Abstract:
PROBLEM TO BE SOLVED: To provide a drain material installation device configured to prevent deformation, breakage, etc. of an anchor when implanting a casing and make force for retaining it in the ground effectively act on the anchor when pulling out the casing.SOLUTION: The drain material installation device includes a co-rise prevention mechanism 10 which is provided on a lower end part of a casing 4 and prevents the co-rise of a drain material 7. The co-rise prevention mechanism 10 includes a hollow cylindrical inner side member 21, and an outer side member 41 to which the inner side member 21 is fitted and which is slidable to the inner side member 21. When the outer side member 41 is at a first movement limit position with respect to the inner side member 21, a lower end part of the outer side member 41 is abutted to an upper surface of an anchor 11 together with a lower end part of the inner side member 21. When the outer side member 41 reaches a second movement limit position from the first movement limit position by the rise of the inner side member 21 when the casing 4 is pulled out from the ground, the outer side member 41 rises together with the inner side member 21.
Abstract:
PROBLEM TO BE SOLVED: To provide an installation method of horizontal drain material for improving a soft ground capable of reducing works at a construction site and horizontally installing a horizontal drain material economically and effectively. SOLUTION: An installation method of horizontal drain material is that a prescribed quantity of drain materials 10 which is to be installed in a horizontal direction is one unit as a drain material unit A, the drain material unit A which is connected with a prescribed interval length between the drained materials adjacent each other via drain material connectors 11 which correspond to a desired installation interval length is used, the drain material unit A is winded as a roll state that the interval of the connected drain materials 10 is shorter than the installation interval, is carried in the installation site in the rolled state of being winded, and, while the drain material unit which is winded in the rolled state is winded back and the edge of the drain material unit is drawn out, the drain material unit is drawn out to the surface of the soft ground by widening the interval of the drain material to the same length of the drain material connectors. COPYRIGHT: (C)2011,JPO&INPIT
Abstract:
PROBLEM TO BE SOLVED: To prevent the breakage of a board drain and a drop in the water permeability of the same resulting from the consolidation settlement of the board drain. SOLUTION: The board drain 1 includes a belt-like core 2 having a plurality of groove stripes 21 and 21a formed on its surface to extend longitudinally, and a sheet-like filter 3 which is joined to the surface of the core 2 to cover openings of the groove stripes 21 and 21a to form water-permeating channels 4 between the filter 3 and the openings. The core 2 is made of a resin containing a starch-based material and has a hydrophilic group. COPYRIGHT: (C)2010,JPO&INPIT