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10625results about "Bridge erection/assembly" patented technology

Self-resetting pier column structural system with built-in energy dissipation assembly and implementing method for self-resetting piper column structural system

InactiveCN102409606ASufficient ductility and energy dissipation capacityStrong enoughBridge structural detailsBridge erection/assemblyBridge engineeringResidual deformation
The invention discloses a self-resetting pier column structural system with a built-in energy dissipation assembly and an implementing method for the self-resetting pier column structural system, and belongs to the field of bridge engineering. The self-resetting pier column structural system consists of a pier column, a bridge abutment, energy dissipation steel bars, non-adhesion prestressed steel bars with an elastic resetting function and an embedded part; in the novel pier column structural system capable of effectively reducing residual deformation and ensuring sufficient energy dissipation, a pier is connected with the bridge abutment through the energy dissipation steel bars and the non-adhesion prestressed steel bars. Compared with the conventional pier column node, the self-resetting pier column structural system has the advantages that: the non-adhesion prestressed steel bars are positioned in the axle center of the pier column, a self-resetting restoring force can be generated, and the problem that the conventional pier has large residual deformation under the action of an earthquake load and cannot serve people any longer can be solved well; the self-resetting pier column structural system is flexible in design and definite in structural stress; the pier is ensured to have sufficient strength and rigidity; and the self-resetting pier column structural system can be implemented by a prefabricating or on-site pouring method, is easy and convenient to construct, and is an advanced and practical novel pier column system.
Owner:TSINGHUA UNIV

Reinforced concrete arch bridge construction method

The invention discloses a reinforced concrete arch bridge construction method, which comprises the following steps of: 1, constructing a pile foundation, a pile cap, a bridge abutment body side wall and a bridge pier body; 2, erecting arch ring supports from the fourth hole to the eighth hole and from the thirteenth hole to the seventeenth hole on two sides of an arch bridge, arranging a locking system, and finally pouring concrete to arch rings of the eight holes; 3, detaching the arch ring supports in the step 2, erecting arch ring supports from the zero hole to the fourth hole and from theseventeenth hole to the twenty-first hole on the bridge abutment side, arranging a locking system and finally pouring concrete to arch rings of the eight holes; and 4, detaching the arch ring supports erected in the step 3, erecting arch ring supports from the eighth hole to the thirteenth hole in the span, arranging a locking system, pouring concrete to arch rings of the five holes, and folding the whole bridge. Main bodies of the arch ring supports have arch truss structures, a characteristic that steel bars are tensioned is utilized, the structures are firm, the middles of the structures are not required to be supported, materials are saved, the arch ring supports are convenient to detach, and constriction time is saved.
Owner:浙江大东吴集团建设有限公司

Non-stand construction method for large bridge arch rib

The invention relates to a large-scale bridge (steel pipe concrete arch bridge) arch rib non-support construction method, which is characterized in that: the fastening tower process and hanging tower process are combined; the fastening anchor process and hanging anchor process are combined; rubber support is applied in the tower articulation (steel structure); steel twisted wire is used as the fastening-hanging tower -anti-wind rope (tower pressing cable); centralized working surfaces and steel twisted wires are adopted in the fastening-hanging process; steel pipe support are used in tower; and less fastening cables are used in the fastening-hanging process. The construction method reduces arch rib assembling places and mounting supports, accelerates the construction progress; the stayed-fastening cable construction uses the masts type tower hung by the cable to mount arch rib, reduces construction of a group of tower and anchor; by adopting less cable construction method, the invention reduces the anchor box segment positions on the tower and reduces anchor cable quantity; and by adopting one-time forming, monitoring and measuring method, the invention simplifies the arch rib mounting construction process and the cable adjusting construction engineering, increases production efficiency, accelerates construction progress and ensures arch rib mounting quality.
Owner:GUANGDONG PROVINCIAL CHANGDA HIGHWAY ENG

A kind of steel truss bridge and its manufacturing method

The invention discloses a steel truss bridge and a method for fabricating the same. The steel truss bridge comprises a steel box girder bridge deck, a main truss composed of two steel trusses, and a steel portal frame. The steel truss comprises an upper chord member, a lower chord member, and a web member which is connected with the upper chord member and the lower chord member through bolts. A sidewalk bracket is arranged outside each steel truss. The lower chord member is connected to the steel box girder bridge deck and the sidewalk bracket, respectively. Besides, the two steel trusses are connected through the steel portal frame. During fabrication, all the sections of the steel trusses, the steel portal frame and the bridge deck are independently fabricated, respectively; all the sections of the upper and lower chord members of the steel truss are pre-assembled circularly with the corresponding web members, and all the sections of the steel box girder bridge deck are pre-assembled with the corresponding lower chord members by an orthotectonic method, respectively; and the steel portal frame is pre-assembled with the steel trusses. The steel truss bridge disclosed by the invention completely meets the design requirements so that the stability and safety factor of the bridge can be enhanced; and by employing the fabricating method, positioning is accurate so that the risks during the field assembling can be reduced; and the construction period can be shortened.
Owner:JIANGSU JINGHU HEAVY IND

Multipoint synchronous push construction method for porous large-span continuous steel truss girder

The invention discloses a multipoint synchronous push construction method for a porous large-span continuous steel truss girder, which comprises the following steps of: (1) assembling a steel truss girder assembling platform and a push slideway in a shoreside bridge pier position; (2) assembling a section of steel truss girder and a guide girder on the steel truss girder assembling platform; (3) installing a vertical jack for carrying out support conversion on the steel truss girder and then installing a continuous push jack, a steel strand and an electrohydraulic integrated control system; (4) operating the electrohydraulic integrated control system for carrying out push operation on the steel truss girder; and (5) after the push operation of the section of steel truss girder is finished, continuously assembling the steel truss girder on the steel truss girder assembling platform, carrying out next push operation, repeating the step for circulating operation and finishing the push construction of the porous large-span steel truss girder. The invention has the advantages of short construction period, safe construction, quality guarantee, low cost, and the like, realizes the push operation of the large-span steel truss girder, saves the construction cost, and reduces the pollution to a river channel.
Owner:1ST ENG OF CHINA ZHONGTIE MAJORBRIDGE GROUP +1

Damage-controllable self-resetting section prefabricated assembled steel pipe concrete bridge pier and manufacturing method thereof

The invention discloses a damage-controllable self-resetting section prefabricated assembled steel pipe concrete bridge pier and a manufacturing method thereof, and belongs to the field of bridge engineering. An exposed node connecting piece consists of a foot plate, anchor bolts, end connecting plates and buckling restraining sleeves. A connecting plate is mounted between prefabricated steel pipe concrete sections through high-strength bolts; the exposed node connecting piece is connected with each of a cover beam and a bearing platform by utilizing the anchor bolts, and is connected with a prefabricated steel pipe concrete section through the high-strength bolts relying on the end connecting plates. A pre-stressed tendon penetrates through a section prefabricated steel pipe concrete pier; the two ends of the pre-stressed tendon are respectively anchored to the interiors of the bearing platform and the cover beam by using anchorage devices. The energy consumption-controllable self-resetting section prefabricated assembled steel pipe concrete bridge pier disclosed by the invention has the characteristics of small post-seismic residual displacement, high energy consumption capacity, controllable energy consumption, high assembling degree, convenience and quickness in construction process, greenness, high efficiency, energy conservation, environment friendliness, easiness in factory production, convenience and quickness in construction, and the like; the construction period of the pier can be remarkably shortened.
Owner:BEIJING UNIV OF TECH

Pier column prefabrication splicing building technology

The invention provides a pier column pre-casting splicing construction technique working method, which is characterized in that: on a land construction site, a pier body of the whole bridge pier is pre-cast by segments, pier body end heads of each segment are buried with outwardly-extending reinforcement bars, and all segments are transferred to the pier construction site for pier assembly. The working method has the advantages of having light bridge piers, reducing the number of projects, saving manpower, lowering construction costs, having good construction quality and quick construction, solving the problems of reliability, safety, anti-crack property and durability between pier columns pre-cast by segments and between the pier columns and a bearing platform connecting structure, reducing the influence of natural conditions on construction period, reducing construction cost and construction risk, reducing the number of cast-in-situ concrete and equipment such as a hoisting machine and the like and effectively saving cost. Due to the advantages of the splicing type bridge pier and the development of various high strength concrete materials in recent years, the working method is applied to water bridges with large scale, multiple bridge spans, adverse natural environment, and difficult construction due to the influence of wind, wave, current, rain and fog.
Owner:NO 1 ENG COMPANY CO LTD OF CCCC FIRST HARBOR ENG COMPANY +1

Construction method of marine self-floating type steel soleplate single-wall suspension box cofferdam and single-wall suspension box cofferdam

The invention discloses a construction method of a marine self-floating type steel soleplate single-wall suspension box cofferdam and a single-wall suspension box cofferdam, wherein the construction method comprises the following steps of: firstly installing a soleplate suspended shoulder pole girder and lowered guiding device of the cofferdam, then installing a steel soleplate, a lateral plate and an inner support, then carrying out the construction of lowering, fixing and bottom sealing by concrete of the cofferdam and finally carrying out the construction of a bearing platform. The cofferdam can be repeatedly used after being dismantled. The marine self-floating type steel soleplate single-wall suspension box cofferdam comprises the steel soleplate, the lateral plate, the inner support and the soleplate suspended shoulder pole girder and lowered guiding device. The steel soleplate of the invention is of a self-floating type assembled structure, an inner inclined strut of the cofferdam is utilized as a distributing girder suspended on the cofferdam when in the construction of bottom sealing by concrete, the lateral plate adopts a massive integral design, and meanwhile, an inner guide girder and the lateral plate are combined into a whole, thereby improving the integral rigidity of the lateral plate and also reducing the assembled working procedures of the cofferdam. The invention has the advantages of effective acceleration of construction schedule, simple and convenient construction operation, high repeated use ratio, safety, reliability and less cost investment.
Owner:THE 5TH ENG MBEC

Construction method for chamber type bridge maintaining external pre-stress

The invention discloses an external prestressing construction method for box bridge maintenance, which is characterized in that: 1). The position of an anchor block, a redirector and a shock absorber are decided according to external cable arranging mode for external prestressing; 2). The installation of the anchor block: 2.1). concrete base surface processing; 2.2). hole drilling, hole cleaning and reinforcing bar planting; 2.3). the installation of steel-bonded steel plate: the anchor block comprises a steel-bonded steel plate, a connecting plate and a stiffening plate; all anchor bolts are penetrated through a corresponding fixing hole on the steel-bonded steel plate; 2.4). the installation of other steel plates for the anchor block; the connecting plate is welded with the steel-bonded steel plate, the stiffening plate is welded with the steel-bonded steel plate and is provided with a through hole for external cable; 2.5). glue pouring for the steel-bonded steel plate: glue pouring is made between the steel-bonded steel plate and the concrete base surface for the anchor block; 3). Horizontal partition wall perforation; 4). The installation of a redirecting support and a damping support; 5). The installation of the redirector; 6). Penetrating and tension of prestressing steel strand; 7). The installation of the shock absorber. The invention has the advantages of convenient construction, flexibility and stronger reliability.
Owner:CHINA FIRST METALLURGICAL GROUP

Segment-assembling simply supported box girder movable falsework construction method

The invention discloses a segment assembled simple box girder movable trestle construction method. The required construction simple box girder has single hole or multiple holes, and is assembled by a plurality of longitudinal (i.e. along bridge direction) segment box grinders; the method comprises the following steps: prefabricating all the segment box girders for assembling the simple box girder in concentration; assembling and erecting the first hole grinder, which comprises the steps of: assembling and erecting the trestle (i.e. assembling platform), hanging the segments on to the assembling platform according to the assembling sequence and adjusting the arch degree, line style and position accurately, constructing the segments on the assembling platform by segment assembling construction technology until complete the whole hole grinder construction, and dismounting the trestle and moving to the next hole grinder; and performing the subsequent hole grinders in order according to the construction steps of the first hole grinder. the invention achieves the advantages of simple steps, low construction difficulty, short construction cycle and low onetime fund investment; can solves the practical problems existing in the segment assembling construction process of current large-span bridge fabrication machine.
Owner:CHINA RAILWAY FIRST GRP CO LTD

Single plate force-bearing reinforcing method of hollow slab bridge

The invention relates to a single plate force-bearing reinforcing method of a hollow slab bridge. The single plate force-bearing reinforcing method includes that the original bridge deck pavement is shoveled, hinge joint concrete is removed, defects and cracks of the original hollow slab bridge beam body are processed, strip-shaped steel plates are transversely pasted on the upper surface and the lower surface of the hollow slab bridge in the longitudinal bridge direction at certain intervals, split screws penetrate through drilled holes at the hinge joint position, a counter-force frame is arranged, a wedge-shaped block is embedded between the counter-force frame and the steel plates, and the steel plates are pressurized and pasted in sealing mode and then are positioned and fixed; the counter-force frame is demounted after sticky steel glue is cured; cavities in beam joints are subjected to pressure grouting, shear reinforcements are placed into the top surface of a hollow slab, a reinforcement mesh is reconstructed, and the bridge deck reinforcement mesh and the implanted reinforcements are connected in binding or point welding mode to form a whole body; steel fiber reinforced concrete is poured and waterproof coatings are sprayed; and bituminous concrete is paved. The single plate force-bearing reinforcing method improves transverse load distribution, steel plate pasting reliability and bridge integral force-bearing performance on the premise of preventing hollow slab beam body damage, not changing a structural force-bearing system and not interrupting the traffic.
Owner:CHINA MAJOR BRIDGE ENERGINEERING

Construction method for integrally sliding large-span steel pipe arch of curved bridge

The invention relates to a construction method for integrally sliding a large-span steel pipe arch of a curved bridge, belonging to the field of bridge engineering construction. The method comprises the following steps: firstly, carrying out on-site splicing and welding on the manufacturing and installing sections of a steel pipe arch to form a large hoisting section; then installing a temporary arch-splicing support on a bridge-site longitudinal splicing site position, arranging arch ribs on the temporary arch-splicing support, and adopting an arch springing restraint device to preload arch springings after finishing splicing the steel pipe arch, thus enabling the steel pipe arch to form a stressed entirety; and finally, dismantling the temporary arch-splicing support, and adopting a pushing power system to realize integrally sliding the whole steel pipe arch into a proper position. The construction method of the invention has the advantages of small site occupation, integral hoisting of large sections, less hoisting subsection and less arch-splicing support amount, thus the construction cost is economical, the high-altitude welding quantity is less, the welding quality is ensured, the arch axis linetype control is easy, the steel pipe arch splicing and a concrete beam can be simultaneously constructed, arch splicing is carried out on an ectopic bridge site, the underbridge navigation is not influenced, the construction is safe and the construction progress can be quickened.
Owner:CHINA FIRST HIGHWAY ENG +1

Concrete box girder bridge widening and reinforced structure and construction method thereof

The invention discloses a widening and reinforcing structure for a concrete box girder bridge and a method for constructing the same. The widening and reinforcing structure comprises a new box girder I and a new box girder II which are parallel with the original box girder bridge and are positioned at two sides of the original box girder bridge; and the box girder of the new box girder I and the box girder of the new box girder II are in rigid connection with box girder flanges of the original box girder bridge. The new box girders share part of the load of the original box girder so that the internal force and the deformation (or the stress of a control point) of a controlled cross section of the original box girder bridge are reduced by about 20 percent; and the generation and the development of cracks on a crest slab, a bottom plate and a web plate of the original box girder bridge can be effectively inhibited. The widening and reinforcing structure is simple, has slight damage to the original box girder bridge, and does not increase obvious structure deadweight substantially. The method for widening and reinforcing constructions is simple and convenient; the reinforced concrete box girder bridge has a reliable structure; the construction period is relatively short; the impact on the road traffic is relatively small; and the damage to the natural environment and the bad social impact caused by the demolition of an old bridge are avoided, thus the method has good comprehensive technical, economic and social benefits.
Owner:CHONGQING JIAOTONG UNIVERSITY

Large-span steel truss arch construction method

The invention relates to a large-span steel truss arch construction method. The invention is characterized in that the method comprises the following steps: 1) based on the alignment design of an main arch ring of a reinforced concrete arch bridge, if a main arch span of the reinforced concrete arch bridge is not more than 100m, an arc line is adopted as the line shape of a arch axis line of the steel truss arch; if the main arch span of the reinforced concrete arch bridge is more than 100m, a catenary line or a parabola curve is adopted as the line shape of the arch axis line of the steel truss arch; big samples of a first unit truss segment and a second unit truss segment are produced for steel truss arch ribs on a sample platform according to the scale of 1:1; 2) the inner side of a first main arch support is widened to form a first base of the steel truss arch, the inner side of a second main arch support is widened to form a second base of the steel truss arch; 3) the erection sequence of the unit truss segments is that: first arranging steel truss arch ribs on the upper course of a river, then arranging steel truss arch ribs in sequence to the lower course of the river; 4) the back arch elevation of the steel truss arch is adjusted to the level of the arch soffit elevation of the main arc ring. The construction method is not limited by the terrain condition and site condition of bridge location and is simple and easy to install and remove.
Owner:CHINA FIRST METALLURGICAL GROUP

Walking type multipoint pushing construction method and walking type multipoint pushing construction system for steel box girder

ActiveCN102587291ASolve the shortcomings of conventional processesReduce stress valueBridge erection/assemblyHorizontal forceSteel box girder
The invention discloses a walking type multipoint pushing construction method for a steel box girder, which is an improved optimized scheme for improving the disadvantages of a pulling type pushing method. The optimized scheme comprises the steps of installing pushing devices at assembly platforms, temporary mounds, main mounds and other points, firstly jacking the steel box girder with a vertical jack to separate the steel box girder from a girder laying frame, then pushing the steel box girder for a stroke in the longitudinal direction by a pushing jack, lowering the steel box girder to the girder laying frame, retracting the pushing jack for a next stroke of pushing, and keeping the circulation of the work until the installation of the steel box girder is finished. The pushing construction method for the steel box girder provided by the invention adopts a multipoint walking type pushing system, which not only can avoid disadvantages in the process in prior arts, but also has the advantages that the horizontal force at the mound top is greatly reduced; the structure of the temporary mound is simplified; the damage to the steel box girder is small; the construction cost is low and the like.
Owner:THE FIRST ENG OF CCCC FOURTH HARBOR ENG

Polycarbonate (PC) composite bridge with corrugated steel webs and construction method for PC composite bridge

The invention discloses a polycarbonate (PC) composite bridge with corrugated steel webs and a construction method for the PC composite bridge. The PC composite bridge comprises a concrete top plate, a concrete bottom plate and two double-corrugated steel webs; the bottom surface of the concrete top plate and the concrete bottom plate are provided with upper and lower profiled steel sheets; each double-corrugated steel web comprises two layers of corrugated steel plates and a plurality of connecting pieces; concrete is filled between the two layers of corrugated steel plates; the connecting pieces are connected between the two layers of corrugated steel plates, so that the two corrugated steel plates work together and the aim of greatly improving bending rigidity and torsional rigidity is fulfilled; the upper ends of the double-corrugated steel webs are connected with steel top plates connected with the upper profiled steel plate; and the lower ends of the double-corrugated steel webs are connected with steel bottom plates connected with the lower profiled steel plate. The double-corrugated steel webs are integral, the bending rigidity and torsional rigidity are improved by more than 4 times, the stability is high during construction, and the application range of the bridge is widened; and the profiled steel plates are adopted, so that formwork supports for the concrete top plate and the concrete bottom plate are eliminated during construction, construction without formworks and with a few supports is realized, the cost is reduced and the construction period is shortened.
Owner:SHENZHEN UNIV +1

Corrugated steel webplate combined box girder floor system for cable-stayed bridge and construction method thereof

InactiveCN101864729AAvoid on-site molding processReduce wet work workloadCable-stayed bridgeBridge structural detailsCrack resistanceEngineering
The invention relates to a corrugated steel webplate combined box girder floor system for a cable-stayed bridge and a construction method thereof, and belongs to the technical field of bridge structures. The corrugated steel webplate combined box girder floor system comprises a precast concrete plank and a cast-in-place concrete seam, wherein the precast concrete plank is positioned on a steel box girder and is integrated with the steel box girder into a whole; the steel box girder is formed by welding a top flange steel plate, a corrugated steel webplate and a steel plate at the bottom of the box girder; a box girder baseplate stiffening rib and a diaphragm plate are welded in the steel box girder; the diaphragm plate comprises a top flange steel plate of the diaphragm plate and a steel webplate of the diaphragm plate; a toggle pin connecting piece is welded on the top flange steel plate and the top flange steel plate of the diaphragm plate; and a steel anchor pulling plate and a steel sleeve are welded on the top flange steel plate. The corrugated steel webplate combined box girder floor system simplifies the manufacturing process for the precast concrete plank, gives full play to the superior mechanical property of the corrugated steel webplate and the release action of the corrugated steel webplate on the creep effect of concrete shrinkage, improves the bearing capacity, stiffness and crack resistance of the structure, and improves the durability of the structure.
Owner:TSINGHUA UNIV
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