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Cross-Harbour Tunnel shield on ground stability and construction process segment mechanical properties

Author: TangYiFeng
Tutor: TanZhongSheng
School: Beijing Jiaotong University
Course: Bridge and Tunnel Engineering
Keywords: Cross-Harbour Tunnel Shield docking Centrifuge test Segment stress
CLC: U455.43
Type: Master's thesis
Year: 2010
Downloads: 136
Quote: 0
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Abstract


Of shield tunnel construction of a one of the main construction method has been widely used in China has , however Shield as a relatively new method , on the design and construction have a lot of problems to be solved . The first problem is that the shield docking of its natural advantages in the long tunnel , but the technical difficulty is relatively large . The Guangzhou Shiziyang submarine shield tunnel shield docking in the country for the first time . Shield docking stability of surrounding rock ? Choose what kind of docking the most scientific method ? To the Guangzhou Shiziyang submarine shield tunnel engineering background , centrifugal experiments as the main means of research , combined with numerical simulation analysis on this issue discussed, and draw some meaningful conclusions . The second question is : Shield project , lining segments and investment usually accounts for 30 to 40% of the project investment is an important factor to affect the construction of economic and structural security . Under the same conditions , however , the shield segment in China than foreign thick , reinforced with much . Of the design of the shield segment is not too conservative ? Whether on the basis of scientific analysis to further reduce the cost ? Through field tests and numerical analysis , seeks to explore the true force of the shield segment shield the design of the tube sheet to provide scientific guidance . The main results are as follows : (1) The theory of the centrifuge test to determine the centrifugal acceleration of the centrifuge test , and completed the surrounding rock similar material , tunnel structure similar material preparation, model making and production of machinery and equipment . ( 2) China Institute of Water Resources and Hydropower centrifuge, shield the docking tunnel face the centrifuge test , focus on the shield docking tunnel face stability and force . Shield docking stability of surrounding rock some meaningful conclusions . (3 ) shield segment to carry out a large number of measured work , get the shield segment , the bolt actual stress . (4 ) combined with the measured data , the use of beam joints are not continuous model , numerical simulation analysis on the the shield segment by force , and compared with the measured values ??, a few meaningful conclusions .

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CLC: > Transportation > Road transport > Tunnel project > Tunnel construction > Construction methods > Shield Law ( full- face excavation )
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