JP2008050907A - Bridge girder member erecting construction method and bridge girder member erecting device used therefor - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To solve the problem of being unable to turn a jib crane, when a wide space is not secured, when an influence exerted on the strength of an erected bridge girder by a partial load is large, when there occurs offset loading due to an effect that a load of the bridge girder and a load of the jib crane itself are applied to the erected bridge girder, when turning the jib crane, in a cantilever erection construction method using the jib crane. <P>SOLUTION: The portal jib crane is used for an erection device, and the portal jib crane is inclined backward. A bridge girder member prepared in the rear of the portal jib crane is suspended by the portal jib crane, and the portal jib crane is inclined forward, and thereby, the bridge girder member is moved to the front of the erected bridge girder member by passing through the inside of the portal jib crane, and connected by being overhung to its front, and afterwards, the portal jib crane is returned backward by inclining backward. Then, the bridge girder member is suspended by the portal jib crane, and two or more of bridge girder members are successively connected and erected by repeating the forward movement, the overhanging and the connection of the suspended bridge girder member by a forward inclination of the portal jib crane. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a bridge girder erection method for linking and erection bridge girder, main girder, etc. (hereinafter referred to as “bridge girder member”) such as bridge piers and elevated roads, and a bridge girder member erection device used therefor. .

  One of the bridge girder construction methods is a cantilever construction method using a fully swiveling jib crane. It is possible to install an all-swivel type jib crane on a bridge girder that has been installed, lift the bridge girder prepared behind the jib crane with the jib crane, rotate the jib crane to move the bridge girder to the end of the bridge girder, and lower the bridge girder. It is a method of overhanging and connecting to the end of a built-up bridge girder.

  In the cantilever erection method using the jib crane, the load of the bridge girder and the load of the jib crane itself are applied to the installed bridge girder when the jib crane is turned. The effect on the strength of the installed bridge girder is considered to be large. There is also a problem that the jib crane cannot turn unless a large space is secured.

  In recent years, there has been a demand for a construction method that is light with minimal equipment and does not become an uneven load. In addition, it would be desirable in terms of improving work efficiency if it would be possible to systemize the installation equipment including loading of various bridge girder members including bridge girder and small transportation.

  The bridge girder erection method and the bridge girder erection device of the present invention have been developed with the aim of solving the above-mentioned problems, responding to the above-mentioned demands, and making further improvements.

  In the bridge girder member construction method of the present application, as described in claim 1, the bridge girder member is moved by the erection device on the bridge girder member that has been erected, and is extended and connected to the end of the bridge girder member that has been erected, and the movement and extension coupling In the construction method of the bridge girder member that connects and bridges two or more bridge girder members by repeating the above, a girder-type jib crane is used for the erection device, and the girder member prepared at the rear of the gate-type jib crane is tilted rearward. The bridge girder is lifted with a portal jib crane, and the bridge girder is lifted forward by tilting forward. After that, the portal type jib crane is tilted backward and returned to the rear, and then the bridge girder member is lifted by the portal type jib crane, and the portal type jib crane is tilted forward. Forward movement of the by lifting girder member, projecting, was sequentially coupled to bridging two or more bridge girder members repeat connection. In this case, as described in claim 2, the portal-type jib crane is mounted on a movable carriage that reciprocally moves over the installed bridge girder member, and the bridge girder member lifted by the portal-type jib crane is mounted on the movable carriage or bridge girder member. It is also possible to move the portal type jib crane and the bridge girder to the front of the installed bridge girder by placing the vehicle on the carriage that can reciprocate behind the movable carriage and moving the carriage or / and the carriage to the front.

  The bridge girder erection device of the present application includes a portal-type jib crane that can be tilted back and forth and can suspend the bridge-girder member, and a wire operating device that tilts the portal-type jib crane back and forth. The controller can extend and retract the front and rear wires of the portal-type jib crane in the opposite direction, and can extend the front wire and contract the rear wire to tilt the portal-type jib crane backwards. The rear wire is extended and the portal jib crane can be tilted forward so that it can be held at a predetermined tilt angle. In this case, as described in claim 4, the wire operating machine is either a wire jack, a jack with a clevis, or a chain block, and the wire jack is disposed below the portal type jib crane and in front of and behind the portal type jib crane. These wire jacks are equipped with a cylinder and a piston rod and a wire that can be pushed out and pulled back.Each wire jack has one end connected to a gate-type jib crane and the other end connected to the cylinder, and each wire is pushed out by a piston rod. If it is retracted, it pulls the portal jib crane, and when the piston rod is pulled back, it stretches to loosen the portal jib crane pull, and when the piston rod of the front wire jack and the piston rod of the rear wire jack are pushed out and pulled back together , Front and back Portal jib crane can be assumed to be held at a predetermined inclination angle as well as forward leaning or backward inclined pulling and opening of the wire over the jack is reversed. Further, as described in claim 5, the bridge girder member erection device is provided with a movable carriage and / or a carriage on the existing bridge girder so as to be able to reciprocate back and forth, and the carriage can be reciprocated behind the movable carriage. A portal-type jib crane and a wire operating machine are mounted on the movable carriage, and the movable carriage or / and the transport carriage can be mounted with a bridge girder member, other members, tools, and the like.

  In the bridge girder erection method according to claim 1 of the present application, the bridge girder member lifted by the gate-type jib crane is allowed to pass through the inside of the gate-type jib crane from the rear side of the gate-type jib crane by the rearward inclination and the forward inclination of the gate-type jib crane. Since it is moved to the front of the installed bridge girder member, it does not become an unevenly loaded state at the time of movement, and the influence on the strength of the installed bridge girder member is reduced. Moreover, since the portal-type jib crane does not turn, it can be installed without a large space.

  In the bridge girder erection method described in claim 2 of the present application, the bridge-type jib crane and the bridge girder member lifted by it are placed on the movable carriage, and the movable carriage is moved inside the portal-type jib crane and moved to the front of the existing bridge girder member. The bridge girder member can be easily moved. Moreover, the load burden at the time of bridge girder member movement concerning a portal type jib crane is reduced.

The bridge girder erection device described in claims 3 and 4 of the present application has the following effects.
(1) Since it is composed of a portal-type jib crane and a wire operating machine that tilts the portal-type jib crane back and forth, it becomes a simple bridge girder erection device.
(2) Since the wire operating machine can be either a wire jack, a clevis jack or a chain block, it is possible to select and use one that is easy to prepare and use according to the construction site.
(3) When a wire jack is used in the wire operating machine, the portal type jib crane can be tilted forward or backward by pushing and pulling back the piston rod of the wire jack. Becomes easier.

The bridge girder erection device described in claim 5 of the present application is provided with both or one of a movable carriage and a carriage that can reciprocate back and forth on a bridge girder member that has been installed, and a portal type jib crane and a wire operating machine are provided on the movable carriage. Since a bridge girder member, other members, tools, and the like can be mounted on the movable carriage and / or the transport carriage, the following effects are obtained.
(1) Bridge girder members, other members, tools, and the like are arranged and mounted on a cart to be systemized, and the loading and transportation of these devices and tools becomes easy, and the work efficiency is improved.
(2) By moving the moving carriage and the carriage separately, the gate-type jib crane and wire operating machine can be moved separately and other members and equipment can be moved separately to move or carry only the necessary ones. .

(Embodiment 1 of bridge girder construction method)
An embodiment of the bridge girder erection method of the present application will be described with reference to the drawings. The bridge girder member construction method shown is for the case where the bridge girder member 1 is a bridge girder. The bridge girder member 1 is lifted by the lifting tool 4 of the portal-type jib crane 3 installed on the bridge girder member 2 and moved to the front of the bridge girder member 2 already installed. This is a construction method in which two or more bridge girder members 1 are connected and erected by repeating the movement, extension and connection of the bridge girder member 2 which is extended in front of the erected bridge girder member 2 and connected thereto. In addition, A of FIG. 1 is an abutment.

  The portal type jib crane 3 to be used can be an existing one or an improved version thereof. 1 to 4, the portal jib crane 3 is mounted on a movable carriage 5 that can reciprocate on an installed bridge girder member 2. The portal jib crane 3 is tilted rearward and prepared behind the portal jib crane 3. The bridge girder member is lifted by the lifting tool 4 and then the portal-type jib crane 3 is erected to place the bridge girder member 1 on the movable carriage 5. Thereafter, the movable carriage 5 is moved to the front of the installed bridge girder member 2, is moved to the front through the inside of the portal jib crane 3, and is stopped near the tip of the installed bridge girder member 2. At the stop position, the portal-type jib crane 3 is tilted forward, the bridge girder member 1 on the movable carriage 5 is lifted by the lifting device 4 and is extended in front of the installed bridge girder member 2, and the bridge girder already installed with bolts / nuts or other connecting members. Connected to the tip of the member 2. When the connection is completed, the portal-type jib crane 3 is erected directly above, the movable carriage 5 is moved backward, the portal-type jib crane 3 is returned to the rear of the bridge girder member 2, and the portal-type jib crane 3 is tilted backward so that the lifting device 4 is passed back through the inside of the portal-type jib crane 3.

  Thereafter, as described above, the bridge girder member is lifted by the lifting tool 4, the gate-type jib crane 3 is raised, the bridge girder member 1 is mounted on the movable carriage 5, and the bridge girder member 1 is passed through the inside of the gate-type jib crane 3. By repeating the forward movement, the extension of the bridge girder member 1 and the connection thereof, two or more bridge girder members 1 are sequentially connected to the end of the bridge girder member 2 which has been installed, thereby completing the bridge girder.

  The rear-end inclination, standing up, and front-end inclination of the portal-type jib crane 3 are performed by a wire jack 6 mounted on the movable carriage 5. The wire jacks 6 are installed in front and rear of the portal jib crane 3 mounted on the movable carriage 5. The wires 7 of the rear wire jack 6 are loosened while extending the wires 7 of the front wire jack 6 to loosen the pull of the portal jib crane 3. When the portal-type jib crane 3 is pulled backwards, the portal-type jib crane 3 gradually tilts backward. On the contrary, when the wire 7 of the rear wire jack 6 is extended and the pull of the portal jib crane 3 is loosened, the wire 7 of the front wire jack 6 is pulled and the portal jib crane 3 is pulled forward, and the portal jib crane 3 is gradually moved forward. Inclined.

(Embodiment 2 of the bridge girder construction method)
The portal-type jib crane 3 and the wire jack 6 of the first embodiment are mounted on the movable carriage 5, but the bridge to be connected is short, and the movable range (stroke) of the portal-type jib crane 3 is large, moving. If a large number of bridge girder members can be connected and built at least, it is not always necessary to move the bridge girder with a movable carriage, and it can be fixed on a bridge girder that has already been installed.

(Embodiment of bridge girder member erection device)
One embodiment of the bridge girder erection device of this application is described based on a drawing. The bridge girder erection apparatus shown in these figures uses a wire jack 6 as a wire operating machine for operating the wire of the portal type jib crane 3. The bridge girder erection apparatus of FIG. 1 has a portal-type jib crane 3 and a wire jack 6 mounted on a movable carriage 5 that is installed on a bridge girder member 2 that has been installed so as to be able to reciprocate back and forth. A total of four wire jacks 6 are installed in front of and behind the portal jib crane 3 on both sides of the movable carriage 5 in the width direction.

  The movable carriage 5 is provided with a rotating wheel so that it can reciprocate on the bridge girder member 2 that has been erected by an electric motor or other power. The upper surface of the movable carriage 5 can be mounted with a portal-type jib crane 3, four wire jacks 6, and can be equipped with a bridge girder member, various other members, and connecting jigs and tools necessary for connecting the bridge girder member. It is.

  The portal type jib crane 3 can be an existing one or an improved version thereof. The portal-type jib crane 3 can be reciprocally inclined from the front to the rear, and a hanging tool 4 is suspended from the ceiling. The portal-type jib crane 3 is mounted at the center in the front-rear direction of the movable carriage 5.

  The wire jack 6 tilts the portal jib crane 3 back and forth, and includes a cylinder 8 and a piston rod 9 and a wire 7 that can be pushed out and pulled back as shown in FIG. A cylinder 8 and a piston rod 9, a movable pulley 10, a fixed pulley 11 and a guide pulley 12 rotatably attached to the tip of the piston rod 9 are accommodated in a case 13 shown in FIGS. The movable pulley 10 moves back and forth as the piston rod 9 is pushed and pulled back, and both the fixed pulley 11 and the guide pulley 12 are rotatably mounted in the case 13.

  6 (a) to 6 (c), one end of the wire 7 is connected to the portal-type jib crane 3, and the other end is hung on the outer periphery of the guide pulley 12, the fixed pulley 11, and the movable pulley 10, and the other end. Is fixed to the rotating shaft 14 (FIG. 5) of the fixed pulley 11. For this reason, when the wire 7 pushes out the piston rod 9 (to the left in FIG. 5), the wire 7 contracts and the pulling of the portal type jib crane 3 is strengthened, and the portal type jib crane 3 is moved from the upright position of FIG. 6 (a) to FIG. 6 (b). In contrast, when the piston rod 9 is pulled back (to the right side in FIG. 5), the pulling of the gate-type jib crane 3 is loosened, and the gate-type jib crane 3 is lifted from the upright position of FIG. 6 (a). It can be inclined forward as shown in FIG. Therefore, while pulling back the piston rod 9 of the front wire jack 6 and loosening the wire 7 to loosen the pull of the portal jib crane 3, the piston rod 9 of the rear wire jack 6 is pushed out and the wire 7 is pulled to move the portal jib crane 3 backward. When pulled, the portal jib crane 3 gradually tilts backward. On the contrary, the piston rod 9 of the rear wire jack 6 is pulled back and the wire 7 is loosened (extended), while the pulling of the portal jib crane 3 is loosened, the piston rod 9 of the front wire jack 6 is pushed out and the wire 7 is pulled. When the portal type jib crane 3 is pulled forward, the portal type jib crane 3 gradually tilts forward, and when the pushing or pulling back of the piston rod 9 of the front and rear wire jacks 6 is stopped, the portal type jib crane 3 is stopped and held in that position. It is.

  In addition to the wire jack, a clevis-equipped jack, a chain block, and other devices capable of operating the wire can be used for the wire operating machine of the present invention. When using a jack with a clevis, for example, as shown in FIG. 7, the jack 20 with a clevis is attached to a position near the lower end of each of the front wire and the rear wire of the gate-type jib crane 3, and the front wire and the rear wire are connected. Enable telescopic operation.

  The bridge girder member construction method and the erection device of the present invention can be used for construction of elevated equipment other than bridges and elevated roads, construction of steel frames of structures such as buildings, etc.

(A) is explanatory drawing of the state which lifts a bridge girder member in the bridge girder member erection method of this invention, and the bridge girder member is lifted up backward, and (b) shows the bridge girder member inside the portal jib crane. Explanatory drawing of the state which passes through, (c) is explanatory drawing of the state which makes a portal type jib crane incline forward, and lowers and projects a bridge girder member ahead of the bridge girder member which has been constructed. (A) is a side view of the state of Fig.1 (a), (b) is a front view of the state of Fig.1 (a). (A) is a side view of the state of FIG.1 (b), (b) is a front view of the state of FIG.1 (b). (A) is a side view of the state of FIG.1 (c), (b) is a front view of the state of FIG.1 (c). Side surface explanatory drawing of the wire jack of this invention. (A) is a side view of the bridge girder erection method of the present invention in a state where the portal jib crane is upright, (b) is a side view of the portal jib crane tilted backward, and (c) is a portal jib crane. The side view of the state made to incline forward. In the bridge girder construction method of this invention, the schematic at the time of using the jack with a clevis for a wire operating machine.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Bridge girder member 2 Built bridge girder member 3 Gate type jib crane 4 Lifting tool 5 Moving carriage 6 Wire jack 7 Wire 8 Cylinder 9 Piston rod 10 Moving pulley 11 Fixed pulley 12 Guide pulley 13 Case 14 Rotating shaft of fixed pulley 20 Jack with clevis

Claims (5)

  Bridge girder member construction method in which a bridge girder member is moved by a erection device on a bridge girder member that has already been installed, and is stretched and connected to the end of a bridge girder member that has already been installed, and two or more bridge girder members are connected and built by repeating the movement and extension connection. In the above construction, a portal-type jib crane is used as the erection device, the portal-type jib crane is tilted backward, the bridge girder member prepared behind the portal-type jib crane is lifted by the portal-type jib crane, and the portal-type jib crane is tilted forward. The suspended bridge girder member is passed through the inside of the portal-type jib crane, moved to the front of the installed bridge girder member, and extended and connected to the front, and then the portal-type jib crane is tilted backward and returned to the rear. The above-mentioned lifting of the bridge girder member by the type jib crane, the forward movement, extension and connection of the lifting bridge girder member by the forward inclination of the portal type jib crane are repeated. Bridge girder members erection method characterized by sequentially connecting bridging two or more bridge girder members and.   2. The bridge member erection method according to claim 1, wherein a portal-type jib crane is mounted on a movable carriage that reciprocally moves over an already-installed bridge girder member, and the bridge girder member lifted by the portal-type jib crane is mounted on the movable carriage or the bridge girder member. Is mounted on a carriage that can reciprocate in the rear of the movable carriage, and the gate-type jib crane and the bridge girder member are moved forward of the bridge girder member by moving the movable carriage and / or the carriage carriage forward. Bridge girder member construction method.   Equipped with a portal-type jib crane that can tilt forward and backward and can suspend bridge girder members, and a wire operating machine that tilts the portal-type jib crane back and forth, and the wire operating machine expands and contracts the front and rear wires in the reverse direction. It can be operated, the front wire can be extended and the rear wire can be contracted to tilt the portal jib crane backward, and conversely, the front wire can be contracted and the rear wire can be extended to tilt the portal jib crane forward A bridge girder erection device that can be held at a predetermined inclination angle.   4. The bridge girder erection device according to claim 3, wherein the wire operating device is either a wire jack, a clevis jack or a chain block, and the wire jack is located below the portal type jib crane and in front of and behind the portal type jib crane. These wire jacks are equipped with cylinders and piston rods and wires that can be pushed out and pulled back.Each wire jack has one end connected to the portal jib crane and the other end connected to the cylinder side, and each wire is connected to the piston rod. When it is pushed out, it retracts and pulls the portal jib crane, and when the piston rod is pulled back, it stretches and loosens the portal jib crane, and the piston rod of the front wire jack and the piston rod of the rear wire jack are pushed out and pulled back to each other. Then Bridge girder members erection device gantry jib crane pulling open of the wire of the wire jack is reversed is characterized in that it is held at a predetermined inclination angle as well as forward leaning or backward inclination of the post. In the bridge girder member erection device according to claim 3 or claim 4, a moving carriage or / and a transportation carriage is provided on the existing bridge girder so as to be able to reciprocate back and forth, and the transportation carriage can be reciprocated behind the movement carriage, A bridge girder erection device, characterized in that a portal-type jib crane and a wire operating machine are mounted on a movable carriage, and the movable carriage or / and the carriage can be loaded with a bridge girder member, other members, tools, and the like.

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