Static structures (e.g. – buildings) – Processes – Requiring soil work
Reexamination Certificate
2000-04-06
2001-12-25
Friedman, Carl D. (Department: 3635)
Static structures (e.g., buildings)
Processes
Requiring soil work
C052S742140, C052S169600, C052S296000, C052S745100, C405S229000, C405S231000, C405S232000
Reexamination Certificate
active
06332303
ABSTRACT:
BACKGROUND OF THE INVENTION
1. Field of the Invention
This invention relates to a method of building an underground structure, and more particularly to a method of building an underground structure composed of vertical corner columns and vertical concrete columns provided between the corner columns, and concrete panels fitted between adjacent columns. The concrete panels are moved downward while digging the ground under them.
2. Description of the Related Art
In the related art, an underground structure is usually built in the following manner. Concrete columns are vertically installed in a dug area of a ground at positions corresponding to corners and intermediate portions of the underground structure to be built. Concrete panels are fitted between the columns while digging the ground under them to a predetermined depth. The side edges of the concrete panels are joined to the columns using bolts or the like. The bottom of the underground structure is made by applying concrete to a space defined by the concrete panels. (Refer to Japanese Patent No. 282954.)
SUMMARY OF THE INVENTION
According to the invention, there is provided a method of building an underground structure constructed with concrete columns vertically installed at corners and at positions the corners and concrete panels fitted between adjacent concrete columns. The method comprises the steps of: determining positions for installing the concrete columns, and digging a trench for burying a guide used for the concrete columns; drilling holes for burying the concrete columns in the trench, the holes being deeper than a level where the concrete panels are placed; assembling the guide, the guide being composed of outer and inner frames, and guide members for burying the concrete columns; installing the columns in the trenches along the guide, and filling concrete in the holes to fix the concrete columns in the holes; removing the outer frame of the guide; deepening the trench, digging an area for the underground structure, and moving the concrete panels down; installing a reinforcing beam on the concrete columns and the concrete panels to prevent the concrete panels from projecting inward due to soil pressure; and removing the inner frame of the guide after the reinforcing beam is hardened.
This method may further include the steps of providing a bottom of the underground structure by applying concrete on the area defined by the concrete panels, and filling a water sealant in spaces between the concrete panels and the columns, installing frames in spaces between ends of adjacent concrete panels, and filling mortar in the spaces between the concrete panels.
The method is applicable to providing an underground parking lot with a mechanical two-story lift.
The reinforcing beam extending atop the columns and panels are effective in joining them without using bolts or the like, and in preventing the panels from projecting inward due to ground pressure.
REFERENCES:
patent: 5944453 (1999-08-01), Gryba
patent: H10-8476 (1998-01-01), None
patent: 282954 (1998-09-01), None
patent: 2828954 (1998-09-01), None
Friedman Carl D.
NIC Engineering Co., Ltd.
Oblon & Spivak, McClelland, Maier & Neustadt P.C.
Slack U.
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