JPH026081Y2 - - Google Patents

Description

[Detailed description of the invention] "Industrial application field" This invention is suitable for use when temporarily forming the road surface after road excavation, for example, when underground construction work such as a subway or an underpass is carried out under the road. This is related to the road surface lining version.

``Prior art'' When carrying out various types of underground construction work under a road, if it is impossible to maintain the function of the road because the work reaches just below the road surface, the road itself is also excavated to remove it. After that, the commonly used method is to construct supports and girders using structural steel, etc., and then place so-called lining plates such as flat iron plates or concrete plates on top of them to form a temporary road surface. has been done.

``Problem that the invention aims to solve'' By the way, as mentioned above, this type of lining board is placed on the girder and serves as a temporary road surface until the construction is completed, and it is difficult to install, remove, or relocate it. Since this work is frequently performed, it is required that the material be extremely strong and sufficiently lightweight. Also, from the perspective of the construction environment, consideration should be given to not causing any inconvenience to the workers or nearby residents.

Considering these points, conventional lining plates using flat iron plates have problems such as loud noise and slip accidents when vehicles are running.
Furthermore, lining plates using slab plates have problems in that they are relatively heavy, have strength problems, and are prone to cracking.

"Means for Solving the Problem" In this invention, a flat box-shaped body frame with an open top is formed by a bottom plate, both side plates, and both end plates, and a flat box-shaped main body frame with an open top surface is formed. Hollow box-shaped longitudinal girders and cross girders are provided respectively, and the required number of dowels are placed at intervals on the bottom plate of the main body frame, and necessary main reinforcements, distribution bars, etc. are installed within the main body frame. A reinforcing steel material is provided, compartments are formed in hollow portions at both ends of the longitudinal girder, and an opening is provided in the bottom plate to communicate with the compartment from within the main body frame, and within the main body frame and the compartment, The structure was constructed by pouring expandable concrete containing an expanding agent.

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

Figure 1 shows a plan view of the entire road surface lining before concrete placement, and Figure 2 shows a partial cross-sectional side view after concrete placement. frame, code 2
The symbols 3 and 3' are vertical and horizontal beams.

The main body frame 1 includes a bottom plate 1a, side plates 1b, 1
b, and both end plates 1c, 1c, to form a flat rectangular box shape with an open top surface, and on the bottom plate 1a, a plurality of dowels 4 are arranged at appropriate intervals in the length and width of the bottom plate 1a. . In the embodiment shown in the figure, each of these dowels 4 is a so-called cut-up type dowel. In addition, the main frame 1
Inside, necessary reinforcing steel materials such as main reinforcements 5 and distribution reinforcements 6 are arranged in a grid pattern. Further, the upper edges of both side plates 1b, 1b and both end plates 1c, 1c of the main body frame 1 are each bent inward by approximately 90 degrees to form horizontal band-shaped edge plate portions 1b', 1c', respectively. The edge plate parts 1b', 1c' are fixed to the bottom plate 1a via swash plates 7 arranged intermittently along the edge plate parts 1b', 1c' (both ends of the swash plate 7 are fixed by welding). (fixed).

As clearly shown in FIGS. 3 and 4, the longitudinal beam 2 is formed into a hollow box shape, and extends in the longitudinal direction ( Two of them are provided so as to extend parallel to each other in the vertical direction. Between the longitudinal girders 2, 2 and on the lower surface of the bottom plate 1a, there are also hollow box-shaped transverse girders 3, 3, 3 and L-shaped cross-section transverse girders 3', 3'. A total of five of them are provided, extending in the direction between the vertical beams 2, 2 (horizontal direction). These vertical beams 2, 2 and the horizontal beams 3' at both ends,
3' are both provided at positions slightly inward on the lower surface of the main body frame 1. Further, the horizontal beams 3', 3' located at both ends are formed to have the same height dimension as the vertical beams 2, 2, and the remaining horizontal beams 3,
3 and 3 are formed to have a smaller height dimension.

A rubber plate 9, which is placed on one side of the upper surface of a horizontal beam 8 made of shaped steel or the like, is attached to the lower surfaces of both ends of the longitudinal beams 2, 2 via sole plates 10, respectively. Further, on the lower surfaces near both ends of the longitudinal girders 2, 2, as shown in FIG. , a stopper 11 is provided for preventing displacement in eight directions. In the illustrated example, this stopper 11 is attached by cutting a channel steel or the like into an appropriate length and welding it to the lower surface of the longitudinal girder via a protective plate 12. In addition, each stopper 11 is connected to the longitudinal girder 2 based on the reason described later.
It is installed at a position closer to the inside in the width direction.

On the other hand, hooks 13, 13 for hanging are provided at the center in the width direction near both longitudinal ends of the main body frame 1, respectively. In addition, the above-mentioned both longitudinal girders 2, 2
As shown in FIG.
L-shaped compartments 15 are formed by the L-shaped compartments 15, respectively. Furthermore, the bottom plate 1 on each of these compartments 15
As shown in FIG. 1, each of the compartments 15 is provided with an L-shaped opening 16 (two locations are shown as an example) cut out in a shape corresponding to the planar shape of the compartments 15. The interior is designed to communicate with the compartment 15. In addition, the bottom plate 1a on the crossbeam 3 located at the center is also provided with an opening 17 that communicates the inside of the crossbeam 3 with the inside of the main body frame 1.

Then, expandable concrete C containing an expanding agent is poured into each of the compartments 15 and the center crossbeam 3 through the openings 16 and 17, and expandable concrete C is poured into the main body frame 1. will be established. Expandable concrete C is a concrete that has the property of expanding and hardening due to the action of an expanding agent. Examples of suitable expanding agents to provide this characteristic include Denka CSA and Asano Dibucal (all trade names). can be mentioned.

In the road surface lining constructed as described above, the expandable concrete C cast inside the main body frame 1, each compartment 15, and the center crossbeam 3 gradually expands until it hardens. However, due to the restraining action of the main body frame 1, the concrete C is subjected to a compressive action, and as a result, so-called prestress is substantially introduced into the concrete C after hardening. .
Therefore, a road surface lining with a concrete layer in such a state is extremely strong and less likely to cause cracks. Here, the reinforcing steel materials such as the dowels 4, main reinforcements 5, distribution reinforcements 6, etc. on the bottom plate 1a not only have the effect of simply reinforcing the concrete C and strengthening its adhesion, but also have the effect of resisting the expansion action until the concrete C hardens. This results in an effect of effectively assisting the introduction of prestress into the concrete C due to the restraining action from the outside of the main body frame 1. Furthermore, since the concrete C in the main body frame 1 hardens together with the concrete C in each compartment 15 and the central cross beam 3, the concrete C in the vertical beams 2, cross beams 3, 3' also exerts a restraining action, and for these reasons, the road surface lining plate after concrete C has hardened has both longitudinal girders 2, transverse girders 3,
In addition to the strength of 3' itself, it becomes extremely strong.

In addition, most of the longitudinal girders 2 and cross girders 3 are hollow, so they are relatively lightweight and easy to handle.Moreover, the road lining shown in the example is mainly made of concrete. , it is less likely to generate noise like a regular road surface. In addition, since the concrete C is placed inside each compartment 15 and is integrated with the concrete C in the main body frame 1, the part directly below each compartment 15 has a horizontal girder as shown in FIG. Even if a live load is applied to the lining plate while it is placed on the lining plate, it exhibits sufficient strength to withstand this load. Furthermore, since the stopper 11 is welded to the lower surface of the longitudinal girder, there is no fear that it will fall unnecessarily due to corrosion or the like.

"Effects of the Invention" As detailed above, the road surface lining according to the present invention forms a flat box-shaped main body frame with an open top surface by a bottom plate, both side plates, and both end plates, and the bottom plate of this main body frame Hollow box-shaped vertical beams and cross beams are respectively provided extending vertically and horizontally of the main body frame, and the necessary number of dowels are arranged at intervals on the bottom plate of the main body frame, and main reinforcements are installed within the main body frame. and necessary reinforcing steel materials such as distribution bars, furthermore, compartments are formed in hollow parts at both ends of the longitudinal girder, and in the bottom plate,
An opening communicating from the inside of the main body frame to the compartment is provided, and expandable concrete containing an expanding agent is poured into the main body frame and the compartment, so the overall structure is extremely strong. In addition, it can be made sufficiently lightweight, which makes installation, removal, or relocation work easier.Also, since the upper surface that becomes the road surface is made of concrete, noise is less likely to be generated. As a result of introducing prestress into the concrete, it has the excellent effect of being able to withstand severe use as a lining plate without cracking or the like.

[Brief explanation of the drawing]

Figures 1 to 4 show an embodiment of the present invention, in which Figure 1 is a plan view, Figure 2 is a partially sectional side view, and Figure 3 is a sectional view taken along the line - in Figure 2. , FIG. 4 is a partially sectional end view. 1...Main frame, 1a...Bottom plate, 1b...Side plate,
1c... End plate, 2... Longitudinal beam, 3, 3'... Cross beam,
4... Jibel, 5... Main reinforcement, 6... Distribution reinforcement, 14
... Partition plate, 15 ... Compartment, 16, 17 ... Opening, C ... Expandable concrete.

Claims (1)

[Scope of utility model registration request] A main body frame formed into a flat box shape with an opening on the top surface by a bottom plate, both side plates, and both end plates, and a hollow box-like shape provided along the bottom surface of the bottom plate of the main body frame to extend vertically and horizontally of the main body frame. A longitudinal girder and a transverse girder, a plurality of dowels arranged at intervals on the bottom plate of the main body frame, reinforcing steel materials such as main reinforcement and distribution reinforcement arranged in the main body frame, and the vertical girder. compartments formed in hollow parts at both ends of the girder; openings formed in the bottom plate to communicate the compartments and the interior of the main body frame; A road surface lining made of expandable concrete.