Experimental study on working parameters of earth pressure balance shield machine tunneling in soft ground |
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| Authors: | Hehua ZHU Shaoming LIAO Qianwei XU Qizhen ZHENG |
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| Affiliation: | (1) Key Laboratory of Geotechnical and Underground Engineering of Ministry of Education, Tongji University, Shanghai, 200092, China;(2) School of Naval Architecture and Civil Engineering, Shanghai Jiaotong University, Shanghai, 200030, China;(3) Department of Civil Engineering, University of Shanghai for Science and Technology, Shanghai, 200093, China |
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| Abstract: | Deep sedimentary deposits of soft clays are widely distributed in coastal areas as well as many interior major cities in China.
In order to study the stratum adaptability of earth pressure balance (EPB) shield machine tunneling in such types of soft
ground, model tests of tunneling excavation, using the running tunnel of the Shanghai Metro Line M8 as a background, are carried
out with different over burden ratios, opening rates of cutter head, driving speeds and rotation speeds of screw conveyor.
Based on the test results, the interrelationships between chamber pressure and mucking efficiency, mucking rate and driving
speed, thrust force and torque are obtained. The influences of tunnel depth, opening rate of cutter head and driving speed
on thrust force and torque are revealed. Such findings can not only facilitate establishing relationships between shield working
parameters and soil properties, but also serve as a guide for the design and construction of shield tunnel in soft ground.
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Translated from China Civil Engineering Journal, 2007, 40(9): 87–94 译自: 岩土工程学报] |
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| Keywords: | soft ground model test earth pressure balance (EPB) shield machine soil body-shield machine system adaptability to stratum property |
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