WO2021128161A1 - Procédé et appareil pour la construction intégrée et élevée de structure arquée - Google Patents

Procédé et appareil pour la construction intégrée et élevée de structure arquée Download PDF

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Publication number
WO2021128161A1
WO2021128161A1 PCT/CN2019/128684 CN2019128684W WO2021128161A1 WO 2021128161 A1 WO2021128161 A1 WO 2021128161A1 CN 2019128684 W CN2019128684 W CN 2019128684W WO 2021128161 A1 WO2021128161 A1 WO 2021128161A1
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WO
WIPO (PCT)
Prior art keywords
lifting
plate
arched
cable
hydraulic
Prior art date
Application number
PCT/CN2019/128684
Other languages
English (en)
Chinese (zh)
Inventor
王龙
梁湖清
魏崴
蓝戊己
陈臻颖
温建明
石开荣
曹嘉利
卢德辉
Original Assignee
广州建筑股份有限公司
上海业升机电控制技术有限公司
广州五羊建设机械有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 广州建筑股份有限公司, 上海业升机电控制技术有限公司, 广州五羊建设机械有限公司 filed Critical 广州建筑股份有限公司
Priority to CN201980059054.6A priority Critical patent/CN113454306B/zh
Priority to PCT/CN2019/128684 priority patent/WO2021128161A1/fr
Publication of WO2021128161A1 publication Critical patent/WO2021128161A1/fr

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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
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
    • E04G21/00—Preparing, conveying, or working-up building materials or building elements in situ; Other devices or measures for constructional work
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
    • E04G21/00—Preparing, conveying, or working-up building materials or building elements in situ; Other devices or measures for constructional work
    • E04G21/14—Conveying or assembling building elements

Definitions

  • the invention relates to a construction method for integral lifting, in particular to a device and construction method used for the integral lifting of an arched structure.
  • the purpose of the present invention is to provide a construction method for the overall improvement of the arched structure, which is reliable in quality, safe and economical, and has high construction efficiency.
  • the overall lifting construction method of the arched structure includes the following steps:
  • step (4) also includes
  • Commissioning inspection commissioning the hydraulic lifting system, checking whether the lifting structural unit and all temporary measures for hydraulic synchronous lifting meet the construction requirements;
  • Formal lifting After lifting the lifting unit by about 150mm, pause the lifting, fine-tune the elevation of each lifting point of the lifting unit to make it level, let it stand for 4-12 hours, and conduct a comprehensive inspection of the hydraulic lifting equipment system and structural system, and then Then lift the lifting structure to the lower support structure.
  • step (2) computer simulation is used to perform simulation analysis with the goal of no relative displacement at both ends of the lifted structure during the lifting process and no downward deflection of the lifted structure during the lifting process, to confirm that the lifting structure needs to be applied Temporary prestress.
  • the specification of the prestressed cable to be used is determined and the design of the tension end node and the anchor end node are carried out.
  • the tension end node and the anchor end node adopt an assembled design.
  • the tension end nodes and anchor end nodes corresponding to the multiple prestressed cables are set.
  • the tension end nodes applied to multiple prestressed cables include: at least two hydraulic tensioners, each of which is used to tension a bunch of prestressed cables; at least two end supports, each end bearing The member is used to support a hydraulic tensioner, and each of the end supporting members includes an end plate welded together, at least one horizontal stiffening plate and at least one vertical stiffening plate.
  • the end plate is provided with a cable hole, so The horizontal stiffening plate and the vertical stiffening plate are arranged on the end plate around the cable hole, the cable hole is used to pass through the pre-stressed cable, and the end bearing near the lifting structure is supported on and lifted
  • the two sets of shear plates are connected through the bottom string of the structure and are connected as a whole through upper and lower connecting angles.
  • the anchoring end nodes applied to multiple prestressed stay cables include: at least two bottom anchors for fixing the prestressed stay cables; at least two end supports, each of which is used to support a bottom anchor,
  • the end bearing includes end plates welded together, at least one horizontal stiffening plate and at least one vertical stiffening plate, the end plate is provided with a cable hole, and the horizontal stiffening plate and the vertical stiffening plate surround the A cable hole is provided on the end plate, the cable hole is used to pass through the prestressed cable, and two end supports are supported on two sets of shear plates that are connected through the lower string of the lifting structure, It is connected into a whole through upper and lower connecting angle steel;
  • the end bearing is provided with tooth grooves matching the shear plate on the vertical stiffening plate close to the lifting structure, and the shear plate is firmly buckled on the shear plate through the tooth grooves.
  • Each group of shear plates includes at least one shear plate.
  • the shear plate also includes a shear plate for reinforcing and connecting two adjacent end bearing members on the same side of the lifting structure.
  • the tension end node and anchor end node adopt assembly design, which are assembled and assembled on site.
  • the installation and disassembly are flexible and convenient, and have little impact on the original structure and appearance. It avoids the difficulty of conventional methods and has a greater impact on the original structure and appearance. Repair difficult shortcomings.
  • the required prestressed cable is a single prestressed cable
  • a tension end node and an anchor end node corresponding to the single prestressed cable are set.
  • the tension end node applied to a single prestressed cable includes: a hydraulic tensioner for tensioning the prestressed cable; an end bearing member for supporting the hydraulic tensioner, and the end bearing member It includes an end plate welded together, two clamping plates, two stiffening plates and a non-slip stiffening rib.
  • the end plate is provided with a cable hole, and the clamping plate and the stiffening plate are arranged around the cable hole.
  • the anti-slip stiffening rib is arranged on the end plate and welded to one of the clamping plates, and the cable hole is used to pass through the prestressed cable, and the clamping plate
  • the anchoring end node applied to a single prestressed cable includes: a connecting plate arranged on the lower wing plate of the lower chord of the lifting truss of the lifting structure; the end of the prestressed cable is provided with a locking clip, and the lock The clamp is connected to the connecting plate through a pin.
  • arched structure integral lifting construction method can accurately control the deformation of the arched structure during the lifting process, ensure the precise positioning of the structure lifting and the structural form before and after installation to meet the design requirements, and change the traditional arched structure Due to the sudden change in rigidity and large deformation before and after the installation and fixation of the support, the overall situation that the construction is difficult to implement is improved, and a large number of high-altitude operations are converted into ground operations; the temporary prestress application and removal are convenient for construction and have little impact on the original structure.
  • This construction method improves the environmental conditions of manual operations, reduces the source of danger, has a short construction period, high quality, and the construction process is safe and reliable, thereby saving construction time and costs as a whole.
  • Fig. 1 is a schematic diagram of the installation of an arched roof structure according to the first embodiment of the present invention
  • Fig. 2 is a schematic diagram of assembling the lifting structure on the ground according to the first embodiment of the present invention
  • FIG. 3 is a schematic diagram of the installation of the lifting structure according to the first embodiment of the present invention after being lifted into place;
  • Fig. 4 is a schematic diagram of a completed installation of the arched roof structure according to the first embodiment of the present invention.
  • FIG. 5 is a schematic diagram of the structure of a double-cable tension end node according to the first embodiment of the present invention.
  • FIG. 6 is a schematic diagram of the structure of the middle end bearing member of the double-cable tension end node according to the first embodiment of the present invention.
  • Fig. 7 is a schematic diagram of the structure of a double-cable anchored end node according to the first embodiment of the present invention.
  • FIG. 8 is a schematic diagram of the structure of a single-cable tension end node according to the second embodiment of the present invention.
  • FIG. 9 is a cross-sectional view of a single cable tension end node according to the second embodiment of the present invention.
  • FIG. 10 is a schematic diagram of the structure of the middle end bearing member of the single-cable tension end node according to the second embodiment of the present invention.
  • Fig. 11 is a schematic diagram of the structure of a single-cable anchored end node according to the second embodiment of the present invention.
  • the arched structure that requires overall lifting construction is the arched roof structure 2.
  • the arched roof structure 2 needs to be installed on the lower support structure 1.
  • the arched roof structure 2 includes the arched lifting structure 2-1 And the post-installation component 2-2 at the support.
  • the lifting structure 2-1 is assembled on the ground, and then lifted to the lower support structure 1, and then the post-installation component 2-2 at the support is installed to lift the structure 2-1 is installed on the lower support structure 1.
  • a tire frame 4 is set on the ground, and the arched lifting structure 2-1 is assembled on the tire frame 4.
  • a lifting frame 5 is built on the lower support structure 1, and a hydraulic synchronous lifting system 6 is set on the lifting frame 5.
  • the hydraulic synchronous lifting system 6 is connected to the lifting point 8 through the lifting steel strand 7, which is the lifting structure 2-1 Be prepared for the overall improvement.
  • step (2) it is necessary to calculate the required temporary prestress to confirm the required prestress cable setting.
  • the arch structure span of the arched roof used is 60 meters
  • the spacing between the main trusses is 6 meters
  • the section height of the main truss is 2.5 meters
  • the ratio of rise to span is 1/10
  • the upper and lower chords are square tubes.
  • the web rod adopts square tube ⁇ 110 ⁇ 5
  • the material is Q345B
  • the roof panel adopts 50mm thick sandwich color steel plate.
  • the rigidity of the lifted structure changes greatly compared with the designed state, resulting in a large mid-span deflection of 374mm, and a relatively large level at both ends of the structure. Deformation, relative elongation of 240mm, the overall lifting is difficult to install accurately in place.
  • the rigidity of the lifting structure 2-1 can be effectively controlled, and the deformation and shape of the lifting structure 2-1 during the lifting process can be adjusted and controlled.
  • an initial tension of 239kN is applied to the lifting structure 2-1.
  • the two ends of the lifting structure 2-1 are relatively contracted by 14mm; the temporary prestressing cable 4 is anchored, and the lifting structure 2- 1 During the overall lifting process, the two ends are relatively elongated by 14mm.
  • the relative deformation of the two ends of the lifting structure 2-1 is zero, and the mid-span deflection is 25mm, which meets the requirements of installation accuracy and design.
  • the lifting structure 2-1 When the initial tension of 267kN is applied to the lifting structure 2-1, when the pre-stress tension is completed, the lifting structure 2-1 just separates from the tire frame, the mid-span deflection during the lifting process is zero, and the two ends of the structure no longer have relative deformation. , The relative shrinkage of the two ends of the lifting structure 2-1 when it is lifted in place is 17mm, which meets the requirements of installation accuracy and design requirements.
  • the high-strength and low-relaxation prestressed steel strands have a stress ratio of 0.47 ⁇ 0.52.
  • the tensioning and anchoring of the temporary prestressing force cable 3 is performed by a hydraulic tensioner.
  • the structure of the tension end node 9 is shown in Fig. 5.
  • the hydraulic tensioner 9-1 used to tension the two prestressed cables 3 is supported on the end support 9-2, and the two end supports 9-2
  • the upper and lower connecting angles 9-41 and 9-42 are connected as a whole and supported on the shear plate 9-3.
  • the shear plate 9-3 adopts a through-type connection and the lower chord 9- of the lifting structure 2-1 6 Weld and connect together, and the size of shear plate 9-3 is determined by calculation.
  • the two end bearing pieces 9-2 are connected with the upper and lower connecting angle steels 9-41 and 9-42 through high-strength bolts.
  • the end bearing 9-2 is assembled by welding and assembled end plates 9-21, horizontal stiffening plates 9-22, vertical stiffening plates 9-23 and 9-24, as shown in FIG. 6. Wherein, the end plate 9-21 is provided with a threading hole 9-25, and a connecting bolt hole 9-26 is provided at an appropriate position.
  • the end bearing 9-2 is close to the vertical stiffening plate 9-24 of the lower chord 9-6 of the lifting structure, and a tooth groove matching the shear plate 9-3 is set on the vertical stiffening plate 9-24, which can be firmly buckled and hung on the shear plate. 9-3.
  • the structure of the anchored end node 10 is shown in Fig. 7, the temporary prestressed cable 3 is anchored and fixed by the bottom anchor 10-1, the bottom anchor 10-1 is supported on the end support 10-2, and the two end supports 10-2
  • the upper and lower connecting angle steels 10-41 and 10-42 are connected as a whole and supported on the shear plate 10-3.
  • the end bearing 10-2, upper and lower connecting angles 10-41 and 10-42, the specifications and connection mode of the shear plate 10-3 are the same as those of the end bearing 9-2, upper and lower connecting angles 9-41 Same as 9-42, shear plate 9-3.
  • the arched structure that requires overall lifting construction is the arched roof structure 2.
  • the arched roof structure 2 needs to be installed on the lower support structure 1.
  • the arched roof structure 2 includes the arched lifting structure 2-1 And the post-installation component 2-2 at the support.
  • the lifting structure 2-1 is assembled on the ground, and then lifted to the lower support structure 1, and then the post-installation component 2-2 at the support is installed to lift the structure 2-1 is installed on the lower support structure 1.
  • a tire frame 4 is set on the ground, and the arched lifting structure 2-1 is assembled on the tire frame 4.
  • the pre-stressed cables 3 are bundled at both ends of the lifting structure 2-1, and temporary pre-stress is applied, and the temporary pre-stressed cables 3 are stretched to the control value, and the lifting structure 2-1 Set up the lifting point 8.
  • a lifting frame 5 is built on the lower support structure 1, and a hydraulic synchronous lifting system 6 is set on the lifting frame 5.
  • the hydraulic synchronous lifting system 6 is connected to the lifting point 8 through the lifting steel strand 7, which is the lifting structure 2-1 Be prepared for the overall improvement.
  • step (2) calculate the required temporary prestress. If the required temporary prestress is small, only a single prestressed steel strand is required, and then the corresponding tension end node 9'and anchor end node 10' are performed. the design of.
  • the end bearing 9'-2 is assembled by welding of end plates 9'-21, clamping plates 9'-22, 9'-23, stiffening plates 9'-24, and non-slip stiffening ribs 9'-25, such as Shown in Figure 10.
  • the end plate 9'-21 has holes for the temporary auxiliary pre-stressed cable 3 to pass through, and the ends of the clamping plates 9'-22 and 9'-23 are provided to match the lower chord 9-6 of the lifting truss Concave card slot.
  • the anchoring end node of the single-cable temporary auxiliary prestressed cable 3 is shown in Fig. 11.
  • the temporary auxiliary pre-stressed cable 3 uses the locking clip 10'-1 provided at the end to pass through the pin and the connecting plate 10'-2 provided at the bottom of the lower chord of the lifting truss.

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  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Conveying And Assembling Of Building Elements In Situ (AREA)

Abstract

L'invention concerne un procédé pour la construction intégrée et élevée d'une structure arquée, comprenant les étapes suivantes : la division d'une structure arquée en une structure élevée arquée et un élément de post-assemblage au niveau d'une base de support, la fourniture d'un gabarit sur le sol, et l'achèvement de l'assemblage de la structure élevée sur le gabarit ; le filetage et la retenue d'une ligne de traînée de précontrainte aux deux extrémités de la structure élevée et l'application d'une force de précontrainte temporaire ; l'utilisation d'un système de levage synchronisé hydraulique pour soulever la structure élevée à l'emplacement d'une structure de support inférieure devant être montée, le montage de l'élément de post-assemblage au niveau de la base de support, et la connexion de la structure élevée et de la structure de support inférieure à un corps intégré. L'invention concerne également un nœud d'extrémité de tension assemblé et un nœud d'extrémité d'ancrage utilisés pour enfiler et retenir des lignes de traînée de précontrainte et pour tendre. La présente invention peut commander avec précision la déformation de la structure arquée pendant le levage, garantissant ainsi un positionnement précis de levage de structure et garantissant que la forme de structure avant et après le montage répond aux exigences de conception ; en même temps, l'application et l'élimination d'une force de précontrainte temporaire pour la construction sont commodes, et l'impact sur la structure d'origine est faible.
PCT/CN2019/128684 2019-12-26 2019-12-26 Procédé et appareil pour la construction intégrée et élevée de structure arquée WO2021128161A1 (fr)

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Application Number Priority Date Filing Date Title
CN201980059054.6A CN113454306B (zh) 2019-12-26 2019-12-26 一种拱形结构整体提升施工方法及装置
PCT/CN2019/128684 WO2021128161A1 (fr) 2019-12-26 2019-12-26 Procédé et appareil pour la construction intégrée et élevée de structure arquée

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PCT/CN2019/128684 WO2021128161A1 (fr) 2019-12-26 2019-12-26 Procédé et appareil pour la construction intégrée et élevée de structure arquée

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CN113550598A (zh) * 2021-07-13 2021-10-26 中国二十二冶集团有限公司 一种大跨度钢桁架分段安装的校正方法
CN113738125A (zh) * 2021-10-14 2021-12-03 中铁六局集团有限公司 一种线正下式站房有限空间大跨度钢结构提升施工工法
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CN113914620A (zh) * 2021-11-11 2022-01-11 防城港中一重工有限公司 一种整体降落筒仓滑模平台的方法
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CN113550598A (zh) * 2021-07-13 2021-10-26 中国二十二冶集团有限公司 一种大跨度钢桁架分段安装的校正方法
CN113431346A (zh) * 2021-07-29 2021-09-24 中建科工集团有限公司 一种用于大跨度钢桁架施工滑移胎架及施工方法
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CN113931455A (zh) * 2021-09-30 2022-01-14 中冶(上海)钢结构科技有限公司 一种基于新型固定端设施的索张拉方法
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