Analysis on Stability of the Expensive Soil Cutting Slope Based on ANSYS

2013 ◽  
Vol 405-408 ◽  
pp. 299-303
Author(s):  
Bo Tan ◽  
Rui Zhang ◽  
Yan Ting Lai
Keyword(s):  
Expansive Soil ◽  
Analysis Method ◽  
Slope Analysis ◽  
Cutting Slope ◽  
Shear Strength Reduction Method ◽  
Earth Slope ◽  
Soil Cutting ◽  
Mechanism Of Landslide ◽  
Serious Disease ◽  
Shear Strength Reduction

Landslide of expansive soil slope is a serious disease and difficult to correct in highway construction. And the mechanism of landslide of expensive soil cutting slope is complex, so the traditional slope analysis method is unable to analyze it to obtain the reasonable explanation. But the numeric analytic method can obtain the stress, strain and plastic zone of side slope analysis the distortion process of earth slope and the latent sliding plane reasonably, adopt the safety factors to evaluate the slope stability, The paper based on ANSYS and adopts the nonlinear and elastoplasticity model of soil, and use the theory of the shear strength reduction method with FEM to analysis the rule of NanYou road expansive soil landslide. Keywords:Expensive soil landslide of cutting slope swelling force FEM

Numerical Simulation and Design Optimization of Anchor Bolt-Sash Girder Support for Expansive Soil Cutting Slope

2015 ◽  
Vol 744-746 ◽  
pp. 547-550
Author(s):  
Hong Zhang ◽  
Guo Jun Sheng ◽  
Wen Qing Wu
Keyword(s):  
Numerical Simulation ◽  
Design Optimization ◽  
Expansive Soil ◽  
Original Design ◽  
Cutting Slope ◽  
Calculation Results ◽  
Soil Cutting ◽  
Anchor Bolts ◽  
The Stability ◽  
Vertical Spacing

The reinforcement of expansive soil cutting slope has been a difficulty for the construction industry. This study selected Wanyi Expressway as the construction background and used finite difference method for the numerical simulation and design optimization of expansive soil cutting slope reinforced by sash girder anchor bolts. Calculation results show that the cutting slope ratio is closely related to the stability of the expansive soil cutting slope and that the length, set angle, and vertical spacing of the anchor bolts significantly influence the deformation of the cutting slope. The original design plan was optimized according to the calculation results, and a positive effect in plan execution was achieved. This study may serve as a reference for other similar construction designs.

scholarly journals Surficial Failure of Expansive Soil Cutting Slope and Its Flexible Support Treatment Technology

2018 ◽  
Vol 2018 ◽  
pp. 1-13 ◽  
Author(s):  
Jie Xiao ◽  
He-ping Yang ◽  
Jun-hui Zhang ◽  
Xian-yuan Tang
Keyword(s):  
Shear Strength ◽  
Expansive Soil ◽  
Treatment Technology ◽  
Flexible Support ◽  
Cutting Slope ◽  
Soil Cutting ◽  
The Stability ◽  
Vital Factor ◽  
Support Treatment ◽  
Drained Shear Strength

The surficial failure of most expansive soil cutting slopes, subjected to the repeated wet-dry cycles, often occurs during or after rainfall following a long drought. The reason for this, however, is still unclear. Therefore, the laboratory tests were conducted to gain the saturated drained shear strength of the natural Nanning expansive soil considering the combined effects of swelling with loading and wet-dry cycles. The findings indicate that the envelope of shear strength, which significantly drops close or equal to zero, can be well fitted by the generalized power function. At the same time, the effect of shear strength parameters on the stability of the expansive soil cutting slope was investigated. The reasons for the shear strength attenuation of the natural expansive soil and the surficial failure of the expansive soil cutting slopes were analyzed. It is evident that the effective cohesion being small is a vital factor influencing the occurrence of surficial failure of an expansion soil slope. Moreover, an effective flexible support treatment measure was provided.

scholarly journals Transport of Zn (II) by TDDA-Polypropylene Supported Liquid Membranes and Recovery from Waste Discharge Liquor of Galvanizing Plant of Zn (II)

2017 ◽  
Vol 2017 ◽  
pp. 1-9 ◽  
Author(s):  
Hanif Ur Rehman ◽  
Gul Akhtar ◽  
Haroon Ur Rashid ◽  
Nauman Ali ◽  
Imtiaz Ahmad ◽  
...  
Keyword(s):  
Metal Ion ◽  
Liquid Membrane ◽  
Feed Solution ◽  
Ion Concentration ◽  
Analysis Method ◽  
Membrane Phase ◽  
Waste Discharge ◽  
Slope Analysis ◽  
Supported Liquid Membranes ◽  
Strongly Agree

The facilitated passage of Zn (II) across flat sheet supported liquid membrane saturated with TDDA (tri-n-dodecylamine) in xylene membrane phase has been investigated. The effect of acid and metal ion concentration in the feed solution, the carrier concentration in membrane phase, stripping agent concentration in stripping phase, and coions on the extraction of Zn (II) was investigated. The stoichiometry of the extracted species, that is, complex, was investigated on slope analysis method and it was found that the complex (LH)2·Zn(Cl2) is responsible for transport of Zn (II). A mathematical model was developed for transport of Zn (II), and the predicted results strongly agree with experimental ones. The mechanism of transport was determined by coupled coion transport mechanism with H+and Cl−coupled ions. The optimized SLM was effectively used for elimination of Zn (II) from waste discharge liquor of galvanizing plant of Zn (II).

Dynamic response and mechanical deformation properties of the soil cutting slope under train cyclic loads

2020 ◽  
Vol 13 (14) ◽  
Author(s):  
Qiang Xie ◽  
Zhi-hui Wu ◽  
Chun-bo He ◽  
Jie Dong ◽  
Zhi-lin Cao ◽  
...  
Keyword(s):  
Dynamic Response ◽  
Mechanical Deformation ◽  
Cyclic Loads ◽  
Cutting Slope ◽  
Deformation Properties ◽  
Soil Cutting

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 Adsorption of lanthanides(III) from aqueous solutions by fullerene black modified with di(2-ethylhexyl)phosphoric acid

2009 ◽  
Vol 7 (1) ◽  
pp. 54-58 ◽  
Author(s):  
A. Turanov ◽  
V. Karandashevb
Keyword(s):  
Synergistic Effect ◽  
Phosphoric Acid ◽  
Aqueous Solutions ◽  
Aqueous Phase ◽  
Atomic Number ◽  
Electric Arc ◽  
Analysis Method ◽  
Sorbent Phase ◽  
Fullerene Black ◽  
Slope Analysis

AbstractFullerene black (FB) - a product of electric arc graphite vaporization after extraction of fullerenes - was modified with the di(2-ethylhexyl)phosphoric acid (D2EHPA). The distribution of D2EHPA between FB and aqueous HNO3 solutions has been studied. The effect of HNO3 concentration in the aqueous phase and that of D2EHPA concentration in the sorbent phase on the adsorption of microquantities of La, Ce, Pr, Nd, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb, Lu, and Y nitrates from HNO3 solutions by D2EHPA-modified FB are considered. The stoichiometry of the sorbed complexes has been determined by the slope analysis method. The efficiency of lanthanides’ adsorption increases with an increase in the element atomic number. A considerable synergistic effect has been observed upon the addition of the neutral bidentate tetraphenylmethylenediphosphine dioxide ligand to D2EHPA in the sorbent phase.

scholarly journals Molten solvent extraction behavior of palladium with 1-phenyl-3-methyl-4-benzoyl-5-pyrazolone at 60 °C

2007 ◽  
Vol 5 (3) ◽  
pp. 912-921 ◽  
Author(s):  
Bo Peng ◽  
Xiaojun Guo ◽  
Xuefen Mao ◽  
Jinzhang Gao
Keyword(s):  
Solvent Extraction ◽  
Precious Metal ◽  
Extraction Efficiency ◽  
Equilibrium Temperature ◽  
Paraffin Wax ◽  
Analysis Method ◽  
Extractant Concentration ◽  
Slope Analysis ◽  
Extraction Behavior ◽  
Ph Range

AbstractThe solvent extraction behavior of precious metal palladium with 1-phenyl-3-methyl-4-benzoyl-5-pyrazone (PMBP) into molten paraffin wax has been studied in the temperature range from 55 to 75 °C. The complex consisting of PMBP and palladium was extracted into molten wax phase in the pH range from 1.0 to 3.5 at 60 °C. The extraction efficiency was up to 97% at the experimental pH. The stoichiometry of the extracted species of palladium was determined on the basis of slope analysis method. The effects of time to achieve equilibrium, temperature, and extractant concentration on the extraction were discussed. The thermodynamic data indicate that the extraction is an endothermic reaction and the increase of temperature promotes the extraction of palladium into molten paraffin wax and the extraction of palladium with PMBP is entropy controlled at high temperatures.

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