CN107268455B - Concrete girder gooseneck composite structure beam cradle construction method - Google Patents

Concrete girder gooseneck composite structure beam cradle construction method Download PDF

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Publication number
CN107268455B
CN107268455B CN201710514245.XA CN201710514245A CN107268455B CN 107268455 B CN107268455 B CN 107268455B CN 201710514245 A CN201710514245 A CN 201710514245A CN 107268455 B CN107268455 B CN 107268455B
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hanging basket
gooseneck
concrete
composite
platform
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CN107268455A (en
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孙宁宁
姜涛
郭梁
单立国
贾方旭
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Fourth Engineering Co Ltd of China Railway 17th Bureau Group Co Ltd
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Fourth Engineering Co Ltd of China Railway 17th Bureau Group Co Ltd
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    • 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
    • E01D21/10Cantilevered erection
    • E01D21/105Balanced cantilevered erection

Abstract

The invention discloses a kind of concrete girder gooseneck composite structure beam cradle construction methods, comprising the following steps: S1. assembled platform hanging basket in the venue, and Hanging Basket is promoted to beam bottom and is anchored at and has poured beam section;S2. the Hanging Basket moves forward to next segment S3. to be poured by anchor system and the platform hanging basket is promoted to beam bottom, and carries out elevation adjustment;S4. the thrust block of the platform hanging basket and the soldered counter-force seat hold out against closely connected to bear the horizontal thrust of Hanging Basket backward jointly;S5. assembled cantilever segment bed die and side form, gooseneck is lifted in place, suspension cable is hung and carries out first time cable tension;S6. second of tensioning is carried out to the suspension cable in this section section concrete casting process;After the completion of this section section concrete pours, tensioning beam body prestressing force and mud jacking, S7. it lifts bridge floor prefabricated board and completes the third time tensioning of the suspension cable, and by hanging basket advancing to next construction segment, this method can be constructed using front fulcrum dragging suspension basket concrete girder bilateral to wide width wing edge+gooseneck composite structure beam.

Description

Concrete girder gooseneck composite structure beam cradle construction method
Technical field
The present invention relates to a kind of applied to the bilateral concrete girder of wide width wing edge+gooseneck composite structure beam Hanging Basket construction party Method.
Background technique
The form that cable-stayed bridge main-beam uses the bilateral concrete girder of wide width wing edge and gooseneck to combine, the prefabricated bridge floor in upper berth Plate efficiently reduces the self weight of bridge, so that more convenient, the bridge structure novel and unique of prestressed arrangement, this girder Pattern is to use for the first time at home, and kingpost cantalever pours section cradle construction and uses front fulcrum dragging suspension basket, is total under double-cantilever state Two groups of Hanging Baskets are needed, single group Hanging Basket is divided into two independent Hanging Baskets.
Front fulcrum dragging suspension basket is by platform hanging basket, pull cord system, running gear, anchor system, template system, thrust machine The composition such as structure, tensioning platform.
Compared to traditional upstriker dragging suspension basket, walking system is arranged on beam face, convenient for solving the problems, such as suspended basket; It is limited by the influence of the big 4.5m of girder outer side wing edge board width, structure is weaker, can not pour girder using C-shaped hook hanging Top surface traveling.It to solve this problem, therefore is downstriker guy rope by traditional upstriker dragging suspension basket innovative design by dragging suspension basket Hanging Basket can be preferably applied for the bilateral concrete girder of wide width wing edge+gooseneck group by the design of this kind of downstriker dragging suspension basket Close the girder cantilever section construction of structural beams and wide width wing listrium.
Front fulcrum dragging suspension basket concrete girder+gooseneck composite structure bilateral to wide width wing edge is utilized therefore, it is necessary to a kind of The method that beam is constructed.
Summary of the invention
In view of this, the purpose of the present invention is be intended to provide to be used for a kind of bilateral concrete girder+steel of cable-stayed bridge wide width wing edge Cross-beam unitized construction beam Hanging Basket cantilever and its construction method.
It is horizontal that downstriker dragging suspension basket used by method of the invention can effectively solve the bilateral concrete girder of wide width wing edge+steel The cantilever casting construction of beam combination structure beam, this method use two groups of totally 4 independent Hanging Baskets, are connected by lateral connection truss whole Body, specifically includes the following steps:
S1. assembled platform hanging basket will be hung using lifting jack vertical-lift Hanging Basket to beam bottom using sunpender in the venue Basket, which is anchored at, has poured beam section, while with lateral connection frame body that two Hanging Basket connections of left and right sides are integral;Hanging Basket is put down by Hanging Basket Platform, pull cord system, running gear, anchor system, template system, thrust mechanism, tensioning platform composition;
S2. Hanging Basket is converted into walking system by anchor system, by hanging basket advancing to next segment to be poured, and by traveling System is converted into anchor system;
S3. platform hanging basket is promoted to beam bottom, carries out elevation adjustment to platform hanging basket according to monitoring formwork erection instruction;
S4. thrust mechanism is made of built-in fitting, counter-force seat and thrust block;To the pre-buried built-in fitting of beam bottom and counter-force seat Welded, by platform hanging basket thrust block and soldered counter-force seat hold out against it is closely connected with reach it is common bear Hanging Basket to Horizontal thrust afterwards;
S5. assembled cantilever segment bed die and side form, measurement and positioning cable guide pipe place gooseneck positioning on the inside of platform hanging basket Bearing beam is supported, gooseneck is lifted in place using bridge floor truck crane, suspension cable is hung and carries out first time cable tension;
S6. reinforcing bar is installed and prestressing force, this section section concrete pours 50% carry out second of tensioning of suspension cable, pour residue 50% concrete, concrete curing, tensioning beam body prestressing force and mud jacking, stay cable force are converted by Hanging Basket to beam bottom;
S7. bridge floor prefabricated board is installed using bridge floor truck crane, carries out wet seam construction, complete the tensioning of suspension cable third time, The next segment of hanging basket advancing construction;
Further, in step sl, Hanging Basket promotes the balance that keep across side load in girder side, need to symmetrically promote extension Basket;
Further, in step s 2, Hanging Basket anchor system undertakes Hanging Basket weight by front and back anchor beam altogether, and front and back anchor beam has respectively 8 φ 40mm fining twisted steel compositions;Walking system is made of forward and backward walking sunpender group with anti-idler wheel;
Further, in step s 2, the anti-idler wheel in Hanging Basket rear end is installed in place before suspended basket, and with beam bottom concrete surface Contact, with balance Hanging Basket walking when before go all out;
Further, in step s3, suspended basket promotes platform hanging basket to beam bottom afterwards in place, is by anchoring before and after bridge floor The jack pair platform hanging basket being arranged in system carries out elevation adjustment;
It further, in step s 4, will be between thrust block and counter-force seat before pull cord system first time cable tension Gap plug is real, and when girder pours, horizontal component force of stayed cable can be transmitted to and be poured concrete segment by thrust mechanism;
Further, in step s 5, between platform hanging basket and gooseneck, horizontal limit devices are equipped with, when for pouring Two Hanging Baskets of same working face are temporarily connected, while balancing the transverse horizontal force of suspension cable generation;
Further, in step s 5, suspension cable first time tensioning is realized by Hanging Basket front end pull cord system, is used The method of single hanging cable single tendon stretch;
Further, in step s 6, Hanging Basket front end is provided with pull cord system, and suspension cable is three-dimensional system, and pull cord system is set Be calculated as arc girder construction, the function of pull cord system be suspension cable is connected with Hanging Basket in cradle cantilever construction to be formed before prop up Point, to reduce the interim internal force peak value of middle girder of constructing;After the completion of cantilever, suspension cable is separated with Hanging Basket, realizes turning for Suo Li It changes;
Further, in step s 6, second of tensioning of suspension cable is real using large-tonnage jack integral tension by beam-ends Existing;
Further, the Suo Li conversion Suo Li certain by Hanging Basket front end pull cord system large-tonnage jack tension, by oblique pull Rope is transferred in beam body by Hanging Basket anchoring and is anchored;
Further, in step 7, suspension cable third time tensioning passes through tower end large-tonnage jack for cable tension to mesh Scale value.
The beneficial effects of the present invention are: this construction method utilizes the design of downstriker dragging suspension basket, can be preferably applied for The construction of the girder cantilever section of the bilateral concrete girder of wide width wing edge+gooseneck composite structure beam and wide width wing listrium.Its characteristics are as follows: (1) girder intermediate transverse girder is gooseneck, and floorings are precast slab, and crossbeam and floorings are all made of bridge floor truck crane peace Dress, Hanging Basket are only used for pouring girder two sides rectangular beam rib, flange plate, ribbed stiffener and tooth block, and every group of Hanging Basket can be divided into two independences Hanging Basket is connected using transverse connection, mitigates cradle structure weight;(2) main bridge suspension cable is space Shuan Suo face sector arrangement, is drawn Rope position is changed in three-dimensional space, therefore Hanging Basket pull cord system fixing end is also wanted to move in three-dimensional space relative to Hanging Basket; (3) girder outer side wing edge board width 4.5m, structure is weaker, can not pour the traveling of girder top surface using C-shaped hook hanging.
Detailed description of the invention
The invention will be further described with reference to the accompanying drawings and examples:
Fig. 1 is downstriker dragging suspension basket structure chart
Fig. 2 is the A-A cross-sectional view in Fig. 1;
Fig. 3 is the B-B cross-sectional view in Fig. 1.
Specific embodiment
The bilateral concrete girder of wide width wing edge and gooseneck composite structure beam and its construction method of the present embodiment, including it is following Step:
Step 1: Hanging Basket uses long platform formula dragging suspension basket, it is designed according to standard beam section 7.6m, separate unit self weight 86t, One standard beam section construction needs two Hanging Basket integrations of operation.Hanging Basket is by platform hanging basket 3, pull cord system, running gear 1, anchoring system The composition such as system 8, template system 7, thrust mechanism 2, tensioning platform 5.
Step 2: promoting platform hanging basket 3 using the jack in forward and backward anchor pole group, jack and pad is arranged in Hanging Basket tail end Block 4 withstand on beams of concrete bottom surface, prevent Hanging Basket from leaning forward, while anchor pole group promotes platform hanging basket 3, the jack of Hanging Basket tail end Top lifting simultaneously and pad keep 3 head and the tail both ends of platform hanging basket in same plane, 3 whole height of platform hanging basket are made to promote 1200mm To beam bottom;Pass through measurement observation adjustment 3 elevation of platform hanging basket to design value simultaneously.
Step 3: thrust mechanism 2 is made of built-in fitting, counter-force seat and thrust block.Built-in fitting uses 12 ∠ 100 × 10 Angle steel is welded with steel plate, and gusset is welded on angle steel and welds anchor slab in tail end, to increase anchor force.Built-in fitting is pre-buried in advance In previous segment beams of concrete, built-in fitting surface of steel plate is concordant with beams of concrete bottom surface, and counter-force seat and built-in fitting steel plate weld, Thrust block is connect by bolt with 3 main longitudinal grider of platform hanging basket.Before pull cord system first time cable tension, by thrust block with Gap between counter-force seat is filled in fact, and when girder pours, horizontal component force of stayed cable can be transmitted to and be poured concrete section by thrust mechanism 2 Section.
Step 4: measurement and positioning goes out suspension cable anchoring tooth block position on Hanging Basket bed die, suspension cable tooth block template is installed, The practical anchor point of measurement and positioning cable guide pipe in tooth block template is installed stiff skeleton and cable guide pipe, is fixed temporarily using stiff skeleton Cable guide pipe, measurement cable guide pipe central axes vertex (at the top of cable guide pipe nozzle), hand-off repetition measurement checks cable guide pipe positioning accuracy, and rope is led Pipe is fixed on stiff skeleton.
Gooseneck is transported to designated position under bridge by transport vehicle first, and by bridge floor truck crane vertical-lift to bridge floor, Hanging Basket is flat 4 spiral tube columns are arranged on platform 3 to position and support for gooseneck, accurate measurement and positioning goes out to install flat on spiral tube column Face position, snap the line mark, and truck crane lifting gooseneck is in place, check that installation error is simultaneously rectified a deviation, steel plate is used to carry out pad Gooseneck is adjusted to design altitude, it is firm that gooseneck is fixed using reinforcing bar.
Step 5: installation reinforcing bar and prestressing force, using concrete pump casting concrete, this section section concrete is poured 50% carries out second of tensioning of suspension cable, pours remaining 50% concrete, concrete curing, tensioning beam body prestressing force and mud jacking, Stay cable force is converted by Hanging Basket to beam bottom.
Step 6: bridge floor prefabricated board is transported to designated position under bridge by transport vehicle first, extremely by the vertical-lift of bridge floor truck crane Bridge floor, accurate measurement and positioning goes out the mounting plane position of bridge floor prefabricated board on gooseneck, and snap the line marks, and installs rubber pad Piece, truck crane lifting bridge floor prefabricated board is in place, checks installation error, correction of deviation, and installation binds wet seam reinforcing bar, pours wet connect Stitch concrete, maintenance;Complete the tensioning of suspension cable third time, the next segment of hanging basket advancing construction.
Finally, it is stated that the above examples are only used to illustrate the technical scheme of the present invention and are not limiting, although referring to compared with Good embodiment describes the invention in detail, those skilled in the art should understand that, it can be to skill of the invention Art scheme is modified or replaced equivalently, and without departing from the objective and range of technical solution of the present invention, should all be covered at this In the scope of the claims of invention.

Claims (9)

1. a kind of concrete girder gooseneck composite structure beam cradle construction method, which comprises the following steps:
S1. assembled platform hanging basket in the venue, and Hanging Basket is promoted to beam bottom and is anchored at and has poured beam section;Using lateral connection Frame body is integral by two Hanging Baskets connection of left and right sides;Hanging Basket is by platform hanging basket, pull cord system, running gear, anchor system, mould Plate system, thrust mechanism, tensioning platform composition;
S2. the Hanging Basket is converted into walking system by anchor system and moves forward to next segment to be poured, and Hanging Basket is again by traveling System is converted into anchor system;
S3. the platform hanging basket is promoted to beam bottom, and elevation adjustment is carried out to platform hanging basket according to monitoring formwork erection instruction;
S4. thrust mechanism is made of built-in fitting, counter-force seat and thrust block;To the pre-buried built-in fitting of the beam bottom and counter-force seat It is welded, the thrust block of the platform hanging basket with the soldered counter-force seat hold out against closely connected to bear jointly The horizontal thrust of Hanging Basket backward;
S5. assembled cantilever segment bed die and side form, measurement and positioning cable guide pipe place gooseneck positioning on the inside of the platform hanging basket Bearing beam is supported, gooseneck is lifted in place, suspension cable is hung and carries out first time cable tension;
S6., reinforcing bar and prestressing force are installed, second of tensioning is carried out to the suspension cable in this section section concrete casting process;This After the completion of the concreting of segment, implement concrete curing and tensioning beam body prestressing force and mud jacking, the Suo Liyou of the suspension cable Hanging Basket is converted to beam bottom;
S7. it lifts bridge floor prefabricated board and completes the third time tensioning of the suspension cable, the hanging basket advancing to next construction segment.
2. concrete girder gooseneck composite structure beam cradle construction method according to claim 1, it is characterised in that: step In rapid S1, the balance across side load in girder side should be kept in the Hanging Basket lifting process, need to symmetrically promote Hanging Basket.
3. concrete girder gooseneck composite structure beam cradle construction method according to claim 1, it is characterised in that: step In rapid S2, the Hanging Basket anchor system is undertaken the weight of Hanging Basket by forward and backward anchor beam, and the forward and backward anchor beam passes through finish rolling screw thread Steel makes to be formed;The walking system includes forward and backward walking sunpender group and anti-idler wheel;The Hanging Basket should will be after Hanging Basket before traveling The anti-idler wheel at end is installed in place, and is contacted with beam bottom concrete surface, when balancing Hanging Basket walking before go all out.
4. concrete girder gooseneck composite structure beam cradle construction method according to claim 1, it is characterised in that: institute It states in step S3, the suspended basket promotes platform hanging basket to beam bottom afterwards in place, and thousand by being arranged on bridge floor anchor system Jin top carries out elevation adjustment to platform hanging basket.
5. concrete girder gooseneck composite structure beam cradle construction method according to claim 1, it is characterised in that: step In rapid S4, before the pull cord system first time cable tension, the gap between thrust block and counter-force seat should be filled in real;Girder When pouring, horizontal component force of stayed cable can be transmitted to and be poured concrete segment by the thrust mechanism.
6. concrete girder gooseneck composite structure beam cradle construction method according to claim 1, it is characterised in that: step In rapid S5, horizontal limit devices are set between the platform hanging basket and gooseneck, which is used for when pouring Two Hanging Baskets of same working face are connected, temporarily to balance the transverse horizontal force of suspension cable generation;The first time of the suspension cable Tensioning is completed by Hanging Basket front end pull cord system using the method for single hanging cable single tendon stretch.
7. concrete girder gooseneck composite structure beam cradle construction method according to claim 1, it is characterised in that: step In rapid S6, the Hanging Basket front end is provided with the pull cord system of arc girder construction, and the pull cord system is used in cradle cantilever construction When connect suspension cable and Hanging Basket to form front fulcrum, to reduce the interim internal force peak value of middle girder of constructing, and completed in cantilever Afterwards, suspension cable is separated with Hanging Basket, realizes the conversion of Suo Li.
8. concrete girder gooseneck composite structure beam cradle construction method according to claim 1, it is characterised in that: step In rapid S6, second of tensioning of the suspension cable is realized by the jack integral tension being arranged in beam-ends.
9. concrete girder gooseneck composite structure beam cradle construction method according to claim 1, it is characterised in that: step In rapid S7, the third time tensioning of the suspension cable is by the jack at tower end by cable tension to target value.
CN201710514245.XA 2017-06-29 2017-06-29 Concrete girder gooseneck composite structure beam cradle construction method Active CN107268455B (en)

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110004839A (en) * 2019-04-18 2019-07-12 联建建设工程有限公司 Large span front fulcrum dragging suspension basket installation method

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1123861A (en) * 1995-08-28 1996-06-05 铁道部大桥工程局 Construction of prestressed concrete stayed cable bridge
CN103437302A (en) * 2013-08-21 2013-12-11 中交二公局第一工程有限公司 Hanging basket construction method for suspension pouring section of single cable plane cable-stayed bridge
CN104120659A (en) * 2014-08-15 2014-10-29 山东省路桥集团有限公司 Descending type suspended scaffold
CN104631324A (en) * 2014-12-17 2015-05-20 上海市基础工程集团有限公司 Front supporting point hanging basket construction process used for inclined pull bridge super-wide flange girder
CN205348005U (en) * 2016-02-02 2016-06-29 北京城建道桥建设集团有限公司 Construction operation combination platform of basket is hung to cable -stay bridge guy rope
CN205474872U (en) * 2016-03-18 2016-08-17 中交武汉港湾工程设计研究院有限公司 Basket is hung in two cable face limit case broad width girder constructions
KR20170014821A (en) * 2015-07-31 2017-02-08 대림산업 주식회사 Cable-Stayed Bridge having Precast Core, and Constructing Method thereof

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1123861A (en) * 1995-08-28 1996-06-05 铁道部大桥工程局 Construction of prestressed concrete stayed cable bridge
CN103437302A (en) * 2013-08-21 2013-12-11 中交二公局第一工程有限公司 Hanging basket construction method for suspension pouring section of single cable plane cable-stayed bridge
CN104120659A (en) * 2014-08-15 2014-10-29 山东省路桥集团有限公司 Descending type suspended scaffold
CN104631324A (en) * 2014-12-17 2015-05-20 上海市基础工程集团有限公司 Front supporting point hanging basket construction process used for inclined pull bridge super-wide flange girder
KR20170014821A (en) * 2015-07-31 2017-02-08 대림산업 주식회사 Cable-Stayed Bridge having Precast Core, and Constructing Method thereof
CN205348005U (en) * 2016-02-02 2016-06-29 北京城建道桥建设集团有限公司 Construction operation combination platform of basket is hung to cable -stay bridge guy rope
CN205474872U (en) * 2016-03-18 2016-08-17 中交武汉港湾工程设计研究院有限公司 Basket is hung in two cable face limit case broad width girder constructions

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