The Effect Of The Research On The Cost Control Of Freeway Bridge-to-tunnel Ratio

In recent years,the development process of freeway construction in China has shifted to mountainous areas.Due to the mountain terrain,the inherent characteristics of the terrain and the economic situation,coupled with the cost of bridge&tunnel engineering is much higher than the cost of subgrade engineering construction.The study of the relationship between "bridge-to-tunnel ratio" and "cost control" is one of the major problems in the current urgent need of freeway construction.Therefore,this paper focuses on the bridge-to-tunnel ratio multi angle research of freeway cost control.This paper first studies the cost of highway engineering and highway project cost management,understand the highway cost control management mechanism;And then to bridge&tunnel engineering itself as the core,the use of project construction process in a phased analysis of its relationship with the cost control,and how to stand on the basis of bridge&tunnel engineering cost control;Taking the bridge-to-tunnel ratio as the core,the paper studies the three factors(route selection,land resource and environmental protection)which affect the bridge-to-tunnel ratio,and studies how the cost control of the expressway is combined with the bridge-to-tunnel ratio,and how to consider the bridge-to-tunnel ratio And the relationship between the various factors to strengthen the freeway cost control;And then through the collection of completed freeway data,combined with mathematical thinking and sensitivity analysis method to establish cost control fitting model--Gaussian Fitting Cost Control Model Based on Bridge-to-tunnel Ratio and Bridge-to-tunnel Ratio Series Model.Using the model to analyze the rules of bridge-to-tunnel ratio and Technical and economic index of construction and installation cost and the causes of the law.Summarize the practical significance of bridge-to-tunnel ratio on the cost control of expressway.And the feasibility and validity of the method are verified by three expressways in Yunnan Province.The content of this paper is based on the current situation and actual demand of freeway construction in our country;The construction of the model used in the field of bridge-to-tunnel ratio research is a certain degree of innovation;The research results presented,for our country bridge-to-tunnel ratio and freeway cost control research and development is a certain role in promoting and theoretical reference and practical guidance.