CN111778884A - Construction method for dismantling over-water suspended arch bridge - Google Patents
Construction method for dismantling over-water suspended arch bridge Download PDFInfo
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- CN111778884A CN111778884A CN202010687238.1A CN202010687238A CN111778884A CN 111778884 A CN111778884 A CN 111778884A CN 202010687238 A CN202010687238 A CN 202010687238A CN 111778884 A CN111778884 A CN 111778884A
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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
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
- B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
- B02C19/00—Other disintegrating devices or methods
- B02C19/0056—Other disintegrating devices or methods specially adapted for specific materials not otherwise provided for
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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
- E01D4/00—Arch-type bridges
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02F—DREDGING; SOIL-SHIFTING
- E02F5/00—Dredgers or soil-shifting machines for special purposes
- E02F5/28—Dredgers or soil-shifting machines for special purposes for cleaning watercourses or other ways
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Abstract
The invention discloses a construction method for dismantling a water suspension arch bridge, which comprises the following steps of dismantling from 7 th span to 12 th span, dismantling 9-12 th span by adopting the same process steps as the 13 th span, dismantling from 12 th span to 9 th span in sequence, dismantling hole by hole in sequence, ensuring that the distance between a long-arm gun machine and a dismantling hole site meets the safe distance, dismantling 8 th span and 7 th span according to the same process requirements, chiseling corresponding piers and enlarging a foundation after dismantling the upper structure of each span of a pilot bridge, and clearing away stone ballast and concrete materials scattered in the site to a slag-soil field so as to provide an operation site for chiseling a subsequent bridge with a span; the construction method for dismantling the overwater suspension arch bridge avoids operation of mechanical equipment and personnel on an old bridge, reduces the safety risk of dismantling the old bridge, is simple and clear in bridge dismantling construction process, is easy to operate and popularize, and meanwhile, the investment of the mechanical equipment is small, consumables such as explosives are not needed, and the operation safety of the construction method is improved.
Description
Technical Field
The invention belongs to the technical field of suspension arch bridge demolition and utilization, and particularly relates to a construction method for demolishing an overwater suspension arch bridge.
Background
The construction method for dismantling the overwater suspended arch bridge is a construction method for dismantling the suspended arch bridge structure by using a long-arm cannon machine and a long-arm excavator.
Compared with the file CN106758887A, the method for lowering and dismantling the whole continuous girder bridge adopts a buttress system module and a lowering system module; the continuous beam bridge whole-bridge lowering dismantling method comprises the following steps: step one, preparation work, step two, temporary buttress system installation is dismantled to the whole bridge, step three, the temporary buttress is installed, the main beam flange is cut, step four, the whole bridge is put down the system, step five, put down and promote construction etc. synchronously; the buttress system module comprises a steel pipe pile, a temporary buttress parallel connection and a transverse connecting beam, and compared with the invention, the invention has lower working efficiency.
The existing construction method for dismantling the overwater suspended arch bridge has certain defects in the operation process, when a user conducts bridge dismantling operation through the traditional construction method for dismantling the overwater suspended arch bridge, the conventional construction scheme for dismantling the overwater suspended arch bridge is blasting construction or large ship matched cutting and hoisting construction, and by referring to similar engineering construction experience, the blasting construction can cause damage to surrounding buildings, has certain influence on surrounding dense residential areas, and the surrounding brick-built old houses are too many to be suitable for old urban areas with poor house structure seismic resistance; in addition, the traditional blasting construction has long time for batch reporting procedures and more personnel investment, and the overwater blasting construction also needs a ship to be matched with a drill hole, so that emergency dismantling and danger elimination of a dangerous bridge are not facilitated; in addition, the traditional blasting construction needs drilling construction on an old bridge, the construction safety risk is large, the requirement on the channel level of the old bridge is high when a large ship is matched with mechanical block cutting, hoisting and dismantling, meanwhile, the cutting, hoisting and dismantling technology is generally suitable for dismantling bridges with better integrity, such as reinforced concrete bridges, steel bridges and the like, and is not suitable for masonry structure bridges, such as masonry arch bridge structures and the like; in addition, no matter the blasting scheme or the construction method of cutting and hoisting a large ship is adopted, the number of workers is large, the safety risk is large, the construction speed is low, and the technical problem of emergency dismantling of the water-suspended arch bridge in the dense residential area cannot be quickly solved; meanwhile, the efficiency of the traditional suspension arch bridge demolition construction operation is low, and the time required by the traditional suspension arch bridge demolition construction operation is prolonged.
Disclosure of Invention
In order to overcome the defects that when a user conducts bridge body dismantling operation through a traditional overwater suspension arch bridge dismantling construction method, the conventional construction scheme for dismantling an overwater old bridge is blasting construction or large ship matched cutting and hoisting construction, and referring to similar engineering construction experience, peripheral houses are damaged due to blasting construction, certain influence is caused on peripheral adjacent dense residential areas, and peripheral brick old houses are too many to be suitable for old urban areas with poor house structure earthquake resistance; in addition, the traditional blasting construction has long time for batch reporting procedures and more personnel investment, and the overwater blasting construction also needs a ship to be matched with a drill hole, so that emergency dismantling and danger elimination of a dangerous bridge are not facilitated; in addition, the traditional blasting construction needs drilling construction on an old bridge, the construction safety risk is large, the requirement on the channel level of the old bridge is high when a large ship is matched with mechanical block cutting, hoisting and dismantling, meanwhile, the cutting, hoisting and dismantling technology is generally suitable for dismantling bridges with better integrity, such as reinforced concrete bridges, steel bridges and the like, and is not suitable for masonry structure bridges, such as masonry arch bridge structures and the like; in addition, no matter the blasting scheme or the construction method of cutting and hoisting a large ship is adopted, the number of workers is large, the safety risk is large, the construction speed is low, and the technical problem of emergency dismantling of the water-suspended arch bridge in the dense residential area cannot be quickly solved; meanwhile, the efficiency of the traditional suspension arch bridge demolition construction operation is low, the time required by the traditional suspension arch bridge demolition construction operation is increased, and the overwater suspension arch bridge demolition construction method is provided.
The purpose of the invention is realized by the following technical scheme:
a construction method for dismantling an overwater suspended arch bridge comprises the following specific steps:
s1, setting warning, setting a river channel navigation inhibition warning area in the river channel range, configuring a warning ship in the warning area for timing warning, and setting construction warning areas on two sides of the river channel;
s2, removing the 13 th span, removing billboards, communication pipes, water supply pipelines and auxiliary facilities on two sides of the approach bridge by crane equipment, and arranging long-arm cannon machines on two sides of the approach bridge respectively, firstly chiseling anti-collision guardrails and sidewalk boards on two sides of the bridge, then chiseling bridge deck and arch part fillers in sequence, and removing stone ballast weights on the upper part of the arch ring by a long-arm excavator;
s3, removing the 13 th-span arch ring, chiseling the 13 th-span arch ring at the midspan position by using a long-arm gun machine after the upper structure of the arch ring is removed, chiseling the arch ring, chiseling a pier stud and expanding a foundation after the arch ring is chiseled, crushing large blocks of stones by using the gun machine after the structure is chiseled, and conveying the crushed stones to a slag abandoning field by adopting an excavator and a muck truck for ensuring safety, wherein the longitudinal horizontal distance is more than or equal to 6m, and the transverse horizontal distance is more than or equal to 8m, and the gun machine is matched with a slag car for loading and conveying the crushed stones to the slag abandoning field;
s4, dismantling from the 7 th span to the 12 th span, adopting the same process steps as the 13 th span, dismantling 9-12 th spans, dismantling from the 12 th span to the 9 th span in the sequence, dismantling hole by hole in sequence, ensuring that the distance between a long-arm gun machine and a dismantling hole site meets the safety distance, dismantling 8 th spans and 7 th spans according to the same process requirements, chiseling corresponding piers and enlarging foundations after dismantling the upper structure of each span of the approach bridge, and clearing and transporting materials such as stone slag, concrete and the like scattered in the site to a slag soil field so as to provide an operation site for chiseling subsequent bridges across the diameter;
s5, dismantling the 6 th span, respectively arranging long-arm cannon machines on the two sides of the 7 th span, chiseling the anti-collision guardrails on the two sides, chiseling the pedestrian passageways and the bridge decks, adopting a long-arm excavator to clean broken stone slag, chiseling the arch filler and the abdominal arches, then chiseling the abdominal arch columns, and adopting the long-arm excavator to clean heavy objects such as the stone slag, concrete and the like scattered on the upper part of the main arch ring;
s6, dismantling the arch ring of the 6 th span, respectively arranging long-arm cannon machines on two sides of the 7 th span, chiseling anti-collision guardrails on two sides, chiseling pedestrian passageways and bridge decks, adopting a long-arm excavator to clean broken stone slag, chiseling arch filler and abdominal arches, chiseling abdominal arch columns, and adopting the long-arm excavator to clean the stone slag scattered on the upper part of the main arch ring;
s7, erecting a steel trestle, erecting the steel trestle at a position 8m upstream of the water level of the 5 th to 6 th piers of the bridge, wherein the steel trestle is made of a steel pipe pile, a bailey truss, transverse I-steel, a distribution beam and a steel bridge deck structure, the horizontal distance from the side line of the steel trestle to the horizontal direction of the arch bridge is 8m, and the distance from the side line of the bridge pier of the 5 th pier to the steel trestle in the bridge direction is 6 m;
s8, removing the 5 th span, chiseling the anti-collision railing and the sidewalk board on one side of the pier top position of the 5 th pier on the platform at the end part of the steel trestle by using a long-arm cannon machine, chiseling bridge floor and arch part fillers, chiseling an abdominal arch and an abdominal arch column, wherein the operating radius range of the long-arm cannon machine is 14m-18m according to the change of vertical height, and the long-arm cannon machine cannot chiseling the structures on the upper parts of all arch rings, so that the 4m operating platform is transversely added at the end part of the steel trestle, chiseling of the structures on the upper parts of the rest arch rings can be completed on the operating platform, and a long-arm excavator is used for removing the heavy objects such as stone slag, concrete;
s9, removing the 5 th span arch ring, after the upper structure of the arch ring is removed, chiseling the 5 th span arch ring at the arch foot position of the 5 th pier by using a long-arm gun to complete the removal of the 5 th span upper structure, and after the 5 th span and the 6 th span upper structure are removed, cleaning the river channel by using a grab ship and a transport ship;
s10, removing a 1 st span, respectively finishing a construction sidewalk and a construction platform on two sides of a zero pier, respectively arranging long-arm cannon machines on two sides of the zero span, chiseling anti-collision guardrails on two sides, chiseling a pedestrian passageway and a bridge deck, removing broken stone slag by using a long-arm excavator, chiseling arch filler and an abdominal arch, chiseling an abdominal arch column, and removing the stone slag scattered on the upper part of a main arch ring by using the long-arm excavator;
s11, dismantling the 1 st span arch ring, after dismantling the upper structure of the arch ring, chiseling the 1 st span arch ring at the arch foot position of a zero pier by using a long-arm gun machine to complete the breaking and the lowering of the 1 st span upper structure, adopting the long-arm gun machine and an excavator and matching with a muck truck to break the block structure scattered on land, and loading and transporting the block structure to a slag disposal site;
s12, erecting a steel trestle, erecting the steel trestle at a position 8m from the zero pier to the upstream of the water level of the bridge with the No. 1 pier, wherein the side line of the steel trestle is horizontally 8m away from the side line of the arch bridge position, and the side line of the steel trestle is erected along the bridge to a position 6m away from the side line of the pier with the No. 1 pier;
s13, dismantling the 2 nd span, chiseling an anti-collision railing and a sidewalk board on one side of the pier top position of the 5 th pier on a platform at the end part of the steel trestle by using a long-arm cannon machine, chiseling bridge floor and arch part fillers, chiseling an abdominal arch and an abdominal arch column, wherein the operating radius range of the long-arm cannon machine is 14m-18m according to the change of vertical height, and the long-arm cannon machine cannot chiseling structures on the upper parts of all arch rings, so that a 4m operating platform is transversely added at the end part of the steel trestle, and chiseling of the structures on the upper parts of the rest arch rings can be completed on the operating platform;
s14, removing the 2 nd-span arch ring, after the upper structure of the arch ring is removed, chiseling the 2 nd-span arch ring at the 1 st pier arch foot position by using a long-arm gun, completing the breaking and the lowering of the 2 nd-span upper structure, and after the 1 st span and the 2 nd span upper structure are removed, cleaning the river channel by using a grab ship and a transport ship;
s15, erecting a steel trestle to a pier position, erecting a steel trestle from a zero pier to a No. 1 pier side, similarly lengthening a No. 5 pier and a No. 6 pier to a No. 2 pier, transversely erecting a construction platform to the pier position side at the No. 2 pier, the No. 3 pier, the No. 4 pier and the No. 5 pier positions, arranging a navigation hole between the No. 1 pier and the No. 2 pier, and removing heavy objects such as stone slag, concrete and the like scattered on the upper part of the arch ring by using a long-arm excavator;
s16, dismantling piers, namely erecting dismantling platforms at the 1 st pier to the first pier respectively, chiseling an old bridge underwater pier structure and an open caisson by using a long-arm cannon machine and a percussion drill after the platforms are erected, removing the chiseled stone slag by using a mode of alternately operating the long-arm cannon machine and the long-arm excavator, cleaning the stone slag, transporting the stone slag to a slag abandoning field by using a muck vehicle, dismantling the construction platform and dismantling the steel trestle after the dismantling of all bridge structures is completed;
and S17, cleaning the river channel, removing the steel trestle, cleaning the river channel by using a grab ship, and transporting the sludge to a sludge disposal site by using a transport ship.
As a further scheme of the invention, the steel trestle is formed by combining a steel pipe pile, a Bailey truss, transverse I-steel, a distribution beam and a steel bridge deck structure.
As a further scheme of the invention, the long-arm cannon machine comprises a movable base, a rotary table and a rotary arm, wherein the rotary table is movably arranged at the upper part of the movable base, the rotary base is arranged between the rotary table and the movable base, the rotary table and the movable base are movably connected through the rotary base, the rotary arm is movably arranged at one side of the rotary table, a second hydraulic rod is arranged between the rotary arm and the rotary table, and the rotary arm and the rotary table are movably connected through the second hydraulic rod.
As a further scheme of the invention, the outer surface of one end of the rotating arm is provided with a punching gun rod, the middle part of the rotating arm is movably provided with a rotating shaft, and the upper part of the rotating arm is provided with a first hydraulic rod.
As a further scheme of the invention, a combined cutting sleeve is fixedly sleeved on the outer surface of the side edge of the punching gun rod, a first combined column is fixedly installed on one side of the combined cutting sleeve, and a second combined column is fixedly installed on the other side of the combined cutting sleeve.
As a further scheme of the invention, the integral structure of the combined cutting sleeve is a cylindrical hollow structure, an inner sleeve ring is sleeved inside the combined cutting sleeve, steering grooves are formed in the inner sides of the combined cutting sleeve and the inner sleeve ring, and a positioning clamping bolt is sleeved on the inner surface of each steering groove.
As a further scheme of the invention, the outer surface of the top end of the punching gun rod is fixedly provided with a fixed screw head, and the inner side of the upper part of the punching gun rod is provided with a vibration groove.
As a further scheme of the invention, the side edge of the movable base is movably provided with a crawler belt, and one side of the rotating platform is fixedly provided with a ventilating plate.
As a further scheme of the invention, two groups of butt joint rotating shafts are sleeved between the combined cutting sleeve and the inner lantern ring, and the combined cutting sleeve and the inner lantern ring are movably connected through the butt joint rotating shafts.
The invention has the beneficial effects that:
1. the construction method for dismantling the overwater suspended arch bridge is based on the characteristics of a building block structure of the upper structure of the overwater suspended arch bridge, the stress principle of the arch bridge and the stress principle of a brake pier, comprehensively considers the old bridge in the dense residential area of the old city and the surrounding environment with complex local traffic, adopts conventional mechanical equipment such as a large-scale long-arm cannon machine matched impact drilling machine to carry out dismantling construction, adopts the dismantling mode of an erected assembly type trestle and long-arm cannon machine to dismantle the lower structure of the underwater old masonry bridge structure, uses a conventional salvage ship to clear a river bed after dismantling, realizes the dismantling construction of the upper structure of the suspended arch bridge, does not need consumables such as explosive and the like, simultaneously has less investment on mechanical equipment and simple equipment type, effectively analyzes the characteristics of the building block structure of the suspended arch bridge and the thrust principle of arch feet, and adopts the large-scale long-arm cannon machine to chisel the arch feet to realize the integral dismantling of the whole collapsed arch, the construction method for dismantling the overwater suspension arch bridge solves the problems of large damage, long time and high input cost of the traditional blasting construction, avoids the operation of mechanical equipment and personnel on the old bridge, and reduces the safety risk of dismantling the old bridge.
2. According to the construction method for dismantling the overwater suspension arch bridge, the stress characteristics of the 'braking piers' and the 'common piers' of the suspension arch bridge are utilized, the braking piers are used as a segmented interface, the multi-span arch bridge superstructure between the two braking piers is dismantled in a chain mode, aiming at the condition that the suspension arch bridge needs to be rebuilt in situ after the old bridge is dismantled, the old bridge dismantling structure conflicts with the newly-built bridge structure, the construction of the newly-built bridge substructure is combined, the old bridge pier body and the open caisson are dismantled by adopting the long-arm underwater cannon and the impact drilling machine, the impact drilling machine is used for breaking the open caisson of the old bridge at the pile foundation part of the newly-built bridge for accurate dismantling, the quick conversion from the old bridge to the newly-built bridge is achieved, the dismantling efficiency of the overwater suspension arch bridge is effectively improved, the dismantling construction.
3. Through setting up the combination cutting ferrule, when the user utilizes this construction method is demolishd to the suspension arch bridge on water to carry out the bridge body and demolishs the operation, utilize the combination cutting ferrule to install first combination post and second combination post additional on the punching press gun pole, can make this construction method is demolishd to the suspension arch bridge on water long-armed gun machine among the construction method have three gun pole structures, when the user carries out bridge body crushing operation through this long-armed gun machine, utilize first combination post of punching press gun pole cooperation and second combination post can effectively promote the work efficiency of long-armed gun machine, required time when reducing this construction method is demolishd to the suspension arch bridge on water and bridge body crushing operation.
4. Through setting up interior lantern ring and butt joint pivot, when this construction method is demolishd to suspension arch bridge on water carries out the pontic and demolishs the operation, the user can be through rotating the location trip, make and loosen between interior lantern ring and the combination cutting ferrule, utilize the butt joint pivot to rotate interior lantern ring and combination cutting ferrule, adjust the angle of use of first combination post and second combination post on the combination cutting ferrule, thereby make first combination post and second combination post have the rotation regulation structure, the optimization is to the use of combination cutting ferrule, when the user utilizes the punching press big gun pole that is equipped with first combination post and second combination post additional to carry out pontic crushing operation, utilize the setting of interior lantern ring and butt joint pivot, can adjust the angle of use of first combination post and second combination post, thereby promote the flexibility ratio when this construction method is demolishd to water operation.
Drawings
The invention will be further described with reference to the accompanying drawings.
Fig. 1 is an overall configuration diagram of the long arm cannon machine of the present invention.
Fig. 2 is an overall configuration view of a long arm gun punch gun barrel in the present invention.
Fig. 3 is an internal structure view of the long arm gun combination cutting sleeve in the invention.
In the figure: 1. rotating the base; 2. a crawler belt; 3. moving the base; 4. a ventilation board; 5. a rotating table; 6. a first hydraulic lever; 7. a rotating arm; 8. punching a gun rod; 9. a rotating shaft; 10. a second hydraulic rod; 11. a first combination post; 12. a second combination post; 13. positioning the clamping bolt; 14. fixing the screw head; 15. a vibration groove; 16. combining the card sleeves; 17. an inner collar; 18. a steering groove; 19. and (6) butting the rotating shaft.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the embodiments of the present invention, and it is obvious 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.
As shown in fig. 1-3, a construction method for dismantling an overwater suspended arch bridge specifically comprises the following steps:
s1, setting warning, setting a river channel navigation inhibition warning area in the river channel range, configuring a warning ship in the warning area for timing warning, and setting construction warning areas on two sides of the river channel;
s2, removing the 13 th span, removing billboards, communication pipes, water supply pipelines and auxiliary facilities on two sides of the approach bridge by crane equipment, and arranging long-arm cannon machines on two sides of the approach bridge respectively, firstly chiseling anti-collision guardrails and sidewalk boards on two sides of the bridge, then chiseling bridge deck and arch part fillers in sequence, and removing stone ballast weights on the upper part of the arch ring by a long-arm excavator;
s3, removing the 13 th-span arch ring, chiseling the 13 th-span arch ring at the midspan position by using a long-arm gun machine after the upper structure of the arch ring is removed, chiseling the arch ring, chiseling a pier stud and expanding a foundation after the arch ring is chiseled, crushing large blocks of stones by using the gun machine after the structure is chiseled, and conveying the crushed stones to a slag abandoning field by adopting an excavator and a muck truck for ensuring safety, wherein the longitudinal horizontal distance is more than or equal to 6m, and the transverse horizontal distance is more than or equal to 8m, and the gun machine is matched with a slag car for loading and conveying the crushed stones to the slag abandoning field;
s4, dismantling from the 7 th span to the 12 th span, adopting the same process steps as the 13 th span, dismantling 9-12 th spans, dismantling from the 12 th span to the 9 th span in the sequence, dismantling hole by hole in sequence, ensuring that the distance between a long-arm gun machine and a dismantling hole site meets the safety distance, dismantling 8 th spans and 7 th spans according to the same process requirements, chiseling corresponding piers and enlarging foundations after dismantling the upper structure of each span of the approach bridge, and clearing and transporting materials such as stone slag, concrete and the like scattered in the site to a slag soil field so as to provide an operation site for chiseling subsequent bridges across the diameter;
s5, dismantling the 6 th span, respectively arranging long-arm cannon machines on the two sides of the 7 th span, chiseling the anti-collision guardrails on the two sides, chiseling the pedestrian passageways and the bridge decks, adopting a long-arm excavator to clean broken stone slag, chiseling the arch filler and the abdominal arches, then chiseling the abdominal arch columns, and adopting the long-arm excavator to clean heavy objects such as the stone slag, concrete and the like scattered on the upper part of the main arch ring;
s6, dismantling the 6 th span arch ring, respectively arranging long-arm cannon machines on two sides of the 7 th span, chiseling anti-collision guardrails on two sides, chiseling pedestrian passageways and bridge decks, adopting a long-arm excavator to clean broken stone slag, chiseling arch filler and abdominal arches, chiseling abdominal arch columns, and adopting the long-arm excavator to clean the stone slag scattered on the upper part of the main arch ring;
s7, erecting a steel trestle, wherein the steel trestle is erected at a position 8m away from the water level upstream of the 5 th to 6 th piers of the bridge, and is made of a steel pipe pile, a bailey truss, transverse I-steel, a distribution beam and a steel bridge deck structure, the horizontal distance from the side line of the steel trestle to the horizontal direction of the arch bridge is 8m, and the distance from the side line of the pier of the 5 th pier to the steel trestle in the bridge direction is 6 m;
s8, removing a 5 th span, chiseling an anti-collision railing and a sidewalk plate on one side of the top position of a 5 th pier on a platform at the end part of the steel trestle by using a long-arm cannon machine, chiseling bridge floor and arch fillers, chiseling an abdominal arch and an abdominal arch column, wherein the operating radius range of the long-arm cannon machine is 14m-18m according to the change of vertical height, and the long-arm cannon machine cannot chisel structures on the upper parts of all arch rings, so that the 4m operating platform is transversely added at the end part of the steel trestle, chiseling of the structures on the upper parts of the rest arch rings can be completed on the operating platform, and heavy objects such as stone slag, concrete and the like scattered on the upper parts of the arch rings are removed by;
s9, removing the 5 th span arch ring, after the upper structure of the arch ring is removed, chiseling the 5 th span arch ring at the arch foot position of the 5 th pier by using a long-arm gun to complete the removal of the 5 th span upper structure, and after the 5 th span and the 6 th span upper structure are removed, cleaning the river channel by using a grab ship and a transport ship;
s10, removing the 1 st span, respectively finishing a construction sidewalk and a construction platform on two sides of a zero pier, respectively arranging long-arm cannon machines on two sides of the zero span, chiseling anti-collision guardrails on two sides, chiseling a pedestrian passageway and a bridge deck, removing broken stone slag by using a long-arm excavator, chiseling arch filler and an abdominal arch, chiseling an abdominal arch column, and removing the stone slag scattered on the upper part of a main arch ring by using the long-arm excavator;
s11, removing the 1 st span arch ring, after the upper structure of the arch ring is removed, chiseling the 1 st span arch ring at the arch foot position of a zero pier by using a long-arm gun machine to finish the removal and the lowering of the 1 st span upper structure, crushing the block structure scattered on the land by using the long-arm gun machine and an excavator and matching with a muck truck, and loading and transporting the block structure to a slag disposal site;
s12, erecting a steel trestle, erecting the steel trestle at a position 8m from the zero pier to the upstream of the water level of the bridge with the No. 1 pier, wherein the lateral line of the steel trestle is horizontally 8m away from the lateral line of the bridge position of the arch bridge, and the lateral line of the steel trestle is erected along the bridge until the distance from the lateral line of the bridge pier of the No. 1 pier is 6 m;
s13, dismantling the 2 nd span, chiseling an anti-collision railing and a sidewalk board on one side of the pier top position of the 5 th pier on a platform at the end part of the steel trestle by using a long-arm cannon machine, chiseling bridge floor and arch part fillers, chiseling an abdominal arch and an abdominal arch column, wherein the operating radius range of the long-arm cannon machine is 14m-18m according to the change of vertical height, and the long-arm cannon machine cannot chiseling structures on the upper parts of all arch rings, so that a 4m operating platform is transversely added at the end part of the steel trestle, and chiseling of the structures on the upper parts of the rest arch rings can be completed on the operating platform;
s14, removing the 2 nd span arch ring, after the upper structure of the arch ring is removed, chiseling the 2 nd span arch ring at the 1 st pier arch foot position by using a long-arm gun machine to complete the breaking and the lowering of the 2 nd span upper structure, and after the 1 st span and the 2 nd span upper structure are removed, cleaning the river channel by using a grab ship and a transport ship;
s15, erecting a steel trestle to a pier position, erecting a steel trestle from a zero pier to a No. 1 pier side, similarly lengthening a No. 5 pier and a No. 6 pier to a No. 2 pier, transversely erecting a construction platform to the pier position side at the No. 2 pier, the No. 3 pier, the No. 4 pier and the No. 5 pier positions, arranging a navigation hole between the No. 1 pier and the No. 2 pier, and removing heavy objects such as stone slag, concrete and the like scattered on the upper part of the arch ring by using a long-arm excavator;
s16, dismantling piers, namely erecting dismantling platforms at the 1 st pier to the first pier respectively, chiseling an old bridge underwater pier structure and an open caisson by using a long-arm shot blasting machine and a percussion drill after the platforms are erected, removing chiseled stone slag by using a mode of alternately operating the long-arm shot blasting machine and the long-arm excavator, cleaning the stone slag, transporting the stone slag to a slag abandoning field by using a muck vehicle, and dismantling the construction platform and the steel trestle after the dismantling of all bridge structures is completed;
s17, cleaning the river channel, after the steel trestle is removed, cleaning the river channel by using a grab ship, and transporting the sludge to a sludge disposal site by using a transport ship.
The steel trestle is composed of a steel pipe pile, a bailey truss, transverse I-shaped steel, a distribution beam and a steel bridge deck structure.
Long arm big gun machine is including removing base 3, revolving stage 5 and swinging boom 7, 5 movable mounting of revolving stage are on the upper portion of removing base 3, revolving stage 5 with remove and be equipped with rotating base 1 between the base 3, revolving stage 5 passes through rotating base 1 swing joint with removing base 3, 7 movable mounting of swinging boom are in one side of revolving stage 5, be equipped with second hydraulic stem 10 between swinging boom 7 and the revolving stage 5, swinging boom 7 and revolving stage 5 pass through second hydraulic stem 10 swing joint.
The outer surface of one end of swinging boom 7 is equipped with punching press big gun pole 8, and the middle part position movable mounting of swinging boom 7 has rotation axis 9, and the upper portion of swinging boom 7 is equipped with first hydraulic stem 6, utilizes first hydraulic stem 6 cooperation rotation axis 9 can adjust the angle of use of swinging boom 7.
The outer surface of the side edge of the punching gun rod 8 is fixedly sleeved with a combined clamping sleeve 16, a first combined column 11 is fixedly installed on one side of the combined clamping sleeve 16, and a second combined column 12 is fixedly installed on the other side of the combined clamping sleeve 16.
The overall structure of combination cutting ferrule 16 is cylinder hollow structure, and the interior lantern ring 17 has been cup jointed to the inside of combination cutting ferrule 16, and the inboard of combination cutting ferrule 16 and interior lantern ring 17 has all been seted up and has been turned to groove 18, and the internal surface that turns to groove 18 has cup jointed location gim peg 13.
The outer surface of the top end of the punching gun rod 8 is fixedly provided with a fixed screw head 14, and the inner side of the upper part of the punching gun rod 8 is provided with a vibration groove 15.
The side movable mounting who removes base 3 has track 2, and one side fixed mounting of revolving stage 5 has ventilating board 4, and ventilating board 4 plays the radiating effect to removing base 3 inside.
Two groups of butt joint rotating shafts 19 are sleeved between the combined cutting sleeve 16 and the inner lantern ring 17, and the combined cutting sleeve 16 and the inner lantern ring 17 are movably connected through the butt joint rotating shafts 19.
The invention aims to provide a construction method for dismantling an overwater suspension arch bridge, which is used for dismantling the overwater suspension arch bridge during operation on the basis of the characteristics of a building block structure of the upper structure of the overwater suspension arch bridge, the stress principle of the arch bridge and the stress principle of a brake pier, comprehensively considering the old bridge in a dense residential area of an old city and the surrounding environment with complex local traffic, and adopting conventional mechanical equipment such as a large-scale long-arm gun machine matched impact drilling machine and the like, dismantling the lower part structure of the underwater old bridge by adopting a dismantling mode of erecting an assembly type trestle and a long-arm gun machine, clearing a river bed by using a conventional salvage ship after dismantling, dismantling the upper part structure of the suspension arch bridge, needing no consumables such as explosives and the like, and simultaneously reducing the investment of the mechanical equipment, The equipment type is simple, the arch foot is removed by a large-scale long-arm gun machine chisel to realize the integral demolition of the whole arch through effectively analyzing the building block structure characteristic and the arch foot thrust principle of the suspension arch bridge, the problems of large damage, long time and high input cost of the traditional blasting construction are solved through the overwater suspension arch bridge demolition construction method, the operation of mechanical equipment and personnel on an old bridge is avoided, and the safety risk of demolishing the old bridge is reduced;
according to the construction method for dismantling the overwater suspension arch bridge, the braking piers are used as segmented interfaces according to the stress characteristics of the structures of the braking piers and the common piers of the suspension arch bridge, the linked dismantling of the upper structure of the multi-span arch bridge between the two braking piers is realized, and for the condition that the original reconstruction is needed after the dismantling of the old bridge of the suspension arch bridge, the dismantling structure of the old bridge conflicts with the structure of the newly-built bridge, the construction of the lower structure of the newly-built bridge is combined, the pier body and the open caisson of the old pier are dismantled by adopting a long-arm underwater cannon machine and an impact drilling machine, and the open caisson of the old bridge at the pile foundation part of the newly-built bridge is punctured by the impact drilling machine for accurate dismantling, so that the quick conversion from the dismantling of the old bridge to the newly-built bridge is realized, the dismantling;
by arranging the combined cutting sleeve 16, when a user carries out bridge body demolition operation by using the above-water suspension arch bridge demolition construction method, the combined cutting sleeve 16 is utilized to additionally install the first combined column 11 and the second combined column 12 on the punch gun rod 8, so that the long-arm gun in the above-water suspension arch bridge demolition construction method has a three-gun-rod structure, when the user carries out bridge body crushing operation by using the long-arm gun, the work efficiency of the long-arm gun can be effectively improved by utilizing the punch gun rod 8 to match the first combined column 11 and the second combined column 12, and the time required by bridge body crushing operation of the above-water suspension arch bridge demolition construction method is reduced;
by arranging the inner lantern ring 17 and the butt joint rotating shaft 19, when the bridge body is dismantled by the method for constructing the water suspension arch bridge, a user can rotate the positioning clamp 13, so that the inner sleeve ring 17 and the combined cutting sleeve 16 are loosened, the inner sleeve ring 17 and the combined cutting sleeve 16 are rotated by the butt-joint rotating shaft 19, the use angles of the first combined column 11 and the second combined column 12 on the combined cutting sleeve 16 are adjusted, therefore, the first combination column 11 and the second combination column 12 have a rotary adjusting structure, the use of the combination cutting sleeve 16 is optimized, when a user uses the punching gun rod 8 additionally provided with the first combination column 11 and the second combination column 12 to carry out the bridge body crushing operation, the arrangement of the inner lantern ring 17 and the butt joint rotating shaft 19 is utilized, the use angles of the first combined column 11 and the second combined column 12 can be adjusted, so that the flexibility of the construction method for dismantling the water suspension arch bridge is improved.
The preferred embodiments of the invention disclosed above are intended to be illustrative only. Preferred embodiments are not exhaustive of all the details of the embodiments. 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 (9)
1. A construction method for dismantling an overwater suspended arch bridge is characterized by comprising the following specific steps:
s1, setting warning, setting a river channel navigation inhibition warning area in the river channel range, configuring a warning ship in the warning area for timing warning, and setting construction warning areas on two sides of the river channel;
s2, removing the 13 th span, removing billboards, communication pipes, water supply pipelines and auxiliary facilities on two sides of the approach bridge by crane equipment, and arranging long-arm cannon machines on two sides of the approach bridge respectively, firstly chiseling anti-collision guardrails and sidewalk boards on two sides of the bridge, then chiseling bridge deck and arch part fillers in sequence, and removing stone ballast weights on the upper part of the arch ring by a long-arm excavator;
s3, removing the 13 th span arch ring, chiseling the 13 th span arch ring at the midspan position by using a long-arm gun machine after the upper structure of the arch ring is removed, chiseling the arch ring, chiseling a pier stud and expanding a foundation after the arch ring is chiseled, crushing large stones by using the gun machine after the structure is chiseled, and conveying the stones to a slag abandoning field by using an excavator matched with a slag car;
s4, dismantling from the 7 th span to the 12 th span, adopting the same process steps as the 13 th span, dismantling 9-12 th spans, dismantling from the 12 th span to the 9 th span in the sequence, dismantling hole by hole in sequence, ensuring that the distance between a long-arm gun machine and a dismantling hole site meets the safety distance, dismantling 8 th spans and 7 th spans according to the same process requirements, chiseling corresponding piers and enlarging foundations after dismantling the upper structure of each span of the approach bridge, and clearing and transporting stone slag and concrete materials scattered in the site to a slag-soil yard so as to provide an operation site for chiseling subsequent bridges across the diameter;
s5, dismantling the 6 th span, respectively arranging long-arm cannon machines on the two sides of the 7 th span, chiseling the anti-collision guardrails on the two sides, chiseling the pedestrian passageways and the bridge decks, adopting a long-arm excavator to clean broken stone slag, chiseling the arch filler and the abdominal arches, then chiseling the abdominal arch pillars, and adopting the long-arm excavator to clean the stone slag scattered on the upper part of the main arch ring;
s6, dismantling the arch ring of the 6 th span, respectively arranging long-arm cannon machines on two sides of the 7 th span, chiseling anti-collision guardrails on two sides, chiseling pedestrian passageways and bridge decks, adopting a long-arm excavator to clean broken stone slag, chiseling arch filler and abdominal arches, chiseling abdominal arch columns, and adopting the long-arm excavator to clean the stone slag scattered on the upper part of the main arch ring;
s7, erecting a steel trestle, erecting the steel trestle at a position 8m away from the upstream of the water level of the 5 th to the 6 th piers of the bridge, wherein the lateral line of the steel trestle is 8m away from the lateral line of the arch bridge position horizontally, and the lateral line of the steel trestle is erected to a position 6m away from the lateral line of the pier of the 5 th pier along the bridge;
s8, removing the 5 th span, chiseling an anti-collision railing and a sidewalk plate on one side of the pier top position of the 5 th pier on a platform at the end part of the steel trestle by using a long-arm cannon machine, chiseling bridge floor and arch part fillers, chiseling an abdominal arch and an abdominal arch column, wherein the operating radius range of the long-arm cannon machine is 14-18 m according to the change of vertical height;
s9, removing the 5 th span arch ring, after the upper structure of the arch ring is removed, chiseling the 5 th span arch ring at the arch foot position of the 5 th pier by using a long-arm gun to complete the removal of the 5 th span upper structure, and after the 5 th span and the 6 th span upper structure are removed, cleaning the river channel by using a grab ship and a transport ship;
s10, removing a 1 st span, respectively finishing a construction sidewalk and a construction platform on two sides of a zero pier, respectively arranging long-arm cannon machines on two sides of the zero span, chiseling anti-collision guardrails on two sides, chiseling a pedestrian passageway and a bridge deck, removing broken stone slag by using a long-arm excavator, chiseling arch filler and an abdominal arch, chiseling an abdominal arch column, and removing the stone slag scattered on the upper part of a main arch ring by using the long-arm excavator;
s11, dismantling the 1 st span arch ring, after dismantling the upper structure of the arch ring, chiseling the 1 st span arch ring at the arch foot position of a zero pier by using a long-arm gun machine to complete the breaking and the lowering of the 1 st span upper structure, adopting the long-arm gun machine and an excavator and matching with a muck truck to break the block structure scattered on land, and loading and transporting the block structure to a slag disposal site;
s12, erecting a steel trestle, erecting the steel trestle at a position 8m from the zero pier to the upstream of the water level of the bridge with the No. 1 pier, wherein the side line of the steel trestle is horizontally 8m away from the side line of the arch bridge position, and the side line of the steel trestle is erected along the bridge to a position 6m away from the side line of the pier with the No. 1 pier;
s13, dismantling the 2 nd span, chiseling an anti-collision railing and a sidewalk plate on one side of the pier top position of the 5 th pier on a platform at the end part of the steel trestle by using a long-arm cannon machine, chiseling bridge floor and arch part fillers, chiseling an abdominal arch and an abdominal arch column, wherein the operating radius range of the long-arm cannon machine is 14m-18m according to the change of vertical height;
s14, removing the 2 nd-span arch ring, after the upper structure of the arch ring is removed, chiseling the 2 nd-span arch ring at the 1 st pier arch foot position by using a long-arm gun, completing the breaking and the lowering of the 2 nd-span upper structure, and after the 1 st span and the 2 nd span upper structure are removed, cleaning the river channel by using a grab ship and a transport ship;
s15, erecting a steel trestle to a pier position, erecting a steel trestle from a zero pier to a No. 1 pier side, similarly lengthening a No. 5 pier and a No. 6 pier to a No. 2 pier, transversely erecting a construction platform to the pier position side at the No. 2 pier, the No. 3 pier, the No. 4 pier and the No. 5 pier positions, arranging a navigation hole between the No. 1 pier and the No. 2 pier, and removing the stone slag scattered on the upper part of the arch ring by using a long-arm excavator;
s16, dismantling piers, namely erecting dismantling platforms at the 1 st pier to the first pier respectively, chiseling an old bridge underwater pier structure and an open caisson by using a long-arm cannon machine and a percussion drill after the platforms are erected, removing the chiseled stone slag by using a mode of alternately operating the long-arm cannon machine and the long-arm excavator, cleaning the stone slag, transporting the stone slag to a slag abandoning field by using a muck vehicle, dismantling the construction platform and dismantling the steel trestle after the dismantling of all bridge structures is completed;
and S17, cleaning the river channel, removing the steel trestle, cleaning the river channel by using a grab ship, and transporting the sludge to a sludge disposal site by using a transport ship.
2. The method for dismantling the overwater suspension arch bridge according to the claim 1, wherein the steel trestle is formed by combining a steel pipe pile, a bailey truss, transverse I-shaped steel, a distribution beam and a steel bridge deck structure.
3. The method for dismantling the over-water suspension arch bridge as recited in claim 1, wherein the long-armed cannon machine comprises a mobile base (3), a rotary table (5) and a rotary arm (7), the rotary table (5) is movably mounted on the upper portion of the mobile base (3), the rotary base (1) is arranged between the rotary table (5) and the mobile base (3), the rotary table (5) and the mobile base (3) are movably connected through the rotary base (1), the rotary arm (7) is movably mounted on one side of the rotary table (5), a second hydraulic rod (10) is arranged between the rotary arm (7) and the rotary table (5), and the rotary arm (7) and the rotary table (5) are movably connected through the second hydraulic rod (10).
4. The method for dismantling the overwater suspension arch bridge according to the claim 3, wherein a punching gun rod (8) is arranged on the outer surface of one end of the rotating arm (7), a rotating shaft (9) is movably mounted in the middle of the rotating arm (7), and a first hydraulic rod (6) is arranged on the upper portion of the rotating arm (7).
5. The method for demolishing the overwater suspended arch bridge as claimed in claim 4, wherein a combined cutting sleeve (16) is fixedly sleeved on the outer surface of the side edge of the punch stem (8), a first combined column (11) is fixedly installed on one side of the combined cutting sleeve (16), and a second combined column (12) is fixedly installed on the other side of the combined cutting sleeve (16).
6. The method for dismantling the overwater suspension arch bridge according to claim 5, wherein the integral structure of the combined cutting sleeve (16) is a cylindrical hollow structure, an inner lantern ring (17) is sleeved inside the combined cutting sleeve (16), turning grooves (18) are formed in the inner sides of the combined cutting sleeve (16) and the inner lantern ring (17), and positioning clamping bolts (13) are sleeved on the inner surfaces of the turning grooves (18).
7. The method for dismantling the overwater suspension arch bridge according to claim 4, wherein a fixed screw head (14) is fixedly arranged on the outer surface of the top end of the punching gun rod (8), and a vibration groove (15) is formed in the inner side of the upper portion of the punching gun rod (8).
8. A method for dismantling an overwater suspension arch bridge according to claim 3 and being characterized in that the side edge of the movable base (3) is movably provided with a crawler (2), and one side of the rotating platform (5) is fixedly provided with a ventilating plate (4).
9. The method for dismantling the overwater suspension arch bridge according to claim 6, wherein two groups of butt-joint rotating shafts (19) are sleeved between the combined cutting sleeve (16) and the inner sleeve ring (17), and the combined cutting sleeve (16) and the inner sleeve ring (17) are movably connected through the butt-joint rotating shafts (19).
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| CN114855657A (en) * | 2022-06-14 | 2022-08-05 | 保利长大工程有限公司 | Method for quickly dismantling municipal overpass |
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