CN107100076A - A kind of Cast-in-place Bent Cap construction method - Google Patents

A kind of Cast-in-place Bent Cap construction method Download PDF

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Publication number
CN107100076A
CN107100076A CN201710108954.8A CN201710108954A CN107100076A CN 107100076 A CN107100076 A CN 107100076A CN 201710108954 A CN201710108954 A CN 201710108954A CN 107100076 A CN107100076 A CN 107100076A
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CN
China
Prior art keywords
pier
truss
construction
frame
bent cap
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Pending
Application number
CN201710108954.8A
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Chinese (zh)
Inventor
寇海军
尚尔海
邹振中
杨永明
李金永
毛佳兴
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CHINA RAILWAY 19TH BUREAU GROUP Co Ltd
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CHINA RAILWAY 19TH BUREAU GROUP 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.)
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Application filed by CHINA RAILWAY 19TH BUREAU GROUP Co Ltd filed Critical CHINA RAILWAY 19TH BUREAU GROUP Co Ltd
Priority to CN201710108954.8A priority Critical patent/CN107100076A/en
Publication of CN107100076A publication Critical patent/CN107100076A/en
Pending legal-status Critical Current

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    • EFIXED CONSTRUCTIONS
    • E01CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01DCONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
    • E01D19/00Structural or constructional details of bridges
    • E01D19/02Piers; Abutments ; Protecting same against drifting ice
    • 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
    • EFIXED CONSTRUCTIONS
    • E01CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01DCONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
    • E01D2101/00Material constitution of bridges
    • E01D2101/20Concrete, stone or stone-like material
    • E01D2101/24Concrete
    • E01D2101/26Concrete reinforced
    • E01D2101/28Concrete reinforced prestressed

Abstract

The present invention relates to bridge construction technical field, more particularly to a kind of Cast-in-place Bent Cap construction method, its operating procedure is including pier-side bracket system structure design, Bridge Pier Construction and installation of embedded parts, installation pier-side bracket system, Prestressed Slab Beams construction and removes pier septate mode plate and A-frame.The present invention can solve the problem that the problem of existing construction method is not suitable for profundal zone operation at sea, its pier-side bracket system used it is simple in construction, it is easy to operate, and repeatable utilization, energy-conserving and environment-protective, pass through the construction method of bent cap that the pier-side bracket system is carried out, efficiency of construction is high, and construction cost is low.

Description

A kind of Cast-in-place Bent Cap construction method
Technical field
The present invention relates to bridge construction technical field, more particularly to a kind of Cast-in-place Bent Cap construction method.
Background technology
Coping Construction is the emphasis of bridge construction in bridge, and the main construction method of current bent cap is to set up full framing Method, but be mostly marine profundal zone operation during sea-spanning bridge con struction, construction pier stud bent cap is not suitable for setting up full hall load-bearing Support, and Cast-in-place Bent Cap construction can not be carried out using conventional floor stand method;Specific to Daliang City, during municipal government is in order to alleviate The traffic pressure on Shanxi road, an East and West direction trunk parallel to Zhongshan Road and Huangpu road is built in Daliang City black stone reef gulf Road --- southern Binhai Road star bay bridge spanning the sea.Main line is individual layer two-wire bridge in starting point, and line spacing is 55m.Main line At sea gradually transition is dual deck bridge, and when by Xinghai Square, circuit is perpendicular to square axis, main bridge main span centre bit In on the axis of square, circuit is 1000m apart from the distance of the century-old sculptures or statues displayed in urban public areas in Xinghai Square, and main line is westwards after double layered transition is individual layer In High-tech Park, reclaimation area is logged in.Bridge total length about 6km.Star bay bridge spanning the sea eastern section engineering by eastern connecting line, eastern access bridge and The part of east side Long span concrete access bridge three is constituted, its Middle East access bridge S1-S23, X1-X8 pier, eastern connecting line ring road A1-A7, B1-B10 piers are designed as high-rise pile cap, only post hollow pier, and pier height is more than 20m, and pier top is bent cap, and pier stud direction across bridge is wide 4.5m, the long 14.9m of bent cap direction across bridge, high 2.0m, along bridge to wide 3.4m, both sides are encorbelmented 5.2m length, and all marine profundal zones are made Industry.
Therefore, in view of the active demand that bridge spanning the sea is built at present, it is necessary to provide a kind of new Cast-in-place Bent Cap construction Method, to overcome the problem of existing construction method is not suitable for marine profundal zone operation.
The content of the invention
(1) technical problem to be solved
The present invention provides a kind of Cast-in-place Bent Cap construction method, and profundal zone at sea is not suitable for for solving existing construction method The problem of operation, the efficiency of construction of the construction method is high, and construction cost is low.
(2) technical scheme
In order to solve the above-mentioned technical problem, the present invention provides a kind of Cast-in-place Bent Cap construction method, and it includes following operation:
(1) pier-side bracket system structure design
Prevent it to drawing with to pull system between 1 A-frame of each installation in bridge pier both sides below bent cap, A-frame Sidesway, the A-frame includes horizontal bearing frame, perpendicular support and diagonal brace, and the horizontal bearing frame, diagonal brace and perpendicular support are sequentially connected with Form A-frame structure, the upper and lower ends of the perpendicular support are respectively equipped with top truss and lower truss, the top truss and Be equipped with hooping structure on the lower truss, for the outer wall for bridge pier pier shaft of fitting, between two top truss and Tensioning fixation is carried out to pull system using described between two lower truss;
(2) Bridge Pier Construction and installation of embedded parts
When Bridge Pier Construction is to away from bent cap bottom setpoint distance, the pre-embedded bolt system in bridge pier pier shaft;
(3) pier-side bracket system is installed
A. bridge pier form removal and concrete strength reach starts to install pier-side bracket system after design strength,
B. the A-frame is lifted, the bottom of the unilateral A-frame of bridge pier is seated in the institute of bridge pier correspondence position State in bolt system, the hooping structure is fitted the outer wall of bridge pier pier shaft, the top of the A-frame is by jack in bridge pier Stress in cage bar,
C. b step is repeated, the installation of the A-frame of bridge pier opposite side is completed,
D. install described to pull system on two top truss, and carry out tensioning, realize two top purlins Tensioning fixation between frame, installs described to pull system on two lower truss, and carries out tensioning, realizes described in two Tensioning fixation between lower truss, so that the A-frame of bridge pier both sides is locked with described to pull system,
E. check and fasten pier-side bracket system;
(4) Prestressed Slab Beams are constructed
A. lay bed die after the A-frame installation on the girder of horizontal bearing frame, install, assembling reinforcement, in advance Prestress pipe is filled, and side form is installed;
B. bent cap concrete is poured;
C. when bent cap concrete strength reaches requirement, stretch-draw prestressing force steel beam,
D. hole path pressure grouting and sealing off and covering anchorage work are carried out after prestressed stretch-draw in time, Prestressed Slab Beams construction is completed
(5) pier septate mode plate and A-frame are removed
Dismounting bent cap side form, bed die, unclamp the described to pull system of A-frame described in tensioning, dismantle pier-side bracket successively System.
Wherein, it is described that fining twisted steel is included to pull system, between two top truss, two lower truss Between using the fining twisted steel carry out tensioning fixation.
Wherein, the fining twisted steel is multiple.
Wherein, tensioning fixation is carried out using 6 fining twisted steels between two top truss.
Wherein, tensioning fixation is carried out using 2 fining twisted steels between two top truss.
Wherein, the hooping structure is circular arc steel plate anchor ear.
Wherein, the horizontal bearing frame includes two girders be arrangeding in parallel, and the outer end of two girders passes through longeron Connection, the inner of two girders is connected with the top truss.
Wherein, between the horizontal bearing frame and the diagonal brace, it is hinged between the diagonal brace and the perpendicular support with steel.
(3) beneficial effect
The Cast-in-place Bent Cap construction method that the present invention is provided, has the characteristics that compared to prior art:
1st, Cast-in-place Bent Cap construction method of the invention, using pier-side bracket system, it can be not suitable for setting up full hall branch Cast-in-place Bent Cap construction is completed during frame, is suitable for marine profundal zone operation, ensure that the precision of Coping Construction, intensity requirement and Safety requirements;
2nd, Cast-in-place Bent Cap construction method of the invention, the pier-side bracket system configurations that it is used are simple, it is easy to process Make and install, simple installation is quick, efficiency of construction is high, and construction cost is low;
3rd, under Cast-in-place Bent Cap construction method of the invention, its pier-side bracket system used, the support using oblique triangle Limb point is stress point, passes through the frictional force between upper and lower two groups of hooping structures and pier shaft outer wall and the stretching force to pull system The A-frame of bridge pier both sides is constituted into an entirety by pier-side bracket system, and is stabilized on solid concrete bridge pier pier shaft, This kind of form can reduce the maximum defluxion of the bending stress that whole bracket born in bent cap cantilever segment and cantilever segment end, make Obtain pier-side bracket and meet required strength and stiffness during Coping Construction.
Brief description of the drawings
Fig. 1 is arranged on the front view on bridge pier for the pier-side bracket system that the present invention is provided;
Fig. 2 is arranged on the top view on bridge pier for the pier-side bracket system that the present invention is provided;
Fig. 3 is arranged on the overall structure figure on bridge pier for the pier-side bracket system that the present invention is provided;
In figure, 1:Horizontal bearing frame;101:Girder;102:Longeron;2:Perpendicular support;3:Diagonal brace;4:Top truss;5:Bottom purlin Frame;6:Hooping structure;7:To pull system;8:Bridge pier.
Embodiment
For the ease of understanding the present invention, the present invention is described more fully below with reference to relevant drawings.In accompanying drawing Give the better embodiment of the present invention.The preferred embodiments of the present invention are these are only, the special of the present invention is not thereby limited Sharp scope, equivalent structure or equivalent flow conversion that every utilization description of the invention and accompanying drawing content are made, directly or Connect and be used in other related technical fields, be included within the scope of the present invention.
Unless otherwise defined, all of technologies and scientific terms used here by the article is with belonging to technical field of the invention The implication that technical staff is generally understood that is identical.Term used in the description of the invention herein is intended merely to description tool The purpose of the embodiment of body, it is not intended that in the limitation present invention.Term as used herein " and/or " including one or more The arbitrary and all combination of related Listed Items.
The present invention provides a kind of pier-side bracket system and Cast-in-place Bent Cap construction method, for solving existing construction method not The problem of suitable profundal zone operation at sea, the efficiency of construction of the construction method is high, and construction cost is low.
As Figure 1-3, a kind of Cast-in-place Bent Cap construction method, including following operation are provided in the embodiment of the present invention:
(1) pier-side bracket system structure design
Zip is determined with to pull system between 1 A-frame of each installation in bridge pier both sides below bent cap, A-frame, Prevent its sidesway;A-frame includes horizontal bearing frame 1, perpendicular support 2 and diagonal brace 3, and horizontal bearing frame 1, diagonal brace 3 and perpendicular support 2 are sequentially Connection forms A-frame structure;Anchor ear system includes top truss 4, lower truss 5 and hooping structure 6, and top truss 4 is with Portion's truss 5 is respectively arranged on the upper and lower ends of perpendicular support 2, top truss 4 and lower truss 5 and is equipped with hooping structure 6, is installing three Outer wall of the hooping structure 6 for bridge pier 8 of fitting during angle support;Adopted between two top truss 4, between two lower truss 5 Tensioning fixation is carried out with to pull system 7 so that the A-frame of the both sides of bridge pier 8 passes through whole into one to tensing solid to pull system Body support system, to improve the resistance to overturning of pier-side bracket;
Specifically, including to pull system 7 between fining twisted steel, two top truss 4, being adopted between two lower truss 5 Tensioning fixation is carried out with fining twisted steel;
In order to ensure two A-frames to the tight intensity of zip, fining twisted steel sets multiple, i.e., in two top purlin Set between frame 4 and multiple fining twisted steels are set between multiple fining twisted steels, two lower truss 5.Specifically, two tops Carried out between truss 4 using 6 fining twisted steels between tensioning fixation, two lower truss 5 using 2 fining twisted steels progress Tensioning fixation;
It is set in order that obtaining A-frame on the outside of bridge pier, the hooping structure 6 of the laminating pier shaft outer wall of bridge pier 8 is circular arc steel plate Anchor ear;
It will be capable of the load of uniform bent cap to horizontal bearing frame 1, therefore the strength and stiffness of horizontal bearing frame 1 need one Horizontal bearing frame 1 in fixed requirement, the pier-side bracket system includes two girders 101 be arrangeding in parallel, two parallel masters Connected between the outer end of beam 101 by longeron 102, the inner of two girders 101 is all connected with top truss 4;
In order to ensure the structural stability and robustness of A-frame structure, between horizontal bearing frame 1 and diagonal brace 3, tiltedly It is hinged between support 3 and perpendicular support 2 with steel;
(2) Bridge Pier Construction and installation of embedded parts
Bridge Pier Construction to away from bent cap bottom setpoint distance when in bridge pier pier shaft pre-embedded bolt system;The bolt system be for When pier-side bracket system being installed in bridge pier 8 both sides, play a part of the firm pier-side bracket system of support, improve pier-side bracket system The resistance to capsizing united during Coping Construction.It is understood that the steadiness in order to improve support pier-side bracket system, Pre-buried multiple bolt systems on bridge pier pier shaft;
(3) pier-side bracket system is installed
A. bridge pier form removal and concrete strength reach starts to install pier-side bracket system after design strength,
B. A-frame is lifted, the bottom of the A-frame of bridge pier side is that lower truss 5 is seated in bridge pier correspondence position Bolt system on, on the outside of the laminating bridge pier of hooping structure 6, the top of A-frame be horizontal bearing frame 1 by jack in bridge pier 8 Cage bar on stress,
C. above-mentioned b step is repeated, the installation of the A-frame of bridge pier opposite side is completed,
D. installed on two top truss 4 to pull system 7, and carry out tensioning, realize between two top truss 4 Zip is determined, and is installed on two lower truss 5 to pull system 7, and carries out tensioning, realizes the tensioning between two lower truss 5 Locking, so that the A-frame of bridge pier both sides is locked with to pull system 7,
Specifically, wearing fining twisted steel between two top truss 4, and used in the outside of two top truss 4 Locking device is locked to it;Wear fining twisted steel between two lower truss 5, and in the outer of two lower truss 5 It is locked using locking device side;Pass through between fining twisted steel difference again two top truss 4 and two bottoms purlin Tensioning is locked between frame 5, so as to realize that installation of symmetrically arranged two A-frames on the pier shaft of bridge pier 8 is consolidated.It can manage Solution, in order to ensure two A-frames to the tight intensity of zip, multiple finish rolling screw threads are set between two top truss 4 Multiple fining twisted steels are set between steel, two lower truss 5;
E. check and fasten pier-side bracket system;
Specifically, fining twisted steel tensioning to design stress tonnage to fasten pier-side bracket system, with convenient follow-up Coping Construction;
(4) Prestressed Slab Beams are constructed
A. bed die is laid after A-frame installation on the girder of horizontal bearing frame, installation, assembling reinforcement, prepackage are pre- Stress pipeline, and side form is installed;
B. bent cap concrete is poured;
C. when bent cap concrete strength reaches requirement, stretch-draw prestressing force steel beam,
D. hole path pressure grouting and sealing off and covering anchorage work are carried out after prestressed stretch-draw in time, Prestressed Slab Beams construction is completed
(5) pier septate mode plate and A-frame are removed
Dismounting bent cap side form, bed die successively, unclamp tensioning A-frame to pull system 7, dismantle A-frame.
The Cast-in-place Bent Cap construction method of the present invention, its pier-side bracket system utilized passes through the spiral shell that is embedded in bridge pier pier shaft Tie system stabilization to be supported and fixed on bridge pier, improve resistance to capsizing of the pier-side bracket system during Coping Construction.Can be with Understand, multiple bolt systems are set on bridge pier pier shaft, to improve the steadiness of support pier-side bracket system.
Because the cantilever segment of bent cap is general longer, if relying solely on during horizontal bearing frame can not undertake Coping Construction The load transmitted, the outer end of horizontal bearing frame is supported using diagonal brace, branch stands on the perpendicular lower end supportted to diagonal brace downwards, by flat upwards The support for the oblique triangle that bearing frame, diagonal brace and perpendicular support connection are formed is put, its lower limb point is stress point, passes through upper and lower two groups of anchor ears Frictional force between structure and pier shaft outer wall and to the stretching force of pull system by pier-side bracket system by the triangle of bridge pier both sides Support constitutes an entirety, and is stabilized on solid concrete bridge pier pier shaft, and this kind of form can reduce whole bracket in bent cap Bending stress and the maximum defluxion of cantilever segment end that cantilever segment is born so that pier-side bracket is met during Coping Construction Required strength and stiffness;The cantilever horizontal bearing frame for stretching out pier shaft both sides is capable of in the load of uniform bent cap, work progress, The size of its cantilever is customized and is processed inside according to different bent cap sizes.
The pier-side bracket system being related in the Cast-in-place Bent Cap construction method of the present invention, structure type is simple, it is easy to processing system Make and install, simple installation is quick, and efficiency of construction is high, and construction cost is low, the machinery needed for during Coping Construction is all It is the most frequently used equipment in bridge construction, the special or complex device special without adding, technical process is brief, it is easy to operate, Be particularly suitable for use on lake, on river, the water middle ring such as sea construct within the border pier cap beam, can complete to hang without setting up full framing The construction of arm bent cap, the pier-side bracket can be reused, energy-conserving and environment-protective.
The Cast-in-place Bent Cap construction method of the present invention, its pier-side bracket used uses shaped steel triangle angle-table bracket, by work Word steel does the composition that main bearing beam, channel-section steel box make perpendicular support and diagonal brace, and the common two panels triangular supports in pier stud one side pass through two up and down Rectangle steel box-girder is top and the bottom truss lateral connection, and steel box-girder is welded by the thick steel plates of 25mm are elongated, welded on bottom steel case Two brackets are connect, spacing 1.5m sets circular anchor ear between steel box-girder and pier shaft side;Diameter 32mm is worn at steel box-girder two ends up and down Fining twisted steel carries out tensioning and holds pier stud tightly.The construction method can thoroughly, effectively solve Single column pier bent cap cantilever end overlength Technical barrier, filled up blank of the domestic bridge construction in correlative technology field.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all essences in the present invention God is with principle, and any modification, equivalent substitution and improvements made etc. should be included in the scope of the protection.

Claims (8)

1. a kind of Cast-in-place Bent Cap construction method, it is characterised in that including following operation:
(1) pier-side bracket system structure design
Prevent its sidesway to drawing with to pull system between 1 A-frame of each installation in bridge pier both sides below bent cap, A-frame, The A-frame includes horizontal bearing frame, perpendicular support and diagonal brace, and the horizontal bearing frame, diagonal brace and perpendicular support are sequentially connected with to form three Angle support structure, the upper and lower ends of the perpendicular support are respectively equipped with top truss and lower truss, the top truss and it is described under Hooping structure is equipped with portion's truss, for the outer wall for bridge pier pier shaft of fitting, between two top truss and two institutes State between lower truss and tensioning fixation to be carried out to pull system using described;
(2) Bridge Pier Construction and installation of embedded parts
When Bridge Pier Construction is to away from bent cap bottom setpoint distance, the pre-embedded bolt system in bridge pier pier shaft;
(3) pier-side bracket system is installed
A. bridge pier form removal and concrete strength reach starts to install pier-side bracket system after design strength,
B. the A-frame is lifted, the bottom of the unilateral A-frame of bridge pier is seated in the spiral shell of bridge pier correspondence position Tie on system, the outer wall of the hooping structure laminating bridge pier pier shaft, the top of the A-frame hangs over bridge pier master by jack Interim stress on muscle,
C. b step is repeated, the installation of the A-frame of bridge pier opposite side is completed,
D. install described to pull system on two top truss, and carry out tensioning, realize two top truss it Between tensioning fixation, install described to pull system on two lower truss, and carry out tensioning, realize two bottoms Tensioning fixation between truss, so that the A-frame of bridge pier both sides is locked with described to pull system,
E. check and fasten pier-side bracket system;
(4) Prestressed Slab Beams are constructed
A. bed die is laid after the A-frame installation on the girder of horizontal bearing frame, installation, assembling reinforcement, prepackage are pre- Stress pipeline, and side form is installed;
B. bent cap concrete is poured;
C. when bent cap concrete strength reaches requirement, stretch-draw prestressing force steel beam,
D. hole path pressure grouting and sealing off and covering anchorage work are carried out after prestressed stretch-draw in time, Prestressed Slab Beams construction is completed
(5) pier septate mode plate and A-frame are removed
Dismounting bent cap side form, bed die, unclamp the described to pull system, dismounting pier-side bracket system of A-frame described in tensioning successively System.
2. Cast-in-place Bent Cap construction method according to claim 1, it is characterised in that described that finish rolling screw thread is included to pull system Tensioning fixation is carried out using the fining twisted steel between steel, two top truss, between two lower truss.
3. Cast-in-place Bent Cap construction method according to claim 2, it is characterised in that the fining twisted steel is multiple.
4. Cast-in-place Bent Cap construction method according to claim 3, it is characterised in that used between two top truss 6 fining twisted steels carry out tensioning fixation.
5. Cast-in-place Bent Cap construction method according to claim 3, it is characterised in that used between two top truss 2 fining twisted steels carry out tensioning fixation.
6. the Cast-in-place Bent Cap construction method according to any one of claim 1-5, it is characterised in that the hooping structure is Circular arc steel plate anchor ear.
7. the Cast-in-place Bent Cap construction method according to any one of claim 1-5, it is characterised in that the horizontal bearing frame Including two girders be arrangeding in parallel, the outer end of two girders is connected by longeron, two girders it is inner with The top truss connection.
8. the Cast-in-place Bent Cap construction method according to any one of claim 1-5, it is characterised in that the horizontal bearing frame It is hinged between the diagonal brace, between the diagonal brace and the perpendicular support with steel.
CN201710108954.8A 2017-02-27 2017-02-27 A kind of Cast-in-place Bent Cap construction method Pending CN107100076A (en)

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Application Number Priority Date Filing Date Title
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CN108978479A (en) * 2018-08-16 2018-12-11 中南大学 A kind of self-balancing rack system and its construction method
CN109468953A (en) * 2018-10-22 2019-03-15 广西路桥工程集团有限公司 A kind of T-type construction method of bent cap
CN110593114A (en) * 2019-09-27 2019-12-20 杭州悦为科技有限公司 Box girder construction method based on large-span box girder multi-hoop truss support bailey bracket
CN110644371A (en) * 2019-09-30 2020-01-03 中铁大桥局集团第五工程有限公司 Prefabricated capping beam installation method and system
CN111088760A (en) * 2019-12-26 2020-05-01 中交武汉港湾工程设计研究院有限公司 Large-height large-cantilever concrete structure prefabricated construction support and installation method thereof

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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108978479A (en) * 2018-08-16 2018-12-11 中南大学 A kind of self-balancing rack system and its construction method
CN109468953A (en) * 2018-10-22 2019-03-15 广西路桥工程集团有限公司 A kind of T-type construction method of bent cap
CN110593114A (en) * 2019-09-27 2019-12-20 杭州悦为科技有限公司 Box girder construction method based on large-span box girder multi-hoop truss support bailey bracket
CN110644371A (en) * 2019-09-30 2020-01-03 中铁大桥局集团第五工程有限公司 Prefabricated capping beam installation method and system
CN111088760A (en) * 2019-12-26 2020-05-01 中交武汉港湾工程设计研究院有限公司 Large-height large-cantilever concrete structure prefabricated construction support and installation method thereof

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