Study on the Evaluation Method of Subgrade Slope Green Protection Effect in Dry-Hot Valley of Sichuan-Tibet Railway

Bao, Xueying; Li, Haiwen

doi:10.1155/2020/7159582

Cited by 8 publications

(4 citation statements)

References 26 publications

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“…According to the engineering information of each scheme, experts should employ linguistic fuzzy numbers to evaluate the qualitative indicators in the quantitative transformation. According to the characteristics of the qualitative indicators [39], the scale of linguistic fuzzy numbers is appropriately divided into seven levels. The linguistic scale set of cost indicators is represented by S 1 = {Very small, Smaller, Small, Average Large, Larger, Very large}, while the linguistic scale set of benefit indicators is specified by S 2 = {Very bad, Worst, Bad, Average, Good, Better, Very good}.…”

Section: Interval Quantification Of the Qualitative Indicatorsmentioning

confidence: 99%

An Optimization Model for a Desert Railway Route Scheme Based on Interval Number and TOPSIS

et al. 2022

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The construction of desert railways inevitably destructs the environment and aggravates the wind–sand damage along the line. A reasonable railway route is an effective measure to avoid blown sand hazards, save construction costs, and reduce environmental damage. Currently, the selection methods for the railway route scheme are to analyze the qualitative indicators and quantitative indicators separately, and there are few decision-making models for the desert railway scheme. Therefore, this study aims to propose a comprehensive quantitative optimization model of the route scheme for the desert railway. Based on the design principles of hazard reduction, the evaluation index system of the desert railway route is first constructed, including railway design factors, wind-blown sand hazard factors, environmental impact factors, and operation condition factors. Subsequently, the subjective weights and objective weights are combined to obtain the comprehensive weights of the index by utilizing the principle of minimum discrimination information. Finally, the interval number is employed to quantify the linguistic fuzzy number of qualitative indicators, and the optimization model of the route scheme for the desert railway is constructed based on the technique for order preference by similarity to an ideal solution (TOPSIS). The model is verified using the Minfeng-Yuhu section in the Hotan–Ruoqiang railway as the case study. The achieved results reveal that this model enhances the accuracy and efficiency of the railway scheme decision-making and provides a theoretical basis for the optimal design and sand damage control of the desert railway.

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Section: Interval Quantification Of the Qualitative Indicatorsmentioning

confidence: 99%

An Optimization Model for a Desert Railway Route Scheme Based on Interval Number and TOPSIS

et al. 2022

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“…e cloud model combines the characteristics of fuzziness and probability theory and can evaluate from many aspects. It has been widely used in many fields such as ecological remediation [16], quality evaluation [17,18], image processing [19], and data mining [20]. Based on the research status, this paper takes the Zhongwei sand-crossing section of the Wu-Ma Expressway as the research object and the Tengger Desert as the research background and makes an evaluation of the ecological environment along different road schemes from the damage degree and the remediation costs.…”

Section: Introductionmentioning

confidence: 99%

Study on Ecological Risk Evaluation and Optimum Selection of Desert Expressway Schemes Based on the Two-Dimensional Cloud Model

Han

Liu

et al. 2022

Mathematical Problems in Engineering

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Aimed at the fragile ecological environment in desert, once the resources along routes are destroyed, it will be difficult to restore the original ecological equilibrium in a short time. This paper studies the ecological-equilibrium-oriented risk evaluation of desert motorway schemes in order to choose route schemes reasonably and prevent the sandstorm aggravation caused by ecological damage. Having insight into the special geographical environment and road construction characteristics of Tengger Desert, the research establishes an index system for the ecological risk evaluation in desert areas from five aspects: the interference of living environment of animals and plants, the destruction of natural ecological landscapes, the pollution of water and soil resources, the development and utilization of natural resources, and the sand fixation of plants and the subsequent maintenance; then it confirms each evaluation index’s weight by using the set-valued statistics method to transform the description of the evaluation indexes to an interval value and furthermore determines the comprehensive ecological risk evaluation level of the route scheme in virtue of the two-dimensional cloud image MATLAB outputs which takes the ecological damage and remediation cost as the basic variables. By constructing the model under the method above, the ecological risk evaluations of two route schemes in Zhongwei sand crossing section of Wuhai-Maqin Expressway have been made. The result shows that the western route scheme’s evaluation grade is “good,” is better than the southern route scheme, is within the scope of acceptable risk, agrees with the practical project condition, and verifies the applicability and effectiveness of the model for ecological risk evaluation in desert areas.

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“…With the increasingly stringent environmental requirements, plant-based slope ecological protection technology has attracted more and more attention. Ecological interventions have been proven an effective method to improve the erosion resistance of slopes 6 , 7 , including artificial turf, soil spraying and planting bags, etc., 8 – 10 . However, in the early stage of plant germination and growth, the roots and leaves have not been completely covered on the whole slope, and cannot form effective protection for the slope.…”

Section: Introductionmentioning

confidence: 99%

Mechanical properties and mechanism of soil treated with nano-aqueous adhesive (NAA)

Huang

Lai

et al. 2022

Sci Rep

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The loose structure and low mechanical strength of the surface soil make it vulnerable to damage under erosion conditions. Slope ecological protection is one of the effective methods to improve the stability of slope soil. Although it has been proved that polymer modified materials can effectively improve the soil properties and the environmental protection effect of slope, so far, the improvement mechanism has not been fully understood, especially the chemical mechanism of the material on the enhancement of soil mechanical properties is not clear. In the present study, the effects of nano-aqueous adhesive (NAA) on unconfined compressive strength, shear strength and aggregate characteristics of soil were studied by a series of laboratory experiments. The results show that NAA can increase the strength, aggregate number and stability of the soil, to effectively improve the stability of surface soil. In addition, through infrared spectroscopy and SEM test, it was found that NAA molecules were mainly distributed in the interlayer position of flaky clay minerals, mainly connected with clay minerals through hydrogen bonds, thereby effectively enhancing the cohesion of soil particles.

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Study on the Evaluation Method of Subgrade Slope Green Protection Effect in Dry-Hot Valley of Sichuan-Tibet Railway

Cited by 8 publications

References 26 publications

An Optimization Model for a Desert Railway Route Scheme Based on Interval Number and TOPSIS

An Optimization Model for a Desert Railway Route Scheme Based on Interval Number and TOPSIS

Study on Ecological Risk Evaluation and Optimum Selection of Desert Expressway Schemes Based on the Two-Dimensional Cloud Model

Mechanical properties and mechanism of soil treated with nano-aqueous adhesive (NAA)

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