JPH01178614A - Slope stabilizing construction - Google Patents

Abstract

PURPOSE:To stabilize a slope, by a method wherein coupled arms project, and wherein frame plates are coupled with connectors provided with penetrating slots on the centers, to compose slope frames, and wherein anchor bolts are driven into the slope through the penetrating slots. CONSTITUTION:On the periphery, coupled arms 16 with frame plates 2 project, and on the coupled arms 16 of connectors A provided with penetrating slots 15 on the centers, the banded frame plates 2, 2... are fitted, and slope frames are constructed on a slope. Through the penetrating slots 15 of the connectors A, anchor bolts 4 are driven into the slope 3, and spaces on the peripheries of the bolts 4 are filled up with mortar 5. Besides,d keep plates 41 are inserted into the heads of the anchor bolts 4 and are fastened with nuts 42 from the upper sections, and the connectors A and the frame plates 2 are checked with the keep plates 41. As a result, a material cost is economically reduced, and the execution of work is simplified, and the slope can be stabilized.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a slope stabilization method using anchor bolts such as earth anchors.

[Conventional technology]

Recently, construction methods such as the earth nailing method, which strengthen slopes by driving multiple 7-anchor bolts into them, have become popular. In this case, conventionally, after driving the anchor bolt, a restraining plate was bolted to the head of the anchor bolt, and then mortar was sprayed over the plate to stabilize the slope.

[Problem that the invention sought to solve]

However, in addition to reinforcing the slope with anchor bolts, there has been a desire to connect the anchor bolts to each other to further increase the reinforcing effect and to suppress the slope between the anchor bolts.

This invention aims to meet such demands.

[Means to solve problems]

In order to solve this problem, in this invention, a belt-shaped frame plate and connecting arms with the frame plate protrude around the periphery, and a 50 to 150
Construct the legal frame using a connector with a through hole of ψ.

The method involves attaching band-shaped frame plates one after another to the connecting arms of the connector and creating a lattice or truss shape.

Through the through holes of the joints at the intersections of the assembled legal frames,
Drive the anchor bolt into the head of the anchor bolt,
Insert the holding plate and tighten the bolts; -7. Hold down the joint.

If the through holes are filled with mortar or a reinforcing pipe before being held down with the holding play 1-, the connection will be made more securely.

[Effect]

With this structure, the legal frame can be constructed with the same ease as the lightweight legal frame that has been widely used in the past. Anchor bolts are driven into the through holes of the joints, and the joints are held down by the restraining plates, so The anchor bolts are connected by a frame plate.

Since the frame plate is connected to the joint, if a force is applied to the frame plate, it is transmitted to the anchor bolt through the joint, and the slope is suppressed by the tensile force of the anchor bolt.

Since the through hole is large, it is also convenient for drilling into rock prior to driving an anchor bolt.

[Example 1] Hereinafter, embodiments of the present invention will be described in detail based on the drawings.

A galvanized steel plate 10 having a thickness of 2.3 mm is punched out into a substantially rectangular shape as shown in FIG. 1 using a press. Two parallel cuts 11 are provided that reach the center from the same side of the long side, and a refraction line 12 that is parallel to the cuts is provided just outside of the cuts 11. Outside the bending line is a connecting arm forming part 13 formed thinner than the main body, and a connecting hole 14 is provided in the center of the connecting arm forming part.

As shown in FIG. 2, such a punched flat plate was bent at about 45 degrees to the same side at the bend line 12 to form a set plate 1.
.

Next, as shown in FIG.
are assembled three-dimensionally so as to mesh with each other to form the joint tool A.

A through hole 15 is formed in the center of the connector, and the connecting arm forming portion is formed in two pieces around the periphery, and connecting arms 1 protrude radially.
6 is composed.

An anchor bolt with a diameter of 25 to 50 ψ is driven into the through hole, but if the slope is hard, it is necessary to use a drill to drill the hole, and the angle of the anchor bolt to the slope is selected, so a certain amount of allowance is required. It is. From this point of view, the diameter or side size of the through hole should be 50 to 1
50mm is desirable.

Piece I A strip-shaped galvanized steel plate with a thickness of 1.6 mII is pre-notched roll forming to form a strip-shaped frame plate 2 made of a shaped steel as shown in FIG. 4 and straight in the longitudinal direction.

The section of the steel section is a deformed L-shape, and the upper and lower flanges 21 are connected by a bent web 22. The width of the tube is lQcm. In the central straight portion of the web, horizontally elongated holes 23 are provided at regular intervals over the entire length.

As shown in Fig. 5, the ends of the frame plates 2 are successively connected to the connecting arms 16 to the connectors using bolts and nuts, and a lattice-shaped legal frame is assembled on the slope.

As shown in FIG. 6, through the through hole 15 of the connector A,
and drive an anchor bolt 4 several meters long and 3 cm in diameter into the slope 3.

A gap around the anchor bolt 4 in the through hole is filled with mortar 5.

Holding plate 4 with a round hole in the center of a 5mm thick steel plate]
into the head of the anchor bolt, and then tighten nut 4 from above.
2, and use a restraining plate to suppress the joint odor and frame board 2.

Note that the shape of the legal frame is not limited to the embodiment, and may be other shapes such as a diagonal lattice shape or a truss shape. Further, the shape of the connector is not limited to any shape as long as it has a through hole into which an anchor bolt is driven.

〔effect〕

Since the present invention is configured as described above, it has the following features.

■ The legal frame may be similar to the lightweight legal frame commonly used in the past, as long as a special joint with through holes is used, and the material is inexpensive and construction is easy.

■ Since the anchor bolts and the slope are connected by the joints and restraining plates, the anchor bolts are tied to each other, and the force that would try to push up the slope is suppressed by the anchor bolts, making the slope stable. .

■ First of all, in the legal framework that the frame board consists of, whether you install planting sandbags, etc. for greening, or spray mortar, it is possible to prevent them from falling off using the frame board. It's convenient.

[Brief explanation of the drawing]

Fig. 1 is a front view showing an example of a flat plate forming a joint, Fig. 2 is a plan view of a set of boards, Fig. 3 is a plan view of a joint, and Fig. 4 is an example of a frame plate. FIG. 5 is a front view of the assembled legal frame, and FIG. 6 is a side sectional view showing the state in which anchor bolts are driven.

Claims (2)

[Claims] (1) Connecting arms to the frame plate protrude around the periphery of the joint and have a through hole in the center, and the belt-shaped frame plates are attached one after another to the connecting arms to form a lattice-like or truss-like legal frame on the slope. An anchor bolt is driven into the slope through the through-hole, a restraining plate is inserted into the head of the anchor bolt, and the bolt is tightened to restrain the joining tool. Construction method. (2) The slope stabilization method described in item (1) of the scope of the patent structure, which is characterized by loading a filler or reinforcing material into the through hole before inserting the restraining plate and tightening the bolts. .