| 摘要 |
PURPOSE:To squeeze out water by injecting a grout evenly into cracks by a method in which sand layer is covered on a base ground, a concrete board with a drain window and a grout injection hole is further covered on the sand layer, and a grout is injected into the ground. CONSTITUTION:A base ground 21 is covered with a sand layer 24 and a concrete board 25, and then a grout 32 is injected through an injection pipe 30 into the base ground 21. In this case, although the grout 32 bleeds out to the surface of the base ground 21 along cracks 33, the leak of the grout 32 itself is avoided by the weights of the sand layer 24 and the concrete board 25, and the grout or cement is accumulated in the cracks 33 and most of water exude out to the surface of the base ground 21. Water coming into the sand layer 24 is taken out from a drain window 28 to the outside. Also, to prevent the run-off of sand, a water-permeable filter 29 is provided to the drain window 28. |
