JP5087154B2 - Construction method and scaffold structure of water structure - Google Patents

Description

  The present invention relates to a scaffold construction method for a water structure and a scaffold structure for installing a scaffold under an upper structure located above the water surface, used when inspecting or repairing the upper structure of a water structure such as a pier. .

2. Description of the Related Art Conventionally, when performing maintenance, maintenance management, repair work, etc. of a high-rise structure such as an elevated road or a bridge, a scaffold is known that is suspended below a place where maintenance, maintenance management, repair work, etc. are performed.
As such a scaffold, for example, a steel pipe in which an anchor base material is fixed with bolts embedded in the abdomen side surfaces of a pair of girders arranged side by side and hung at the lower end of a suspension chain suspended on the anchor base material There is a construction in which another construction member is placed so as to cross these and fixed so as not to move, and a work road plate is installed on each construction member between the left and right suspension chains ( Patent Document 1).

  Scaffolds using this suspension chain can be used to inspect, repair, reinforce, remove, and remove upper structures located on the surface of water structures such as piers, ship mooring facilities (dolphins), or piers. The same applies to reconstruction.

JP-A-6-212706

However, when a scaffold using a conventional suspension chain is applied to an aquatic structure, when the scaffold is constructed, the upper structure (for example, the beam side of a pier) is drilled with a drill or the like to fix the suspension chain. Then, the fixing base such as the anchor base material is attached, but it is necessary to prepare a scaffold for performing this drilling work, and since a pontoon or a small ship is used as the scaffold, the work on the unstable scaffold I had to be.
In other words, the drilling work is performed at a position higher than overhead, and since the scaffold is a floating body, the scaffold is shaken by waves, etc., making it unstable and difficult to apply force. It was inevitable that this was a difficult task.

In addition, the conventional suspension chain scaffolding has a substantially constant suspension chain that suspends a construction member for forming the work space over the entire floor space of the work space so as to block the work space obtained by constructing the scaffold. Since it is stretched in the vertical direction at intervals, it was not possible to freely move the work space and secure a wide work space.
Therefore, when a scaffold using a conventional suspension chain is applied to a water structure, a reduction in work efficiency is inevitable not only in the construction work of the scaffold but also in various work on the scaffold after construction of the scaffold.

  The object of the present invention is to efficiently perform not only the scaffold construction work but also various kinds of work on the scaffold after the construction of the scaffold. It is intended to provide a scaffold construction method for a water structure and a scaffold structure that can be shortened.

In order to achieve the above object, a scaffold construction method for a water structure according to the present invention includes a water structure having an upper structure that is supported by a plurality of legs protruding above the water surface from the water and positioned above the water surface. In the water structure scaffolding construction method in which a scaffold located below the upper structure is installed, the weights below the water surface are connected so that the legs of the water structure are connected and do not move along at least the legs. The connecting member mounted in the underwater position excluding the part where the anti-corrosion coating is applied holds the load of the scaffold constructed under the superstructure , and the connecting member is a rod-like member that can expand and contract in the axial direction of the member. It is characterized in detachable der Rukoto between the legs.

Further, the scaffold construction method of water structure in accordance with another aspect of the invention, the connecting member is characterized that you suppress sway scaffold constructed in floating below the superstructure.
Further, the scaffold structure according to the present invention is located below the upper structure in a water area structure including an upper structure that is supported by a plurality of legs protruding above the water surface from the water and positioned above the water surface. In the scaffold structure for installing the scaffold to be connected , the plurality of legs are connected to each other so that they do not move along at least the legs. The member is provided with a scaffold support member that transmits the load of the scaffold, and the scaffold support member is attached to the base piece and is configured to open and close the base piece, and is configured to be openable and closable. a strut member, said connecting member detachably mounted to, the closing operation of the strut member, in a state where the base member is the fixing base and closing operation sealed engagement and tightly fixed to the connecting member As a feature That.

According to the scaffold construction method for an aquatic structure according to the present invention, the upper structure is provided in an aquatic structure provided with an upper structure that is supported by a plurality of legs protruding above the water surface from the water and positioned above the water surface. In the construction method of a water structure scaffolding, where a scaffold located under the object is installed, a heavy anti-corrosion coating is applied below the water surface so that the legs of the water structure are connected and do not move at least along the legs. The connecting member mounted at the underwater position excluding the part holds the load of the scaffold constructed under the superstructure , and the connecting member is a rod-like member that can be expanded and contracted in the axial direction of the member between the existing legs. detachable der because prevents ensuring free movement and large working space of the working space, for example, does not require a hanging chain hang the installation member for forming a working space, just construction work scaffolding Not after building a scaffold Also in various operations on the field, efficiently can be performed, it is possible to shorten the working time required for reduction and scaffolding building scaffolding construction work dangerous.
Furthermore, scaffolding structure according to the invention can be realized by the scaffold construction method of water structure according to the present invention.

It is explanatory drawing which shows typically the scaffold structure of the water body structure which concerns on 1st embodiment of this invention. It is plane explanatory drawing which shows the steel pipe pile mounting state of the connection member of FIG. The wedge-shaped member moving mechanism which moves the wedge-shaped member which fixes and hold | maintains a connection member to a steel pipe pile is shown, (a) is schematic explanatory drawing of the state with which the sheath pipe member was fixed to the steel pipe pile, (b) is a wedge-shaped member moving mechanism. It is explanatory drawing of the provided sheath tube member. The specific example of the scaffold support member of FIG. 1 is shown, (a) is a top view, (b) is a front view. It is explanatory drawing which shows the state which the fixed base of the scaffold support member of FIG. 1 pinched | interposed the connection member. The state which the connection member was fixed to the steel pipe pile under the surface of the water is shown, (a) is the explanatory view which looked at the connection member from the side, and (b) is the explanatory view which looked at the connection member from the upper part. The attachment method to the connection member of a scaffold support member is shown, (a) is explanatory drawing of the scaffold support member conveyed to the installation place, (b) is the description of the state which fixed the fixed base of the scaffold support member to the connection member FIG. The method of fixing the fixed base part of a scaffolding support member to a connection member is shown, (a) is explanatory drawing of the state which fixed base part was located in the connection member, (b) is the description of the state which fixed the fixed base part to the connection member FIG. The method of forming a scaffold floor is shown, (a) is explanatory drawing of the state which installed the scaffold beam, (b) is explanatory drawing of the state which installed the scaffold floor. The method of forming a scaffold using the scaffold unit in the scaffold structure of the water body structure which concerns on 2nd embodiment of this invention is shown, (a) is explanatory drawing of the scaffold unit carried to the installation place, (b) is It is explanatory drawing of the state which mounted | wore the coupling member to the connection member via the scaffold support member. The method of forming a scaffold using the floor member support unit in the scaffold structure of the water structure according to the third embodiment of the present invention is shown, (a) is an explanatory plan view of the scaffold, (b) is a plan view of (a). It is explanatory drawing by a BB cross section. It is an isometric view explanatory drawing of the draft adjustment scaffold unit in the scaffold structure of the water body structure which concerns on 4th embodiment of this invention. The method of forming a scaffold using the draft adjustment scaffold unit of FIG. 12 is shown, (a) is plane explanatory drawing of a scaffold, (b) is explanatory drawing seen from the B direction of (a). The method to form a scaffold using the floating beam receiving member in the scaffold structure of the water body structure which concerns on 5th embodiment of this invention is shown, (a) is plane explanatory drawing of a scaffold, (b) is (a). It is explanatory drawing by a BB cross section.

Hereinafter, embodiments for carrying out the present invention will be described with reference to the drawings.
(First embodiment)
FIG. 1 is an explanatory view schematically showing a scaffold structure of a water structure according to the first embodiment of the present invention. As shown in FIG. 1, a scaffold 10 for a water structure is positioned below an upper structure 12 included in a water structure 11 such as a pier, a ship mooring facility (dolphin), or a bridge pier. Installed.

The upper structure 12 has a water surface W.D. L is supported by a plurality of steel pipe piles (leg portions) 13 (three are shown as an example) protruding upward. Located above L. The steel pipe pile 13 is driven in the vertical direction at a predetermined pitch on the bottom of the seabed, riverbed or lake bottom. It has the upper structure 12 constructed | assembled in the pile upper end part located in the predetermined height above L.
The surface of water W. A heavy anti-corrosion coating a consisting of a lining or surface coating using a polyethylene coating or urethane elastomer coating is applied to the range from the upper protruding portion to approximately 1 m below the envy average low tide surface for rust and corrosion protection. Has been. Although many steel structures are adopted for the legs of the water structure part 11, when the steel structure is adopted, the water surface W. It is desirable to apply a heavy anti-corrosion treatment to the splash zone in the vicinity of L, and the heavy anti-corrosion coating a is a construction aspect that is essential in the water area structure 11 in the sea area.

  The scaffold 10 is supported by a scaffold support member 15 attached to a connecting member 14 fixedly held by the steel pipe pile 13, and the water surface W.V. It is located above L and has a scaffold floor formed by the scaffold forming member 16. Scaffolding floors are used when workers (not shown) perform various operations such as inspection, repair, reinforcement, removal, and reconstruction for maintenance / maintenance and repair / improvement of the superstructure 12. Used as a work place. This scaffold floor has a water surface W.D when the worker is performing various operations. It may be located above L, for example, it may be submerged under the sea level at the time of high tide when the worker is not performing various operations in the sea area.

  The connecting member 14 has a predetermined position below the water surface of each of the adjacent steel pipe piles 13, that is, the water surface W.W, so as to connect two adjacent steel pipe piles 13 of the plurality of steel pipe piles 13. It is removably mounted at an underwater position excluding a portion where the heavy anticorrosive coating a below L is applied, preferably at the uppermost part of the underwater position. In addition, this connection member 14 does not necessarily need to be located in water, and if it can be mounted | worn without damaging the heavy-duty anticorrosion film a, you may be located in the part to which the heavy-duty anticorrosion film a was given. The connecting member 14 has a telescopic structure that can be stretched between both ends, and is fixedly held at a predetermined position of each steel pipe pile 13. As the connecting member 14, for example, a “strut” already filed by the applicant of the present application. "Member" (refer to JP 2008-223384 A) can be used.

  In addition, in order to reinforce the water structure 11, for example, a reinforcing member for connecting the steel pipe piles 13 is already attached to a place below the upper structure 12 where the scaffold 10 is to be installed. When this reinforcing member has the same function as the connecting member 14 constituting the scaffold 10, it is not necessary to provide the connecting member 14 again, and an existing reinforcing member may be used instead of the connecting member 14. .

  FIG. 2 is an explanatory plan view showing a steel pipe pile mounting state of the connecting member of FIG. 1. As shown in FIG. 2, each of the connecting members 14 includes, for example, an outer tube 17 and an inner tube 18 made of a tubular body such as a general structural carbon steel pipe (STK), and the outer tube 17 and the inner tube 18. And a sheath tube member 19 provided at the outer end. The connecting member 14 is a length whose length changes when the inner tube 18 inserted into the outer tube 17 so as to be relatively movable in the longitudinal direction is pulled out or pushed into the inner tube insertion end of the outer tube 17. It is formed to be freely stretchable in the direction.

  The sheath pipe member 19 is suitable for enclosing the steel pipe pile 13 from the outside, and is in close contact with the outer surface of the steel pipe pile 13 in a bowl shape in which the pipe body is halved and in the state of surrounding the steel pipe pile 13. Instead, the diameter is increased so as to have a predetermined gap with the outer surface. An outward flange 19a is projected on both sides of the sheath tube member 19, and for example, mounting holes (not shown) for attaching bolts and nuts for joining are opened in the flange 19a. .

  This connecting member 14 is adjusted between the two adjacent steel pipe piles 13 and 13 to such a length that the sheath pipe members 19 and 19 at both ends are respectively positioned outside the outer peripheral surface of the steel pipe pile 13. The connecting member 14 whose length has been adjusted is a wedge-shaped member (not shown) at, for example, two positions in the diameter position in the gap between the inner peripheral surface of the outer tube 17 and the outer peripheral surface of the inner tube 18 inserted into the outer tube 17. , The movement of the inner pipe 18 relative to the outer pipe 17 is prevented, and the sheath pipe members 19 and 19 at both ends are held in a state where they are positioned outside the outer peripheral surface of the steel pipe pile 13. That is, the connecting member 14 is attached to the steel pipe pile 13 so as to be detachable by changing the length according to the distance between the steel pipe piles to be attached.

Moreover, as shown in FIG. 2, the sheath pipe member 19 located in the outer peripheral surface outer side of the steel pipe pile 13 uses the flange 19a of a pair of sheath pipe members 19 which pinch | interpose the steel pipe pile 13, for example using a bolt and a nut. By joining, the cylindrical sheath pipe which includes the steel pipe pile 13 with a gap | interval between the outer peripheral surfaces of the steel pipe pile 13 is formed.
In addition, when the connection member 14 is arrange | positioned only on the one side of the steel pipe pile 13 without pinching the steel pipe pile 13, it is for the sheath pipe formation provided with the same shape and function as the sheath pipe member 19 on the other side of the steel pipe pile 13. By preparing the member 20 and joining the flanges 19a, 20a of the sheath tube member 19 and the sheath tube forming member 20 sandwiching the steel tube pile 13, there is a gap between the outer periphery of the steel tube pile 13 Thus, a cylindrical sheath pipe containing the steel pipe pile 13 can be formed.

Bolts and nuts are used to join the flanges 19a and 19a and the flanges 19a and 20a.
Thereby, the sheath pipe member 19 is mutually joined on both sides of the steel pipe pile 13, and the some connection member 14 is integrally mounted in the state which connected between the adjacent piles of the some steel pipe pile 13. FIG.
The pair of sheathed tube members 19 or the cylindrical sheath tube formed of the sheath tube member 19 and the sheath tube forming member 20 sandwiching the steel tube pile 13 is, for example, a wedge-shaped member 21 and a water surface W.P. The steel pipe pile 13 below L can be fixed and held, whereby the connecting member 14 disposed between the adjacent steel pipe piles 13 can be fixed and held in water.

  In addition, the connecting member 14 having the above-described configuration can be easily retrofitted to the existing steel pipe pile 13, and further, the total length can be freely adjusted by expanding and contracting, so that the unit can be unitized. become. This is because mass production can be performed in advance and fine adjustment can be performed at the site where the scaffolding is constructed, so that it is not necessary to investigate the dimensions of the connecting member 14 to be manufactured in advance.

  3A and 3B show a wedge-shaped member moving mechanism for moving a wedge-shaped member that fixes and holds the connecting member to the steel pipe pile. FIG. 3A is a schematic explanatory view of a state in which the sheath pipe member is fixed to the steel pipe pile. FIG. It is explanatory drawing of the sheath pipe member provided with the member moving mechanism. As shown in FIG. 3 (a), the sheath tube member 19 is formed in the gap between the inner surface of the cylindrical sheath tube containing the steel tube pile 13, that is, the inner surface of the sheath tube member 19 and the outer surface of the steel tube pile 13. The wedge-shaped member 21 is driven from at least the lower end of the upper and lower ends. By driving the wedge-shaped member 21, the inner surface of the sheath tube forming member 20 and the steel pipe pile 13 are brought into a pressure-bonded state via the wedge-shaped member 21.

As a result, the frictional force between the outer surface of the steel pipe pile 13 and the inner surface of the sheath pipe forming member 20 increases, so that the sheath pipe, that is, the connecting member 14 does not fall along the steel pipe pile 13. It is held fixed. Therefore, the connecting member 14 can be mounted and fixed at an arbitrary height from the bottom surface of the steel pipe pile 13 to directly below the upper structure 12.
The wedge-shaped member 21 can be driven between the steel pipe pile 13 and the sheath tube member 19 by a wedge-shaped member moving mechanism.

  As shown in FIG. 3B, the wedge-shaped member moving mechanism is provided in the sheath tube member 19 provided in the outer tube 17 (or the inner tube 18), and the tip of the wedge-shaped member 21 is provided at the lower end of the sheath tube member. 19, a long bolt 22a fixed toward the inner peripheral surface of the lower end, a nut 22b fixed by screwing the long bolt 22a to the sheath tube member 19, and a long bolt 22a movably penetrating the sheath tube member. 19 and a guide pipe 22 c fixed to 19. The wedge-shaped member moving mechanism is provided not only in the sheath tube member 19 but also in the sheath tube forming member 20, and at least two pairs that are paired at a diameter position of the steel tube pile 13 with respect to one steel tube pile 13. Is installed.

  As shown to Fig.3 (a), in the state which penetrated the steel pipe pile 13 in the sheath pipe formed by joining the sheath pipe members 19 or the sheath pipe member 19 and the sheath pipe formation member 20, of the steel pipe pile 13 of FIG. When the connecting member 14 is arranged at a predetermined position, the wedge-shaped member 21 is in a state where the tip is faced between the steel pipe pile 13 and the sheath pipe member 19, so that when the long bolt 22a is rotated leftward, for example, the long bolt 22a is The whole ascends with respect to the sheath tube member 19 while being guided by the guide pipe 22c through the nut 22b. As the entire long bolt 22 a rises, the wedge-shaped member 21 enters the gap between the steel pipe pile 13 and the sheath pipe member 19 from the tip, and the wedge-shaped member 21 is driven between the steel pipe pile 13 and the sheath pipe member 19. Thus, the annular sheath pipe is fixed to the steel pipe pile 13.

  The projecting amount of the long bolt 22a above the nut 22b can be set to an arbitrary length. A predetermined position below the water surface of the steel pipe pile 13, that is, the water surface W.V. The upper end portion of the long bolt 22a is connected to the water surface W.R. with respect to the connecting member 14 mounted on the underwater portion except the portion to which the heavy anticorrosive coating a below L is applied, preferably the uppermost portion thereof. L is set to a length that is exposed above L. By rotating the long bolt 22a from above L, the wedge-shaped member 21 can be driven between the steel pipe pile 13 and the sheath pipe (sheath pipe member 19) in water.

  FIG. 4 shows a specific example of the scaffold support member of FIG. 1, wherein (a) is a plan view and (b) is a front view. As shown in FIG. 4, the scaffold support member 15 has a fixed base portion (connecting member locking portion) 23 and a support member (operation portion) 24 provided on the fixed base portion 23, and can be detached from the connecting member 14. And is attached to the connecting member 14 from the fixed base 23 to the water surface W. The strut member 24 protrudes in the L direction from the water surface W. It is positioned above L and supported.

The fixed base 23 is, for example, a pair of base pieces 23a and 23a formed by processing a rectangular iron plate into a curved surface shape corresponding to the outer peripheral surface shape of the outer tube 17 and the inner tube 18, and the concave side is in the same direction. In this way, the sides are connected to each other by the hinge 23b so that a closing operation to approach each other and an opening operation to separate from each other are possible (see arrows in FIG. 4).
For this reason, the fixed base 23 is positioned outside the outer peripheral surface of the connecting member 14 in the open state, and then closed so that the fixing base 23 covers the majority of the outer peripheral surface of the connecting member 14 and closely contacts the outer peripheral surface. 14 can be engaged.

  On the inner peripheral surfaces of the pair of base pieces 23a, 23a, a thin sheet for preventing slipping so that the fixed base 23 in the closed state does not slide and move between the outer peripheral surfaces of the connecting members 14. The rubber member 23c is affixed. The rubber member 23c can be pressure-bonded to the connecting member 14 when the fixed base 23 is in a closed state, and the rotation of the fixed base 23 relative to the connecting member 14 can be prevented by a frictional force. Since the rubber member 23c conforms to the unevenness of the outer surface of the connecting member 14, fine adjustment of the curved surface shape of the connecting member 14 (the outer tube 17 and the inner tube 18) to which the fixed base 23 is mounted and fixed becomes unnecessary. . For this reason, even when a reinforcing member for connecting an existing steel pipe pile 13 is used in place of the newly installed connecting member 14, the fixing base 23 can be mounted and fixed. There is no need to clean.

  The lower end of a column member 24 made of, for example, a single pipe pipe made of steel pipe is provided on the outer peripheral surface of each base piece 23a opposite to the hinge connection side via a column mounting member 23d fixed to the outer peripheral surface. The side is attached. The support member 24 penetrates the support attachment member 23d so as to have a projecting lower end 24a protruding downward from the support attachment member 23d, and is extended and fixed in a direction orthogonal to the hinge connection side.

  In other words, the upper ends of the support members 24, 24 attached to the pair of base pieces 23a, 23a can be brought close to each other to bring the fixed base 23 into an open state. The fixed base 23 sandwiching the member 14 can be closed. When the fixed base 23 is in the closed state, the fixed base 23 is in a state of being clamped from both sides with the connecting member 14 interposed therebetween, and the both strut members 24 and 24 are held without moving further away from each other. .

FIG. 5 is an explanatory view showing a state in which the fixed base of the scaffold support member of FIG. 1 sandwiches the connecting member. As shown in FIG. 5, the scaffold support member 15 that is locked to the connecting member 14 with the fixed base 23 in the closed state has both support members 24 and 24 attached to the fixed base 23 as the bottom. In this way, the upper end position is held at a predetermined height.
This strut member 24 has a water surface W.P. Projecting in the L direction (see FIG. 1), the upper end of the column member 24 is, for example, the water surface W.P. Water surface W. It has a length that can be positioned in the vicinity of L.

  Accordingly, both the strut members 24 and 24 of the scaffolding support member 15 with the fixed base 23 locked to the connecting member 14 are formed on the water surface W.V. It functions as an operating means (opening / closing operation member) capable of opening and closing the fixed base 23 via the upper end portion 24b of the column member 24 located in the vicinity of L, and the scaffold support member 15 puts the fixed base 23 in the closed state. In this case, the scaffold 10 mounted on both support members 24, 24 is attached to the water surface W.D. It functions as a supporting means that can be supported so as to be held at a predetermined position above L.

Thus, the scaffold support member 15 has the above-described configuration, so L has a mounting mechanism that enables the scaffold support member 15 to be mounted on the connecting member 14 fixedly held at a predetermined position below the water surface by a mounting operation from above. The scaffold support member 15 can be easily attached to or detached from the connecting member 14 by remote control from above L.
In addition, the scaffold support member 15 with the fixed base 23 locked to the connecting member 14 projects the lower end 24a projecting downward from the column mounting member 23d in a state where both column members 24, 24 are held in a V shape. The projecting lower end 24 a is positioned below the connecting member 14. For this reason, it is possible to resist the force that lifts the scaffold 10 over the entire scaffold 10 due to the influence of waves or the like, that is, the lifting pressure.

  As shown in FIG. 5, the scaffold forming member 16 includes a beam member 16 a attached to both support members 24 and 24, and a floor member 16 b attached to the beam member 16 a and serving as a scaffold floor. Form. The beam member 16a is made of, for example, a single pipe pipe made of steel pipe, and is detachably attached to the upper end portion 24b of the column member 24 by a clamping means (not shown) such as a single pipe clamp. The floor member 16b is, for example, An expanded metal is used and is detachably attached to the beam member 16a by an attachment member (not shown).

Next, the installation method of the scaffold 10 with which the water body structure 11 is provided below the upper structure 12, such as a pier superstructure, will be described.
First, at a position away from the water body structure 11, the connecting member 14 having a nested structure is shortened between both ends, and a buoyant body is attached so as not to be submerged. For example, the sheath tube member 19 is positioned in the vertical direction. Water surface W. Float at L. In order to prevent the connecting member 14 from being submerged, a floater made of foamed polystyrene or FRP (Fiber Reinforced Plastics), which can obtain a large buoyancy, or a rubber injecting air is attached as a buoyant body, and both ends are sealed watertight. Then, the connecting member 14 itself may have a function of a floater, or a combination thereof.

  Next, the worker will see the water surface W.D. The number of connecting members 14 required to install the scaffold 10 on a floating body such as a pontoon that floats on L. In a state of being floated on L, the ship is towed to a location below the upper structure 12 on which the scaffold 10 is installed. And while the operator is on the floating body, both ends of the connecting member 14 are extended in accordance with the distance between the two adjacent steel pipe piles 13, 13, and the sheath pipe members 19, 19 at both ends are the outer peripheral surfaces of the steel pipe pile 13, respectively. The plurality of adjusted connecting members 14 adjusted to the length located on the outside are connected to the water surface W.D. Arranged in a row between adjacent piles of a plurality of steel pipe piles 13 while floating on L.

  Thereafter, the flanges 19a and 20a of the pair of sheath tube members 19 and 19 and the sheath tube member 19 and the sheath tube forming member 20 are joined with the steel tube pile 13 interposed therebetween, and between the outer peripheral surfaces of the steel tube pile 13 A cylindrical sheath tube having a gap in between and containing the steel pipe pile 13 is formed (see FIG. 2). After the formation of the sheath tube, the water surface W.D. The floater is removed from the connecting member 14 floated on L, the sheath pipe is aligned with the steel pipe pile 13, and the water surface W.V. L to water surface The connecting member 14 is disposed at a predetermined position below the water surface of the steel pipe pile 13.

  At this time, the sheath pipe moving on the outer surface of the steel pipe pile 13 has a gap with the outer peripheral surface. The portion provided with the heavy anticorrosion coating a below L can be moved without contacting the heavy anticorrosion coating a, and the heavy anticorrosion coating a which is easily damaged is not damaged. That is, when a steel structure is adopted for the legs of the water structure part 11, the splash zone is subjected to heavy anti-corrosion treatment, and the lining (surface coating method) is made of an organic material often used for this heavy anti-corrosion treatment. ) Is easily damaged by external force, so if some work is done, such as attaching a sheath tube to the heavy corrosion prevention treatment range, repair work for heavy corrosion treatment is required, but this repair work is not required. .

As described above, the connecting member 14 formed to be freely stretchable in the length direction corresponding to the distance between the steel pipe piles 13 arranged is formed on the water surface W.P. After being carried to the scaffolding place while floating on L, L is detachably attached to the steel pipe pile 13 by operation from above.
In addition, the reinforcement member etc. which connect between the steel pipe piles 13 are already attached to the scaffold installation place, and when this reinforcement member etc. has a function similar to the connection member 14, the connection member 14 is arrange | positioned. Without using, an existing reinforcing member or the like is used.

  Next, the worker on the floating body keeps the connecting member 14 at a predetermined position below the water surface of the steel pipe pile 13 while maintaining the water surface W.D. The upper end of the long bolt 22a exposed above L is rotated, for example, counterclockwise to raise the long bolt 22a. As the long bolt 22a rises, the wedge-shaped member 21 is driven between the steel pipe pile 13 and the sheath tube member 19 from the lower end of the sheath tube member 19, and the joined sheath tube member 19 and the sheath tube forming member 20 (or a pair of members) An annular sheath pipe made of the sheath pipe members 19, 19) is fixed to the steel pipe pile 13 (see FIG. 3A).

FIG. 6 shows a state in which the connecting member is fixed to the steel pipe pile under the water surface, (a) is an explanatory view of the connecting member as viewed from the side, and (b) is an explanatory view of the connecting member as viewed from above. . As shown in FIG. 6, when the sheath member 19, that is, the sheath tube is fixed to the steel pipe pile 13 by the wedge-shaped member 21 (see (a)), the connecting member 14 moves between the adjacent steel pipe piles 13. The steel pipe pile 13 is fixed and held at a predetermined position below the water surface so as to be connected (see (a) and (b)).
Next, the scaffold support member 15 is attached to the connecting member 14 fixedly held at a predetermined position below the water surface of the steel pipe pile 13.

  7A and 7B show a method for attaching the scaffold support member to the connecting member, wherein FIG. 7A is an explanatory view of the scaffold support member carried to the installation location, and FIG. 7B is a diagram in which the fixing base of the scaffold support member is fixed to the connection member. It is explanatory drawing of the state. As shown in FIG. 7, the scaffold support member 15 is placed on a floating body P such as a pontoon, for example, and is transported to a place where the scaffold 10 is installed where the connecting member 14 is fixedly held at a predetermined position below the surface of the steel pipe pile 13. (See (a)).

  An operator W riding on the floating body P moves the scaffolding support member 15 carried to the place where the scaffolding 10 is installed to the surface W. L, the fixed base 23 is locked to the connecting member 14 installed at a predetermined position below the water surface of the steel pipe pile 13, and the upper end portions 24 b of both support members 24, 24 are connected to the water surface W.W. The scaffold support member 15 is attached to the connecting member 14 in a state exposed above L. Thereafter, similarly, as many scaffold support members 15 as necessary for installing the scaffold 10 are attached to the connecting member 14 (see (b)).

  8A and 8B show a method of fixing the fixing base of the scaffold support member to the connecting member. FIG. 8A is an explanatory view showing a state in which the fixing base is positioned on the connecting member, and FIG. 8B is an illustration of fixing the fixing base to the connecting member. It is explanatory drawing of the state. As shown in FIG. 8, when the scaffold support member 15 is fixed to the connecting member 14, two workers W individually riding on the floating body P are respectively connected to the upper end portions of the pair of column members 24, 24. 24b, the scaffold support member 15 is attached to the water surface W.D. S is lowered, and both the support members 24, 24 are substantially parallel to each other in the vertical direction so that the fixed base portion 23 is in an open state and is positioned above the connecting member 14 (see (a)).

  Each worker W having the vicinity of the upper end portion 24b remains on the floating body P, that is, the water surface W.V. From above L, the strut member 24 is operated so that each of the pair of strut members 24, 24 is separated from each other, so that both strut members 24, 24 have a V shape with the fixed base 23 as the bottom. As a result, the fixed base 23 positioned outside the outer peripheral surface of the connecting member 14 in the open state is closed, and the fixed base 23 is in close contact with the outer peripheral surface so as to cover most of the outer peripheral surface of the connecting member 14. (See (b)).

Next, the scaffold forming member 16 is attached to a plurality of scaffold supporting members 15 (see FIG. 7B) attached to the connecting member 14 installed at a predetermined position below the water surface, thereby forming a scaffold floor.
9A and 9B show a method of forming a scaffold floor, wherein FIG. 9A is an explanatory diagram of a state where a scaffold beam is installed, and FIG. 9B is an explanatory diagram of a state where a scaffold floor is installed. As shown in FIG. 9, after all the scaffold support members 15 necessary for installing the scaffold 10 are attached to the connecting member 14, the worker W remains on the floating body P, that is, the water surface W.V. L from above, the water surface W. The beam member 16a is stretched over the upper end portion 24b exposed above L, and each upper end portion 24b and the beam member 16a are detachably mounted (see (a)).

  By attaching the upper end portion 24b of each support member 24 and the beam member 16a, the support members 24 and 24 of each scaffold support member 15 are held in a V shape and support the beam member 16a. The beam members 16a are attached to all the scaffold support members 15 in an interconnected state, and the plurality of beam members 16a supported by the plurality of scaffold support members 15 are connected to the water surface W.D. After being juxtaposed above L, a floor member 16b serving as a scaffold floor is detachably mounted on the beam member 16a (see (b)).

As described above, the scaffold support member 15 is formed on the water surface W.V. by the above-described scaffold construction method. After being carried to the scaffolding place while floating on L, L is detachably attached to the connecting member 14 by an operation from above, and the water surface W.I. Projecting in the L direction, and using this scaffold support member 15, the scaffold 10 is L can be supported above. Further, the water surface W.V. The scaffold forming member 16 forming the scaffold 10, which has been carried to the scaffold installation place where the scaffold 10 is installed in a state of being floated on L, is formed on the water surface W.P. By connecting the two steel pipe piles 13 and 13 of the plurality of steel pipe piles 13 by an operation from above L, the connecting member 14 is fixed and held at a predetermined position below the water surface of the steel pipe piles 13, that is, the connecting member. 14 is supported by a scaffold support member 15 mounted on the base plate 14 and fixedly disposed at the place where the scaffold is installed. L can be installed above L.
(Second embodiment)

Then, the scaffold structure of the water body structure which concerns on 2nd embodiment of this invention is demonstrated.
In the scaffold structure of the water structure according to the second embodiment, instead of forming the scaffold 10 by assembling the scaffold forming member 16 composed of the beam member 16a and the floor member 16b at the installation site where the scaffold 10 is installed. The scaffold 30 is formed using a scaffold unit manufactured in advance. Other configurations and operations are the same as the scaffold structure of the water structure according to the first embodiment.
FIG. 10 shows a method of forming a scaffold using the scaffold unit in the scaffold structure of the water structure according to the second embodiment of the present invention, (a) is an explanatory diagram of the scaffold unit carried to the installation location, (B) is explanatory drawing of the state which mounted | wore the connection member through the scaffold support member with the scaffold unit.

  As shown in FIG. 10, when the scaffold 30 is formed by using a scaffold unit manufactured in advance, first, a rectangular plate-shaped scaffold unit 31 having a scaffold floor is formed in advance, and the scaffold unit 31 has a large size. A water surface W.F. While floating on L, a necessary number of scaffolding support members 15 are placed and towed to the installation site where the scaffolding 30 is installed (see (a)). In addition to attaching a floater made of foamed polystyrene or the like, the scaffold unit 31 has a function of a floater in the scaffold unit 31 itself, or is configured by combining these, so that the water surface W. You may make it float on L.

Next, at the installation site where the scaffold 30 is installed, the worker W riding on the scaffold unit 31 moves the scaffold support member 15 to the water surface W.P. The scaffold unit is sinked below L, the fixed base 23 is locked to the connecting member 14 installed at a predetermined position below the surface of the steel pipe pile 13, and the scaffold support member 15 is attached to the connecting member 14 (see (b)). The scaffolding unit 31 is fixed (supported) to the connecting member 14 by the scaffolding support member 15 carried on 31.
Note that the connecting member 14 has at least the scaffold support member 15 from the scaffold unit 31 towed to the site where the scaffold 30 is installed. Before sinking downward, the steel pipe pile 13 is attached and fixed as described above.

  The work contents and work procedure for attaching the scaffold support member 15 to the connecting member 14 by the worker W riding on the scaffold unit 31 are the same as those described above for the floating body P of the scaffold structure of the water structure according to the first embodiment. The work contents and work procedures of the attachment method of the scaffold support member to the connection member, which is carried out by the worker W who rides, attaches the scaffold support member 15 carried to the place where the scaffold 10 is installed to the connection member 14 (see FIGS. 7 and 8). ).

Thus, by scaffolding the scaffold floor in advance (unitized) and towing to the installation site where the scaffold 30 is installed, by using the scaffold support member 15 at the installation site and mounting and fixing to the connecting member 14, Compared to assembling the scaffold forming member 16 composed of the beam member 16a and the floor member 16b at the site where the scaffold is installed, the work process for constructing the scaffold can be greatly shortened, and as a result, the work time required for constructing the scaffold is greatly increased. Can be shortened.
(Third embodiment)

Then, the scaffold structure of the water body structure which concerns on 3rd embodiment of this invention is demonstrated.
In the scaffold structure for a water structure according to the third embodiment, the scaffold 35 is provided with a scaffold forming unit 36 that is one step lower than the scaffold 10 in addition to the scaffold 10 formed by the scaffold forming member 16. It is formed in steps. Other configurations and operations are the same as the scaffold structure of the water structure according to the first embodiment.
FIG. 11: shows the method of forming a scaffold using the scaffold formation unit in the scaffold structure of the water body structure which concerns on 3rd embodiment of this invention, (a) is plane | planar explanatory drawing of a scaffold, (b) is ( It is explanatory drawing by the BB cross section of a).

  As shown in FIG. L has a scaffold forming unit 36 installed one step lower than the scaffold 10, and the scaffold forming unit 36 is the lowest part of the upper structure 12 provided in the water body structure 11, for example, the pier beam part 12 a In the portion immediately below, the floor members 16b and 16b adjacent to each other of the scaffold 10 are arranged so as to be connected at a position lowered by one step.

  The scaffold forming unit 36 includes a beam member 36a attached to both support members 24 and 24, and a floor member 36b attached to the beam member 36a and serving as a scaffold floor, and two pieces arranged in a V shape. It is formed in a rectangular shape having a sufficient shape and width as a beam supported by the support member 24 and as a floor surface on which an operator works and passes. The beam member 36a is made of, for example, a single pipe pipe made of steel pipe, and is detachably attached to the column member 24 by a clamping means (not shown) such as a single pipe clamp. The floor member 36b is made of, for example, expanded metal. It is used and is detachably attached to the beam member 36a by an attachment member (not shown).

The beam member 36a serves as a work location, for example, a column member 24 that can secure a sufficient height required for working and passing with the floor member 36b below the pier beam portion 12a. The column member 24 is mounted at the center position.
Thereby, the space below the pier part 12a which is the upper structure 12 with which the water body structure 11 is provided, for example can fully be ensured. That is, generally, when an operator's hand easily reaches the lower surface of the floor slab 12b in order to repair the lower surface of the pier floor slab 12b, the base surface of the scaffold 35, that is, the scaffold floor surface formed by the floor member 16b. However, in this case, the distance between the lower surface of the pier beam portion 12a and the scaffold floor surface approaches, and the space in the height direction becomes very narrow, and workability on the lower surface of the pier beam portion 12a is reduced. Traffic becomes difficult.

  However, a beam member (single pipe pipe) is formed at a pair of two positions on both sides of the jetty beam portion 12a so as to avoid the lower side of the jetty beam portion 12a by the scaffold support member 15 including the two support members 24 arranged in a V shape. By supporting 36a, compared with the case where the support member 24 is supported by one scaffold support member extending in the vertical direction from the connecting member 14, the span of the beam member 16a is shortened to maintain strength. The required cross-sectional performance can be reduced, and the assembly workability can be improved and the material cost can be reduced.

Further, since the scaffold support member 15 that supports the scaffold 35 is composed of the two support members 24, 24 arranged in a V shape, the scaffold formation unit 36 and the scaffold 10 below the pier 12a are used to form the pier beam. A scaffold 35 having a two-stage structure in which the height (base height) of the scaffold floor is changed directly below the section 12a and directly below the jetty floor slab 12b can be constructed (see (b)). In addition to being able to set the height at an arbitrary position in the column member 24 corresponding to the position of the pier beam portion 12a, the height of the beam member 16a is also an arbitrary position not affected by the position of the pier beam portion 12a. Can be set to For this reason, since the height of the scaffold floor surface which becomes work height can be set to arbitrary height, the workability | operativity at the time of inspection or repair etc. of the upper structure 12 of the water body structures 11, such as a pier, improves. To do.
(Fourth embodiment)

Then, the scaffold structure of the water body structure which concerns on 4th embodiment of this invention is demonstrated.
In the scaffold structure of the water body structure according to the fourth embodiment, using the draft adjustment scaffold unit 41 that can directly attach and fix the scaffold 40 to the connecting member 14 without using the scaffold support member 15. Forming. Other configurations and operations are the same as the scaffold structure of the water structure according to the first embodiment.
FIG. 12 is a perspective explanatory view of the draft adjustment scaffold unit in the scaffold structure of the water structure according to the fourth embodiment of the present invention. FIG. 13 shows a method of forming a scaffold using the draft adjustment scaffold unit of FIG. 12, (a) is an explanatory plan view of the scaffold, and (b) is an explanatory view seen from the B direction of (a).

As shown in FIG. 12, the draft adjustment scaffold unit 41 is made of, for example, steel, FRP, or the like, and stores a liquid such as water therein and can inject or discharge the liquid, for example. A groove-shaped recess 41a having a shape and a size capable of fitting the connecting member 14 is formed at the bottom, connecting the opposing sides and opening on the bottom surface side.
Therefore, the draft adjustment scaffold unit 41 increases or decreases the amount of liquid inside the container, thereby increasing the water surface W.D. Since the draft at the time of floating to L can be adjusted, the amount of liquid inside the container is reduced to make the draft shallower and the water surface W.V. L. On the other hand, the amount of liquid inside the container is increased to deepen the draft and L can be sunk downward.

Therefore, the draft adjustment scaffold unit 41 has the water surface W.V. with a small amount of liquid inside the container. Can float to L and can be towed to the place where the scaffold is installed, and when it reaches the place where the scaffold is installed, it is positioned above the connecting member 14 to increase the amount of liquid inside the container. The connecting member 14 can be fitted into the recess 41a by sinking below L.
The connecting member 14 has at least the draft adjustment scaffold unit 41 towed to the installation site of the scaffold 40 on the water surface W.D. Before being submerged below L, as described above, the steel pipe pile 13 is attached and fixed.

By fitting the connecting member 14 into the recess 41a, the draft adjustment scaffold unit 41 is connected to the water surface W. L is exposed above and can be held in a state of being locked to a connecting member 14 installed at a predetermined position below the water surface of the steel pipe pile 13. In this state, the draft adjustment scaffold units 41 are connected to each other, and the scaffold 40 is formed using the upper surface of the draft adjustment scaffold unit 41 as a scaffold floor.
Since the draft adjustment scaffold unit 41 locked to the connecting member 14 can be floated by reducing the amount of liquid inside the container, the draft adjusting scaffold unit 41 is pulled out of the recess 41a and the draft adjusting scaffold unit 41 is removed from the connecting member 14. 41 can be detached.

In this way, the draft adjustment scaffold unit 41 is composed of a container that can store liquid inside and can increase or decrease the amount of liquid inside, and is formed on the container upper surface portion that becomes the scaffold 40 and the connecting member formed on the container bottom surface portion. 14 has a recess (locking portion) 41a that can be detachably attached to the water surface W. It can be made to sink below L, and can be held in the state where it was locked to connecting member 14 by crevice 41a.
(Fifth embodiment)

Subsequently, a scaffold structure for a water structure according to a fifth embodiment of the present invention will be described.
In the scaffold structure of the water structure according to the fifth embodiment, the beam member 16a is supported by using the floating beam receiving member 46 locked to the connecting member 14 instead of the scaffold support member 15. It is formed by doing. Other configurations and operations are the same as the scaffold structure of the water structure according to the first embodiment.
FIG. 14: shows the method of forming a scaffold using the floating beam receiving member in the scaffold structure of the water body structure which concerns on 5th embodiment of this invention, (a) is plane explanatory drawing of a scaffold, (b) It is explanatory drawing by the BB cross section of (a).

As shown in FIG. 14, the floating beam receiving member 46 has at least a length that can be spanned between two adjacent steel pipe piles 13 and 13, and is mounted with a floor member 16 b such as an expanded metal, for example. Water surface W. It is formed in the shape of a girder having a floating structure that can float on L, and is locked to the connecting member 14 using, for example, rope-shaped locking means 47.
When the floating beam receiving member 46 is towed to the scaffold installation location and arrives at the scaffold installation location, the locking means 47 is used to connect the floating beam receiving member 46 and the connecting member 14, and While floating on L, it is positioned in a direction orthogonal to the connecting member 14 and locked to the connecting member 14.

The connecting member 14 is attached and fixed to the steel pipe pile 13 as described above before at least the floating beam receiving member 46 towed to the installation site of the scaffold 45 is connected to the connecting member 14.
Water surface After the necessary number of floating beam receiving members 46 which are locked to the connecting member 14 while being floated on L are installed, the floating beam receiving members 46 are formed on the upper surface of all the floating beam receiving members 46. The beam member 16a is stretched in a direction orthogonal to the floor, and a floor member 16b serving as a scaffolding floor is mounted on the spanned beam member 16a. Thereby, the scaffold 45 is formed by using the upper surface of the floor member 16b as the scaffold floor.

As shown in each embodiment described above, the water structure W is supported by the scaffold support member 15 attached to the connecting member 14 fixedly held by the steel pipe pile 13 by the scaffold structure of the water structure according to the present invention. . L. The scaffold 10 having a scaffold floor located above L is placed on the water surface W.W while the worker W is on the floating body P. The work from above L can be installed below the upper structure 12 of the water structure 11.
And it is a rod-like member including a cylindrical body that can be expanded and contracted in the axial direction of the member, is detachably mounted between the existing steel pipe piles 13, connects between the steel pipe piles 13 of the water body structure 11, and moves along at least the steel pipe pile 13. The connecting member 14 mounted so as not to hold holds the load of the scaffold constructed under the superstructure, and suppresses the shaking of the scaffold constructed with the floating body under the superstructure.

For this reason, since the scaffold 10 can be constructed by using the connecting member 14 fixedly held by the steel pipe pile 13 as a support structure (foundation), the suspension that is essential in a scaffold suspended using a conventional suspension chain is used. Not only can the chain itself be eliminated, but also the process of attaching the chain to the beam side surface of the superstructure (for example, the pier superstructure) can be omitted.
Therefore, by eliminating the suspension chain, the work space obtained by constructing the scaffolding is not blocked by the chain, so the work space can be freely moved and a wide work space can be secured, and the efficiency of inspection and repair work As a result, work costs can be reduced and work processes can be shortened. Also, by eliminating the suspension chain, the installation work of the suspension chain that takes time and labor can be eliminated, so that it is possible to reduce the work cost and the construction period for constructing the scaffold.

  In addition, with the elimination of the suspension chain, post-treatment of the attachment hardware to which the suspension chain is attached, that is, removal after the scaffold is removed, repair of the attachment surface, and the like becomes unnecessary. Since there is no need to repair the mounting surface itself, it is possible to eliminate the possibility of repair deterioration, for example, the possibility of causing concrete deterioration in the future, such as the deterioration of concrete due to salt damage from the mounting bracket rusting.

When the connecting member 14 is disposed in water, the wedge-shaped member 21 that fixes and holds the connecting member 14 to the steel pipe pile 13 in the water has a water surface W.P. L can be driven between the steel pipe pile 13 and the sheath pipe by rotating the long bolt 22a from above, and the attachment of the scaffold support member 15 to the connecting member 14 is performed on the water surface W.P. L can be performed by operating the support member 24 from above, and any work can be performed by the worker W, for example, the water surface W.L. Since it can be easily operated remotely from the water surface while riding on the floating body P floating on L, for example, underwater work by a diver is not required, and the work cost can be reduced.
Furthermore, by manufacturing the scaffold in advance (unitized), towing the site, and using the scaffold support member to connect and fix it to the support member, the process for constructing the scaffold can be greatly shortened. .

  According to the present invention, by eliminating the suspension chain, the work space obtained by constructing the scaffold is not blocked by the chain, so that free movement of the work space and a wide work space can be secured, Eliminating the suspension chain eliminates the time-consuming task of installing the suspension chain, so the upper structure located above the water surface is used when checking or repairing the upper structure of the water structure such as a pier. It is most suitable for scaffold construction method and scaffold structure of water structure installed in

10, 30, 35, 40, 45 Scaffolding 11 Water body structure 12 Upper structure 12a Pier beam part 12b Pier floor slab 13 Steel pipe pile 14 Connection member 15 Scaffolding support member 16, 36 Scaffolding member 16a Beam member 16b Floor member 17 Outside Pipe 18 Inner pipe 19 Sheath pipe member 19a, 20a Flange 20 Sheath pipe forming member 21 Wedge-like member 22a Long bolt 22b Nut 22c Guide pipe 23 Fixed base 23a Base piece 23b Hinge 23c Rubber member 23d Strut mounting member 24 Strut member 24a Projecting lower end Part 24b upper end part 31 scaffolding unit 36 scaffolding forming unit 36a beam member 36b floor member 41 draft adjustment scaffolding unit 41a recess 46 floating beam receiving member 47 locking means P floating body W worker W. L Water surface a Heavy protective coating

Claims (3)

A water structure comprising an upper structure supported by a plurality of legs projecting above the water surface from the water and positioned above the water surface, wherein a scaffold located below the upper structure is installed. In the scaffold construction method,
In order to connect the legs of the water body structure and not move along at least the legs, a connecting member attached to the underwater position excluding the part with the heavy anti-corrosion coating below the water surface is under the superstructure. Hold the load of the scaffolding to build ,
The connecting member is freely rod member telescopic members axis, scaffold construction method of water structure, wherein detachable der Rukoto between existing legs. 2. The scaffold construction method for a water body structure according to claim 1, wherein the connecting member suppresses the shaking of the scaffold constructed by a floating body under the superstructure. In a scaffold structure in which a scaffold located below the upper structure is installed in a water structure having an upper structure supported by a plurality of legs protruding above the water surface from the water and located above the water surface ,
The load of the scaffold is transmitted to a connecting member disposed at an underwater position excluding a portion provided with a heavy anticorrosive coating below the water surface so as to connect between the plurality of legs and not move along at least the legs. Providing a scaffolding support member,
The scaffold support member includes a fixed base consisting openably formed support piece, with a strut member for opening and closing operations of the attached said support piece to the base piece, removably mounted to said connecting member by closing operation of said strut members, scaffold said support piece is characterized in that a state in which the fixing bases and closing operation sealed engagement and tightly fixed to the connecting member.

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