JPS601442B2 - Emergency bridge construction method - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an emergency bridge construction method that can be constructed on a repaired floor surface of, for example, an expressway.

Today's road construction technology is far superior to what we could have expected from the technology of the past. One example of this is improving the durability of road surfaces. However, such highly durable road surfaces are also used on arterial roads, which are frequently used (traffic).
For example, on the Tomei Expressway, etc., the degree of deterioration is so great that it is difficult to carry out further repairs. Therefore, there is a strong demand for the introduction of superior technology to further strengthen road surface durability, but currently, the only way to deal with the deterioration of the road surface on roads currently in use is to rely on repair work. .

However, many of the restoration techniques used today are parallel restorations,
In other words, we are exploring construction methods such as one-sided construction and one-sided traffic. This is very convenient in terms of transporting various materials for construction, but since only one-way traffic is allowed, traffic congestion occurs on busy roads, which is dangerous and reduces work efficiency, which slows down the construction period. There were various problems such as the length of the project and the construction costs that naturally increased. This invention was made in order to solve the various problems in the above-mentioned parallel repair, and its purpose is to install an emergency bridge with the same number of lane widths on the road surface in need of repair, which would cause traffic congestion. The object of the present invention is to provide an emergency bridge construction method that can efficiently repair the road surface on the underside of an emergency bridge. Hereinafter, one embodiment of the present invention will be described in detail with reference to the drawings. FIG. 1 shows the overall configuration of an emergency bridge according to the present invention.

This emergency bridge 1 is constructed with three main pony truss sides 2, 2, 2, and the lower part of the span of each main truss 2, 2, 2 is supported by supports 3,... has been done. Moreover, each of the kings 2, 2, 2 is divided into multiple spans, and each of these span main sides 2a, 2b, 2c...2a
are integrated by pin connection as described later. In addition, each of the supports 3 is configured to have a fixing means for obtaining a support reaction force by jack operation and a caster-type traveling function using tires, as will be described later.
Each of the main cross sections 2, 2, 2 can be dispatched and transported onto a predetermined repaired road surface. Next, the specific configuration of each part of the above-mentioned emergency bridge 1 will be explained with reference to FIGS. 2 to 12. First, Figure 2 shows the side configuration of each span main twill 2a, 2b, and 2c. The upper mechanism, lower mechanism, and truss machine are all made of Japanese steel, and each side is equipped with high-tension bolts ( (hereinafter abbreviated as T.B.).

And each span main engine 2a assembled as above,
2b and 2c are strongly connected to each other via connecting fittings 4a and 4b shown in FIGS. 5A and 5B, and by a pin 5. The connecting fittings 4a, 4b and the pin 5 are provided, for example, at a portion indicated by an imaginary circle x in FIG.
The following Figure 3 shows the cross beam supports 6 that are protruded at appropriate intervals from the lower horizontal groove sides of each of the span girders 2a, 2b, 2c.
This shows the planar configuration of the crossbeam support 6.
A pin hole 6a is provided at the top and bottom of the tip of the pin hole 6a, and as shown in FIG. Each is provided.

The following Fig. 6 shows the configuration of the cross beam 7 attached to each of the above-mentioned cross beam supports 6. H-shaped steel is used for this cross beam 7, and both ends are attached to the cross beam supports 6. Groove 6 of girder support 6
A protrusion 7a is provided to be braced with b..., and a pin hole 7b facing upward and downward is provided in the protrusion of the parenthesis.

Note that in FIG. 6, the one-sided configuration is omitted. The cross beams 7 configured as described above are connected to straddle the respective truss main sides 2, 2, 2, which are erected on the left and right sides, so as to be rotatable in the lateral direction. Therefore, the cross beams 7 and 7 connected astride in this way
... can be deformed so as to narrow the width while keeping the opposing truss main rods 2, 2, 2 parallel. The following Figure 7 shows the structure of the steel deck slab 8 that is attached to the above-mentioned cross beams 7 in a manner that allows it to rise and fall freely. ), and the left and right steel deck slabs 8 are attached above the connecting portions of the cross beams 7 via binge fittings 9 so as to be able to rise and fall freely. Note that one side of the hinge fittings 9 is fixed to a fixed floor slab 10 constituting both wings of the floor. In the figure, numeral 11 is the crossbeam 7 connecting pin. The following FIG. 8 shows the undulation structure of the left and right steel deck slabs 8, 8, and also shows the specific structure of the support 3 mentioned above. First, the left and right steel deck slabs 8, 8 are designed to undulate from the state shown by the solid line in the figure to the state shown by the imaginary line (the undulation mechanism is omitted), and in the down state, the crossbeams 7...・It is designed to be stably and strongly supported by. On the other hand, the support 3 (only the right side is shown in the figure) is attached so that the spindle of the caster 3a (consisting of 8 tires) is located directly below the truss main side 2, and the neck of the caster 3a is attached to the frame. A fixed base 3b according to the configuration is attached. Also, jacks 3c are attached below the four corners of this fixed base 3b, and are operated (extended) for fixing, and absorb the entire weight that was hitting the caster 3a via the reaction force base 3d. It is designed to support the other side. Further, a guide rail 12 extending, for example, in the width direction on the left side in the figure is attached to an appropriate position below the cross beam 7, and a hoist 13 or the like is configured to suspend and transport required materials. In this embodiment, the installation position of the guide rail 12 is described as being only in the width direction, but it may be installed along the span direction, and since it is possible to install it in various ways for work efficiency, only the above example is applicable. It is not particularly limited to. In the figure, 14 is a road surface that requires repair. The following FIG. 9 shows the side structure of the support 3 and also shows the fixed state of the casters 3a and the fixed base 3b.

First of all, the support 3 itself is, for example, the truss main horizontal 2,
2, and is installed directly under the connecting part of the fixing base 3b.
The two ends of the main truss are designed so that the ends of the two sides can be equally spaced. Further, the casters 3a have a front-to-back structure that allows for stable running. Further, the load on the caster 3a becomes lighter as the reaction force tables 3d stacked in multiple stages move, and eventually becomes almost unloaded. The following Figures 10 to 12 show the configuration of the approach girders 15 installed at both ends of the main truss sides 2, 2, 2 (see Figure 1) after they have been erected, and the state in which they are attached. be. A plurality of approach girders 15 are arranged along the longitudinal direction, and a checkered plate 16 is attached to the surface of the approach girder 15.
It consists of 7. In this embodiment, the approach steel deck slab 17 is formed into three parts in the width direction, and several types of approach steel deck slabs 17 having different inclinations are provided according to the approach inclination. FIG. 10A shows the approach steel deck slab 17 for installation in the middle part, and FIG. 10B shows the main part of the third type approach steel deck slab 17 extending to the end. FIG. 11 shows the structure of the connection part of the approach steel deck slab 17. As shown in this figure, the end of each approach steel deck slab 17 is provided with a notch 17a according to the slope of each part, and this cutout part Approach cross beams 17b having different heights are attached to the portion 17a. FIG. 12A shows a plan view of the approach steel deck 17 having the above-described configuration. FIG. B shows a cross-sectional configuration of the approach steel deck 17 in the width direction. The approach steel deck 17 installed at the approach end is held down by an end plate (not shown) to prevent it from slipping during use, and is held onto, for example, the road surface in need of repair 14 via this end plate. It is designed so that Hereinafter, the construction method of the present invention will be explained using the above-mentioned configuration, and the functions of each part will be explained.

First, the construction method is as follows. ■ Temporary yards will be constructed along roads requiring repair.

■ Bring the required materials onto the yard. ■ Place supports on the yard.

■ Set the main side of the truss and stand it on the support mentioned above.

■ Deliver the cross beams between the left and right truss main transverse spaces and connect them using the connecting piso.

■ Deliver the steel deck slab onto the cross girder and install it with binge fittings so that it can be raised or lowered.

(Upright state) ■ Narrow the width between the left and right main crossbars by rotating the crossbeams by a predetermined angle.

■ The main side constructed above will be transported from the yard to the road surface requiring repair using a towing vehicle.

■ Expand the width of the above royal structure.

■ Lay down the steel deck that is in an upright position.

■ Fix the support using a jack.

■ Repeat each of the above steps to construct the main part of the bridge of a predetermined length. ■Finally, approach steel deck slabs are set in the front and rear to complete the entire construction.

Next, the function of each part of the emergency bridge 1 constructed according to the above-mentioned construction method will be explained.

First, as stated in the purpose of this invention, the purpose of this invention is to efficiently repair a road surface in need of repair without causing traffic congestion. ) is supposed to be done on.

During assembly on this yard, supports 3 are arranged at predetermined span intervals. Support 3 in this case is caster 8a grounded.
Between these front and rear supports 3, a pair of left and right truss main rods 2, 2, in which a lower mechanism, an upper mechanism, and a truss machine are set by J.T.B., are erected and straddled.
Next, a plurality of cross beams 7 are installed between the two truss main cross beams 2, 2.
...is set astride. The set of the cross beams 7 is carried out between the cross beam supports 6 provided protrudingly from the opposing surfaces of both main horizontal beams 2, 2, and is continuous. is performed by the connecting pin 11. Therefore, each transverse girder 7... and the left and right truss main transverses 2 and 2 were set.
constitutes a parallel link, and by rotating the respective girders 7 by a predetermined angle, the relative distance between the truss main laterals 2 and 2,
In other words, the width can be narrowed. As the next step, the fixed deck slab 10 constituting the side floor section is first carried in and fixed on the cross beam 7, and then the steel deck slab 8, which is a movable deck, is installed. are carried in sequentially, and the fixed floor slab 1
0 and is set by the binge metal fitting 9. Each of the steel deck slabs 8 set in this way stands up from the state lying down on the floor, that is, as shown in the imaginary line shown in Fig. 8, and the width between the truss main engines 2, 2 is narrow For example, the first
And the second and third span main laterals 2a, 2b, . . . are towed and transferred from the yard to the road surface 14 requiring repair. Since this transfer is performed by the casters 3a of the support 3, the transfer can be carried out extremely lightly and quickly like normal trailer towing. Then, the first vehicle was towed onto the restoration road surface 14.
and the second span main twill 2a, 2b...
By fixing the supports 3, the entire load is transmitted to the road surface and supported stably and strongly through the supports 3.

This fixed set of support 3 is attached to the fixed base 3b, and by the extension operation of the jack 3c..., the reaction force base 3d
Since the work is done through the support, the work can be done extremely quickly compared to installing and supporting shoring each time.
Each truss king 2 is sequentially transferred and fixed in this way.
, 2 are completed as an emergency bridge 1 via connecting fittings 4a and 4b which are connected by inserting pins 5. The approach steel deck slab 17 may be set after the assembly of the main truss main sides 2, 2, etc., which is the main body, is completed, or it may be set while sequentially moving from the front side to the front side. It is possible to do whatever you want. The emergency bridge 1 is assembled as described above.
Since a guide rail 12 is provided on the lower surface of the frame, for example, in the width direction and in the span direction, the suspended hoist 13 can be used effectively when carrying out and carrying in repair materials, thereby facilitating repair work. can be performed more efficiently. Although the casters used in the above embodiments are not equipped with a self-propelling mechanism, the advantage of using these with a self-propelling mechanism is that they can be transported quickly, improving work efficiency and shortening the construction period. There is.

Since the present invention has the above-described structure and operation, each part can be assembled and configured very easily and quickly. Furthermore, since the width of the vehicle can be adjusted for transportation, it can be towed to a designated location without interfering with other traffic. Furthermore, regarding installation, the load on the casters is transmitted to the reaction force table via a fixed table and a jack, and this is supported on the road surface, so it can be installed very strongly and stably. In addition, since a guide rail is attached to the underside of the emergency bridge and a hoist is provided, it has various excellent effects such as being able to bring in and release repair materials extremely quickly and improve the efficiency of work.

[Brief explanation of drawings]

FIG. 1 is a side view showing the overall configuration of the emergency bridge according to the present invention, FIG. 2 is a side view showing the main structure of each span main side,
Figure 3 is a plan view showing the lower mechanism, Figure 4 is a side view showing the crossbeam support structure, Figures 5A and B are front and side views showing each span main horizontal connection fitting, and Figure 6 is a side view. Plane showing girder configuration,
Side and sectional views, Figure 7 is a sectional and plan view showing the installed state of the steel deck slab, Figure 8 is a sectional view of main parts showing the main span width direction configuration and support configuration, and Figure 9 is the caster configuration. Figures 10A and B are cross-sectional views showing the structure of the approach steel deck, Figure 11 is a cross-sectional view showing the support structure of the approach steel deck, and Figures 12A and B are cross-sectional views of the approach steel deck. FIG. 2 is a plan view and a cross-sectional view. 1... Emergency bridge, 2... Truss structure, 3.
...Support, 4a, 4b...Connection fittings, 5
...Pin, 8...Steel deck plate, 9...
...Pinge fittings, 10...Fixed floor slab, 11...
...Connecting pin, 17... Approach steel deck slab. Figure Vessel Diagram N Vessel Diagram 〇 Vessel Figure 4 Figure 5 Figure 6 Figure 7 Figure 9 Figure 〇 Vessel Diagram 〇 Ship Chart Vessel Diagram N Rudder

Claims (1)

[Claims] 1. Place multiple supports equipped with fixing means and running functions on a temporary yard along the road scheduled for restoration, place the left and right truss main structures on these supports, and install pins between both truss main structures. A plurality of cross beams are set by joining, and then steel deck slabs, which are hinged on the left and right truss main structure sides on the left and right truss main structure sides, are attached to the cross girders to form a span main structure with a predetermined span length. After the steel deck slab is erected, the cross beams are rotated by a predetermined angle to narrow the mutual spacing (width) between the two truss main structures, and then transported from the yard to the road requiring repair by a towing vehicle and brought to the repair point. An emergency bridge construction method characterized in that the support platform is fixed by a fixing means, and subsequent span main structures that are sequentially assembled and transported are connected with pins to construct a bridge of a predetermined length.