CN110820602A - Single-segment box girder bridge girder erection machine and operation method thereof - Google Patents

Single-segment box girder bridge girder erection machine and operation method thereof Download PDF

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Publication number
CN110820602A
CN110820602A CN201911265906.5A CN201911265906A CN110820602A CN 110820602 A CN110820602 A CN 110820602A CN 201911265906 A CN201911265906 A CN 201911265906A CN 110820602 A CN110820602 A CN 110820602A
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CN
China
Prior art keywords
girder
bridge
erection machine
supporting
machine
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
CN201911265906.5A
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Chinese (zh)
Inventor
张昶
叶业
魏民
王浩
罗璐
高果
穆帮桥
黄�俊
王洪
刘前林
曾好
朱可
唐毅
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.)
CHONGQING COMMUNICATIONS CONSTRUCTION (GROUP) Co.,Ltd.
Chongqing Construction Engineering Group Co Ltd
Original Assignee
张昶
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 张昶 filed Critical 张昶
Priority to CN201911265906.5A priority Critical patent/CN110820602A/en
Publication of CN110820602A publication Critical patent/CN110820602A/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
    • E01D21/10Cantilevered erection
    • E01D21/105Balanced cantilevered erection
    • 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
    • E01D21/00Methods or apparatus specially adapted for erecting or assembling bridges
    • E01D21/06Methods or apparatus specially adapted for erecting or assembling bridges by translational movement of the bridge or bridge sections

Abstract

The invention discloses a single-section box girder bridge girder erection machine and an operation method thereof, which solve the erection problem of a single-section box girder in the bridge girder erection process, are light, safe and reliable, can be quickly disassembled and transferred, and solve the problems that the existing operation platform is inconvenient to carry out wet joint construction and beam bottom modification. Including bent cap and base, the outside fixed mounting of bent cap has the bridging machine girder, the upper end fixedly connected with supporting beam of bridging machine girder, supporting beam's upper end fixedly connected with nose girder, the upper end fixed mounting of nose girder has the jack-up overhead traveling crane, supplementary landing leg before the lower extreme fixedly connected with of nose girder, landing leg in the lower extreme fixedly connected with of nose girder, supplementary landing leg behind the lower extreme fixedly connected with of nose girder, the lower extreme fixed mounting of well landing leg has the tie-beam, single platform festival section case roof beam is installed to the lower extreme of tie-beam.

Description

Single-segment box girder bridge girder erection machine and operation method thereof
Technical Field
The invention relates to a single segmental box girder bridge girder erection machine, in particular to a single segmental box girder bridge girder erection machine and an operation method thereof.
Background
The bridge girder erection machine is equipment for placing prefabricated beam pieces on a prefabricated bridge pier. Bridge girder erection machines belong to the crane category, as their main function is to lift the beam piece up and then transport it into position and put it down. Bridge cranes are very different from cranes in general. The required conditions are harsh, and the beam piece runs upwards or is called longitudinal movement.
The bridge construction machine runs on a highway or a railway track and is used for erecting a small span beam on the whole span. Because the bridging work efficiency is high, the erection is considered as a design principle in the standard design of the Chinese railway bridge. The machine body is large and exceeds a railway transportation limit, needs to be disassembled for transportation, and is assembled for use after reaching a construction site. The bridge girder erection machine which is commonly provided in China has three types, and is mainly used for erecting reinforcing steel bars or prestressed concrete beams in a slicing mode. The specified heights of the two sides of the longitudinal running track of the bridge girder erection machine are required to be correspondingly level, and the stability is kept. The front, middle and rear supporting legs are required to be horizontal in transverse running tracks, the distance is strictly controlled, and the three tracks must be parallel. The bridge girder erection machine is also provided with a hydraulic system, an electrical system, a diesel generator set, a safety protection monitoring system and the like.
The bridge girder erection machine is divided into a highway bridge erection machine, a conventional railway bridge erection machine, a passenger-dedicated railway bridge erection machine and the like. When the bridge girder erection machine is used for erecting a single section box girder, the conventional mode is heavier, and the self weight of the equipment support frame is larger, so that the equipment support frame is inconvenient to rapidly disassemble, assemble and transfer. And the operation platform is inconvenient for wet joint construction and beam bottom modification. Accordingly, there is a need for improvements in the art.
Disclosure of Invention
The invention aims to provide a single-section box girder erection machine and an operation method thereof, which solve the erection problem of a single-section box girder in the process of erection, are light, safe and reliable, can be quickly disassembled and assembled and transferred, and solve the problems that the existing operation platform is inconvenient to carry out wet joint construction and beam bottom modification.
The purpose of the invention can be realized by the following technical scheme:
a bridge girder erection machine of a single section box girder comprises a cover girder and a base, wherein a main girder of a bridge erection machine is fixedly arranged on the outer side of the cover girder, a supporting beam is fixedly connected to the upper end of the main girder of the bridge erection machine, a guide girder is fixedly connected to the upper end of the supporting beam, a hoisting crown block is fixedly arranged at the upper end of the guide girder, a front auxiliary supporting leg is fixedly connected to the lower end of the guide girder, a middle supporting leg is fixedly connected to the lower end of the guide girder, a rear auxiliary supporting leg is fixedly connected to the lower end of the guide girder, a connecting girder is fixedly arranged at the lower end of the middle supporting leg, and a single section box girder;
the base and ground fixed connection, the upper end fixedly connected with supporting seat of base, the upper end fixedly connected with steel support column of supporting seat, the upper end fixedly connected with I-steel of support column supports, a husky section of thick bamboo is adjusted to the upper end fixedly connected with of I-steel support, adjust the upper end fixedly connected with regulation voussoir of a husky section of thick bamboo, adjust the contact of voussoir and the cantilever bottom of bent cap.
Preferably, the middle part of the steel support column is provided with a support pull rod through a bolt, and the support pull rod is fixedly connected with the cover beam through a bolt.
Preferably, the adjusting wedge block is composed of two wedge blocks and a pull rod, and nuts are arranged on two sides of the pull rod.
Preferably, the supporting seat, the supporting column and the I-shaped steel support are in a welded structure.
Preferably, the guide beam is in a rectangular truss structure form, the chord member is an I-shaped beam formed by welding steel plates, and the web member is a box-shaped member formed by buckling channel steel.
Preferably, the middle supporting leg is provided with a jacking, transverse moving and longitudinal moving oil cylinder.
An operation method of a single section box girder bridge girder erection machine comprises the following specific steps:
the method comprises the following steps: constructing a lower structure, hoisting a middle fulcrum pier top block through a bridge girder erection machine after the lower structure is completed, and temporarily fixing the middle fulcrum pier top block;
step two: hoisting the first span box girder, adjusting the position of the box girder segment, and pre-assembling;
step three: coating adhesive on the matching surfaces of the first two box beams, matching and positioning the two box beams, applying temporary prestress to squeeze and solidify, and repeating the steps to assemble the box beams into a No. eleven block;
step four: installing a wet joint template, pouring a wet joint and maintaining, hoisting an advanced pier top block by using a hoisting crown block, and anchoring;
step five: after the wet joint pouring concrete reaches%, symmetrically tensioning external prestress in batches, unloading the whole machine after tensioning is finished, dismantling the hanger, and transporting the hanger to the ground;
step six: after the overhead traveling crane is used for carrying out spanning type transportation, supporting legs in the piers reach the advanced pier and are anchored well;
step seven: the bridge girder erection machine longitudinally moves forwards, the crown block is positioned in front of the main framework and used as a balance weight, and the posture of the bridge girder erection machine is longitudinally moved to the right position and adjusted;
step eight: assembling the midspan main beams according to the first-span sequence, and pouring wet joints;
step nine: when the strength of the concrete reaches%, symmetrically tensioning the mid-span prestress in batches;
step ten: constructing a tail span main beam to finish post-tensioning negative bending moment prestress steel bundles;
step eleven: bridge deck pavement and accessory facility installation.
The invention has the beneficial effects that: the scheme adopts the segmental assembling bridge girder erection machine to hang, assemble and erect a single whole hole, then transversely move to finish another whole hole hanging, assembling and erecting, and longitudinally move to a new span to finish erection after double whole holes are finished.
The bridge girder erection machine walks in a walking way and can automatically shift through holes, the support leg transportation adopts an automatic crossing type support leg transportation way, and the transverse moving rail can also automatically transport the support leg; the beam feeding mode of the bridge girder erection machine meets the beam feeding under the bridge, and the beam feeding at the front part and the tail part is considered; the bridge girder erection machine can meet the requirement of wet joint construction, and is provided with a movable beam bottom operation platform, so that the beam bottom operation platform can carry out both wet joint construction and beam bottom modification; the bridge girder erection machine has the function of erecting a pier top (or a beam end block) block by self; the front auxiliary pier supporting frame of the front supporting leg pier of the bridge girder erection machine is light, safe and reliable and can be quickly disassembled and assembled and transferred.
Drawings
In order to facilitate understanding for those skilled in the art, the present invention will be further described with reference to the accompanying drawings.
FIG. 1 is a schematic view of the overall structure of the present invention;
FIG. 2 is a schematic view of the canopy support structure of the present invention;
FIG. 3 is an enlarged view of a detail of area A of FIG. 2 according to the present invention;
FIG. 4 is a flow chart of the assembly of the present invention;
FIG. 5 is a schematic illustration of the assembly of step one of the present invention;
FIG. 6 is a schematic diagram of the assembly of step two of the present invention;
FIG. 7 is a schematic diagram of the assembly of step three of the present invention;
FIG. 8 is a schematic diagram of the assembly of step four of the present invention;
FIG. 9 is a schematic diagram of the assembly of step five of the present invention;
FIG. 10 is a schematic diagram of the assembly of step six of the present invention;
FIG. 11 is a diagram illustrating a seventh assembly process according to the present invention;
FIG. 12 is a schematic view of the assembly of step eight of the present invention;
FIG. 13 is a schematic diagram of the assembly of step nine of the present invention;
FIG. 14 is a schematic diagram of a tenth assembly of the present invention;
FIG. 15 is an assembly diagram illustrating the eleventh step of the present invention.
In the figure: 1. a capping beam; 2. a main beam of the bridge erecting machine; 3. a support beam; 4. a guide beam; 5. a hoisting crown block; 6. a front auxiliary leg; 7. a middle support leg; 8. a rear auxiliary leg; 9. a connecting beam; 10. a single segmental box girder; 11. a base; 12. a supporting seat; 13. a steel support column; 14. a support pull rod; 15. i-shaped steel support; 16. adjusting the sand cylinder; 17. the wedge is adjusted.
Detailed Description
The technical solutions of the present invention will be described clearly and completely with reference to the following embodiments, and it should be understood that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1-15, a single segment box girder bridge girder erection machine comprises a cover girder 1 and a base 11, a main girder 2 of the bridge girder erection machine is fixedly installed at the outer side of the cover girder 1, the main girder 2 of the bridge girder erection machine is a main body supporting structure of the bridge girder erection machine and provides stable support for the whole bridge girder erection machine, the width of a flange plate of the main girder 2 of the bridge girder erection machine is 1.4m, the height of the girder is 2.8m, the total length is 33m (divided into 3 segments and the length of the segments is 11m), the segments are connected by high-strength bolts, the segments can be transported by roads or railways after being disassembled, tracks for a front auxiliary supporting leg support and a hanging wheel traveling are arranged at the bottom of an upper cover plate and a lower cover plate of a lower flange plate, a machine arm is fixedly connected with a middle supporting leg 7 and a rear auxiliary supporting leg 8 by the high-strength bolts, the front auxiliary supporting leg 6 can move relative to the machine arm when longitudinally moving, a supporting beam 3 is fixedly connected with, the supporting beam 3 is a structural beam and has a supporting function, the upper end of the supporting beam 3 is fixedly connected with a guide beam 4, the height of the guide beam 4 is 2.8m, the length of a single guide beam is 46m (the length of the guide beam is 33.5: 11+11+1.5, the length of a rear guide beam is 12.5: 11+1.5), the upper end of the guide beam 4 is fixedly provided with a crane 5, the crane 5 is a main working unit of the bridge girder erection machine and is provided with an 80t hoisting mechanism hoist and a control and operation system, the total weight of the crane is 40t, the weight of a hoisting lug of the hoisting trolley is returned by 9.4t, the equivalent weight of a metal structure hoisting trolley running mechanism is 17.5t, the overall dimension (the height of the crane multiplied by the track distance multiplied by the span) is 8.8.8.8 multiplied by 3.6 m, the crane 5 adopts a concave structure frame, the running mechanism adopts chain transmission traction and a heavy load-bearing running mode, the hoisting trolley is driven by a motor, a speed reducer is concealed in a planetary gear hoist, the high-speed shaft of the hoisting mechanism and the winding drum are both provided with braking devices, the high-speed shaft adopts a hydraulic push rod brake as a conventional operation brake, and the motor is connected with the speed reducer through a gear coupling with a brake wheel; the low-speed stage adopts a hydraulic disc brake as emergency brake to ensure safe and reliable operation of the hanging beam, a lifting mechanism comprises a lifting winch, a movable pulley block, a fixed pulley block, a balance pulley and the like, the multiplying power of the pulley block is 2 multiplied by 16, wherein a load sensor is installed on a balance pulley frame and can reflect lifting load in real time, the lifting winch is a built-in winch of a motor-driven planetary gear reducer, a motor is provided with a brake device, a lifting mechanism of a lifting crown block 5 adopts a driving rope arranger to arrange ropes, the rope arranger comprises a variable frequency motor, a chain wheel, a chain, a lead screw, a nut, a guide rod, a support, a guide roller and the like to form a transmission mechanism, is a follow-up system and forms closed-loop. The winch rotates for one circle, the guide roller of the rope guider transversely moves for a distance of the diameter of a steel wire rope, the guide roller moves to one end, the steel wire rope is wound on a winding drum for one layer, the guide roller reversely moves through a proximity switch to start winding of the second layer of the steel wire rope, the lower end of a guide beam 4 is fixedly connected with a front auxiliary supporting leg 6, the front auxiliary supporting leg 6 is supported on an upright post of a front pier bearing platform and is mainly used for reversely transporting a rear auxiliary supporting leg 8 and a middle supporting leg 7 during overspan, the overall size of the assembled front auxiliary supporting leg 6 is 6.5 multiplied by 5.12 multiplied by 0.8m, the auxiliary front supporting leg 6 mainly comprises a riding wheel mechanism, a folding post, a telescopic post and the like, a hinged structure is longitudinally fixed with the machine arm during beam erecting operation to form a flexible supporting leg, a portal frame structure is formed by the machine arm and the middle supporting leg 7, the requirement of erecting operation is met, and the auxiliary front supporting, the walking longitudinal movement of the bridge girder erection machine is realized, the auxiliary front supporting leg 6 is provided with a folding mechanism, the requirement of supporting an upper bridge abutment of the auxiliary front supporting leg during the erection of a normal bridge girder and a last box girder is met, the lower end of the guide beam 4 is fixedly connected with a middle supporting leg 7, the middle supporting leg 7 is used for supporting and jacking the whole bridge girder erection machine, particularly the supporting during the full-load construction of the bridge girder erection machine, a jacking, transverse moving and longitudinal moving oil cylinder is arranged on the middle supporting leg, the action of the bridge girder erection machine is driven, the overall size of the assembled single middle supporting leg 7 is 8.2 x 3.13 x 2.02m, the total weight of the single middle supporting leg 7 is 30t, the middle supporting leg 7 realizes the support and the removal of a sleeper through a hydraulic oil cylinder, the requirements of stable support during the step changing during the longitudinal movement and the girder erection operation are met, the transverse moving mechanism is arranged under the two supporting legs, a second column is pushed through the transverse moving oil cylinder to drive an arm to swing head, so that, the lower cross beam is designed to be detachable, the lower end of the guide beam 4 is fixedly connected with a rear auxiliary supporting leg 8, the rear auxiliary supporting leg 8 is supported on the beam surface and used for transporting a rear middle supporting leg 7 backwards and replacing the middle supporting leg 7 to play a supporting role (three-point support) until the bridge girder erection machine is in a maximum rear cantilever state, the rear auxiliary supporting leg 8 can be hung on the rear guide beam and longitudinally moves forwards along with the main frame, the overall size of the assembled single rear auxiliary supporting leg 8 is 7.64 x 3.85 x 1.76m, the total weight of the single rear auxiliary supporting leg 8 is 12t, the lower end of the middle supporting leg 7 is fixedly provided with a connecting beam 9, the lower end of the connecting beam 9 is provided with a single-section box beam 10, and the single-section box beam 10 is prefabricated by;
base 11 and ground fixed connection, base 11 is the cast in situ concrete pier base, base 11's upper end fixedly connected with supporting seat 12, base 11 provides bearing structure for supporting seat 12, the upper end fixedly connected with steel support column 13 of supporting seat 12, the upper end fixedly connected with I-steel of support column 13 supports 15, base 11, supporting seat 12 and steel support column 13 are welded structure, constitute the main part bearing structure of the cantilever of bent cap 1, the husky section of thick bamboo 16 is adjusted to the upper end fixedly connected with of I-steel support 15, adjust the upper end fixedly connected with regulation voussoir 17 of husky section of thick bamboo 16, adjust voussoir 17 and the cantilever bottom contact of bent cap 1.
The middle part of the steel support column 13 is provided with a support pull rod 14 through a bolt, the support pull rod 14 is fixedly connected with the bent cap 1 through a bolt, the steel support column 13 can be supported in an auxiliary mode through the installation of the support pull rod 14, the steel support column 13 is prevented from being inclined, an adjusting wedge block 17 is composed of two wedge blocks and a pull rod, nuts are installed on two sides of the pull rod, the adjusting wedge block 17 is pulled through a connecting rod, the adjusting wedge block can be adjusted, settlement compensation is convenient to conduct, the support base 12, the steel support column 13 and the I-shaped steel support 15 are of a welding structure, a support structure of a cantilever is formed, the guide beam 4 is of a rectangular truss structure, the chord is an I-shaped beam formed by splicing and welding steel plates, the web is a box-shaped rod piece formed by buckling channel steel, the middle support leg 7 is provided with a jacking, transverse.
An operation method of a single section box girder bridge girder erection machine comprises the following specific steps:
the method comprises the following steps: constructing a lower structure, hoisting a middle fulcrum pier top block through a bridge girder erection machine after the lower structure is completed, and temporarily fixing the middle fulcrum pier top block;
step two: hoisting the first span box girder, adjusting the position of the box girder segment, and pre-assembling;
step three: coating adhesive on the matching surfaces of the first two box beams, matching and positioning the two box beams, applying temporary prestress to squeeze and solidify, and repeating the steps to assemble the box beams into a No. eleven block;
step four: installing a wet joint template, pouring a wet joint and maintaining, hoisting an advanced pier top block by using a hoisting crown block, and anchoring;
step five: when the wet joint pouring concrete reaches 95%, stretching external prestress symmetrically in batches, unloading the whole machine after stretching is finished, dismantling the hanger, and transporting the hanger to the ground;
step six: after the overhead traveling crane is used for carrying out spanning type transportation, supporting legs in the piers reach the advanced pier and are anchored well;
step seven: the bridge girder erection machine longitudinally moves forwards, the crown block is positioned in front of the main framework and used as a balance weight, and the posture of the bridge girder erection machine is longitudinally moved to the right position and adjusted;
step eight: assembling the midspan main beams according to the first-span sequence, and pouring wet joints;
step nine: when the strength of the concrete reaches 95%, symmetrically tensioning the mid-span prestress in batches;
step ten: constructing a tail span main beam to finish post-tensioning negative bending moment prestress steel bundles;
step eleven: bridge deck pavement and accessory facility installation.
The invention has the beneficial effects that: the scheme adopts the segmental assembling bridge girder erection machine to hang, assemble and erect a single whole hole, then transversely move to finish another whole hole hanging, assembling and erecting, and longitudinally move to a new span to finish erection after double whole holes are finished.
The bridge girder erection machine walks in a walking way and can automatically shift through holes, the support leg transportation adopts an automatic crossing type support leg transportation way, and the transverse moving rail can also automatically transport the support leg; the beam feeding mode of the bridge girder erection machine meets the beam feeding under the bridge, and the beam feeding at the front part and the tail part is considered; the bridge girder erection machine can meet the requirement of wet joint construction, and is provided with a movable beam bottom operation platform, so that the beam bottom operation platform can carry out both wet joint construction and beam bottom modification; the bridge girder erection machine has the function of erecting a pier top (or a beam end block) block by self; the front auxiliary pier supporting frame of the front supporting leg pier of the bridge girder erection machine is light, safe and reliable and can be quickly disassembled and assembled and transferred.
The preferred embodiments of the invention disclosed above are intended to be illustrative only. The preferred embodiments are not intended to be exhaustive or to limit the invention to the precise embodiments disclosed. Obviously, many modifications and variations are possible in light of the above teaching. The embodiments were chosen and described in order to best explain the principles of the invention and the practical application, to thereby enable others skilled in the art to best utilize the invention. The invention is limited only by the claims and their full scope and equivalents.

Claims (7)

1. The utility model provides a single section case roof beam bridging machine, includes bent cap (1) and base (11), its characterized in that: the outer side of the bent cap (1) is fixedly provided with a main bridge of the bridge erecting machine (2), the upper end of the main bridge of the bridge erecting machine (2) is fixedly connected with a supporting beam (3), the upper end of the supporting beam (3) is fixedly connected with a guide beam (4), the upper end of the guide beam (4) is fixedly provided with a hoisting overhead crane (5), the lower end of the guide beam (4) is fixedly connected with a front auxiliary supporting leg (6), the lower end of the guide beam (4) is fixedly connected with a middle supporting leg (7), the lower end of the guide beam (4) is fixedly connected with a rear auxiliary supporting leg (8), the lower end of the middle supporting leg (7) is fixedly provided with a connecting beam (9), and the lower end of the connecting beam (9) is provided with;
base (11) and ground fixed connection, the upper end fixedly connected with supporting seat (12) of base (11), the upper end fixedly connected with steel support column (13) of supporting seat (12), the upper end fixedly connected with I-steel of support column (13) supports (15), the sand section of thick bamboo (16) is adjusted to the upper end fixedly connected with of I-steel support (15), adjust the upper end fixedly connected with regulation voussoir (17) of a sand section of thick bamboo (16), adjust the cantilever bottom contact of voussoir (17) and bent cap (1).
2. The bridge girder erection machine of the single-section box girder according to claim 1, wherein the middle of the steel support column (13) is installed with a support tie bar (14) by bolts, and the support tie bar (14) is fastened with the cap girder (1) by bolts.
3. The bridge girder erection machine according to claim 1, wherein the adjusting wedge (17) is composed of two wedges and a tie rod, and nuts are installed on both sides of the tie rod.
4. The bridge girder erection machine according to claim 1, wherein the supporting base (12), the supporting columns (13) and the I-steel supports (15) are welded structures.
5. The bridge girder erection machine of a single-section box girder according to claim 1, wherein the guide girder (4) is in the form of a rectangular truss structure, the chord member is an i-beam formed by welding steel plates, and the web member is a box-shaped member formed by buckling steel plates.
6. The bridge girder erection machine of single-section box girder according to claim 1, wherein the middle support leg (7) is provided with a jacking, transverse-moving and longitudinal-moving oil cylinder.
7. An operation method of a single section box girder bridge girder erection machine is characterized by comprising the following specific steps:
the method comprises the following steps: constructing a lower structure, hoisting a middle fulcrum pier top block through a bridge girder erection machine after the lower structure is completed, and temporarily fixing the middle fulcrum pier top block;
step two: hoisting the first span box girder, adjusting the position of the box girder segment, and pre-assembling;
step three: coating adhesive on the matching surfaces of the first two box beams, matching and positioning the two box beams, applying temporary prestress to squeeze and solidify, and repeating the steps to assemble the box beams into a No. eleven block;
step four: installing a wet joint template, pouring a wet joint and maintaining, hoisting an advanced pier top block by using a hoisting crown block, and anchoring;
step five: when the wet joint pouring concrete reaches 95%, stretching external prestress symmetrically in batches, unloading the whole machine after stretching is finished, dismantling the hanger, and transporting the hanger to the ground;
step six: after the overhead traveling crane is used for carrying out spanning type transportation, supporting legs in the piers reach the advanced pier and are anchored well;
step seven: the bridge girder erection machine longitudinally moves forwards, the crown block is positioned in front of the main framework and used as a balance weight, and the posture of the bridge girder erection machine is longitudinally moved to the right position and adjusted;
step eight: assembling the midspan main beams according to the first-span sequence, and pouring wet joints;
step nine: when the strength of the concrete reaches 95%, symmetrically tensioning the mid-span prestress in batches;
step ten: constructing a tail span main beam to finish post-tensioning negative bending moment prestress steel bundles; step eleven: bridge deck pavement and accessory facility installation.
CN201911265906.5A 2019-12-11 2019-12-11 Single-segment box girder bridge girder erection machine and operation method thereof Pending CN110820602A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201911265906.5A CN110820602A (en) 2019-12-11 2019-12-11 Single-segment box girder bridge girder erection machine and operation method thereof

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Application Number Priority Date Filing Date Title
CN201911265906.5A CN110820602A (en) 2019-12-11 2019-12-11 Single-segment box girder bridge girder erection machine and operation method thereof

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Publication Number Publication Date
CN110820602A true CN110820602A (en) 2020-02-21

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Application Number Title Priority Date Filing Date
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Country Link
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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112663514A (en) * 2020-12-21 2021-04-16 中建八局第三建设有限公司 Novel pier-beam integrated bridge girder erection machine

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112663514A (en) * 2020-12-21 2021-04-16 中建八局第三建设有限公司 Novel pier-beam integrated bridge girder erection machine

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