CN102168405A - Construction method of steel-concrete mixed Y-shaped tower of low-pylon cable-stayed bridge - Google Patents

Construction method of steel-concrete mixed Y-shaped tower of low-pylon cable-stayed bridge Download PDF

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Publication number
CN102168405A
CN102168405A CN 201110065318 CN201110065318A CN102168405A CN 102168405 A CN102168405 A CN 102168405A CN 201110065318 CN201110065318 CN 201110065318 CN 201110065318 A CN201110065318 A CN 201110065318A CN 102168405 A CN102168405 A CN 102168405A
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China
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anchor box
steel anchor
lift
construction
sections
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CN 201110065318
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Chinese (zh)
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CN102168405B (en
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危接来
杨寿忠
赵志军
潘波
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重庆城建控股(集团)有限责任公司
重庆建工集团股份有限公司
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Priority to CN 201110065318 priority Critical patent/CN102168405B/en
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Abstract

The invention discloses a construction method of a steel-concrete mixed Y-shaped tower of a low-pylon cable-stayed bridge. The invention relates to the construction method of architectural details of a bridge structure, also relates to a lifting device used in the construction method, and aims at solving the problems of waste and the like caused by adoption of a super-tonnage tower crane in the prior art. The construction method comprises the following steps of: manufacturing a segment steel anchor box, and arranging a rod piece support lifting system on a girder at the root part of a pylon of the Y-shaped tower; lifting and fixing the segment steel anchor box by using the rod piece support lifting system, and carrying out concrete construction on the segment steel anchor box after lifting and fixing; and removing the rod piece support lifting system. Compared with the prior art, the rod piece support lifting system is adopted for lifting the steel box girder so that the waste caused by usage of the super-tonnage tower crane is avoided, and the construction method has extremely strong adaptability and flexibility.

Description

Low-pylon cable-stayed bridge steel reinforced concrete mixing Y shape tower construction
Technical field
The present invention relates to a kind of construction of bridge construction architectural detail, also relate to the lifting appliance that uses in this worker's method.
Background technology
In the long-span bridge beam, the form that its pier (or tower) post mainly adopted in the past is a H shape.Along with the development of bridge construction technology, particularly the configuration design of the especially big bridge in city and environmental harmony have become the developing direction of Urban Bridge, and pier (or tower) design at present also might be selected A font, herringbone, Y font, the shape of falling Y form of structure for use.On the one hand, these structures have increased the aesthetic feeling of building, and have also increased difficulty of construction on the other hand.
In at present typical worker's method, the cable stayed bridge steel work adopts the super-tonnage tower crane to lift by crane installation with concrete structure mixing leaning tower more, but because the particularity of lifting appliance, super-tonnage tower crane not only cost is high, and on the market seldom, especially at head tower sections negligible amounts, the head tower that the flare angle is big adopts many super-tonnage tower cranes just to seem and very wastes.And common mast or gin-pole truck use more generally on the primary structural component lifting construction, and crane capacity is little, is not suitable for work high above the ground.
Summary of the invention
The invention is intended to provide a kind of low-pylon cable-stayed bridge steel reinforced concrete mixing Y shape tower construction, to solve the problems such as waste because of adopting the super-tonnage tower crane to bring in existing worker's method.
Purpose of the present invention can reach by following measure: the low-pylon cable-stayed bridge steel reinforced concrete mixing Y shape tower construction in this programme is characterized in that may further comprise the steps:
(1) makes the sections steel anchor box, on the girder of Y shape tower upper king-post strut root, establish rod member support Lift-on/Lift-off System simultaneously;
(2) lifting of using described rod member support Lift-on/Lift-off System to carry out the sections steel anchor box is fixed, and carries out concrete construction to lifting the sections steel anchor box of fixedly finishing;
(3) dismounting of rod member support Lift-on/Lift-off System.
The characteristics of technique scheme are: different with prior art employing super-tonnage tower crane is to have adopted the rod member support
Lift-on/Lift-off System carries out the lifting of steel case beam, just can built by common universal rod body, waste on the resource of having avoided using the large-tonnage tower crane and having brought, have very strong compliance and flexibility, the society and economy benefit is obvious, have broad application prospects, be applicable to the short leaning tower construction of cable stayed bridge steel work and concrete structure.
Further, in described step (1): being manufactured on the steel platform of the member of sections steel anchor box carried out, and the manufacturing of the member of described sections steel anchor box may further comprise the steps: anchor structure is assorted in the sections steel anchor box body; Described anchor structure and sections steel anchor box body and suspension cable sleeve pipe whole assorted, it is assorted in advance to carry out the sections steel anchor box then on the steel platform.The sections steel anchor box is made in the place of standard can be to guarantee welding quality, particularly thick plates quality and outward appearance physical dimension.Carry out on the steel platform that pre-assembly unit can guarantee that the sections steel anchor box is linear, the accurate contraposition of keyhole and total quality.
Further, in described step (3): before the lifting of sections steel anchor box, earlier rod member support Lift-on/Lift-off System is lifted loading test in advance.Described pre-lifting loading test can be checked operability, the stability of rod member support Lift-on/Lift-off System, the reliability of hoist engine brake in the rod member support Lift-on/Lift-off System, the balance of load, the safety of suspension centre colligation, the various security factors such as distortion situation of measuring rod member support Lift-on/Lift-off System simultaneously whether in the scope that design allows, the safety when above-mentioned inspection is confirmed can guarantee formally to use after errorless.
Further, in described step (3): in hoisting process first, after first sections steel anchor box rises and winches to shaped steel platform calibration position installation in position, use chain block to hang or jack is finely tuned first sections steel anchor box and accurately located, measure axis, plan-position and the elevation of first sections steel anchor box then, after design and monitored instruction requirement are satisfied in described measurement, locking-typed steel bracket and sections steel anchor box bottom flap are installed;
In the hoisting process of the sections steel anchor box after described lifting first, when lifting N sections steel anchor box, carry out being located by connecting between N sections steel anchor box and the N-1 sections steel anchor box simultaneously, when N is odd number, promptly carry out the upper king-post strut concrete construction of N-1 sections steel anchor box height, after the lifting of minor details section steel anchor box is fixing, promptly carry out the upper king-post strut concrete construction of minor details section steel anchor box height.
Described N is the numbering of sections steel anchor box erection sequence, and described N is since 1 number consecutively.Illustrate below: after the first sections steel anchor box (being first sections steel anchor box) lifting is fixing, lift the second sections steel anchor box and itself and the first sections steel anchor box are located by connecting, lift the 3rd sections steel anchor box then and itself and the second sections steel anchor box are located by connecting, build the Y tower concrete of the second sections steel anchor box height this moment.And then lift fourth, fifth sections steel anchor box and it is located by connecting with third and fourth sections steel anchor box respectively, build the Y tower concrete of the 4th sections steel anchor box height then, by that analogy, carry out the concreting of last sections steel anchor box height at last.
Described technical scheme remains 1 sections steel anchor box and is in the state of not building, lead, adjust and the effect that makes things convenient for high-strength bolt to be connected so that next sections steel anchor box is installed the system of starting to control, avoid the concrete of building that the accurate location and installation of sections steel anchor box is caused interference, described concrete construction has comprised the operation of concrete being carried out maintenance.
Further, in described step (3): be provided with the prestressing force level to drag-line between corresponding upper king-post strut, this feature helps to control upper king-post strut root concrete stress in the work progress, reduce the influence of horizontal component, to reduce the deflection of cantilever construction, thereby be convenient to control the upper king-post strut line style, the construction subsidiary stress is controlled in the design allowed band, guarantee structural safety.
Further: described rod member support Lift-on/Lift-off System comprises upstream rod member support and the downstream lever dolly that is located at girder upstream and downstream both sides respectively, two cage rod member supports are laterally respectively established in the upstream and downstream both sides, described upstream rod member support and downstream lever dolly all are connected with the built-in fitting established on the girder of Y shape tower upper king-post strut root, and upstream rod member support, downstream lever dolly and tower seat are in length and breadth to being equipped with the horizontal-associate beam; Upstream rod member support and downstream lever dolly are all gone up and respectively are provided with a cover mast Lift-on/Lift-off System.The four limbs lattice variable cross-section fish belly shape structure that the arm of described mast Lift-on/Lift-off System becomes for the shaped steel assembly welding, every cover mast Lift-on/Lift-off System is established a lifting hoist engine and a luffing hoist engine.The characteristics of technique scheme are: the cost that the manufacturing of rod member support Lift-on/Lift-off System is used in this programme is much lower than the large-tonnage tower crane, and do not need special material and equipment, highly versatile, use universal rod body just can assembly unit to be barricaded as, recyclable repeated use, save the cost of whole engineering, be suitable for the short leaning tower construction of steel and concrete structure.
Further: described upstream rod member support and downstream lever dolly are provided with the back cable wind rope, and described back cable wind rope has been strengthened the resistance to overturning of Lift-on/Lift-off System.
Further: described horizontal-associate beam is provided with rail flat car, is convenient to carry out on the mast Lift-on/Lift-off System transhipment of material.
Description of drawings
The present invention is further detailed explanation below in conjunction with the drawings and specific embodiments:
Fig. 1 is the normotopia schematic diagram of Y shape tower in the embodiment of the invention;
Fig. 2 is the side position schematic diagram of Y shape tower in the embodiment of the invention.
The specific embodiment
Known concrete structure and characteristic are no longer set forth at this in the following proposal, are undertaken by following step.
One, Lift-on/Lift-off System is installed and test
(1) design of rod member support Lift-on/Lift-off System and installation
Lift pylon and mast Lift-on/Lift-off System as depicted in figs. 1 and 2: rod member support Lift-on/Lift-off System is established built-in fitting on 2 No. zero piece spares of girder of Y shape tower upper king-post strut 1 root, adopt universal rod body assembly unit pylon, the upstream and downstream both sides laterally are respectively equipped with upstream rod member support 31 and downstream lever dolly 32, two cage universal rod body supports (as shown in Figure 2) are laterally respectively established in the upstream and downstream both sides, upstream and downstream both sides lifting pylon and tower seat are in length and breadth to being provided with horizontal-associate beam 33, and the horizontal-associate beam of below is provided with rail flat car 34.Pylon length overall 32m, net span are 16m; Lifting pylon height is 34m, and width is 8m.
One cover mast Lift-on/Lift-off System respectively is installed on upstream rod member support 31 and downstream lever dolly 32, is used for the lifting and the installation of steel anchor box.Arm 4 adopts four limbs lattice variable cross-section fish belly shape structure, is formed by the shaped steel assembly welding, and its length is 22.6m, and every cover mast Lift-on/Lift-off System is established a lifting hoist engine and a luffing hoist engine, back cable wind rope 35 is set to strengthen the resistance to overturning of Lift-on/Lift-off System.
The arm design bearing capacity adds 30% impact force by maximum steel anchor box weight and considers that its intensity, rigidity and Calculation on stability all satisfy the related specifications requirement.
(2) lift loading test in advance
Before first sections steel anchor box lifting, lift loading test earlier in advance, the scene utilizes reinforcing bar as trial load.Reply rod member support Lift-on/Lift-off System is checked comprehensively before the test, prepares to satisfy the 17t reinforcing bar of trial load loading environment then.Lifting test loads and is divided into three grades, is respectively 50%, 100%, 120% and carries out the classification examination and hang.
Before the lifting test, reinforcing bar is tied up in batches, checked its safety, and be transported to the Heave Here.Arm slowly falls 4~5 times repeatedly after platform 0.2m is left in the slow lifting of trial load again.Check the operability, stability, the reliability of hoist engine brake, the balance of load, the safety of suspension centre colligation of rod member support Lift-on/Lift-off System, whether the distortion situation of measuring the universal rod body pylon simultaneously is in the scope that design allows; Check whether the arm change angle adheres to specification, sensitivity, the reliability of safety guards such as the luffing indicator of arm and various lead limit switches are confirmed can formally use after errorless.
Two, steel anchor box manufacturing
(1) steel anchor box manufacturing
Steel anchor box is made to guarantee welding quality, particularly thick plates quality and outward appearance physical dimension in factory.
(2) steel anchor box is assorted in advance
The pre-assembly unit of all members of steel anchor box and steel anchor box is all carried out on through smart flat steel platform, with linear, accurate contraposition of keyhole and the total quality that guarantees steel anchor box.Divide three steps to carry out:
1. the interior anchor structure of steel anchor box body is assorted;
2. anchor structure and casing and suspension cable sleeve pipe is whole assorted;
3. steel anchor box is assorted.
(3) how much control accuracies of steel anchor box outward appearance
Make and pre-assembly unit measurement achievement according to the single-unit section, steel anchor box is made how much control accuracies of outward appearance:
The anchor point coordinate of steel anchor box (Δ x, Δ y, Δ z) maximum deviation is less than 5mm;
The pre-assembly unit axis of steel anchor box (comprising longitudinal and transverse axis) deviation is less than 10mm.
Three, steel anchor box lifting and location
(1) preparation is installed
First sections steel anchor box is arranged in the space scope of king-post main reinforcement and steel anchor box WELDING STUDS with regard to bit platform, first sections steel anchor box and concrete joint portion shaped steel platform in place is installed, and with concrete embedded firm welding of Y shape tower, measure and accurately demarcate first sections steel anchor box on-station position.Site inspection sections steel anchor box apparent size also meets design requirement and the pre-assembly unit requirement of factory.
(2) steel anchor box lifting
Steel anchor box is transported to the position, Heave Here by land transportation by the rail flat car on the horizontal-associate beam.Arm when lifting, take on king-post, to establish angle pulley, utilize the 5t hoist engine on the trestle to draw guiding, make the lifting hawser vertical after, the mast Lift-on/Lift-off System is removed the guiding pull rope with the accurate installation in position of steel anchor box.
(3) accurately location and locking of first sections steel anchor box:.
After first sections steel anchor box lifts by crane shaped steel platform calibration position installation in position, use chain block to hang to finely tune first sections steel anchor box and accurately locate with jack, measure axis, plan-position and the elevation of first sections steel anchor box, after checking that satisfied design and monitored instruction require, welding is installed immediately prevents displacement, anti-topple locking-typed steel bracket and steel anchor box bottom flap.
(4) steel anchor box is in place
1) the sections steel anchor box is in place
End face keyhole contraposition on the adjacent segment steel anchor box, accurately measure steel anchor box axis, plan-position and elevation, use mast Lift-on/Lift-off System, jack fine setting sections steel anchor box accurately to locate, its plane Deviation Control is passed through the high-strength bolt bolt up and down between the steel anchor box in 5mm.Adopt the closely connected rate between the clearance gauge check joint face, guarantee that it has 〉=50% the closely connected rate of area; Do not satisfying under the situation of 50% closely connected rate, adopting stalloy choker block space, to guarantee the closely connected rate designing requirement of area.
After steel anchor box is in place, carry out repetition measurement again one time, there are phenomenons such as skew if find steel anchor box, unclamp high-strength bolt, utilize mast Lift-on/Lift-off System, jack to finely tune, and the filling stalloy, after accurately measuring repeatedly and meeting design requirement, tighten high-strength bolt again.Measure situation according to choker block situation and working control, installing for following sections steel anchor box provides the measurement controlling parameter.
2) high-strength bolt connects
Steel anchor box is checked the high-strength bolt presentation quality when installing, can use after qualified; The high-strength bolt strictness is taken by the length of design code, and its packing ring, nut strictness are taken in accordance with regulations, and notes the positive and negative of packing ring.Only accurately on the high-strength bolt nut, apply torsion, execute to turn round and twist at the beginning of branchs and eventually stubborn two stages carry out.The high-strength bolt that uses constant torque wrench that steel anchor box is connected carries out just twisting, and its moment of torsion is about 50% of construction moment of torsion, adopts the electric twisting spanner to carry out end and twists.
3) erection sequence of steel anchor box
This worker method steel anchor box is installed and is taked and have rope district corresponding king-post section concrete timed delivery to replace to construct, when king-post has the first segment section concrete construction of rope district, after taking 3 sections steel anchor boxes of hoisting and locating, build the Y tower concrete of preceding 2 sections steel anchor box height, reserve the initial alignment platform of 1 sections steel anchor box as next cycle installation steel anchor box; Each sections concrete construction of king-post later on after taking to lift 2 sections steel anchor boxes earlier, is built 2 sections steel anchor box height Y tower concrete again.Remain 1 sections steel anchor box and be in the state of not building, lead, adjust and the effect that makes things convenient for high-strength bolt to be connected so that next sections steel anchor box is installed the system of starting to control.
Four, Y tower construction monitoring
(1) for realizing the accurate location and the linear control of Y shape Tata post concrete construction of steel anchor box, the deflection of control king-post cantilever construction, prevent that the inboard concrete of king-post root from bigger tensile stress occurring and causing possible cracking, guarantee steel and concrete structure construction quality and safety, must monitor steel anchor box installation and the concrete construction of Y shape tower between implementation period.
(2) cause the elastic deformation of the Y shape tower cantilever construction of having built according to steel anchor box location and king-post concrete construction, template deformation, influences such as shrinkage and creep, and sunshine, controlling parameter such as the temperature difference and working load, and the bridge primary structure state that provides in conjunction with design document and relevant constructure scheme, the construction operating mode, data such as working load are carried out control analysis, steel anchor box is installed and the controlling parameter and the monitored results of king-post concrete construction in conjunction with measuring, to installation of sections steel anchor box and king-post concrete construction control propose necessary adjustment to satisfy the expection after constructing down.
Five, king-post template and concreting
(1) king-post template
Y shape king-post upstream and downstream symmetry is carried out, and adopts the no support of bulk typing to turn over mould (punching block) construction technology, and every layer of template worn operating platform.It is all multifactor influences such as cantilever construction and working load that the design of template need be taken all factors into consideration Y shape king-post, and its intensity, rigidity and stability should satisfy code requirement.Taked the long limit of template button minor face for " Y " shape tower template, fixed to pull bar is set in length and breadth, the four sides template is coupled to integral body.
For preventing the template flare, taked with die drawing bar inside and outside the king-post connect, upstream and downstream king-post template is to measure such as drawing, and guaranteed safe, the linear and quality of " Y " tower construction.
(2) king-post concrete
1) concrete mix: concrete has performances such as workability, pumpability and slow setting are early strong, mixes Admixture and reduces the unit cement consumption reduction heat of hydration.
2) concrete casting building technology: during the king-post concrete construction, put in storage by the concrete pump pumping of concrete, layer-by-layer distribution, placement layer by layer, lift height are 40cm, plug-in type and attached vibrator vibration compacting.
3) king-post concrete curing and treatment of construction joints: adopt corresponding moisture-heat preservation maintenance according to weather.Constuction joint adopts manual method cutter hair, uses high pressure water washing.
Six, Y shape tower construction level is to drawing measure
(1) for upper king-post strut 1 root concrete stress in the control work progress, king-post is linear and Stability Analysis of Structures, safety, prestressing force must be set to drawing measure when Y shape tower is constructed.To drawing being provided with of prestressed cable to need to calculate definite according to factor analyses such as the deadweight of Y shape tower cantilever construction, working load, designing requirement, construction technology, temperature.
(2) this worker method is provided with twice prestressing force level to drag-line when " Y " shape tower column structure is constructed.First road is below upper king-post strut 1 steel and concrete binding site, and second road is arranged on steel and concrete combined segment middle part, and drag-line is adopted prestress wire.In upper king-post strut 1 per pass prestressing force level drag-line is provided with four to drag-line, first road is 12.5t to every rope pretension of drag-line, amounts to 50t; The second road level is 27.5t to every pretension of drag-line, amounts to 110t.Level is not less than 3.5 to the safety coefficient K of drag-line.After construction finishes, carry out the dismounting of hanging device.
Above-described only is preferred implementation of the present invention; should be understood that; for a person skilled in the art; under the prerequisite that does not break away from structure of the present invention; can also make some distortion and improvement; these also should be considered as protection scope of the present invention, and these can not influence effect of the invention process and practical applicability.

Claims (8)

1. low-pylon cable-stayed bridge steel reinforced concrete mixing Y shape tower construction is characterized in that may further comprise the steps:
(1) makes the sections steel anchor box, on the girder of Y shape tower upper king-post strut root, establish rod member support Lift-on/Lift-off System simultaneously;
(2) lifting of using described rod member support Lift-on/Lift-off System to carry out the sections steel anchor box is fixed, and carries out concrete construction to lifting the sections steel anchor box of fixedly finishing;
(3) dismounting of rod member support Lift-on/Lift-off System.
2. low-pylon cable-stayed bridge steel reinforced concrete mixing Y shape tower construction according to claim 1, it is characterized in that in described step (1): being manufactured on the steel platform of the member of sections steel anchor box carried out, and the manufacturing of the member of described sections steel anchor box may further comprise the steps: anchor structure is assorted in the sections steel anchor box body; Described anchor structure and sections steel anchor box body and suspension cable sleeve pipe whole assorted, it is assorted in advance to carry out the sections steel anchor box then on the steel platform.
3. low-pylon cable-stayed bridge steel reinforced concrete mixing Y shape tower construction according to claim 2 is characterized in that in described step (2): before the lifting of sections steel anchor box, earlier the mast Lift-on/Lift-off System is lifted loading test in advance.
4. low-pylon cable-stayed bridge steel reinforced concrete mixing Y shape tower construction according to claim 3, it is characterized in that in described step (2): in hoisting process first, after first sections steel anchor box rises and winches to shaped steel platform calibration position installation in position, use chain block to hang or jack is finely tuned first sections steel anchor box and accurately located, measure axis, plan-position and the elevation of first sections steel anchor box then, after design and monitored instruction requirement are satisfied in described measurement, locking-typed steel bracket and sections steel anchor box bottom flap are installed;
In the hoisting process of the sections steel anchor box after described lifting first, when lifting N sections steel anchor box, carry out being located by connecting between N sections steel anchor box and the N-1 sections steel anchor box simultaneously, when N is odd number, promptly carry out the upper king-post strut concrete construction of N-1 sections steel anchor box height, after the lifting of minor details section steel anchor box is fixing, promptly carry out the upper king-post strut concrete construction of minor details section steel anchor box height.
5. according to arbitrary described low-pylon cable-stayed bridge steel reinforced concrete mixing Y shape tower construction among the claim 1-4, it is characterized in that in described step (2): be provided with the prestressing force level to drag-line between corresponding upper king-post strut.
6. low-pylon cable-stayed bridge steel reinforced concrete mixing Y shape tower construction according to claim 5, it is characterized in that: described rod member support Lift-on/Lift-off System comprises upstream rod member support and the downstream lever dolly that is located at girder upstream and downstream both sides respectively, two cage rod member supports are laterally respectively established in the upstream and downstream both sides, described upstream rod member support and downstream lever dolly all are connected with the built-in fitting established on the girder of Y shape tower upper king-post strut root, and upstream rod member support, downstream lever dolly and tower seat are in length and breadth to being equipped with the horizontal-associate beam; Upstream rod member support and downstream lever dolly are all gone up and respectively are provided with a cover mast Lift-on/Lift-off System, the four limbs lattice variable cross-section fish belly shape structure that the arm of described mast Lift-on/Lift-off System becomes for the shaped steel assembly welding, every cover mast Lift-on/Lift-off System is established a lifting hoist engine and a luffing hoist engine.
7. low-pylon cable-stayed bridge steel reinforced concrete mixing Y shape tower construction according to claim 6 is characterized in that: described upstream rod member support and downstream lever dolly are provided with the back cable wind rope.
8. low-pylon cable-stayed bridge steel reinforced concrete mixing Y shape tower construction according to claim 7, it is characterized in that: described horizontal-associate beam is provided with rail flat car.
CN 201110065318 2011-03-18 2011-03-18 Construction method of steel-concrete mixed Y-shaped tower of low-pylon cable-stayed bridge CN102168405B (en)

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CN104032678A (en) * 2014-05-06 2014-09-10 中铁港航局集团有限公司 H-shaped tower column inner force adjustable temporary cross supporting structure and construction method thereof
CN104343086A (en) * 2014-10-27 2015-02-11 中铁港航局集团有限公司 Small-spatial construction method for steel anchor beam anchoring zone of cable-stayed bridge upper pylon
CN104562932A (en) * 2015-01-06 2015-04-29 大连理工大学 Embedded type steel anchor box
CN104746435A (en) * 2015-04-03 2015-07-01 中国建筑第六工程局有限公司 Wide-angle Y-shaped pier column construction method
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CN102926329B (en) * 2012-11-23 2015-01-21 江苏省交通工程集团有限公司 Device dedicated for lifting steel box beam of small and medium-sized long-span suspension bridge and lifting method
CN104032678A (en) * 2014-05-06 2014-09-10 中铁港航局集团有限公司 H-shaped tower column inner force adjustable temporary cross supporting structure and construction method thereof
CN104032678B (en) * 2014-05-06 2016-08-24 中铁港航局集团有限公司 H type king-post internal force adjustable false stull structure and construction method thereof
CN104343086A (en) * 2014-10-27 2015-02-11 中铁港航局集团有限公司 Small-spatial construction method for steel anchor beam anchoring zone of cable-stayed bridge upper pylon
CN104562932A (en) * 2015-01-06 2015-04-29 大连理工大学 Embedded type steel anchor box
CN104562932B (en) * 2015-01-06 2016-04-13 大连理工大学 A kind of flush type steel anchor box
CN104746435A (en) * 2015-04-03 2015-07-01 中国建筑第六工程局有限公司 Wide-angle Y-shaped pier column construction method
CN105220613A (en) * 2015-10-19 2016-01-06 中铁第四勘察设计院集团有限公司 A kind of suspension cable anchor structure eliminating concrete girder cable stayed bridge span centre pulling force
CN110387832A (en) * 2019-08-19 2019-10-29 中冶建工集团有限公司 A kind of lifting device of bridge steel anchor box segment

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