CN113026571A - Ultra-wide bridge hanging basket structure and implementation method - Google Patents
Ultra-wide bridge hanging basket structure and implementation method Download PDFInfo
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- CN113026571A CN113026571A CN202110337251.9A CN202110337251A CN113026571A CN 113026571 A CN113026571 A CN 113026571A CN 202110337251 A CN202110337251 A CN 202110337251A CN 113026571 A CN113026571 A CN 113026571A
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D21/00—Methods or apparatus specially adapted for erecting or assembling bridges
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D21/00—Methods or apparatus specially adapted for erecting or assembling bridges
- E01D21/10—Cantilevered erection
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Abstract
The invention discloses an ultra-wide bridge hanging basket structure and an implementation method; the hanging basket structure is realized by adopting a plurality of groups of main bearing beams and upright posts so as to ensure the bearing requirement of the ultra-wide beam; the hanging basket structure is also provided with a hanging basket bottom platform; the main bearing beam and the upright post are connected through an inclined pull belt, a bearing lower sliding rail is designed under the bottom platform of the hanging basket, the transverse span of the bottom rail is reduced, and the gravity of an overweight structure is shared during walking. The design of the invention solves the construction problem of any ultra-wide suspension casting section beam; the invention has the advantages that: (1) the development of super-wide section suspension casting bridges is promoted; (2) the construction of the current stage in multiple times is changed into one-time segmental casting, so that the construction quality, progress and cost are ensured; (3) the safety degree of the construction of the hanging basket is further improved through the structural design of the hanging basket.
Description
Technical Field
The invention relates to the field of civil engineering bridge construction, in particular to a hanging basket structure design and an implementation method suitable for bridge cantilever ultra-wide section construction.
Background
The cradle is the beginning of bridge construction large-span, but at present the traffic vigorously develops, and the traffic volume sharply increases day by day, and super wide bridge design also increases day by day, and because of reasons such as cradle design construction restriction, its width is still difficult to exceed steel structure bridge width for concrete cantilever section pouring bridge. At the present stage, the construction of the main ultra-wide hanging basket bridge is basically that the whole section is poured in several times, namely that the girder box chamber is poured firstly, and then the flange is poured afterwards. This conventional basket design of hanging has restricted super wide concrete bridge design, and the construction is loaded down with trivial details, and the inefficiency, the quality control degree of difficulty is big.
Disclosure of Invention
Therefore, in order to solve the above disadvantages, the present invention provides an ultra-wide bridge hanging basket structure and an implementation method thereof; the design of the invention solves the construction problem of any ultra-wide suspension casting section beam; the invention has the advantages that: (1) the development of super-wide section suspension casting bridges is promoted; (2) the construction of the current stage in multiple times is changed into one-time segmental casting, so that the construction quality, progress and cost are ensured; (3) the safety degree of the construction of the hanging basket is further improved through the structural design of the hanging basket.
The invention is realized in this way, construct a kind of ultra wide bridge and hang the basket structure, characterized by that; the hanging basket structure is realized by adopting a plurality of groups of main bearing beams and upright posts so as to ensure the bearing requirement of the ultra-wide beam; the hanging basket structure is also provided with a hanging basket bottom platform; the main bearing beam and the upright post are connected through an inclined pull belt, a bearing lower sliding rail is designed under the bottom platform of the hanging basket, the transverse span of the bottom rail is reduced, and the gravity of an overweight structure is shared during walking.
The ultra-wide bridge hanging basket structure is characterized in that the hanging basket structure comprises a hanging basket body and a hanging basket body; during walking, front supporting wheels and rear pressing wheels are designed at the front and the rear of the main bearing beam to ensure synchronous and safe walking of the ultra-wide cradle; the sliding friction of the roller is used for reducing resistance to ensure synchronism.
The ultra-wide bridge hanging basket structure is characterized in that the hanging basket structure comprises a hanging basket body and a hanging basket body; in order to meet the requirement of standard deflection during construction of the ultra-wide overweight segmental beam, a prestress applying part is designed on the upper bearing structure of the hanging basket.
The ultra-wide bridge hanging basket structure is characterized in that the hanging basket structure comprises a hanging basket body and a hanging basket body; the hanging basket structure is also provided with a front upper cross beam, a front lower cross beam and a rear lower cross beam; the ultra-wide hanging basket has high requirement on transverse rigidity, and the upper and lower beams of the hanging basket are designed by adopting trusses to ensure the rigidity. The front upper beam corresponds to the main bearing beam, the front lower beam and the rear lower beam correspond to the lower part of the cradle bottom platform, and the front upper beam and the front lower beam are connected through a front hanging strip.
The ultra-wide bridge hanging basket structure is characterized in that the hanging basket structure comprises a hanging basket body and a hanging basket body; the front, middle and rear parts of the main bearing beam of the cradle are respectively provided with transverse connection to ensure the integral rigidity during walking, and the walking deviation is strictly controlled by walking during walking.
The ultra-wide bridge hanging basket structure is characterized in that the hanging basket structure comprises a hanging basket body and a hanging basket body; the hanging basket transverse middle upright posts are connected by steel trusses, and the front upper cross beam, the front lower cross beam and the rear lower cross beam are all designed by steel trusses; and the ultra-wide transverse rigidity is ensured by adopting the transverse truss design.
The ultra-wide bridge hanging basket structure is characterized in that the hanging basket structure comprises a hanging basket body and a hanging basket body; four groups of flange lower slide rails are designed on the main bearing beam, and the two groups of lower slide rails ensure the safe and synchronous walking of the overweight hanging basket.
An implementation method of an ultra-wide bridge hanging basket structure is characterized in that; the method is implemented according to the following steps;
step one, determining the number of main bearing beam groups (main bearing trusses);
(1) determining the number of the main bearing beam groups of the maximum section weight according to the design of the bridge;
(2) the main bearing beam is reasonably arranged according to the cross section structure of the main beam design structure;
(3) when the integral rigidity of the hanging basket does not meet the standard requirement and the deviation is not large, the adopted triangular hanging basket is designed, the vertical column of the hanging basket is pre-jacked, prestress is applied to the inclined pull belt, the gap is eliminated, and the disturbance degree of the hanging basket is reduced;
step two, basket system fence design and lower sliding beam design;
designing a bottom rail with enough strength and rigidity according to a structural design section of the main beam, designing a side mold according to the design section, and designing an outer-side steel truss according to the requirements of designing the angle of the inclined web and the flange;
step three, designing a hanging system;
designing a suspender and a suspender according to the maximum segment weight and the hanging basket dead weight as main basis, and reasonably arranging the suspender and the suspender according to load distribution, wherein reasonable sections are needed for folding, unfolding and walking by fully considering the height change of the main beam segments during designing the suspender and the suspender;
step four, designing the transverse rigidity of the ultra-wide hanging basket;
in order to meet the construction requirement of the ultra-wide main beam, the transverse middle upright columns of the hanging basket are connected by steel trusses, and the front upper cross beam, the front lower cross beam and the rear lower cross beam are all designed by steel trusses;
designing an ultra-wide hanging basket traveling system;
the biggest difficulty of the ultra-wide hanging basket is that the span of the rear lower cross beam is overlarge under the action of the overlarge self weight in the walking process, and the requirements on strength, rigidity, stability and safety are high, while the rear lower cross beam is locked on a poured concrete segment during concrete pouring, and the stress requirement of the lower cross beam is not high after the working condition during pouring; in the traveling process of the cradle, the self weight of the cradle is generally 0.3-0.5 times of the maximum segment weight (the maximum segment weight is about 650 tons) according to the conventional cradle, and the span of the lower cross beam is preliminarily calculated to be in the range of about 26-42 meters; in order to meet the requirements, a lower sliding beam is designed under the bottom rail, the span of a rear lower cross beam is reduced, and further various requirements are met;
the ultra-wide hanging basket walking synchronism is of great importance to the structure and construction safety, the front end of a main bearing beam of the hanging basket is designed with riding wheels, the rear end of the main bearing beam of the hanging basket is designed with pressing wheels, friction is further reduced, walking type walking is adopted in walking design, inspection and adjustment are carried out every walking stroke, and asynchronous differences are controlled within an allowable range;
meanwhile, four groups of flange lower slide rails are designed for the whole cradle, and the overweight cradle is ensured to walk safely and synchronously with the two groups of bottom slide rails.
The invention has the following advantages: the invention discloses a hanging basket design for construction of an ultra-wide and ultra-heavy bridge, which is characterized in that: the design solves the construction of the bridge hanging basket under any width. By the implementation of the invention: (1) the conventional ultra-wide bridge is changed into one-time pouring from multiple pouring, so that the quality and safety of the bridge are guaranteed. (2) The safety coefficient of high-risk operation of the traveling of the hanging basket is further greatly improved.
Drawings
FIG. 1 is a cross section design diagram of an ultra-wide hanging basket;
FIG. 2 is a general design diagram of the side surface of an ultra-wide hanging basket;
FIG. 3 is a plan design layout of an ultra-wide cradle;
4-5 design diagrams of main bearing longitudinal beams of the triangular cradle;
6-8 design diagrams of the cradle lower sliding beam trolley;
FIG. 9 is a sectional view A-A of FIG. 7;
FIG. 10 is a cross-sectional view B-B of FIG. 6;
fig. 11 is a cross-sectional view C-C of fig. 6.
Wherein: the device comprises a main bearing beam 1, a stand column 2, a cradle bottom platform 3, a bearing lower slide rail 4, a front riding wheel 5, a rear pressing wheel 6, a prestress applying part 7, a diagonal belt 8, a front upper cross beam 9, a front lower cross beam 10, a rear lower cross beam 11, a front hanging belt 12, a flange lower slide rail 13 and a lower slide rail trolley 14.
Detailed Description
The present invention will be described in detail with reference to fig. 1 to 11, and the technical solutions in the embodiments of the present invention will be clearly and completely described below, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all 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.
The invention provides an ultra-wide bridge hanging basket structure through improvement, as shown in figures 1-11, which can be implemented as follows; the hanging basket structure is realized by adopting a plurality of groups of main bearing beams 1 and upright posts 2 so as to ensure the bearing requirement of the ultra-wide beam; the hanging basket structure is also provided with a hanging basket bottom platform 3; the main bearing beam 1 and the upright post 2 are connected through an inclined pull belt 8, a bearing lower sliding rail 4 is arranged below the bottom platform 3 of the hanging basket, the transverse span of the bottom rail is reduced, and the gravity of an overweight structure is shared during walking.
When the invention is implemented; during walking, a front riding wheel 5 and a rear pressing wheel 6 are designed at the front and the rear of the main bearing beam 1 to ensure synchronous and safe walking of the ultra-wide cradle; the sliding friction of the roller is used for reducing resistance to ensure synchronism.
When the invention is implemented; in order to meet the requirement of standard deflection during construction of the ultra-wide overweight segmental beam, a prestress applying part 7 is designed on the upper bearing structure of the hanging basket.
When the invention is implemented; the hanging basket structure is also provided with a front upper cross beam 9, a front lower cross beam 10 and a rear lower cross beam 11; the ultra-wide hanging basket has high requirement on transverse rigidity, and the upper and lower beams of the hanging basket are designed by adopting trusses to ensure the rigidity. The front upper crossbeam 9 corresponds to the main bearing beam 1, the front lower crossbeam 10 and the rear lower crossbeam 11 correspond to the lower part of the cradle bottom platform 3, and the front upper crossbeam 9 is connected with the front lower crossbeam 10 through a front sling 12.
When the invention is implemented; the front, middle and rear parts of the main bearing beam of the cradle are respectively provided with transverse connection to ensure the integral rigidity during walking, and the walking deviation is strictly controlled by walking during walking.
When the invention is implemented; the hanging basket transverse middle upright posts 2 are connected by steel trusses, and the front upper cross beam 9, the front lower cross beam 10 and the rear lower cross beam 11 are all designed by steel trusses; and the ultra-wide transverse rigidity is ensured by adopting the transverse truss design.
When the invention is implemented; four groups of flange lower slide rails 13 are designed on the main bearing beam 1, and the two groups of lower slide rails 4 ensure the safe and synchronous walking of the overweight hanging basket.
An implementation method of an ultra-wide bridge hanging basket structure; the method is implemented according to the following steps;
step one, determining the number of main bearing beam groups (main bearing trusses);
(1) determining the number of the main bearing beam groups of the maximum section weight according to the design of the bridge;
(2) the main bearing beam is reasonably arranged according to the cross section structure of the main beam design structure;
(3) when the integral rigidity of the hanging basket does not meet the standard requirement and the deviation is not large, the adopted triangular hanging basket is designed, the vertical column of the hanging basket is pre-jacked, prestress is applied to the inclined pull belt, the gap is eliminated, and the disturbance degree of the hanging basket is reduced;
step two, basket system fence design and lower sliding beam design;
designing a bottom rail with enough strength and rigidity according to a structural design section of the main beam, designing a side mold according to the design section, and designing an outer-side steel truss according to the requirements of designing the angle of the inclined web and the flange;
step three, designing a hanging system;
designing a suspender and a suspender according to the maximum segment weight and the hanging basket dead weight as main basis, and reasonably arranging the suspender and the suspender according to load distribution, wherein reasonable sections are needed for folding, unfolding and walking by fully considering the height change of the main beam segments during designing the suspender and the suspender;
step four, designing the transverse rigidity of the ultra-wide hanging basket;
in order to meet the construction requirement of the ultra-wide main beam, the transverse middle upright columns of the hanging basket are connected by steel trusses, and the front upper cross beam, the front lower cross beam and the rear lower cross beam are all designed by steel trusses;
designing an ultra-wide hanging basket traveling system;
the biggest difficulty of the ultra-wide hanging basket is that the span of the rear lower cross beam is overlarge under the action of the overlarge self weight in the walking process, and the requirements on strength, rigidity, stability and safety are high, while the rear lower cross beam is locked on a poured concrete segment during concrete pouring, and the stress requirement of the lower cross beam is not high after the working condition during pouring; in the traveling process of the cradle, the self weight of the cradle is generally 0.3-0.5 times of the maximum segment weight (the maximum segment weight is about 650 tons) according to the conventional cradle, and the span of the lower cross beam is preliminarily calculated to be in the range of about 26-42 meters; in order to meet the requirements, a lower sliding beam is designed under the bottom rail, the span of a rear lower cross beam is reduced, and further various requirements are met;
the ultra-wide hanging basket walking synchronism is of great importance to the structure and construction safety, the front end of a main bearing beam of the hanging basket is designed with riding wheels, the rear end of the main bearing beam of the hanging basket is designed with pressing wheels, friction is further reduced, walking type walking is adopted in walking design, inspection and adjustment are carried out every walking stroke, and asynchronous differences are controlled within an allowable range;
meanwhile, four groups of flange lower slide rails are designed for the whole cradle, and the overweight cradle is ensured to walk safely and synchronously with the two groups of bottom slide rails.
The invention provides a structural design of an ultra-wide hanging basket, which has the following improvements:
the ultra-wide hanging basket has the advantages that 1, the ultra-wide hanging basket is generally overweight in structure, the transverse span is large, the rigidity requirement of the bottom rail is high when the hanging basket walks, and the bearing sliding beam is arranged below the bottom rail of the hanging basket in the design, so that the transverse span of the bottom rail is reduced, and the ultra-wide hanging basket walks and is safe.
The ultra-wide hanging basket needs to bear a large weight, and when the hanging basket is designed, a plurality of groups of bearing structures are designed on the upper portion of the hanging basket for bearing requirements, so that the strength and the rigidity are guaranteed.
And 3, the requirement on the transverse rigidity of the ultra-wide hanging basket is high, and the upper and lower beams of the hanging basket are designed by adopting trusses to ensure the rigidity of the hanging basket.
4, the synchronism is very important when the multi-group main bearing beam of the ultra-wide cradle walks, construction safety is seriously influenced, in order to ensure the walking synchronism and safety, front riding wheels and rear pressing wheels are respectively designed at the upper end, the lower end, the front end and the rear end of the main bearing beam, the synchronism is ensured by reducing resistance through roller sliding friction, transverse connection is respectively arranged in the front, the middle and the rear of the main bearing beam of the cradle to ensure the integral rigidity during walking, and walking deviation is strictly controlled for walking during walking.
And 5, applying prestress on the design of a bearing structure on the upper part of the hanging basket in order to meet the requirement of the specification on the deflection of the hanging basket during the construction of the ultra-wide overweight segmental beam.
The design of the invention solves the construction problem of any ultra-wide suspension casting section beam. The invention is realized by the following steps: 1. in the aspect of hanging basket bearing, a plurality of groups of main bearing beams (or main bearing trusses) are adopted to ensure the bearing requirement of the ultra-wide beam; 2. when the ultra-wide hanging basket is difficult to walk to the maximum extent, a bearing slide rail beam is designed under the bottom rail of the hanging basket to reduce the transverse span of the bottom rail and share the gravity of an ultra-heavy structure during walking; 3. the ultra-wide transverse rigidity is ensured by adopting the transverse truss design; 4. during walking, front supporting wheels and rear pressing wheels are designed at the front and the rear of the main bearing beam to ensure synchronous and safe walking of the ultra-wide cradle; 5. when the ultra-wide overweight segmental beam is constructed, in order to meet the requirement of standard deflection, prestress is applied to the design of the bearing structure on the upper part of the hanging basket.
An implementation example; in the construction of a three-bridge (central cable plane short tower cable-stayed concrete cantilever beam, main beam width is 41 meters) in Jiangjia river at southern county of south China of Sichuan highway bridge construction group Limited company, when a hanging basket is designed, a plurality of groups of main bearing beams are adopted to guarantee bearing requirements, a bearing sliding beam is arranged on a bottom fence to guarantee normal walking of an ultra-wide hanging basket, a transverse truss design is adopted to guarantee ultra-wide transverse rigidity, and a front riding wheel and a rear pressing wheel are designed in the front of and behind the main bearing beams to guarantee synchronous safety of walking of the ultra-wide hanging basket during walking.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (8)
1. An ultra-wide bridge hanging basket structure is characterized in that; the hanging basket structure is realized by adopting a plurality of groups of main bearing beams (1) and upright posts (2) so as to ensure the bearing requirement of an ultra-wide beam; the hanging basket structure is also provided with a hanging basket bottom platform (3); the main bearing beam (1) is connected with the upright post (2) through a diagonal cable (8), a bearing lower sliding rail (4) is designed under the hanging basket bottom platform (3), the transverse span of the bottom rail is reduced, and the gravity of an overweight structure is shared during walking.
2. The ultra-wide bridge hanging basket structure as recited in claim 1, wherein; during walking, a front riding wheel (5) and a rear pressing wheel (6) are designed in front of and behind the main bearing beam (1) to ensure synchronous and safe walking of the ultra-wide cradle; the sliding friction of the roller is used for reducing resistance to ensure synchronism.
3. The ultra-wide bridge hanging basket structure as recited in claim 1, wherein; in order to meet the requirement of standard deflection during construction of the ultra-wide overweight segmental beam, a prestress applying part (7) is designed on the upper bearing structure of the hanging basket.
4. The ultra-wide bridge hanging basket structure as recited in claim 1, wherein; the hanging basket structure is also provided with a front upper cross beam (9), a front lower cross beam (10) and a rear lower cross beam (11); the ultra-wide hanging basket has high requirement on transverse rigidity, and the upper and lower beams of the hanging basket are designed by adopting trusses to ensure the rigidity; the front upper beam (9) corresponds to the upper part of the main bearing beam (1), the front lower beam (10) and the rear lower beam (11) correspond to the lower part of the hanging basket bottom platform (3), and the front upper beam (9) is connected with the front lower beam (10) through a front hanging strip (12).
5. The ultra-wide bridge hanging basket structure as recited in claim 1, wherein; the front, middle and rear parts of the main bearing beam of the cradle are respectively provided with transverse connection to ensure the integral rigidity during walking, and the walking deviation is strictly controlled by walking during walking.
6. The ultra-wide bridge hanging basket structure as recited in claim 1, wherein; the hanging basket transverse middle upright posts (2) are connected by steel trusses, and the front upper cross beam (9), the front lower cross beam (10) and the rear lower cross beam (11) are all designed by steel trusses; and the ultra-wide transverse rigidity is ensured by adopting the transverse truss design.
7. The ultra-wide bridge hanging basket structure as recited in claim 1, wherein; four groups of flange lower sliding rails (13) are designed on the main bearing beam (1) and ensure safe and synchronous walking of the overweight hanging basket with the two groups of lower sliding rails (4).
8. An implementation method of an ultra-wide bridge hanging basket structure is characterized in that; the method is implemented according to the following steps;
step one, determining the number of main bearing beam groups (main bearing trusses);
(1) determining the number of the main bearing beam groups of the maximum section weight according to the design of the bridge;
(2) the main bearing beam is reasonably arranged according to the cross section structure of the main beam design structure;
(3) when the integral rigidity of the hanging basket does not meet the standard requirement and the deviation is not large, the adopted triangular hanging basket is designed, the vertical column of the hanging basket is pre-jacked, prestress is applied to the inclined pull belt, the gap is eliminated, and the disturbance degree of the hanging basket is reduced;
step two, basket system fence design and lower sliding beam design;
designing a bottom rail with enough strength and rigidity according to a structural design section of the main beam, designing a side mold according to the design section, and designing an outer-side steel truss according to the requirements of designing the angle of the inclined web and the flange;
step three, designing a hanging system;
designing a suspender and a suspender according to the maximum segment weight and the hanging basket dead weight as main basis, and reasonably arranging the suspender and the suspender according to load distribution, wherein reasonable sections are needed for folding, unfolding and walking by fully considering the height change of the main beam segments during designing the suspender and the suspender;
step four, designing the transverse rigidity of the ultra-wide hanging basket;
in order to meet the construction requirement of the ultra-wide main beam, the transverse middle upright columns of the hanging basket are connected by steel trusses, and the front upper cross beam, the front lower cross beam and the rear lower cross beam are all designed by steel trusses;
designing an ultra-wide hanging basket traveling system;
the biggest difficulty of the ultra-wide hanging basket is that the span of the rear lower cross beam is overlarge under the action of the overlarge self weight in the walking process, and the requirements on strength, rigidity, stability and safety are high, while the rear lower cross beam is locked on a poured concrete segment during concrete pouring, and the stress requirement of the lower cross beam is not high after the working condition during pouring; in the traveling process of the cradle, the self weight of the cradle is generally 0.3-0.5 times of the maximum segment weight (the maximum segment weight is about 650 tons) according to the conventional cradle, and the span of the lower cross beam is preliminarily calculated to be in the range of about 26-42 meters; in order to meet the requirements, a lower sliding beam is designed under the bottom rail, the span of a rear lower cross beam is reduced, and further various requirements are met;
the ultra-wide hanging basket walking synchronism is of great importance to the structure and construction safety, the front end of a main bearing beam of the hanging basket is designed with riding wheels, the rear end of the main bearing beam of the hanging basket is designed with pressing wheels, friction is further reduced, walking type walking is adopted in walking design, inspection and adjustment are carried out every walking stroke, and asynchronous differences are controlled within an allowable range;
meanwhile, four groups of flange lower slide rails are designed for the whole cradle, and the overweight cradle is ensured to walk safely and synchronously with the two groups of bottom slide rails.
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| CN115824315A (en) * | 2023-02-14 | 2023-03-21 | 四川公路桥梁建设集团有限公司 | Real-time detection and early warning system and method for synchronous vertical rotation state of steel arch tower |
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| CN115824315A (en) * | 2023-02-14 | 2023-03-21 | 四川公路桥梁建设集团有限公司 | Real-time detection and early warning system and method for synchronous vertical rotation state of steel arch tower |
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