地铁盾构施工工法专业技术（Professional technology of metro shield construction method）.doc

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地铁盾构施工工法专业技术（Professional technology of metro shield construction method）.doc

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地铁盾构施工工法专业技术（Professional technology of metro shield construction method）

地铁盾构施工工法专业技术（Professional technology of metro shield construction method） Metro shield construction method of professional technology 2009-10-22 12:58:06 reading 126 review 2: big and small Construction method of EPB shield tunneling method 1, characteristics 1.1 shield construction is a multi procedure procedure, with high automation, fast construction, good quality and high safety. 1.2 shield tunneling without precipitation auxiliary construction, and segments are factory prefabricated, conducive to environmental protection and reduce construction interference to the normal order of urban life. 1.3, by establishing and maintaining the dynamic balance between the earth pressure and the water pressure of the excavation surface in the sealed storehouse, the disturbance of the construction to the soil layer is reduced, the working surface is stable, and the surface depression can be effectively controlled. 1.4 compared with the slurry shield method, the required site area is small and the construction cost is low. 2, process principle The working principle of earth pressure balance shield machine is with the advance of shield, soil cutter cutting down into the sealing chamber, the parts of the soil to maintain appropriate pressure inside the warehouse, balancing and water pressure of excavation face. At the same time, through the control of the screw conveyor and the soil dumping valve, the matching of the amount of discharge and the amount of thrust of the shield will be realized, and the dynamic balance of the shield while maintaining the stability of the excavation face will be formed. 3, application examples Beijing metro line four North Station to Beijing South Railway Station interval project, as part of the Beijing Metro Line four. The entire project from the southern city of Victoria Majialou, along the north end Longbei to the village, the line length of 28.14km, a total of 24 stations. The north station to Beijing South Railway Station interval shield tunnel