JPH04339905A - Mobile bridge and its bridging method - Google Patents

Abstract

PURPOSE:To set the aerial fixed bridge of a long span, regarding mobile bridges for bridges to be mounted on a carrier vehicle and to be moved to an arbitrary place and to be temporarily bridged between river sides or earth space sides. CONSTITUTION:An aerial fixed bridge is composed of guide beams 50, 50' and bridge bodies 40, 4O'. First, over a valley, from one side, the guide beams 50, 50' are connected to each other and are projected to the other side and are grounded to an opposite side. In this manner, two sets of the guide beams 50, 50' are bridged to the valley. After that, the bridge bodies 40, 40' to be road bed sections are arranged between two sets of the guide beams 50, 50' and are suspended from the guide beams 50, 50' to be payed out in order toward the opposite side.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a mobile bridge and a method for constructing the same, which can be loaded onto a transport vehicle and moved to any location to temporarily construct a bridge over a river or a gap in the ground.

0002

[Prior Art] Conventionally, folding type overhead fixed bridges have been described in the literature Jane's Military Logistics, 1989 edition, pages 151 to 152 and 16.
Pages 7 to 168 (Jane's Military
Logistics1989, PP151-152,
PP167-168).

[0003] Regarding a mobile bridge that can be used both as a floating bridge and an aerial fixed bridge, refer to the document Jane's Military Vehicles.
and Ground Support Equipment 1982 edition, pages 68 to 71 (Jane's
Military Vehicles and Gr.
ound Support Equipment 19
82, PP68-71).

[0004] In either case, first, one guide beam is connected from the construction vehicle and projected to the opposite bank, and then both ends of the one guide beam are landed on the ground. Next, the bridge body is sequentially sent out from the construction vehicle along this guide beam and extended to the opposite shore.

[0005] The bridge body is composed of a flat road bed plate and main girders installed on both the left and right sides of the bottom surface, and the bottom surface is opened in an inverted concave shape, and the bridge body has no buoyancy or only a slight buoyancy. It merely has buoyancy. Further, a guide beam for constructing this bridge is provided at the center between the left and right main girders below the track bed plate, and the bridge body is supported so as to straddle the guide beams.

[0006]

According to the prior art, fixed overhead bridges and floating bridges can be installed relatively easily.

However, the above-mentioned aerial fixed bridge has only one guide beam. This single guide beam supports the weight of the trackbed during construction. Therefore, the guide beam becomes large and heavy.

[0008] Furthermore, since the guide beam is installed by protruding from the construction vehicle in a cantilevered state, the amount of protrusion cannot be made very large. For this reason, it is not possible to construct long span overhead fixed bridges.

Furthermore, since there is only one guide beam, it is necessary to maintain sufficient balance in the width direction of the track bed during the construction of the track bed.

A first object of the present invention is to enable the installation of a long span overhead fixed bridge.

Furthermore, since there is only one guide beam in the past,
Because vehicles pass through it, it cannot be installed at a higher position than the top of the track bed, and in order to have the track bed land on both banks,
Nor can it be provided in a position where the guide beam protrudes from the lower surface. Therefore, it was necessary to support the track bed section by straddling the guide beams.

For this reason, the track bed cannot be made into a box shape, and the main girders of the track bed are located on both the left and right sides of the guide beam, making it impossible to impart buoyancy to the track bed itself, resulting in a floating bridge. When used as a bridge, a large number of pier boats that generate the necessary buoyancy are placed side by side on the river water surface, and a trackbed section is installed above them, or a cross beam between the left and right main girders and a guide beam for erection are used. There was a problem in that it was necessary to remove the main girder, install separate internal floating bodies in that space, and then install external floating bodies on the left and right outside of the main girder and lower it onto the water.

[0013] Therefore, there was a problem in that a lot of time and manpower were required for erection and removal, and many vehicles were required for transportation.

A second object of the present invention is to impart buoyancy to the bed of an aerial fixed bridge so that it can also be used as a floating bridge. Another objective is to reduce the time, number of personnel, and number of vehicles required for erection and removal in this case.

A third object of the present invention is to make each of the above elements divisible and foldable, to reduce the occupied ground area required for erection, and to reduce the dimensions when transported over land. .

A fourth object of the present invention is to provide a means for supporting a hollow box-shaped track bed with two guide beams and making it movable.

[0017] A fifth object of the present invention is that when the track bed is used in a floating bridge, the above support means can be used to attach an auxiliary floating body, and the buoyancy can be further increased than that of the track bed.
In addition, the object is to be foldable even when the auxiliary floating body is attached, thereby reducing the size when transported on land.

Another embodiment of the present invention is to provide a means for constructing and dismantling the guide beam and the track bed portion, which can reduce the area of land occupied by the riverbank required for constructing and dismantling the guide beam and the track bed.

[0019]

[Means for Solving the Problems] In order to achieve the purpose of long-span construction, the present invention provides a plurality of guide beams that can be connected in the longitudinal direction, and a jack device that supports both ends of the connected guide beams. , a plurality of trackbed parts whose widthwise ends are supported by the connected guide beams and which can be connected in the longitudinal direction, and the connected guide beams are connected to the connected trackbed parts. two sets of jacking devices located at both ends in the width direction, and the jack device has two sets of jacking devices so as to support both ends of each set of the connected guide beams; It is characterized by

[0020] The present invention is characterized in that the track bed has a hollow box-shaped closed structure in order to impart buoyancy to the track bed.

[0021] In order to reduce the occupied ground area required for erection and reduce the dimensions during land transportation, the present invention has the following features:
It is characterized in that the trackbed portion can be connected in the longitudinal direction and folded in the width direction.

[0022] In the present invention, in order to make the hollow box-shaped track bed movable by supporting it with two guide beams, the guide beams are gate-shaped with an open bottom surface, and the inside of the guide beams is opened. The vehicle is characterized in that it is movable and has a hanging arm that suspends an end in the width direction of the road bed.

[0023] In the present invention, in order to increase the buoyancy when used in a floating bridge, the connecting portion between the trackbed portion and the suspension arm also serves as a connecting portion of an auxiliary floating body, and the auxiliary floating body is It is characterized by being able to be attached and detached and folded.

[0024] In order to erect and remove the guide beam and the trackbed portion while occupying a small ground area, the present invention provides a support arm that can carry at least one section of the guide beam, hold it down, and move it in the longitudinal direction. , a means for cantilever-supporting a guide beam placed on the support arm, a drive means for sending out the guide beam placed on the support arm, a guide beam for one section can be placed on the support arm, and a track bed. a pushing arm that is movable in the running direction, and a drive means that can send out the pushing arm by a length of at least one section of the trackbed section; The invention is characterized in that it consists of an erection vehicle having:

[0025]

[Operation] During construction work, first, the guide beams are connected one after another, and their tips are extended in a cantilevered state until they reach the opposite bank.Next, they are supported on both banks, and then the guide beams are Two sets of beams are installed in parallel, and then the track bed parts supported by the two sets of guide beams and connected in sequence are sent out toward the opposite bank, and then, with the tip of the track bed part reaching the opposite bank, , the guide beam is lowered to allow the track bed to land.

[0026] Since there are two sets of guide beams, the guide beams can be made lightweight and can be extended by cantilever support. Therefore, it is possible to construct a long span overhead bridge. Furthermore, since the track bed is constructed while supporting the guide beams at both ends, the track bed can be safely constructed.

[0027] Furthermore, the track bed section can be constructed by making extensive use of the space between the two sets of guide beams, and the auxiliary floating body can be attached using the joints of the hanging arms that support the track bed section to the guide beams. Therefore, the track bed can be used both as an overhead fixed bridge and a floating bridge.

[0028] Since the guide beams and trackbed sections are sent out one section at a time,
If the length of this one section is short, the ground area occupied during erection and dismantling work can be reduced. Additionally, it can accommodate various river widths.

[0029]

Embodiment An embodiment of the present invention will be described below with reference to FIGS. 1 to 36. In this embodiment, the main members can be used both as an aerial fixed bridge and a floating bridge.

First, the overall structure of the bridge will be explained with reference to FIGS. 1 to 7.

FIGS. 1 to 4 show the overall structure when assembled into an overhead fixed bridge state, and FIGS. 5 to 7 show the overall structure when assembled into a floating bridge state.

In FIG. 1, a guide beam 50, an end guide beam 5
0' is first connected in an imaginary manner, and this is supported on the far bank 32 and the near bank 31 by extendable embankment cylinder devices 140, 140', and then hanging arms 69, 69 that can be attached to, detached from, and moved therefrom are attached.
', the bridge bodies 40, 40' are suspended and suspended.
The embankment seat cylinder devices 140, 140' are contracted to ground the lower surfaces of the end bridge bodies 40, 40' at both ends.

In FIG. 2, two guide beams 50, 50'
are arranged in parallel, and bridge bodies 40, 40' are arranged between them.

The bridge bodies 40, 40' are two box-shaped hollow bodies 40.
a, 40a, and are rotatably connected by a pin 41 at the lower center between them. This combined bridge body 40, 4
There are removable pins 42 and hanging arms 69, 6 on both sides of 0'.
Join 9'. Hanging arms 69, 69' are guide beams 50, 50
' and is movable in the longitudinal direction. The bridge bodies 40, 40' suspended from the hanging arms 69, 69' are also movable.

The vehicle 36 runs on the bridge bodies 40, 40'. Therefore, the upper surface of the bridge bodies 40, 40' becomes a track bed.

As described above, the bridge bodies 40, 40' are hollow bodies with a rectangular cross section having substantially the same width as the track bed width, and when used as a floating bridge, they can maximize the buoyancy within the spatial limitations. can be generated. Furthermore, when using it as a floating bridge, there is no need to suspend it in the air by the hanging arms 69, 69', so remove the hanging arms 69, 69' and use the detachable pins 42 to attach it as shown in the imaginary line. Auxiliary floating body 4
0a, 40b can be attached to increase the buoyancy as needed. The bridge body 40 is connected to the adjacent bridge body 40 or the end bridge body 40' in the longitudinal direction by lower connecting fittings 43, 44 and upper connecting fittings 45, 46. 4
Reference numeral 8 denotes a coupling fitting for maintaining the unfolded state.

The connecting fittings 43 and 44 and 45 and 46 are different in that they are female fittings and male fittings.

FIGS. 3 and 4 are rear views of the fixed overhead bridge when it is being transported on land, and FIG. 3 shows the bridge bodies 40 and 40' folded to reduce their width and loaded onto the platform of the transport vehicle 37. FIG. 4 shows the longitudinally separated guide beams 50, 50' attached to the transport vehicle 3.
7 is shown loaded on the loading platform.

FIG. 5 is a side view of the floating bridge, in which the bridge bodies 40 floating on the water surface 30 are connected, and the end bridge bodies 40' are connected at both ends via extendable bridge end lower connecting cylinders 49. The lower surface of the tip touches the far shore 32 and the near shore 31, and the upper surfaces thereof serve as the roadbed surface on which the vehicle 36 passes.

In FIG. 6, a bridge body 40 for a floating bridge consists of four hollow bodies 40a, 40a, 40b, and 40b. That is, two bridge bodies 40a, 40a and two auxiliary floating bodies 40b,
40b. The bridge bodies 40a, 40a are the same as those used as an overhead fixed bridge. The same detachable pin 42 is used in place of the hanging arms 69, 69' used in the case of an overhead fixed bridge.
, 42 to rotatably connect the auxiliary floating bodies 40b, 40b. Reference numeral 47 is a coupling fitting for maintaining the unfolded state on the water.

The vehicle 36 runs on the upper surface of the bridge bodies 40a, 40a. Connection with adjacent bridge bodies 40, 40' is the same as when used as an overhead fixed bridge.

When these bridge bodies 40, 40' are transported, they are folded into four to reduce their width as shown in FIG. 7, and then loaded onto a transport vehicle 37. When this is put on the water surface, it will be in the unfolded state as shown in Fig. 6 due to the relationship between the center of gravity and buoyancy.

[0043] Such a floating bridge is disclosed in Japanese Patent Application Laid-Open No. 1-210508.
The difference is that the auxiliary floating body is made removable and a suspension bridge for use as an overhead fixed bridge can be attached to the attachment point. be.

[0044] The structure of the end bridge body 40' is also different from that of the bridge body 40'.
The same is true for

Next, the means for constructing this bridge are shown in FIGS. 8 to 26.
This is explained by:

FIGS. 8 to 13 show detailed configurations of guide beams of an overhead fixed bridge. Of these, FIGS. 8 to 10 show connecting portions between guide beams.

The guide beams 50, 50' are arranged in the longitudinal direction (vehicle 36
It has a predetermined length in the running direction), and is provided with connecting fittings 51a and 51b at both ends. These connecting fittings 51a, 5
By connecting at 1b, it becomes one guide beam. 51
A is a male metal fitting that can be inserted into the female metal fitting 51b of the other guide beam 50, 50'. Both are connected with pins. The connecting fittings 51a and 51b are connected to four
It is installed at a point. When viewed from the top of each guide beam 50, 50', connecting fittings 51a, 51b are installed point-symmetrically at both ends.

The length of the guide beam 50 is substantially the same as the length of the bridge body 40. The length of the guide beam 50' is also approximately the same as the length of the bridge body 40'. (Embankment cylinder devices 140, 14
There are some differences depending on the installation of 0'. ) FIGS. 11 to 13 show suspension arm portions for suspending the bridge bodies 40, 40' from guide beams.

In FIGS. 10 to 13, the guide beams 50, 5
0' has a hollow portion 52 at the top, has a portal-shaped cross section, and is open at the bottom. The upper hollow part 52 is sealed by closing both ends of the profile with members (not shown). Therefore, the guide beams 50, 50' can float on water.

[0050] A rack 53 is attached to the inner walls of the left and right pieces along the longitudinal direction. Projecting pieces are provided vertically on the inner walls of the lower left and right pieces of the rack 53 to serve as guide rails 55 for a traveling body 60, which will be described later. Furthermore, the inner walls of the left and right pieces between the upper and lower protruding pieces also serve as guide rails.

60 is a running body for suspending the bridge bodies 40, 40', and includes four rollers 62, 62 in contact with the horizontal surface of the rail 55 and four rollers 63, 63 in contact with the vertical surface.
and a frame 61. Suspension bridge 69, 69'
is rotatably suspended from the lower end of the frame 61 by a pin 68.

The hanging arms 69, 69' differ only in length.

Note that the traveling body 60 does not have its own traveling drive means. As will be described later, when the bridge bodies 40, 40' are pushed, the bridge bodies 40, 40' move within the rail 55 in a suspended state.

Next, a configuration for making the guide beams 50, 50' project from the near shore 31 will be explained with reference to FIGS. 14 to 18.

A guide beam 50 is installed on the chassis 71 of the construction vehicle 70.
, 50' is installed. The delivery device 80 includes a guide device 82 installed on a support arm 81 that supports the guide beams 50, 50' and in contact with the rail 55, a drive device 85 installed on the support arm 81 and engaged with the rack 53, and a support It consists of a cylinder device 88 that rotates the arm 81 in the vertical direction. The support arm 81 is rotated vertically about a pin 89 by a cylinder device 88 .

The support arm 81 can enter inside the guide beams 50, 50'. The guide device 82 is located at the rear end of the support arm 81 (
They are installed at two locations on the far bank 32 side). Guide device 8
2 consists of a roller 83 that contacts the upper and lower surfaces of the rail 55, and a roller 84 that is installed near the roller 83 before and after the roller 83 and contacts the vertical surface. 83a is a mounting shaft for the roller 83.

The drive device 85 has two guide means 82, 82.
The support arm 81 is installed between the two. Drive device 85
consists of a pinion 87 that meshes with the rack 53, and a motor 86 that drives the pinion. 87a is a drive shaft of the pinion 87.

The two sets of guide devices 82, 82 are the guide beams 50,
This is for cantilever-supporting 50'. Moreover, the positions of these two sets of guide devices 82, 82 are such that the guide beams 50, 82 are attached in front of the guide beams 50, 50' that are extended in cantilever support.
0' is provided with a sufficiently large overhang at the rear of the construction vehicle 70 so that it can be placed on the support arm 81. Next, regarding the configuration of the bridge sending device 100 for installing the bridge bodies 40, 40' after installing the guide beams 50, 50',
This will be explained with reference to FIGS. 22 to 25.

The delivery device 100 is installed parallel to and below the delivery device 80. The delivery device 100 includes a pushing arm 105 that is horizontally supported by a plurality of guide devices 101 installed on the chassis 71, and a drive device 110 that moves the pushing arm 105 forward and backward.

The pushing arm 105 and the supporting arm 81 are connected to the chassis 71.
It is installed parallel to the direction of travel.

[0061] Both sides of the pushing arm 105 are channel-shaped, each serving as a rail. Rollers 103 and 104 of each guide device 101 are in contact with this rail. This allows the pushing arm 105 to move in the longitudinal direction. 102
is the mounting frame. A rack 1 is provided on the lower surface of the push arm 105.
07 are installed along the longitudinal direction. A drive device 110 is installed on the rear end side of the chassis 71. Drive device 1
10 consists of a pinion 113 that meshes with the rack 107 and a motor 112 that drives it.

The positions of the two sets of guide devices 101, 101 are as follows:
The pushing arm 105 is provided with a sufficiently large overhang at the rear of the construction vehicle 70 so that the longitudinal stroke of the pushing arm 105 can be made larger than the length of the bridge bodies 40, 40'. Further, the length of the pushing arm 105 is made longer than the sum of the stroke and the overlap between the supporting devices 101, 101.

The crane 120 for supplying the guide beams 50, 50' and bridge spans 40, 40' to the respective delivery devices 80, 100 will be explained.

The delivery devices 80 and 100 are installed at one end of the chassis 71 in the width direction. A crane 120 is installed at the other end.

The crane 120 includes a post 121 rotatably installed on the rear end side of the chassis 71, a main boom 124 installed on the upper end of the post 121 and rotated vertically by a cylinder device 123, and a main boom 124 on the upper end of the main boom 124. A top boom 126 is installed and rotated in the vertical direction by a cylinder device 125.

Next, construction work for an overhead fixed bridge will be explained.

First, the guide beams 50, 50' are erected. This will be explained with reference to FIGS. 14 to 21 and 28 to 30.

First, the construction vehicle 70 is stopped as shown in FIGS. 14 and 28.

Next, using the cylinder device 88, the support arm 8 is
Make sure that the rear end of 1 is slightly upward. Furthermore, the embankment cylinder device 140' is attached to the lower surface of the rear end side of the support arm 81 by an appropriate fixing means. The length of the embankment cylinder device 140' is adjusted to support the rear end of the support arm 81.

Next, the end guide beam 50' is placed on the support arm 81 using the crane 120. The crane 120 uses a hanging beam 131 and a hanging fitting 132 to lift the guide beams 50 and 50'.
can be hung. Hanging fittings (not shown) are provided on the upper surfaces of the guide beams 50, 50'.

The guide beam 50' is moved to the rear end side of the support arm 81, and the rail 55 is moved to the roller 83 of the guide device 82, 82,
84 to support it. In addition, the pinion 87 of the drive device 85
is engaged with the rack 53.

After that, the guide beam 5 is moved using the drive device 85.
Sends 0'. Once the tip of the guide beam 50' protrudes beyond the rear end of the support arm 81, the embankment cylinder device 140 is attached to the lower surface of the tip of the guide beam 50'.

As shown in FIGS. 19 to 21, at one end of the bracket 141 at the upper end of the cylinder device 140, 140' are connecting fittings 142a, 142b which can be connected to the connecting fittings 51a, 51b at the end of the guide beam 50'. Since we have set up
They are connected by pins 144. Further, the connecting fittings 143, 143 at the other end of the bracket 141 and the lower portions of the left and right pieces of the guide beam 50' are connected by a pin 145.

Next, when the guide beam 50' is advanced until the guide beam 50 can be placed on the support arm 81, the next guide beam 50 is placed on it as described above. Then, the guide beam 50' and the guide beam 50 are connected by pins at the connecting fittings 51a and 51b.

Hereinafter, the driving device 85 is driven to move the guide beam 50.
, 50'. Hereafter, the same operation is repeated.

In this way, the embankment cylinder device 1 at the tip
40 is extended until it reaches the far bank 32 (at this time, the guide beam 50' is connected to the near bank 31 side), the cylinder device 88, 140' is used to extend the tip (on the far bank 32 side). The embankment cylinder device 140 is placed on the ground.

Next, support arm 81 and embankment cylinder device 14
Remove the connection with 0'. In addition, crane 120 was used to
The side guide beam 50' is slightly lifted and only the chassis 71 is slowly moved forward. At this time, the crane 120 is operated so that the point at which the guide beam 50' is suspended by the crane 120 does not move. In this way, when the support arm 81 no longer exists above the bracket 141 of the embankment cylinder 140',
As described above, the guide beam 50' and the bracket 141 of the cylinder 140' are connected with the pins 144 and 146.

Next, using the embankment cylinders 140, 140', the height of the bridge bodies 40, 40' suspended from the guide beams 50, 50' via the suspension arms 69, 69' is adjusted so that they do not land on the ground. Adjust the brightness.

With the above steps, the construction of one guide beam is completed.

Next, the other guide beam for moving the construction vehicle 70 is constructed.

Next, the bridge bodies 40, 40' are constructed.

First, the bridge body 40 taken down from the transport vehicle 37 is expanded. As shown in FIGS. 26 and 27, a suspension beam 134 having a width larger than the width of the folded bridge body 40
If the suspension beam 134 is lifted with the four ropes 135 connected to the intermediate portions of the bridge bodies 40a, 40a, the bridge body 40 will be expanded.

The expanded bridge bodies 40, 40' are lifted up by the crane 120, and a pair of guide beams 50', 5 on the near shore 31 side are lifted up.
0'. Two traveling bodies 60 are inserted into each of the guide beams 50' and 50' in advance. Hanging arms 69, 69' of each traveling body 60 and bridge body 40,
40' are connected with pins 42. As a result, the bridge bodies 40, 40' are suspended from the guide beams.

Further, the pushing arm 105 of the delivery device 100 and the bridge bodies 40, 40' are connected by a link 115. push arm 10
5 and the link 115 are connected by a pin 116. Link 1
15 and bridge bodies 40, 40' are metal fittings 4 that connect the bridge bodies to each other.
3 and 44 are connected with a pin 117.

First, the tip bridge body 40' is arranged as described above, and the pushing arm 10 is moved using the drive device 110 of the delivery device 100.
5 is sent out, and the bridge body 40' is sent out.

When the bridge body 40' is sent out by a predetermined amount, the pin 11
7 and move the push arm 105 backward. Next, the next bridge body 4
0 as described above. Further, the bridge bodies 40 and 40' are connected using metal fittings 43 to 46. This connection means is similar to that of a floating bridge.

After completing the erection of the structures 40, 40' in this way, the embankment cylinder devices 140, 140 are retracted,
The bridge bodies 40', 40' are placed on the ground.

Next, the operation of the entire system will be explained with reference to FIGS. 28 to 33.

FIGS. 28 to 30 show the first half of the guide beam construction stage of the overhead fixed bridge construction.

FIG. 28 shows the far bank embankment cylinder device 140 attached to the first end guide beam 50' by the support arm 81 of the construction vehicle 70 located on the near bank 31 of the ground gap, as indicated by the arrow. As shown, the guide beam is unrolled one section and then the guide beam to be connected is about to be installed on the support arm 81 by the crane 120. The near shore embankment cylinder device 140' supports the lower surface of the tip of the support arm 81.

FIG. 29 shows the state in which all the guide beams 50 and the last end guide beam 50' are connected by repeating the above-described operations and are cantilevered in the air. Because there is a difference in height between the far bank and the near bank and deflection due to the guide beam's own weight, the support arm 81 is depressed in advance so that the lower surface of the far bank embankment cylinder device 140 is at a higher position than the ground on the far bank 32. Repeat the guide beam 50 at an angle. After all the feeding is finished, the support arm 81 is rotated as shown by the arrow, and the lower surface of the far shore embankment cylinder device 140 is moved to the far shore 3.
Ground it on the ground of 2. Since it is necessary to build bridges in areas where there is no other means of transportation to the far shore, all operations will be made possible from the nearby shore.

In FIG. 30, the end guide beam 5 of the near shore 31
The construction car 79 is detached from 0' and is supported on the ground by the near shore embankment cylinder device 140', and the construction of the guide beam is completed. Two guide beams are installed in parallel with a distance equivalent to the width of the structure.

FIGS. 31 to 33 show the latter half of the bridge body construction stage of the aerial fixed bridge construction.

FIG. 31 shows that the construction vehicle 70 lifts the first end bridge body 40' suspended from the guide beam by the suspension arms 69, 69'.
05, as shown by the arrow, and then the bridge body 40 to be joined is moved by the crane 120 to the guide beams 50, 50.
It shows where it is going to be hung between.

In FIG. 32, the bridge body 40 suspended from the guide beam by the suspension arm 69 is being connected by repeating the above-mentioned operation, and the pushing arm 10 is being moved in order to insert the bridge body 40.
5 is shown in the retracted state as shown by the arrow.

In FIG. 33, the bridge body 40, the end bridge body 40
The construction car 79 is shown leaving all the connections of ', and the weight of the guide beams 50, 50' and the bridge bodies 40, 40' is supported by the embankment cylinder devices 140, 140'. Thereafter, the embankment cylinder devices 140, 140' are contracted as indicated by the arrows, and the lower surfaces of the tips of the end bridge bodies 40', 40' are brought into contact with the ground on both banks, thereby completing the construction.

Next, regarding construction as a floating bridge, see FIGS.
This will be explained with reference to FIG. This is basically as known. In this case, the bridge bodies 40, 40' are bridge bodies 40a, 4
0a and auxiliary floating bodies 40b, 40b are combined.

In FIG. 34, the first bridge body 40 is moved by the crane 120 of the construction vehicle 70 located on the near bank 31 of the river.
, 40' are dropped onto the water surface 30. The bridge bodies 40, 40' are connected together while individually floating on the water surface 30. Therefore, unlike in the case of an overhead fixed bridge, the order of dropping does not necessarily have to follow the order of articulation. Other bridge bodies may be dropped at the same time and connected at the same time, or they may be dropped one by one and connected sequentially.

FIG. 35 shows the progress of the bridge bodies 40, 40' being connected by repeating the above-described operations. The angle of the end bridge body 40' is adjusted by being depressed by an extendable and retractable bridge end lower coupling cylinder 49 so that the lower surface of the tip is at a higher position than the ground on the far bank 32 or the near bank 31.

In FIG. 36, all the connections corresponding to the river width are completed, the construction vehicle 70 is moved away, the bridge end lower coupling cylinder 49 is contracted, and the end bridge body 40' is rotated as shown by the arrow. The lower surface of the tip is placed on the riverbank ground and the bridge connection is completed. In a floating bridge, unlike the case of an aerial fixed bridge, all the bridge bodies 40, 40' are supported by buoyancy, so there is no limit to the number of bridges that can be connected, and it is possible to construct it over an infinitely large river width. be.

[0101] In flowing water, the bridge bodies 40, 40' are held by a power boat (not shown) or a rope (not shown) to prevent them from being washed away.

According to this embodiment, since two sets of guide beams for constructing the bridge body are provided in parallel on both the left and right sides of the bridge body, the load per guide beam at the stage of constructing the guide beams is small; Since it can be made lightweight, it has the effect of allowing overhang cantilever support over a longer span without overturning the erected vehicle.

[0103] Furthermore, since the left and right sides of the bridge body are supported by guide beams, there is little risk of losing the balance and the bridge can be constructed safely.

Furthermore, since the space between the two guide beams can be increased and the auxiliary floating body can be attached to the attachment part of the hanging arm, there is an effect that a large buoyancy can be generated in the bridge body.

[0105] Furthermore, the guide beam has the effect of serving as a guardrail or a road width indicating band.

[0106] Furthermore, the upper surface of the guide beam also serves as a sidewalk, allowing people and vehicles to pass at the same time.

According to this embodiment, since the bridge body has buoyancy and can be supported aerially by the hanging arms and guide beams, it has the advantage that it can be used as both an aerial fixed bridge and a floating bridge.

According to this embodiment, the bridge body can be divided and connected in its longitudinal direction, and the width can be folded and expanded, and the guide beam can be divided and connected in its longitudinal direction, so that the external dimensions during land transport can be reduced. There is an effect that can be done.

[0109] Furthermore, the required length can be adjusted by the number of guide beams and bridge bodies.

According to this embodiment, the erection operation can be performed on the erection vehicle, and the divided bridge bodies and guide beams can be brought out one by one, so the ground area required for erection can be reduced. This has the effect of reducing the time and number of personnel required for erection.

[0111] In the above embodiment, a rack and pinion is used as a driving means for the feeding device 80 for the guide beam 50, but it is not necessary to use this rack and pinion. In this case, the push arm 105 of the delivery device 100 and the guide beam 50 are connected by a link (not shown) as a driving means for delivery.

[0112] The link 115 of the sending device 100 is connected to the bridge body 4.
0 and 40' may be coupled to the upper coupling fittings 45 and 46.

[0113]

[Effects of the Invention] According to the present invention, since the left and right sides of the trackbed are supported by two sets of guide beams, it is possible to install a long span overhead fixed bridge, and the trackbed can be safely erected.
Vehicles and people can pass over it safely and quickly.

[0114] Also, since it can be used for both fixed overhead bridges and floating bridges, it can be used for various topographical conditions that require emergency bridges,
For example, in a valley in a mountainous area, the river width span is relatively small, but the height of the riverbank from the valley floor is extremely large, or in a large river in a plain area, the river width span is extremely large and the water depth is large, but the river bank is extremely high. It can be applied in a wide range of geographical conditions, such as where the buoyancy of the river can be used and the height of the river bank above the water surface is small. In addition, since long-span overhead construction is possible, the range of application can be expanded.

[0115] Furthermore, since the external dimensions during land transport can be made smaller, the existing road network can be used to quickly arrive at the bridge site, and construction and removal can be carried out in a short period of time. It is possible to quickly restore traffic in the event of a disaster, and to move troops quickly and covertly in military situations.

[0116] Furthermore, since the ground area occupied by the construction work of the fixed overhead bridge can be reduced, the bridge can be constructed in narrow areas. In general, the back side of a bridge axis perpendicular to a river often has cliffs across the width of the road, which makes it easier to select the bridge site and makes it easier or unnecessary to prepare the ground for the bridge.

[Brief explanation of the drawing]

FIG. 1 is a side view of a mobile bridge in an overhead fixed bridge state according to an embodiment of the present invention.

FIG. 2 is a sectional view taken along line 2-2 in FIG. 1;

FIG. 3 is a rear view of the aerial fixed bridge in a transported state.

FIG. 4 is a rear view of the overhead fixed bridge in a transported state.

FIG. 5 is a side view of the maneuverable bridge in a floating bridge state.

FIG. 6 is a cross-sectional view taken along line 6-6 in FIG. 5;

FIG. 7 is a rear view of the bridge body of the floating bridge in a transported state.

FIG. 8 is a plan view of a guide beam according to an embodiment of the present invention.

FIG. 9 is a side view of FIG. 8;

FIG. 10 is a cross-sectional view taken along line 10-10 in FIG. 9;

FIG. 11 is an enlarged sectional view taken along arrow 11 in FIG. 2;

FIG. 12 is a view corresponding to FIG. 11 with a slightly different position from FIG. 11;

13 is a side view of the traveling body of FIG. 11. FIG.

FIG. 14 is a side view of an construction vehicle that is constructing a guide beam for an overhead fixed bridge.

FIG. 15 is a plan view of FIG. 14;

FIG. 16 is a diagram corresponding to the 16-16 cross section of FIG. 14;

FIG. 17 is a view corresponding to FIG. 16 with a slightly different position from FIG. 16;

FIG. 18 is a side view of the support arm of FIG. 16;

FIG. 19 is a longitudinal cross-sectional view of the supporting arm supported by the embankment cylinder device.

FIG. 20 is a longitudinal sectional view of the guide beam supported by the embankment cylinder device.

21 is a right side view of FIG. 20. FIG.

FIG. 22 is a side view of a construction vehicle that is constructing a bridge body of an overhead fixed bridge.

FIG. 23 is a plan view of FIG. 22;

FIG. 24 is a sectional view taken along line 24-24 of FIG. 22;

FIG. 25 is a view corresponding to FIG. 24 with a slightly different position from that of FIG. 24;

FIG. 26 is an explanatory diagram of the initial state of the bridge body expansion work of the overhead fixed bridge.

FIG. 27 is an explanatory diagram at the end of the work of expanding the bridge body of the overhead fixed bridge.

FIG. 28 is an explanatory diagram of the initial stage of construction work for guide beams of an overhead fixed bridge.

FIG. 29 is an explanatory diagram of a state in the middle of the construction work of a guide beam of an overhead fixed bridge.

FIG. 30 is an explanatory diagram at the end of the construction work of the guide beam of the overhead fixed bridge.

FIG. 31 is an explanatory diagram of the initial state of the bridge body construction work of the overhead fixed bridge.

FIG. 32 is an explanatory diagram illustrating a state in the middle of construction work of a bridge body of an overhead fixed bridge.

FIG. 33 is an explanatory diagram of the final state of the bridge body construction work of the overhead fixed bridge.

FIG. 34 is an explanatory diagram of the initial state of the floating bridge construction work.

FIG. 35 is an explanatory diagram of a state in the middle of construction work of a floating bridge.

FIG. 36 is an explanatory diagram at the end of the floating bridge construction work.

[Explanation of symbols]

40, 40'... Bridge body, 40a... Bridge body, 40b... Auxiliary floating body, 50, 50'... Guide beam, 53... Rack, 55... Rail, 69, 69'... Hanging arm, 70... Erection vehicle, 80... Guide Beam delivery device, 81... Guide beam support arm, 86... Motor, 1
00...Bridge body delivery device, 105...Bridge body pushing arm, 107
...Rack, 112...Motor, 120...Crane, 140
, 140'... Embankment cylinder device.

Claims (12)

[Claims] 1. A jack device that supports both ends of a guide beam connected to a plurality of guide beams that can be connected in the longitudinal direction, and an end in the width direction that is supported by the connected guide beams, a plurality of trackbed parts that can be connected in the longitudinal direction, two sets of the connected guide beams are located at both ends of the connected trackbed parts in the width direction, and the jacking device A maneuverable bridge comprising two sets of connected guide beams so as to support both ends of each set. 2. The mobile bridge according to claim 1, wherein the trackbed portion has a hollow box-shaped sealed structure. 3. The mobile bridge according to claim 2, wherein the roadbed portion is foldable in the width direction. 4. The mobile bridge according to claim 1, wherein the guide beam has a gate shape with an open lower surface, and the guide beam is movable inside the guide beam, and the widthwise end of the roadbed section is A mobile bridge characterized by having hanging arms for hanging. 5. The mobile bridge according to claim 5, wherein the connecting portion between the track bed portion and the hanging arm also serves as a connecting portion of an auxiliary floating body, and the auxiliary floating body can be attached to, detached from, and folded from the track bed portion. A mobile bridge featuring . 6. The movable bridge according to claim 6, wherein when both ends of the connected track bed section are landed, the jacking device holds the guide beam at a higher level than the track bed section. A mobile bridge featuring . 7. The mobile bridge according to claim 7, wherein the length of the guide beam for one joint and the length of the road bed for one joint are substantially the same. . 8. A support arm on which at least one section of a guide beam can be mounted and moved downwardly and in the longitudinal direction; means for cantilever-supporting the guide beam placed on the support arm; A mobile bridge comprising an erection vehicle having a drive means for sending out a guide beam mounted thereon. 9. The mobile bridge according to claim 8, further comprising a crane capable of loading one section of the guide beam onto the support arm. Claim 10: A pushing arm movably installed in the running direction;
A movable bridge comprising a construction vehicle, and a driving means capable of sending out the pushing arm by a length of at least one section of the track bed. 11. The movable bridge according to claim 10, further comprising a crane for suspending the road bed between the guide beams. [Claim 12] Guide beams are successively connected, their tips are extended in a cantilevered state until they reach the opposite bank, they are supported on both banks, and two sets of these guide beams are installed in parallel. The trackbed section is suspended by a guide beam and connected sequentially and sent out toward the opposite bank, and when the tip of the trackbed section reaches the opposite bank, the guide beam is lowered and the trackbed section is landed. How to construct a mobile bridge.