JP2014020157A - Erecting method of post - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an erecting method of a post by which work for joining the post can be performed easily.SOLUTION: A post 10 is lifted vertically in a lifting step, lowered while maintaining the vertical state in a lowering step, and joined to a lower structure 100 in this state. Thus, since the post 10 is brought into the vertical state in the lifting step and the lowering step and an axial direction of the post 10 is matched with an axial direction of an anchor bolt 101 in the lower structure 100, unnecessary interference between members in lifting the post 10 and in joining the post 10 can be prevented, and work for joining the post 10 can be performed smoothly.

Description

  The present invention relates to a column erecting method.

  Conventionally, in a construction site of a steel structure building, a pillar is lifted by a lifting machine such as a crane and then lowered at a predetermined position to be erected. Regarding such a column standing operation, Patent Document 1 discloses a method in which a wire rope or the like is wound around a column, and an annular portion at the end of the wire rope is hooked by a hoist of a lifting machine. Further, Patent Document 2 discloses an exposed elastic fixed column base method used when joining columns to a foundation, and Patent Document 3 discloses a joining structure when joining columns and columns. .

JP 2002-364177 A Japanese Patent Laid-Open No. 01-203522 Japanese Patent Laid-Open No. 06-180026

  By the way, when the method of lifting the pillar by hooking the hook to the annular portion of the rope as in Patent Document 1, the suspended pillar is inclined, so that the work cannot be smoothly performed when the pillar is erected. There are challenges. More specifically, when the exposed elastic fixed column base method of Patent Document 2 is adopted, the work of inserting the anchor bolt into the hole of the thick base plate cannot be performed smoothly. When it has a simple joining structure, there exists a subject that the operation | work which fits a junction part cannot be performed smoothly.

  The present invention has been made to solve such problems, and an object thereof is to provide a column erecting method capable of smoothly performing column joining operations.

  The column erecting method according to the present invention includes a mounting step of attaching a pair of hooking members to a position above the center of gravity in the height direction on two opposite sides of a column made of a square steel pipe, and the hooking member In addition, a hooking process in which a hook of a hanging tool suspended from the lifting machine is hooked, a lifting process in which the hook of the lifting tool is lifted using a lifting machine, and the column is lifted vertically, and the column is maintained in a vertical state. And a lowering step of lowering the column to a predetermined position, and a bonding step of bonding the lower end of the column to the lower structure located below the column.

  According to the column erecting method according to the present invention, the column is lifted vertically in the lifting step, is lowered while maintaining the vertical state in the lowering step, and is joined to the lower structure in this state. In this way, the column is in the vertical state in the lifting process and the descent process, and the axial direction of the column and the axial direction of the joint portion of the lower structure coincide with each other. It becomes possible to prevent unnecessary interference between members at the time of joining, and the joining work of columns can be performed smoothly.

  Further, in the mounting step of the column erecting method according to the present invention, the hooking member is inserted into the two opposite side portions of the column using bolts inserted through the holes formed in the two opposite side portions. It is preferable to detachably attach to the side part. In this way, the hooking member for hooking the hook is detachably attached to the pillar, so that when the hooking member is unnecessary, the hooking member is removed from the pillar, so that the situation where the worker etc. is hooked on the hooking member does not occur, Work safety can be maintained. Also, when loading the pillar on the truck bed or temporarily placing it on the construction site, it is possible to remove the hook member to improve the packing and to efficiently load or temporarily place it. It becomes.

  Further, in the column erecting method according to the present invention, the hooking member includes an abutting piece having an abutting surface having an insertion hole through which a bolt is inserted and abutting against a side portion of the pillar, and the abutting piece. An extension piece that extends in the opposite direction to the abutment surface and has a hooking hole to be hooked by the hook, and extends from the abutment piece in the opposite direction to the extension piece and is locked to the other side of the column. It is preferable to have a locking piece that restrains rotation about the bolt of the contact piece in the state where the column is lifted. In this case, a bolt is inserted into the insertion hole of the contact piece and the hole of the column, the hook member is attached to the column by the bolt, and the rotation of the contact piece is restricted by the locking piece. Therefore, in the lifting process and the descent process, the hook member can be prevented from rotating and the posture of the column can be stabilized, so that the efficiency of the column standing work can be improved.

  Further, in the column erecting method according to the present invention, the hook is configured to be able to release the hooked state of the hook on the hooking member by operating the pulling string, and is hooked by the operation of the pulling string. It is preferable to have a release process for releasing the process after the joining process. In this way, having a release process that releases the hooked state by operating the drawstring, the hook can be easily removed by simply operating the drawstring without using a stepladder, etc. Efficiency can be further improved.

  According to the present invention, the column joining operation can be performed smoothly.

It is the side view which showed the pillar and hook member to which the standing method of the pillar which concerns on 1st embodiment of this invention was applied. It is a perspective view which shows the hook member in FIG. It is a top view which shows the state which attached the hook member to the pillar in the standing installation method of the pillar which concerns on 1st embodiment of this invention. It is a perspective view which shows the state which hooked on the hook member attached to the pillar in the standing installation method of the pillar which concerns on 1st embodiment of this invention. It is a side view which shows the state which lifts a pillar upwards in the standing installation method of the pillar which concerns on 1st embodiment of this invention. It is a side view showing the state where a pillar is dropped below in the pillar standing method concerning a first embodiment of the present invention. It is a side view which shows the state which joins a pillar to a lower structure in the standing-up method of the pillar which concerns on 1st embodiment of this invention. It is a perspective view which shows the lower pillar which joins an upper pillar in the standing-up method of the pillar which concerns on 2nd embodiment of this invention. It is a perspective view which shows the state which attached the clipper to the column coupler of a lower pillar in the standing installation method of the pillar which concerns on 2nd embodiment of this invention. It is a perspective view which shows the state which descend | falls an upper pillar downward in the standing-up method of the pillar which concerns on 2nd embodiment of this invention. It is a perspective view which shows the state which joins an upper pillar to a lower pillar in the standing-up method of the pillar which concerns on 2nd embodiment of this invention.

  Hereinafter, a preferred embodiment of a column erecting method according to the present invention will be described in detail with reference to the drawings.

[First embodiment]
With reference to FIGS. 1-7, the standing method of the pillar which concerns on 1st embodiment of this invention is demonstrated. The lower structure in the present embodiment is a reinforced concrete foundation. FIG. 1 is a side view showing a column and a hook member to which the column erecting method according to the first embodiment of the present invention is applied. FIG. 2 is a perspective view showing a hook member. FIG. 3 is a plan view showing a state in which the hook member is attached to the column. FIG. 4 is a perspective view showing a state in which a hook is hooked on a hooking member attached to a pillar. FIG. 5 is a side view showing a state in which the column is lifted upward. FIG. 6 is a side view showing a state where the pillar is lowered downward. FIG. 7 is a side view showing a state in which the pillar is joined to the lower structure.

  As shown in FIG. 1, the column 10 is a structural member constituting a framework of a ramen structure, and is formed of a square steel pipe having a substantially square cross section.

  A position biased upward from an intermediate position in the height direction on the two opposite side portions 11 of the column 10 (that is, a position higher than the gravity center position in the height direction) and a center position in the width direction (that is, the gravity center position in the width direction). ) Has a hole 11a through which the bolt 30 is inserted. A base plate 12 is welded to the lower end of the column 10 and has a square plate shape with an insertion hole 12a for inserting an anchor bolt. A hooking member 20 is detachably attached to each of two opposing side portions 11 of the column 10.

  As shown in FIG. 2, the hooking member 20 includes a rectangular flat plate-like contact piece 21, a rectangular flat plate-like extending piece 22 bent at a right angle from the upper side of the contact piece 21, and the contact piece 21 side. A rectangular flat-plate-shaped locking piece 23 bent at a right angle in the opposite direction to the extending piece 22 from the side is provided.

  The width of the contact piece 21 is substantially the same as the width of the column 10, and the surface on the side of the locking piece 23 becomes the contact surface 21 b that contacts the outer surface of the side portion 11 of the column 10. An insertion hole 21 a for inserting the bolt 30 is provided at a substantially central portion in the width direction of the contact piece 21.

  The extending piece 22 has a hooking hole 22a for hooking a hook 41, which will be described later, in the center in the width direction.

  The surface on the contact piece 21 side of the side portion locking piece 23 is a side portion (side portion adjacent to the side portion 11) 11 ′ other than the two side portions 11 among the four side portions of the column 10 (FIG. 3). The contact surface 23a is in contact with the outer surface of the reference).

  As shown in FIG. 4, a hanging tool 40 is attached to the hooking member 20 configured as described above. The hanging tool 40 includes a wire 43, hooks 41 connected to the respective ends of the wire 43, and a pulling string 42 provided so as to hang downward from each hook 41.

  The hook 41 has an engaging portion 41 a for engaging with the hooking hole 22 a of the extending piece 22. The engaging portion 41a has a hook shape and is formed so that the tip protrudes upward. The engaging portion 41a engages with the hooking hole 22a. For example, the tip of the engaging portion 41a is the protruding portion of the hook 41 main body. The hook 41 is hooked on the hooking member 20 by contacting with the hook member 20.

  One end of the drawstring 42 is attached to the lower end portion of the hook 41, the other end is hung downward, and the length thereof is a work on the ground or a work floor surface in a state where the column 10 is joined to the lower structure 100. It is set so that it can be reached by a person.

  In the hanger 40 having the above-described configuration, when the pulling string 42 is pulled downward, the tip of the engaging portion 41a is pulled down to be separated from the protruding portion of the main body of the hook 41, and the engaging portion 41a is engaged with the hooking hole 22a. The match is released. Furthermore, the hooking state on the hooking member 20 is released by pulling the pulling string 42 in the direction of moving the hook 41 away from the hooking member 20 while maintaining this state.

  Next, each step of the column erecting method according to the first embodiment will be described. First, the attaching process of the hooking member 20 is performed. For example, the mounting process is performed on the pillar 10 in a state where it is carried into a construction site by a truck or the like and laid on a truck bed or a temporary storage place. In the attaching step, the pair of hooking members 20 are attached to the two side portions 11 of the column 10 facing each other and above the center of gravity in the height direction.

  Specifically, as shown in FIG. 3, in each of the two side portions 11 of the column 10, the contact surface 21 b of the contact piece 21 of the hooking member 20 is in contact with the outer surface of the side portion 11, The contact surface 23a of the locking piece 23 is in contact with the outer surface of one side portion 11 ′ adjacent to the side portion 11, and the positions of the insertion hole 21a and the hole portion 11a are further aligned. In this state, the bolt 30 is inserted into the one insertion hole 21a, and the nut 31 is screwed to the tip of the bolt 30 protruding from the other insertion hole 21a, whereby the right hook member 20 is attached to the column 10. It is done.

  Next, as shown in FIG. 4, a hooking process for hooking the hook 41 of the hanger 40 suspended from the lifting machine is performed on the hooking member 20. In the hooking step, the two hooks 41 provided at both ends of the wire 43 are hooked to the hooking member 20 by engaging the engaging portions 41a with the hooking holes 22a of the hooking member 20.

  Next, a lifting process for lifting the pillar 10 vertically is performed. In the lifting process, first, an intermediate portion of the wire 43 is hooked on a hook 50 of a lifting machine such as a crane. Then, the hook 50 is pulled up by the operation of the lifting machine, and the lying pillar 10 is erected while the base plate 12 is grounded. At this time, if the rotation of the hooking member 20 is not constrained, depending on the direction of the column 10, the hooking member may rotate with the position of the hole 21 a as the axis of rotation. Since 23a is in contact with the outer surface of the side portion 11 ', rotation is prevented.

  As shown in FIG. 5, the pillar 10 is lifted and lifted by further lifting the hoist 50 of the hoist, and the hook 41 of the hoist 40 is positioned in the height direction of the pillar 10 at this time. Since the center of gravity is higher than the center of gravity and coincides with the center of gravity of the column 10 in the width direction, the column 10 is maintained in a vertical state. In the lifting process, the drawstring 42 is in a state of hanging downward.

  Next, a lowering step is performed for lowering the column 10 to a predetermined position while maintaining the vertical state. In the descent process, as shown in FIG. 6, the anchor bolt 101 of the foundation (lower structure) 100 in which the through hole 12 a penetrating vertically in the base plate 12 is positioned below the column 10 is maintained in the vertical state. The lifting machine is operated so as to be located at the upper part, and the hook 50 is lowered in this state, whereby the pillar 10 is lowered to the foundation 100.

  Next, a joining process for joining the lower end of the pillar 10 to the anchor bolt 101 of the foundation 100 located below the pillar 10 is performed. In the joining step, as shown in FIG. 7, the anchor bolt 101 is inserted into the through hole 12 a while the pillar 10 is maintained in the vertical state, and the nut 102 is screwed into the anchor bolt, so that the pillar 10 is Bonded to the foundation 100.

  Next, the cancellation | release process which cancels | releases a hook state by operation of the drawstring 42 is performed. In the releasing step, the pulling string 42 is pulled by an operator working on the ground, so that the hook 41 is released from the hooking member 20 and the hanging tool 40 is removed from the hooking member 20. Note that the hooking member 20 is removed from the column 10 after the releasing step. As many hook members 20 as the number of pillars 10 to be erected are prepared, and after the steps from attaching the hook members 20 to releasing the hook state are completed for all the pillars 10, the hook members 20 are removed collectively. It is preferable in terms of work efficiency.

  The operation and effect of the column erecting method according to the first embodiment of the present invention will be described.

  According to the column erecting method according to the present embodiment, the column 10 is lifted vertically in the lifting step, is lowered while maintaining the vertical state in the lowering step, and is joined to the lower structure 100 in this state. Thus, the column 10 is in a vertical state in the lifting step and the descent step, and the axial direction of the column 10 and the axial direction of the anchor bolt 101 of the foundation 100 coincide with each other. Moreover, it becomes possible to prevent unnecessary interference between members at the time of joining the pillars 10, and the joining work of the pillars 10 can be performed smoothly.

  Further, in the column erecting method according to the present embodiment, the hooking member 20 for hooking the hook 41 is detachably attached to the column 10, so that the column 10 can be removed by removing the hooking member 20 from the column 10 after completion of the erecting operation. The protrusion from 10 disappears. For this reason, the safety of the operator can be maintained, interference with other members such as the outer wall and the interior material is eliminated, and the housing of the members is improved and the workability is improved. Furthermore, when loading the pillar 10 on a truck bed or the like or temporarily placing it on the construction site, by removing the hooking member 20, the load appearance is improved and the loading efficiency on the truck is improved. Temporary placement can be performed efficiently even at construction sites.

  Further, in the column erecting method according to this embodiment, the rotation of the hooking member 20 is restricted by the locking piece 23. Therefore, when the pillar 10 in the laid state is raised with the base plate 12 as a fulcrum, the hooking member 20 rotates, and when the pillar 10 is lifted, the action line of the tension of the wire 43 and the central axis of the pillar 10 are shifted. The situation can be avoided, and the posture of the pillar 10 at the time of lifting can be stabilized and the efficiency of the standing work can be improved.

  In addition, since the column erecting method according to the present embodiment includes a releasing step of releasing the hooked state of the hook 41 on the hooking member 20 by the operation of the pulling string 42, the hook 41 is removed by a stepladder or the like. This can be done easily without using the, so that the work efficiency can be further improved.

[Second Embodiment]
A second embodiment will be described with reference to FIGS. The lower structure in the present embodiment is a lower column when connecting columns up and down using a joint structure called a column coupler. FIG. 8 is a perspective view showing the lower column 200. FIG. 9 is a perspective view showing a state where the clipper 214 is attached to the column coupler 210 of the lower pillar 200. FIG. 10 is a perspective view showing a state where the upper column 150 is lowered downward. FIG. 11 is a perspective view illustrating a state in which the upper column 150 is joined to the lower column 200.

  The lower column 200 is formed of a square steel pipe having a substantially square cross section. As shown in FIG. 8, a column coupler 210 having a rectangular frame shape in plan view for joining the upper column 150 is provided at the upper end of the lower column 200. The column coupler 210 includes four holes 211 provided on the upper surface thereof and a clipper drop prevention plate 212. Four recesses that are recessed downward are formed at the four corners of the upper surface of the column coupler 210. The clipper drop prevention plate 212 is for preventing the clipper 214 from dropping, and is provided horizontally inside the column coupler 210.

  As shown in FIG. 9, a substantially rectangular parallelepiped clipper 214 is placed on the clipper drop prevention plate 212. In addition, bolts 217 projecting horizontally from the four corners of the clipper 214 are fitted into the recesses at the four corners of the column coupler 210, and nuts 215 and washers 216 are attached to the tips of the bolts 217. An alignment pin 213 is inserted into each of the four holes 211.

  The upper column 150 having the same cross-sectional shape as the lower column is joined to the lower column 200 configured as described above. As shown in FIG. 10, a column coupler 160 having a rectangular frame shape in plan view for joining to the lower column 200 is provided at the lower end of the upper column 150. The configuration of the column coupler 160 is the same as that of the column coupler 210.

  Next, with reference to FIG. 10, FIG. 11, the standing method of the pillar which concerns on 2nd embodiment is demonstrated. The column erecting method according to the second embodiment includes an attachment process, a hooking process, a lifting process, a descending process, a joining process, and a releasing process in this order. It is the same as the standing method. That is, in the column erecting method according to the second embodiment, the pair of hooking members 20 are attached to the upper column 150 in the mounting step, the hook 41 is hooked on the hooking member 20 in the hooking step, and the upper column in the lifting step. 150 is lifted vertically.

  Then, in the descending step, as shown in FIG. 10, in the state where the upper column 150 is maintained in the vertical state, the recesses 160a provided at the four corners of the column coupler 160 are nuts which are joint portions of the lower column 200 positioned below the recess 160a. The lifting machine is operated so as to be positioned above the 215 and the washer 216, and the hook 50 is lowered in this state, whereby the upper column 150 is lowered to the lower column 200.

  Next, in the joining step, the lower end of the upper pillar 150 is joined to the column coupler 210 of the lower pillar 200 located below the upper pillar 150. In the joining process, as shown in FIG. 11, the upper column 150 is placed on the lower column 200 with the four corner nuts 215 being pulled out, and the four corner nuts 215 are tightened, whereby the upper column 150 and the lower column are fixed. The bolt is temporarily tightened to 200. Then, the upper column 150 and the lower column 200 are finally tightened using a torque wrench, a shear wrench, or the like, and the joining process is completed. After the joining process is completed, a releasing process is performed by operating the pulling string 42 as in the first embodiment, and then the hooking member 20 is removed from the upper column 150.

  The operation and effect of the column erecting method according to the second embodiment will be described.

  According to the column erecting method according to the present embodiment, as in the first embodiment, since there are an attachment process, a hooking process, a lifting process, a lowering process, a joining process, and a releasing process, the same as in the first embodiment. The following effects can be obtained. In the second embodiment, since the clearance between the outer peripheral surface of the clipper 214 and the inner peripheral surface of the column coupler 160 is small, the alignment accuracy of the upper column 150 with respect to the lower column 200 is improved as compared with the first embodiment. More enhancement is required. Here, according to the column erecting method according to the second embodiment, it is possible to lower the upper column 150 while maintaining the vertical state in the lowering step. Positioning becomes easy, and work efficiency can be remarkably increased.

  The present invention is not limited to the embodiment described above.

  For example, the shapes of the pillar 10 and the hooking member 20 are not limited to those shown in FIGS. 1 and 2, and can be appropriately changed such as using H-shaped steel instead of the pillar 10. Further, the method of attaching the hooking member 20 to the pillar 10 is not limited to that shown in FIG. 3, and can be appropriately changed depending on the structure of the pillar 10 and the hooking member 20, etc. It is possible to appropriately change the aspect of the hooking step. Furthermore, for example, when the column erecting method according to the present invention is applied to a column having a flange instead of the column 10, the hooking member 20, the attaching step, and the hooking step may be omitted.

  Further, the hook 41 may not be able to be released from the hooked state by operating the pulling string 42, and a hook of a different type from the hook 41 may be used. Furthermore, the pillar 10 may be lifted by a lifting tool other than the hook.

  DESCRIPTION OF SYMBOLS 10 ... Column, 11 ... Side part, 11a ... Hole, 20 ... Hooking member, 21 ... Contact piece, 21a ... Insertion hole, 22 ... Extension piece, 22a ... Hooking hole, 23 ... Locking piece, 30 ... Bolt, 41 ... hook, 42 ... drawstring, 100 ... lower structure, 101 ... anchor bolt (joint), 150 ... upper pillar (column), 200 ... lower pillar (lower structure), 210 ... column coupler (joint) Part), 215 ... nut (joint part), 216 ... washer (joint part), 217 ... bolt (joint part).

Claims (4)

An attachment step of attaching a pair of hook members to a position above the center of gravity in the height direction on the two opposite sides of the column made of a square steel pipe,
A hooking step of hooking a hook of a hanging tool suspended from a lifting machine on the hooking member;
Lifting the hook of the lifting tool using the lifting machine, lifting the column vertically,
A lowering step of lowering the column to a predetermined position while maintaining a vertical state;
And a joining step of joining the lower end of the pillar to a lower structure located below the pillar.   In the attaching step, the hooking member is detachably attached to the two opposite side portions of the column by using bolts inserted into holes formed in the two opposite side portions of the column. 2. The column erecting method according to claim 1, wherein the column erecting method is performed. The hook member is
An abutment piece having an abutment surface that has an insertion hole through which the bolt is inserted and is in contact with a side portion of the column;
An extension piece extending from the contact piece in a direction opposite to the contact surface and having a hooking hole on which the hook is hooked;
Extending from the abutting piece in the opposite direction to the extending piece and restraining the rotation of the abutting piece about the bolt in the state where the pillar is lifted by being locked to the other side of the pillar. 3. The column erecting method according to claim 2, further comprising a locking piece. The hook is configured to be able to release the hooked state of the hook on the hooking member by operating a pull string,
The column erecting method according to claim 2 or 3, further comprising a releasing step of releasing the hooked state by an operation of the pulling string at a later stage of the joining step.

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