JP2000045543A - Dismantling method of four-strut type vent - Google Patents

Abstract

PROBLEM TO BE SOLVED: To safely, efficiently and smoothly perform the high place working of the dismantling removal of a unit vent. SOLUTION: A carriage-cum-receiving beam 10 is interposed in the lower part of the four-strut type unit vent 1' of the highest top part, a rail receiving beam 7 is spanned on the upper part of the four-strut type unit vent of a lower order, jacked up with a jack so as to interpose an endless roller 8' between both, the four-strut type unit vent of the highest top part is laterally moved in the orthogonal direction to the longitudinal direction of a bridge up to a prescribed distance by a winch 17 and a wire 16 to form a free space, and hung down by a lifting machine such as a crane in the free space to be dismantled and removed. Next, the four-strut type unit vent 1 of a lower stage is hung down by the lifting machine in order to be dismantled and removed. At this time, a sandle integrally laminated to the four-strut type unit vent 1' of the highest top part is integrally sideward moved to hung down so as to be dismantled and removed.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The disclosed technology belongs to the technical field of dismantling and removing a four-post type vent that supports a heavy structure such as a bridge girder or a truss.

[0002]

2. Description of the Related Art As is well known, in the construction site of bridge construction and various steel structures, when a large and heavy structure such as a bridge girder or a truss is to be erected, a unit-sized bridge girder manufactured in advance in a factory is required. Truck structures, such as trusses, are transported by truck to the construction site, and are temporarily received by an assembling four-post type vent that was previously devised by the applicant. In this case, a joint mode is adopted in which the objects are joined together through a joint portion to be integrally joined. In this case, each of the folding four-post unit vents 1, 1 'assembled as shown in FIG. On the other hand, the level of the temporary receiving beam 2 for a structure (not shown) such as a bridge girder or a truss is made as flat as possible, and a predetermined space 4 is provided between the temporary supporting beam 2 and the support pipe 3 of the four-post type unit vent 1 'at the top.
H with a predetermined small size bolt hole to secure
The steel sandals 5 and the like are interposed by laminating a predetermined number of steps in a double-girder shape or the like. The interposition of the sandals 5 is performed by working at a high place. 1
At the time of dismantling and removal of ', a method is adopted in which the sandals 5 are manually pulled out and removed one by one by an operator to prevent the suspension wires of a lifting machine such as a crane from being extremely inclined.

[0003]

However, for example, when constructing a bridge or the like as a large structure,
The joining of the unit bridge girders is performed at a high place, and the number of layers of the sandals 5 to be stacked is different due to the conditions such as the design structure is different depending on the installation conditions of the bridge and the like. It is extremely dangerous due to work at high places, has the disadvantage of poor construction efficiency, has the disadvantage that construction work is extremely difficult, and has the disadvantage of high cost. there were.

[0004] In particular, when removing the sandal 5,
The removal and removal of the sandals 5 for each item requires extremely high skill, and in addition to working at heights, the inconvenience that the space 4 at the lower part of the temporary receiving beam 2 is narrow is difficult to work. there were.

[0005] Incidentally, the sandals 5 are connected to the temporary receiving beam 2 and the top 4.
When the sandals 5 are interposed between the support pipe 3 of the unit-type vent 1 'and the support pipes 3, the bolts are tightened through bolt holes and the like between the sandals 5 to maintain a stable posture. Yes.

Thus, even if the four-post type unit vent 1 'at the top is removed after the disassembly and removal of the sanddle 5, the lower four-post type unit vent 1' is then removed. In order to dismantle and remove the unit vent 1 'of the type, it is not always possible to maintain a sufficient space 4, and it is not possible to set a room such as a crane, so that the unit vent of the four-post type is dismantled. There is also a disadvantage that it is difficult to remove, and in addition, there is a disadvantage that the disassembly and removal of the lower four-post type unit vent 1 cannot be performed efficiently.

[0007]

It is an object of the present invention to provide a four-post type unit vent at the top and a temporary receiving beam at the lower part of a bridge girder when dismantling and removing a four-post type vent of an assembling type based on the prior art. The technical problem to be solved is to remove and dismantle the sandle interposed between and the lowermost four-post type unit vent at the lower part of the sandle. The four-post unit vent of the four-post type is laterally moved, and smoothly lifted and lowered using a lifting machine such as a crane in a free space with ample room on the side. A crane or other lifting machine is set using the extra space formed by the dismantling and removal of the above, and the next lower four-post type unit vent is sequentially lowered and lowered.
The dismantling and removal of the four-post vent can be performed safely and smoothly with high efficiency, and the diversion of each four-post unit vent can be performed as desired. It is intended to provide an excellent method of dismantling a four-post vent.

[0008]

Means for Solving the Problems A disassembly in which a multi-stage four-post type unit vent installed at a lower portion of an upper structure is sequentially removed from a top four-post type unit vent via a lifting machine. In the construction method, the four-post unit vent at the top of the four-post unit vent is fixed to the four-post unit vent at the bottom, together with the bogie and the receiving beam fixed in advance by bolts to the four-post unit vent at the top. Similarly, after moving laterally in the direction perpendicular to the longitudinal direction of the structure to a position not interfering with the above-mentioned structure along the rail support fixed via bolts, it is lowered and removed by a lifting machine such as a crane, Then, using a space formed between the structure and the four-post unit vent at the lower part, the four-post unit vent of the next stage is lifted down by a crane or other lifting machine in order and removed. To be With the backing as a backbone, the four-post type unit vent at the top and the carriage and receiving beam are moved by a winch and a wire, and the lateral movement between the top unit vent and the truck and receiving beam is moved by the rail. Side guides on both sides of the support beam so as not to deviate from the traveling direction. Also, when the carriage and support beam are laterally moved, an endless space is provided between the carriage and support beam and the rail support beam. In order to perform the lateral movement by interposing rollers, and to interpose the endless roller between the truck / receiver and the rail receiver, each fixing bolt is removed, and the truck / receiver is connected to the rail. A technical measure is taken such that the jack is slightly jacked up with respect to the receiving beam, and in addition, the lateral movement of the carriage and the receiving beam is performed in a direction perpendicular to the longitudinal direction of the structure.

[0009]

In the above construction, in order to construct a large and heavy structure such as a bridge bridge or a building truss, for example, a four-post system of each stage such as an assembled four-post vent is used. The small-sized H-shaped steel sandles are stacked in a predetermined number of rows between the four-post type unit vent at the top of the unit vent and the temporary receiving beam at the lower part of the structure. A four-post type unit vent at the top and a lower part of the structure, which is integrated by bolting the bolts through the bolt holes of each H-shaped steel of the sandal between the temporary receiving beam at the lower part of the structure and the pedestal of the unit vent at the top The level with the temporary receiving beam interposed between them is made as flat as possible, so that they can be stably interposed, and joints of large structures such as bridge girders and trusses are provided via the four-post type vent. Parts are joined and joined,
A predetermined erection work is performed, and the pedestal of the four-post type unit vent at the top is fixed to the trolley / supporting beam via bolts during the erection work, and the trolley / supporting beam is the topmost four post. At the top of the four-post type unit vent at the lower stage of the unit vent, it is integrally fixed to the rail support beam fixed with bolts, and at this time, no winch, jack or wire is arranged. When disassembling and removing each four-post type unit vent after the completion of the erection, the bolts for fixing the truck and the beam and the rail beam are removed so that the truck can be moved laterally, and the truck and the beam are removed. Using the fact that the endless roller mounting recess provided on the carriage / supporting beam is slightly smaller than the size of the endless roller, the jack is set up on the rail receiving beam, and a predetermined minute amount of jacking up is performed. An endless roller is interposed in the small gap, a winch and a wire are interposed between the bogie support and the rail support, and a predetermined amount is set to a position not interfering with the structure in a direction perpendicular to the longitudinal direction of the structure. Lateral movement, at this time, a roller type side guide for the side surface of the lower rail support is provided on the side of the trolley and receiver, and the trolley and receiver for the rail support for the lateral movement is provided. Prevent deviation in the direction of travel, ensure smooth lateral movement, and install overhanging scaffolds on the upper side of the lower four-unit unit vent to maintain construction safety, The trolley / support and the sandals are moved sideways as a unit, and a lifting machine such as a crane is used by utilizing the space formed between the lower four-column unit vent and the temporary support of the upper structure. Hang the sandals and the trolley / supporting beam using The body is removed, and the four-post type unit vent at the top is moved laterally together with the sandals in this way, and the space after being dismantled and removed by a crane or other lifting machine is used to sequentially lower the four pillars. Hanging down the unit vent with a crane etc. and dismantling and removing it, efficiently and shortening the construction period, so that all four-post unit vents can be dismantled and removed safely while working at heights, The construction period is shortened, and dismantling and removal can be performed at low cost. In this way, dismantling and removal as high-altitude work, which was conventionally performed inefficiently, can be safely performed on the ground. It is a thing that I chose.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, a preferred embodiment of the present invention will be described with reference to FIGS. 1 to 5 as an embodiment of the present invention.

The same parts as those in FIG. 6 will be described using the same reference numerals.

The illustrated embodiment is an embodiment of disassembly and removal of an assembling four-post vent used for temporary construction of a joint of a bridge girder of a bridge.

The assembled four-post type unit vents 1, 1 'are assembled in a predetermined manner from the ground at the construction site in the same manner as in the conventional embodiment shown in FIG. Sandals 5 are fixed by bolts 11 via pedestals 6 between the temporary receiving beams 2 of the object bridge girder, and the sandals 5 can be easily assembled and dismantled on the ground. It is like that.

The assembled four-post vent 1,1
'Is assembled in a predetermined manner in order from the ground at the construction site in the same manner as the conventional manner shown in FIG. 6, and a four-post unit vent 1' at the top and a temporary support of a bridge girder of a large structure. A small-sized H-shaped steel is provided between the temporary receiving beam 2 and the pedestal 6 in a conventional manner between the temporary receiving beam 2 and the pedestal 6. This is a mode in which the sandals 5 are interposed in a laminated state in a predetermined number of rows of girders through bolt holes through bolt holes, and the setting posture of the temporary receiving beam 2 is kept as horizontal as possible in a set state, and A lower working space 4 can be secured.

When assembling the top four-post unit vent 1 'on the top of the second four-post unit vent 1 from the top, the lower four-post unit vent 1' is assembled. A rail receiving beam 7 is attached to a vent 1 via a pedestal 6 and a bolt 11.
Sewn and fastened through (at this stage, jack 18
And sheaves 14, 14 ', wire 16, winch 17, etc. are not provided. Then, the carriage / receiver beam 10 is sewn and fixed onto the rail support beam 7 by the bolt 11 via the pedestal 6 and the bolt 11, and a four-post unit vent 1 ′ is provided on the upper part thereof. Sewing is fixed by bolts 11 via the base 6.

At the time of dismantling, the rail support 7 and the trolley and support 10 are used.
Remove the bolts 11 fixing the.

A bogie and receiving beam 10 which can be moved laterally with respect to the rail receiving beam 7 is provided on both sides in FIG.

【I】,

As shown in (b), a recess 9 is formed to interpose the endless roller 8 during disassembly.
8 is set so that it can be interposed at the time of dismantling, and the bogie / receiving beam 10 is dismantled via the jack 18 of FIG.

As shown in (a), since the recess 9 is smaller than the size of the endless roller 8, the jack 9 is jacked up so as to form a slight gap d.
In FIG.

[2] As shown in (b), it rolls in contact with the flange portion of the rail support 7 so that the bogie / support 10 does not deviate from the traveling direction when it moves laterally along the rail support 7. A guide roller 19 is provided on the outside so that the carriage / receiver beam 10 can move laterally smoothly along the traveling direction of the rail receiver beam 7.

An auxiliary support beam 7 'is provided at the end of the rail support beam 7 in the vertical direction, and a pulley type sheave 14 is provided at the center of the auxiliary support beam 7'. A hook at an end of the endless wire 16 is locked, and a middle part of the endless wire 16 is a bracket 15 of a vertical receiving beam 10 ′ provided to the carriage / receiving beam 10.
11, and the other end is provided at the rear sheave 14 'provided on a vertical receiving beam 10''provided at the other end of the rail receiving beam 10 as shown in FIG. Therefore, by operating the handle 17 'of the winch 17 as shown in FIGS. 3 and 4, the endless wire 16 is turned between the sheaves 14 and 14', and the carriage 7 Through the side guides 19, 19,
It is possible to smoothly move forward and backward and move laterally for a predetermined distance without deviating from the traveling direction.

Of course, as described above, the four-post type unit vent 1 'at the top is provided on the pedestal 6 on the trolley and receiving beam 10.
And the bolts 11 are integrally fixed in advance, so that the four-post type unit vent 1 ′ at the top is integrally formed along the rail support 7 at right angles to the longitudinal direction of the bridge 1. It can move laterally in the direction by a predetermined distance.

Thus, in this embodiment, the sandals 5 and 5 are integrally laminated on the temporary receiving beam 2 of the four-post type unit vent 1 'at the top via the bolt 11 in a cross-girder shape. The sandle 5 is integrally laterally moved together with the four-post type vent 1 'without being dismantled and removed manually by sliding as in the conventional mode.

At this time, a temporary receiving beam 2 for temporarily receiving the bridge girder is provided.
It is needless to say that the unit can be laterally moved while being integrally fixed to the unit vent 1 'of the topmost four-post type together with the sanddle 5 via the bolt 11.

In this case, as shown in FIGS. 2 and 4, the projecting scaffold 12 for venting and the working scaffold 12 'are moved via the brackets to the moving position of the bogie / receiving beam 10 of the rail receiving beam 7 via the bracket.
Is to be arranged.

When the four-post top unit vent 1 'is moved laterally, the bolt 11 that integrally connects the truck / receiver beam 10 and the rail beam receiver 7 is removed, and the jack 18 is moved as described above. And the winch 17 and the sheave 14 are set.
0 is slightly smaller in height than the dimension of the endless roller 8 because the mounting recess 9 of the endless roller 8 provided on the carriage and receiving beam 10 is jacked up by a slightly smaller height d.
Is inserted into the recess 9 of the trolley and support beam 10 so that the lateral movement of the rail support beam 7 of the four-post type unit vent 1 ′ on the trolley and support beam 10 can be performed smoothly and stably. To

In this case, since the jack 18 only needs to be jacked up by the small height of d, the inclination of the bogie / supporting beam 10 can be practically ignored.

Thus, as described above, the four-post type unit vent 1 'and the H-shaped steel sandle 5 on the top are integrally integrated with the predetermined amount of the structure in the longitudinal direction via the trolley and receiving beam 10. After moving to a position not interfering with a structure such as a bridge girder by laterally moving a predetermined distance in a right angle direction, in a free space 4 to be formed, the topmost four-post type unit is provided via a lifting machine such as a crane. The vent 1 ', the sandals 5, and the temporary receiving beams 2 may be suspended and dismantled and removed in a predetermined manner.

By doing so, the space 4 in which the four-post type unit vent 1 'at the top, which is initially assembled and set, is widened, and a hoist such as a crane is installed in the space 4. It can be set in a predetermined manner, the lower rail support beam 7 and the next-stage four-post unit vent 1 can be suspended from the ground in order, and can be dismantled and removed in a predetermined manner.

Various operations such as balling on the crane of the four-post top unit vent 1 'after the lateral lateral movement are performed via the vent overhanging scaffolding 12 or the working scaffolding 12'. Nevertheless, they can work safely.

Also, operations such as the operation of the handle 17 'of the winch 17 and the hooking operation of the hook to the sheave 14 can be performed safely by the vent overhanging scaffold 12 and the working scaffold 12'.

At the end of the lateral movement of the carriage / receiver beam 10 at a predetermined distance, a support 7 'provided at the end of the rail support beam 7 is provided with respect to the carriage / receiver beam 10. Functions as a stopper.

It should be noted that the embodiment of the invention of this application is not limited to the above-described embodiment, and that the design of the invention is not limited to the above-described embodiment. Providing a cushioning material such as rubber at the end of the beam 7 'can be appropriately adopted.

Of course, the present invention can be applied to the construction of a large steel structure such as a truss of a bridge girder of a bridge.

[0032]

As described above, according to the invention of this application, basically, the main support at the topmost portion 4 of the vent used for erection as a temporary receiving material for a large block-shaped structure such as a bridge girder of a bridge or a steel structure. The dismantling and removal of the unit vent is performed at the top 4
Narrow space between the top four-post unit vent and the top four-post vent, including the demolition and removal of sandals on the single-post unit vent There is no difficulty in the work because the wires of the lifting machine such as a crane touch the girder main body due to the narrowness, and the lower part of the four-post type unit vent at the top through the bogie / supporting beam. A free space is formed by a predetermined amount of lateral movement along the rail support beam in the direction perpendicular to the longitudinal direction of the structure, and it is suspended on the ground by a crane or other lifting machine in the free space. Since the dismantling is possible, there is an excellent effect that work at a high place is performed safely, smoothly, efficiently and with a shortened construction period.

In addition, since the truck and the beam can be moved laterally through the four-post unit vent at the top of the truck and the beam, the suspension and the like are performed in free space after the movement. An excellent effect is achieved in that the construction can be performed with high safety, high efficiency, high accuracy and high reliability.

[0034] In addition, the lateral movement of the bogie / receiver along the rail support can be performed by a winch and a wire interposed between the bogie / receiver and the rail support. This has an excellent effect that dismantling and removal are performed accurately.

In addition, since the carriage and the beam are moved using the roller type side guide with respect to the rail beam, there is no deviation of the carriage and the beam in the traveling direction, and the lateral movement is accurately performed. Excellent effects are achieved.

In addition, the carriage and receiver are slightly jacked up with respect to the rail support by a jack against lateral movement along the rail support of the carriage and receiver, and an endless roller or the like is interposed between them. By mounting the vehicle, smooth movement can be performed, and since the jack is slightly jacked up, the inclination of the bogie and the receiving beam does not occur, and an excellent effect that work can be performed safely and efficiently can be achieved.

Further, even if a sanddle is interposed between the top four-post type unit vent and the upper receiving beam, the sanddle and the topmost unit vent are fixed integrally by bolts. Since the sandal can be moved laterally, it is not necessary to perform an operation such as an individual unloading operation by a worker in a high place and a narrow portion in the conventional manner of the sanddle, and the ground can be lifted through a lifting machine such as a crane. Since it can be removed in a state where it is lowered, there is an effect that safety is high and work efficiency is good.

[Brief description of the drawings]

FIG. 1 is a plan view of the left half of the invention of this application.

FIG. 2 is a plan view of the right half.

FIG. 3 is a schematic side view of the left section.

FIG. 4 is a schematic side view of the right half.

FIG. 5

[A] is a schematic partial cross-sectional side view of the jack-up of the trolley and receiving beam,

[B] is a sectional view of the same.

FIG. 6 is a side view in which a unit vent, an upper receiving beam and a sandle interposed therebetween are arranged according to the prior art.

[Explanation of symbols]

 1, 1 '4 column type unit vent 7 Rail support 10 Carriage and support 4 Space 17 Winch 16 Endless wire 19 Roller type side guide 8 Endless roller 18 Jack d Jack-up gap 5 Sandle

 ──────────────────────────────────────────────────続 き Continued on the front page F term (reference) 2D059 AA05 GG41 2E177 AA03 BA06 CA01 CB01 CB04 CC12

Claims (5)

[Claims] 1. A disassembly method in which a multi-stage four-post type unit vent interposed and installed at a lower portion of an upper structure is suspended and removed from a four-post type unit vent in an upper stage through a lifting machine in order. A rail fixed horizontally to the upper part of the four-post type unit vent below the four-post type vent, together with the bogie / supporting beam having the four-post type vent at the top fixed in advance. After traversing along the receiving beam to a position where it does not interfere with the above structure, it is suspended by a hoist and removed.
Then, using a space formed between the structure and the lower four-post unit vent, the lower four-post unit vent of the next lower stage is sequentially lifted down by a crane and removed. A method of dismantling a four-post type vent that is characterized in that: 2. The four-post system according to claim 1, wherein the lateral movement of the top-end four-post unit vent and the carriage and receiving beam is performed by a winch and a wire. Dismantling method of vent. 3. A roller-type side guide for both sides of the rail support beam to prevent deviation from the traveling direction when the four-unit unit vent at the top and the carriage and support beam move laterally. The method for dismantling a unit vent according to claim 1, wherein 4. The trolley according to claim 1, wherein an endless roller is interposed between the trolley and the beam and the rail support during the lateral movement of the trolley and the beam. Dismantling method of this pillar type vent. 5. The method according to claim 5, wherein the endless roller is interposed between the trolley and the rail and the rail and the rail are slightly jacked up with respect to the rail and the rail. The method for dismantling a four-post type unit vent according to claim 4, characterized in that: