JP3082851B2 - Construction method of sound absorbing scaffold under viaduct - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a scaffolding / sound absorbing device (hereinafter referred to as "sound absorbing scaffold") which is laid in the air below a girder of an elevated bridge such as an elevated road or an elevated railway.

[0002]

2. Description of the Related Art Noise pollution in a viaduct is composed of noise from vehicles traveling on the viaduct and the reverberation of noise generated by vehicles traveling on the ground under the viaduct. Noise countermeasures on viaducts have been considered in the past, but secondary noise due to the reflection of ground noise due to viaducts has been dealt with by installing sound-absorbing plates using conventional methods. This conventional method will be briefly described below.

[0003] First, a work for assembling a dedicated scaffold under a girder of the viaduct and an accurate surveying / investigation work for the viaduct site are performed. Then, after careful planning, design, and drafting work based on this, the operation moves to a sound absorbing plate manufacturing work. It usually takes half a year to finish the work. Next,
Move to on-site construction. That is, drilling work for existing stiffeners and welding and mounting work for new stiffeners, and then mounting work for brackets, hanging materials, installing vertical beams, installing horizontal beams, installing sound absorbing panels (panels), and installing decorative panels After the work, the scaffolding is finally removed to complete the site construction. Usually, during this series of site works, large-scale vehicle regulation of vehicles traveling under the viaduct is performed.

[0004]

However, in the above-mentioned conventional method, there is a disadvantage that it takes a very long time before starting the on-site construction as described above. In addition, there is a disadvantage that traffic control must be performed for a long period of time after moving to the site construction. Furthermore,
Since the scaffold is removed after the completion of the on-site construction, it is necessary to reassemble the scaffold when performing repair work or the like in the future, which is disadvantageous in that it is extremely uneconomical.

[0005] Therefore, an object of the present invention is to provide an innovative construction method capable of solving various inconveniences of the conventional construction method.

[0006]

In order to solve the above-mentioned problems, a method of constructing a sound-absorbing scaffold according to the present invention comprises a method of repairing a viaduct.
Sound-absorbing panel for scaffolding installed under the viaduct for business use
A construction method of Le, a plurality of predetermined portions of the lower viaduct, Ru attached to and removable hanging member comprises a length adjustable component steps, the air in the lifting member lifts the acoustical panel working to hold the step of Ru lined laid a plurality of acoustical panels in a scaffold-like, wherein provided on the lower side of the viaduct
Fixing a fixing member in the vicinity of the suspending member;
Step of adjusting to align the height of the absorbing panels each other by a length-adjustable element of wood, by the fixing member
After deterministically fixing the absorbing panels in viaduct, the
A step of removing the hanging member, and wherein the formation Rukoto from various steps.

[0007] Preferably, the sound absorbing panel includes a structure in which a reinforcing bar is welded in a three-dimensional frame shape, and a sound absorbing member mounted in the structure. Preferably, the sound absorbing panel is transported to the viaduct with the sound absorbing member attached to the structure. Preferably, the sound absorbing panel is transported to the viaduct in a state where the sound absorbing member is not mounted on the structure, and is mounted there. Preferably, the sound absorbing panel further includes a sound absorbing plate above the structure. Preferably, the sound absorbing panel further includes a scaffold above the sound absorbing plate. Preferably, the sound absorbing panel has an engaging portion that engages with the suspending member for holding the sound absorbing panel in the air. Preferably, the sound absorbing panel includes a sound absorbing panel having a rectangular shape in plan view and a sound absorbing panel having a substantially trapezoidal shape in plan view. Preferably, the gap between the sound-absorbing panels, Ru covered by a given member.

[0008]

Embodiments of the present invention will be described below with reference to the drawings. First, an embodiment of a single structure of a sound absorbing panel which is an element constituting a sound absorbing scaffold, which is a main part of the present invention, will be described in detail with reference to FIGS. Referring to FIGS. 1 and 2, the sound absorbing panel 1 includes a three-dimensional welded reinforcing bar structure (fab deck (trade name)) 3 manufactured and sold by the present applicant, and a sound absorbing member 5 mounted inside the reinforcing bar structure. , And a rectangular plate-shaped sound absorbing plate 7 disposed on the reinforcing bar structure 3 and a floor plate (scaffold plate) 9 disposed on the sound absorbing plate 7. It is comprised including.

FIG. 3 is a perspective view of a reinforcing bar structure (fab deck) 3 of a single body. The reinforcing bar 3 is a mass-produced mass-produced steel bar which is automatically joined by an automatic welding machine at a factory. manner, the vertical and the main muscle that vertical line 11 which is arranged parallel to the transverse (Suji径: 8～11Fai, vertical line spacing: 150 mm approximately, height: ~125mm) and, arranged so as to cross the vertical line 11 distribution force muscle or lateral muscles first vertical which is
3 (muscle diameter: 8-11φ, horizontal muscle spacing: about 200mm),
A web bar 15 (bar diameter: about 6φ) formed by connecting and fixing the upper and lower vertical bars 11 and connecting and fixing the upper and lower vertical bars 11 in a triangular wave shape.

[0010] As shown in an enlarged scale in FIG.
, A large number of triangular prism-shaped spaces extending in the lateral direction are defined by a large number of web streaks, and in these spaces, for example, every other triangular prism-shaped sound absorbing member 5 and its two
A so-called punching plate 17 (for example, t = 1.5 mm aluminum plate, 15φ hole) bent in a V shape so as to cover the surface is mounted from the lateral direction. The mounting of the sound absorbing member 5 is not limited to the case where the sound absorbing member 5 is mounted during factory production, and the work can be performed on site. Further, the sound absorbing member 5 may be configured to fill all the spaces.

FIG. 5 shows a single unit. The punching plate 17 has a function of supporting the sound absorbing member 5 and a function of supporting the sound absorbing member 5.
The hole has a function of preventing deterioration of the sound and maintaining an aesthetic appearance, and a large number of holes (15φ) are for allowing free passage of sound waves. Each of the sound absorbing members 5, whose cross section is shown in FIG. 6 alone, has a water-repellent glass wool having a water-repellent glass cloth attached to the surface in contact with the punching plate 17 (for example,
32 kg / m ³ ). In addition, instead of this glass wool,
Rock wool or other members can be employed.

FIG. 7 shows a cross section of a single body, and the sound absorbing plate 7 disposed above the reinforcing bar structure 3 is made of general glass wool (for example, 32 kg / m ³ , 50 mm thick). The floor board (stepping board or scaffolding board) 9 above the sound absorbing board 7 is, for example, 200 m
It has a configuration in which deck plates of a predetermined length of m width are connected without gaps (FIG. 1). The above-described panel components are integrated (not necessarily rigidly connected) by the frame 19 or the like, whereby the sound absorbing panel 1 is formed. At approximately four corners on the upper surface of the sound absorbing panel, mounting plates 21 are provided. Are protruded (FIG. 8).

It should be noted that the terms such as length and width (girder beams) used in the description of the sound absorbing panel have no direct relation to the viaduct structure described later. It simply means the direction of reinforcement with web bars. Therefore, the girder direction of the viaduct and the girder direction of the sound-absorbing scaffold may or may not match.

Hereinafter, an example of an installation (operation) process of the above-described sound absorbing panel 1 will be described in detail. However, the installation process itself according to the present invention described here has a novel feature, and the sound absorbing panel is not absolutely limited to the above sound absorbing panel structure. In other words, the installation step is not limited to the above-described sound absorbing panel 1 in which the sound absorbing member 5 is packed in the reinforcing steel structure (fab deck) 3 according to the present invention. In terms of economy, weight, structure, etc., the advantage of the fab deck is absolutely essential. Packing a suitable sound absorbing member (Furthermore, make the span a length that is structurally acceptable, for example, 1 m.
A similar effect can also be obtained. Therefore, it can be said that such a configuration is also included in the present invention.

(1) First, as shown in FIGS. 9 and 10,
Using the aerial work vehicle 31, the worker P performs an operation of installing a master rope between the piers 35 of the viaduct 33 from the stage handrail. Worker P uses safety belt,
Care is taken to ensure that safe work is performed throughout the construction area. (2) As shown in FIG. 11, a chain hanging member 39 is clamped and fixed to a required portion on the lower surface of the I-shaped cross-section girder 37, and a scaffolding chain 41 is attached directly or via a round bar-like member. Further, a buckle 43 with a hook is attached.

(3) As shown in FIGS. 12 and 13, the work of lifting the sound absorbing panel 1 by a heavy machine and hooking the scaffolding chain 41 (tanbuckle 43 with hooks) on the sound absorbing panel 1 is performed on a large number of sound absorbing panels 1 one after another. The plurality of sound absorbing panels 1 are spatially held at a predetermined height so as to form a substantially horizontal surface (foot scene). On the outermost sound absorbing panel 1, a cover support 45 is set up in advance.

(4) As shown in FIG. 14, a fab stage scaffold 49 is attached to the outermost panel side surface via a scaffold bracket 47. Fab Stage Scaffold 49
Curing panel (commonly known as Asagao panel)
Assemble 51. Then, a disaster prevention sheet 53 is spread over the entire surface of the sound absorbing panel and the fab stage scaffold 49. (5) As shown in FIG. 15, the bracket mounting plate 55 is welded to a required portion below the side surface of the girder 37.

(6) As shown in FIG. 16, a channel-shaped bracket 57 is fixed to the bracket mounting plate 55 with bolts. (7) As shown in FIG. 17, the bracket 57 integrated with the spar 37 and the mounting plate 21 of the sound absorbing panel 1 are temporarily connected by bolts with the suspension channel 59 interposed therebetween. At this time, the bolts should be loosened. The operation in this step is performed for all the related sound absorbing panels 1.

(8) As shown in FIG. 18, the sound absorbing panel 1 to be used as a reference and its height (level) are determined, and the tambuckle 43 with hooks is set so that the sound absorbing panel 1 is at that height. To adjust. (9) As shown in FIG. 19, after the level adjustment of the sound absorbing panel 1 in the above step, the vertical bolts are fully tightened ((A)).
After performing the operation of putting out the sound absorbing panel 1 (adjustment between each other), the vertical and horizontal bolts are fully tightened ((I)), and the sound absorbing panel 1 is completely fixed to the spar 37 side. Thereafter, the fixing work of the other sound absorbing panels 1 is performed one after another with reference to the sound absorbing panel 1 which has been fixed.

(10) As shown in FIG. 20, after all the sound absorbing panels 1 are fixed, the decorative panel 61 is attached to the outer surface of the cover support 45. Then, the disaster prevention sheet is removed. (11) As shown in FIGS. 21 and 22, the curing panel 5
1. The disaster prevention sheet 53 and the fab stage scaffold 49 are removed and removed. FIG. 23 is a perspective view illustrating a state in which the upper portion of the viaduct is broken so that the inside can be seen, and the sound absorbing panel 1 is fixedly arranged (paved) in an orderly manner.

FIG. 24 illustrates a cross section of the entire viaduct in which the installation of the sound absorbing panel has been completed. In addition, it is conceivable to provide an eye plate also serving as a tread plate in the gap between the sound absorbing panels (scaffolds). In this case, it is preferable because it is possible to eliminate a feeling of discomfort at the joint and to prevent the object from falling. By the way, when the viaduct extends linearly, FIG.
As shown in FIG. 5, the sound absorbing panels are laid out in a rectangular shape (in plan view). However, there is naturally a case where the viaduct is bent, and examples of such a case are shown in FIG. 26 (small curvature) and FIG. 27 (large curvature).

Such a curved panel group (panel surface) can be formed even by laying a general rectangular sound-absorbing panel to be used for a straight portion of a viaduct. In that case, there is a possibility that the gap between the sound absorbing panels becomes very large. However, if the gap is filled with the eye plate, such a problem does not occur.
Alternatively, a substantially trapezoidal or fan-shaped (plan view) sound-absorbing panel dedicated to the curved portion of the viaduct can be separately designed and manufactured to cope with this.

Finally, the effects of the present embodiment can be summarized as follows in an itemized manner. (1) The reflection of noise on the ground due to an object installed in an existing space such as a viaduct can be significantly reduced, and the noise problem can be solved. (2) Since the structure is durable, it becomes a scaffold for repair work such as a permanent viaduct along with a sound absorbing effect against noise, so that scaffold erection is not required every time repair is performed.

(3) The mechanical characteristic of the sound absorbing panel is that it is a three-dimensional truss structure in which a reinforcing bar is welded and joined to a plate-like structure (panel) sandwiched between upper and lower outer plates or an upper outer plate, so that it is extremely lightweight. And rich in rigidity. (4) Since the structure of the sound absorbing panel is a pre-fabricated factory block, dedicated processing and assembly equipment can be used to shorten production, improve quality and accuracy, and reduce manufacturing costs. it can.

(5) The number of on-site installation points is greatly reduced by the blocking, so that the construction period can be shortened. (6) When attaching to an existing structure, it is possible to avoid drilling work and welding joining work for mounting holes in a bridge girder having a main structure. (7) When constructing the site, there is no need to perform a separate work such as forming a suspended scaffold by temporarily holding a flexible telescopic hanging tool to form a suspended scaffold.

(8) The use of heavy construction equipment can be kept for a short time, and traffic obstruction can be greatly reduced. (9) If a slight gap between the scaffold blocks can be tolerated,
Most may be covered by a rectangular standard size, or the gap may be closed with a blind board. The standard panel can be laid on the center of the scaffold laying area, and the measurement and on-site molding methods can be applied based on the center where the peripheral part is installed first. Either way,
Precise surveying before construction, the use of non-standard and irregular scaffold panels can be greatly reduced, and the economic effect is enormous.

(10) The three-dimensional reinforcing frame structure of the present embodiment is excellent in structural beauty, is exposed to the reinforcing bar, is in harmony with the surrounding environment, and does not impair the aesthetic appearance. (11) The three-dimensional reinforcing frame structure of the present embodiment is galvanized,
By painting, etc., it has excellent aesthetics and durability, and can greatly reduce repair opportunities and costs. (12) Precise surveying work at the installation site and a site casting process can be omitted.

As described above, it can be understood that a great many excellent effects can be expected in this embodiment.

[0029]

As described above, according to the present invention, various inconveniences of the above-mentioned conventional method can be satisfactorily solved, and it can greatly contribute to society in terms of work economy, safety, environmental protection and the like.

[Brief description of the drawings]

FIG. 1 is a cutaway perspective view of a main part of a sound absorbing panel alone.

2 (a) is a plan view, FIG. 2 (b) is a front view, and FIG. 2 (c) is a side view.

FIG. 3 is a perspective view of a reinforcing bar structure.

FIG. 4 is an enlarged view of a main part of the reinforcing bar structure, wherein FIG. 4 (a) is a side view and FIG. 4 (b) is a front view.

5A and 5B are diagrams showing a punching plate alone, wherein FIG. 5A is a diagram viewed from a longitudinal direction, and FIG. 5B is a diagram viewed from a side.

FIG. 6 is a view of the sound absorbing member viewed from a longitudinal direction.

FIG. 7 is a cross-sectional view of the sound absorbing plate.

8A and 8B are diagrams showing a mounting plate of the sound absorbing panel, wherein FIG. 8A is a diagram viewed from the longitudinal direction of the sound absorbing panel, and FIG. 8B is a diagram viewed from the side.

FIG. 9 is a diagram showing an installation operation state of the master rope.

FIG. 10 is a view showing the installation operation state of the master rope from another angle.

FIG. 11 is a view showing a state of attachment work of the scaffold chain.

FIG. 12 is a view showing a holding state of the sound absorbing panel.

FIG. 13 is a perspective view of a main part of the sound absorbing panel in a holding state.

FIG. 14 is a view showing an attached state of a fab stage scaffold.

FIG. 15 is a diagram showing a welding operation of the bracket mounting plate.

FIG. 16 is a diagram showing an operation of attaching a bracket.

FIG. 17 is a diagram showing an operation of attaching a suspension channel.

FIG. 18 is a diagram showing a heightening operation of the sound absorbing panel.

FIG. 19 is a diagram illustrating a main fixing operation of the sound absorbing panel.

FIG. 20 is a diagram illustrating an operation of attaching a decorative panel.

FIG. 21 is a view showing a work of removing a curing panel and the like.

FIG. 22 is a diagram showing an entire operation of removing a curing panel and the like.

FIG. 23 is a cutaway perspective view of a main part of a sound-absorbing panel fixedly arranged below a bridge of a viaduct.

FIG. 24 is a cross-sectional view of the entire viaduct with the sound-absorbing scaffold installed according to the present embodiment.

FIG. 25 is a plan view of the sound absorbing panel in a rectangular installation state.

FIG. 26 is a plan view of an example of a sound absorbing panel installation state bent at a small curvature.

FIG. 27 is a plan view of an example of a state where a sound absorbing panel is bent with a large curvature.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Sound absorption panel 3 ... Reinforcement structure 5 ... Sound absorption member 7 ... Sound absorption plate 9 ... Floor plate 11 ... Vertical stripe 13 ... Horizontal stripe 15 ... Web stripe 17 ... Punching plate 21 ... Mounting plate 33 ... Viaduct 35 ... Bridge pier 39 ... Chain suspension Metal fittings 41 ... Chain chain 43 ... Tan buckle with hook 45 ... Cover strut 47 ... Scaffold bracket 49 ... Fab stage scaffold 55 ... Bracket mounting plate 57 ... Bracket 59 ... Hanging channel 61 ... Facing panel

──────────────────────────────────────────────────続 き Continued on the front page (58) Fields surveyed (Int. Cl. ⁷ , DB name) E01D 19/10 E01D 21/00 E01F 8/00

Claims (9)

(57) [Claims] 1. Underside of viaduct for viaduct repair work
A construction method of a scaffold for acoustical panel that is spanned, the plurality of predetermined portions of the lower viaduct, length adjustable component
And removable hanging member to install them step comprises, at said hanging member by lifting the sound-absorbing panels working to hold it in the air, that Shikinami <br/> base a plurality of sound-absorbing panels scaffold-like process A fixing member is provided in the vicinity of the suspension member provided below the viaduct.
A step of fixedly provided, the step of adjusting the length-adjustable element of said hanging member to align the height of the absorbing panels mutually After deterministically fixing the absorbing panels in viaduct by the fixing member, the suspension step of removing the member, the construction method of the sound absorbing scaffold elevated Hashimoto, wherein from adult Rukoto various steps. 2. The sound absorbing panel according to claim 1, wherein the sound absorbing panel includes a structure in which a reinforcing bar is welded in a three-dimensional frame shape, and a sound absorbing member mounted in the structure .
Construction method of sound absorbing scaffold . 3. The method for constructing a sound-absorbing scaffold under a viaduct according to claim 2, wherein the sound-absorbing panel is transported to the viaduct in a state where the sound-absorbing member is mounted on the structure. 4. The sound- absorbing scaffold under a viaduct according to claim 2, wherein the sound-absorbing panel is transported to the viaduct in a state where the sound absorbing member is not attached to the structure, and is attached there.
Construction method. 5. The underpass according to claim 1, wherein the sound absorbing panel further comprises a sound absorbing plate above the structure.
Construction method of sound absorbing scaffold . 6. The underpass according to claim 1, wherein the sound absorbing panel further comprises a scaffold plate above the sound absorbing plate.
Construction method of sound absorbing scaffold . 7. The sound-absorbing panel is provided for holding in the air.
The construction method of a sound-absorbing scaffold under a viaduct according to claim 1, further comprising an engaging portion that engages with the suspension member. 8. The underpass of a viaduct according to claim 1, wherein the sound absorbing panel includes a sound absorbing panel having a rectangular shape in plan view and a sound absorbing panel having a substantially trapezoidal shape in plan view.
Construction method of sound absorbing scaffold . 9. The underpass according to claim 1, wherein the gap between the sound absorbing panels is covered by a predetermined member.
Construction method of sound absorbing scaffold .