| 摘要 |
<p>PURPOSE:To increase resistance force against the floating of a construction by pressing many bar shaped substances into the ground around an underground construction such as a tunnel to improve the ground. CONSTITUTION:A large number of openings are provided along wall and floor of a tunnel 1, and bar shaped substances 4 are inserted in the horizontal direction, diagonal downward direction and vertical downward direction toward the outside ground from the openings 3. After insertion, the openings 3 are filled with mortar and others. In case of shield driving method, the openings 3 are provided to a segment 2 in advance and are filled with a packing material, and after inserting the bar shaped substances in the packing material, ground water from the outside is stopped by cement milk and others. According to the constitution, the whole construction can be done in the inside of an underground construction, and construction can be done at a low construction cost and with a shorter construction period.</p> |
