Construction safety evaluation method of unbiased tunnel based on variable weight fuzzy comprehensive evaluation

Abstract

The present invention relates to a safety evaluation method for bias tunnel construction based on variable weight fuzzy comprehensive evaluation, comprising: step 1, determining the safety evaluation index system of bias tunnel construction, the first layer is the target layer, the second layer is the criterion layer, and the second layer is the target layer. The third layer is the index layer; the criterion layer selects four evaluation indexes of bias degree, surrounding rock characteristics, tunnel characteristics and hydrological characteristics; determine the classification standard of the evaluation indexes; step 2, use the analytic hierarchy process to obtain the initial weight of the index, according to the dynamic index The data is used to adjust the initial weight of the index with variable weight; Step 3, based on the fuzzy comprehensive evaluation, evaluate the safety evaluation index system after the variable weight adjustment; Step 4, comprehensively determine the construction safety level of the biased tunnel according to the evaluation level. This method applies the fuzzy variable weight analytic hierarchy process to the construction safety evaluation of biased tunnels, and conducts safety evaluations of biased tunnel construction in a more objective and effective way, thus obtaining a safer construction method.

Description

technical field [0001] The invention belongs to the field of bias tunnel construction safety evaluation, in particular to a bias tunnel construction safety evaluation method based on variable weight fuzzy comprehensive evaluation. Background technique [0002] my country is a mountainous country with numerous mountains. It is inevitable that roads and railways will need to be built on slopes in hilly areas. With the rapid and large-scale construction of highways in mountainous areas and the development of urban underground space, shallow tunnel engineering has become an important form of traffic structures. In the construction of roads in mountainous areas, whether it is railways or highways, many lines are restricted and affected by the natural geographical environment and other factors, and often need to pass through mountain slopes, and most of the lines pass through the mountain in the form of tunnels, and there are mostly biased conditions at the tunnel entrances. The ...

AI Technical Summary

Problems solved by technology

However, due to the changes in the environment of the unbalanced tunnel, there are many uncertain factors, especially the inherent spatial variability of the rock and soil itself, which makes the uncertain factors that should be considered in the stability analysis of the tunnel engineering more complicated.

Therefore, there will be a high degree of risk in using the AHP to analyze and evaluate the construction stability of unbiased tunnels.

Images