Risk Analysis For Construction Of Highway Tunnel With Gas

This thesis concentrates on the construction of tunnel of Liu Jia Pai which lies on the Loudi-Xinhua highway in Hunan Province of China, makes the related research on risk for construction of highway tunnel with gas. The results are as follows:(1) This article discusses the risk assessment is an important means which can ensure high gas tunnel safety during construction.It is the development of key projects of geotechnical engineering and tunnel engineering.(2) In this paper,Expert Investigation Analysis method has been adopted to recognize the main risk factor during the gas tunnel construction.The risk hierarchical structure for construction of the tunnel of Liu Jiapai was established by using the Analytic Hierarchy Process, and the synthesis weights of each basic risk event was calculated by 1-9 scales method.(3) Considering the risk measuring during the gas tunnel construction based on fuzziness characteristic,the qualitative question of risk estimate of gas tunnel construction was processed quantitatively by using fuzzy theory, the probability and damage expectancy results of risk factors of construction of the tunnel of Liu Jiapai was obtained.(4) A multi-level fuzzy synthetic evaluation mathematical model for risk of construction of Liu Jiapai tunnel was established.The influence of the probability and the loss of risk factor to the risk assessment was overall evaluated based on R=P X C model and fuzzy synthetic evaluation theory.And the rank and risk distribution of various risk factor and the the whole project was obtained.(5) Aimed at the significant risk events which were definited in the risk recognition stage,and combined with a variety of risk countermeasures, the paper proposed various risk factor's regulatory measures to reduce or transfer risk.(6) Proposed risk analysis model during tunnel construction.Make risk analysis and appraisal using textual model, risks will be reduced to a minimum. Ensure safety in production,and play a guiding role to guarante project smooth completion.