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Durability span highway tunnel technology research

Author: LiuHeng
Tutor: WangXiuYing；TanZhongSheng
School: Beijing Jiaotong University
Course: Bridge and Tunnel Engineering
Keywords: Durability Factors Lining Mix Optimization Durability Test Shotcrete Life Prediction Large-span tunnel
CLC: U459.2
Type: Master's thesis
Year: 2007
Downloads: 275
Quote: 6
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Abstract


In this paper, Guangzhou Grand Cross tunnel leading engineering background, summed up the tunnel durability analysis methods, through field and laboratory experiments, proposes to optimize mixing ratio predicted durability life of the tunnel, the tunnel structure system to improve the durability of the method discussed. In order to analyze the Grand Cross of the tunnel structure leading durability, this made a lot of structural durability of the research work, to understand the general structure of the durability of the current research and research progress, summarizes the main factors affecting structural durability and its mechanism, and The general structure of the leading durability analysis method and combining the actual situation of mountain tunnels, mountain tunnel on the durability of the leading research. Geological environment in which the tunnel analyze and judge; durability of concrete structures under the current general approach, a lot of concrete mix experiments leading mountain tunnel lining propose suitable concrete mix optimization, theoretically predicted longevity and durability of the tunnel for reliability comparison; proposed technical measures to improve the durability of the tunnel. Leading Mountain Tunnel is the largest two-way split single-hole four-lane highway tunnel, the tunnel cross-section large, so the durability of this tunnel is very necessary, in the Project, based on the main contents of this paper are: (1) Introduction Longtoushan tunnel project overview, through extensive research at home and abroad a large span tunnel engineering example, elaborated on the durability of the current structure of research and major research findings presented durability tunnel architecture research ideas; (2 ) discusses in detail affect the durability of the tunnel structure main factors, the role of theory, while briefly affect the durability of shotcrete main factors; (3) use of the environment of the tunnel were graded according to the durability of concrete structures general method done a lot of concrete mix optimization experiments proposed for optimizing Longtoushan mix concrete tunnel; (4) Life on the tunnel lining durability theoretical analysis, and according to different theories, analyze the structure of the tunnel lining Longtoushan DURABILTY, Theoretical analysis and description; (5) In the above study, based on the theoretical study based on reliability theory lining structure durability, and is quite similar to four-lane tunnel and two-lane tunnel reliability, its long-term durability were analyzed and compared; (6) tunnel waterproofing and drainage system is also an important part of the tunnel durability, impermeability based on the durability test has been carried out their durability analysis, this part of the main research remain unobstructed drainage system construction technology and methods, research timely cleaning and maintenance of drainage systems. Based on the above findings, the consolidated proposed to increase the durability of the tunnel integrated technology countermeasures.

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CLC: > Transportation > Road transport > Tunnel project > A variety of tunnel > Highway tunnel
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