KR100760332B1 - Temporary cantilever resources, construction method of structure using the same and dismantling method for the same - Google Patents

Abstract

A cantilever temporary material, a structure construction method using the same, and a dismantling method of the same are provided to reduce dismantling cost and time by releasing a horizontal tensile bolt and dismantling a connecting plate, a vertical material, a slant strut, and a horizontal material at one time. A cantilever temporary material comprises a vertical material(10), a connecting plate(20), a horizontal material, a horizontal tensile bolt(40), a slant strut, a supporting member, a first fixing nut(70), a second fixing nut(80), and a third fixing nut. The horizontal tensile bolt is fitted to a hollow part of the horizontal material, projected to both ends of the horizontal material, and formed with a male thread on the outer peripheral surface. The slant strut has a lower end coupled with the lower end of the vertical material, and an upper end coupled with the horizontal material. The third fixing nut is coupled with the rear end of the horizontal tensile bolt to fix the horizontal material. The first fixing nut includes a hollow projection(75), and the second fixing nut includes a hollow projection(85).

Description

Cantilever-type temporary material, construction method and dismantling method using same {Temporary cantilever resources, Construction method of structure using the same and Dismantling method for the same}

Figures 1a to 1e shows step by step the structure construction method using the cantilever type temporary material according to the present invention.

Figure 2 shows in detail the fixing member, connecting plate, horizontal tensioning bolt, the first fixing nut and the second fixing nut.

3A and 3B illustrate step-by-step methods of disassembling the cantilevered temporary material.

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

1: Pre-built structure 2: Structural material

3: joist 4: precast concrete panel

5: safety railing 6: sidewall formwork

7: Concrete concrete

10: vertical member 20: connecting plate

30: horizontal member 40: horizontal tension bolt

50: inclined brace 60: fixing material

70: first fixing nut 75: hollow protrusion (first fixing nut)

80: second fixing nut 85: hollow protrusion (second fixing nut)

90: third fixing nut

The present invention relates to a temporary material installed to build a horizontal tilt brace on top of a vertical tilt brace such as a bridge plate, a high-rise building, and installs a fixed material, a vertical material, a horizontal material, an inclined brace, a horizontal tensioning bolt, and the like, and the horizontal tension It relates to a cantilever type temporary structure which is simply dismantled by loosening a bolt.

In order to construct upper structures such as bridge decks and upper parts of high-rise buildings, temporary materials that support loads such as concrete concrete and workforce during construction are dismantled after construction. There are many types of temporary materials, which will be selected in consideration of various general factors such as the structure of bridges and buildings, site topography, height of construction, traffic conditions such as the bottom of bridges, air and construction costs.

Conventionally, as a temporary construction method for installing upper structures such as bridge decks and upper parts of high-rise buildings, bridge bridges are installed to support girders between bridges already constructed, and copper bars are installed by using system supports from lower foundations. After that, it mainly applies to the dong-bar method for installing the slab concrete at the upper part, the wood-bar method for installing the wooden club at the top of the pier, or the mobile scaffolding method for constructing one span at a time using mechanized copper ball and formwork. I have been.

However, the Dongbari method of installing Dongbari from the bottom of the bridge has a disadvantage of requiring a lot of materials and manpower when the height of the construction is high, and the geometry space to be secured as a temporary space, and a work space for the installation and dismantling of the Dongbari and the formwork. And to ensure safety, the scaffolding work to install a temporary scaffold, such as work scaffolding or safety nets, by connecting the iron wires from the stud bolts protruding on the girder and lowering the side pipe scaffolding.

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.

On the other hand, the temporary material should be dismantled after the construction is completed, so the dismantling work of the temporary material is just as important as the installation work, and the cost, time, and manpower required for dismantling the temporary material can have a big influence on the overall construction cost of the bridge, building, etc have.

Therefore, the present inventors have developed a temporary structure that can significantly reduce the cost and time required for dismantling by performing the dismantling operation by a simple operation without separate scaffolding or large equipment for dismantling the temporary material.

An object of the present invention is to provide a construction method such as a bridge superstructure difficult to ground work using the temporary construction material, the construction method and the method of dismantling the temporary construction material, which can be dismantled by simple operation without a separate scaffolding or lifting equipment. To significantly reduce the cost and time required.

The present invention is a temporary material installed to build an upper structure difficult to work on the ground, such as a bridge top plate, an upper slab on a base construction structure such as a bridge, a building, a vertical member having a predetermined length; A connecting plate coupled to an upper end of the vertical member; A horizontal member having a predetermined length and having a hollow portion formed in the longitudinal direction; A bar-shaped member inserted into the horizontal member hollow part and projecting to both ends of the horizontal member, the horizontal tension bolt having a male thread formed on an outer circumferential surface thereof; It has a predetermined length, the lower end is coupled to the lower end of the vertical member, the upper end is inclined brace to combine with the horizontal member; Fixing member consisting of a vertical plate and a horizontal plate to be perpendicularly coupled; A first fixing nut disposed on the front surface of the fixing member vertical plate; A second fixing nut welded to the rear surface of the connecting plate; And a third fixing nut coupled to the rear end of the horizontal tension bolt to fix the horizontal member. It is configured to include, wherein the fixing member horizontal plate is fixed to the top of the base structure, the front end of the horizontal tensioning bolt through the first fixing nut, the fixing member vertical plate and the connecting plate in turn to the second fixing nut It provides a cantilever type temporary material, characterized in that coupled with.

On the other hand, using the cantilever-type temporary material of claim 1 to claim 3 in the method of building an upper structure difficult to work on the ground, such as bridge deck, upper slab on the existing structure of bridges, buildings, etc. (a) working the fixing material Arranging the plurality of vertical members at predetermined intervals on the connecting plate to which the second fixing nut is welded, and connecting the inclined braces to the vertical members; (b) connecting the horizontal member to each of the inclined braces, and inserting the horizontal tension bolt to the hollow of the horizontal member, and the front end of the horizontal tension bolt passes through the first fixing nut, the fixing member vertical plate, and the connecting plate in order. By coupling to the second fixing nut, the rear end is coupled to the third fixing nut to complete the assembly of the cantilever type temporary material; (c) fixing the horizontal plate of the fixing member to an upper end of the base structure to install the cantilever type temporary member on the base structure; (d) installing a plurality of joists crossing the plurality of horizontal members, and installing a precast concrete panel on the joists; (e) constructing the upper structure by installing a safety handrail and sidewall formwork on the horizontal member and placing and curing concrete concrete; It provides a structure construction method using a cantilever-type temporary material, characterized in that it comprises a.

In addition, the present invention by using the cantilever-type temporary member of any one of claims 1 to 3 to build an upper structure, such as a bridge top plate, upper slab, etc. on the existing construction structures such as bridges, buildings, and the like cantilever-type temporary material In the disassembling method, (a) loosening the horizontal member by loosening the third fixing nut; And (b) dismounting the connecting plate, vertical member, inclined brace, and horizontal member integrated from the fixing member by pulling while unwinding the horizontal tensioning bolt. It provides a cantilever type temporary material dismantling method comprising a.

Figures 1a to 1e shows step by step the structure construction method using the cantilever type temporary material according to the present invention. Figure 2 shows in detail the fixing member, connecting plate, horizontal tensioning bolt, the first fixing nut and the second fixing nut. 3A and 3B illustrate step-by-step methods of disassembling the cantilevered temporary material.

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

Hereinafter, in the present patent application specification, bridges, buildings, and the like, which have already been constructed, are referred to as "base construction structures", and bridge tops and upper slabs of buildings constructed by temporary materials are referred to as "upper structures".

I. Cantilever Type  Construction

A state in which the cantilever type temporary material according to the present invention is installed in the base structure is shown in FIG. 1C. The cantilever-type temporary material is a horizontal member 30 directly receiving a load during the construction of the upper structure, an inclined brace 50 for transmitting the rotation moment by the load to the vertical member, and receives the rotation moment to the side wall of the base construction structure Consists of the vertical member 10, connecting the vertical member 10 and the horizontal member 30, the fixing member 60, the connecting plate 20, horizontal tension bolt 40 for installing the temporary member to the base structure (1) The first fixing nut 70 and the second fixing nut 80 are configured.

The vertical member 10 and the horizontal member 30 may use an angle pipe, and the length may be adjusted as necessary. In particular, the horizontal member 30 should be a hollow portion in the longitudinal direction so that the horizontal tension bolt 40 to be described later to be inserted. The inclined brace 50 is coupled to the bottom and the bottom of the vertical member 10 and the top is coupled to the horizontal member 30, the inclined brace 50 is also configured to adjust the length and vertical member (10) And each node connected to the horizontal member 30 is preferably configured in the hinge type to enable fine adjustment.

The fixing member 60 is composed of a vertical plate 61 and a horizontal plate 62 to be perpendicularly coupled as a member for fixing the temporary member to the base structure (1). The fixing member horizontal plate 62 is fixed to the upper end of the base construction structure 1, specifically, is attached to the beam of the bridge, the frame of the building, and the like.

The connecting plate 20 is a plate that is coupled to the upper end of the vertical member, the connecting plate 20 and the vertical member is preferably welded to integrate.

The horizontal tension bolt 40 has a male thread formed on the outer circumferential surface thereof, and is inserted into the hollow of the horizontal member 30 so as to protrude to both ends of the horizontal member. The front end of the horizontal tensioning bolt 40 passes through the first fixing nut 70, the fixing member vertical plate 61, and the connecting plate 20 in turn, and then is coupled to and fixed to the second fixing nut 80. As a result, the fixing member 60, the connecting plate 20, the vertical member 10, and the horizontal member 30 serve to combine the structure into one structure (see FIG. 2).

In detail, the vertical plate 61 and the connecting plate 20 of the fixing member 60 should be in contact with each other, and the first fixing nut 70 is disposed on the front surface of the vertical plate 61 and the connecting plate ( The second fixing nut 80 is welded and integrated on the rear surface of the 20 so that the front end of the horizontal tensioning bolt 40 is fixed by the first and second fixing nuts 70 and 80.

At this time, the fastening holes may be formed in the penetrating portions of the horizontal tensioning bolts on the plate surface of the vertical plate 61 and the connecting plate 20 of the fixing member, thereby facilitating the coupling of the horizontal tensioning bolts 40. .

In addition, the first fixing nut 70 is fitted into the fastening hole of the fixing plate vertical plate 61, has a width greater than or equal to the thickness of the vertical plate 61, and the female thread of the inner circumferential surface is continuous with the female thread of the nut hole. The hollow hollow protrusion 75 is formed, and the second fixing nut 80 is fitted into the connection hole of the connecting plate 20 and has a width corresponding to the thickness of the connecting plate 20. The female thread of the inner circumferential surface of the inner thread surface can prevent breakage and wear of the male thread of the outer circumferential surface of the horizontal tension bolt 40 by forming a hollow protrusion 85 configured to be continuous with the female thread of the nut hole.

If there is no hollow protrusions 75 and 85 of the first and second fixing nuts as described above, the shear load due to the upper structure is the horizontal tension bolt 40 at the portion passing through the fixing plate vertical plate 61 and the connecting plate 20. In particular, even when the horizontal tension bolt 40 is dismantled, even when the shear load is partially distributed by tightening the first and second fixing nuts 70 and 80, the fixing member vertical plate 61 and the connecting plate 20 ), The male thread on the outer peripheral surface of the horizontal tension bolt 40 may be damaged.

Therefore, since the hollow protrusions 75 and 85 of the first and second fixing nuts are formed to surround and protect the through portions of the fixing member vertical plate 61 and the connecting plate 20, respectively, the outer peripheral surface of the horizontal tension bolt 40 The male thread is protected, thereby increasing the number of times of the horizontal tensioning bolt 40 to enjoy the effect of material savings.

II. Cantilever Type  Structure construction method using temporary materials

The upper structure construction method using the cantilever-type temporary material according to the present invention, a method for constructing the upper structure difficult to ground work, such as a bridge top plate, a high-rise building includes a step (a) to (e).

In the step (a), the fixing member 60 is disposed on the working surface, and the plurality of vertical members 10 are disposed at predetermined intervals on the connecting plate 20 to which the second fixing nut 80 is welded. And, the step of connecting the inclined brace 50 for each of the vertical member (10). (See Figure 1a)

In the step (b), the horizontal member 30 is connected to each of the inclined braces 50, and the horizontal tension bolt 40 is inserted into the hollow of the horizontal member 30, and the front end of the horizontal tension bolt 40 is removed. The first fixing nut 70, the fixing member vertical plate 61 and the connecting plate 20 to be coupled to the second fixing nut 80, the rear end of the third fixing nut 90 Assembling the temporary material by combining with. (See Figure 1b)

In the step (c), the horizontal plate 62 of the fixing member is fixed to the upper end of the base construction structure 1 to attach the temporary construction material to the base construction structure 1. Since the fixing member 60 is fixed to the temporary construction material by combining with the upper structural member 2, such as a bridge of a bridge, a frame of a building, the contact area between the horizontal plate 62 and the base construction structure 1 should be sufficiently secured. do. (See Figure 1c)

In the step (d), a plurality of joists 3 crossing the plurality of horizontal members 30 are installed, and a precast concrete panel 4 is installed on the joists 3. The precast concrete panel 4 serves as a slab formwork and is integrated with the upper structure after placing and curing concrete concrete (7). The joist 3 serves to evenly distribute the load on the precast concrete panel 4. (See Figure 1D)

The step (e) is a step of constructing the upper structure by installing a safety handrail 5 and side wall formwork 6 on the horizontal member, and placing and curing concrete concrete 7. At this time, the length of the horizontal member 30 can be used as a concrete management passage extending as necessary. (See Figure 1e)

III. Cantilever Type  Dismantling Method

The cantilever type temporary material dismantling method according to the present invention includes a method of dismantling the temporary material by a simple operation without a separate scaffolding or lifting equipment, and includes the following steps (a) and (b).

Step (a) is to loosen the horizontal member by loosening the third fixing nut (90). After constructing a structure on the upper part of a bridge, a high-rise building, etc. using the cantilever-type temporary material of any one of Claims 1-3, an operator places the side wall formwork 6 and the safety railing 5 on the said upper structure. It is possible to disassemble and release the third fixing nut 90. When the third fixing nut 90 is released, the horizontal member is relaxed to dismantle the joists 3 arranged to cross the horizontal member. (See Figure 3a)

In the step (b), the horizontal tensioning bolt 40 is pulled out to disassemble the connecting plate 20, the vertical member 10, the inclined brace 50, and the horizontal member 30 that are integrated from the fixing member 60 at one time. The temporary dismantling work is completed by performing this step (b). At this time. Other temporary members other than the fixing member 60 embedded in the upper structure may be reassembled and used. (See Figure 3b)

According to the present invention as described above has the following effects.

1. In a situation where a separate scaffold or lifting equipment is required, such as a bridge or a high-rise building, the dismantling cost of the existing temporary material is generally estimated to be 100 to 150% of the installation cost as the execution cost, but the cantilever type temporary material according to the present invention In this case, the worker can dismantle the vertical tensioning bolts at one time by releasing the horizontal tensioning bolts on the inclined brace that is completed, thereby greatly reducing the dismantling cost and dismantling time.

2. If the first and second fixing nuts with hollow protrusions are used, the vertical member and the horizontal member are removed when the horizontal tension bolt is released for dismantling the vertical material and when the horizontal tension bolt is pulled outward in the axial direction for dismantling the horizontal tension bolt. It can prevent the damage or wear of external thread on the outer peripheral surface of horizontal tension bolt due to shear load between tension bolts.

Claims (5)

In the temporary material installed to build upper structures such as bridge decks and upper slabs, which are difficult to work on the ground, on top of existing structures such as bridges and buildings, A vertical member having a predetermined length; A connecting plate coupled to an upper end of the vertical member; A horizontal member having a predetermined length and having a hollow portion formed in the longitudinal direction; A bar-shaped member inserted into the horizontal member hollow part and projecting to both ends of the horizontal member, the horizontal tension bolt having a male thread formed on an outer circumferential surface thereof; It has a predetermined length, the lower end is coupled to the lower end of the vertical member, the upper end is inclined brace to combine with the horizontal member; Fixing member consisting of a vertical plate and a horizontal plate to be perpendicularly coupled; A first fixing nut disposed on the front surface of the fixing member vertical plate; A second fixing nut welded to the rear surface of the connecting plate; And A third fixing nut coupled to the rear end of the horizontal tension bolt to fix the horizontal member; Consists of including The fixing member horizontal plate is fixed to the top of the base construction structure, The front end of the horizontal tension bolt cantilever-type temporary member, characterized in that through the first fixing nut, the fixing member vertical plate and the connecting plate in order to combine with the second fixing nut. In claim 1, Cantilever-type temporary material, characterized in that the fastening hole is formed in each of the fixing plate vertical plate and the plate surface of the horizontal tension bolt penetrates. In claim 2, The first fixing nut is inserted into the fixing plate vertical plate fastening hole, has a width greater than or equal to the thickness of the vertical plate, the inner circumferential surface comprises a hollow protrusion formed with a female thread continuous with the female thread of the nut hole , The second fixing nut is fitted into the connecting plate fastening hole, has a width corresponding to the thickness of the connecting plate, and the inner peripheral surface includes a hollow protrusion formed with a female thread continuous with the female thread of the nut hole. Cantilever type temporary material, characterized in that. In the method of constructing an upper structure, such as bridge deck, upper slab, difficult to ground work on the existing construction structures such as bridges, buildings, etc. using the cantilever-type temporary material of any one of claims 1 to 3, (a) arranging the fixing member on a working surface, arranging the plurality of vertical members at a predetermined interval to the connecting plate on which the second fixing nut is welded, and connecting the inclined braces to the vertical members; (b) connecting the horizontal member to each of the inclined braces, and inserting the horizontal tension bolt to the hollow of the horizontal member, and the front end of the horizontal tension bolt passes through the first fixing nut, the fixing member vertical plate, and the connecting plate in order. By coupling to the second fixing nut, the rear end is coupled to the third fixing nut to complete the assembly of the cantilever type temporary material; (c) fixing the horizontal plate of the fixing member to an upper end of the base structure to install the cantilever type temporary member on the base structure; (d) installing a plurality of joists crossing the plurality of horizontal members, and installing a precast concrete panel on the joists; (e) constructing the upper structure by installing a safety handrail and sidewall formwork on the horizontal member and placing and curing concrete concrete; Structure construction method using a cantilever type temporary material, comprising a. In the method of dismantling the cantilever-type temporary material after the construction of the upper structure, such as the bridge deck, upper slab, etc. on the base structure of the bridge, building, etc. using the cantilever-type temporary material of any one of claims 1 to 3. (a) releasing the third fixing nut to relax the horizontal member; And (b) dismounting the connecting plate, vertical member, inclined brace and the horizontal member integrated from the fixing member by pulling the horizontal tensioning bolt while pulling it; Cantilever-type temporary material dismantling method comprising a.

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