JPS63210304A - Method and apparatus for constructing bridge - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed description of the invention] [Purpose of the invention] (Industrial application field) The present invention relates to a bridge construction method and apparatus.

(Prior Art) For example, an overhang construction method is known as a construction method for constructing a bridge in a strait or a river without interfering with the navigation of ships on water.

Conventionally, this overhang construction method includes one in which construction is performed using a traveler crane a as shown in FIG. 8, and one in which construction is performed using a cable crane b as shown in FIG.

The overhang construction method using traveler crane a shown in Figure 8 above involves overhanging girder blocks sequentially from the abutments c and c or piers d and d, and then placing traveler cranes a and a on the overhanging existing girder e. This is a construction method in which the girder block f that has been installed and transported on the water by this crane is hoisted to the level of the existing girder e and connected to the existing girder e, as shown on the left side of FIG.

In addition, in the overhanging method using cable crane b shown in Figure 9, cable h is stretched between towers g1g, girder block f is transported by cable crane b suspended by this cable h, and girder block f is transported by the existing girder e. This is a construction method in which the girders are suspended at the end of the girder e and connected to the existing girder e.

(Problems to be Solved by the Invention) However, in any of the above-mentioned overhang construction methods, large-scale crane equipment is required, making the erection machine large-scale and difficult to operate. Since construction is carried out by suspending a huge girder block f, even if it is relatively easy to transport the girder block to the vicinity of the predetermined location, the girder block f is affected by weather conditions such as wind and cannot be moved to the existing girder. It is extremely difficult to move and connect to the correct position with respect to e, and there are many problems in terms of safety, economy, and workability.

Especially when using the traveler crane a shown in Figure 8,
Since the girder block f is suspended and then swung around, a large torsional force is generated on the existing girder e on which the crane is mounted, and it is therefore necessary to create a cross section that takes into account not only the load of the bridge after completion but also the torsion during erection. , it becomes extremely uneconomical. Also,
Traveler crane b has a large weight, so it has the disadvantage that the load at the time of erection becomes predominant. Furthermore, since the position where the girder block f is lifted is limited, there is a problem that it cannot be adopted depending on the terrain.

On the other hand, the construction method using the cable crane b shown in Figure 9 cannot be applied when the cable h cannot be stretched over the entire length of the bridge at the center of the bridge due to the nature of the cable crane, i.e. when the bridge is curved. This method requires huge concrete anchors i, i for securing the cable h and for fixing it when extending the cable h, and it has the disadvantage that it is extremely uneconomical considering that it must be removed after the construction is completed.

In view of this, the present invention was made with the aim of solving the problems of the prior art described above, and eliminates unnecessary construction parts without using large construction machines such as cranes, and without being influenced by weather conditions. To provide a method for constructing a bridge and an apparatus therefor, which can carry out overhang construction of girder blocks without any need.

[Structure of the invention]

(Means for Solving the Problems) In order to solve the problems of the prior art described above, the present invention provides a girder block to be connected to the tip of an existing girder fixed to a fixed part such as an abutment or a bridge pier. The girder block is conveyed over the existing girder to its tip, and the girder block is lowered along the tip surface of the existing girder and lowered to a predetermined position, and then the girder block is connected to the tip of the existing girder and the girder is sequentially moved. The first invention is a method for constructing a bridge, which is characterized by overhanging the bridge, and in order to carry out the above construction method, it is possible to fix it to the tip of an existing girder that is fixed to a fixed part such as an abutment or a bridge pier. a lift device main body, a lifter member supported by the lift device main body and movable up and down along the tip of an existing girder, a lifting drive means for moving the lifter member up and down with respect to the lift device main body, and an existing girder. and a girder block transfer means for transferring the girder block in the longitudinal direction thereof, the transfer means transfers the girder block to the tip of the existing girder, and transfers the girder block from the tip of the existing girder onto the lifter member. The second aspect of the invention is a bridge construction device characterized in that a lifter member is lowered to the level of an existing girder and connected to the existing girder.

(Function) In the above device, the girder block is placed on a trolley, transported over the existing girder to the tip of the existing girder, and the girder block is transferred from the trolley to the lifter member placed in the raised position. Afterwards, lower the lifter member to move the girder block to the level of the existing girder, connect it to the existing girder, then remove the lift device body from the existing girder and fix it again to the tip of the girder block that was connected first to become the existing girder. Then, the lifter member is raised again, and the next girder block is transported in the same manner as described above, so that the girder can be extended.

(Example) The present invention will be described below with reference to the example shown in FIGS. 1 to 7.

FIG. 1 shows an overall side view of an embodiment of a bridge construction device for carrying out the method of the present invention. In this embodiment, a lift device main body 1 is installed vertically along both sides of the tip of an existing girder 2. The lifter member 4 is cantilever-supported along the longitudinal beam member 3 of the lift device main body 1 so as to be able to rise and fall freely. The existing girder 2 is provided with a transfer means 6 for moving the girder block B in its longitudinal direction.

A structure 11 formed by members 7.8.9.10 is provided at the back of the longitudinal beam member 3 of the lift device main body 1, and the upper and lower surfaces of the structure 11 are connected to the upper and lower surfaces of the existing girder 2. Contacting rollers 12, 13 are provided, of which a cylinder 14 is used for all or part of one member 8, so as to be able to accommodate changes in the vertical height of the existing girder 2. In addition, a hydraulic jack 15 (details not shown) is provided at a suitable location on the longitudinal beam part shrine 3, and by operating this hydraulic cylinder 15, the lift device main body 1 can be fixed to the existing girder 2. ing.

In the first illustrated embodiment, the lifter member 4 is a horizontal member 16
Then, one rail member is provided in parallel on the upper surface of this horizontal member 16 by a position adjustment device 17 and a support 18, and the base ends of these horizontal members 16 and rail members 19 are connected, and the upper ends extend rearward to form an inverted shape. rollers 21 and 22 are attached to the rear end of the horizontal member 16 and the rear of the base 20, respectively, and these rollers 21 and 22 are in contact with the front and rear surfaces of the longitudinal beam member 3. The lifter member 4 is supported in a cantilever manner so as to be able to move up and down.

The position adjusting device 17 rotates the rotating member 23 that receives the rail member 19 and rotates about the rotation center 0 to align one rail member.

In the embodiment shown in the first drawing, the elevating drive means 5 is a one-screw type. The lower end of the threaded rod 26 is connected to the base 20 of the lifter member 4, and by rotating the female threaded member 25 manually or by a motor 27 such as electric or hydraulic, the threaded rod 26 is moved in the vertical direction. The lifter member 4 is moved up and down. In addition to the threaded rod 26, the elevating drive means 5 is also provided with a hydraulic cylinder, a winch,
It is also possible to use means such as hoisting and lowering using a chain block.

For example, a trolley 6A is used as the transport means 6. This trolley 6
is movable along the rail section 28 of the installed girder 2'', and in the illustrated embodiment, another girder block mounting cart 6B is mounted on this cart 6A-1-. It is considered a military structure. In other words, the rail 30 is mounted on the trolley 6AJ-.
A girder block mounting cart 6 is provided on this rail 30.
B's wheels 31.3] are engaged, and the rail 30 on the truck 6A and the rail 32 on the rail member 19 of the lifter member 4 are aligned in series.

Note that the girder block mounting trolley 6B is not equipped with wheels.
For example, a slippery material such as tetrafluoride resin (Teflon) may be used to slide it in, and the girder block mounting cart 6B may be omitted and the cart 6A itself may be carried onto the lifter member 4. You can also do it.

FIG. 5 shows a modification of the lift device main body 1, in which the longitudinal beam member 3 is supported in a direction perpendicular to the side of the existing girder 2.
L, a horizontal member 16 is provided horizontally protruding forward from the existing girder 2 on the −L side of this vertical beam member 3, and a bearing member 24 is supported on this horizontal member 16 via a position adjustment device 17. Threaded rods 26, 26.26 are vertically screwed into female threaded members 25. Rail members 19 are connected.

Although the details of the rail member 19 are not shown, it is rotatable at the connection part with the threaded rod 26, 26 on the negative side of the existing technique 2 in the longitudinal direction, and the connection part with the threaded rod 26 on the other side can be removed at any time. By doing this, one rail member can be turned and hung downward, and by doing so, for example, when moving the lift device main body 1 along the existing construction 2, it is possible to When an obstacle exists, it is convenient in that it is possible to avoid it and pass by turning one rail member downward.

As shown in FIG. 6, the position adjustment device 17 has the rotary member 23, which is received via a rotor 33, such as a ball, and is connected to a hydraulic jack, screw, etc. (not shown). The rail member 1 is rotated by means
It is possible to finely adjust the direction of the girder block B placed on the girder block 9 within the horizontal plane.

Further, in the case of the embodiment shown in FIG. 5, since the position adjustment is performed on the horizontal member 16, the rail member 19 supported by the threaded rod 26.degree. 26.26 is rotated and finely adjusted.

-12 The rotating member 2 for fine adjustment in the downward direction
Hydraulic jacks are arranged on each of the four sides at the bottom of the girder block B, and the inclination of the girder block B can be adjusted by selecting the operating points of these hydraulic jacks and raising one of the sides in the final stage. By doing so, the connecting end of the girder block B can be made to accurately face the distal end surface of the existing surgery 2.

Further, as the rotating member 23, as shown in FIG.
By disposing a suitable number of hydraulic jacks 34, the rotating member 23 can be rotated by the operation of the hydraulic jack 34.

In addition, the specific configuration of each part is not limited to the above-mentioned embodiments, and other design changes may be made.

Next, the operation of the basic embodiment shown in FIG. 1 will be explained with reference to FIG. 4.

The lift device main body 1 is installed as shown in the first figure at the tip of the existing structure 2, which has a girder fixed to an abutment or a bridge pier, and is fixed with a hydraulic cylinder 15. A cart 6A is installed on the girder block mounting cart 6B, and the girder block B is placed on the girder block mounting cart 6B, and the cart 6A is transported to the tip of the existing construction 2.

At this time, the lifter member 4 is raised so that the rail 32 on the rail member 19 is at the same level as the rail 30 on the trolley 6A as shown by the solid line in FIG. 1 (FIG. 4 (A)).
.

In this way, the trolley 6A is moved to the end of the existing surgery 2 and stopped, and after being made immobile by appropriate stoppers,
The girder block mounting cart 6B is attached to the rail member 1 of the lifter member 4.
9, the girder block B is transferred onto the lifter member 4 along with the girder block placement cart 6B as shown in the first figure (Fig. 4(B)).

Next, when the motor 27 of the elevating drive means 5 is driven to rotate the female screw member 25, the threaded rod 26 is lowered, and the lifter member 4 is lowered accordingly (FIG. 4(C)). When the lifter member 4 is lowered to the position shown by the chain line in FIG. If there is, it is corrected and the girder block B is aligned and connected to the existing construction 2 (Fig. 4(D)).

After completing the connection of the girder blocks B, release the fixation of the lift device main body 1, move the lift device main body 1 to the tip of the girder block B that has been connected as described above, and lift it again. Fix the device main body 1 (Fig. 4 (
E)). Next, the lifting drive means 5 is reversed to raise the lifter member 4, and the rail member 19 is again aligned with the upper surface of the truck 6A (FIG. 4(F)). Then, pull back the girder block mounting trolley 6B onto the trolley 6A, return the trolley 6A to the rear of the existing system 2 (Fig. 4 (G)), load a new girder block B onto the girder block mounting trolley 6B, and again. The girder block B is transported to the tip of the existing surgery 2 and transferred onto the lifter member 4 using the same procedure as described above, and connected to the existing surgery 2.

Thereafter, by repeating the same operation, the girder block B can be constructed to overhang the existing construction 2.

In the case of the embodiment shown in the fifth figure as well, the girder blocks B can be connected by the same procedure as in the case of the embodiment shown in the first figure.

〔Effect of the invention〕

As explained above, the bridge construction method according to the present invention involves transporting a girder block to be connected to the tip of an existing girder fixed to a fixed part such as an abutment or pier to the tip of the existing girder. The girder block was lowered to a predetermined position along the tip of the existing girder, and the girder block was connected to the tip of the existing girder with the knee, so there was no need to move the crane over the existing girder or cable as in the past. There is no need to use
The girder blocks can be connected using very small and light equipment. In addition, since there is no need to suspend the girder blocks, it is completely unaffected by weather conditions such as wind, greatly increasing safety, and eliminating the need for torsional forces and heavy loads to be applied to existing structures. Since there is no need to take special consideration to the folded surface, it is highly economical, and can be constructed not only for straight bridges but also for curved bridges, without being subject to any restrictions.

Furthermore, according to the erection device of the present invention, the girder blocks to be connected are supported by the lifter members based on the existing construction method.
The girder blocks can be brought to the connection position in an extremely stable state, and will not sway due to the influence of wind, etc. Therefore, there is no need for extra steps such as temporary fixing, and it is possible to drive rivets on site for connection. and welding work can also be significantly facilitated. In addition, since the lifter member can be raised and lowered freely, it is possible to move on to the next work process even more safely by suspending a work scaffold below the lifter member, resulting in a safer and more efficient construction with smaller construction equipment. It has the excellent effect of being able to perform overhang construction.

[Brief explanation of the drawing]

Fig. 1 shows an embodiment of the apparatus used to implement the bridge construction method according to the present invention, and is a side view showing the lifting and lowering relationship of the lifter member, Fig. 2 is an enlarged side view of the lifter member, and Fig. 3 is a plan view of the same half, Figures 4 (A) to (G) are explanatory diagrams showing the erection process, Figure 5 is a side view showing another embodiment of the lift device main body, and Figure 6 is a position adjustment device. FIG. 7 is a half plan view of the modified example, and FIGS. 8 and 9 are explanatory diagrams showing the prior art. DESCRIPTION OF SYMBOLS 1... Lift device main body, 2... Existing system, 3... Vertical beam member, 4... Lifter member, 5... Lifting drive means,
6... Transfer means, 6A... Trolley, 6B... Girder block mounting trolley, 11... 4M body, 12. 13...
Roller, 14... Cylinder, 15... Hydraulic cylinder, 16... Horizontal member, 17... Position adjustment device, 18
... Support, 19... Rail member, 20... Base,
21.22...Roller, 23...Rotating member, 24.
...Bearing member, 25...Female screw member, 26...Threaded rod, 27...Motor, 28...Rail part, 30°3
2... L/-le, 31... Wheel, B... Girder block. Applicant's agent: Sato - Yu@□s no Jyo W (no changes to the content) Figure 2 (A) (B) (D) (F) Figure 4 Figure 5 Figure 7 Ryo 8 Procedures Sanfu Sei Layer 1 (Method) % Formula % 1, Indication of the case 1988 Patent Application No. 42285 2, Name of the invention Bridge construction method and its device 3, Person making the amendment Relationship with the case Patent applicant 4 , Representative (postal code 100) 3-2-3 Marunouchi, Chiyoda-ku, Tokyo Telephone: Tokyo (211) 2321 Representative March 31, 1988 (Delivery date April 28, 1988) 6. Amendment Target drawing

Claims (1)

[Claims] 1. A girder block to be connected to the tip of an existing girder fixed to a fixed part such as an abutment or a bridge pier is conveyed to the tip of the existing girder, and the tip surface of the existing girder is conveyed to the tip of the existing girder. 1. A method for constructing a bridge, which comprises lowering girder blocks along the curve, lowering them to a predetermined position, connecting the girder blocks to the tips of existing girders, and sequentially overhanging the girders. 2. A lift device body that can be fixed to the tip of an existing girder that is fixed to a fixed part such as an abutment or pier, and a lift device that is supported by the lift device body and can be raised and lowered along the tip of the existing girder. A lifter member, an elevating drive means for moving the lifter member up and down with respect to the lift device main body, and a girder block transfer means for transferring the girder block in the longitudinal direction on the existing girder, and the girder block is moved by the transfer means. Construction of a bridge characterized by transferring the girder block to the tip of the existing girder, transferring the girder block from the tip of the existing girder onto the lifter member, lowering the lifter member to the level of the existing girder, and connecting it to the existing girder. Device. 3. The bridge construction apparatus according to claim 2, wherein the girder block transfer means is a truck that runs on an existing girder. 4. The bridge construction device according to claim 3, wherein the bogie is a double bogie.