CN110777667A - Hoisting method for preventing deformation of steel pipe arch - Google Patents

Hoisting method for preventing deformation of steel pipe arch Download PDF

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Publication number
CN110777667A
CN110777667A CN201911110002.5A CN201911110002A CN110777667A CN 110777667 A CN110777667 A CN 110777667A CN 201911110002 A CN201911110002 A CN 201911110002A CN 110777667 A CN110777667 A CN 110777667A
Authority
CN
China
Prior art keywords
arch
steel pipe
lug
lifting
pulling
Prior art date
Legal status (The legal status 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 status listed.)
Pending
Application number
CN201911110002.5A
Other languages
Chinese (zh)
Inventor
闫春勇
任历文
朱张毅
胡德利
左晴雯
郭小伟
张恒
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Zhongtie No8 Bureau Group Co Ltd
First Engineering Co Ltd
China Railway Eighth Engineering Co Ltd
Original Assignee
Zhongtie No8 Bureau Group Co Ltd
First Engineering Co Ltd
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 Zhongtie No8 Bureau Group Co Ltd, First Engineering Co Ltd filed Critical Zhongtie No8 Bureau Group Co Ltd
Priority to CN201911110002.5A priority Critical patent/CN110777667A/en
Publication of CN110777667A publication Critical patent/CN110777667A/en
Pending legal-status Critical Current

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Classifications

    • EFIXED CONSTRUCTIONS
    • E01CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01DCONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
    • E01D21/00Methods or apparatus specially adapted for erecting or assembling bridges

Abstract

The invention relates to a hoisting method for preventing deformation of a steel pipe arch, which is characterized by comprising the following steps of: firstly, assembling pull lugs; secondly, mounting pull lugs; thirdly, the tension steel strand bundle is penetrated through the tension lug; fourthly, attaching a stress-strain observation sheet on the steel pipe arch; fifthly, mounting lifting lugs and lifting brackets; and sixthly, lifting the counter-pulling steel pipe arch. The invention can effectively prevent the axis of the steel pipe arch from changing in the hoisting process and ensure the installation closure of the steel pipe arch.

Description

Hoisting method for preventing deformation of steel pipe arch
Technical Field
The invention relates to bridge construction, in particular to a hoisting method for preventing a steel pipe arch from deforming.
Background
In recent years, the development of steel tube arch application is fast, and a plurality of large-span bridges are designed by adopting a steel tube arch technology. When the large-span bridge is constructed on a river channel, the large-span bridge is limited by a site, and a segmental assembling mode, namely an edge arch in-situ assembling mode and a middle arch closure synchronous lifting mode, is adopted. During lifting, the steel pipe arch is prevented from deforming, so that the work of lifting the steel pipe arch can be efficiently and safely finished by selecting reasonable equipment and a reasonable construction method.
CN 104404887a discloses a "support-free hoisting process for a large-span steel tube arch bridge", the constructed large-span steel tube arch bridge is a tied arch bridge erected on a river channel, and the upper structure of the bridge comprises an arch rib and a tie bar connected between two arch legs of the arch rib, and a stiff skeleton is arranged in the tie bar; the bracket-free hoisting process of the span steel pipe arch bridge is as follows: firstly, land assembly of single arch rib and tie bar stiff frameworks: assembling the arch-shaped steel pipe supports and the stiff frameworks of the arch ribs on an assembling field on one bank side of the river channel to obtain an assembled and molded upper steel structure of the single-piece bridge; secondly, integrally hoisting and positioning the single arch rib and the tie bar stiff framework: and hoisting and transferring the assembled single-piece bridge upper steel structure to a bridge lower supporting structure by adopting a floating crane displacement platform. The method has the advantages of simple process steps, reasonable design, convenient construction and good construction effect, can simply, conveniently and quickly finish the bracket-free hoisting construction process of the large-span steel pipe arch bridge, and has safe and reliable hoisting process.
CN203411910U discloses "steel pipe arch rib is hoist and mount with detaining system", including the earth anchor, the earth anchor left side is connected with the support through the nut, installs hydraulic jack on the support, and the earth anchor middle part is equipped with the stretch-draw groove, and the stretch-draw inslot has inserted the stretch-draw pole, and the stretch-draw pole right-hand member is connected with first steel strand wires through first connector, and first steel strand wires right-hand member is connected with the second steel strand wires through the second connector, and the second steel strand wires right-hand member is connected with the jack rope through the third connector. Its structural design is reasonable, simple to operate, connects many steel strands and can satisfy the tensile stress requirement to interim consolidation thing, closes the dragon in-process, can guarantee that steel strands atress and atress are even simultaneously, and the extension of each steel strand is unanimous with the deformation, has guaranteed that the arch axis of steel pipe arch rib is linear, avoids the uneven atress that draws the messenger partially.
The above prior art is a useful attempt in the art,
object of the Invention
The invention aims to provide a hoisting method for preventing a steel pipe arch from deforming, which can effectively prevent the axis of the steel pipe arch from changing in the hoisting process and ensure the installation closure of the steel pipe arch.
The invention relates to a hoisting method for preventing deformation of a steel pipe arch, which is characterized by comprising the following steps of:
firstly, assembling pull lugs;
the adopted pull lugs comprise a left pull lug and a right pull lug, and the pull lugs are assembled on a flat field;
one end of the left pulling lug is provided with an anchor, the left pulling lug is hinged with the anchor through a left pin shaft, and the anchor can rotate;
one end of the right pull lug is provided with a tensioning jack, the right pull lug is hinged with the tensioning jack through a right pin shaft, and the tensioning jack can also rotate;
secondly, mounting pull lugs;
a support frame support is arranged below the middle part of the steel pipe arch, the left arch springing of the steel pipe arch is arranged on the left platform, the right arch springing is arranged on the right platform, and annular stiffening plates are respectively arranged at the positions of the left arch springing and the right arch springing of the steel pipe arch; fixedly connecting a left pull lug to a left arch springing of the steel pipe arch and fixedly connecting a right pull lug to a right arch springing of the steel pipe arch respectively by using a 100T crane and CO2 gas shielded welding;
thirdly, the tension steel strand bundle is penetrated through the tension lug;
steel strands are arranged on the left pulling lug and the right pulling lug in a penetrating mode, and the steel strands are manually penetrated; the steel strand of the winding steel strand disk adopts 1860Mpa high-strength low-relaxation steel strand;
fourthly, attaching a stress-strain observation sheet on the steel pipe arch;
attaching a stress strain gauge to the highest position in the middle of the steel pipe arch, and observing the axial line change of the steel pipe arch during tensioning;
fifthly, mounting lifting lugs and lifting brackets;
welding a left lifting lug and a right lifting lug on the left arch springing and the right arch springing of the steel pipe arch at the positions corresponding to the left pulling lug and the right pulling lug respectively; a left lifting support and a right lifting support are respectively arranged on a left arch springing and a right arch springing of the steel pipe arch; lifting devices are arranged at the tops of the left lifting support and the right lifting support and are respectively connected with the left lifting lug and the right lifting lug through steel ropes;
sixthly, lifting the counter-pulling steel pipe arch;
when the steel pipe arch is lifted, the lifting device and the tensioning jack on the right pulling lug are simultaneously started, the opposite pulling and the lifting are alternately carried out, and the vertical lifting force is kept to be basically equal to the opposite pulling force.
Further, the tensioning jack is loaded step by step according to 10%, and the vertical lifting force and the counter-pulling force are kept to be basically equal.
The invention has the beneficial effects that:
the invention overcomes the tension generated in the hoisting process by providing a prestress for the steel pipe arch, thereby preventing the axis of the steel pipe arch from deforming during hoisting; the mode of pulling through synchronous lifting is adopted, the axis of the steel pipe arch is not changed in the hoisting process, and the guarantee is provided for the installation closure construction of the steel pipe arch effectively.
Drawings
FIG. 1 is a schematic structural view of a left pull tab;
FIG. 2 is a schematic structural view of a right-hand pull tab;
FIG. 3 is a schematic view of a left pull lug and a right pull lug fixedly connected to the lower sides of a left arch and a right arch of a steel pipe arch respectively;
FIG. 4 is a schematic view of a tension steel strand inserted between a left tension lug and a right tension lug;
FIG. 5 is a schematic view of a steel pipe arch with a stress strain gage attached to the top;
fig. 6 is a schematic view of a lifting counter-drawn steel tube arch.
In the figure:
1-a steel pipe arch, 11-a support frame, 12-a left platform, 13-a right platform, 14-a left lifting lug, 15-a right lifting lug, 16-a left lifting support and 17-a right lifting support;
2-left pull lug, 20-left pin shaft, 21-anchor device;
3-right pull lug, 30-right pin shaft, 31-tension top;
4-steel strand wires;
5-stress strain gauge;
6-100T crane;
7-steel strand wire wheel disc.
Detailed Description
The invention will be further described with reference to the accompanying drawings.
Referring to fig. 1 to 6, the hoisting method for preventing the deformation of the steel pipe arch is characterized by comprising the following steps:
firstly, assembling pull lugs;
the adopted pull lugs comprise a left pull lug 2 and a right pull lug 3, and the pull lugs are assembled on a flat field;
one end of the left pulling lug 2 is provided with an anchorage device 21, the left pulling lug 2 is hinged with the anchorage device 21 through a left pin shaft 20, and the anchorage device 21 can rotate;
one end of the right pull lug 3 is provided with a tensioning jack 31, the right pull lug 3 is hinged with the tensioning jack 31 through a right pin shaft 30, and the tensioning jack 31 can also rotate;
secondly, mounting pull lugs;
a support frame 11 is arranged below the middle part of a steel pipe arch 1 for supporting, a left arch springing of the steel pipe arch 1 is arranged on a left platform 12, a right arch springing is arranged on a right platform 13, and annular stiffening plates are respectively arranged at the positions of the left arch springing and the right arch springing of the steel pipe arch 1 for reinforcing a pulling stress point and preventing the steel pipe arch from deforming during tensioning; fixedly connecting a left pull lug 2 to a left arch springing of the steel pipe arch 1 and fixedly connecting a right pull lug 3 to a right arch springing of the steel pipe arch 1 respectively by using a 100T crane 6 and CO2 gas shielded welding;
thirdly, the tension steel strand bundle is penetrated through the tension lug;
the left pulling lug 2 and the right pulling lug 3 are penetrated with steel strands 4 in a manual bundle penetrating mode; the steel strand 4 wound on the steel strand disc 7 adopts 1860Mpa high-strength low-relaxation steel strand; two bundles of steel strands are penetrated through each midspan steel pipe arch, and each bundle of steel strands is nineteen steel wires;
fourthly, attaching a stress-strain observation sheet on the steel pipe arch;
attaching a stress strain gauge 5 to the highest position in the middle of the steel pipe arch 1 for observing the axial line change of the steel pipe arch during tensioning;
fifthly, mounting lifting lugs and lifting brackets;
welding a left lifting lug 14 and a right lifting lug 15 on the upper surfaces of the left arch springing and the right arch springing of the steel pipe arch 1 corresponding to the left pulling lug 2 and the right pulling lug 3 respectively; a left lifting bracket 16 and a right lifting bracket 17 are respectively arranged on the left arch springing and the right arch springing of the steel pipe arch 1; lifting devices are arranged at the tops of the left lifting support 16 and the right lifting support 17 and are respectively connected with the left lifting lug 14 and the right lifting lug 15 through steel ropes;
sixthly, lifting the counter-pulling steel pipe arch;
when the steel pipe arch 1 is lifted, the lifting device and the tensioning jack 31 on the right pulling lug 3 are simultaneously started, the opposite pulling and the lifting are alternately carried out, and the vertical lifting force and the opposite pulling force are basically equal. So as to prevent the hoisting deformation of the steel pipe arch.
The tensioning jack 31 is loaded step by step according to 10% and keeps the vertical lifting force and the counter-pulling force basically equal.

Claims (2)

1. A hoisting method for preventing deformation of a steel pipe arch is characterized by comprising the following steps:
firstly, assembling pull lugs;
the adopted pull lugs comprise a left pull lug (2) and a right pull lug (3), and the assembly of the pull lugs is carried out on a flat field;
one end of the left pulling lug (2) is provided with an anchor (21), the left pulling lug (2) is hinged with the anchor (21) through a left pin shaft (20), and the anchor (21) can rotate;
one end of the right pull lug (3) is provided with a tensioning roof (31), the right pull lug (3) is hinged with the tensioning roof (31) through a right pin shaft (30), and the tensioning roof (31) can also rotate;
secondly, mounting pull lugs;
a support frame (11) is arranged below the middle part of the steel pipe arch (1) for supporting, a left arch springing of the steel pipe arch (1) is arranged on a left platform (12), a right arch springing is arranged on a right platform (13), and annular stiffening plates are respectively arranged at the positions of the left arch springing and the right arch springing of the steel pipe arch (1); fixedly connecting a left pull lug (2) to a left arch foot of the steel pipe arch (1) and fixedly connecting a right pull lug (3) to a right arch foot of the steel pipe arch (1) by using a 100T crane (6) and CO2 gas shielded welding respectively;
thirdly, the tension steel strand bundle is penetrated through the tension lug;
steel strands (4) penetrate through the left pulling lug (2) and the right pulling lug (3) and are manually penetrated; the steel strand (4) of the winding steel strand coil (7) adopts 1860Mpa high-strength low-relaxation steel strand; fourthly, attaching a stress-strain observation sheet on the steel pipe arch;
attaching a stress strain gauge (5) to the highest position in the middle of the steel pipe arch (1) for observing the axial line change of the steel pipe arch during tensioning;
fifthly, mounting lifting lugs and lifting brackets;
welding a left lifting lug (14) and a right lifting lug (15) on the upper surfaces of the left arch springing and the right arch springing of the steel pipe arch (1) and corresponding to the left pulling lug (2) and the right pulling lug (3) respectively; a left lifting bracket (16) and a right lifting bracket (17) are respectively arranged on the left arch springing and the right arch springing of the steel pipe arch (1); lifting devices are arranged at the tops of the left lifting support (16) and the right lifting support (17), and the two lifting devices are respectively connected with the left lifting lug (14) and the right lifting lug (15) through steel ropes;
sixthly, lifting the counter-pulling steel pipe arch;
when the steel pipe arch (1) is lifted, the lifting device and the tensioning jack (31) on the right pulling lug (3) are simultaneously started, opposite pulling and lifting are alternately carried out, opposite pulling is gradually loaded according to 10%, and the vertical lifting force is kept to be basically equal to the pulling force.
2. The hoisting method for preventing the deformation of the steel pipe arch as claimed in claim 1, wherein the hoisting method comprises the following steps: the tensioning jack (31) is loaded step by step according to 10% and keeps the vertical lifting force and the counter-pulling force basically equal.
CN201911110002.5A 2019-11-14 2019-11-14 Hoisting method for preventing deformation of steel pipe arch Pending CN110777667A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201911110002.5A CN110777667A (en) 2019-11-14 2019-11-14 Hoisting method for preventing deformation of steel pipe arch

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201911110002.5A CN110777667A (en) 2019-11-14 2019-11-14 Hoisting method for preventing deformation of steel pipe arch

Publications (1)

Publication Number Publication Date
CN110777667A true CN110777667A (en) 2020-02-11

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Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101122114A (en) * 2007-09-14 2008-02-13 中铁大桥局集团第五工程有限公司 Back-cable-free cable-stayed bridge steel tower vertical turn construction method
CN101935987A (en) * 2010-08-27 2011-01-05 中交一公局桥隧工程有限公司 Construction method for integrally sliding large-span steel pipe arch of curved bridge
CN202380403U (en) * 2011-12-13 2012-08-15 广东省公路勘察规划设计院股份有限公司 Integral hoisting system of arch rib of arch bridge
CN104562936A (en) * 2014-12-08 2015-04-29 中铁六局集团有限公司 Construction method for continuous tie bar steel tube arch bridge
JP2016023523A (en) * 2014-07-24 2016-02-08 株式会社Ihiインフラシステム Construction method for arch bridge
CN207919363U (en) * 2017-12-21 2018-09-28 中铁广州工程局集团有限公司 A kind of Filled Steel Tubular Arch Bridge low level assembly lifting system
CN208150771U (en) * 2018-03-12 2018-11-27 中铁上海工程局集团有限公司 A kind of introversion formula steel case arch rib entirety winding level restraint device
CN109914266A (en) * 2019-04-17 2019-06-21 中交路桥建设有限公司 A kind of Large Steel pipeline overhead lifting vertical shift and promote construction method of installation
CN110205938A (en) * 2019-05-30 2019-09-06 中铁四局集团第二工程有限公司 The tubular arch installation method of base-supporting beam-arch composition bridge

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101122114A (en) * 2007-09-14 2008-02-13 中铁大桥局集团第五工程有限公司 Back-cable-free cable-stayed bridge steel tower vertical turn construction method
CN101935987A (en) * 2010-08-27 2011-01-05 中交一公局桥隧工程有限公司 Construction method for integrally sliding large-span steel pipe arch of curved bridge
CN202380403U (en) * 2011-12-13 2012-08-15 广东省公路勘察规划设计院股份有限公司 Integral hoisting system of arch rib of arch bridge
JP2016023523A (en) * 2014-07-24 2016-02-08 株式会社Ihiインフラシステム Construction method for arch bridge
CN104562936A (en) * 2014-12-08 2015-04-29 中铁六局集团有限公司 Construction method for continuous tie bar steel tube arch bridge
CN207919363U (en) * 2017-12-21 2018-09-28 中铁广州工程局集团有限公司 A kind of Filled Steel Tubular Arch Bridge low level assembly lifting system
CN208150771U (en) * 2018-03-12 2018-11-27 中铁上海工程局集团有限公司 A kind of introversion formula steel case arch rib entirety winding level restraint device
CN109914266A (en) * 2019-04-17 2019-06-21 中交路桥建设有限公司 A kind of Large Steel pipeline overhead lifting vertical shift and promote construction method of installation
CN110205938A (en) * 2019-05-30 2019-09-06 中铁四局集团第二工程有限公司 The tubular arch installation method of base-supporting beam-arch composition bridge

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