JP2019007274A - Mechanical clamping device for temporary pier - Google Patents

Abstract

To provide a mechanical clamping device for a temporary pier capable of detachably connecting a support pile to a transverse reinforcement or a longitudinal reinforcement while absorbing construction errors and eliminating field welding with simple operation.SOLUTION: The clamping device is constituted of a combination of a pair of half circumferential clamp metal fittings 50B, 50B. The pair of half circumferential clamp metal fittings 50B, 50B includes a pair of embracing arms 54, 54 which is pivotally supported by an openable and closable member via support shafts 53, 53. The half circumferential clamp metal fitting 50B is movable forward and backward with respect to the end portion of the reinforcing member.SELECTED DRAWING: Figure 10

Description

  The present invention relates to a mechanical clamping device for a temporary pier that connects adjacent support piles with a reinforcing material constructed in a bridge axis crossing direction or a bridge axis longitudinal direction to reinforce a substructure.

In temporary pier construction, the reinforcement technology of the temporary pier substructure that reinforces multiple support piles in the longitudinal direction of the bridge axis or in the transverse direction of the bridge axis is well known, and the reinforcement horizontal joints, vertical braces, horizontal braces between adjacent support piles Various connecting means for connecting both ends of a reinforcing material such as the like have been proposed.
[Connecting means 1] The mounting hardware is welded to the peripheral surface of the support pile in the field, and the end of the reinforcing material is welded and connected to these mounting hardware in the field (FIG. 10 of Patent Document 1).
[Connecting means 2] A connecting pipe having a diameter larger than that of the support pile is fixed to the end of the reinforcing material in advance, and mortar or the like is put in an annular space formed between the peripheral surfaces of the connecting pipe inserted through the support pile. It fills and it fixes and connects between a support pile and a connection pipe (FIG. 4 of patent document 2).
[Connecting means 3]
A method in which the reinforcing material is configured to be extendable and connected by pressing both ends of the extended reinforcing material against the outer peripheral surface of the support pile (Patent Document 3)
[Connecting means 4]
A method in which a clamp mechanism with one hinge is added to both ends of a stretchable reinforcing material, and the clamp mechanism is clamped and connected to a support pile (Patent Document 4).

JP-A-2005-282280 Japanese Patent Laid-Open No. 2014-5562 JP 2003-193428 A JP 2004-244874 A

The conventional connection technique between the reinforcing material and the support pile has the following problems.
<1> When the connecting means 1 to be connected by welding is performed on the ground, it is a work at a high place, which causes great danger to the work and makes the quality control difficult and the construction period longer.
<2> When the connection means 1 by welding is performed underwater, it is an underwater operation by a diver, so that the work efficiency is lowered and the construction period is longer than that of the ground work.
<3> The connecting means 2 that is fixed by filling a fixing agent such as mortar between the peripheral surfaces of the support pile and the connecting pipe requires a large number of work steps and construction costs, and is not suitable for underwater work.
<4> In the connection means 1 and 2 that fix the support pile and the reinforcing material through welding or a fixing material, the dismantled temporary material cannot be reused, which is uneconomical.
<5> The connecting means 3 for pressing the telescopic reinforcing material against the support pile has a structure in which a hydraulic cylinder is incorporated into the reinforcing material, which increases the cost. Could come off.
<6> The connecting means 4 in which a clamp mechanism of one hinge is added to both ends of the extendable reinforcing material has a complicated structure in which a swing mechanism for opening and closing the clamping mechanism is incorporated in addition to the expanding and contracting mechanism of the reinforcing material. Therefore, the cost becomes very high, and the expansion angle of the clamp mechanism is small, so that the reinforcing member cannot be set between adjacent support piles by translating the support material in the lateral direction with respect to the support pile.

The present invention has been made in view of the above points, and an object thereof is to provide the following mechanical pier clamping device for a temporary pier.
<1> Eliminate on-site welding, absorb construction errors, and be able to connect between support pile and transverse reinforcement or between support pile and longitudinal reinforcement with simple operation.
<2> The structure can be simplified and manufactured at low cost.
<3> A transverse reinforcing material or a longitudinal reinforcing material can be suspended and installed between adjacent supporting piles in a stable posture from the side of the supporting pile.
<4> The pier substructure should be able to be efficiently reinforced in a short time.
<5> When underwater work is involved, the underwater work time by divers can be significantly reduced.
<6> The support pile can be attached in any form of steel pipe, column material or H-section steel having a circular cross section.

The present invention is constructed between a transverse reinforcing member and a support pile installed between a plurality of support piles adjacent to each other in the bridge axis crossing direction, or between a plurality of support piles adjacent to each other in the bridge axis longitudinal direction. It is invention of the mechanical clamp apparatus for temporary piers for connecting between a longitudinal stiffener and a support pile.
The clamp device is composed of a single full-length clamp fitting or a combination of a pair of half-round clamp fittings.
The all-round clamp fitting includes a pair of holding arms having a length capable of mounting the support pile.
The half-circular clamp fitting includes a pair of holding arms having a length capable of covering the half circumference of the support pile.
The clamping device may be configured by a combination of a half-circular clamp fitting and an auxiliary half-circular clamp fitting.
The full-circle clamp bracket, half-circumference clamp bracket, or auxiliary half-circumference clamp bracket is pivoted so that the pair of holding arms can be opened and closed horizontally through a pair of support shafts (two-hinge structure) arranged vertically. It is supported and attached to the end of the transverse reinforcing member or the longitudinal reinforcing member so as to be movable back and forth.
By forming the shape of the pair of holding arms in accordance with the cross-sectional shape of the support pile, the support pile is not limited to the steel pipe, and any column material or H-section steel can be fixed.
In construction, a clamping device having a two-hinge structure is attached in advance to both ends of the transverse reinforcing member or the longitudinal reinforcing member.
A pair of holding arms constituting the clamp device are expanded and the clamp device is retracted so that the clamp device does not collide with the support pile when the transverse reinforcing member or the longitudinal reinforcing member is suspended.
In this way, by hanging the transverse reinforcement or longitudinal reinforcement from the side of the support pile between adjacent support piles and holding the clamp device to the support pile to fix it, A transverse reinforcement or longitudinal reinforcement is installed on

The present invention has at least one of the following effects.
<1> Since the pair of holding arms of the clamp device are pivotally supported via a pair of support shafts, and the clamp device is attached to the end of the transverse reinforcing member or the longitudinal reinforcing member so as to freely advance and retract. When the transverse reinforcing member or the longitudinal reinforcing member is suspended from the side between the supporting piles, the pair of holding arms can be held and fixed to the supporting pile without colliding with the supporting pile.
Therefore, on-site welding can be eliminated and construction errors can be absorbed and firmly connected to the support pile.
<2> The clamp device can be manufactured at a low cost because it has a simple structure in which a pair of holding arms are pivotally supported by independent spindles.
<3> Since the projecting length of the clamp device from the end of the transverse reinforcing material or the longitudinal reinforcing material can be adjusted, the side of the supporting pile between adjacent supporting piles without causing a pair of holding arms to collide with the supporting pile It is possible to construct a transverse reinforcing member or a longitudinal reinforcing member by suspending from a side in a stable posture.
Therefore, the pier substructure can be efficiently reinforced in a short time.
In particular, since the attaching work and the disassembling work of the clamp device can be easily performed, when the underwater work is involved, the underwater work time by the diver can be greatly shortened.
<4> The clamping device can be fixed not only in a steel pipe having a circular cross-section but also in any form of a column member or H-shaped steel having a non-circular cross-sectional shape.
<5> Since the clamp device can be attached to and detached from the support pile, the removed clamp device can be used repeatedly.

Explanatory diagram of reinforcement method for pier substructure Arrow view seen from II-II in Fig. 1 The perspective view of the clamp device concerning the present invention Top view of the holding part holding the clamp device to the support pile It is explanatory drawing of the comparison which applied the clamp apparatus of 1 hinge structure, (A) is explanatory drawing at the time of laterally moving and suspending a reinforcing material, (B) is the form which connected the reinforcing material to one clamping arm. Illustration Overall perspective view of the process of transversely moving and lifting the cross reinforcement between the support piles Plane explanatory diagram of the process of moving transverse reinforcement between support piles and suspending Whole perspective view of the process of laterally moving and hanging the vertical reinforcement between the support piles Plane explanatory diagram of the process of laterally moving the vertical reinforcement between the support piles and suspending it The perspective view of the half circumference clamp metal fitting concerning Example 2. The top view of the clamp apparatus which concerns on Example 2 using a pair of half circumference clamp metal fittings The perspective view of the half circumference clamp metal fitting concerning Example 3. The top view of the clamp apparatus which concerns on Example 3 using a pair of half circumference clamp metal fittings The perspective view of the auxiliary | assistant half circumference clamp metal fitting which concerns on Example 4. FIG. The top view of the clamp apparatus which concerns on Example 4 which used the auxiliary | assistant half circumference clamp metal fitting and the half circumference clamp metal fitting together. The top view of the expanded clamp apparatus concerning Example 5 The top view of the clamp apparatus which concerns on Example 5 made to hold in a support pile The top view of the clamp apparatus which expanded according to the modification of Example 5 The top view of the clamp apparatus which concerns on the modification of Example 5 made to hold in a support pile

  Hereinafter, the present invention will be described in detail with reference to the drawings.

[Example 1]
<1> Outline of Temporary Pier The temporary pier 10 shown in FIGS. 1 and 2 will be described. The temporary pier 10 includes a lower work 11 and an upper work 12.
The substructure 11 includes a plurality of support piles 20 erected at a distance from the ground G, and a bridge shaft longitudinal direction of the support pile 20 adjacent to the cross reinforcement member 30 installed in the cross direction of the bridge axis of the adjacent support pile 20. And a longitudinal reinforcing member 40 erected.
The support pile 20 is made of a steel pipe, an H-shaped steel, a column (box steel), or a combination of these. In this example, a mode in which the support pile 20 is made of steel pipe over the entire length will be described.

The superstructure 12 includes a girder member 13 installed in the crossing direction of the bridge shaft between the heads of the plurality of support piles 20 and the longitudinal direction of the bridge shaft, and a plurality of lining materials 14 placed on the girder member 13.
The temporary pier 10 illustrated is an example, and can be applied to a known pier including a plurality of support piles 20.

In the present invention, a mechanical clamp device (hereinafter “clamp device”) 50 having a common structure is attached in advance to the ends of the reinforcing members 30 and 40, and a predetermined height of the support pile 20 is set via the clamp device 50. In addition, the reinforcing members 30 and 40 can be constructed.
Hereinafter, the construction material used for the substructure 11 will be described.

<2> Clamp Device When described with reference to FIGS. 3 and 4, the clamp device 50 is a mechanical connector that can hold and release the support pile 20.
This example demonstrates the case where the clamp apparatus 50 is comprised with the perimeter clamp metal fitting 50A which can clamp the one support pile 20 with single body.

<2.1> All-round clamp fitting 50A is a curved substrate 51 that can be externally mounted on the support pile 20, a gusset 52 that projects vertically from the center of the back surface 51a of the substrate 51, and A pair of holding arms 54, 54 pivotally supported to be opened and closed horizontally through a pair of support shafts 53, 53 disposed vertically on the back side, and the tip ends of the pair of holding arms 54, 54 And a tightening means 55 such as a bolt for tightening the screw, and has a symmetrical shape with respect to a longitudinal center line passing through the middle of the pair of support shafts 53, 53.

<2.1.1> Substrate The substrate 51 is a plate that can contact a part of the support pile 20 (less than half the circumference of the support pile) in cooperation with the pair of holding arms 54, 54. It is curved according to the curvature of the support pile 20 made of steel pipe.
Guide pieces 51c and 51c for restricting the reluctance of each holding arm 54 in the vertical direction protrude from the left and right side edges on the back surface 51a side of the substrate 51, and between the pair of guide pieces 51c and 51c. A slit 51d is formed through which the base of each holding arm 54 can be inserted.
The pair of guide pieces 51c, 51c is not an essential member and may be omitted.

<2.1.2> Gusset The gusset 52 is a connecting plate for connecting the all-round clamp fitting 50A to the ends of the reinforcing members 30 and 40, and a plurality of mounting bolts at the ends of the reinforcing members 30 and 40. 56 are connected to each other.
In this example, a support bracket 57 for pivotally supporting each holding arm 54 is shown protruding from the substrate 51, but the pair of support brackets 57 may be fixed to both side surfaces of the gusset 52.

<2.1.3> Holding Arms The pair of holding arms 54 and 54 is a plate body having a total length that can surround the entire circumference of the support pile 20, and in this example, according to the curvature of the support pile 20 made of steel pipe. Is curved.
Reinforcing ribs 54 a and 54 b are attached to the back side of each holding arm 54.
The base end of the reinforcing rib 54a having a strip shape curved in an arc shape along the holding arm 54 is pivotally supported by the support bracket 57 via the support shaft 53, and the pair of holding arms 54 and 54 are closed. Holding arms 54 and 54 are positioned on the extension of the substrate 51.
The tip of each holding arm 54 is bent at a right angle toward the outside, and a joining piece 54c is formed at the bent portion. A bolt hole 54d is formed in the joining piece 54c, and the pair of holding arms 54 and 54 are tightened with each other via the tightening means 55 to tighten the pair of holding arms 54 and 54c. It is possible to hug.

<2.2> When the clamping device has a single hinge structure For example, as shown in FIG. 5 (A), the base ends of the pair of holding arms 54 and 54 are pivotally supported by a single support shaft 53. However, in the case of this one-hinge structure, the expansion angle θ of the pair of holding arms 54, 54 (intersection of two straight lines connecting the support shaft 53 to the tip of each holding arm 54, 54) The angle is a narrow angle of 180 ° or less. Therefore, when the reinforcing member 30 (40) is translated laterally with respect to the support pile 20, the hatched portion of the holding arm 54 collides with the support pile 20, and the adjacent support piles 20 are adjacent to each other. It cannot be set.

<2.3> When a reinforcing material is connected to one holding arm In order to increase the opening angle θ of the pair of holding arms 54 and 54 having one hinge structure, for example, as shown in FIG. A structure in which the end of the reinforcing member 30 (40) is connected to and attached to the back surface of one of the holding arms 54 is also conceivable. The pair of opened holding arms 54, 54 cannot be suspended while the weight of the pair of holding arms 54, 54 is unbalanced and the verticality of the reinforcing member 30 (40) is maintained.

<2.4> Reason why the clamping device has a two-hinged structure In the present invention, in order to solve the above-described two problems, the two proximal ends of the pair of holding arms 54 and 54 are arranged with a space therebetween. The gusset 52 for connecting the end of the reinforcing member 30 (40) is provided at the center position on the back side of the substrate 51.

  Adopting the two-hinge structure is that the expansion angle of the pair of holding arms 54, 54 is increased so that the front ends of the pair of holding arms 54, 54 do not collide with the support pile 20 and adjacent support piles This is because it is possible to set from 20 sides.

The maximum spread angle of the pair of holding arms 54, 54 is an angle at which the tips of the pair of holding arms 54, 54 are located on the back side of the substrate 51 when the holding arms 54, 54 are fully opened. Good.
In short, when the pair of holding arms 54, 54 are turned in the expanding direction around the vertical support shafts 53, 53, the holding arms 54 are expanded until the tip ends are positioned on the back side of the substrate 51. It only needs to be configured.

<2.5> Reason why the gusset is joined to the center of the substrate The gusset 52 is joined to the center position on the back side of the substrate 51 because the all-round clamp fitting 50A when the pair of holding arms 54, 54 are expanded. This is to keep the weight balance even.

<2.6> Reason for enabling advancement / retraction of all-round clamp metal fittings The full-circle clamp metal fittings 50 </ b> A are attached to the end portions of the reinforcing members 30, 40 so as to be slidable horizontally.
In this example, a configuration is shown in which a long hole 52a, which is a bolt hole, is formed laterally on the gusset 52 side, but a long hole may be provided on the end side of each reinforcing material 30,40.
The circumferential clamp metal fitting 50A is configured to be able to advance and retreat in order to prevent the full circumference clamp metal fitting 50A from colliding with the support pile 20 when the reinforcing members 30 and 40 are set. This is for adjusting the mounting length of 50A according to the site.

  The reason why the pair of holding arms 54 and 54 is pivotally supported by two hinges and the whole clamp member 50A is attached to the ends of the reinforcing members 30 and 40 so as to be able to advance and retract is described in detail. explain.

As another means for avoiding the collision between the one-hinged clamp fitting shown in FIG. 5A and the support pile 20, a single support shaft 53 having a common base end of the pair of holding arms 54, 54 is used. It is conceivable that the clamp metal fitting that is pivotally supported is configured to move forward and backward with respect to the reinforcing material 30 (40), and the clamp metal fitting is retracted when the reinforcing material 30 (40) is suspended.
When the clamp fitting with one hinge structure is configured to be able to move forward and backward, stress concentrates on the problem that the total length of the reinforcing member 30 (40) must be shortened and the connecting portion between the clamp fitting and the reinforcing member 30 (40). The problem that it is easy arises. Further, since the advancement / retraction length of the clamp fitting becomes longer, workability at the site is deteriorated.

  In the present invention, in order to solve the above-mentioned problem that occurs when a clamp fitting having a single hinge structure is used, a pair of holding arms 54 and 54 are pivotally supported by two hinges, and end portions of the reinforcing members 30 and 40 are provided. On the other hand, a combination of attaching the all-round clamp fitting 50A so as to freely advance and retract is adopted.

<3> Crossing Reinforcement Material The crossing reinforcement material 30 is a reinforcement material erected in the crossing direction of the bridge axis of the adjacent support piles 20.
The transverse reinforcing member 30 illustrated in FIG. 6 will be described. The transverse reinforcing member 30 includes a plurality of horizontal joint members 31 arranged in parallel to each other, and a brace member that is connected obliquely between the upper and lower horizontal joint members 31. 32 and a mounting plate 33 disposed at the junction of the end of the horizontal joint member 31 and the end of the brace member 32.
Although FIG. 6 shows a form in which a transverse reinforcing member 30 is manufactured by combining four horizontal joint members 31 and three sets of brace members 32, two upper and lower horizontal joint members 31 and one set of brace members 32 are shown. May be combined into a unit.
The transverse reinforcing member 30 is not limited to the illustrated form, and a known rigid structural beam can be applied.

  Referring to FIG. 3, the all-round clamp fitting 50 </ b> A has the gusset 52 abutted against the mounting plate 33, sandwiches the abutment plate 34 from both sides, and a plurality of mounting bolts 56 are screwed to both ends of the transverse reinforcing member 30. Attach it to the part freely.

<4> Longitudinal Reinforcement Material The longitudinal reinforcement material 40 is a reinforcement material erected in the longitudinal direction of the bridge axis of the adjacent support piles 20.
The vertical reinforcing member 40 illustrated in FIG. 8 will be described. The vertical reinforcing member 40 includes a plurality of horizontal joints 41 arranged in parallel to each other and a truss member 42 obliquely connected between the upper and lower horizontal joints 41, 41. And a mounting plate disposed at the end of each horizontal joint member 41.
The longitudinal reinforcing member 40 is not limited to the illustrated truss structure, and a known rigid structure beam can be applied.

  The all-round clamp fitting 50A is attached to the mounting plates disposed at both ends of each horizontal joint member 41 so as to be freely advanced and retracted by the same connecting structure shown in FIG.

[Reinforcement method for substructure of temporary pier]
Next, a method for reinforcing the substructure 11 of the temporary pier 10 will be described.

<1> Standing up a support pile If it demonstrates with reference to FIG. 1, the several support pile 20 lifted with the crane will be built in the ground G vertically. When the ground is hard, a known drilling machine is inserted into the support pile 20 and driven to a predetermined depth while drilling.
Girder members 13 such as a receiving girder and a main girder are spanned and fixed between pile heads of a plurality of support piles 20, and a plurality of lining materials 14 are placed side by side on the upper surface of these girder members 13.
A crane (not shown) is installed on the lining material 14, and a plurality of support piles 20 are erected in front of the existing superstructure 12 along the bridge axis crossing direction.

<2> Construction of Crossing Reinforcement Material A process of laying the transverse reinforcement material 30 between the support piles 20 and 20 arranged in the crossing direction of the bridge axis will be described with reference to FIGS.

<2.1> Preparation for Suspension Prior to suspending, the above-described all-round clamp fitting 50A is attached to both ends of the transverse reinforcing member 30 in advance.
At this time, each circumferential clamp metal fitting 50 </ b> A has the pair of holding arms 54, 54 expanded, and each circumferential clamp metal fitting 50 </ b> A crosses the reinforcing material 30 until the circumference circumferential clamp metal fitting 50 </ b> A does not collide with the support pile 20. Set it back inward.

<2.2> Suspension of transverse reinforcement material The transverse reinforcement material 30 is lifted with a crane or the like, and the adjacent support piles 20 and 20 are moved from the state where they are positioned to the side of the support piles 20 and 20 as indicated by a two-dot chain line. Translate in the horizontal direction toward the middle.
Since the center of gravity of each circumferential clamp fitting 50A is located on the center line of the transverse reinforcing member 30 during the suspension work of the transverse reinforcing member 30, the transverse reinforcing member is maintained in a stable posture while maintaining verticality and horizontality. 30 can be suspended.
Since the circumferential clamps 50A at both ends of the transverse reinforcing member 30 are retracted, the circumferential clamps 50A do not collide with the adjacent support piles 20 and 20, but between the adjacent support piles 20 and 20. The transverse reinforcing material 30 can be suspended in a short time.

<2.3> Clamping operation by the clamping device The both ends of the transverse reinforcing member 30 can be fixed between the adjacent support piles 20 and 20 simply by performing a simple clamping operation by the all-around clamp fitting 50A described below. it can.

<2.3.1> Advance Operation of Clamp Device Each circumferential clamp metal fitting 50 </ b> A suspended together with the transverse reinforcing material 30 between adjacent support piles 20, 20 is separated from each support pile 20.
Therefore, each circumferential clamp metal fitting 50A is pulled out to bring the substrate 51 into contact with the circumferential surface of the support pile 20, and a plurality of mounting bolts 56 are tightened in this contact state to advance and retract each circumferential clamp metal fitting 50A. Fix impossible.
That is, when the transverse reinforcing member 30 is suspended between the adjacent support piles 20, 20, the entire circumferential clamp fitting 50 </ b> A is retracted to shorten the protruding length from the end of the transverse reinforcing member 30.
After suspending, each full-length clamp fitting 50A can be advanced and the overhang length of the full-length clamp fitting 50A can be freely adjusted, so that construction errors and the like of the support piles 20 and 20 can be easily absorbed.

<2.3.2> Holding operation by holding arms Next, the pair of holding arms 54 and 54 are rotated around the support shafts 53 and 53 so as to be held on the peripheral surface of the support pile 20. The joint pieces 54c and 54c that are butted together are fastened by the fastening means 55 to fix the entire circumference clamp fittings 50A to the support pile 20.

<3> Construction of Longitudinal Reinforcement Material A construction process for constructing the longitudinal reinforcement material 40 between the support piles 20 and 20 arranged in the longitudinal direction of the bridge shaft will be described with reference to FIGS. The construction work is basically the same as the construction work of the transverse reinforcing member 30 described above, except that the suspending direction is different.

<3.1> Preparation for Suspension All-round clamp fittings 50A are attached to both ends of the longitudinal reinforcing member 40 in advance.
At this time, the holding arms 54, 54 of each circumference clamp metal fitting 50 </ b> A are fully opened, and each circumference clamp metal fitting 50 </ b> A is retracted to the inside of the longitudinal reinforcing member 40.

<3.2> Suspension of longitudinal reinforcing material The longitudinal reinforcing material 40 is lifted by a crane or the like as shown by a two-dot chain line, and is moved laterally from the side of the support pile 20 to the adjacent support piles 20 and 20. Suspend.
At this time, the entire circumference clamp fitting 50A provided at both ends of the longitudinal reinforcing member 40 may be hung with a height difference (level difference) so that it does not interfere with the whole circumference clamp fitting 50A of the existing transverse reinforcement 30. It is essential.

<3.3> Clamping operation by the clamping device In the same manner as the construction work of the transverse reinforcing member 30 described above, each of the circumferential clamp fittings 50A is removed from the transverse reinforcing member 30 until the substrate 51 comes into contact with the peripheral surface of the support pile 20. Advance to the direction and fix.
The pair of holding arms 54 and 54 are rotated about the support shaft 53 to be held on the peripheral surface of the support pile 20, and the joint pieces 54 c and 54 c are tightened to attach the entire circumference clamp metal fitting 50 </ b> A to the support pile 20. Secure to.
The all-round clamp fitting 50A provided on the longitudinal reinforcing member 40 has a height difference with respect to the all-round clamp fitting 50A provided on the existing transverse reinforcing member 30, so that the two all-round clamp fittings 50A do not interfere with each other.

  Although illustration is omitted, it is possible to extend the same kind of reinforcing members 30 and 40 by providing a height difference in the entire circumference clamp metal fitting 50A.

<4> Repeat The temporary pier 10 is constructed by repeating the above steps.
At the time of construction, the transverse reinforcing member 30 and the longitudinal reinforcing member 40 can be hung horizontally from the side of the support pile 20, and the all-round clamp fittings 50A provided at both ends of each reinforcing member 30, 40 are bolted. Since it can be fixed to the support pile 20 by a simple operation that is simply tightened, the substructure 11 can be efficiently constructed as compared with the conventional technique of fixing by field welding.
In particular, even when the work of holding the entire circumference clamp metal fitting 50A and fixing it to the support pile 20 is performed underwater, the work burden on the diver can be reduced and the underwater work time can be greatly shortened.
Further, it is possible to easily change the mounting height and position of the all-round clamp fitting 50A during the construction.

[Dismantling and removal of temporary pier]
When dismantling the temporary pier 10, the upper work 12 and the lower work 11 are dismantled and removed by performing the reverse process of the assembly described above.
When the substructure 11 is disassembled and removed, each of the all-round clamp fittings 50A can be separated from the support pile 20 with a simple operation, and thus the all-around clamp fittings 50A can be reused.

[Example 2]
Hereinafter, other embodiments of the clamp device 50 will be described. In the description, the same portions as those of the above-described embodiments are denoted by the same reference numerals, and detailed description thereof will be omitted.

  With reference to FIGS. 10 and 11, a configuration in which the clamp device 50 is configured by a pair of half-circular clamp fittings 50 </ b> B and 50 </ b> B having the same structure will be described.

<1> Half-Circuit Clamp Metal Half-clamp metal fitting 50B includes a curved substrate 51 that can be externally mounted on the support pile 20, a gusset 52 that projects vertically from the center of the back surface 51a of the substrate 51, and a back surface side of the substrate 51. A pair of holding arms 54, 54 pivotally supported so as to be opened and closed horizontally through a pair of support shafts 53, 53 arranged vertically, and the tip portions of the paired holding arms 54, 54 And two sets of tightening means 55 such as bolts for tightening.
In the half-circle clamp fitting 50B, the entire length of the holding arm 54 has a length that can hold the half circumference of the support pile 20, and two sets of half-circle clamp fittings 50B and 50B are used as one set.
Therefore, in the clamping device 50 of this example, a total of four holding arms 54 and four support shafts 53 are combined.

<2> Clamping Method by Clamp Device In the second embodiment, the half-circular clamp metal fitting 50B is attached in advance to both ends of each reinforcing member 30, 40, the half-circular clamp metal fitting 50B is retracted and extended before and after suspension, etc. The basic operation is the same as that in the first embodiment.
In this example, as shown in FIG. 11, the reinforcing members 30 and 40 equipped with the half-circular clamp fitting 50B in an expanded state are suspended from the left and right sides of one support pile 20, and the substrate 51 of the half-circular clamp fitting 50B is suspended. Press against the support pile 20.
Next, the holding arms 54 and 54 of each set of half-circular clamp fittings 50 </ b> B are held half by half of the support pile 20.
The clamp device 50, which is completed by tightening the two abutting portions obtained by abutting the joining pieces 54c, 54c of the two sets of holding arms 54, 54 with the two sets of fastening means 55, is fixed to the support pile 20. .

  In the second embodiment, not only the same effects as the first embodiment described above are exhibited, but also the same type and the same shape of the half-circular clamp fittings 50B and 50B are held from both the left and right sides of the single support pile 20. The clamping device 50 can be completed.

[Example 3]
In the first and second embodiments, the clamp device 50 corresponding to the support pile 20 made of a steel pipe having a circular cross section has been described.
Another clamping device 50 will be described with reference to FIGS.
In this example, a configuration in which the clamp device 50 includes a pair of half-circular clamp fittings 50C and 50C having the same structure will be described.

<1> Support Pile with Non-circular Cross Section FIGS. 12 and 13 show a combination of a pair of half-circular clamp fittings 50C and 50C having the same shape and the same structure.
Although this example demonstrates the case where the support pile 20 is a column material which exhibits a cross-sectional rectangle, the support pile 20 can also be applied to H-shaped steel.

<2> Clamping Device A half-circular clamp metal fitting 50C includes a flat plate-like substrate 51 that can be externally mounted on one side surface (one side) of the support pile 20, and a gusset 52 that protrudes vertically in the center of the back surface 51a of the substrate 51. A pair of linear holding arms 54 and 54 pivotally supported so as to be opened and closed horizontally through a pair of support shafts 53 and 53 disposed vertically on a support bracket 57 on the back side of the substrate 51; And two sets of tightening means 55 such as bolts for tightening the front ends of the pair of holding arms 54, 54.

Compared to the second embodiment, the half-circular clamp fitting 50C of this example has a straight shape without bending the substrate 51 and the holding arms 54, 54, and the pivot interval between the pair of support shafts 53, 53 is larger. It is different because it is in a wider relationship than the width dimension of the support pile 20.
Furthermore, compared with the second embodiment, the half-clamp metal fitting 50C of this example uses two sets of half-circle clamp metal fittings 50B and 50B as one set and supports the entire length of the two holding arms 54 and 54. Two sets of tightening means for tightening the ends of the holding arms 54, 54 that have a length that can hold the other half of one side surface (one side) of the pile 20. The use of 55 is the same as in the second embodiment.

<3> Clamping Method by Clamp Device FIG. 13 shows a mode in which a single support pile 20 is sandwiched and held by a pair of half-circular clamp fittings 50C and 50C from the left and right sides.
A reinforcing member equipped with the half-clamp metal fitting 50C in an expanded state is hung between adjacent support piles 20 and the substrate 51 of the half-circle clamp metal fitting 50C is pressed against the support pile 20, and then the holding of each pair of half-clamp metal fittings 50C is held. The holding arms 54, 54 are held by the support pile 20 half by half, and the abutting portions where the joining pieces 54 c, 54 c of the two sets of holding arms 54, 54 are butted together are tightened by two sets of tightening means 55. Fixing the pair of semicircular clamp fittings 50C, 50C to the support pile 20 is the same as in the second embodiment described above.
A pair of substrates 51, 51 opposed to each other and two sets of holding arms 54 can be clamped and fixed to the entire circumference of the support pile 20.

  In the third embodiment, not only the same functions and effects as those of the first and second embodiments described above can be obtained, but also the support pile 20 having a non-circular cross-sectional shape can be attached.

[Example 4]
Another clamping device 50 will be described with reference to FIGS.
In this example, a configuration will be described in which the clamp device 50 is configured by combining the half-circular clamp metal fitting 50C described above and the auxiliary half-circular clamp metal fitting 50D.
<1> Support Pile In this example, the case where the support pile 20 is H-shaped steel will be described, but the support pile 20 can also be applied to a column material.
When the support pile 20 is H-shaped steel, a pair of padding materials 21 and 21 are used to seal the recessed space formed between the flange and the web.

<2> Clamp device The half-circular clamp fitting 50C is as described in the third embodiment.

<3> Auxiliary Half-Circuit Clamp Metal Auxiliary Half-Circuit Clamp 50D is arranged vertically on a flat board 51 that can be externally mounted on one side (one side) of the support pile 20 and a support bracket 57 on the back side of the board 51. The pair of linear holding arms 54 and 54 pivotally supported so as to be opened and closed horizontally through the pair of support shafts 53 and 53, and the distal ends of the paired holding arms 54 and 54 are tightened. And two sets of tightening means 55 such as bolts. The auxiliary half circumference clamp fitting 50D has no gusset.

<4> Clamping Method by Clamp Device FIG. 15 shows a mode in which a single support pile 20 is sandwiched and held by a pair of half-circular clamp fittings 50C and auxiliary half-circular clamp fittings 50D from the left and right sides. Yes.
The half clamp clamps 50C and 50D in an expanded state are arranged on the left and right sides of the support pile 20, and the holding arms 54 and 54 are held by the support pile 20 half by half. The clamping device 50 is completed by tightening the two butted portions where the joining pieces 54c and 54c are butted together by two sets of tightening means 55.
The entire circumference of the support pile 20 can be held and fixed by the pair of substrates 51, 51 opposed to each other and the two sets of holding arms 54.

  In the fourth embodiment, not only the same functions and effects as those of the first and second embodiments described above can be achieved, but also the support pile 20 having a non-circular cross-sectional shape can be attached.

[Example 5]
With reference to FIGS. 16 and 17, another clamping device 50 that can be attached to the support pile 20 having a non-circular cross-sectional shape will be described.
This example demonstrates the case where the clamp apparatus 50 is comprised with the perimeter clamp metal fitting 50E which can clamp the one support pile 20 with single body.

<1> All-round clamp metal fittings All-round clamp metal fittings 50E are vertically oriented in the center of a flat plate-like substrate 51 that can be externally attached to one side surface (one side) of the support pile 20 and the back surface 51a of the substrate 51. The projecting gusset 52, a pair of support shafts 53, 53 vertically disposed on the pair of support brackets 57, 57 on the back side of the substrate 51, and the pair of support shafts 53, 53 are directed horizontally. A pair of holding arms 54, 54 pivoted so as to be opened and closed and bent in an L shape (saddle shape), and a fastening means 55 such as a bolt for fastening the distal ends of the pair of holding arms 54, 54 are provided. doing.

<2> Holding Arms The pair of holding arms 54, 54 is a plate member that cooperates to surround and hold the entire circumference of the support pile 20, and each holding arm 54 surrounds a half circumference of the support pile 20. It has a possible overall length and is bent into an L shape (a bowl shape).
The base ends of the pair of holding arms 54 and 54 are pivotally supported on the pair of support brackets 57 and 57 via the pair of support shafts 53 and 53.

<3> Clamping Method by Clamp Device FIG. 17 shows a form in which the entire circumference clamp fitting 50E is set and held from the side of one support pile 20.
An all-round clamp metal fitting 50E in an expanded state is arranged on the side of the support pile 20, and a pair of holding arms 54, 54 are rotated around the support shaft 53 to be held on the peripheral surface of the support pile 20. Then, the joining pieces 54c and 54c are fastened by the fastening means 55 to fix the entire circumference clamp fitting 50E to the support pile 20.

  In the fifth embodiment, since the cross-sectional shape can be attached to the non-circular support pile 20 by using one kind of all-round clamp fitting 50E, the support shaft is compared with the embodiment in which two half-round clamp fittings described above are used in combination. The number of installed 53 is half.

[Modification]
FIGS. 18 and 19 show a modification in which the pair of holding arms 54 and 54 constituting the entire circumferential clamp metal fitting 50E is configured to be able to be folded.

<1> Holding arm full circumference clamp fitting In this example, each holding arm 54 is divided into a rear half part 54e and a front half part 54f by a bent part, and the overlapping part at the end of both half parts 54e, 54f is an intermediate support shaft. 53a is pivotably supported and can be folded.
The base part of the rear half part 54e of each holding arm 54 is pivotally supported by the support bracket 57 via the support shaft 53, and the joining pieces 54c formed at the front end part of the front half part 54f are brought into contact with each other via the fastening means 55. By tightening, the pair of holding arms 54 and 54 can be held and fixed to the support pile 20.

<2> Clamping Method by Clamping Device The clamping method to the support pile 20 by the all-round clamp fitting 50E in this example is the same as that of the previous Example 5, so that the description thereof is omitted.

The effect in this example is the same as that of Example 5 described above.
In this example, since the pair of holding arms 54 and 54 constituting the all-round clamp fitting 50E can be folded, the winding work of the pair of holding arms 54 and 54 around the support pile 20 is facilitated.

[Example 6]
In the above description, the same type of clamp devices 50, 50 are attached to both ends of the reinforcing members 30, 40. However, different types of clamp devices 50, 50 may be combined and attached.

For example, in the case where the support pile 20 is made of steel pipe, a combination of a full circumference clamp fitting 50A (FIG. 3) and a pair of half circumference clamp fittings 50B (FIG. 11) at each end of each reinforcing member 30,40. Install.
For example, when the support pile 20 is a non-circular steel material (column material, H-shaped steel), a combination of a pair of half circumference clamp fittings 50C (FIG. 13), half circumference clamp fittings 50C and auxiliary half circumference clamp fittings 50D (see FIG. 15), or any one of the clamp devices 50 including the entire circumference clamp fitting 50E (FIGS. 17 and 19) may be attached to each end portion of the reinforcing members 30 and 40 as appropriate.

  In this example, the combination of the clamp devices 50 and 50 can be properly used according to the cross-sectional shape of the support pile 20.

G ········································· 10 ..Back cover 20 ... Support pile 30 ... Transverse reinforcement 31 ... Horizontal joint 32 ... Brace material 33 ... Mounting plate 40 ... ... Vertical reinforcement 41 ... Horizontal joint 42 ... Truss 50 ... Clamping device 50A ... All-round clamp fittings (for steel pipes)
50E ・ ・ ・ ・ All around clamp bracket (Column, for H-section steel)
50B ・ ・ ・ ・ Half circumference clamp (for steel pipe)
50C ... ・ Circumferential clamp (column, for H-section steel)
50D ・ ・ ・ ・ Auxiliary semi-circular clamp fitting (Column, for H-section steel)
51... Substrate 51 a... Back surface 52... Gusset 52 a... Elongated holes 53 and 53... Pair of support shafts 54 and 54. ... Reinforcement rib 54b ... Reinforcement rib 54c ... Joint piece 54d ... Bolt hole 55 ... Tightening means 56 ... Mounting bolt

Claims (9)

Both ends of the transverse reinforcing material laid between a plurality of support piles adjacent in the crossing direction of the bridge axis, or a longitudinal reinforcing material laid between a plurality of supporting piles adjacent in the longitudinal direction of the bridge axis It is a mechanical clamping device for a temporary pier provided at both ends,
A substrate that can be externally mounted on a peripheral surface of a part of the support pile;
A pair of holding arms pivotally supported to be opened and closed via a pair of support shafts on the back side of the substrate;
A gusset that protrudes from the center of the back surface of the substrate and is movably connected to the end of the transverse reinforcing member or the longitudinal reinforcing member.
Mechanical clamp device for temporary pier.   It consists of a single all-round clamp fitting, and this all-round clamp fitting is projectable at the center of the back surface of the substrate, which can be externally mounted on a part of the peripheral surface of the support pile, and the end of the transverse reinforcing member or longitudinal reinforcing member The support pile is pivoted so that it can be opened and closed horizontally through a pair of support shafts that are vertically disposed on the mounting bracket on the back side of the substrate, and a gusset that is connected to the part with a bolt so as to be able to advance and retreat. A pair of holding arms having a length that can be packaged; and a fastening means for fastening the distal ends of the pair of holding arms; and the side of the support pile between the substrate of the clamping device and the pair of holding arms The mechanical clamp device for a temporary pier according to claim 1, wherein the mechanical clamp device is fixed by being held from the side.   A combination of a pair of semi-circular clamp fittings, each of the semi-circular clamp fittings being externally mounted on a part of the support pile, and protruding at the center of the back surface of the substrate, and an end portion of a transverse reinforcing member or a longitudinal reinforcing member A gusset connected with bolts so as to be able to advance and retreat, and a pair of support shafts arranged vertically on the mounting bracket on the back side of the substrate, and pivotally supported so as to be opened and closed horizontally, and the support pile is externally mounted. A pair of holding arms having a possible length; and a fastening means for fastening the distal ends of the pair of holding arms, and the substrate of the pair of semi-circular clamp fittings and the pair of holding arms are attached to a support pile. The mechanical clamp device for a temporary pier according to claim 1, wherein the mechanical clamp device is fixed by being held from both sides. It consists of a combination of a half-circle clamp bracket and an auxiliary half-circle clamp bracket.
A substrate that can be externally mounted on a part of a support pile, and a gusset that protrudes from the center of the back of the substrate and is connected to an end of a transverse reinforcing member or a longitudinal reinforcing member with a bolt so as to freely advance and retract; A pair of holding arms pivotally supported by a mounting bracket on the back side of the substrate so as to be opened and closed horizontally through a pair of support shafts arranged vertically, and having a length capable of sheathing a support pile; And a fastening means for fastening the distal ends of the pair of holding arms,
The auxiliary semi-circular clamp fitting is pivotally supported to open and close horizontally through a substrate that can be externally mounted on a part of a support pile and a pair of support shafts that are vertically disposed on a mounting bracket on the back side of the substrate. And a pair of holding arms having a length capable of mounting the support pile, and a fastening means for fastening the distal ends of the pair of holding arms,
The mechanical clamp device for a temporary pier according to claim 1, wherein the half-circumferential clamp fitting, the substrate of the auxiliary half-circular clamp fitting, and a pair of holding arms are held and fixed from both sides of the support pile.   The mechanical clamp device for a temporary pier according to any one of claims 2 to 4, wherein the pair of holding arms are curved in accordance with a cross-sectional shape of the support pile.   The mechanical clamp device for a temporary pier according to claim 2 or 3, wherein the pair of holding arms are bent in an L shape.   The mechanical clamp device for a temporary pier according to claim 5 or 6, wherein the mechanical clamp device is symmetrical with respect to the center of the substrate.   2. A long hole is horizontally formed in the gusset, and the gusset is connected to an end of a transverse reinforcing member or a longitudinal reinforcing member with a bolt through the long hole so as to be able to advance and retract. The mechanical clamp apparatus for temporary piers as described in any one of thru | or 4.   The mechanical clamp device for a temporary pier according to any one of claims 1 to 4, wherein the support pile is any one of a steel pipe, a column material, and an H-shaped steel.

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