KR20020018401A - A scaffolding clamp and the temporary work method for construction of steel bridge using the same - Google Patents

Abstract

PURPOSE: A scaffold clamp is provided to place a concrete floor slab and to execute a maintenance work for a bridge simply by installing a support, a safety net and a scaffold on the temporary frame by completing a temporary frame on a bridge. CONSTITUTION: The scaffold clamp(5) comprises: a main body(10) divided into both C-shaped side parts(11) containing an L-shaped hanging piece(13) formed on the upper end, and a connection part connecting the lower ends of the side parts(11) and forming an incline; and a wedge(20) fitted into the main body(10) and provided with a same incline(22) as the incline of the connection part on the lower side, a compression part(21) formed on the upper side horizontally, and ends(25a,25b) formed on both ends.

Description

Scaffolding clamp and the temporary work method for construction of steel bridge using the same

The present invention relates to a scaffolding clamp and a steel bridge construction method using the same. More specifically, in construction that is difficult to work on the ground, such as bridges, by simply assembling with horizontal members, the construction of the temporary frame on the upper part of the pier, the installation of copper bars, safety nets, and working scaffolding above the temporary frame, laying concrete decks and maintaining bridges It relates to a scaffolding clamp that can be easily performed and a steel bridge hypothesis method using the same.

In general, the construction method for slab casting to the upper part of the pier constructed in the bridge construction is selected in consideration of various comprehensive factors such as the type of bridge, site topography, height of construction, traffic conditions under the bridge, air and construction cost.

Conventionally, as a temporary method for installing an upper structure, a bridge angle for supporting the girders is already installed between the already constructed piers, and a slab concrete is placed on the upper part after installing the copper bar using a system support from the lower piers. It has been mainly applied to the construction method for installing the formwork for the construction, the construction method for installing the timber clubs on top of the piers, or the mobile scaffolding method for constructing one span at a time using mechanized construction tools and formwork.

However, the Dongbari method of installing Dongbari from the lower part of the bridge has the disadvantage of requiring a lot of materials and manpower when the height of the construction height is high, and the geometry space must be secured as a temporary space.In addition to the installation of Dongbari and formwork, In order to secure space, the scaffolding work must be preceded by connecting the steel wires from the stud bolts protruding from the upper part of the girder and then lowering it to the side to tie up the scaffolding scaffolding and to install temporary materials such as work scaffolding or safety nets.

On the other hand, the construction method for installing wood clubs is to install the workbench and slab clubs between the girders and girders at required intervals, and then assemble the slab formwork with plywood, etc. Due to its poor rigidity, it must be installed at narrow intervals, and it is easily damaged due to repeated installation and dismantling operations, which lowers the capacity ratio and consequently increases the construction cost.

In addition, in the mobile scaffolding method, it is not necessary to install the copper bar from the ground, so it can be installed without being influenced by the conditions of the mold space or the ground, but the installation work is complicated and the input of large equipment is essential.

Therefore, the present inventors have developed a scaffolding clamp and a steel bridge construction method using the same, which can install a copper bar at the top of a pier while at the same time eliminating the above-mentioned drawbacks.

The object of the present invention is to complete the construction of the temporary frame on the top of the pier by simply assembling the horizontal member in the construction of difficult ground work such as bridges, and to install the concrete bar, safety net or working scaffold above the temporary frame to maintain the concrete flooring and bridge maintenance It is to provide a scaffolding clamp for the scaffolding installation and steel bridge construction method using the same that can be easily performed.

Another object of the present invention is to provide a scaffolding clamp and a steel bridge construction method using the same can be expected to reduce the material cost and labor costs by enabling the installation of the copper bar at the top of the bridge, girder height from the system bridge bar from the bottom of the piers will be.

It is still another object of the present invention to provide a scaffolding clamp and a method for installing steel bridges using the same, which can reduce construction waste and make economical construction by using steel materials having better durability and rigidity than wood.

1 and 2 are perspective views of the wedge scaffolding clamp of the present invention.

3 is a side view (a) and a perspective view (b) showing a state of use of the wedge scaffolding clamp of the present invention.

4 is a cross-sectional view of the wedge scaffolding clamp showing a modification of the wedge.

5 is a perspective view of a bolted scaffolding clamp which is another embodiment of the present invention.

6 is a side view (a), a sectional view (b), and a perspective view (c) showing a state of use of the bolted scaffolding clamp which is another embodiment of the present invention.

7 and 8 are cross-sectional views and detailed perspective views of a state in which a temporary member is installed by using the scaffold clamp of the present invention in a bridge.

<Description of the symbols for the main parts of the drawings>

1: pier 2: girder

3: member with jaw formed 4: jaw

5: wedge scaffolding clamp 5 ′: bolted scaffolding clamp

6: Formwork 7: Circle

8: concrete slab 10, 30: main body

11, 31: side part 12, 32: connection part

13, 33: Jam piece 15: Rib

17: Embossing 19: Push pin

20: wedge 21: crimp surface

22: inclined surface 25a, 25b: copper surface

40: stationary body 41: crimp

43: fitting 50: horizontal

The present invention will be described with reference to the drawings.

1 and 2 are perspective views of the wedge scaffolding clamp of the present invention, and FIG. 3 is a side view (a) and a perspective view (b) showing the state of use of the wedge scaffolding clamp, and the wedge scaffolding clamp of the present invention (5). ) Is configured to include the main body 10 and the wedge 20.

The main body 10 is divided into a connecting portion 12 connecting the lower side portions 11 of both sides and the lower side portions 11 of the both sides in a U-shape as a whole, and the upper end of the side portion 11 is an L-shaped locking piece 13. Is formed and the connecting portion 12 forms an inclined surface. The main body 10 is installed while the locking piece 13 is applied to the jaw 4 of the member 3 on which the jaw is formed. As shown in FIG. 2, the side portion 11 of the main body may be pressed by a press so that the convex outwardly concave and inwardly concave embossing 17 may be processed or the reinforcing plate may be bonded outwardly. This is to prevent the bending or twisting by reinforcing the side portion 11 made of a plate-like member having a certain thickness. In addition, when the rib 15 is joined to the outer side of the upper side of the upper side of the side portion 11, the contact portion with the jaw 4 of the jaw formed member 3 can be widened, which is more effective in preventing warping or twisting. .

The wedge 20 is fitted inside the main body 10 and is longer than the length of the connecting portion 12, and the lower surface forms the same inclined surface 22 as the connecting portion 12 of the main body and the upper surface of the pressing surface 21 horizontally. And both ends form the side surface 25a, 25b. The end surfaces 25a and 25b of the both ends are formed at the ends of the inclined surface 22 and thus have different sizes. Since the pressing surface 21 of the wedge bar is provided with a horizontal member 50 to the upper portion of the wedge 20 is in close contact with the horizontal member 50 to be produced in various ways depending on the shape of the horizontal member 50 used as shown in FIG. Can be. FIG. 4a illustrates a case in which a circular steel pipe is used as the horizontal member 50, and a longitudinal cross section of the crimping surface 21 forms an arc, and FIG. 4b illustrates a crimped surface 21 in the case of using a square steel tube or various shaped steels as the horizontal member 50. 4c is a horizontal member 50, so that the end face of the crimping surface 21 is a circular arc and both ends are straight, so that any one of a square steel pipe, a circular steel pipe, or a shaped steel can be used as the horizontal member 50. .

In addition, when the fixing pin 19 is bonded to the connection part 12 of the main body to the inside of the main body and the slits 22 of the wedge are formed to have an elongated slit having a width smaller than that of the head of the fixing pin 19. And wedge 20 are not separated to facilitate handling and management.

5 is a perspective view of a bolted scaffolding clamp 5 'which is another embodiment of the present invention, and is generally the same as the wedge-type scaffolding clamp 5 described above, but is fixed in place of the wedge by fixing the main body to a member having a jaw. There is a difference in using.

The main body 30 is divided into a connecting portion 32 connecting the lower side portions 31 of both sides and the lower side portions 31 of the both sides in a U-shape as a whole, and the upper end portion of the side portion 31 is a L-shaped locking piece 33. Is formed and a female screw hole is formed in the center of the connecting portion 32. The fixed body 40 is coupled to the female screw hole formed in the main body connecting portion 32 to be coupled to the main body 30, and the rod-shaped control port 43 and the control port 43 formed with a male screw on the outer circumference It consists of a crimping opening 41 to be attached. At this time, if the control sphere 43 and the pressing hole 41 is made to have a mutual gap as shown in the detailed drawing of the 6b, the pressing hole 41 does not rotate, but only the adjusting hole 43 rotates the fixed body 40 ) Position can be adjusted. The bolted scaffolding clamp 5 'can be reinforced with bending and torsion by embossing or joining ribs on the side of the main body in the same way as the above-described wedge scaffolding clamp 5, and a horizontal member using a clamping hole of a fixed body Depending on the shape of the shape can be variously modified.

7 and 8 are concrete examples in which a temporary member is installed by using the scaffold clamp of the present invention in a bridge, and the steel bridge temporary method will be described below.

When the pier construction, which is a substructure in the steel bridge, is completed, the girder 2 is installed at regular intervals on the pier 1. As the girder 2, a steel box, an H-beam or an I-beam can be used, and the steel box can be applied as it is formed to form a jaw, and in the case of an H-beam or an I-beam, a lower flange of the H-beam or I-beam Will replace the chin.

The wedge 20 of the wedge scaffold clamp 5 of the present invention is pushed toward the larger surface 25a, or the fixing body 40 of the bolted scaffold clamp 5 'is pulled out. 30) After sufficiently securing the inner space, the horizontal material 50 is inserted into the main body 10, 30, the inner space is prepared, so that the engaging pieces 13, 33 of the scaffolding clamp span the jaw of the girder 2. Install. In the case of the wedge-type scaffolding clamp 5, if the hammer surface 25a of the larger wedge is hit with a hammer, the inclined surface 22 of the wedge moves along the connecting portion 12 of the main body and the crimp surface 21 of the wedge is moved. ) And the horizontal member 50 is uniformly compressed to the lower surface of the girder 2, and the wedge scaffold clamp 5 and the horizontal member 50 are firmly fixed to the girder 2. In the case of the bolted scaffolding clamp 5 ', the bolted fastener 41 and the horizontal member 50 of the fixed body are tightened until the adjusting holes 43 of the fixed body are pressed until the bottom surface of the girder 2 is tightened. The scaffold clamp 5 'and the horizontal member 50 are firmly fixed to the girder 2.

When the scaffold clamps 5 and 5 'of the present invention and the horizontal member 50 are installed on the bridge in the same manner as described above, the slab concrete is placed on the horizontal member 50 as shown in FIG. Formwork for 6 can be installed. At this time, the copper club 7 is continuously installed along the girder at the height of the pier upper part, that is, from the lower part of the girder to the upper part of the girder. In addition, the installation of the safety net or scaffolding on the horizontal material without a separate scaffold installation work is completed the construction work. When the pier upper structure is completed, it is dismantled by working against the installation of temporary structure.

By using the scaffolding clamp and the steel bridge construction method using the same, the construction of the temporary frame on the top of the pier by simply assembling with the horizontal member in the construction work difficult such as bridges by installing a copper bar, safety net or work scaffold above the temporary frame Placing concrete decks and maintenance of bridges can be performed easily. In addition, it is possible to install a copper bar at the top of the pier and to the girder height from the system pier bar from the lower part of the pier, thereby reducing material and labor costs. In addition, the present invention can be used to reduce the construction waste, because the steel instead of wood, the steel is durable and stiffness, and the material is excellent in the rate of exclusive use, so economical construction in the bridge construction is repeated installation and disassembly of the temporary structure.

Claims (6)

It is generally divided into two sides of the side portion 11 and the connecting portion 12 connecting the lower ends of both side portions 11, the upper end of the side portion 11 is formed with a L-shaped engaging piece 13 and the connection portion 12, the main body 10 forming an inclined surface; And, The inner surface of the main body 10 is longer than the connecting portion 12, and the lower surface forms the same inclined surface 22 as the inclined surface of the main body connecting portion 12, and the upper surface forms a pressing surface 21 horizontally, and both ends are harnessed. Wedges 20 forming rib surfaces 25a and 25b; Scaffolding clamp comprising a. 2. The scaffolding clamp according to claim 1, wherein the side part (11) of the main body is pressed by a press and treated with an embossing (17) which is convex outwardly and concave outwardly, or a reinforcing plate is bonded outwardly. The scaffolding clamp according to claim 1 or 2, wherein a torsion reinforcing rib (15) is joined to an outer side of the upper engaging piece (13) of the side part (11) of the main body. 2. The scaffolding clamp of claim 1, wherein the crimping surface has a straight line or a circular arc or a center portion of an arc, and both ends thereof form a straight line. As a whole, it is divided into connecting portions 32 connecting the lower side portions 31 on both sides and the lower side portions 31 on both sides, and an upper end portion of the side portions 31 is formed with an L-shaped locking piece 33 and the connecting portion. A main body 30 in which a female screw hole is formed in the center of the 32; And, It is coupled to the female screw hole formed in the connecting portion 32 of the main body is coupled to the main body 30, the rod-shaped control port 43 is formed with a male screw on the outer circumference and the pressing hole attached to the upper control port 43 A fixed body 40 composed of 41; Scaffolding clamp comprising a. When the bridge pier (1) of the bridge is completed and the girder (2) is installed on the top of the bridge (1), it is prepared by inserting the horizontal member 50 into the main body of the scaffold clamp (5, 5 ') of claim 1 or 5. and; A latching piece (13, 33) of the scaffolding clamp of claim 1 or 5 so as to span the jaw of the girder (2); Claim 1 or 5 by hitting the larger surface 25a of the wedge 20 of the scaffolding clamp of claim 1 with a hammer or by tightening the adjuster 43 of the scaffolding clamp 5 'of claim 5. Securing the scaffold clamps 5, 5 'and the horizontal member 50 of the claim to the girder 2; And, Installing a club (7) over the horizontal member (50); Steel bridge hypothesis method comprising a.