CN105735112A - Bolt connection-based rapid assembling precast rectangular concrete filled steel tube bridge pier - Google Patents
Bolt connection-based rapid assembling precast rectangular concrete filled steel tube bridge pier Download PDFInfo
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- CN105735112A CN105735112A CN201610231802.2A CN201610231802A CN105735112A CN 105735112 A CN105735112 A CN 105735112A CN 201610231802 A CN201610231802 A CN 201610231802A CN 105735112 A CN105735112 A CN 105735112A
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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
- E01D19/00—Structural or constructional details of bridges
- E01D19/02—Piers; Abutments ; Protecting same against drifting ice
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D21/00—Methods or apparatus specially adapted for erecting or assembling bridges
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D2101/00—Material constitution of bridges
- E01D2101/20—Concrete, stone or stone-like material
- E01D2101/24—Concrete
- E01D2101/26—Concrete reinforced
- E01D2101/268—Composite concrete-metal
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Abstract
The invention discloses a bolt connection-based rapid assembling precast rectangular concrete filled steel tube bridge pier, and belongs to the field of bridge engineering. The bolt connection-based rapid assembling precast rectangular concrete filled steel tube bridge pier comprises precast rectangular concrete filled steel tube sections, pre-buried nodes, connecting plates, high-strength bolts and core penetration bolts; each precast concrete filled steel tube section consists of a steel tube section, concrete, reserved core penetration bolt hole channels, reserved bolt holes, precast screw caps, a sealing material and PVC (Polyvinyl Chloride) tubes; each pre-buried node consists of a precast rectangular concrete filled steel tube section, a foot plate, outside-stiffened ribs and anchor bolts; bolt holes and core penetration bolt holes are formed in each connecting plate according to bolt design positions; adjacent precast concrete filled steel tube sections are connected with each other by the connecting plates, the high-strength bolts and the core penetration bolts. The bolt connection-based rapid assembling precast rectangular concrete filled steel tube bridge pier has the characteristics of high anti-pressure and anti-shear bearing capacity, excellent anti-seismic property, easiness in factory production, convenience and rapidness in site operation, energy conservation, environmental friendliness and the like.
Description
Technical field
The invention belongs to science of bridge building field, be specifically related to Precast Concrete Segmental Bridges concrete pier of steel tube.
Background technology
One of significant challenge that current city bridge engineering construction is faced with is exactly that owner and resident are except requiring bridge structure safe and be durable, it is also desirable to the various noises etc. reducing the interference to surrounding traffic in bridge structure building course as far as possible, shortening the traffic jam time owing to bridge construction causes, reduce engineering transportation vehicle and produce in construction.These requirements have promoted the development of science of bridge building industrialization technology, wherein prefabrication and assembly construction technology just under this background produced by, precast segment assembling technique be build fast, efficient, safe, durable Urban Bridge engineering provide favourable solution.Additionally, in the long-span bridge engineering of gorge over strait, the restriction of the factors such as limited offshore construction platform space, complicated marine climate condition, strict environmental conservation condition, also promote the application in long-span bridge engineering over strait of the section assembling construction technology.
Precast Concrete Segmental Bridges technology is about research and to be applied in China relatively fewer, Precast Concrete Segmental Bridges technology in existing engineering is mainly used in bridge superstructure, girder is divided into some precast segments or whole opening prefabricated, assembled by lifting machine full span erection or boom segments.The Precast Concrete Segmental Bridges technology of bridge substructure is also in the preliminary study stage, and only part sea-crossing engineering have employed the precast assembly technology that whole pier prefabrication cast-in-place wet joint connects, and Urban Bridge substructure is also provided without Precast Concrete Segmental Bridges technology substantially.China is in mass transportation infrastructure construction period, Urban Bridge, Oversea bridge building course in, bridge fast construction technology is increasingly subject to advantages such as its component crudy height, efficiency of construction height, environmental friendliness building owner and attention.The important development direction that bridge structure prefabrication and assembly construction technology will be following bridge engineering construction.
In recent years, steel core concrete column obtains more application in building structure, especially for the tall and super tall R.C. buidings that carrying demand is bigger, being more widely applied of concrete filled steel tube.Concrete filled steel tubular member makes full use of the advantage of steel tension and concrete anti-compression, not only has good bearing capacity, has extraordinary anti-seismic performance, therefore suffer from the favor of engineering design and builder under horizontal reciprocating effect.But the concrete filled steel tubular member of major applications is also all based on cast in situs concrete filled steel tubular member at present.Steel core concrete column is proposed multiple type of attachment with beam connecting node structure structure by Chinese scholars.But at present concrete filled steel tube research and development in bridge pier and application are also considerably less.
Summary of the invention
The present invention makes full use of the good vertical bearing capacity of concrete filled steel tube and anti-seismic performance, it is combined with precast assembly technology, avoid simultaneously or delay the out-of-plane buckling of concrete filled steel tube end steel plate, there is provided a kind of based on bolted quick-assembling prefabricated rectangle concrete pier of steel tube, meet the precast segment assembly structure of bridge industrialization building technology Bridge key member, it is prone to carry out the mechanized construction of prefabrication and assembly construction bridge pier, reduces Site Welding and prestressed stretch-draw workload.
Technical scheme is as follows:
The present invention relates to a kind of based on bolted quick-assembling prefabricated rectangle concrete pier of steel tube, belong to science of bridge building field.It includes prefabricated rectangle steel pipe concrete segment (3), pre-buried node (6), cushion cap (5).It is provided with pre-buried node (6) to be located between cushion cap (5) and prefabricated rectangle steel pipe concrete segment (3).
Between adjacent prefabricated rectangle steel pipe concrete segment (3) and between prefabricated rectangle steel pipe concrete segment (3) and pre-buried node (6), it is arranged on the joining place of adjacent steel pipe sections (11) with connecting plate (4), is attached fixing by connecting plate (4), steel pipe sections (11) by high-strength bolt (7) and punching bolt；
Prefabricated rectangle steel pipe concrete segment (3) is made up of steel pipe sections (11), concrete (12), prefabricated nut (13), encapsulant (14) and pvc pipe (15), pvc pipe (15) is laid at the reserved punching bolt hole place of steel pipe sections (11), the prefabricated nut of prepared screw-bolt hole place spot welding (13), one end encapsulant (14) that prefabricated nut (13) does not weld seals, and concrete (12) is cast in steel pipe sections (11)；Pre-buried node (6) is made up of steel pipe sections (11), concrete (12), prefabricated nut (13), encapsulant (14) and pvc pipe (15), sole (10), adding rib (9) and crab-bolt (2), sole (10), adding rib (9) and prefabricated nut (13) weld with steel pipe sections (11), crab-bolt (2) is fixed on sole (10), laying pvc pipe at the reserved punching bolt duct place of steel pipe sections (11), concrete (12) is cast in steel pipe sections (11)；Connecting plate (4) arranges High-strength bolt hole and punching bolt hole by design bolt position.
Described pre-buried node (6) place, prefabricated rectangle steel pipe concrete segment (3) is in its exposed junction prepared screw-bolt hole and punching duct, in order to imbed end welding sole (10) and adding rib (9), sole (10) connects crab-bolt (2).The degree of depth of embedded section embedment cushion cap (5) is not less than 1.5 times of concrete-filled rectangular steel tube bond length, and exposed junction length is the 1/2 of splice plate (4) length.Pre-buried node (6) is mainly used in precast assembly pier stud and is connected with cushion cap (5), and crab-bolt (2) is used for improving resistance to plucking and the shear resistance of pre-buried node (6).
By Pier Design side bearing capacity and single bolt, the design number of described high-strength bolt (7) and punching bolt (8) allows that the ratio of antiskid bearing capacity determines.Punching bolt (8) and high-strength bolt (7) adopt interlacing to be staggeredly arranged principle, the punching bolt (8) of two adjacent surfaces is not in same level position, it is prevented that punching bolt (8) intersects in prefabricated rectangle steel pipe concrete segment (3).Bolt hole on connecting plate (4) is corresponding with the prepared screw-bolt hole on prefabricated rectangle steel pipe concrete segment (3) and punching bolt hole position with punching bolt hole.
Described preset nut (13) and the steel pipe inner wall spot welding of prefabricated rectangle steel pipe concrete segment (3) prepared screw-bolt hole place are fixed, one end encapsulant (14) not welded carry out pulp-water when sealing prevents casting concrete (12) overflow and pier stud external moisture to enter prefabricated rectangle steel pipe concrete segment (3) internal.
Described connecting plate (4) and steel pipe sections (11) are closely sturdy to ensure that high-strength bolt (7) and punching bolt (8) are in artesian condition and tension under lateral forces, it is to avoid be in by scissor state.
The internal diameter of described pvc pipe (15) should 1-2mm bigger than punching bolt (8) diameter, when facilitating the installation of punching bolt also for concreting, the deformation of pvc pipe (15) leaves certain space.
The invention have the advantages that relative to cast-in-place pier stud, precast segment steel-pipe assembly performance of concrete column confined has good resistance to compression, shear resistant capacity and anti-seismic performance, can give full play to the material property of steel tension and concrete anti-compression.Prefabricated subsection pier stud directly adopts steel pipe as concrete-pouring template in prefabrication process, saves prefabricated cost, improves production efficiency.Precast Concrete Segmental Bridges pier stud installation is convenient, it is not necessary to on-the-spot stretch-draw prestressing force, welding or grouting, reduces in-site installation quantities.For meizoseismal area bridge fast construction, reducing unfavorable society, the economic impacts such as the traffic delay owing to bridge construction causes, environmental pollution provides effective and rapid solution, and after shaking for later stage bridge, impaired reparation provides feasible program simultaneously.
Accompanying drawing explanation
Fig. 1 precast assembly concrete-filled rectangular steel tube bridge pier structure figure.
Fig. 2 .1 Prefabricated concrete-filled steel tube segmental construct figure and horizontal sectional drawing thereof.
Fig. 2 .2 is Prefabricated concrete-filled steel tube sections A-A profile.
Fig. 3 .1 is pre-buried joint structure figure.
The pre-buried node B-B profile of Fig. 3 .2.
Fig. 4 connecting plate two adjacent surfaces structural map.
Fig. 5 precast assembly concrete-filled rectangular steel tube bridge pier assembly flow chart.
In figure: 1 bent cap；2 crab-bolts；3 Prefabricated concrete-filled steel tube sections；4 connecting plates；5 cushion caps；6 pre-buried nodes；7 high-strength bolts；8 punching bolts；9 adding ribs；10 soles；11 steel pipe sections；12 concrete；13 preset nuts；14 encapsulants；15 pvc pipes.
Detailed description of the invention
Below in conjunction with accompanying drawing 2.1-accompanying drawing 4, the specific embodiment of the present invention is further described.
Step 1: processing Prefabricated concrete-filled steel tube sections (3), connecting plate (4), pre-buried node (6), specifically includes following steps:
1) Prefabricated concrete-filled steel tube sections (3), make Prefabricated concrete-filled steel tube sections (3) in factory, and sheet material is welded into rectangular steel pipe, and its weld seam should adopt groove melt-through weld.Steel pipe processes prepared screw-bolt hole, punching bolt hole, after being alignd with prepared screw-bolt hole axle center by preset nut (14), spot welding is fixed, nut does not adopt encapsulant (14) to seal with one end of steel pipe inner wall spot welding, reserved punching spiro keyhole position installs pvc pipe (15), punching bolt (8) through pvc pipe (15) and is tightened interim fixing, casting concrete (12) vibrates maintenance, and punching bolt (8) can prevent the movement of pvc pipe (15) in concreting and maintenance processes and the deformation of steel pipe sections (11).
2) make connecting plate (4), make connecting plate (4) in factory, select by gauge and cuts sheet material, at the reserved High-strength bolt hole of sheet material relevant position processing and punching bolt hole.
3) pre-buried node (6) is made, pre-buried node (6) is made in factory, prefabricated rectangle steel pipe concrete segment (3) step is with 1) in one end welding sole (10) without bolt hole of prefabricated steel pipe concrete segment and adding rib (9), sole (10) processing bolt hole connection crab-bolt (2).
4) concrete bearing platform (5) and bent cap (1) construction, casting concrete cushion cap (5) and bent cap (1) at the scene, and two pre-buried nodes (6) buried foundation cushion cap (5) and bent cap (1) respectively are built.
Step 2: it is assembled that place built by prefabricated subsection bridge pier, as it is shown in figure 5, specifically include following steps:
1) concrete bearing platform (5) installing pre-buried node (6) to design attitude and is fixed.At the upper interim fixing punching bolt (8) of pre-buried node (6) and prefabricated rectangle steel pipe concrete segment (3) during prefabrication of dismantling.
2) by the prepared screw-bolt hole on connecting plate (4) lower end prepared screw-bolt hole and pre-buried node (6) top to it, installing for the fixing high-strength bolt (7) connecting connecting plate (4) and pre-buried node (6) and punching bolt (8), fixing adjacent two connecting plates (4) are to installing its location of prefabricated rectangle steel pipe concrete segment (3) adjacent on pre-buried node (6) and spacing effect.
3) with lifting machine, prefabricated rectangle steel pipe concrete segment (3) is lifted to corresponding design attitude, install and remain other two pieces of connecting plates (4), tighten high-strength bolt (7) and punching bolt (8) at the reserved screwhole position of correspondence.
4) step 2 is repeated) and step 3) carry out connecting plate (4) installation of next node and the installation of Prefabricated concrete-filled steel tube sections (3), until all Prefabricated concrete-filled steel tube sections (3) complete to install.
5) step 2 is finally repeated), the node connecting plate (4) of the prefabricated rectangle steel pipe concrete segment (3) that prefabricated bent cap (1) is adjacent is installed, tightens high-strength bolt corresponding to prepared screw-bolt hole (7) and punching bolt (8).
Step 1) described in processing prepared screw-bolt hole, after corresponding steel pipe sections (11), connecting plate (4) should being fixed according to the position after installation forming, unified punching, ensure that inside and outside prepared screw-bolt hole is perfectly aligned, and all need burr inside and outside polishing prepared screw-bolt hole after punching, it is to avoid installing engineering occurs because burr causes the phenomenon that gets stuck.
Claims (6)
1. based on bolted quick-assembling prefabricated rectangle concrete pier of steel tube, it is characterised in that: this bridge pier includes prefabricated rectangle steel pipe concrete segment (3), pre-buried node (6), cushion cap (5)；It is provided with pre-buried node (6) to be located between cushion cap (5) and prefabricated rectangle steel pipe concrete segment (3)；
Between adjacent prefabricated rectangle steel pipe concrete segment (3) and between prefabricated rectangle steel pipe concrete segment (3) and pre-buried node (6), it is arranged on the joining place of adjacent steel pipe sections (11) with connecting plate (4), is attached fixing by connecting plate (4), steel pipe sections (11) by high-strength bolt (7) and punching bolt；
Prefabricated rectangle steel pipe concrete segment (3) is made up of steel pipe sections (11), concrete (12), prefabricated nut (13), encapsulant (14) and pvc pipe (15), pvc pipe (15) is laid at the reserved punching bolt hole place of steel pipe sections (11), the prefabricated nut of prepared screw-bolt hole place spot welding (13), one end encapsulant (14) that prefabricated nut (13) does not weld seals, and concrete (12) is cast in steel pipe sections (11)；Pre-buried node (6) is made up of steel pipe sections (11), concrete (12), prefabricated nut (13), encapsulant (14) and pvc pipe (15), sole (10), adding rib (9) and crab-bolt (2), sole (10), adding rib (9) and prefabricated nut (13) weld with steel pipe sections (11), crab-bolt (2) is fixed on sole (10), laying pvc pipe at the reserved punching bolt duct place of steel pipe sections (11), concrete (12) is cast in steel pipe sections (11)；Connecting plate (4) arranges High-strength bolt hole and punching bolt hole by design bolt position；
Described pre-buried node (6) place, prefabricated rectangle steel pipe concrete segment (3) is in its exposed junction prepared screw-bolt hole and punching duct, in order to imbed end welding sole (10) and adding rib (9), sole (10) connects crab-bolt (2)；The degree of depth of embedded section embedment cushion cap (5) is not less than 1.5 times of concrete-filled rectangular steel tube bond length, and exposed junction length is the 1/2 of splice plate (4) length；Pre-buried node (6) is mainly used in precast assembly pier stud and is connected with cushion cap (5), and crab-bolt (2) is used for improving resistance to plucking and the shear resistance of pre-buried node (6).
2. according to claim 1 based on bolted quick-assembling prefabricated rectangle concrete pier of steel tube, it is characterised in that: by Pier Design side bearing capacity and single bolt, the design number of described high-strength bolt (7) and punching bolt (8) allows that the ratio of antiskid bearing capacity determines；Punching bolt (8) and high-strength bolt (7) adopt interlacing to be staggeredly arranged principle, the punching bolt (8) of two adjacent surfaces is not in same level position, it is prevented that punching bolt (8) intersects in prefabricated rectangle steel pipe concrete segment (3)；Bolt hole on connecting plate (4) is corresponding with the prepared screw-bolt hole on prefabricated rectangle steel pipe concrete segment (3) and punching bolt hole position with punching bolt hole.
3. according to claim 1 based on bolted quick-assembling prefabricated rectangle concrete pier of steel tube, it is characterized in that: described preset nut (13) and the steel pipe inner wall spot welding of prefabricated rectangle steel pipe concrete segment (3) prepared screw-bolt hole place are fixed, one end encapsulant (14) not welded carry out pulp-water when sealing prevents casting concrete (12) overflow and pier stud external moisture to enter prefabricated rectangle steel pipe concrete segment (3) internal.
4. according to claim 1 based on bolted quick-assembling prefabricated rectangle concrete pier of steel tube, it is characterized in that: described connecting plate (4) and steel pipe sections (11) are closely sturdy to ensure that high-strength bolt (7) and punching bolt (8) are in artesian condition and tension under lateral forces, it is to avoid be in by scissor state.
5. according to claim 1 based on bolted quick-assembling prefabricated rectangle concrete pier of steel tube, it is characterized in that: the internal diameter of described pvc pipe (15) should 1-2mm bigger than punching bolt (8) diameter, when facilitating the installation of punching bolt also for concreting, the deformation of pvc pipe (15) leaves certain space.
6. according to claim 1 based on bolted quick-assembling prefabricated rectangle concrete pier of steel tube, it is characterized in that: the implementation of this bridge pier is as follows, step 1: processing Prefabricated concrete-filled steel tube sections (3), connecting plate (4), pre-buried node (6), specifically includes following steps:
1) Prefabricated concrete-filled steel tube sections (3), make Prefabricated concrete-filled steel tube sections (3) in factory, and sheet material is welded into rectangular steel pipe, and its weld seam should adopt groove melt-through weld；Steel pipe processes prepared screw-bolt hole, punching bolt hole, after being alignd with prepared screw-bolt hole axle center by preset nut (14), spot welding is fixed, nut does not adopt encapsulant (14) to seal with one end of steel pipe inner wall spot welding, reserved punching spiro keyhole position installs pvc pipe (15), punching bolt (8) through pvc pipe (15) and is tightened interim fixing, casting concrete (12) vibrates maintenance, and punching bolt (8) can prevent the movement of pvc pipe (15) in concreting and maintenance processes and the deformation of steel pipe sections (11)；
2) make connecting plate (4), make connecting plate (4) in factory, select by gauge and cuts sheet material, at the reserved High-strength bolt hole of sheet material relevant position processing and punching bolt hole；
3) pre-buried node (6) is made, pre-buried node (6) is made in factory, prefabricated rectangle steel pipe concrete segment (3) step is with 1) in one end welding sole (10) without bolt hole of prefabricated steel pipe concrete segment and adding rib (9), sole (10) processing bolt hole connection crab-bolt (2)；
4) concrete bearing platform (5) and bent cap (1) construction, casting concrete cushion cap (5) and bent cap (1) at the scene, and two pre-buried nodes (6) buried foundation cushion cap (5) and bent cap (1) respectively are built；
Step 2: it is assembled that place built by prefabricated subsection bridge pier, specifically includes following steps:
1) concrete bearing platform (5) installing pre-buried node (6) to design attitude and is fixed；At the upper interim fixing punching bolt (8) of pre-buried node (6) and prefabricated rectangle steel pipe concrete segment (3) during prefabrication of dismantling；
2) by the prepared screw-bolt hole on connecting plate (4) lower end prepared screw-bolt hole and pre-buried node (6) top to it, installing for the fixing high-strength bolt (7) connecting connecting plate (4) and pre-buried node (6) and punching bolt (8), fixing adjacent two connecting plates (4) are to installing its location of prefabricated rectangle steel pipe concrete segment (3) adjacent on pre-buried node (6) and spacing effect；
3) with lifting machine, prefabricated rectangle steel pipe concrete segment (3) is lifted to corresponding design attitude, install and remain other two pieces of connecting plates (4), tighten high-strength bolt (7) and punching bolt (8) at the reserved screwhole position of correspondence；
4) step 2 is repeated) and step 3) carry out connecting plate (4) installation of next node and the installation of Prefabricated concrete-filled steel tube sections (3), until all Prefabricated concrete-filled steel tube sections (3) complete to install；
5) step 2 is finally repeated), the node connecting plate (4) of the prefabricated rectangle steel pipe concrete segment (3) that prefabricated bent cap (1) is adjacent is installed, tightens high-strength bolt corresponding to prepared screw-bolt hole (7) and punching bolt (8)；
Step 1) described in processing prepared screw-bolt hole, after corresponding steel pipe sections (11), connecting plate (4) should being fixed according to the position after installation forming, unified punching, ensure that inside and outside prepared screw-bolt hole is perfectly aligned, and all need burr inside and outside polishing prepared screw-bolt hole after punching, it is to avoid installing engineering occurs because burr causes the phenomenon that gets stuck.
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