JPH0549769B2 - - Google Patents

Description

[Detailed Description of the Invention] [Object of the Invention] Industrial Application Field The present invention relates to a method of constructing a bearing plate in which a large concrete plate is fixed to an anchor bolt driven into the ground. .

Conventional technology Conventionally, as a construction method for constructing this type of bearing plate, as shown in Fig. 6A, a hole is made in a slope 11 cut from a ground 10 with a drill 12 as shown in Fig. 6B. After driving the anchor bolt 13, as shown in FIG. 6C, a formwork 14 made of steel plate, wood, or plastic is attached to the exposed portion 13a of the anchor bolt 13, and a fluid hardening material 15 such as concrete or mortar is attached. There is a construction method in which the large plate 16 is formed by casting, hardening, and demolding.

Problems to be Solved by the Invention As described above, the conventional construction methods described above use large, heavy, and difficult-to-handle formwork made of steel plates, etc. Not only is the installation process difficult and time-consuming, but
The concrete had to be removed from the mold after it had been poured and hardened, making the construction work complicated and prolonging the construction period.

In addition, conventional wooden formwork is difficult to reuse, and plastic formwork is expensive.

Furthermore, with conventional formwork, it is necessary to attach a soft material such as rubber to the bottom of the formwork to prevent the flowable hardening material from leaking, and to prevent gaps from forming between the ground and the formwork. There were also problems such as the unit cost of the formwork becoming high and the installation work becoming complicated.

The present invention has been made to solve the above-mentioned conventional problems, and its purpose is to provide a bearing plate construction method that can be constructed quickly and inexpensively, shorten the construction period, and reduce construction costs. Our goal is to provide the following.

[Structure of the Invention] Means for Solving the Problems The method of constructing the bearing plate of the present invention is to drive anchor bolts into the slope of the ground, the excavated surface of the ground, etc., fix them, and arrange the reinforcements in a lattice pattern. The structural reinforcing bar for the plate, which is constructed by integrally attaching a mesh formwork around the reinforcing reinforcing bar for the plate, is tightened and fixed to the exposed part of the anchor bolt, and a fluid hardening material such as concrete or mortar is placed inside the structural reinforcing bar for the plate. It is characterized by filling the outside of the mesh formwork and spraying it on the outside of the mesh formwork to form a large plate to support the ground, and simultaneously spraying and forming the large plate to support the surrounding ground. This method is characterized by spraying the fluid hardening material onto slopes, excavated surfaces of the ground, etc.

Embodiment Hereinafter, an embodiment of the present invention will be described with reference to the drawings.

In FIG. 1, numeral 1 is a ground, a part of which is cut to form a necessary slope 2.

Next, as shown in FIG. 2, a hole is made in the ground 1 using a drill 3, and an anchor bolt 4 is driven into the hole.

Subsequently, as shown in FIG. 3, a plate structural reinforcing bar 5 is attached to the exposed portion 4a of the anchor bolt 4.

As shown in detail in FIG. 3A, the structural reinforcing bars 5 for plates are composed of reinforcing bars 5a for plates and mesh formwork 5b.
It consists of

The plate reinforcing bars 5a are constructed by arranging reinforcing bars in a lattice pattern, and the thickness of the reinforcing bars, the spacing of the lattice, etc. are appropriately set depending on the ground, soil quality, pressure received by the plate, etc.

On the other hand, the net-like formwork 5b is formed by assembling reinforcing bars thinner than the plate reinforcing bars 5a in a fine mesh or fence shape, and forming the whole into a belt shape so as to surround the plate reinforcing bars 5a. Fold it in and make it work. As shown in FIG. 3B, for example, the ends of some of the reinforcing bars of the plate reinforcing bars 5a are bent downward and extended, and then tied to the bent ends 5a' with wires 6 or the like. and become one.

Note that the bent end portion 5 of the reinforcing bar 5a for the plate
If the length a' is set to about 1/2 of the height of the mesh formwork 5b, the bent end 5
By simply aligning a' with the lower end of the mesh formwork 5b, the plate reinforcing bar 5a can be positioned approximately in the middle of the mesh formwork 5b.

After fixing the plate structural reinforcing bars 5 to the anchor bolts 4 as described above, as shown in FIG.
Fluid hardening material such as concrete or mortar 7
Spray. In this case, as shown in FIG. 5, the fluid hardening material 7 is not only filled into the mesh formwork 5b, but also sprayed onto the outer surface of the mesh formwork 5b.
The mesh formwork 5b is buried.

Incidentally, as shown in FIG. 5, the flowable hardening material 7 may be simultaneously sprayed over the entire surface of the slope other than the plate.

In the above embodiment, the structural reinforcing bars for plates were constructed in a square shape, but the structural reinforcing bars for plates used in the construction method of the present invention are not limited to this, and may have any other shape such as rectangular, circular, or rhombic shapes. It may be a shape.

Although the above-mentioned embodiment describes the construction on the excavated surface of the ground, it may also be temporarily constructed on the natural slope of the ground or on the heap of the excavated surface of foundation work.

[Effects of the invention] (1) Since a lightweight and inexpensive structural reinforcing bar for plates is used, which is constructed by integrating a mesh formwork with reinforcing reinforcing bars for plates, it is not only easy to carry in and move, but also quick. And it can be easily fixed to an anchor bolt. Furthermore, since the mesh formwork is a waste formwork, there is no need to remove the mold after concrete is poured, and the construction period can be significantly shortened. Furthermore, since almost no external force acts on the mesh formwork, a simple structure with low rigidity is sufficient, so it can be provided lightweight and at low cost.

(2) In addition to temporary works such as slopes of the ground, excavated surfaces of the ground, and pile stops, it can also be used for slope construction in emergencies such as disaster recovery, and in combination with vegetation construction methods.

[Brief explanation of drawings]

Figures 1 to 4 are construction explanatory drawings that sequentially explain the construction method of the present invention, Figure 3A is a perspective view showing one embodiment of the structural reinforcement for plates, and Figure 3B is a partially enlarged cross section of the structural reinforcement for plates. 5 is a partially cutaway perspective view of a bearing plate installed on a slope, and FIGS. 6A to 6D are explanatory diagrams showing a conventional construction method. 1...Mound, 2...Slope, 3...Drill, 4...
...Anchor bolt, 4a...Exposed part, 5...Structured reinforcing bar for plate, 5a...Reinforcing bar for plate, 5
b...Mesh formwork, 6...Wire, 7...Fluid hardening material.

Claims (1)

[Scope of Claims] 1. Anchor bolts are driven into the slope of the ground or the excavated surface of the ground to fix them, and a mesh formwork is integrally attached around reinforcing reinforcing bars for the plate arranged in a lattice pattern. The structural reinforcing bars for the plate thus constructed are tightened and fixed to the exposed portions of the anchor bolts, and the structural reinforcing bars for the plate are filled with a fluid hardening material such as concrete or mortar, and then sprayed onto the outside of the mesh formwork to form a large-sized material. A bearing plate construction method characterized by forming a plate to support the ground. 2. The bearing plate according to claim 1, characterized in that, at the same time as spraying and forming the large plate, a fluid hardening material is also sprayed on the slope of the surrounding ground, the excavated surface of the ground, etc. construction method.