JP4925092B2 - Temporary scaffolding for coastal construction - Google Patents

Description

    In particular, the present invention relates to a mobile temporary construction scaffold for performing various operations on the water side in the vicinity of a floating structure constructed on a river or seaside. In the present specification, the “water structure” is a general term for a cut-off work, a bridge, and the like. “Cut-off work” includes temporary cut-off works such as steel sheet piles and steel pipe sheet piles, as well as permanent breakwaters and dikes.

  In river renovation work and seaside landfill work, steel sheet piles and other deadlines are built up to the foundation ground to close the waterside and land and partition the waterways. After the deadline, for example, ground improvement or dredging work is performed on the water bottom or seabed near the deadline. In such a case, if the water depth is shallow or the water channel is narrow, it is impossible to introduce a large dedicated heavy machinery ship. Therefore, conventionally, as illustrated in FIG. 7, a work stage is constructed which becomes a temporary scaffold 102 on a plurality of temporary pillars 101 which are built on the bottom of the water adjacent to the steel sheet pile 1 and reinforced by the braces 100. Then, the construction heavy machine 103, the boring machine 104, and the like are installed on the work stage, and the intended construction is performed under the water bottom. As this related technique, Patent Document 1 discloses a construction method for a temporary jetty in which main frames and steel piles are alternately assembled and extended offshore.

As another conventional temporary scaffold, as shown in FIG. 8, a mooring type float 106 ( floating body) is floated on the water surface, and one end side thereof is moored to the steel sheet pile 1 side via a rope or the like, and the other end Some are moored to the bottom of the water via anchors. On the float 106 , there are some which are installed with heavy machinery or equipment as described above and work toward the bottom of the water with them. In this float type temporary scaffolding, the anchor can be lifted and then moved to the adjacent work area by rope towing from the land side. In addition, as this related technique, there is a working device for a jetty structure shown in Patent Document 2. The main part of the apparatus is provided with a stage that can be raised and lowered at the upper part of the floating body, and is connected to a support pile of a pier via a gripper.

JP 2005-83179 A Japanese Patent Laid-Open No. 10-325126

  In the temporary scaffold 102 shown in FIG. 7, after completing the construction in the assembled area, as a procedure for moving to the adjacent work area, removal of heavy machinery and equipment, dismantling and removal of the scaffold, reconstruction, re-loading, etc. Therefore, the work efficiency is poor. In addition, if the construction method shown by patent document 1 is applied, it is possible to perform continuous construction, constructing a temporary scaffold in the adjacent work area, but also in that case, it takes time and labor for the removal work.

The temporary scaffold shown in FIG. 8 requires a large area to obtain buoyancy. For example, when floating on a river, the width of the river is occupied by the float 106, and therefore, the channel obstruction of other ships that navigate the river. There is a problem that when a heavy machine or the like moves on the float, it tends to be inclined due to uneven distribution of the load. The device disclosed in Patent Document 2 is specialized for work under the temporary pier, and cannot be applied to a temporary scaffold in the vicinity of a floating structure constructed on the river or the sea that is the subject of the present invention.

  An object of the present invention is to solve the above-described problems. For example, it is an object of the present invention to provide a temporary scaffold for coastal construction that does not occupy a large river width and is easy to construct and good in movement.

In order to achieve the above object, the temporary scaffold for the waterside construction of the present invention is a mobile temporary construction for the waterside construction for performing various operations on the water side in the vicinity of the floating structure which is a steel sheet pile or a dike constructed on the river or seaside. A scaffold, which is a scaffold, placed in a floating state on the water surface near the water structure , and a movement supported by the water structure and arranged to be movable in the horizontal direction along the water structure and body, one end is vertically movably connected to and supported relative to the support provided in the barge, the work stage and the other end is swingably connected to and supported through the hinge portion against the moving body And the carriage, the movable body, and the work stage can be moved integrally along the water structure in a state in which equipment and the like are installed on the work stage.

   For example, when the above-mentioned scaffold for waterside construction is a cut-off work such as a steel sheet pile or steel pipe sheet pile, the soil investigation, ground improvement, dredging work, etc. in the vicinity of the cut-off work is performed in accordance with the cut-off work. This is effective when performed continuously.

In the present invention described above, it is preferable to be embodied as follows . That is, a hydraulic cylinder over the previous SL support for lifting adjust one end of the work stage having at least a tilt sensor disposed on the working stage, the measurement value of the inclination sensor is so instructs a substantially horizontal at all times Further, the hydraulic cylinder is controlled to extend and contract (claim 2 ).

  In the invention of claim 1, for example, it is easy to cope with shallow waters by selecting a trolley, and it is not necessary to occupy a large river width in the case of rivers, etc. It is efficient and can save labor for dismantling and reassembling equipment such as heavy equipment and equipment for construction. As a result, the temporary scaffold for coastal construction according to the present invention, for example, when the floating structure is a cut-off work such as a steel sheet pile or a steel pipe sheet pile, conducts soil investigation, ground improvement, dredging work, etc. in the vicinity of the cut-off work. Make it possible to construct continuously and efficiently. When the floating structure is a bridge or the like, the work stage is used so that the bridge strength inspection, repair work, or painter can be continuously and efficiently constructed.

The inventions of claim 2, in addition to the operation and effect of claim 1, for example, the tilt and sway of the work stage due like tidal difference and wave and enables prevented, always optimal horizontal state working stage To be able to maintain.

(First Embodiment) FIGS. 1 to 4 show a first embodiment of the present invention, and FIG. 1 is a perspective view including a partially enlarged view schematically showing a ground investigation state by a boring machine, FIG. sectional view showing a state of ground improvement based on the ground survey results schematically, the Figure 3 is a schematic side view of a arrow direction in FIG. 2, FIG. 4 (a), (b) the work by tidal difference It is a schematic cross section which shows the state which is performing the horizontal adjustment of a stage.

  1-4, the code | symbol 1 is a steel sheet pile which is a continuous wall, and the code | symbol 2 is a temporary scaffold for the waterside construction to which this invention is applied. A large number of steel sheet piles 1 are built up to the ground foundation side and arranged in a line along the boundary between the land and the river. The temporary scaffold 2 is provided on the river side so as to be movable along the arrangement direction of the steel sheet piles 1.

  That is, the temporary scaffold 2 is supported in a state where the temporary scaffolding 2 is suspended on the water surface of the river along the steel sheet piles 1 and the steel sheet piles 1 and is arranged in the arrangement direction of the steel sheet piles 1. That is, the movable body 4 that can move along the horizontal direction, the lower support 5 that protrudes from the substantially central portion of the carriage 3, and the upper support 6 that is fitted to the lower support 5 so as to be movable up and down, Inside the upper and lower supports 5, 6, an elevating hydraulic cylinder 7 interposed between them and a work stage 8 connected and supported between the upper support 6 and the movable body 4 are provided. Yes.

  Of these, the trolley 3 has vertical and horizontal dimensions that can be conveyed to a construction site by a large truck or the like, and a shallow draft towed trolley according to the water depth of the river is used. On the other hand, the moving body 4 is, for example, a traveling type sheet pile press-in device having a structure similar to a trade name Silent Piler manufactured by Giken. This device is characterized by a saddle portion 10 supported in a state of straddling the upper edge of the steel sheet pile 1, and projecting on both lower sides of the saddle portion 10 to sandwich both side portions of the steel sheet pile 1 as shown in FIG. And a plurality of fixing clamps 11 for firmly restraining the saddle portion 10 on the steel sheet pile 1 and a forward / backward clamp (not shown) that is disposed so as to be able to protrude and retract on both front sides of the saddle portion 10 and sandwiches both sides of the steel sheet pile 1. And. The apparatus (moving body 4) is interlocked with the movement of the carriage 3 in a state in which one side of the saddle portion 10 is swingably connected to the other end of the work stage 8 via the hinge portion 9. Thus, the fixing clamp 11 is moved away from the both sides, and is moved in the form of a worm by driving and controlling the forward / rearward movement clamp (using a reaction force on the steel sheet pile 1). In this example, one side of the steel sheet pile 1 is a land portion. On the land portion side, for example, a hydraulic device 12 movable with the moving body 4 is disposed, and driving power is supplied to the moving body 4 via a hydraulic hose 13 or the like.

  The work stage 8 has one end connected and supported to the upper support 6 and the other end connected to and supported by the movable body 4 via a hinge portion 9 so as to be swingable. In addition, the work stage 8 receives a tilt sensor (not shown) disposed at an appropriate position on the upper side and an output signal of the tilt sensor, and indicates that the value of the tilt sensor is always horizontal (a predetermined range of horizontality). In this way, it has feedback control means (not shown) for controlling the expansion and contraction of the hydraulic cylinder 7. In the above scaffold structure, for example, as shown in FIG. 4 (a), the hydraulic cylinder 7 is reduced by the control means at high tide (HWL), as shown in FIG. 4 (b). At low tide (LWL), the hydraulic cylinder 7 extends, and as a result, the work stage 8 is always kept substantially horizontal and is supported between the upper support 6 and the movable body 4, thereby the difference in tide level Inadvertent tilting of the work stage 8 due to H can be prevented.

  The functions described above are not only a slow tide level difference such as tidal flow, but also the waves received when used along the sea, and the laying caused by other ships and boats navigating the vicinity of the carriage 3. As a result, the carriage 3 swings up and down, but the work stage 8 is maintained substantially horizontal by the expansion and contraction control of the hydraulic cylinder 7 even with respect to the temporary swing.

(Operation) In the temporary scaffold 2 described above, FIG. 1 shows a state where the boring machine 14 is disposed on the work stage 8 and the boring survey is conducted by penetrating the sampling pipe 15 toward the bottom of the ground. . The boring machine 14 can move along the longitudinal direction of the work stage 8 and can take samples at several points from the vicinity of the steel sheet pile 1 to the farthest position on the work stage 8. ing.

  Based on this sampling result, the formation characteristics near the steel sheet pile 1 are grasped, and the state of the formation to be improved and the depth distribution to be improved based on the state can be designed. 2 to 4, for example, the ground using the ground improvement heavy machine 16 installed on the work stage 8 of the same temporary scaffold 2 that moves following the temporary scaffold 2 as shown in FIGS. Improvement work is done.

  The heavy machine 16 includes, for example, a base machine 17 that can move along the longitudinal direction of the work stage 8, and a guide post 18 that stands vertically at the side edge of the work stage 8 at the tip of the base machine 17. The excavating casing 19 is arranged so as to be able to rotate and move up and down with respect to the guide post 18, and the improvement agent provided at the front end of the casing 19 and supplied through the casing for mixing and stirring to a predetermined depth below the ground. And an auger section 20.

  In addition, a supply pipe is provided in the casing 19, and the improving agent manufactured in the manufacturing plant 23 is supplied to the supply pipe via the swivel joint 21 and the grout pump 22. In the construction work, a soil cement column or the like is formed in the ground by stirring and mixing the ground to a predetermined depth while supplying and injecting the improving agent. When the ground improvement work is completed once in this way, the heavy machine is moved and positioned at the upper part of the next improvement range and the same work is performed, so that the position farthest from the sheet pile 1 on the stage 8 is reached. A series of soil cement columns will be created in several places.

In FIGS. 2 and 4, for convenience of explanation, the heavy machine 16 and the manufacturing plant 23 are installed in the same work stage 8 in a coexisting state. However, structurally, the manufacturing plant 23 may be installed on the carriage 1 or the manufacturing plant 23 is separated from the temporary scaffold 2 due to the buoyancy of the carriage 1, and particularly illustrated in FIG. As described above, it is desirable to install on a similar or similar carrier 3 to be subsequently towed by the carrier 3 and connect to the heavy machinery 16 side via a hose 24 or the like.

  Accordingly, in the above embodiment, for example, after the start of the construction of the steel sheet pile 1, the temporary scaffolding 2 can be subsequently carried in and assembled, and the manufacturing carrier for the improving agent can be subsequently introduced. Following the construction work of the steel sheet pile 1, it is possible to continuously perform geological surveys under the surface of the water near the sheet piles and ground improvement work based on the survey results, only at the final work end position The work efficiency can be drastically improved by simply dismantling and removing each.

(Second Mode) FIG. 5 shows an example in which the steel sheet pile 1 partitions a river into two right and left water channels. In this description, the same or similar members and parts as those in the first embodiment are denoted by the same reference numerals, and redundant description is omitted as much as possible. In FIG. 5, the left and right water channels sandwiching the steel sheet pile 1 are each provided with a base boat 3, and temporary scaffolds 2 are provided on both sides of the steel sheet pile 1 using each base boat 3 and the moving body 4. ing. Each temporary scaffold 2 utilizes the movable body 4 straddling the steel sheet pile 1 as a common movement and one-side support means, and each work stage 8 has the other end corresponding to both sides of the movable body 4 Each of them is connected and supported so as to be swingable through the joint portion 9 .

  FIG. 5 shows a state in which the boring machine 14 is mounted on each work stage 8 and the sampling pipe 15 penetrates into the water bottom ground, and the ground investigation is performed, but the same temporary scaffold 2 is followed. Of course, it is possible to improve the ground using heavy equipment mounted on each work stage 8. Although not shown, a hydraulic device or the like for applying driving power to the moving body 4 may be installed on either one of the work stages 8. In the above second embodiment, for example, soil investigation and ground improvement of the bottom soil in the vicinity of the steel sheet pile 1 in the water channel partitioned into two by the steel sheet pile 1 can be performed simultaneously and continuously.

(Third embodiment) FIG. 6 shows a configuration example applied to ground improvement in the vicinity of a bank. In this description as well, the same or similar members and places as those in the first embodiment are denoted by the same reference numerals, and redundant description is omitted as much as possible. In FIG. 6, a temporary rail 31 is laid along the lengthwise direction at the sea side edge portion at the top (upper wall) of the embankment 30, and the longitudinal direction of the railroad 31 is firmly restrained and supported on the rail 31. A movable body 32 that can move along the line is disposed, and the sea side portion of the movable body 32 is connected to the other end of the work stage 8 via a hinge portion 9.

  In FIG. 6, the heavy machinery 16 is mounted on the work stage 8 to improve the ground of the seabed near the embankment 30, but prior to this, boring is performed as necessary. Moreover, in each form example, the case where it applied to the ground improvement method of the bottom of the sea near the steel sheet pile 1 or the embankment 30 was shown. It is suitable as a temporary scaffold for the nearby dredging work. Furthermore, the temporary scaffold according to the present invention can be applied and expanded to repair work such as bridges and painters.

It is a model perspective view containing the partial expansion part which shows the temporary scaffold of a 1st form. It is the model longitudinal cross-sectional view which carried out the cross section of the temporary scaffold of a 1st form. It is a model side view in A arrow view of FIG. (A), (b) is sectional drawing which shows the horizontal adjustment of the work stage by a tidal difference. It is a model perspective view which shows the temporary scaffold of a 2nd form. It is a schematic cross section which shows the temporary scaffold of a 3rd form. It is a model perspective view which shows the conventional assembly-type temporary scaffold. It is a model perspective view which shows the conventional float type temporary scaffold.

1 ... Steel sheet pile (water structure)
2 ... Temporary scaffolding 3 ... Boat 4,32 ... Moving body 5,6 ... Support (5 is the lower support, 6 is the upper support)
DESCRIPTION OF SYMBOLS 7 ... Hydraulic cylinder 8 ... Work stage 9 ... Hinge part 11 ... Clamp for fixation 14 ... Boring machine 15 ... Pipe for sampling 16 ... Heavy machine for ground improvement 30 ... Embankment (water structure)

Claims (2)

A mobile scaffolding temporary scaffold for performing various operations on the water side in the vicinity of a floating structure that is a steel sheet pile or embankment built on a river or seaside,
A barge that is disposed on a floating state on water structure near above the water,
A movable body supported by the water structure and arranged to be movable in the horizontal direction along the water structure;
One end is vertically movably connected to and supported relative to the support provided in the barge, and a work stage which other end is swingably connected to and supported through the hinge portion against the moving body,
A temporary scaffold for waterside construction, wherein the carriage, the moving body, and the work stage can be moved integrally along the water structure in a state in which equipment or the like is installed on the work stage.   The hydraulic pressure cylinder includes at least a hydraulic cylinder that adjusts one end of the work stage relative to the support, and a tilt sensor disposed on the work stage, and the hydraulic pressure is set so that the measured value of the tilt sensor always indicates almost horizontal. The temporary scaffold for waterside construction according to claim 1, wherein the cylinder is extended and contracted.

Images