KR20010086663A - A method and apparatus for reinforcing slope stability using connecting wire - Google Patents

Abstract

PURPOSE: A device and method for reinforcing a slope with connecting wires are provided to prevent the local collapse of a slope or a roof fall. CONSTITUTION: A slope reinforcing device comprises: a reinforcing material; an installing member(1); a pressing plate(3); a liner screw(4); a nut(5); a connecting wire(6); and a geogrid(7). The reinforcing material is used as a rock bolt, a soil nail, an earth anchor or an FRP(Fiberglass Reinforced Plastic) grouting. The pressing plate has a hole to be inserted a core(9) of the reinforcing material. The installing member comprises a small flat plate and a protruded wall around the flat plate. A hole is formed at the center of the flat plate to insert the core. A guide hole is formed in the wall. A grouting is cured after constructing the reinforcing materials. The pressing plate and the installing member are inserted in the core. The core is installed with the liner screw and the nut by stressing. Connecting wires are penetrated between the installing members through the guide holes to integrate the reinforcing materials. The geogrid is paved to prevent a roof fall.

Description

Slope reinforcement apparatus and method using a connecting wire {A method and apparatus for reinforcing slope stability using connecting wire}

The present invention prevents local slope collapse or falling rocks that may occur due to the decrease of the strength of the ground and the progress of weathering due to the penetration of rainwater or snow melt into the cut slope reinforced with structural materials such as rock bolts, small nails, FRP, etc. It relates to a slope reinforcement device and method using a connection wire that can be.

Recently, due to large and small slope collapse, application of slope reinforcement method is actively progressed to secure slope stability at each construction site. Structural reinforcement methods such as rock bolts, small nails, earth anchors, and FRP grouting methods are typical slope reinforcement methods, due to the difficulty of cutting and crushing bedrock or securing paper.

Conventionally, rock bolts, small nails, earth anchors, FRP grouting, etc. have been applied to slopes at regular intervals, and then the surface concretes are protected by shotcrete or rust soil. Nocturne soil is not integrated with structural reinforcement materials such as rock bolts or small nails, and the freezing and thawing action of water penetrating into the lower part of shotcrete or rust soil is causing a lift between slope protection and slopes such as shotcrete or rust soil. Since reinforcements such as rock bolts, small nails or earth anchors are not connected to each other and are installed independently of each other, local slope collapse may occur when the slope is weathered separately.

An object of the present invention is to reinforce the cut slope by the slope reinforcement method such as rock bolts, small nails, earth anchors, FRP grouting method, etc., the reinforcement and the reinforcement are bound to each other in a lattice form, and each reinforcement is wrapped by geogrid It is to provide a slope reinforcement device and method using a connecting wire that can prevent local slope collapse or falling rocks by allowing them to behave integrally.

1 is a side view of a slope reinforcement device using a connection wire of the present invention on a slope.

2 is a front view and a plan view of the anchorage.

Figure 3 is a side detail and a plan view showing a binding state of the slope reinforcing device of the present invention.

4 is a front view and a plan view of the pressure plate.

5 is a plan view and side view of the liner screw.

6 is a front view and a side view of the nut.

7 is a plan view and a perspective view of the connecting wire.

<Short description of the symbols in the drawings>

1: anchorage 2: guide hole

3: pressure plate 4: liner screw

5: nut 6: connecting wire

7: Geogrid 8: Reinforcement

9: heartwood

The present invention will be described with reference to the drawings.

1 is a cross-sectional view of a slope reinforcement device using the connection wire of the present invention, a reinforcing material such as rock bolt, soil nail, earth anchor or FRP grouting, It consists of an anchorage 1, a pressure plate 3, a liner screw 4 and a nut 5, a connecting wire 6 and a geogrid 7.

The reinforcing material 8 is to drill the hole 10 into the ground of the cut slope, insert the core 9 into the hole 10 and grout the tip of the hole to fix the core 9 in the ground. As the reinforcing material 8 may be used, such as rock bolt, small nail, earth anchor or FRP grouting, which is commonly used in the art.

Fixture 1 and the pressure plate 3 is for fixing the reinforcing material (8) to the cut-off surface, the pressure plate (3) has a hole formed in the center of the plate material is inserted into the core material (9) of the reinforcing material in the hole The anchorage 1 is composed of a plate having a diameter smaller than that of the pressure plate 3 and a wall protruding along the circumference of the lower surface of the plate, and a hole is provided at the center of the plate to fit the core 9 of the reinforcement material. A total of eight guide holes (2) are formed on the wall and two on each side at 90 ° intervals.

After the reinforcement (8) is constructed in a grid at a predetermined interval in the ground and grouting is sufficiently cured, the pressure plate (3) and the anchorage (1) are inserted into the core (9) of the reinforcement and then the core (9) is tensioned. Fixing is performed using the liner screw 4 and the nut 5. After tensioning the core member 9 of the reinforcement member extending through the central hole of the pressure plate 3 and the fixing unit 1 with the hydraulic jack, the semi-cylindrical liner screw 4 is covered from the top and bottom of the core member 9 and the liner screw ( When the nut 5 is fastened to 4), the core 9 of the reinforcement is fixed on the fixing unit 1. Since the core 9 of the reinforcing material is tensioned, the cut slope is subjected to pressure toward the ground by the pressure plate 3 by elasticity, thereby preventing the collapse of the cut slope.

However, since the stiffeners 8 act independently of each other, a connecting wire 6 or a geogrid 7 is provided to bind the stiffeners 8 constructed in a lattice shape to each other.

A total of eight guide holes (2) are formed on the wall of the fixing unit (1), each of two in up, down, left, and right, and a connecting wire (6) is provided between a plurality of fixing units (1) installed in a grid through the guide hole (2). ) Is installed through two rows. The connecting wire 6 penetrates the guide hole 2 of the fixing unit 1 and is installed in the form of a checkerboard between the adjacent fixing unit 1 and the fixing unit 1 to bind the fixing unit 1 and the fixing unit 1 to each other and to form a grid. Of the anchorages arranged in the form, the outermost anchorage is fixed and fixed. Thus, the respective reinforcements 8 are bound to each other in a lattice form by the connection wires 6, so that even if any one of the reinforcements 8 is broken, it is bound by the connection wires 6 to prevent local collapse. have.

In addition, when weathering proceeds due to rainwater or snow melt that has penetrated the cut surface, there is a risk of falling rocks. Therefore, the geogrid 7 is laid on the cut surface before the connecting wire 6 is installed. Install it to prevent rockfall. The geogrid 7 is fixed to the inclined surface by a pressure plate and a connecting wire in a net-like shape, and prevents rockfall on the inclined surface.

The slope reinforcement device of the present invention is a rock bolt or soil nailing, earth anchor or FRP grouting material of the slope reinforcement by binding the wire and geogrid to form a grid on the slope to integrate the local progressive slope activity failure or rockfall Etc. can be prevented.

Claims (4)

A plurality of reinforcements (8) consisting of a core material (9) inserted into each of the plurality of holes (10) perforated in a truncated slope and grouting injected into the tip of the hole to fix the core material (9) in the ground. ); Plate-shaped acupressure plate (3) having a hole in the center is inserted into the core material (9); It is installed on the pressure plate 3, and consists of a plate smaller than the pressure plate 3 and a wall protruding along the periphery of the lower surface of the plate, the core 9 of the reinforcement is inserted in the center of the plate A fixing hole (1) formed with a plurality of guide holes at 90 ° intervals in the wall; A liner screw 4 and a nut 5 fixing and fixing the core 9 of the reinforcing material on the fixing unit 1; And, A connection wire 6 which is inserted through the guide hole 2 of the fixing unit and binds a plurality of fixing units 1 installed in a lattice shape to each other; Slope reinforcement using a connection wire, characterized in that consisting of. The slope reinforcing device using a connecting wire according to claim 1, further comprising a geogrid (7) which is installed on the cutting slope below the connecting wire (6). Constructing the reinforcement material (8) by drilling a plurality of holes (10) in a lattice shape on the cutout surface and inserting the core material (9) into the plurality of holes (10), and then grouting; Inserting the pressure plate (3) and the fixing unit (1) to the core material (9) of the reinforcing material; Tensioning the core material (9) of the reinforcing material and fastening the liner screw (4) and the nut (5) to the core material (9) to fix it on the fixing device (1); And, Inserting and fixing a connecting wire (6) into the guide hole (2) formed in the wall of the fixing unit (1) to bind the plurality of fixing units (1) arranged in a lattice shape with each other; Slope reinforcement method using a connection wire, characterized in that consisting of. 4. The method of claim 3, further comprising the step of laying a geogrid (7) on the cut-out surface before installing the connection wire (6).