Shallow overbuden tunnel construction method

摘要

the present invention is a road or railway crossing at the bottom of shallow tunnels in the ground settlement that does not allow shallow tunnels It relates to a method, shallow tunnel construction method according to the present invention, the load for measuring the subsidence of the upper part of the construction of a tunnel around the shallow tunnel Extended small meter (Rod Extensometer; 11) and the horizontal deformation of the shallow tunnel excavation of the sink Hinckley furnace meter (Inclinimeter; 12) for measuring a step (S1) to install; No cleaners of the meter 12 and the excavation line of the pilot tunnel excavation 21 in the central position of the Temple added to the bottom of the tunnel, and the center of the left and right pilot tunnel line on both sides of the pilot tunnel (21, 22, a step (S2) to install the pilot tunnel for the pipe roofs 30 in the longitudinal direction of the tunnel in the excavation line 23); Excavating the excavation line of the center and left and right of a pilot tunnel (21, 22, 23) to ringkeot, install the band-shaped drain boards 35 at the bottom of the inside of the pipe loop (30) is already installed in the excavation line, and the strip-like Each of the excavation line of the drain boards in the lower pre-load but jaekking the steel ribs 40 to the inside jack 50 of the unit 35, and the steel ribs 40 are the center, left and right of a pilot tunnel (21, 22, 23) laying the left and right of the steel ribs 41 on both sides on both sides of the step (S3), and is built by connecting the arched steel ribs 42, the preloading jack 50 via the left and right between the steel ribs 41; It constructed a pillar portion (25, 26, 27) of the base and the pole on each of the left and right side wall of the center and left and right pilot tunnel (22, 23) of the pilot tunnel 21 of the central and of the pillar portion 25 and a step (S4) for grouting the upper part of the Temple of Heaven; But form the main tunnel 28 is supported on the two sides of the pillar portion 25 of the left and right pillar portion (26, 27) of the pilot tunnel 21 of the center, along the excavation line of the main tunnel 28 installed to the pipe loop prophet beam 31 for the main tunnel in the longitudinal direction and the pillar portion 25 and the left and right both sides of the pilot tunnel in the middle of the pilot tunnel (21, 22, 23) of the pillar portion (26, 27, steel ribs 40 and the pilot tunnel for the pipe loop (30) in the step (S5) to the inside of the dissolution); The band-shaped installing drain boards 35 at the bottom of the inside of the main pipe loop tunnel 31 along the main tunnel excavation 28 in the ringkeot and pipe loop for the main tunnel 31, the band-shaped drain boards 35 lower preloading the steel ribs 40, characterized in that formed on the inside of the step (S6) of the jack jaekking 50. ; This invention having the above construction is the road, the method mainly used for the tunnel can not be accepted under the conditions of the wonjiban sink tunnel condition such as the upper part of the space is limited and the rail, all but the second soft ground It can be applied to the soil and in particular, curved tunnel construction is also possible, and advantageous in the air with a special method of conventional economics than the tunnel, and the shape of the tunnel arch tunnel, two arches, one-arch, arch tunnel won without a pilot tunnel and the like can be variously constructed to.