KR20030093680A - The construction method of double-t girder bridge by underslung movable scaffolding system - Google Patents
The construction method of double-t girder bridge by underslung movable scaffolding system Download PDFInfo
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- 238000010276 construction Methods 0.000 title abstract description 21
- 238000009415 formwork Methods 0.000 claims abstract description 80
- 230000003014 reinforcing effect Effects 0.000 claims abstract description 43
- 238000000034 method Methods 0.000 claims abstract description 10
- 238000002360 preparation method Methods 0.000 claims description 5
- 230000002787 reinforcement Effects 0.000 claims description 5
- 239000011148 porous material Substances 0.000 claims description 4
- 229910000831 Steel Inorganic materials 0.000 claims description 3
- 238000007689 inspection Methods 0.000 claims description 3
- 239000010959 steel Substances 0.000 claims description 3
- 238000009434 installation Methods 0.000 abstract description 8
- 238000004519 manufacturing process Methods 0.000 abstract description 2
- 238000001514 detection method Methods 0.000 description 2
- 230000003187 abdominal effect Effects 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
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- 238000011900 installation process Methods 0.000 description 1
- 238000003892 spreading Methods 0.000 description 1
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D21/00—Methods or apparatus specially adapted for erecting or assembling bridges
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D19/00—Structural or constructional details of bridges
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Abstract
본 발명은 더블-티 교량을 하부지지형 이동식 비계공법(Underslung Movable Scaffolding System)으로 시공함에 있어 경간 단위로 철근을 선조립 (Prefabrication)하여 설치하는 시스템과 외부거푸집과 내부거푸집을 동시에 이동하는 방법 및 거푸집의 조립·해체시 기계적 장비에 의한 시공자동화 방식으로 시공하는 시스템에 관한 것이다.In the present invention, when constructing a double-tee bridge with the Underslung Movable Scaffolding System, a method and formwork for simultaneously moving the external formwork and the internal formwork and the system for prefabricating and installing reinforcing bars in span units The present invention relates to a system for installation by means of construction automation by mechanical equipment during assembling and disassembly.
본 발명은 기 타설된 교량상부에 철근 제작장을 설치하여 경간단위로 철근 및 쉬이스관을 조립하는 단계와; 다음 경간 콘크리트 타설을 위해 설치되어 있는 비계보까지 교량상부에 설치된 문형크레인의 호이스트(Hoist)를 이용하여 철근을 리프팅한 후, 이동·설치하는 단계와; 콘크리트 타설 후 거푸집을 해체하기 위한 준비작업 단계와; 내부거푸집과 바닥거푸집 및 외부거푸집순으로 순차적으로 유압잭을 이용하여 자동해체하는 단계와; 유압잭으로 비계보를 좌, 우측으로 이동시켜 교각브래킷에 설치된 이동장치를 이용하여 다음 경간으로 내, 외부거푸집을 동시에 이동하며, 다음 경간으로 이동 후 거푸집을 자동설치 하는 것을 특징으로 한다.The present invention comprises the steps of assembling the reinforcing bars and sheath pipe in the span unit by installing a reinforcing bar manufacturing site on the other bridge; Lifting and reinforcing the reinforcing bar using a hoist of a door-shaped crane mounted on the upper part of the bridge up to the scaffold installed for the next concrete pouring; A preparatory step of dismantling the formwork after the concrete is poured; Automatically dismantling the internal formwork, the bottom formwork, and the external formwork using the hydraulic jacks sequentially; By moving the scaffold to the left and right with the hydraulic jack, the inside and outside formwork is moved simultaneously to the next span by using the moving device installed on the bridge bracket, and the formwork is automatically installed after moving to the next span.
본 발명에 의한 시공방법은 경간 단위로 철근과 쉬이스관을 미리 조립하여 설치하고 또한 외부거푸집과 내부거푸집의 동시이동 및 외부거푸집과 내부거푸집의 조립·해체시 기계적 장비에 의해 자동화함으로서 시공성을 향상시킬 수 있으며, 이를 바탕으로 공사기간을 단축시킬 수 있다.The construction method according to the present invention improves the workability by pre-assembling and installing reinforcing bars and sheath pipes in the unit of span, and by the automatic movement of the external formwork and the internal formwork, and by the mechanical equipment during the assembly and disassembly of the external formwork and the internal formwork. Based on this, construction period can be shortened.
Description
본 발명은 이동식 비계공 더블-티 교량의 시공시 경간 단위로 철근을 선조립(Prefabrication)하여 설치하는 시스템과 외부거푸집(1)과 내부거푸집(2) 동시이동 및 거푸집의 조립·해체시 기계적 장비에 의한 자동화 시스템을 도입함으로서, 시공성 향상과 공사기간을 단축하는 시공방법에 관한 것이다.The present invention relates to a system for prefabricating and installing reinforcing bars in span units during construction of a mobile non-porous double-tee bridge, and to mechanical equipment during simultaneous movement and assembly and disassembly of external formwork (1) and internal formwork (2). The present invention relates to a construction method that improves workability and shortens construction period by introducing an automated system.
일반적인 이동식 비계공 형식의 교량은 1단계 비계보 및 외부거푸집 셋팅 및 검측; 2단계 바닥슬래브 철근, 벽체 철근, 쉬이스관 조립 및 설치; 3단계 내부거푸집 설치; 4단계 상부슬래브 철근을 조립·설치; 5단계 캠버조정 완료 후 콘크리트 타설 및 양생; 6단계 내부 강연선을 인장하는 단계; 7단계 후방 교각 브래킷 1조를 해체하여 전방이동방향으로 옮겨서 교각에 설치 단계; 8단계 거푸집 해체를 위한 준비작업 단계; 9단계 외부거푸집(1) 해체작업 단계; 10단계 외부거푸집(1) 및 이동식 비계공 장비 이동 단계; 11단계 내부거푸집(2) 해체 및 외부거푸집(1) 셋팅 작업 단계; 12단계 내부거푸집(2) 이동 및 셋팅 작업 단계로 12단계 공정으로 이루어져 공정별 검측시간과 작업시간이 많이 소요되었다.Typical mobile scaffold type bridges include one-stage scaffolding and external formwork setting and inspection; Assembly and installation of two-stage floor slab reinforcement, wall reinforcement and sheath pipe; 3-step internal formwork installation; Assembly and installation of four-stage upper slab rebar; Concrete finishing and curing after completion of the 5th step of camber adjustment; Tensioning the sixth internal strand; Step 7 Disassemble one set of rear piercing brackets and move them in the forward direction to install them in the piers; 8th stage preparation work for dismantling formwork; 9 steps of external formwork (1) dismantling work step; 10 steps to move the external formwork (1) and mobile non-pore equipment; 11 steps of disassembling the inner formwork and setting the outer formwork (1); The 12-step internal formwork (2) moving and setting work step was composed of 12-step process, it took a lot of detection time and work time by process.
철근의 조립·설치는 외부거푸집 설치 후 철근을 조립하는 방법과 기 시공된 교량 상면이나, 교량하부 공간에 3∼5m 단위로 복부와 하부플랜지 철근을 미리 배치시킨 철근지그장을 만들어 다음 시공구간에 크레인등으로 조립된 철근을 운반하여 외부거푸집 위에 배열시키고 최종철근을 배치하는 방법을 주로 사용하였다.Assembling and installing the reinforcing bar is done by assembling the reinforcing bar after installing the external formwork, and by making the reinforcing jig site in which the abdominal and lower flange rebars are arranged in 3 ~ 5m units on the upper surface of the bridge or under the bridge. The method of transporting reinforcing bars assembled with cranes and arranging them on the external formwork and arranging the final reinforcing bars was mainly used.
그러나, 철근을 3∼5m 간격으로 선조립하여 쓸 경우 쉬이스관 및 철근에 이음부가 많이 발생하며, 3∼5m 단위로 운반되어진 철근끼리의 연결을 위한 추가작업이 필요로 하게된다. 또한, 운반·설치공정 횟수의 증가 및 장비의 추가 소요로 인해 시공성 및 경제적 측면에서 불합리한 점이 있었다.However, when pre-assembled rebars are used at intervals of 3 to 5 m, many joints are generated in the case pipe and reinforcing bars, and additional work for connecting the rebars carried in units of 3 to 5 m is required. In addition, due to the increase in the number of transportation and installation processes and additional equipment, there were unreasonable points in terms of workability and economics.
특히 더블-티 교량의 경우 벽체 하단부의 폭이 좁아 거푸집 내에서의 직접적인 철근의 조립·설치가 어려우며, 이로 인해 시공성 저하와 공기증가의 요인으로 작용하였다.In particular, in the case of the double-tee bridge, the width of the lower part of the wall is narrow, making it difficult to assemble and install the reinforcing bar directly in the formwork.
또한 7단계 교각 브래킷(7)의 해체, 이동시와 11, 12단계 내부거푸집(2)의 해체 이동시에 별도의 장비를 이용하거나 이동장치와 레일을 미리 설치해야만 했다.In addition, the dismantling and moving of the seventh stage piercing bracket (7) and the dismantling and moving of the 11 and 12-stage inner formwork (2) had to use separate equipment or to install the moving device and the rail in advance.
상기와 같이 내부거푸집(2) 및 외부거푸집(1)을 별도로 운영함에 따른 소요공정의 추가로 작업공기가 증가하며, 중장비의 동원으로 인한 소요공기 및 공사비가 증가하였다. 또한, 선공정이 잘못되었을 경우 검측시간의 증가로 다른 공정을 진행할 수 없어 공기에 막대한 지장을 초래하였다.As described above, the additional work required for operating the internal formwork (2) and the external formwork (1) is increased, and the required air and construction costs are increased due to the mobilization of heavy equipment. In addition, when the pre-process is wrong, the increase of the detection time can not proceed with other processes, which causes enormous disruption to the air.
경간 단위로 철근을 선조립(Prefabrication)하여 설치하는 시스템과 외부거푸집(1)과 내부거푸집(2)을 동시이동하는 시스템 및 거푸집의 조립·설치시 종래의 중장비에 의존했던 작업을 자동화하는 시스템을 도입함으로서 시공성향상과 공사기간을 단축할 수 있는 시공방법을 제공함에 목적이 있다.A system for prefabricating and installing rebar in span units, a system for moving external formwork (1) and internal formwork (2) simultaneously, and a system for automating tasks that depended on conventional heavy equipment when assembling and installing formwork. The purpose is to provide construction methods that can improve construction performance and shorten construction period.
경간단위로 철근을 선조립하는 시스템은 기 타설된 교량상부의 철근 제작장에서 경간 단위로 철근 및 쉬이스관을 조립하는 단계와; 다음 경간 콘크리트 타설을 위해 설치되어 있는 비계보까지 교량상부에 설치된 문형크레인(11)의 호이스트(Hoist, 10)를 이용하여 철근을 리프팅한 후, 이동·설치하는 단계로 이루어지는 것을 특징으로 한다.A system for pre-assembling reinforcing bar by span unit includes assembling reinforcing bar and sheath pipe in span unit in reinforcing bar fabrication of other bridges; Next, after lifting the reinforcing bar using the hoist (Hoist, 10) of the door-shaped crane (11) installed on the bridge to the scaffold that is installed for the concrete placing, characterized in that the step consisting of moving and installing.
외부거푸집(1)과 내부거푸집(2)을 동시이동하는 시스템 및 거푸집의 조립·해체시 기계적 장비에 의한 시공자동화 시스템은 콘크리트 타설 후 메인잭을 이용하여 장비 전체를 하향으로 이동시켜 외부거푸집(1)과 내부거푸집(2)을 아래로 내리는 단계와; 내부거푸집(2)을 해체하기 위하여 거푸집에 고정된 버팀대(12)/턴버클(Turn buckle)(13)/핀(14)등을 제거하는 단계와; 내부거푸집(2)을 유압잭을 이용하여 자동으로 탈형시키고 탈형된 내부거푸집(2)을 가로보(4)에 거치시키는 단계와; 가로보(4) 연결부에 고정된 강봉을 제거한 다음, 가로보(4)에 부착된 유압잭을 이용하여 거푸집전체를 좌·우로 이동시키는 단계와; 교각브래킷(7)에 부착된 유압잭을 이용하여 비계보(5)와 거푸집전체를 자동으로 좌, 우측으로 벌려서 이동식 비계공장비의 이동준비를 완료하는 단계와; 교각브래킷(7)에 설치된 이동장치(6)를 이용하여 외부거푸집(1)과 내부거푸집(2)을 다음 경간으로 동시에 이동시킨다.The system that moves the external formwork (1) and the internal formwork (2) at the same time and the construction automation system by the mechanical equipment when assembling and disassembling the formwork moves the entire equipment downward by using the main jack after the concrete is placed. ) And lowering the inner formwork (2); Removing braces 12 / turn buckle 13 / pins 14, etc. fixed to the formwork to dismantle the inner formwork 2; Automatically demolding the internal formwork (2) using a hydraulic jack and mounting the demolded internal formwork (2) on the crossbeam (4); Removing the steel bar fixed to the crossbeam 4 and then moving the formwork whole to the left and right by using a hydraulic jack attached to the crossbeam 4; Automatically spreading the scaffold 5 and the formwork to the left and the right by using a hydraulic jack attached to the bridge bracket 7 to complete the preparation for moving the scaffolding equipment; The outer formwork 1 and the inner formwork 2 are simultaneously moved to the next span by using the moving device 6 installed on the bridge bracket 7.
도1은 본 발명의 하부지지형 이동식 비계공단면도1 is a cross-sectional bottom support mobile scaffolding of the present invention
도2은 본 발명에 의한 하부지지형 이동식 비계공 구성도Figure 2 is a bottom support type mobile scaffold configuration according to the present invention
도3은 본 발명에 의한 외부거푸집과 내부거푸집을 자동으로 해체하는 순서도Figure 3 is a flow chart for automatically dismantling the external formwork and the internal formwork according to the present invention
도4은 본 발명에 의한 철근지그장 정면도 및 측면도4 is a front view and a side view of a reinforcing jig seat according to the present invention;
도5은 본 발명에 의한 철근지그의 운반과 설치 순서도5 is a flow chart of the transportation and installation of the reinforcing jig according to the present invention.
도6은 본 발명에 의한 철근지그의 운반, 설치 단면도Figure 6 is a transport, installation cross section of the reinforcing jig according to the present invention
도7은 종래의 하부지지형 이동식 비계공 단면도Figure 7 is a cross-sectional view of a conventional lower support mobile scaffold
* 도면의 주요 부분에 대한 부호의 설명 *Explanation of symbols on the main parts of the drawings
1. 외부거푸집(Outer Form)1. Outer Form
2. 내부거푸집(Inner Form)2. Inner Form
3. 바닥거푸집(Bottom Form)3. Bottom Form
4. 가로보(Cross Beam)4. Cross Beam
5. 비계보(Box Girder, Truss Girder)5. Box Girder, Truss Girder
6. 이동장치(Moving Unit)6. Moving Unit
7. 교각 브래킷(Pier Bracket)7. Pier Bracket
8. 철근지그(Reinforcement Jig)8. Reinforcement Jig
9. 스프레더빔(Spreader Beam)9. Spreader Beam
10. 호이스트(Hoist)10. Hoist
11. 문형크레인(Gantry Crane)11.Gantry Crane
첨부한 도면, 도4은 본 발명에 의한 철근지그장 정면도 및 측면도이며, 도5은 본 발명에 의한 철근지그(8)의 운반과 설치 순서도이고, 도6은 본 발명에 의한 철근지그(8)의 운반, 설치 단면도이다.4 is a front view and a side view of a reinforcing jig seat according to the present invention, FIG. 5 is a flow chart of a rebar jig 8 according to the present invention, and FIG. 6 is a rebar jig 8 according to the present invention. ) Transport and installation cross section.
본 발명은 상기 도면에서 도시하는 바와 같이 레일(22)위에 철근지그장을 설치하여, 경간단위로 철근을 조립한 후 문형크레인(11)으로 철근지그(8)을 운반, 설치하는 형식으로 콘크리트 타설, 강연선 인장, 비계보(5), 교각 브래킷(7) 해체, 이동을 하는 동안 다음 경간의 철근을 미리 조립하는 방식이며 그 자세한 시공방법을 시계열적으로 기술하면 다음과 같다.The present invention is to install a reinforcing jig seat on the rail 22, as shown in the drawings, to assemble the reinforcement in the span unit, and then to cast the concrete in the form of transporting and installing the reinforcing jig 8 to the door-shaped crane (11) During the dismantling and movement of strand strands, scaffolds (5), and piercing brackets (7), the rebars of the next span are preassembled. The detailed construction method is as follows.
먼저 기 타설된 교량(23) 상부에 철근 지그 이동용 레일(22)을 설치한 후, 기 타설된 교량상부 중앙에 철근 지그장을 설치한다. 이 철근 지그장은 조립된 철근을 운반하기 위한 문형크레인(11)이 설치되어있으며, 설치된 철근 지그에 맞춰 경간 단위로 철근을 배근한 후 쉬이스관을 조립한다.First, the reinforcing jig movement rail 22 is installed on the other bridge 23, and then the reinforcing jig field is installed in the center of the other bridge. This reinforcing jig is installed door-type crane (11) for transporting the assembled reinforcing bar, and reinforce the bar by the span unit in accordance with the installed reinforcing jig to assemble the case pipe.
철근 및 쉬이스관의 조립이 완료되면 검측을 실시한 후, 지그 운반 준비를 한다. 이때, 레일(22) 상부에서 철근 지그(8) 상부 높이까지 이동로에 어떠한 간섭물도 있어서는 안되며, 레일(22) 사이 일정간격 유지 및 레일면이 고르게 유지될 수 있어야 한다. 또한, 철근 지그(8) 이동시 탈선방지장치 및 레일 끝단에 고정용 스토퍼를 설치하여 철근 지그(8)의 브레이크 고장시 레일 이탈을 방지할 수 있도록 한다.When the rebar and sheath pipe are assembled, the inspection is performed and the jig is prepared for transportation. At this time, there should not be any interference in the moving path from the upper rail 22 to the upper height of the reinforcing jig 8, it should be able to maintain a constant interval between the rail 22 and the rail surface evenly. In addition, when the reinforcing jig 8 is moved, a derailment preventing device and a fixing stopper may be installed at the rail end to prevent the rail from falling off when the rebar jig 8 breaks.
운반 준비가 끝나면 철근 지그(8)를 교량(23)상부에 설치된 문형크레인(11)의 호이스트(10)로 철근 지그내의 스프레더빔(9)에 체결하여 리프팅 한다. 리프팅된 철근 지그(8)를 셋팅된 이동식 비계공 거푸집(100)에 설치한다. 상기와 같은 반복 공정으로 시공성과 공사기간을 기존 방식에 비해 상당부분 단축시킬 수 있으며, 철근조립을 경간 단위로 시공함에 따라 철근 및 쉬이스관의 이음부를 최소화할 수 있어 교량의 시공품질향상을 통한 교량의 내구성 증진에도 기여한다.When the preparation for transportation is completed, the reinforcing jig 8 is fastened to the spreader beam 9 in the reinforcing jig by the hoist 10 of the door-shaped crane 11 installed on the bridge 23 and lifted. The lifted reinforcing jig 8 is installed in the set movable non-pore formwork 100. By repeating the above process, construction and construction period can be shortened considerably compared with the existing method, and the construction of reinforcing bars can be minimized by improving the construction quality of bridges. It also contributes to increased durability.
외부거푸집(1)과 내부거푸집(2)을 동시이동하는 시스템 및 거푸집의 조립·설치 작업을 자동화하는 시스템의 구성은 다음과 같다. 이하 첨부한 도면을 참조한 상세한 설명으로 본 발명의 구체적인 특징 및 이점은 더욱 명확해 질 것이다. 첨부한 도면, 도7은 기존의 하부지지형 이동식 비계공 단면도이고, 도1은 본 발명에 의한 하부지지형 이동식 비계공의 단면도이며, 도2는 본 발명에 의한 하부지지형 이동식비계공의 구성도이고, 도3은 본 발명에 의한 외부거푸집(1)과 내부거푸집(2)을 자동으로 해체하는 순서도이다.The configuration of the system for simultaneously moving the external formwork 1 and the internal formwork 2 and the system for automating the assembly and installation work of the formwork is as follows. Detailed features of the present invention will be more apparent from the following detailed description taken in conjunction with the accompanying drawings. 7 is a cross-sectional view of a conventional lower support mobile scaffold, FIG. 1 is a cross-sectional view of a lower support movable scaffold according to the present invention, FIG. 2 is a configuration diagram of a lower support movable scaffold according to the present invention, and FIG. It is a flow chart which automatically dismantles the external formwork 1 and the internal formwork 2 according to the present invention.
본 발명은 상기 도면에서 도시하는 바와 같이 비계보 상단에 설치된 가로보(4)에 바닥거푸집(3)을 설치하여 그 거푸집에 내부거푸집(2)까지 포함하는 2중거푸집 형태로 이루어져 이동식 비계공 장비 이동시 외부거푸집(1)과 내부거푸집(2)이 동시에 이동할 수 있으며 거푸집의 조립·해체시 기계적 장비에 의한 자동화 시스템으로 그 자세한 시공방법을 시계열적으로 기술하면 다음과 같다. 먼저 콘크리트 타설 후 메인잭을 이용하여 장비 전체를 하향으로 이동시켜 외부거푸집(1)과 내부거푸집(2)을 아래로 내린다. 내부거푸집(2)을 해체하기 위하여 거푸집에 고정된 버팀대(12)/턴버클(Turn buckle)(13)/핀(14)등을 제거한다. 그리고 내부거푸집(2)을 유압잭을 이용하여 자동으로 탈형시키고 탈형된 내부거푸집(2)을 가로보에 거치시킨다. 가로보(4) 연결부에 고정된 강봉을 제거한 다음, 가로보(4)에 부착된 유압잭을 이용하여 내,외부 및 바닥 거푸집(1)(2)(3)전체를 좌·우로 이동시킨다. 교각브래킷(7)에 부착된 유압잭을 이용하여 비계보(5)와 거푸집전체를 자동으로 좌, 우측으로 벌려서 이동식 비계공 장비의 이동준비를 마친다. 교각브래킷(7)에 설치된 이동장치(6)를 이용하여 외부거푸집(1)과 내부거푸집(2)을 다음 경간으로 동시에 이동시킨다. 이동식 비계공 장비 이동시 상기와 같은 반복 공정을 통해 작업성을 향상시키고 공기를 기존 방식에 비해 상당부분 단축시킬 수 있다.The present invention is installed in the form of the bottom formwork (3) on the horizontal beam (4) installed on the upper side of the scaffolding as shown in the figure consists of a double formwork including up to the inner formwork (2) to the outside when moving the mobile scaffolding equipment The formwork (1) and the internal formwork (2) can be moved at the same time, and the detailed construction method is described in time series as an automated system by mechanical equipment when assembling and disassembling the formwork. First, after placing concrete, the entire jack is moved downward by using the main jack to lower the external formwork (1) and the internal formwork (2). In order to dismantle the internal formwork (2), remove the brace (12) / turn buckle (13) / pin (14) fixed to the formwork. Then, the inner die 2 is automatically demolded using a hydraulic jack, and the demolded inner die 2 is mounted on the cross beam. After removing the steel bar fixed to the cross beam (4) connection portion, using the hydraulic jack attached to the cross beam (4) to move the entire inner, outer and bottom formwork (1) (2) (3) to the left and right. Using the hydraulic jack attached to the pier bracket (7) to open the scaffold (5) and the formwork whole automatically left and right to finish the movement of the mobile scaffolding equipment. The outer formwork 1 and the inner formwork 2 are simultaneously moved to the next span by using the moving device 6 installed on the bridge bracket 7. When the mobile non-pore equipment is moved, the repeatability process as described above can improve workability and significantly shorten the air compared to the conventional method.
이상의 명백한 설명과 같이 본 발명에 의한 이동식 비계공 더블-티 교량의 시공시 교량의 경간 단위로 철근을 선조립하여 설치하는 시스템과 외부거푸집과 내부거푸집을 동시이동 및 거푸집의 조립·해체시 기계적 장비에 의한 자동화 시스템의 도입은 이동식 비계공 장비의 효율적인 이용으로 작업인원과 중장비사용을 감소시킬 수 있으며, 또한 공사기간을 단축시킬 수 있고, 이를 통하여 시공성과 경제성을 향상시킬 수 있다.As described above, in the construction of a mobile non-porous double-tee bridge according to the present invention, a system for pre-assembling and installing reinforcing bars in the span unit of a bridge, and simultaneously moving and removing external formwork and internal formwork to mechanical equipment during assembly and disassembly of formwork The introduction of an automated system can reduce the number of workers and heavy equipment through efficient use of mobile non-machinery equipment, and also shorten the construction period, thereby improving construction and economic efficiency.
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