JP2017057615A - Temporary scaffolding of pile-type aquatic structure and its installation method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a temporary scaffolding of a pile-type aquatic structure, the scaffolding that is superior in versatility and can be installed at low cost and efficiently, and its installation method.SOLUTION: A temporary scaffolding 4 is installed under an upper structure 3 of a pile-type aquatic structure formed by making the upper structure 3 be supported in multiple piles 2, 2. The temporary scaffolding includes a fixing member 5 detachably mounted in the circumference of the pile 2, scaffolding boards 6 capable of being turned in the vertical direction supported in the fixing member 5, supporting legs 7 each having one end rotatably supported in the rear part of the scaffolding board 6 and the other end fixed to the outer circumference of the pile 2, and expansion means 8 for expanding the scaffolding board 6 to the horizontal position.SELECTED DRAWING: Figure 1

Description

  TECHNICAL FIELD The present invention relates to a temporary scaffold for a pile-type floating structure that is used by being attached to a pile when a lower portion of an upper structure such as a slab of a pile-type floating structure such as a pier is maintained and inspected.

  Conventionally, for ship mooring piers in harbors and fishing ports, etc., a pile-type water surface in which an upper structure such as a concrete slab is supported at the upper end of a pile such as a plurality of steel pipe piles or PC piles supported by the bottom of the water A structure is used.

  In such a pile-type floating structure, a certain height is secured between the water surface and the lower surface of the slab in order to prevent breakage due to wave uplift.

  On the other hand, since the bottom surface of the slab and the pile head of such a pile structure are constantly exposed to seawater, the deterioration progresses quickly due to the influence of seawater. Inspection is regarded as important.

  Such maintenance and inspection work on the lower surface of the slab or the upper end of the pile can be entered under a slab with a small ship and can be inspected and easily repaired, but is unstable due to fluctuations in waves and tide levels. Therefore, in particular, when repair work was required, it was necessary to install a temporary scaffold in the same way as onshore civil engineering work.

  Conventionally, a scaffold installed under such a slab is, for example, a support member such as an anchor fixed to the lower surface portion of the slab or a support constructed between adjacent pile heads via a chain or a rod-like support member. Temporary scaffolds in which scaffold plates are suspended are generally used (see, for example, Patent Document 1).

  In addition, such a temporary scaffold includes a floating body movable on the water surface under the slab, a floor body that forms a scaffold supported by the floating body so as to be movable up and down, and a lifting device that moves the floor body up and down relative to the floating body; And a fixing means for fixing the floor body to a pile such as a steel pipe pile, and the floor body constituting the scaffold can be installed at a predetermined height under the slab has been developed (for example, Patent Document 2) reference).

JP 2010-13822 A Japanese Patent Laid-Open No. 10-325126

  However, the work to install a temporary scaffold under an upper structure such as a slab is limited in the distance between the lower surface of the upper structure and the water surface, and a crane device or large-scale device cannot be inserted under the slab. Therefore, there was a problem that workability was poor because it had to rely mainly on human power.

  In particular, when the scaffold board is installed at a position that is a certain height away from the water surface, it is difficult to lift the scaffold board manually on an unstable ship.

  Moreover, the conventional temporary scaffold as shown in Patent Document 1 has a problem that the structure of the support work is complicated, time and labor are required for the installation of the support work, and the work period and work cost are increased. Since the distance between the piles of the structure is different for each structure, there is a problem that the versatility is poor.

  Moreover, the conventional scaffold device as shown in Patent Document 2 does not require human power for installation, but has a complicated structure and requires a large amount of power to move up and down the floor plate forming the scaffold, resulting in an increase in construction cost. There was a problem.

  Then, in view of such a conventional problem, the present invention was made for the purpose of providing a temporary scaffold for a pile-type floating structure that is excellent in versatility and can be installed inexpensively and efficiently, and a method for installing the temporary scaffold. It is.

  The feature of the invention according to claim 1 for solving the conventional problems as described above is a temporary scaffold installed under the upper structure of a pile-type floating structure in which the upper structure is supported by a pile. A fixing member that is detachably attached to the outer periphery of the pile, a scaffolding plate that is supported by the fixing member and that can rotate in the vertical direction, and one end of which is rotatably supported by the back surface of the scaffolding plate, It is in the temporary scaffold of a pile-type floating structure provided with the support leg fixed to the outer periphery of the said pile, and the expansion | deployment means which expand | deploy the said scaffold board to a horizontal position.

  According to a second aspect of the present invention, in addition to the configuration of the first aspect, the fixing member is fitted to a pile-side fixed body that is wound around and attached to the outer periphery of the pile, and the outside of the pile-side fixed body. A fixing member main body, and the fixing member main body is constituted by a divided fixing member divided into a plurality of parts, adjacent divided fixing members are rotatably connected to each other, and the divided fixing members at both ends can be attached to and detached from each other. It is to be connected.

  According to a third aspect of the present invention, in addition to the configuration of the second aspect, the split unit includes a scaffold unit that supports the scaffold plate, and the scaffold unit is folded when the scaffold plate is folded. This is because they are supported by each other.

  According to a fourth aspect of the present invention, in addition to the configuration of the second or third aspect, a wedge portion having an inclined surface directed toward the other side on an outer peripheral surface of the pile-side fixing body and / or an inner peripheral surface of the fixing member body It is in having.

  The feature of the invention described in claim 5 is that, in addition to the structure of any one of claims 1 to 4, a floating body attached to the tip of the scaffold plate is provided.

  According to a sixth aspect of the present invention, in the temporary scaffold installation method, the temporary scaffold is installed under the upper structure of the pile-type floating structure in which the upper structure is supported by the pile. A fixing member that can be attached, a scaffold plate that is supported by the fixing member and that can be rotated in the vertical direction, one end of the scaffold plate is rotatably supported, and the other end is fixed to the outer periphery of the pile. Using a temporary scaffolding provided with a supporting leg and a deployment means for deploying the scaffold plate to a horizontal position, raising the scaffold plate with respect to the water surface, and supporting the distal end side of the scaffold plate on the water surface In this state, the fixing member supported at the other end is fixed to the outer periphery of the pile, and then the scaffold plate is expanded to a horizontal position and the other end of the supporting leg is fixed to the pile. There is a temporary scaffolding installation method.

  As described above, the temporary scaffold for a pile-type floating structure according to the present invention is a temporary scaffold that is installed under the upper structure of a pile-type floating structure in which the pile is supported by the upper structure. A fixing member that is detachably attached to the outer periphery, a scaffold plate that is supported by the fixing member and that can be rotated in the vertical direction, and one end of which is rotatably supported on the back surface of the scaffold plate, and the other end of the pile. In a floating pile structure where the distance between the water surface and the upper structure is limited by providing support legs fixed to the outer periphery and deployment means for deploying the scaffold plate to a horizontal position, The scaffold can be easily installed at a predetermined height of the pile under the superstructure without using it.

  Further, in the present invention, the fixing member includes a pile side fixing body that is wound around and attached to the outer periphery of the pile, and a fixing member main body that fits outside the pile side fixing body. It is composed of a plurality of divided fixing members, and each adjacent divided fixing member is rotatably connected to each other, and the divided fixing members at both ends are detachably connected to each other. The fixing member main body can be easily fitted to the outer peripheral side of the pile.

  Furthermore, in the present invention, the scaffold unit is provided with a scaffold unit formed by supporting the scaffold plate on each of the divided fixing members, and the scaffold units are supported with each other in a state in which the scaffold plate is folded. A stable posture can be maintained in a folded state.

  In the present invention, the pile-side fixing body and the fixing member main body are provided with a wedge portion having an inclined surface directed toward the other side on the outer peripheral surface of the pile-side fixing body and / or the inner peripheral surface of the fixing member main body. Are pressed against each other in the pile radial direction and firmly tightened against the pile.

  Furthermore, in the present invention, by providing a floating body attached to the tip of the scaffold plate, the scaffold plate is floated on the water in a folded state, and in that state, fixed to a predetermined height of the pile. The height of the member can be maintained.

  The method of the present invention is a temporary scaffold installation method in which a temporary scaffold is installed under an upper structure of a pile-type floating structure in which the upper structure is supported by a pile, and a fixing member that is detachably attached to the outer periphery of the pile A scaffolding plate that can be rotated in the vertical direction supported by the fixing member, a support leg that is rotatably supported at one end on the back surface of the scaffolding plate, and the other end is fixed to the outer periphery of the pile; Using a temporary scaffold provided with a deployment means for deploying the scaffold plate to a horizontal position, raising the scaffold plate with respect to the water surface, and supporting the tip side of the scaffold plate on the water surface; The fixing member supported at the other end is fixed to the outer periphery of the pile, and then the scaffold plate is expanded to a horizontal position, and the other end of the supporting leg is fixed to the pile, thereby a crane or the like. Easy to use without using large-scale equipment It can be attached to the pile under the structure.

It is a front view which shows the embodiment of the temporary scaffold based on this invention. It is a top view same as the above. It is a partial expanded sectional view which shows the state of a fixing member. (A) is a top view which shows the unmounted state of the temporary scaffold in FIG. 1, (b) is the same front view. It is a figure which shows the 1st step in the installation method of the temporary scaffold which concerns on this invention, Comprising: (a) is a cross-sectional view, (b) is the AA sectional view. It is a figure which shows the 2nd step in the installation method of the temporary scaffold same as the above, (a) is a cross-sectional view, (b) is the AA sectional view. It is a figure which shows the 3rd step in the installation method of the temporary scaffold same as the above, (a) is a cross-sectional view, (b) is the AA sectional view. (A)-(c) is a partial side view which shows the expansion | deployment process of the scaffold board in the installation method of the temporary scaffold same as the above. It is a figure which shows the other Example of the temporary scaffold based on this invention, Comprising: (a)-(c) is a fragmentary sectional view which shows the expansion | deployment process of the scaffold board in the temporary scaffold.

  Next, an embodiment of a temporary scaffold for a pile-type floating structure according to the present invention will be described based on the examples shown in FIGS.

  1 and 2 show a state where a temporary scaffold is installed on a pile-type floating structure such as a pier, where reference numeral 1 is a water surface, reference numeral 2 is a pile such as a steel pipe pile, and reference numeral 3 is supported on the upper end of the pile 2. An upper structure such as a concrete slab, which is made, and a reference numeral 4 are temporary scaffolds installed on the pile 2.

  The temporary scaffold 4 has a fixing member 5 that is detachably attached to the outer periphery of the pile 2, a scaffolding plate 6 that is supported by the fixing member 5 and that can be rotated in the vertical direction, and one end of the scaffolding plate 6 that is freely rotatable on the back surface. And a support leg 7 whose other end is fixed to the outer periphery of the pile 2 and a deploying means 8 for deploying the scaffold plate 6 to a horizontal position. The scaffold plate 6 is attached to the pile 2 in a folded state. By deploying the scaffold plate 6 from the state, the scaffold can be installed at a predetermined height of the pile 2.

  In the figure, reference numeral 9 denotes an additional scaffold plate that is bridged between the adjacent scaffold plates 6 and 6.

  The fixing member 5 includes a pile-side fixing body 10 that is wound around and attached to the outer periphery of the pile 2, and a fixing member body 11 that fits outside the pile-side fixing body 10, and the pile-side fixing body 10 and the fixing member body 11. Can be firmly fixed to the pile 2 by engaging with each other.

  The pile-side fixed body 10 is formed in a band shape aligned with the pile 2 and includes a plurality of wedge portions 12, 12... Integrally projected on the outer peripheral surface thereof, and the outer periphery of the pile 2 such as a steel pipe pile. It can be fitted to the side and firmly fixed by tightening or welding.

  Each of the wedge portions 12, 12... Is formed in a wedge shape having an inclined surface 12a inclined toward the counterpart, that is, the fixed member 5 side, and protrudes at a certain interval in the circumferential direction.

  The fixing member main body 11 is constituted by arcuate divided fixing members 13, 13... Obtained by dividing a cylinder into a plurality of parts in the radial direction (6 divisions in this embodiment). It connects so that rotation is possible, and the division | segmentation fixing members 13 and 13 of both ends can be connected by a connection member (not shown).

  In each of the divided fixing members 13, 13..., An engagement groove 14 that engages with the wedge portions 12, 12... Of the pile-side fixing body 10 is formed on the inner peripheral portion. When the fixing member main body 11 is engaged, the wedge portions 12, 12... Of the pile side fixing body 10 are fitted into the engaging grooves 14, respectively, so that positioning in the circumferential direction can be performed.

  Further, the engagement groove 14 is formed in a wedge groove shape having an inclined surface 14a inclined toward the counterpart, that is, the pile-side fixed body 10 side, and the inclined surfaces of the engaged wedge portions 12, 12. 12 a and the inclined surface 14 a of the engaging groove 14 are pressed against each other, and the fixing member 5 is fastened to the pile 2.

  Further, the scaffolding plate 6 is fixed to the outer peripheral surface of each of the divided fixing members 13, 13 ..., and the scaffolding units 15, 15 ... are formed by the divided fixing member 13, the scaffolding plate 6 and the support legs 7, respectively. In addition, each of the scaffold units 15, 15... Is connected via divided fixing members 13 and 13.

  The scaffold plate 6 includes a temporary scaffold portion 20 fixed to the divided fixing member 13, and a permanent scaffold portion 22 that is rotatably connected to the temporary scaffold portion 20 via a rotation shaft 21, and when folded, The temporary scaffolding portion 20 and the permanent scaffolding portion 22 form a reverse L-shape when viewed from the side, and when deployed, the temporary scaffolding portion 20 and the permanent scaffolding portion 22 continuously form a rectangular shape in plan view in the horizontal direction. It has become.

  Although not particularly shown, the scaffold plate 6 desirably includes a fixing means for fixing the temporary scaffold portion 20 and the permanent scaffold portion 22 in a folded state.

  The permanent scaffold 22 is formed in a rectangular shape, and a handrail 23 is attached to the top surface of the tip.

  In addition, in the state where the floating body 24 is detachably fixed to the outer side surface portion of the handrail 23 in the permanent scaffold portion 22, the scaffold plate 6 is folded, and the permanent scaffold portion 22 is raised, the scaffold units 15, 15. .. are floating on the water while being supported by each other.

  The arrangement of the scaffold units 15, 15... Is only required to be supported by each other. For example, as shown in FIG. 3, a pair of adjacent scaffold units 15, 15. By arranging, they can be supported and stably floated on the water.

  Further, the length of the main scaffold 22 is aligned with the distance from the water surface to the fixing member 5 when the floating body 24 is floated on the water with the scaffold plate 6 folded. The split fixing member 13 is held at the upper end of the permanent scaffold portion 22 via the temporary scaffold portion 20 according to the height of the pile-side fixed body 10.

  The floating body 24 is formed in a hollow shape, and the buoyancy can be adjusted by pouring and draining.

  The support leg 7 is formed in a rod shape having a predetermined length, one end is rotatably connected to the lower surface of the permanent scaffold 22, and the other end is rotatably fixed to the movable ring 30. In the unfolded state, a desired angle is formed with respect to the scaffold plate 6, and the other end is fixed to the outer periphery of the pile 2 via the movable ring 30 at that position, and the reaction force is applied to the pile 2 to act on the scaffold plate 6. It is designed to resist the load to be applied.

  The movable ring 30 is constituted by arc-shaped divided ring members 31, 31... Obtained by dividing a cylinder into a plurality of pieces in the radial direction (six divided in this embodiment), and the space between the adjacent divided ring members 31, 31 is horizontal. The ring members 31 and 31 at both ends can be detachably connected by a connecting member (not shown).

  Although the unfolding means 8 is not particularly limited, in the present embodiment, a small winch 40 such as a manual winch placed on the temporary scaffold 20 is used, and the tip of the wire 41 fed out from the small winch 40 is used as the movable ring 30. The link 41 is wound up, and the movable ring 30 is lifted to operate the link mechanism including the pile 2, the scaffolding plate 6 and the supporting leg 7, thereby lifting the permanent scaffolding portion 22. .

  Next, the installation method of this temporary scaffold 4 is demonstrated.

  First, as shown in FIG. 5, the pile side fixing body 10 is fixed to a predetermined height on the outer periphery of the pile 2 such as a steel pipe pile.

  Next, as shown in FIG. 6, the temporary scaffold 4 is floated on the water with the scaffold plates 6 folded, and the scaffold units 15, 15. 15,15 ... are supported by each other.

  Then, the U-shaped opening side is directed to the pile 2, and the water is moved toward the outer periphery of the pile 2 in this state, and the respective scaffold units 15, 15... Are arranged along the outer periphery of the pile 2.

  At that time, each of the divided fixing members 13, 13... Constituting the fixing member main body 11 is held at a high position by the length of the main scaffold 22, and the height of the pile-side fixing body 10 is set. The heights of the divided fixing members 13, 13.

  Then, as shown in FIG. 7, the divided fixing members 13, 13... Are wound with the positions of the engagement grooves 14 and the wedge portions 12, 12. By connecting 13, the pile-side fixed body 10 and the fixing member main body 11 are fitted to each other, and the base end side of the scaffold plate 6 is fixed to the outer periphery of the pile 2.

  Moreover, the split ring members 31 and 31 which comprise the movable ring 30 of both ends are wound around the pile 2, and the split ring members 31 and 31 of both ends are connected in that state, and the movable ring 30 is moved up and down to the outside of the pile 2. Fit as possible.

  In this state, the floating body 24 may be removed from the end of the scaffold plate 6, and in this case, resistance from the water surface can be reduced when the scaffold plate 6 is deployed.

  8 (a) to 8 (c), the unfolding means 8 is operated, that is, the wire 41 is wound up by the small winch 40 and the movable ring 30 is lifted, whereby the support leg 7 is lifted. The proximal end side rises, and the distal end side of the permanent scaffold portion 22 is lifted by the link mechanism including the pile 2, the scaffold plate 6, and the support legs 7.

  And if the scaffold board | plate 6 is expand | deployed to the position where the permanent scaffold part 22 becomes horizontal, the small winch 40 will be stopped in the position and the movable ring 30 will be fixed to the pile 2. FIG.

  Then, the additional scaffolding plate 9 is bridged between the scaffolding plates 6 as necessary, and the installation of the temporary scaffolding 4 is completed.

  On the other hand, in order to remove the temporary scaffold 4, when the wire 41 is pulled out from the small winch 40, the movable scaffold 30 is lowered while the permanent scaffold portion 22 is rotated in the order of FIGS. The scaffold board 6 is folded.

  In this state, the floating body 24 is attached to the lower end of the permanent scaffold 22, and then the divided fixed members 13 and 13 and the divided ring members 31 and 31 at both ends are detached, and the fixed member main body 11 and the movable ring are separated. 30 is removed from the pile 2, and the temporary scaffold 4 is moved and removed from the pile 2 while supporting the respective scaffold units 15, 15.

  The temporary scaffolding 4 of the pile-type floating structure constructed in this way attaches the fixing member 5 using the scaffolding plate 6 (the permanent scaffolding portion 22) as a support, and deploys the scaffolding plate 6 from the state by the deployment means 8. Accordingly, the scaffold can be installed at a predetermined height of the pile 2 without using a large-scale device such as a crane.

  In the unfolded state, when a person or material is placed on the scaffolding plate 6 and a downward load acts on the scaffolding plate 6, a downward load acts on the fixing member main body 11, and the wedge portions 12, 12. A force is applied in a direction in which the inclined surface 12a of the engaging groove 14 and the inclined surface 14a of the engaging groove 14 are pressed against each other, and the tightening force of the fixing member 5 against the pile 2 is increased accordingly. Can be supported.

  Furthermore, the scaffold plate 6 is supported by a support leg 7 fixed at one end to the pile 2, and the support leg 7 counteracts the pile 2 with a reaction force against the load acting on the scaffold plate 6. The scaffold plate 6 can be held in a stable state.

  The aspect of the support leg 7 is not limited to the above-described embodiment. For example, as shown in FIG. 9, the support leg 50 is a pair of support leg members 52 a that are rotatably connected to each other by a support shaft 51. , 52b, and the end of one support leg member 52a is rotatably fixed to a fixing member 5 fixed to a predetermined height position of the pile 2, and the end of the other support leg member 52b is fixed to the permanent scaffold You may form in the shape which is connected with the lower surface part of the board part 22 so that rotation is possible, and can be bent in the middle.

  The fixing member 5 is configured in the same manner as the fixing member 5 for fixing the scaffold plate 6 described above, and can be firmly fixed to the pile 2. The same components as those in the above-described embodiment are denoted by the same reference numerals and description thereof is omitted.

  This support leg 50 forms a link mechanism with the pile 2 and the scaffold board 6 and extends in conjunction with the deployment of the scaffold board 6 so as to support the scaffold board 6 in a state where both the support leg members 52a and 52b are continuous. It has become.

  In this case, both supporting leg members 52a and 52b can be fixed by pin 53 fixing or the like in a state where they are linearly extended.

  In addition, the aspect of the fixing member 5 is not limited to the above-mentioned Example, For example, the fall resistance part which consists of a member with a high friction coefficient is provided inside the annular fixing member, and a fixing member can be directly fixed to the pile 2 What was made may be sufficient, and what was made to fix with the fixing tools, such as a volt | bolt, with respect to the pile 2 may be used.

DESCRIPTION OF SYMBOLS 1 Water surface 2 Pile 3 Superstructure 4 Temporary scaffold 5 Fixing member 6 Scaffold plate 7 Supporting leg 8 Unfolding means 9 Additional scaffold plate 10 Pile side fixed body 11 Fixing member main body 12 Wedge part 13 Split fixing member 14 Engaging groove 15 Scaffolding unit 20 Temporary scaffolding 21 Rotating shaft 22 Permanent scaffolding 23 Handrail 24 Floating body 30 Movable ring 31 Split ring member 40 Small winch 41 Wire

Claims (6)

In the temporary scaffolding installed under the upper structure of the pile-type floating structure with the upper structure supported by the pile,
A fixing member that is detachably attached to the outer periphery of the pile, a scaffolding plate that is supported by the fixing member and that can rotate in the vertical direction, and one end of which is rotatably supported by the back surface of the scaffolding plate, A temporary scaffold for a pile-type floating structure, comprising: a support leg fixed to an outer periphery of the pile; and deployment means for deploying the scaffold plate to a horizontal position. The fixing member includes a pile-side fixing body that is wound around and attached to the outer periphery of the pile, and a fixing member body that fits outside the pile-side fixing body,
The fixing member main body is constituted by a plurality of divided fixing members, and adjacent divided fixing members are rotatably connected to each other, and the divided fixing members at both ends are detachably connected to each other. The temporary scaffold of the pile-type floating structure of Claim 1.   The pile-type floating structure according to claim 2, further comprising a scaffold unit configured to support the scaffold plate on each of the divided fixing members, wherein the scaffold units are supported with each other in a state in which the scaffold plate is folded. Temporary scaffolding.   The temporary scaffold for a pile-type floating structure according to claim 2 or 3, further comprising a wedge portion having an inclined surface directed toward the other side on an outer peripheral surface of the pile-side fixed body and / or an inner peripheral surface of the fixing member main body.   The temporary scaffold of the pile type floating structure of any one of Claims 1-4 provided with the floating body attached to the front-end | tip part of the said scaffold board. In the installation method of the temporary scaffold in which the temporary scaffold is installed under the upper structure of the pile-type floating structure with the pile supporting the upper structure,
A fixing member that is detachably attached to the outer periphery of the pile, a scaffolding plate that is supported by the fixing member and that can rotate in the vertical direction, and one end of which is rotatably supported by the back surface of the scaffolding plate, Using a temporary scaffold comprising support legs fixed to the outer periphery of the pile, and deployment means for deploying the scaffold plate to a horizontal position,
The scaffolding plate is raised with respect to the water surface, and the tip side of the scaffolding plate is supported on the water surface, and the fixing member supported on the other end is fixed to the outer periphery of the pile, and then The installation method of the temporary scaffold characterized by expanding the said scaffold board to a horizontal position, and fixing the other end of the said support leg to the said pile.

Images