Evaluation and research on the resource and environmental impact effects of railway tunnel engineering in mountainous areas
The complex geology,sensitive environment,and fragile ecology in mountainous areas make railway tunnel construction difficult,and face great requirements in resource conservation and environmental protection.Green design,as a leading link in green construction,plays a key leading role in reducing the disturbance of tunnel construction on resources and environment,and achieving the goal of resource conservation and environmental friendliness.To quantitatively evaluate the level of resource and environmental impact effects of railway tunnel engineering in mountainous areas and measure the green degree of tunnel design,a method for analyzing the resource and environmental impact effects of railway tunnel engineering in mountainous areas was proposed.First,based on the"Driving force-State-Response"model,with tunnel design parameters as the driving force indices,resource and environmental conditions as the status indices,and tunnel design measures as the response indices,a resource and environmental effect evaluation index system for railway tunnel engineering in mountainous areas was constructed,and grading standards for each index were established.Second,a support vector regression model with self-learning and self-adjusting ability was used to evaluate the level of resource and environmental effects of tunnel engineering.Once again,by taking driving force indices and response indices as the analysis objects,the sensitivity analysis method considering the correlation relationship and superposition effects among indices was used to identify tunnel design factors that have important impacts on the optimization of resource and environmental impact effects in tunnel engineering.Finally,by taking a railway tunnel engineering in a mountainous area as an example,it is obtained that the level of resources and environment of the tunnel engineering is 4.715 7,and the corresponding grade is good,indicating that the green design level of the tunnel engineering is good,the intensive and economical utilization of resources is reasonable,and the environmental protection is strong,which can provide reference for the green design of tunnel engineering under other similar conditions.In addition,the analysis results show that the grouting reinforcement effect is the most sensitive factor leading to changes in the resource and environmental effects of the tunnel engineering,followed by the proportion of clean and sewage diversion.Optimization design can be focused on these two aspects to further optimize the resource and environmental effects of the tunnel engineering.The research results validate the applicability and operability of the research method in this article,which can provide scientific basis for evaluating the resource and environmental impact effects of railway tunnel engineering in mountainous areas and clarify the direction of tunnel engineering optimization design.
railway tunnel engineering in mountainous areasresource and environmental impact effects"Driving force-State-Response"modelsupport vector regression modelsensitivity analysis
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