Structure for preventing frost heave damage to an underground structure and a method of installing the same
AssigneeKonoike Construction Co., Ltd.
InventorsKazuo Takeda, Akihiko Okamura, Juichi Nakazawa, Akiyoshi Otobe
Life of this patent
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Abstract
A durable frost heave damage preventive structure of underground structures applicable easily and at low cost to many different kinds of underground structures. The frost heave damage preventive structure includes a plate-like reaction member (7) provided at the bottom of an underground structure (1) approximately in parallel to a freezing front in the ground.
Claims9
A method of installing a frost heave damage preventive structure in soil having a seasonal freezing layer and a maximum freezing depth, the method comprising:
- excavating a pile hole in the soil to a depth below the maximum freezing depth, wherein the excavated pile hole has a predetermined diameter and depth;
- inserting a pile into the pile hole, said pile having a plate-like reaction member which projects from an outer circumferential surface of the pile, wherein said reaction member is spaced from a bottom end of the pile and the predetermined diameter of the pile hole is greater than the diameter of the reaction member;
- driving the pile into the pile hole so that said reaction member is positioned at the bottom of said excavated pile hole below the maximum freezing depth;
- and
- back filling a space over the reaction member between said pile hole and said pile outer surface.
A frost heave damage preventive structure for protecting piles supporting a ground structure, located in a cold region, from damage due to frost heave of soil and thaw settlement, said frost heave damage preventive structure comprising:
- a plate-like reaction member provided on a side face of a lower portion of each of the piles, wherein said plate-like reaction member extends approximately in parallel to a freezing front of the ground, and said reaction member is positioned in the ground at a depth which is deeper than a maximum freezing depth of the ground.
Dependencies are inferred from the claim text.