JP3904474B2 - Floor slab erection method and erection device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a construction method and a construction apparatus for installing a precast PC floor slab in a direction orthogonal to a bridge axis direction on left and right main girders provided in parallel with each other in the bridge axis direction.
[0002]
[Prior art]
Usually, when installing a bridge, first, two main girders parallel to each other are installed at a predetermined location, and a precast PC floor slab is placed on the two main girders constructed. It was.
[0003]
In this installation work, a precast PC floor slab is installed sequentially from one end side of the main girder mainly using a traveler crane (mobile hoist), and the floor already installed as the installation proceeds. A dedicated rail was placed on the plate, and a traveler crane was moved on the rail, and a precast PC floor slab was transported and installed.
[0004]
[Problems to be solved by the invention]
However, according to the above installation method, since the traveler crane moves on the installed precast PC slab, an iron mount is inserted between the main girder and the precast PC slab in terms of strength. It is necessary to provide a joining portion for joining with the girders. Therefore, there is a problem that the installation work becomes troublesome and the construction cost increases.
[0005]
Accordingly, an object of the present invention is to provide a floor slab erection method and a erection apparatus that can easily and inexpensively perform the work when the floor slab is erected on a main girder.
[0006]
[Means for Solving the Problems]
In order to solve the above-described problems, a floor slab erection method according to claim 1 of the present invention includes a left and right main girder provided in parallel to each other in the bridge axis direction, and a predetermined distance between the two main girders and in the bridge axis direction. This is a construction method in which a plurality of divided floor slabs that are divided at predetermined intervals in the bridge axis direction are sequentially installed on bridge girders that are arranged at intervals and are connected to auxiliary girders that connect both main girders. And
Support the divided floor slab and move it to a predetermined position on the bridge girder on the side of the elevating platform provided on the movable carriage movable in the direction of the bridge axis on the auxiliary girder between both main girders. The split floor slab is installed on the main girder.
[0007]
The slab erection method according to claim 2 is the erection method according to claim 1, wherein a divided slab in which the length in the width direction of the bridge girder is longer than the length in the direction of the bridge axis is provided on the main girder. At the time of installation, this divided floor slab is placed on a swivel provided so as to be able to swivel on the lifting platform so that its longitudinal direction coincides with the bridge axis direction, and the movable carriage is moved. In this method, the table is turned 90 degrees so that the longitudinal direction of the divided floor slab coincides with the width direction of the bridge girder.
[0008]
Further, the slab erection method according to claim 3 is supported on the lifting platform side when the predetermined divided slab is already installed on the main girder in the erection method according to claim 1 or 2. This is a method in which a newly installed divided floor slab is moved below a pre-existing divided floor slab by means of a lifting platform and moved below to a predetermined installation location.
[0009]
Furthermore, the floor slab erection device according to claim 4 of the present invention is arranged between the left and right main girders provided parallel to each other in the bridge axis direction, and between these both main girders and at predetermined intervals in the bridge axis direction. A bridge girder composed of an auxiliary girder that connects the two main girder, and sequentially installs a plurality of divided floor slabs divided at predetermined intervals in the bridge axis direction,
A moving carriage that has a length straddling at least three auxiliary girders and is movable on the auxiliary girders is provided with a hoisting table that supports the divided floor slabs.
[0010]
Further, the floor slab erection method according to claim 5 is such that the divided floor slab is placed on the lifting platform of the erection device according to claim 4 and can be swung at an angle of at least 90 degrees in a horizontal plane. A swivel is provided.
[0011]
Further, the floor slab erection device according to claim 6 is an existing installation in which the elevator floor in the erection device according to claim 4 or 5 is installed on the main girder with the divided floor slab supported on the elevator platform side. It is configured to be moved up and down between a passable height position capable of passing through the lower surface of the divided floor slab and a swivelable height position capable of turning above the existing divided floor slab.
[0012]
According to the construction method of the floor slab and the construction of the construction device, the divided floor slab is supported via a lifting platform on a movable carriage that is movable in the direction of the bridge axis on the auxiliary girder provided between the main girders. Since the split floor slab is installed on the main girder, for example, using only a traveler crane, the traveler on the split floor slab is compared to the case where the split floor slab is installed on the main girder in order from the end. Since the crane is not placed and, therefore, there is no need to insert a reinforcement base between the divided floor slab and the main girder, the construction work can be performed easily and inexpensively.
[0013]
Further, in addition to raising and lowering the divided floor slab, it can be swung at an angle of at least 90 degrees. Therefore, when the divided floor slab is moved by the movable carriage, the longitudinal direction of the divided floor slab is made to coincide with the moving direction. Thus, the divided floor slab can be moved in a stable state.
[0014]
Furthermore, by lowering the lifting platform and positioning the upper surface of the supporting divided floor slab below the lower surface of the existing divided floor slab, the existing divided floor is supported with the new divided floor slab supported on the movable carriage. Since the lower part of the plate can be passed, the split floor slab can be installed on the bridge girder from either end of the bridge girder, so that it is easy to secure the installation space for the loading device such as the traveler crane.
[0015]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, a floor slab erection method and a floor slab erection apparatus according to the present invention will be described with reference to FIGS.
[0016]
First, a floor slab (specifically, a precast PC floor slab) will be described. As shown in FIG. 1, a floor slab 1 according to the present invention includes left and right main girders 2 provided in parallel to each other in a bridge axis direction a, and between these two main girders 2 and at predetermined intervals in the bridge axis direction. It is placed on a bridge girder 4 which is composed of an auxiliary girder 3 (also called a horizontal girder) 3 which is arranged to connect the two main girder 2 and 2 together, and forms, for example, the floor of a road. From the above ease, the floor slab 1 is divided at predetermined intervals in the bridge axis direction a. Specifically, each of the divided floor slabs 1a is formed in a rectangular shape (strip shape) whose length in the width direction (direction orthogonal to the bridge axis direction a of the bridge girder 4) b is longer than that in the bridge axis direction a. ing. The main girder 2 and the auxiliary girder 3 are made of, for example, H-shaped steel.
[0017]
The erection device 5 according to the present invention is for sequentially placing the divided floor slab 1a on the main girder 2 and installing the floor slab 1 on the bridge girder 4.
As shown in FIGS. 2 to 5, this erection device 5 is roughly divided into a movable carriage 11 provided on the auxiliary girder 3 and movable in the bridge axis direction “a”. A lifting platform 13 provided so as to be movable up and down via the means 12, and a split floor slab 1a to be installed on the lifting platform 13 through the swiveling means 14 and to be installed thereon is mounted at least 90 degrees. A turntable 15 that turns at an angle and a width direction position adjusting means 16 that is provided on the moving carriage 11 and adjusts the position of the moving carriage 11 in the width direction b of the bridge girder 4 are configured.
[0018]
The moving carriage 11 includes a carriage main body 21 disposed on the auxiliary beam 3 and moving means 22 for moving the carriage main body 21 along the bridge axis direction a.
[0019]
The bogie body 21 is composed of left and right main beam members 23 made of H-shaped steel provided in parallel with each other in the bridge axis direction a, and the main beam members 23 connected in the width direction b of the bridge girder 4 in the vicinity of both ends. A plurality of auxiliary beam members 24 and a supporting beam member 25 provided in the width direction b in the vicinity of the center of the main beam member 23 and across the two main beam members 23. Has a length that straddles at least three auxiliary girders 3, and a sliding member (for example, steel) 26 that can slide on the auxiliary girders 3 is provided on the lower surfaces of both main beam members 23. It is provided along the bridge axis direction a. A guide member 27 (for example, polytetrafluoroethylene or the like is used) 27 is provided on the auxiliary girder 3 for smoothly guiding the sliding member 26.
[0020]
The moving means 22 uses the auxiliary girder 3 to move the carriage main body 21 between the two main girders 2 along the bridge axis direction a, and the driving principle thereof is a holding member that can hold the auxiliary girder 3. Is provided movably on the carriage main body 21, and the gripping member is moved relative to the carriage main body 21 in a state where the auxiliary girder 3 is gripped by the gripping member, whereby the carriage main body 21 is moved relative to the auxiliary girder 3. To move.
[0021]
The moving means 22 includes a sprocket and a chain, and these sprockets and chains are provided on both sides of each main girder 2, that is, at four locations, but since they are all the same mechanism, only at one location. Focus on the explanation.
[0022]
That is, the moving means 22 is a guide portion provided on the guide plate material 31 provided on the opposing surface of the upper and lower flange portions 23a of the main beam material 23 made of H-shaped steel and in the bridge axis direction a, and on the front and rear sides. The rod-shaped guide portion 34a is movable in a movable plate body 32 guided through the shaft 32a and movable in the bridge axis direction a, and a guide tube 33 provided in a vertical direction on a side surface which is also a surface of the movable plate body 32. And an engaging body (corresponding to the above-mentioned gripping member) 34 provided with a hook portion 34c having a recess 34b that can be engaged with and disengaged from the flange portion 3a of the auxiliary girder 3 at the lower end. Engaging / disengaging means 36 for engaging and disengaging the engaging body 34 with respect to the auxiliary girder 3 by raising and lowering through the projection 35 protruding from the guide portion 34a, and a bearing 37 at the front and rear positions of the main beam member 23, respectively. Time A drive-side sprocket 39 and a driven-side sprocket 40 attached to a freely provided rotating shaft body 38, one end portion is connected to one end side of the engagement body 34, and the other end portion connects the front and rear sprockets 39, 40. After being wound, the drive chain 41 connected to the other end side of the engagement body 34, that is, the endlessly connected to the engagement body 34, and the drive side sprocket 39 attached to the main beam member 23 side. It is comprised from the electric motor (rotation drive machine) 42 to rotate.
[0023]
Further, the engaging / disengaging means 36 is a lifting support member (moving direction) in which an elongated engaging groove 43a that can be movably engaged in the front-rear direction is formed on a protrusion 35 protruding from the engaging body 34 in the intermediate portion. 43, and the first elevating cylinder before and after the elevating support member 43 being moved up and down connected to the front and rear end portions of the elevating support member 43. 44 (for example, a hydraulic cylinder is used). The lifting support member 43 is not shown in FIG. 2 and is indicated by a virtual line in FIG.
[0024]
Therefore, as shown in FIGS. 6A to 6C, the electric motor 42 in a state where the engagement body 34 is lowered by the engagement / disengagement means 36 and the hook portion 34 c is engaged with the flange portion 3 a of the auxiliary girder 3. When the drive side sprocket 39 is rotated by this, the carriage main body 21 moves forward or backward via the drive chain 41. Of course, when the carriage main body 21 moves, the lifting support member 43 also moves, but the protrusion 35 protruding from the engagement body 34 is inserted into the engagement groove 43a formed in the front-rear direction. Therefore, there is no problem. When the carriage main body 21 advances to the position of the next auxiliary girder 3, as shown in FIG. 6 (d), the elevating support member 43 is raised by the first elevating cylinder 44, and the engaging body 34 is moved to the auxiliary girder. 3, the electric motor 42 is rotated in the reverse direction to move the engaging body 34 to the next auxiliary girder 3, and then the lifting support member 43 is lowered by the first lifting cylinder 44 to engage the engaging body. 34 is engaged with the next auxiliary beam 3.
[0025]
Then, as shown in FIG. 6E, by rotating the drive side sprocket 39 again, the carriage main body 21 moves forward by the same operation as described above. By repeating this operation procedure, the carriage main body 21 can be moved on the bridge girder 4.
[0026]
Further, the lifting platform 13 is formed in a rectangular shape in plan view, and is placed on the front and rear support beam members 25 and can be moved up and down by four guide bars 51 erected on the both support beam members 25 side. It is guided to.
[0027]
The elevating means 12 for elevating the elevating platform 13 is the same as the elevating chain 52 having a predetermined length disposed at the four corners of the elevating platform 13 and extending over the support beam 25 side and the elevating platform 13 side. It is comprised from the 2nd raising / lowering cylinder (it uses a hydraulic cylinder) 54 which raises / lowers the raising / lowering sprocket 53 which is standingly arranged in four places by the side of the support beam 25 and meshes in the middle of each raising / lowering chain 52. .
[0028]
Therefore, each lifting / lowering sprocket 53 can be lifted / lowered in synchronization by each second lifting / lowering cylinder 54, whereby the lifting / lowering platform 13 can be lifted / lowered at a predetermined height via the lifting / lowering chain 52.
[0029]
Then, the elevation height (amount of elevation) of the elevator 13 will be described. The lowermost position was set on the main girder 2 with the new divided floor slab 1a placed on the swivel 15. The height is such that it can pass under the existing divided floor slab 1a (can pass through), and the uppermost position is placed on the swivel 15 with the newly installed divided floor slab 1a. In such a state, it is set to a height (a swivelable height) at which the divided floor slab 1a can be turned above the existing divided floor slab 1a installed on the main girder 2.
[0030]
Further, the swivel base 15 is provided on a lower surface of the receiving beam member 62 and a pair of receiving beam members 62 on which the elongated rectangular divided floor slab 1a can be placed and connected to each other by a connecting member 61. It comprises a plurality of guide rollers 64 that can roll on a circular guide rail 63 provided on the elevator 13.
[0031]
Further, the turning means 14 for turning the turntable 15 includes a turning shaft body 72 which is inserted into a cylindrical bearing 71 provided on the lifting table 13 side and serves as a turning center, and a lower end portion of the turning shaft body 72. And a turning cylinder (a hydraulic cylinder is used) 74 that is attached to the elevator 13 and swings the turning lever 73.
[0032]
Therefore, when the turning lever 73 is swung by the turning cylinder 74, the turntable 15 is turned in an angle range of at least 90 degrees. That is, the longitudinal direction of the divided floor slab 1a placed on the swivel 15 can be changed from, for example, the bridge axis direction a to the width direction b.
[0033]
The width direction position adjusting means 16 is composed of a movement adjusting cylinder 81 that protrudes toward the main beam 2 at the front and rear positions of the left and right main beam members 23, and moves the rod portion 81a back and forth. Thus, the position of the carriage main body 21 between the two main girders 2, that is, the position in the width direction b is adjusted to be an appropriate position.
[0034]
Next, the construction method of the slab, that is, the construction work will be described.
In this description, the divided floor slab 1a is placed on the moving carriage 11 of the erection device 5 by a traveler crane arranged on one end side of the bridge girder 4, and in order from the other end side of the bridge girder 4 to one end side. Next, the case where the divided floor slab 1a is installed will be described.
[0035]
As shown in FIGS. 7 and 8, first, in a state where the carriage main body 21 is moved to the loading base side of the floor slab provided on one end side of the bridge girder 4, the divided floor slab 1 a is It is placed on the turntable 15 so that its longitudinal direction coincides with the bridge axis direction a. In addition, when the division | segmentation floor slab 1a cannot be directly mounted on the relationship of the magnitude | size of the traveler crane T so that the longitudinal direction may correspond to the bridge axis direction a, the longitudinal direction is the width direction b. Then, the swivel base 15 may be swiveled 90 degrees after being placed on the swivel base 15 so as to match. In addition, the elevation height position of the elevator platform 13 at this time does not need to be hidden under the existing divided floor slab 1a, so that it is set to a height above the main girder 2 from the beginning. Yes. Of course, when placing the divided floor slab 1a and moving the movable carriage 11, to raise the safety of workability, the elevator 13 is lowered (FIG. 7 shows the lowered state). . The position of the carriage body 21 in the width direction b is set to an appropriate position by the width direction position adjusting means 16.
[0036]
When the divided floor slab 1 a is placed on the swivel base 15, the carriage main body 21 is moved toward the other end side using the engagement body 34 and the moving means 22 provided on the carriage main body 21, and a predetermined level is obtained. Stop temporarily before the installation position.
[0037]
Next, as shown in FIG. 9, the swivel 15 is turned 90 degrees by the turning means 14 so that the longitudinal direction of the divided floor slab 1 a coincides with the width direction b of the bridge girder 4.
Next, as shown in FIG. 10, after the carriage main body 21 is moved to a predetermined installation position, the lifting platform 13 is lowered by the lifting means 12, and the divided floor slab 1a is placed on the two main girders 2. Installation is performed.
[0038]
After the installation of the divided floor slab 1a is completed, the carriage main body 21 is then returned to one end, and then the next divided floor slab 1a is placed on the carriage main body 21 by the traveler crane T, and the same procedure as above is performed. Next, the newly installed divided floor slab 1a is installed next to the existing divided floor slab 1a.
[0039]
By repeating this procedure, the floor slab 1 can be installed on the bridge girder 4 without moving the traveler crane T onto the divided floor slab 1a.
That is, compared to the conventional case where only the traveler crane is used and the divided floor slab is installed on the main girder in order from the end, the traveler crane is not placed on the divided floor slab, and therefore, the divided floor is not. Since there is no need to insert a reinforcing mount between the plate and the main beam, the installation work can be performed easily and inexpensively.
[0040]
In addition, the divided floor slab 1a can be mounted (supported) on the carriage body 21 and moved in a state where the longitudinal direction of the divided floor slab is turned 90 degrees so that the longitudinal direction thereof coincides with the moving direction. It can be performed in a stable state.
[0041]
Next, the case where the divided floor slab 1a is installed from the end opposite to the above will be described.
In this case, since the divided floor slab 1a is installed on the main girder 2 from the loading base side of the divided floor slab 1a, it is necessary to pass under the existing divided floor slab 1a installed on the main girder 2. is there.
[0042]
Specifically, this work will be described. On the swivel base 15 of the carriage main body 21 moved between the main girders 2 near the loading base, the divided floor slab 1a is moved by a traveler crane, and its longitudinal direction is in the bridge axis direction a. Place to match. Even when the divided floor slab 1a is installed from the loading base side, the space for loading the divided floor slab 1a on the carriage main body 21, that is, the portion where the divided floor slab 1a is not installed on the main girder 2 is the loading base. It is provided at the location closest to the side.
[0043]
Next, as shown in FIG. 11, the elevator 13 is lowered by the elevator 12 so that the upper surface of the new divided floor slab 1a placed on the swivel 15 is lower than the lower surface of the existing divided floor slab 1a. After that, the carriage main body 21 is moved by the moving means 22 to pass under the existing divided floor slab 1a, and after passing under the existing divided floor slab 1a, the carriage main body 21 is placed at a predetermined position. Stop.
[0044]
Next, the elevator 13 is raised to a position on the main girder 2 or the existing divided floor slab 1a, and then the swivel 15 is turned 90 degrees by the turning means 14 so that the longitudinal direction of the divided floor slab 1a is the bridge girder. 4 and coincides with the width direction b, and the elevator 13 is lowered to install the new divided floor slab 1a next to the existing divided floor slab 1a.
[0045]
In this way, by raising and lowering the elevator 13, the divided floor slab 1 a placed on the swivel 15 can be lowered to a position lower than the existing divided floor slab 1 a installed on the main girder 2. Therefore, even when the loading base of the divided floor slab 1a is provided at any end of the bridge girder 4, the construction work can be performed without any trouble. That is, the erection work can be facilitated.
[0046]
【The invention's effect】
As described above, according to the construction method of the floor slab and the construction device of the present invention, the auxiliary girder provided between the main girders is divided on the movable carriage made movable in the direction of the bridge axis via the lifting platform. Since the floor slab is supported and the split floor slab is installed on the main girder, as before, using only the traveler crane, the split floor slab is installed on the main girder in order from the end. Compared with, the traveler crane is not placed on the divided floor slab, and therefore there is no need to insert a reinforcing frame between the divided floor slab and the main girder. it can.
[0047]
Further, in addition to raising and lowering the divided floor slab, it can be swung at an angle of at least 90 degrees. Therefore, when the divided floor slab is moved by the movable carriage, the longitudinal direction of the divided floor slab is made to coincide with the moving direction. Thus, the divided floor slab can be moved in a stable state.
[0048]
Furthermore, by lowering the lifting platform and positioning the upper surface of the supporting divided floor slab below the lower surface of the existing divided floor slab, the existing divided floor is supported with the new divided floor slab supported on the movable carriage. Since the lower part of the plate can be passed, the split floor slab can be installed on the bridge girder from either end of the bridge girder, so that it is easy to secure the installation space for the loading device such as the traveler crane.
[Brief description of the drawings]
FIG. 1 is a schematic perspective view of a floor slab erection device according to an embodiment of the present invention.
FIG. 2 is a side view of the installation apparatus.
FIG. 3 is a plan view of the installation apparatus.
4 is a cross-sectional view taken along the line AA in FIG. 3;
FIG. 5 is a side view of the main part of the installation apparatus.
FIG. 6 is a schematic diagram for explaining a moving procedure of a moving carriage in the installation apparatus.
FIG. 7 is a schematic overall side view for explaining the erection method using the erection device.
FIG. 8 is a schematic side view for explaining a construction method using the construction apparatus.
FIG. 9 is a schematic side view for explaining a construction method using the construction apparatus.
FIG. 10 is a schematic side view for explaining the erection method by the erection device.
FIG. 11 is a schematic side view for explaining a construction method using the construction apparatus.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Floor slab 1a Divided floor slab 2 Main girder 3 Auxiliary girder 4 Bridge girder 5 Construction apparatus 11 Moving carriage 12 Elevating means 13 Elevating stage 14 Turning means 15 Turning table 21 Bogie main body 22 Moving means

Claims (6)

A bridge girder comprising left and right main girders provided in parallel to each other in the bridge axis direction and auxiliary girder arranged between the both main girders and at predetermined intervals in the bridge axis direction to connect the two main girders. A construction method in which a plurality of divided floor slabs divided at predetermined intervals in the axial direction are sequentially installed to lay the floor slabs,
Support the divided floor slab to the elevator platform provided on the movable carriage that can move in the direction of the bridge axis on the auxiliary beam between the two main girders, move it to a predetermined position on the bridge beam, and then lower the elevator platform The floor slab erection method is characterized in that the divided floor slab is installed on the main girder. When installing a split slab whose length in the width direction of the bridge girder is longer than the length in the bridge axis direction on the main girder, this split slab is moved up and down so that its longitudinal direction matches the bridge axis direction. After the movable carriage is moved by being placed on a turntable provided so as to be turnable on the table, the turntable is turned 90 degrees so that the longitudinal direction of the divided floor slab coincides with the width direction of the bridge girder. The construction method of a floor slab according to claim 1, wherein the floor slab is constructed. When a predetermined divided floor slab is already installed on the main girder, the new divided floor slab supported on the lifting platform side is positioned below the existing divided floor slab by the lifting platform. The construction method of a floor slab according to claim 1 or 2, wherein the floor slab is moved to a predetermined installation location through the lower part. A bridge girder comprising left and right main girders provided in parallel to each other in the bridge axis direction and auxiliary girder arranged between the both main girders and at predetermined intervals in the bridge axis direction to connect the two main girders. An apparatus for installing a floor slab by sequentially installing a plurality of divided floor slabs divided at predetermined intervals in the axial direction,
Construction of a floor slab characterized in that a lifting platform for supporting a divided floor slab is provided on a movable carriage having a length straddling at least three auxiliary girders and movable on the auxiliary girder. apparatus. 5. The floor slab erection device according to claim 4, wherein the elevator base is provided with a swivel base on which the divided floor slab is placed and which is turnable at an angle of at least 90 degrees in a horizontal plane. At the height position where the split floor slab supported on the lift base can pass through the lower surface of the existing split floor slab installed on the main girder, and above the existing split floor slab The floor slab erection device according to claim 4 or 5, wherein the floor slab erection device is configured to move up and down between a swivelable height position that can be swiveled.

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