CN114855657A - Method for quickly dismantling municipal overpass - Google Patents
Method for quickly dismantling municipal overpass Download PDFInfo
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- CN114855657A CN114855657A CN202210670620.0A CN202210670620A CN114855657A CN 114855657 A CN114855657 A CN 114855657A CN 202210670620 A CN202210670620 A CN 202210670620A CN 114855657 A CN114855657 A CN 114855657A
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- crawler
- box girder
- overpass
- chiseling
- type rock
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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
- E01D22/00—Methods or apparatus for repairing or strengthening existing bridges ; Methods or apparatus for dismantling bridges
Abstract
The invention discloses a quick dismantling method of a municipal overpass, which comprises the steps of totally enclosed management, drawing the design positions of left and right web lines of a box girder, and positioning a crawler-type rock drill for the first time; adopting a symmetrical chiseling operation mode to chive concrete at the positions of an anti-collision rail and a wing plate of the box girder of the overpass; the crawler-type rock drill is in position for the second time on the ground; and arranging four crawler-type rock drills at each span of the box girder to symmetrically chisel two ends of the box girder, and after the two ends of the box girder are damaged, the whole span of the box girder can collapse onto the ground, and the crawler-type rock drills chisel the box girder and transport materials away from the site. The method has the advantages that chiseling operation is simultaneously carried out by adopting a plurality of crawler-type rock drills, chiseled concrete slag is timely transported away from the site, the whole overpass can be dismantled in a short time, the problems of long dismantling period, complicated blasting procedure and limited use of the municipal overpass are solved, and the transportation trip of citizens is not influenced.
Description
Technical Field
The invention relates to the field of road construction, in particular to a rapid dismantling method for a municipal overpass.
Background
At present, the municipal overpass dismantling method mainly comprises two prior arts: firstly, erecting a full hall support to support the overpass, then cutting the overpass into small pieces, hoisting the overpass by using a large crane and transporting the overpass away from the site; and secondly, blasting the support part of the overpass pier body by adopting a blasting technology, wherein the overpass upper structure part collapses to the ground along with the collapse, and then, crushing the concrete by adopting a rock drill and transporting the material away from the site.
The first method is mainly characterized in that the time for setting up a full hall bracket and cutting the full hall bracket into blocks is too long, and the minimum time of three months is required for removing a 500m long overpass by adopting the method, so that the transportation trip of citizens is seriously influenced. The second method is mainly that the blasting procedure is complicated, the approval time is long, and from the safety perspective, the flyover of nearby residents is strictly forbidden to use the blasting method. Therefore, the municipal overpass dismantling method in the prior art has the problems of long dismantling period, complicated blasting procedures, limited use and the like.
Disclosure of Invention
In order to overcome the defects of the prior art, the invention aims to provide a method for quickly dismantling a municipal overpass, which can solve the problems of long dismantling period and complicated blasting procedures.
One of the purposes of the invention is realized by adopting the following technical scheme:
a quick dismantling method for a municipal overpass comprises the following steps:
the preparation method comprises the following steps: totally-enclosed management is carried out on a road section of the overpass to be dismantled, the design positions of left and right web plate lines of a box girder are drawn on the bridge surface of the overpass, and a crawler-type rock drill is put in place for the first time according to the design positions;
primary chiseling operation: chiseling concrete at the positions of an anti-collision fence and a wing plate of a box girder of the overpass by adopting a symmetrical chiseling operation mode of a crawler-type rock drill;
a return walking step: chiseling concrete at the positions of an anti-collision fence and a wing plate of a box girder, and after chiseling is finished, all the crawler-type rock drills sequentially and completely go back to the ground;
secondary positioning step: the crawler-type rock drill is in place for the second time on the ground;
secondary chiseling operation: and arranging four crawler-type rock drills at each span of the box girder to symmetrically chisel two ends of the box girder, and after the two ends of the box girder are damaged, the whole span of the box girder can collapse onto the ground, and the crawler-type rock drills chisel the box girder and transport materials away from the site.
Further, in the preparation step, whether the design positions of the left and right web lines of the box girder are correct or not is checked, and if not, the box girder is re-identified.
Further, in the preparation step, before the crawler rock drill works, whether the working position is correct or not is checked.
Further, in the primary chiseling operation step, when the crawler rock drills perform symmetrical chiseling operation, the plurality of crawler rock drills are combined into a group in pairs, and operation is performed in a mode of symmetrical operation positions in one group of crawler rock drills.
Further, in the primary chiseling operation step, in a set of crawler rock drills, the driving station is equipped with an intra-set communication voice facility.
Further, in the primary chiseling operation step, in a group of the crawler-type rock drills, before operation, drivers in the same group of the crawler-type rock drills perform position communication.
Further, in the walk-back step, the tracked rockdrill is arranged in a straight line.
Further, in the secondary seating step, the secondary seating position is located below the design positions of the left and right web lines of the box girder.
Further, the method also comprises the following material cleaning steps: and (4) clearing the residual building materials in the field thoroughly.
Further, the method also comprises the following traffic dispersion steps: and cleaning the surface of the site of the closed area, opening traffic and dredging the traffic.
Compared with the prior art, the invention has the beneficial effects that:
totally-enclosed management is carried out on a road section of the overpass to be dismantled, the design positions of left and right web plate lines of a box girder are drawn on the bridge surface of the overpass, and a crawler-type rock drill is put in place for the first time according to the design positions; chiseling concrete at the positions of an anti-collision fence and a wing plate of a box girder of the overpass by adopting a symmetrical chiseling operation mode of a crawler-type rock drill; chiseling concrete at the positions of an anti-collision fence and a wing plate of a box girder, and after chiseling is finished, all the crawler-type rock drills sequentially and completely go back to the ground; the crawler-type rock drill is in place for the second time on the ground; and arranging four crawler-type rock drills at each span of the box girder to symmetrically chisel two ends of the box girder, and after the two ends of the box girder are damaged, the whole span of the box girder can collapse onto the ground, and the crawler-type rock drills chisel the box girder and transport materials away from the site. The method has the advantages that chiseling operation is simultaneously carried out by adopting a plurality of crawler-type rock drills, chiseled concrete slag is timely transported away from the site, the whole overpass can be dismantled in a short time, the problems of long dismantling period, complicated blasting procedure and limited use of the municipal overpass are solved, and the transportation trip of citizens is not influenced.
The foregoing description is only an overview of the technical solutions of the present invention, and in order to make the technical means of the present invention more clearly understood, the present invention may be implemented in accordance with the content of the description, and in order to make the above and other objects, features, and advantages of the present invention more clearly understood, the following preferred embodiments are described in detail with reference to the accompanying drawings.
Drawings
FIG. 1 is a flow chart of a preferred embodiment of the method for quickly dismantling a municipal overpass according to the present invention;
FIG. 2 is a schematic illustration of a secondary seating position;
in the figure: 1. crawler-type rock drill, 2, bridge case roof beam, 3, bridge pier stud.
Detailed Description
The present invention is further described with reference to the accompanying drawings and the detailed description, and it should be noted that, in the case of no conflict, any combination between the embodiments or technical features described below may form a new embodiment.
It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present. When a component is referred to as being "connected" to another component, it can be directly connected to the other component or intervening components may also be present. When a component is referred to as being "disposed on" another component, it can be directly on the other component or intervening components may also be present. The terms "vertical," "horizontal," "left," "right," and the like are used herein for purposes of illustration only.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.
Referring to fig. 1-2, a method for quickly dismantling a municipal overpass includes the following steps:
the preparation method comprises the following steps: totally-enclosed management is carried out on a road section of the overpass to be dismantled, the design positions of left and right web plate lines of a box girder are drawn on the bridge surface of the overpass, and a crawler-type rock drill is put in place for the first time according to the design positions; preferably, in the preparing step, it is checked whether the design positions of the left and right web lines of the box girder are correct, and if not, the box girder is re-identified. Before the crawler-type rock drill works, whether the working position is correct or not is checked. Specifically, the design position of the crawler-type rock drill mainly considers symmetrical dismantling of the overpass, and in order to improve the efficacy and the structural safety of the crawler-type rock drill, the crawler-type rock drill is positioned on the bridge surface of the overpass and strictly controlled within the range of a left web plate line and a right web plate line.
Primary chiseling operation: chiseling concrete at the positions of an anti-collision fence and a wing plate of a box girder of the overpass by adopting a symmetrical chiseling operation mode of a crawler-type rock drill; preferably, in the primary chiseling operation step, when the tracked rock drills perform symmetrical chiseling operation, the plurality of tracked rock drills are combined into a group in pairs, and operation is performed in a mode of symmetrical operation positions in one group of tracked rock drills. In the primary chiseling operation step, in a group of crawler rock drills, a driving position is provided with an inter-group communication voice facility. In a group of crawler rock drills, drivers in the same group of crawler rock drills perform position communication before operation. It is to be noted that the primary seating is on the deck and the secondary seating is under the deck.
Preferably, in the walk-back step, the tracked rockdrill is aligned in a straight line.
A return walking step: chiseling concrete at the positions of an anti-collision fence and a wing plate of a box girder, and after chiseling is finished, all the crawler-type rock drills sequentially and completely go back to the ground;
secondary positioning step: the crawler-type rock drill is in place for the second time on the ground; referring specifically to fig. 2, a schematic diagram of the second seating, in which the tracked rockdrill 1 is located below the bridge box beam 2 and on both sides of the bridge pier 3. Specifically, the secondary design position of the crawler rock drill mainly considers symmetrical dismantling of the overpass, and the secondary positioning is to chisel the part of the box chamber, mainly bearing load, of the box girder, so that the crawler rock drill needs to return to the ground to work.
Secondary chiseling operation: and arranging four crawler-type rock drills at each span of the box girder to symmetrically chisel two ends of the box girder, and after the two ends of the box girder are damaged, the whole span of the box girder can collapse onto the ground, and the crawler-type rock drills chisel the box girder and transport materials away from the site. The method has the advantages that chiseling operation is simultaneously carried out by adopting a plurality of crawler-type rock drills, chiseled concrete slag is timely transported away from the site, the whole overpass can be dismantled in a short time, the problems of long dismantling period, complicated blasting procedure and limited use of the municipal overpass are solved, and the transportation trip of citizens is not influenced.
Preferably, in the secondary seating step, the secondary seating position is located below the design position of the left and right web lines of the box girder.
Material cleaning: and (4) clearing the residual building materials in the field thoroughly.
Traffic dispersion: and cleaning the surface of the site of the closed area, opening traffic and dredging the traffic. The invention realizes the quick dismantling of the municipal overpass, reduces the urban traffic jam to the maximum extent and facilitates the transportation trip of citizens.
The above embodiments are only preferred embodiments of the present invention, and the protection scope of the present invention is not limited thereby, and any insubstantial changes and substitutions made by those skilled in the art based on the present invention are within the protection scope of the present invention.
Claims (10)
1. A quick dismantling method for a municipal overpass is characterized by comprising the following steps:
the preparation method comprises the following steps: totally-enclosed management is carried out on a road section of the overpass to be dismantled, the design positions of left and right web plate lines of a box girder are drawn on the bridge surface of the overpass, and a crawler-type rock drill is put in place for the first time according to the design positions;
primary chiseling operation: chiseling concrete at the positions of an anti-collision fence and a wing plate of a box girder of the overpass by adopting a symmetrical chiseling operation mode of a crawler-type rock drill;
a return walking step: chiseling concrete at the positions of an anti-collision fence and a wing plate of a box girder, and after chiseling is finished, all the crawler-type rock drills sequentially and completely go back to the ground;
secondary positioning step: the crawler-type rock drill is in place for the second time on the ground;
secondary chiseling operation: and arranging four crawler-type rock drills at each span of the box girder to symmetrically chisel two ends of the box girder, and after the two ends of the box girder are damaged, the whole span of the box girder can collapse onto the ground, and the crawler-type rock drills chisel the box girder and transport materials away from the site.
2. The method for quickly dismantling the municipal overpass according to claim 1, wherein: in the preparation step, whether the design positions of the left and right web lines of the box girder are correct or not is checked, and if not, the design positions are re-identified.
3. The method for quickly dismantling the municipal overpass according to claim 1, wherein: in the preparation step, before the crawler rock drill works, whether the working position is correct or not is checked.
4. The method for quickly dismantling the municipal overpass according to claim 1, wherein: in the primary chiseling operation step, when the crawler rock drills are symmetrically chiseling-out operated, the plurality of crawler rock drills are combined into a group in pairs, and the operation is carried out in a mode of symmetrical operation positions in one group of crawler rock drills.
5. The method for quickly dismantling the municipal overpass according to claim 1, wherein: in the primary chiseling operation step, a driving position is provided with an inter-group communication voice facility in a group of crawler rock drills.
6. The method for quickly dismantling the municipal overpass according to claim 5, wherein: in the primary chiseling operation step, drivers in a group of crawler rock drills communicate with each other in position before operation.
7. The method for quickly dismantling the municipal overpass according to claim 1, wherein: in the walk-back step, the tracked rockdrill is arranged in a straight line.
8. The method for quickly dismantling the municipal overpass according to claim 1, wherein: in the secondary seating step, the secondary seating position is located below the design positions of the left and right web lines of the box girder.
9. The method for quickly dismantling the municipal overpass according to claim 1, further comprising the step of material cleaning: and (4) clearing the residual building materials in the field thoroughly.
10. The method for quickly dismantling the municipal overpass according to claim 1, further comprising the step of traffic diversion: and cleaning the surface of the site of the closed area, opening traffic and dredging the traffic.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN202210670620.0A CN114855657A (en) | 2022-06-14 | 2022-06-14 | Method for quickly dismantling municipal overpass |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202210670620.0A CN114855657A (en) | 2022-06-14 | 2022-06-14 | Method for quickly dismantling municipal overpass |
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| CN114855657A true CN114855657A (en) | 2022-08-05 |
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| CN202210670620.0A Pending CN114855657A (en) | 2022-06-14 | 2022-06-14 | Method for quickly dismantling municipal overpass |
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| JP2017089302A (en) * | 2015-11-13 | 2017-05-25 | 首都高速道路株式会社 | Floor slab removal method for composite girder |
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| CN112252212A (en) * | 2020-10-27 | 2021-01-22 | 中交路桥华南工程有限公司 | Method for dismantling prestressed concrete variable cross-section continuous beam bridge |
| CN112575697A (en) * | 2020-12-16 | 2021-03-30 | 浙大城市学院 | Rapid dismantling system and construction method for multi-layer overpass concrete continuous box girder ramp bridge |
| CN113774807A (en) * | 2021-09-29 | 2021-12-10 | 安徽省公路桥梁工程有限公司 | Upper-span bridge swivel construction method applied to narrow and limited operation space |
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2022
- 2022-06-14 CN CN202210670620.0A patent/CN114855657A/en active Pending
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2017089302A (en) * | 2015-11-13 | 2017-05-25 | 首都高速道路株式会社 | Floor slab removal method for composite girder |
| CN108708305A (en) * | 2018-05-28 | 2018-10-26 | 广西路桥工程集团有限公司 | A kind of construction method of low pier bridging toughening |
| CN109208493A (en) * | 2018-09-07 | 2019-01-15 | 南昌大学 | A kind of cross-line single-box multi-cell cast-in-situ steel reinforced concrete bridge superstructure Demolition Construction method |
| CN110565549A (en) * | 2019-09-26 | 2019-12-13 | 常州市市政建设工程有限公司 | New bridge dismantling process for urban viaduct |
| CN111155451A (en) * | 2020-01-16 | 2020-05-15 | 中铁十九局集团第六工程有限公司 | Method for dismantling highway-span iron bridge |
| CN111778884A (en) * | 2020-07-16 | 2020-10-16 | 保利长大工程有限公司 | Construction method for dismantling over-water suspended arch bridge |
| CN112252212A (en) * | 2020-10-27 | 2021-01-22 | 中交路桥华南工程有限公司 | Method for dismantling prestressed concrete variable cross-section continuous beam bridge |
| CN112575697A (en) * | 2020-12-16 | 2021-03-30 | 浙大城市学院 | Rapid dismantling system and construction method for multi-layer overpass concrete continuous box girder ramp bridge |
| CN113774807A (en) * | 2021-09-29 | 2021-12-10 | 安徽省公路桥梁工程有限公司 | Upper-span bridge swivel construction method applied to narrow and limited operation space |
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