Permeability stability calculation model of foam‐conditioned soil based on the permeability constant

2020 ◽  
Author(s):  
Shuying Wang ◽  
Shuo Huang ◽  
Jiazheng Zhong ◽  
Sheng Zhang ◽  
Qinxin Hu ◽  
...  
Keyword(s):  
Calculation Model ◽  
Stability Calculation ◽  
Permeability Constant

scholarly journals Stability Calculation Method of Slope Reinforced by Prestressed Anchor in Process of Excavation

2014 ◽  
Vol 2014 ◽  
pp. 1-7 ◽  
Author(s):  
Zhong Li ◽  
Jia Wei ◽  
Jun Yang
Keyword(s):  
Slope Stability ◽  
Slip Surface ◽  
Calculation Model ◽  
Design Parameters ◽  
Search Model ◽  
Critical Slip Surface ◽  
Stability Calculation ◽  
Optimal Stability ◽  
Dynamic Search ◽  
Prestressed Anchor

This paper takes the effect of supporting structure and anchor on the slope stability of the excavation process into consideration; the stability calculation model is presented for the slope reinforced by prestressed anchor and grillage beam, and the dynamic search model of the critical slip surface also is put forward. The calculation model of the optimal stability solution of each anchor tension of the whole process is also given out, through which the real-time analysis and checking of slope stability in the process of excavation can be realized. The calculation examples indicate that the slope stability is changed with the dynamic change of the design parameters of anchor and grillage beam. So it is relatively more accurate and reasonable by using dynamic search model to determine the critical slip surface of the slope reinforced by prestressed anchor and grillage beam. Through the relationships of each anchor layout and the slope height of various stages of excavation, and the optimal stability solution of prestressed bolt tension design value in various excavation stages can be obtained. The arrangement of its prestressed anchor force reflects that the layout of the lower part of bolt and the calculation of slope reinforcement is in line with the actual. These indicate that the method is reasonable and practical.

scholarly journals Shallow stability and parameter sensitivity analysis of soil slope with frame protection under rainfall seepage

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Jifeng Lian ◽  
Jiujiang Wu
Keyword(s):  
Sensitivity Analysis ◽  
Construction Material ◽  
Calculation Model ◽  
Frame Structure ◽  
Orthogonal Experimental Design ◽  
Soil Slope ◽  
Cross Sectional ◽  
Stability Calculation ◽  
Rectangular Frame ◽  
Rainfall Seepage

AbstractFrame protection is a commonly used solution to maintain the shallow stability of soil slope under rainfall seepage. Currently, the frame structure's design is empirical, and its theoretical analysis method considering the influence of seepage is scarce. Based on the instability model of the infinite slope, the shallow stability calculation model of soil slope under the rectangular frame protection is established in this paper. The calculation results show that it is beneficial to maintain the shallow slope stability by reducing the skeleton spacing and increasing the cross-sectional size of the frame structure. Also, geometric parameters' sensitivity analysis of the frame structure is carried out based on the orthogonal experimental design methods. Therein, an optimal scheme evaluation function was constructed to balance the relationship between the safety factor and the construction material consumption. The calculation model and results included in this paper can guide the design of the rectangular frame protection to soil slope under rainfall seepage.

scholarly journals Slope stability analysis under rainfall conditions considering unsaturated characteristics of materials

2020 ◽  
Vol 165 ◽  
pp. 03030
Author(s):  
Sha Wang ◽  
Guodong Mei ◽  
Xuyang Xie ◽  
Li Yaoxuan ◽  
Lu Yao
Keyword(s):  
Slope Stability ◽  
Safety Management ◽  
Limit Equilibrium ◽  
Extreme Rainfall ◽  
Calculation Model ◽  
Mine Safety ◽  
Stability Calculation ◽  
Safety Coefficient ◽  
Practical Engineering ◽  
Seepage Theory

As one of the important facilities in mines, the dump has become one of the major hidden dangers of mine safety management due to its large volume and loose structure. In this paper, based on unsaturated seepage theory of soil and practical engineering slope cases, the slope stability calculation model based on Bishop limit equilibrium method is established. This paper analyzes and calculates the evolution law of slope stability under extreme rainfall, obtains the law of slope stability safety coefficient changing with rainfall under unsaturated characteristics, and puts forward the corresponding countermeasures.

Equivalent Analysis of Elastic Constants and Stability Calculation of Corrugated-Arch Metal Roof

2012 ◽  
Vol 542-543 ◽  
pp. 106-110
Author(s):  
Li Tong Sun ◽  
Le Su Lin
Keyword(s):  
Elastic Constants ◽  
Calculation Model ◽  
The Finite Element Method ◽  
Orthotropic Plates ◽  
Accurate Analysis ◽  
Stability Calculation ◽  
Factors Affecting ◽  
Overall Stability ◽  
The Stability ◽  
Simplified Calculation

Corrugated-arch Metal Roof has anisotropic properties because of transverse small corrugations covering the surface of the structure. Thus the panels should be considered as orthotropic plates for more accurate analysis. Based on the principle of stressed skin diaphragm, elastic constants of Corrugated-arch Metal Roof with corrugations are analyzed using equivalent methods; the formulas for equivalent elastic constants are produced and the simplified calculation model is established. The stability of the structure is analyzed and evaluated by use of the finite element method. The results are compared with experimental results, and the method of equivalent analysis is validated. The results indicate that the theoretical bearing capacity is determined by overall stability under full-span and half-span loading without considering the initial defects. Through the equivalent analysis, the length and depth of corrugations are main factors affecting the equivalent elastic constants. Design recommendations are finally presented.

A fuzzy neural network approach for modeling the growth kinetics of FeB and Fe2B layers during the boronizing process

2018 ◽  
Vol 106 (6) ◽  
pp. 603 ◽  
Author(s):  
Bendaoud Mebarek ◽  
Mourad Keddam
Keyword(s):  
Neural Network ◽  
Experimental Data ◽  
Fuzzy Neural Network ◽  
Treatment Time ◽  
Calculation Model ◽  
Average Error ◽  
Network Approach ◽  
Neural Network Approach ◽  
Fuzzy Neural ◽  
Kinetics Of

In this paper, we develop a boronizing process simulation model based on fuzzy neural network (FNN) approach for estimating the thickness of the FeB and Fe2B layers. The model represents a synthesis of two artificial intelligence techniques; the fuzzy logic and the neural network. Characteristics of the fuzzy neural network approach for the modelling of boronizing process are presented in this study. In order to validate the results of our calculation model, we have used the learning base of experimental data of the powder-pack boronizing of Fe-15Cr alloy in the temperature range from 800 to 1050 °C and for a treatment time ranging from 0.5 to 12 h. The obtained results show that it is possible to estimate the influence of different process parameters. Comparing the results obtained by the artificial neural network to experimental data, the average error generated from the fuzzy neural network was 3% for the FeB layer and 3.5% for the Fe2B layer. The results obtained from the fuzzy neural network approach are in agreement with the experimental data. Finally, the utilization of fuzzy neural network approach is well adapted for the boronizing kinetics of Fe-15Cr alloy.

Development of the Partial Discharge Inception Calculation Model in a Non-uniform Air Gap Considering the Effect of Humidity

2011 ◽  
Vol 131 (12) ◽  
pp. 1017-1023 ◽  
Author(s):  
Norihito Yanagita ◽  
Tatsuro Kato ◽  
Toshiaki Rokunohe ◽  
Takeshi Iwata ◽  
Hiroki Kojima ◽  
...  
Keyword(s):  
Partial Discharge ◽  
Calculation Model ◽  
Air Gap

Regression analysis of indicators of a numerical experiment to determine the cooling time of oil

2020 ◽  
pp. 89-97
Author(s):  
A. U. Yakupov ◽  
D. A. Cherentsov ◽  
K. S. Voronin ◽  
Yu. D. Zemenkov
Keyword(s):  
Regression Analysis ◽  
Computer Experiment ◽  
Calculation Model ◽  
Cooling Time ◽  
Regression Coefficients ◽  
Fisher Criterion ◽  
Empirical Relationships ◽  
Factors Affecting ◽  
Oil Pipeline ◽  
Significant Regression

The article performed the processing of the results of a computer experiment to determine the cooling time of oil in a stopped oil pipeline. We proposed a calculation model in previous works that allows you to simulate the process of cooling oil.There was a need to verify the previously obtained results when conducting a laboratory experiment on a stand with soil. To conduct the experiment, it was necessary to conduct the planning of the experiment. The factors affecting the cooling time of oil in the oil pipeline, which will vary in the proposed experiment, are determined, empirical relationships are established. A regression analysis was carried out, and the dispersion homogeneity was checked using the Cochren criterion. The estimates of reproducibility variances are calculated. The adequacy hypothesis was tested using the Fisher criterion. Significant regression coefficients are established.

Sign in / Sign up

Export Citation Format

Share Document