CN114214968B - Bridge No. 0 block bottom plate dismantling-free construction method - Google Patents
Bridge No. 0 block bottom plate dismantling-free construction method Download PDFInfo
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- CN114214968B CN114214968B CN202111532354.7A CN202111532354A CN114214968B CN 114214968 B CN114214968 B CN 114214968B CN 202111532354 A CN202111532354 A CN 202111532354A CN 114214968 B CN114214968 B CN 114214968B
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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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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D2/00—Bridges characterised by the cross-section of their bearing spanning structure
- E01D2/04—Bridges characterised by the cross-section of their bearing spanning structure of the box-girder type
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Abstract
The invention provides a dismantling-free construction method for a No. 0 block bottom plate of a bridge, which relates to the technical field of bridge construction and comprises the following steps: connect No. 0 piece bottom plates and hang basket: the position, close to the front end, of the two sides of the bottom plate is connected with a front end cross beam of the hanging basket by adopting the hanging belt, and the position, close to the middle, of the two sides of the bottom plate is connected with a middle cross beam of the hanging basket; chain block of connection restriction number 0 swing: arranging a chain block on the pier column and connecting the chain block with the bottom plate; remove No. 0 piece bottom plate: removing the No. 0 supporting steel column, loosening the hanging strip between the hanging basket and the bottom plate, and loosening the control on the bottom plate by using the hand-pulling hoist to enable the bottom plate to move forward to a preset position; the number 0 block bottom plate is used as a hanging basket bottom basket: tightening the suspender between the hanging basket and the bottom plate until the bottom plate is positioned at the working position, and using the suspender as a hanging basket bottom basket system, the problems that in the prior art, the bottom plate of the No. 0 block needs to be removed, and the bottom basket is installed at the position of the No. 1 block to serve as a new bottom plate, so that the construction is complicated, and the time and the labor are consumed are solved.
Description
Technical Field
The invention belongs to the technical field of bridge construction, and particularly provides a dismantling-free construction method for a No. 0 block bottom plate of a bridge.
Background
The corrugated steel web prestressed concrete bridge has a series of advantages of good earthquake resistance, high structural strength, good economy and the like, and along with continuous deep expansion of theory and practical application, the corrugated steel web is more and more favored by bridge engineers in bridge construction. Unlike traditional construction methods, corrugated steel web box girder bridges are generally constructed by adopting a basket hanging method.
The basket hanging method construction technology adopted by the corrugated steel web box girder bridge is generally multi-purpose diamond basket hanging or triangular basket hanging, the traditional basket hanging is required to be removed after the number 0 bottom plate is used in the construction process, the basket hanging is required to be installed at the number 1 bottom plate support of the basket hanging bottom plate system as the bridge construction at the number 1 position after the basket hanging is required to be removed, and a great amount of time is required to be consumed for installing the basket hanging bottom plate system and removing the number 0 bottom plate. And when the basket system is installed at the bottom of the basket, a large amount of manpower and material resources are required to be consumed for installing the bottom plate of the basket, and the dangerously caused by the fact that workers are in a suspended operation platform is high.
Accordingly, there is a need in the art for a bridge No. 0 floor dismantling-free construction method to solve the above-mentioned problems.
Disclosure of Invention
The invention provides a bridge No. 0 block bottom plate dismantling-free construction method, which solves the problems of complicated construction, time consumption and labor consumption caused by dismantling the No. 0 block bottom plate and installing a bottom basket at the position of the No. 1 block as a new bottom plate in the prior art.
The technical scheme of the invention is realized as follows: a bridge No. 0 block bottom plate dismantling-free construction method comprises the following steps: connect No. 0 piece bottom plates and hang basket: defining the construction direction from the No. 0 block to the No. 1 block as the front, after the construction of the No. 0 block is completed and a hanging basket upper structure is erected, connecting the positions, close to the front ends, of the two sides of the bottom plate with the front end cross beams of the hanging basket by using hanging straps, connecting the positions, close to the middle, of the two sides of the bottom plate with the middle cross beams of the hanging basket by using hanging straps, wherein the front end cross beams are positioned at the front end of the No. 1 block, and the middle cross beams are positioned at the edges, close to the No. 1 block, of the No. 0 block; chain block of connection restriction number 0 swing: setting a preset number of chain blocks on the pier column, and connecting the chain blocks on the pier column with the position, close to the rear end, of the bottom plate; remove No. 0 piece bottom plate: removing a No. 0 supporting steel column, loosening the preset length of a sling between the hanging basket and the bottom plate, and loosening the control on the bottom plate by using the chain block to enable the bottom plate to move forward to a preset position; the number 0 block bottom plate is used as a hanging basket bottom basket: tightening the hanging strip between the hanging basket and the bottom plate until the bottom plate is positioned at the working position, and using the hanging strip as a hanging basket bottom basket system.
The technical effect of this scheme is: the template supporting system at the bottom of the No. 0 block, namely the bottom plate, is used as the bottom basket system of the hanging basket, so that the time for dismantling the No. 0 block bottom plate and the time for erecting and installing the bottom basket of the hanging basket are saved, the construction efficiency is improved, and the labor consumption is reduced.
In the above preferred technical scheme of the bridge No. 0 block bottom plate dismantling-free construction method, the step of connecting the chain block limiting the swing of the No. 0 block further comprises the following steps: the method comprises the steps of setting a preset number of chain blocks on a front end cross beam of the hanging basket, and connecting the chain blocks on the front end cross beam with the position, close to the front end, of the bottom plate.
The technical effect of this scheme is: in order to prevent the bottom plate from being damaged or falling off due to overlarge dead weight and overlarge impulse, the hand chain blocks on the hanging basket and the hand chain blocks on the pier stud form control on the swing of the bottom plate at the front end and the rear end of the bottom plate respectively, so that the impulse can be effectively reduced.
In the preferred technical scheme of the dismantling-free construction method for the No. 0 bottom plate of the bridge, the bottom plate comprises front double-spliced I-steel, rear double-spliced I-steel, longitudinal I-steel and steel plates, the front double-spliced I-steel and the rear double-spliced I-steel are arranged in parallel in the transverse direction, the longitudinal I-steel is located above the front double-spliced I-steel and the rear double-spliced I-steel and is vertically connected with the front double-spliced I-steel and the rear double-spliced I-steel, and the steel plates are located above the longitudinal I-steel and are connected with the longitudinal I-steel.
In the preferable technical scheme of the dismantling-free construction method for the No. 0 bottom plate of the bridge, the connection points between the longitudinal I-steel and the front double-spliced I-steel and the rear double-spliced I-steel and between the steel plate and the longitudinal I-steel are consistent, and are connected through finish rolling deformed steel bars and bolts.
The technical effect of this scheme is: the integral strength and the stability of the bottom plate are guaranteed, the bottom plate is prevented from deviating inside due to the torque in the swinging process, and the load born by the bottom plate is reduced.
In the above preferred technical scheme of the bridge No. 0 block bottom plate dismantling-free construction method, the step of connecting and limiting the hand chain block swinging of the No. 0 block is as follows: the chain block positioned on the pier stud is connected with the rear double-spliced I-steel, and the chain block positioned on the front end cross beam is connected with the front double-spliced I-steel.
The technical effect of this scheme is: the swinging position of the bottom plate is conveniently controlled by the hand hoist.
Drawings
In order to more clearly illustrate the embodiments of the invention or the technical solutions of the prior art, the drawings which are used in the description of the embodiments or the prior art will be briefly described, it being obvious that the drawings in the description below are only some embodiments of the invention, and that other drawings can be obtained according to these drawings without inventive faculty for a person skilled in the art.
FIG. 1 is a step diagram of a bridge No. 0 block bottom plate dismantling-free construction method of the invention;
fig. 2 is a schematic diagram of connection between a bottom plate of a bridge No. 0 block and a hanging basket.
List of reference numerals: 1. front double-spliced I-steel; 2. double-spliced I-steel; 3. hanging basket; 31. a front end cross beam; 32. a middle cross beam; 4. longitudinal I-steel; 5. a steel plate; 6. a steel sling; 7. pier column; 8. chain block.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
It should be noted that, in the description of the present invention, terms such as "middle," "upper," "lower," "front," "rear," "lateral," "longitudinal," and the like indicate directions or positional relationships, and are merely for convenience of description, but do not indicate or imply that the apparatus or element must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the invention.
Furthermore, it should be noted that, in the description of the present invention, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be directly connected or indirectly connected through an intermediate medium. The specific meaning of the above terms in the present invention can be understood by those skilled in the art according to the specific circumstances.
The invention relates to a concrete embodiment of a bridge No. 0 block bottom plate dismantling-free construction method, which takes the construction of a corrugated steel web bridge as an example, as shown in fig. 2: the method comprises the steps that a support is erected before construction of a No. 0 block, two rows of transverse double-spliced I-steel are arranged after the support steel column is erected, namely, a front double-spliced I-steel 1 and a rear double-spliced I-steel 2 are arranged, after the front double-spliced I-steel 1 and the rear double-spliced I-steel 2 are erected by using a tower crane, the double-spliced I-steel is adjusted according to a preset paying-off position until the double-spliced I-steel coincides with the paying-off position, and the model of the front double-spliced I-steel 1 and the rear double-spliced I-steel 2 is calculated by the specific weights of the No. 0 block and a hanging basket 3 and the distance between the front double-spliced I-steel 1 and the rear double-spliced I-steel 2;
the longitudinal I-steel 4 is erected above the front double-spliced I-steel 1 and the rear double-spliced I-steel 2 by using a tower crane, and the distance and the model of the longitudinal I-steel 4 are calculated by the specific weight of the No. 0 block and the hanging basket 3. When the crane is erected, the crane is required to be erected manually according to the preset paying-off position of the longitudinal I-steel 4 and the preset connecting hole of the longitudinal I-steel 4, and the preset finish rolling threaded steel anchor holes at the two ends of the longitudinal I-steel 4 are required to be aligned with the preset holes of the two rows of double-spliced transverse I-steels, so that the crane can put down the longitudinal I-steel 4;
after the longitudinal I-steel 4 is erected, a tower crane is used for hanging the steel plate 5 prepared in advance above the erected longitudinal I-steel 4, and after anchor holes preset on the steel plate 5 are manually in one-to-one correspondence with the anchor holes of the longitudinal I-steel 4, the tower crane can be used for laying down the steel plate 5;
the method comprises the steps of connecting a longitudinal I-steel 4, a front double-spliced I-steel 1, a rear double-spliced I-steel 2 and a steel plate 5 by using finish-rolled deformed steel, enabling the connection points between the longitudinal I-steel 4 and the front double-spliced I-steel 1, between the rear double-spliced I-steel 2 and between the steel plate 5 and the longitudinal I-steel 4 to be consistent, and anchoring by using high-strength bolts to form a No. 0 bottom plate, reserving anchor holes to be connected with the upper structure of a hanging basket 3 on the No. 0 bottom plate, wherein the reserved point positions and the number are determined by the size and the pre-installation position of the hanging basket 3 designed in advance;
binding bottom plate steel bars, and arranging a bottom template and a side template; then hoisting the corrugated steel web by using a tower crane and connecting the corrugated steel web; binding a top plate steel bar and arranging a top template;
casting a bottom plate, then casting a top plate, and casting symmetrically and continuously relative to the pier top;
and after the concrete strength is qualified, pre-stressing and grouting are carried out, after tension and pressure drop are finished, hanging basket 3 is hoisted and erected, and hanging basket 3 adopts a triangular hanging basket, so that No. 0 block construction is finished, and the upper structure of hanging basket 3 is installed.
And then carrying out the construction steps of No. 0 block of bottom plates without dismantling, as shown in fig. 2:
connect No. 0 piece bottom plates and hang basket: defining the construction direction from the No. 0 block to the No. 1 block as the front, connecting the positions, close to the front ends, of the two sides of the bottom plate with the front end cross beams 31 of the hanging basket 3 by adopting the steel hanging strips 6, connecting the positions, close to the middle, of the two sides of the bottom plate with the middle cross beams 32 of the hanging basket 3 by adopting the steel hanging strips 6, wherein the front end cross beams 31 of the hanging basket 3 are positioned at the front end of the No. 1 block, the middle cross beams 32 are positioned at the edges, close to the No. 1 block, of the No. 0 block, and the steel hanging strips 6 penetrate through the outer parts of bridge flange plates;
chain block of connection restriction number 0 swing: the method comprises the steps that a preset number of chain blocks 8 are arranged at the positions of pier columns 7 (the preset number of the chain blocks is determined by the weight of a number 0 bottom plate), and the chain blocks 8 positioned on the pier columns 7 are connected with rear double-spliced I-steel 2 on the bottom plate; a preset number of chain blocks 8 are arranged at the position of a front end beam 31 of the hanging basket 3, and the chain blocks 8 positioned on the front end beam 31 are connected with a front double-spliced I-steel 1 on a bottom plate;
remove No. 0 piece bottom plate: removing the No. 0 block supporting steel column, loosening the 610-20cm steel hanging strip between the hanging basket 3 and the bottom plate, wherein the horizontal displacement is arranged between the connecting positions of the steel hanging strip 6 and the hanging basket 3 and the bottom plate, and the bottom plate has a tendency of swinging towards the front end of the No. 0 block due to the dead weight of the bottom plate after the steel hanging strip 6 is loosened, so that the bottom plate is prevented from being damaged or falling off due to the overlarge self weight and the overlarge impulse of the bottom plate, the bottom plate is controlled through the chain block 8, the control of the bottom plate is slowly loosened by the chain block 8, and the bottom plate slowly moves forward to a preset position, namely the position of the bottom of the No. 1 block;
the number 0 block bottom plate is used as a hanging basket bottom basket: the steel hanging strip 6 between the hanging basket 3 and the bottom plate is tightened until the bottom plate is at a proper height, and the hanging basket bottom basket system is used. The bottom plate is then used as a bottom basket and moved in the same way as a conventional hanging basket 3 is moved forward.
According to the bridge No. 0 block bottom plate dismantling-free construction method, the No. 0 block bottom plate structure is integrally supported out by controlling the chain block and the steel hanging strip to serve as a bottom basket system of the hanging basket, so that the time for dismantling the No. 0 block bottom plate and the time for erecting and installing the hanging basket bottom basket are saved, the construction efficiency is improved, and the labor consumption is reduced.
In the above embodiment, in the step of "connecting and limiting the hand chain block 0 to swing", the hand chain blocks are respectively arranged on the pier column and the front end cross beam of the hanging basket, in other embodiments, the hand chain blocks are only arranged at the positions of the pier column, and the hand chain blocks on the pier column form pulling to swing the bottom plate to the front end of the 0 block, and can also control the swing of the bottom plate.
In the above embodiment, the chain block located on the pier column is connected with the rear double-spliced i-steel, the chain block located on the front end beam is connected with the front double-spliced i-steel, and in other embodiments, the chain block located on the pier column is connected with the rear end of the longitudinal i-steel, and the chain block located on the front end beam is connected with the front end of the longitudinal i-steel.
The foregoing description of the preferred embodiments of the invention is not intended to be limiting, but rather is intended to cover all modifications, equivalents, alternatives, and improvements that fall within the spirit and scope of the invention.
Claims (1)
1. The dismantling-free construction method for the No. 0 bridge bottom plate is characterized by comprising the following steps of:
connect No. 0 piece bottom plates and hang basket: defining the construction direction from the No. 0 block to the No. 1 block as the front, after the construction of the No. 0 block is completed and a hanging basket upper structure is erected, connecting the positions, close to the front ends, of the two sides of the bottom plate with the front end cross beams of the hanging basket by using hanging straps, connecting the positions, close to the middle, of the two sides of the bottom plate with the middle cross beams of the hanging basket by using hanging straps, wherein the front end cross beams are positioned at the front end of the No. 1 block, and the middle cross beams are positioned at the edges, close to the No. 1 block, of the No. 0 block;
chain block of connection restriction number 0 swing: setting a preset number of chain blocks on pier columns, and connecting the chain blocks on the pier columns with the position, close to the rear end, of the bottom plate;
remove No. 0 piece bottom plate: removing a No. 0 supporting steel column, loosening the preset length of a sling between the hanging basket and the bottom plate, and loosening the control on the bottom plate by using the chain block to enable the bottom plate to move forward to a preset position;
the number 0 block bottom plate is used as a hanging basket bottom basket: tightening a sling between the hanging basket and the bottom plate until the bottom plate is positioned at a working position, and using the sling as a hanging basket bottom basket system;
the step of connecting the chain block with the limit number 0 block to swing further comprises the following steps:
setting a preset number of chain blocks at the front end cross beam of the hanging basket, and connecting the chain blocks positioned on the front end cross beam with the position, close to the front end, of the bottom plate;
the bottom plate comprises a front double-spliced I-steel, a rear double-spliced I-steel, a longitudinal I-steel and a steel plate, wherein the front double-spliced I-steel and the rear double-spliced I-steel are arranged in parallel along the transverse direction, the longitudinal I-steel is positioned above the front double-spliced I-steel and the rear double-spliced I-steel and is vertically connected with the front double-spliced I-steel and the rear double-spliced I-steel, and the steel plate is positioned above the longitudinal I-steel and is connected with the longitudinal I-steel;
the connection points between the longitudinal I-steel and the front double-spliced I-steel, between the rear double-spliced I-steel and between the steel plate and the longitudinal I-steel are consistent, and are connected with each other through finish rolling deformed steel bars and bolts;
in the step of connecting and limiting the hand chain block with the swing of the No. 0 block:
the chain block positioned on the pier stud is connected with the rear double-spliced I-steel, and the chain block positioned on the front end cross beam is connected with the front double-spliced I-steel.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202111532354.7A CN114214968B (en) | 2021-12-15 | 2021-12-15 | Bridge No. 0 block bottom plate dismantling-free construction method |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202111532354.7A CN114214968B (en) | 2021-12-15 | 2021-12-15 | Bridge No. 0 block bottom plate dismantling-free construction method |
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| CN114214968A CN114214968A (en) | 2022-03-22 |
| CN114214968B true CN114214968B (en) | 2023-05-12 |
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| JP2000110114A (en) * | 1998-10-02 | 2000-04-18 | Ps Corp | Construction method for overhang-erected girder bridge using corrugated steel plate web and equipment for overhang erection work |
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| CN214033417U (en) * | 2020-10-12 | 2021-08-24 | 中国路桥工程有限责任公司 | Bridge cantilever is pour construction and is used interior sliding beam system |
| CN214831983U (en) * | 2021-05-19 | 2021-11-23 | 山东博远重工有限公司 | Novel asynchronous basket construction structures of hanging |
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2021
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