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    • 10. 发明专利
    • CORE ERECTING DEVICE FOR EARTH RETAINING WALL AND ERECTING METHOD THEREOF
    • JPH05187183A
    • 1993-07-27
    • JP248392
    • 1992-01-09
    • SHIMIZU CONSTRUCTION CO LTD
    • ABE MASAAKI
    • E02D5/18E02D13/00E21D5/01
    • PURPOSE:To facilitate the connecting work of a vertical shaft and a tunnel and shorten the construction period by providing an earth retaining wall around the vertical shaft constructed in the ground, supporting a core with a support section, and erecting it to the preset depth of the earth retaining wall. CONSTITUTION:Every other excavation holes 14 of multiple excavation holes 14 are excavated in the ground with an excavator, and a core 2 placed with a lining material 12 such as concrete is inserted into the preceding and succeeding excavation holes 14. The sediment in an earth retaining wall connected and integrally constructed with the lining materials 12 of the excavation holes 14 is carried out to construct a vertical shaft. The core 2 is supported by a support section 3 capable of opening or closing a core erecting device 1, a moving system 4 is operated by a controller, and the core 2 is moved to the preset depth of the excavation hole 14 of the earth retaining wall. The support section 3 is opened to release the core 2, and the core 2 is erected in the earth retaining wall in the connection area of a tunnel. The excavator excavates only the lining material 12, no face-cutting is required for connecting the vertical shaft and the tunnel, and the load required for excavating the earth retaining wall can be reduced.