JP3245753B2 - Slope stabilization method - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for stabilizing a slope by installing a reinforced concrete beam on the slope.

[0002]

2. Description of the Related Art A conventional slope stabilization method is performed by the following various methods. <A> A method of assembling a reinforcing bar and a formwork on a slope by manpower, then pouring concrete and fixing with an anchor.

<B> A method of assembling a reinforcing bar and a wire mesh form on a slope, and then spraying concrete to perform the construction.

<C> A method of setting a concrete block body manufactured on a slope on a slope and fixing the concrete block with an anchor.

[0005]

SUMMARY OF THE INVENTION The above prior arts include:
The following problems exist. (1) In the method <A>, since the reinforcing bar and the formwork are assembled manually on a slope, the work is complicated and a large cost is required. Especially, in the cut slope of the bedrock, the unevenness of the ground is remarkable, and it is necessary to manufacture the formwork according to the unevenness, so that the formwork processing is complicated and the formwork is diverted to another construction site. This is a problem from the viewpoint of resource saving.

(2) The concrete spraying method described in <b> is expensive and requires a long time for the casting operation.

(3) In the case of the method using the concrete block of <c>, since it is practically difficult to completely eliminate the gap between the bottom of the block and the slope, rainwater flows from the gap. Etc. may enter and cause corrosion of the anchor. Further, since the block body has low adhesion to the ground, if the anchor is cut, there is a risk that the block body will slide down from the slope. Further, in the case of an uneven ground, the bearing force due to the tension of the anchor works as a concentrated load on the convex portion of the ground, and there is a risk that the block body is broken.

[0008]

SUMMARY OF THE INVENTION The object of the present invention is to solve the above-mentioned problems and to save labor for construction, prevent corrosion of anchors, ensure integrity with the ground, and secure construction. It is an object of the present invention to provide a slope stabilization method capable of achieving the following.

[0009]

According to the present invention, a space for placing concrete is formed by a top plate, a side plate and a bottom sheet, a reinforcing bar is incorporated in the space for placing concrete, and a through hole for an anchor is provided. The formwork provided with the anchor is fixed to the ground, the head of the anchor is penetrated through the through-hole, and placed on the slope, and a concrete is poured into the formwork, and after hardening, it is released from the mold to reinforce the concrete. This is a slope stabilization method in which, after the beam is made, the anchor is tensioned to transmit the tension to the ground through the reinforced concrete beam.

[0010]

An embodiment of the present invention will be described below with reference to the drawings. <A> Structure of Formwork (FIG. 1) The formwork 1 forms a concrete casting space by the top plate 11, the side plate 12, and the bottom sheet 13, and the reinforcing bar 17 is incorporated inside the casting space. And a structure in which anchor through-holes 13 are provided, and these are integrally formed in a factory.

(1) Top plate, side plate A top plate 11 and two side plates 12 facing each other form an upper U-shaped upper frame. The top plate 11 and the side plate 12 are iron plates,
Use a rigid plate material such as plywood or plastic plate. FIG. 1 shows a case in which the upper mold frame is formed in an inverted U-shape, but the upper mold is not only formed in an inverted U-shape but is appropriately formed in a shape corresponding to the cross-sectional shape of the concrete beam. Although FIG. 1 shows a case of a linear mold, a cross or a multidirectional mold may be produced.

(2) Through-hole The through-hole 13 is an insertion hole for an anchor penetrating vertically through the center of the top plate 11. For example, a structure is conceivable in which a tubular body is mounted in the mold 1 and an end of the tubular body is opened in the center of the top plate 11. The diameter of the through hole 13 is at least larger than the diameter of the anchor.

(3) Bottom Sheet The bottom sheet 14 is a flexible sheet attached with a space between the lower end portions of both side plates 12. This bottom sheet
In the case 14, both sides 15 are formed of a material which does not transmit concrete, and a central portion 16 is formed of a material which transmits concrete. For example, a woven or non-woven fabric is used for the material of the side portion 15, and a net or the like is used for the material of the central portion 16. In addition, the central portion 16 may have a structure in which the cord body is crossed between the side portions 15 or a structure in which an opening is provided in the same material as the side portion 15.

(4) Reinforcing bar The reinforcing bar 17 is provided in the top plate 1 in an amount necessary for a reinforcing bar concrete beam.
The concrete is installed in a factory in advance in a concrete casting space formed by the side plate 1, the side plate 12 and the bottom sheet 13. As a method of assembling the reinforcing bar 17, for example, a method in which a rod is provided between the side plates 12 and joined to the rod may be considered.

<B> Fixing of anchor and arrangement of formwork (FIG. 2) As shown in FIG. 2, anchor 2 is fixed to the ground to be constructed. Next, the head of the anchor-2 exposed from the slope is penetrated into the through hole 13, and the mold 1 configured as described above is arranged on the slope. The arrangement of the mold 1 is completed simply by placing it on the slope in this way.

<C> Casting concrete (FIG. 3) Concrete 3 is cast in the formwork 1 arranged on the slope. As a result, the flexibility of the bottom sheet 14 allows the concrete 3 to be filled with the unevenness of the ground and filled.
The adhesion between the beam and the ground can be improved. Also, since the concrete 3 does not pass through the both sides 15 of the bottom sheet 14, the concrete 3 can be prevented from flowing out to the outside. Due to the contact, the adhesion is enhanced. At this time, since the mold 1 is locked by the anchor 2, there is no possibility of slipping. Then, after curing and hardening of the concrete 3, only the top plate 11 and the side plate 12 are removed from the mold to construct a reinforced concrete beam.

<D> Tension of the anchor The head of the anchor-2 exposed from the through hole 13 of the mold frame 1 is gripped by a jack or the like, and pulled to tension the anchor-2. Then, the head of the anchor-2 is fixed to the upper surface of the reinforced concrete beam by a fixing tool. Thus, the tension can be transmitted to the reinforced concrete beam, and the slope can be stabilized.

[0018]

Since the present invention has been described above, the following effects can be obtained. <B> Reinforcing bars are also incorporated in the formwork, and the placement can be completed simply by placing them on the slope. Therefore, the work of assembling the reinforcing bar and the formwork on the slope can be omitted, and remarkable labor saving in construction can be achieved. In addition, since there is no complicated work, a skilled worker is not required, and mechanized construction can be performed.

<B> Since a sheet is used at the bottom of the formwork, the concrete is cast in conformity with the unevenness of the ground. Therefore, the adhesion between the concrete beam and the ground can be enhanced, and safe construction without slipping or breakage can be achieved.

<C> Since the adhesion between the concrete beam and the ground is high, it is possible to block the intrusion of rainwater or the like and to prevent corrosion of the anchor.

<D> Since the bottom of the formwork is formed by a sheet,
Lower costs. In addition, the top plate and side plate on the upper part of the formwork can be diverted to another construction site, which is effective from the viewpoint of resource saving.

[Brief description of the drawings]

FIG. 1 is an explanatory view of a formwork structure.

FIG. 2 is an explanatory view of a state where a formwork is arranged on a slope.

FIG. 3 is an explanatory view of a state where concrete is cast in a formwork.

──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Shingen Nagaoka 1-6-12 Moto Asakusa, Taito-ku, Tokyo Free Industry Co., Ltd. (72) Inventor Koji Nagata 1-6-12 Moto-Asakusa, Taito-ku, Tokyo -Within Industrial Co., Ltd. (56) References JP-A-61-72124 (JP, A) JP-A-2-8417 (JP, A) JP-A-3-161615 (JP, A) (58) Fields investigated ( Int.Cl. ⁷ , DB name) E02D 17/20 104

Claims (2)

(57) [Claims] (1) Concrete by a top plate, a side plate and a bottom sheet.
Forming a intercluster of hitting設空, embedded rebar therein between the droplet設空and anchor consisting tube - the through-hole of the head - a mold having a through hole, the anchor was fixed on natural ground of The concrete is cast into a formwork, and after hardening, it is released from the mold to produce a reinforced concrete beam, and then the anchor is tensioned to reduce the tension in the reinforced concrete. It is transmitted to the ground via beams,
Slope stabilization method. 2. The slope stabilizing method according to claim 1, wherein both sides of the bottom sheet are formed of a material through which concrete does not penetrate, and a center portion is formed by a mold formed of a material through which concrete passes. Law.