JPH0396517A - Slope frame spacer and construction method for slope protection structure making use thereof - Google Patents

Abstract

PURPOSE:To form a uniform slope along a side slope by placing slope frame forming main reinforcing bars in all directions along the direction to which each upper end reinforcing bar is extended in an upper frame, and placing reinforcing bars in all directions as well in a lower frame. CONSTITUTION:A slope frame spacer 10 is constituted of an upper frame 15 formed by combining a plurality of reinforcing bars in parallel crosses, a lower frame 16 combined a plurality of reinforcing bars downward thereof in parallel crosses as well and posts 17 capable of controlling the height of four reinforcing bars extending downward by crossing them between intersecting points of the frames 15 and 16. The slope frame spacer 10 having the height controlling posts 17 is transported to a construction site, and it is placed to vertical and horizontal intersections arranging main reinforcement framed bodies on the side slope of a bedrock. In addition, the upper and lower frames 15 and 16 are controlled in a position having a specific height in accordance with the depth of a recess at the position, reinforcing bars are arranged on the frames to maintain a certain height, and a side slope structure having a uniform inclination on a recessed and projecting side slope is constructed.

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention relates to a slope protection structure constructed on a mountain, and particularly when constructing a slope protection structure on an uneven slope. The present invention relates to a spacer for a slope frame for constructing a slope protection structure with a certain slope, and a method for constructing a slope protection structure using this spacer. [Conventional technology] Conventionally, formwork is constructed in a lattice pattern to extend vertically and horizontally along the ground, and after placing reinforcing bars within the formwork, concrete is poured into the formwork to form the slope. Slope protection structures for stabilization are known.

Among these, when the slope of the ground has relatively large undulations and is a randomly uneven surface, the method shown in Figure 4 is adopted when constructing a structure that presents a uniform slope without such unevenness. ．． Figure 4 is a schematic side view showing the conventional method for constructing a slope protection structure. In order to construct a structure on a slope 1, first the depth of each recess on the slope 1 is measured. Then, prepare a spacer 4 to be placed in each recess. As shown in FIG. 5(A), this spacer 4 is made of a concrete block formed to have a predetermined height depending on the depth of the recess in which it is to be placed. A groove 4a is formed in which a reinforcing bar 2 for a certain shape is to be placed. Further, as shown in FIG. 5(B), this spacer can also be formed as a support member 4' made of reinforcing steel and provided with a support part 4a' of a predetermined height by shaping steel wire. On the top surface, there is a groove 4 for placing reinforcing bars 2 for forming a legal frame.
b' is formed.

Next, a spacer 4 formed to have a predetermined height according to the depth of these recesses is placed at a predetermined location on the slope 1 shown in FIG. If the reinforcing bars 2 are placed and fixed, the reinforcing bars 2 will be arranged with a constant linear slope regardless of the unevenness on the slope 1. In this way, a plurality of reinforcing bars 2 are arranged vertically and horizontally on the slope l, and these reinforcing bars are surrounded using hoop reinforcements 3, etc., and the surroundings of the reinforcing bars 2 arranged vertically and horizontally are covered with expanded metal, etc. A formwork is formed by surrounding it with weir boards, and finally, concrete is poured into this formwork (not shown) to construct a slope frame as a concrete structure that covers the slope 1 in a grid pattern. It is something. [Problems to be Solved by the Invention] By the way, when constructing a structure using the spacer 4 as described above, it is necessary to prepare the spacer 4 prior to construction, and furthermore, this spacer 4 is placed on the structure. They must be shaped to have various heights to match the depth of each recess on the slope 1 of the site where the spacer is to be installed, and it takes a great deal of time and money to manufacture each of these spacers 4 one by one. There was a problem that it required In addition, when constructing a slope structure using the method described above,
At the site, prior to placing the reinforcing bars, each spacer 4 must be placed in the exact location where each reinforcing bar should be placed, which has the drawback of requiring a lot of effort and difficult work. ．． The present invention has been devised in view of the above problems, and the first object of the present invention is to eliminate the need for pre-shaping to fit the depth of the concave portion of a random slope. The object of the present invention is to provide a spacer for slope structures that can be adjusted appropriately on site to accommodate the unevenness of the slope and can be used as is for positioning reinforcing bars. The second object of the present invention is to eliminate the need to survey the depth of recesses that will become the vertical and horizontal intersections on the slope before reinforcing reinforcement work at the site. By placing a spacer in the area and adjusting the height using this spacer, the positioning required for reinforcing bars can be completed at the same time, making it possible to easily perform reinforcement work on slope structures. The purpose is to provide a construction method. [Means for Solving the Problems] In order to achieve the above-mentioned first object, in the present invention, the spacer for the legal frame is provided with a first upper end reinforcement made of at least two reinforcing bars arranged in parallel. and a second top reinforcement consisting of at least two reinforcing bars arranged in parallel so as to intersect the first top reinforcement in a lattice pattern, and an upper frame is formed with an appropriate interval from the top frame. A first lower end reinforcement consisting of at least two reinforcing bars arranged below and extending in the same direction as the first upper end reinforcement; A lower frame is formed by a second lower end reinforcement consisting of at least two reinforcing bars arranged in the upper frame, and between the intersection of each reinforcing bar that makes up the upper frame and the intersection of each reinforcing bar that makes up the lower frame. The slope protection formwork was configured to be supported by erecting struts that span the slopes and extend downward in a direction perpendicular to each reinforcing steel, and by making the height of the struts adjustable. In addition, in order to achieve the above second object, the present invention provides a method for constructing a slope protection structure, in which spacers for slope frames having the above configuration are respectively installed at predetermined locations on a slope having unevenness. Place it and find the height of this spacer support! l! The height is maintained at a predetermined height by jointing the spacer, and then the upper main reinforcement consisting of at least two long reinforcing bars is stretched across the upper frame of each adjacent spacer vertically and horizontally, and the lower frame is supported at a predetermined height. The lower main reinforcing bars, which are long length reinforcing bars, are strung across vertically and horizontally for support.
These upper main reinforcements and lower main reinforcements form a main reinforcement assembly, and the main reinforcement assembly that protrudes from each spacer in all directions is surrounded by weir plates from left and right to form a formwork, and concrete and concrete are placed within the formwork. It was constructed by pouring hardened material. [Function] In the spacer for a slope of the present invention, the pillars can be adjusted to various heights depending on the unevenness of the slope. By placing reinforcing bars at each location where they intersect in a lattice pattern vertically and horizontally, and adjusting the height using the pillars of each spacer, the reinforcing bars placed using these spacers can be placed at a predetermined height from the slope. It can be kept in place. Next, the main reinforcements for forming the slope frame are fixed along each of the upper reinforcements on the upper frame, and the reinforcement is arranged vertically and horizontally along the direction in which each of these upper reinforcements extends, and the lower frame of the spacer is In addition, other main reinforcements are supported and fixed along each bottom reinforcement, and the reinforcement is arranged vertically and horizontally along the direction in which these bottom reinforcements extend. This completes the vertical and horizontal positioning of the reinforcing bars so that a uniform slope can be formed along the slope. By surrounding the reinforcing bars with weir plates to form a formwork and pouring concrete into the formwork, the slope can be protected! The structure is perfected.

In this way, there is no need to prepare a pre-shaped spacer before transporting it to the site, and therefore there is no need to measure the depth of the recess on the slope before manufacturing the spacer. [Embodiment] Hereinafter, a preferred embodiment of the present invention will be described in detail based on the accompanying drawings. FIG. 1 shows the entire structure of a spacer 10 for a legal frame according to the present invention. This spacer 10 for the slope includes an upper frame 15 formed by combining a plurality of reinforcing bars in a parallel cross shape as described later, and an upper frame 15 arranged below this upper frame, and formed by combining a plurality of reinforcing bars in a parallel cross shape as well. The lower frame 16 is made of steel, the upper frame 15 is made of four reinforcing bars, and the lower frame 1 is made of four reinforcing bars.
The height-adjustable column 17 extends downward between each intersection with the column 6. The upper frame l5 has a first upper end reinforcement 11 made of two parallel reinforcing bars, and two reinforcing bars that intersect with the first upper end reinforcement 11 in a grid pattern and are arranged parallel to each other. It consists of the second upper end reinforcement 12. This upper frame 1
5, the second top reinforcement 12 is placed on the top of the first top reinforcement 11 so as to be perpendicular thereto, and these are combined in a grid shape, and the intersection parts of each reinforcement are welded or bonded. It is formed by fixing. The lower frame 16 has the same structure as the upper frame 15, and has two reinforcing bars arranged in parallel to form a first lower end reinforcement l4, and a second lower end reinforcement l4 to be orthogonal to the first lower end reinforcement l4. Place the two reinforcing bars that are the bottom reinforcements 13 on the first bottom reinforcement 14 [
These reinforcing bars are combined into a lattice by placing them parallel to each other. Next, the intersections of the reinforcing bars are fixed by welding or the like, and the lower frame 16 is placed below the upper frame 15.

The height adjustment column 17 has four reinforcing bars strung between the four intersections of the reinforcing bars that make up the upper frame 15 and the four intersections of the reinforcing bars that make up the lower frame 16. It extends downward. This height! li! The ff support column 17 is attached to the upper frame 15
Since each intersection of is bridged between each intersection of the lower frame 16 facing each other, the reinforcing bars that make up the upper frame I5 and the lower frame I6 extend perpendicularly to each other. It is fixed with binding wires etc. at each intersection with these reinforcing bars, and the lower part is a second
As shown in the figure, the length can be increased. In FIG. 2(A), the height adjustment struts 17 of the spacer IO for the legal frame are formed in advance so as to extend downward for a relatively long length. Such a height adjustment column 1
7 to the site, place it on the slope of the ground at the vertical and horizontal intersections where the main reinforcement assembly is to be arranged, and cut it to a predetermined length L according to the depth of the recess at that location. Prop at position■
Cut the bottom end of 7. As a result, the upper frame 15
Since the positions of the lower frames 16 and 16 are adjusted to predetermined heights, the heights of these reinforcing bars can be kept constant by arranging reinforcing bars on these frames as described later.

FIG. 2(B) shows an example in which the pillars 17 of the spacer 1o for the legal frame are formed relatively short. Such spacers IO are arranged at the vertical and horizontal intersections of the slope, and an extension reinforcing bar 17a cut to a predetermined length according to the depth L'' of the recess at that point is attached to the height support. Attach it so that it overlaps the lower end of the upper frame l7.
5 and lower frame l6 are adjusted to a predetermined height, the height of the reinforcing bars can be maintained constant by supporting and fixing the reinforcing bars on these frames, as shown in Figure 2 ( This is the same as in case A). The spacer 10 for a slope according to the present invention is configured as described above, and a method for constructing a slope structure having a uniform slope on an uneven slope using this spacer 10 will be described below.

In FIG. 3(A), recesses 21, 22.
23, this slope A has an uneven slope.

First, the spacer 30 for the legal frame, which has been assembled in advance at the factory,
40.50 was carried to the site and recessed areas 21, 22.
Each spacer is placed so that it is lined up in a straight line at the vertical and horizontal intersections including on 23.

In this recess, the height adjustment columns 37, 47 of each spacer.
Cut or splice 57 to the specified length. At this time, determine the length of each spacer's support so that the line connecting the upper surfaces of the upper frames 35, 45.55 of each spacer and the line connecting the upper surfaces of the lower frames 36, 46.56 are straight. Bye.

For example, in the case shown, the depth of the recess 22 is deep compared to the other recesses, so the struts 47 of the spacer 40 placed in this position are relatively long and therefore supplement the extension struts, while Since the recess 23 is shallower than the other recesses, the support 57 of the spacer 5o placed at this position is cut to a certain length. After the height adjustment of each spacer is completed, if necessary, these spacers 30, 40, 50 are fixed on the slope using anchors. Next, a first upper main reinforcement 24.24° consisting of two parallel elongated reinforcing bars is spanned over the upper frames 35, 45.55 of each adjacent spacer 30, 40.50. that time,
The first upper main reinforcements 24, 24° are fixed to the upper end reinforcements of each upper frame of the spacer using binding wires or the like.

Also, in the same way, the first lower main reinforcement 25 is strung across the lower frames 36, 46, and 56, and this is fixed to the lower end reinforcement of each lower frame using binding wires, etc.! Ru. Similarly, elongated second upper main reinforcements 26, 26°, 27, 27'' 2B, 2B are also installed in the direction orthogonal to the inclination direction of the slope A.
' and secure it (see Figure 3 (B)). These second upper main reinforcements are 24 degrees above the first upper main reinforcements! 1, and is fixed to the upper end reinforcement of the upper frame of each spacer using a binding wire or the like. Similarly,
A second lower main reinforcement (not shown) is also placed on the lower frame of each spacer in a direction perpendicular to the inclination direction of the slope A. In this way, a main reinforcement assembly 58 consisting of two upper main reinforcements and two lower main reinforcements is provided extending from each spacer in all directions.

Next, a plurality of hoop muscles 60 prepared in advance are placed around the main reinforcement assembly 58 at predetermined intervals to surround the upper reinforcement assembly, and each hoop reinforcement 60 is fixed with a binding wire. Ru.

With the above steps, the work of arranging reinforcing bars for forming the slope frame in the vertical and horizontal directions of the slope surface A is completed. Therefore, each spacer not only provides height adjustment of the structure to be built;
It plays the role of positioning the reinforcing bars to be placed on the slope, and this positioning is done by adjusting each spacer to a predetermined height, which corresponds to the vertical and horizontal intersections of the structure to be constructed on the slope. It can be completed by simply fixing it in place. It goes without saying that the spacer is not provided only at the intersections of the main reinforcement assemblies, but can also be supported and fixed between intermediate straight portions between the intersections of these main reinforcement assemblies. Furthermore, a formwork is provided by surrounding these main reinforcement assemblies 58 from the left and right with weir plates (not shown). As these weir plates, plywood plates, crimp wire mesh, expanded metal, etc. are suitably used. Finally, add a cement-based hardening material, such as cement milk, into this mold. Mortar concrete etc. are placed. Steel fibers or resin fibers may be mixed into the cement hardening material.

In this way, as the cement-based hardening material hardens, a protection structure, which is a slope structure constructed in a lattice pattern vertically and horizontally, is formed on the slope A. Even if the slope A is an uneven slope, the height of this structure is adjusted by the spacer of the present invention, and the structure exhibits a uniform slope.

〔Effect of the invention〕

As described above, the spacer for a slope according to the present invention can be arranged at the vertical and horizontal intersections on the slope where the slope is to be formed, so that even if this intersection is a recess, it can be placed in a predetermined manner. The height can be adjusted to the height of , and the vertical and horizontal positions for reinforcing bars to be placed to form the legal frame can be determined.

Furthermore, according to the method for constructing a slope structure of the present invention, the height of the spacer can be adjusted on site without having to previously measure the depth of the recess on the uneven slope surface, thereby eliminating the need for troublesome preparation work. do not.

Moreover, by simply determining the height of the slope to be constructed using spacers and placing this spacer on the slope, the vertical and horizontal positions where reinforcing bars should be placed can be determined using this spacer. Therefore, a slope protection structure with a uniform slope can be constructed extremely efficiently.

[Brief explanation of drawings]

FIG. 1 is a perspective view showing a spacer for a legal frame according to the present invention, and FIGS. 2 (A) and (B) are side views showing height adjustment of the spacer for a legal frame according to the present invention, respectively. FIG. 3(A) is a side view showing the method for constructing the slope protection structure of the present invention, and FIG. 3(B) is a plan view. Figure 4 is a side view showing an example of the use of a conventional spacer for a legal frame.
FIGS. 5A and 5B are perspective views showing examples of conventional spacers for a legal frame, respectively. 10... Spacer for the legal frame; 11... First upper end reinforcement;
12... Second upper end reinforcement; 13... First lower end reinforcement; l
4... Second lower end reinforcement; 15... Upper frame: 16
... Lower frame: l7 ... Height adjustment strut; 2
1, 22, 23... recess; 24, 24'... first
Upper main reinforcement; 25...First lower main reinforcement. 26.26
', 27.27°. 28.28'... Second upper main reinforcement; 58... Main reinforcement assembly; 60... Hoop muscle.

Claims (2)

[Claims] (1) A first top reinforcement made of at least two reinforcing bars arranged in parallel, and a second top reinforcement made of at least two reinforcing bars arranged in parallel so as to intersect the first top end reinforcement in a grid pattern. The second upper end reinforcement forms an upper frame, and the first upper end reinforcement consists of at least two reinforcing bars that are arranged below the upper frame at an appropriate interval and extend in the same direction as the first upper end reinforcement. A lower frame is formed by a lower end reinforcement and a second lower end reinforcement made of at least two reinforcing bars arranged in parallel so as to intersect the first lower end reinforcement in a lattice pattern, and an upper frame is further configured. It spans between the intersection of each reinforcing bar that makes up the lower frame and the intersection of each reinforcing bar that makes up the lower frame to form a column that extends downward along a direction perpendicular to each reinforcing bar, and the height of the column can be adjusted. A spacer for slope protection, characterized in that it supports a slope protection formwork. (2) The spacers for the slope according to claim 1 are arranged at predetermined intervals on a slope having unevenness, respectively, and the height of the supports of the spacers is adjusted to set the spacers at predetermined positions. The spacer is then held at a height of
Each lower frame is supported by at least two lower main reinforcements made up of long reinforcing bars that span vertically and horizontally, and these upper main reinforcements and lower main reinforcements form a main reinforcement assembly, and the main reinforcements extend from each spacer in all directions. A method for constructing a slope protection structure, characterized in that a formwork is formed by surrounding a main reinforcement assembly with weir plates from left and right, and a concrete-based hardening material is poured into the formwork.