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Large section covering body and method of constructing large section tunnel
Large section covering body and method of constructing large section tunnel
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机译：大断面覆盖体及大断面隧道的施工方法
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摘要
An object of the present invention is to provide a large cross-section lining body and how to build a large cross-section tunnel that is capable of widening the existing tunnel.From A lamp tunnel 1 and step to build a radial space towards a substantially perpendicular direction of the tunnel axis, reaching in the radial direction space from the side wall of the radial space allowed to start the tunnel boring machine in after being boring in an annular drilling and process, and the process to build a cylindrical shell part 3 surrounding the lamp tunnel 1 by making continuous a plurality of annular tunnel 31A-31C, a cylindrical shell portion 3 inside the ground to build a ring-shaped tunnel 31A to and, it opened a process to build a gable wall portion 4 so as to close the both ends of the cylindrical shell section 3, the interval between the preceding tunnel of multiple book toward the outside of the gable wall section 4 from the inside of the gable wall portion 4 preceding tunnel and the construction process, and the line tunnel construction process after building the trailing tunnel during the preceding tunnel adjacent to each other, leading tunnel and drilled a region surrounded by the trailing tunnel form a large cross-section to be juxtaposed And a drilling step of.(FIG.
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