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    • 3. 发明专利
    • CONSTRUCTION METHOD FOR UNDERGROUND SKELETON
    • JP2003138584A
    • 2003-05-14
    • JP2001341214
    • 2001-11-06
    • SHIMIZU CONSTRUCTION CO LTD
    • TAMAOKI KATSUYUKIKATSURA YUTAKAKUNUGI TAKASHITAKI SATOSHIKUMADA AKIHIKO
    • E02D23/08E02D29/045E21D13/00
    • PROBLEM TO BE SOLVED: To provide a rational underground construction method by improving a conventional caisson construction method. SOLUTION: A water stop wall 4 reaching a non-water permeation layer 3 and serving also as earth retaining is installed by surrounding a position where an underground skeleton 1 is sunk and provided. The underground skeleton is first constructed in a ground surface part on an inner side of the water stop wall. Pumping of underground water is performed from inner side ground 2 of the water stop wall to dig the inner side ground of the water stop wall while reducing a level of underground water down to below a digged bottom face so that the underground skeleton is sunk and installed by guiding it by the water stop wall and reaches a desired depth. When sinking and installing the underground skeleton, a waterproof layer is formed on its outer face. A weight of the skeleton is supported by the required number of temporarily provided real columns, a blade tip ground reaction force, and a friction force of a peripheral face to prevent unexpected sinking of the skeleton. A jack is installed in a skeleton connection part of the temporarily provided real columns to perform expansion and shrinkage control in accordance with inclination of the skeleton and a situation of stress by interlocking relationship. Mud earth or mud water is poured into a cavity part between the skeleton and the water stop wall or the ground to reduce friction resistance, and mud water is solidified after the sinking and installation of the underground skeleton are completed.