Pros And Cons ◽  
Secondary Disasters

Open-mining forms high steep rock slope, slope stability is affected by geological environment, structure, stratum, lithology, hydro-geology, rock structure, structural plane appearance, slope azimuth with spatial combination relations. After mining the bared slope with weathering, due to heavy rainfall, earthquake and other factors causes secondary disasters and serious impact on people's life and property safety. This paper is based on a comprehensive investigation, statistic and classification of the status quo and failure patterns of the rock slope and treatment method is simulated and analyzed, pros and cons of various treatment methods were compared, to provide the decision-making reference for similar mines management, and basis of theory and practice , to build green mines and sustainable environment.

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