JPH0481006B2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] This invention is constructed as an earth retaining device to prevent the collapse of a slope (slope) or a slope protection device to prevent weathering and erosion of the slope. This invention relates to a lattice-like frame structure.

[Conventional technology]

BACKGROUND ART Conventionally, a lattice-shaped slope structure has been constructed on a slope as the above-mentioned earth retaining or slope protection. The method for constructing this slope structure is to arrange and assemble a frame made of deformable materials such as wire mesh and cardboard on the local slope, install reinforcing bars, and then pour concrete to create a grid on the slope. There is a pour-on-site method for constructing a slope-shaped slope structure.

In addition, with the above-mentioned on-site cast-in-place method, it is difficult to arrange the formwork on the slope and assemble the reinforcing bars, resulting in poor workability.In order to improve this, the steel pipes are covered with concrete. There is a construction method in which beam members are manufactured in advance in a factory and then assembled on-site in a grid pattern as vertical and horizontal beams (Japanese Patent Laid-Open No. 48-62205
(see issue). This construction method is shown in Figures 11, 12, and 1.
Shown in Figure 3. 1 is a vertical beam, 2 is a horizontal beam, both are
The periphery of a steel pipe 3 serving as a core material is covered with concrete with both ends exposed. 4 is a steel joint. These are all pre-manufactured in a factory, and the construction method involves connecting vertical beams 1 and horizontal beams 2 in a lattice-like manner through joints 4 on the slope at the site, and anchoring them at the 4 joints at the intersections of the lattice. The joint 4 has gutter-shaped receiving flanges 4b welded and fixed on the left and right sides of the cylindrical main body 4a, and anchor holes 4c are formed.
A stopper 4d is provided for positioning the tip of the vertical beam 1, and the tip of the vertical beam 1 is inserted into the cylindrical body 4a and fixed by welding, and the horizontal beam 2 is placed on the left and right gutter-shaped receiving collars 4b and fixed by welding. Furthermore, the upper rib 4e is welded as shown in FIG.

[Problem that the invention seeks to solve]

The above-mentioned method using conventional beam members is superior in that it is easier to construct and can shorten the construction period compared to the cast-on-site method of pouring beams. Since the lattice-like slope frame structure is constructed by welding and connecting, the slope surface must be flat, and if the slope ground has undulations (unevenness), the ground will be cut down and the ground leveled. I need to do something. In addition, if the slope is a curved surface that is curved in the horizontal direction of the slope, it is necessary to use a joint with a connection angle that corresponds to the curved surface, but this is complicated and it is difficult to It is not easy to deal with the shape of the slope. In addition, in the on-site casting method, the formwork can be assembled according to the slope of the site, so the above-mentioned cutting and leveling of the ground is not required, but as mentioned above, the construction is time-consuming.

The present invention has been made in view of the above-mentioned conventional problems, and provides a slope frame structure that is easy to construct and can easily accommodate the ups and downs of the slope ground, curves in the lateral direction of the slope, etc. The purpose is to

[Means for solving problems]

In order to solve the above-mentioned problems, the present invention provides a legal frame structure in which vertical beams and horizontal beams are connected in a lattice shape through joints, in which the vertical beams are rigidly connected to the joints, and the horizontal beams are rigidly connected to the joints, and the horizontal beams are rigidly connected to the joints. Hinged to the joint.

[Effect]

In the slope structure having the above configuration, since the cross beams are hinged to the joints, it is flexible and can easily accommodate the ups and downs of the slope ground, curves in the lateral direction of the slope, etc. Therefore, a lattice-like legal frame structure can be constructed without cutting down the ground and leveling the ground.

〔Example〕

Embodiments of the present invention will be described below with reference to FIGS. 1 to 10.

FIG. 5 shows a perspective view of an embodiment of the legal frame structure 10 constructed on an inclined surface. This legal framework structure (hereinafter referred to as
10 is a cross beam 11 made of a rectangular steel pipe that has been subjected to anti-corrosion treatment, and a vertical beam 12 connected to a joint 13.
This is a lattice-like legal frame structure formed by connecting in a lattice shape through the lattice-like structure. In FIG. 5, reference numeral 14 indicates a cover plate that covers the joint 13, and reference numeral 15 indicates an anchor steel rod that is driven into the ground.

The present invention is characterized by the connection structure between the cross beam structure 11 and the joint 13. As shown in FIGS. 1 to 3, which are enlarged views of the joint 13, this joint 13 is made by welding four brackets 17 made of bent plates to a joint main body 16 made of a short round steel pipe.
Cross beam joints 1 are provided on opposite sides of the joint body 16.
7a, vertical beam joint portions 17b are formed on both side surfaces in a direction orthogonal to this. In this embodiment, a square steel pipe relay member 18 is rotatably attached to the cross beam joint 17a via a shaft 19 that extends in the vertical direction of the slope (in the direction of arrow (A) in FIGS. 1 and 5). The end of the cross beam 11 is rotatably connected to this intermediate member 18 via a shaft 20 that is perpendicular to the slope. Note that bolts are used as the shafts 19 and 20. Further, the longitudinal beam 12 is fitted into the longitudinal beam joint portion 17b and fixed with two bolts 21 as shown in FIG.

To explain the procedure for constructing the above legal frame 10,
Horizontal beam 11, vertical beam 12, joint 13, intermediate member 1
Each component, such as No. 8, is manufactured in advance at a factory and transported to the site. First, the horizontal beams 11 and the vertical beams 12 are connected in a lattice shape via joints 13 on a slope. In this case, a relay member 18 is connected to the joint 13 in advance via a shaft 19, and the cross beam 11 is connected to this relay member 18 via a shaft 20. The longitudinal beam 12 is fitted into the longitudinal beam joint portion 17b of the joint 13 and fixed with two bolts 21. As a result, the horizontal beam 11 is hinge-coupled to the joint 13 so that it can rotate around an axis 19 in the vertical direction of the slope, and can also rotate around an axis 20 that is perpendicular to the slope. 13 to form a rigid connection.

Thereafter, the ground is bored at the center of the cylindrical joint body 16, the anchor steel rod 15 is inserted, and grouting agent is injected to perform anchor construction.
In this embodiment, as shown in FIG. 4, the joint 13 is covered with a cover plate 14 having a hole through which the anchor steel bar 15 is passed, and then tightened with a nut 22 screwed into the threaded part at the upper end of the anchor reinforcing bar 15. The plate 14 is fixed by using the nut 22, and an anti-corrosion cap 23 is placed over the nut 22. And inside the grid (5th
Area (b) in the figure is usually covered with soil, covered with vegetation, or laid with concrete panels.

In addition, when the above-mentioned legal frame 10 is used to prevent slope collapse in a steeply sloped area, as shown in FIG. 6, a concrete anchor body 15a is formed at the lower end of the anchor steel rod 15. It is a part of the structure that can withstand the pull-out force in the direction of the arrow in the figure.

Further, in the case of the purpose of protecting a gentle slope, the anchor rod 15a is not formed because the anchor steel rod only needs to receive the sliding force along the slope.

In the above-mentioned slope construction method, if the slope surface has undulations (unevenness) or if the slope surface is curved in the horizontal direction, the horizontal beam 11 is centered on the axis 19 that extends in the vertical direction of the slope surface. rotatable as, and
It can be rotated around an axis 20 that is perpendicular to the slope, and has the flexibility to change the connection direction according to the undulations of the slope, etc., so it can cut down the slope,
It can be constructed as is without leveling the ground. Therefore, significant labor savings are achieved and the construction period is shortened. In addition, each longitudinal beam 12 is rigidly connected by a joint 13 and receives rear earth pressure as a structural member, and the horizontal beam 11 is mainly used to hold down the earth between the longitudinal beams and the vertical beam 1.
It is used to function as an auxiliary material for preventing tilting. Therefore, there is no structural problem in the fact that the cross beam 11 is hingedly connected to the joint 13.

In addition, the frame 10 of the embodiment not only does not require welding to connect the joint 13 and the horizontal beam 11, but also uses bolts to connect the vertical beam 12 and the joint 13.
Since nuts are used, there is no welding work required to connect the longitudinal beams 12, making assembly work extremely easy. However, the longitudinal beam 12 and the joint 13 may be joined by welding.

Further, in the embodiment, since steel pipes are used as the horizontal beams 11 and the vertical beams 12, they are significantly lighter than beam members coated with concrete, and assembly work is easier. However, it is of course possible to use horizontal beams and vertical beams whose main parts are made of concrete, as long as both ends have a connection structure as in the embodiment.

In the embodiment, the cross beam 11 is hingedly connected to the joint 13 using the intermediate member 18 so as to be rotatable in two directions, but it may be hingedly connected so as to be rotatable in only one direction. For example, as shown in FIG. 8, the cross beam 11 may be directly connected to the cross beam connecting portion 17a of the bracket 17 by a shaft 19 extending in the vertical direction of the slope without using any intermediate member.

FIG. 9 shows another embodiment of the joint.
The joint 30 of this embodiment has an anchor insertion hole 31a in a joint body 31 made of a rectangular steel pipe sized to fit inside the longitudinal beam 12, and brackets 32 for connecting the horizontal beams are welded to both sides in the left and right direction of the slope. be. In this embodiment, the transverse beam 11 is hinged to a transverse beam coupling bracket 32 rotatably in two directions by shafts 19 and 20 using an intermediate member 18, similar to the embodiment shown in FIG. Main body 31
and fix it with two bolts 21.

FIG. 10 shows yet another embodiment of the joint. In the joint 40 of this embodiment, four plates are assembled in a square shape and welded to form a joint main body 41. A horizontal protrusion 41a of the joint main body 41 is used as a bracket for connecting the cross beam, and a vertical protrusion 41b is used as the joint body 41. is used as a bracket for connecting longitudinal beams. Further, the cross beam 11 is directly hinged to a cross beam coupling bracket 41a of the joint 40 via a shaft 19. Further, the longitudinal beam 12 is fitted into the longitudinal beam coupling bracket 41b of the joint 40 and fixed by tightening with bolts 21, as in the embodiment shown in FIG.

〔Effect of the invention〕

As explained above, the present invention provides a slope structure in which vertical beams and horizontal beams are connected in a lattice shape through joints, in which the vertical beams are rigidly connected in the vertical direction of the slope of the joint, and the horizontal beams are rigidly connected to the slope of the joint. Since the hinges are connected in the left and right direction of the slope, there is flexibility in connecting the cross beams and joints.
It can easily accommodate the ups and downs of the sloped ground, curves in the horizontal direction of the slope, etc., and it is possible to construct a slope frame structure without cutting down the sloped ground and leveling the ground. This resulted in significant labor savings and a shortened construction period.

In addition, when using anti-corrosion treated steel pipes for the horizontal and vertical beams, the weight of the components can be reduced.
Furthermore, when bolts and nuts are used to connect the longitudinal beams and the joints, there is no need for welding work that requires skilled workers, making assembly even easier.

[Brief explanation of drawings]

FIG. 1 is a front view of the vicinity of the joint of a legal frame structure according to the first embodiment of the present invention, FIG. 2 is a cross-sectional view taken along the line -- in FIG. 1, and FIG. 3 is a cross-sectional view taken along the line -- in FIG. Figure 4 is a - line sectional view after the anchor construction in Figure 1, Figure 5 is a perspective view of the legal frame structure, Figure 6 is an example of how the legal frame structure is used shown in the ground cross section, and Figure 7 The figure shows another example of use, also shown in the ground cross section, Figure 8 is a front view of a joint part showing another embodiment, Figure 9 is a front view of a joint part showing still another embodiment, and Figure 10. 11 is a front view of a main part of a conventional legal frame structure, FIG. 12 is an enlarged front view of the joint in FIG. 11, and FIG. 13 is a front view of a joint showing another embodiment. is a perspective view of the same joint. 10... Law frame structure, 11... Horizontal beam, 12... Vertical beam,
13...Joint, 16,30,40...Joint body,
18... Intermediate member, 19, 20... Shaft, 21... Bolt.

Claims (1)

[Scope of Claims] 1. A legal frame structure formed by connecting vertical beams and horizontal beams in a lattice shape via joints, wherein the vertical beams are rigidly connected to the joints, and the horizontal beams are hinged to the joints. A legal frame structure characterized by the following. 2. The slope frame structure according to claim 1, wherein the horizontal beam is hinged to the joint so as to be rotatable about an axis that extends in the vertical direction of the slope. 3. The slope frame structure according to claim 1, wherein the cross beam is hinged to the joint so as to be rotatable about an axis perpendicular to the slope.