CN108999073A - A kind of cable-stayed bridge - Google Patents

A kind of cable-stayed bridge Download PDF

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Publication number
CN108999073A
CN108999073A CN201810919587.4A CN201810919587A CN108999073A CN 108999073 A CN108999073 A CN 108999073A CN 201810919587 A CN201810919587 A CN 201810919587A CN 108999073 A CN108999073 A CN 108999073A
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CN
China
Prior art keywords
cable
drag
line
sarasota
stayed bridge
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Withdrawn
Application number
CN201810919587.4A
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Chinese (zh)
Inventor
黄家旺
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Zhangjiagang Ou Micro Automation R & D Co Ltd
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Zhangjiagang Ou Micro Automation R & D Co Ltd
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Priority to CN201810919587.4A priority Critical patent/CN108999073A/en
Publication of CN108999073A publication Critical patent/CN108999073A/en
Withdrawn legal-status Critical Current

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    • EFIXED CONSTRUCTIONS
    • E01CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01DCONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
    • E01D11/00Suspension or cable-stayed bridges
    • E01D11/04Cable-stayed bridges
    • EFIXED CONSTRUCTIONS
    • E01CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01DCONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
    • E01D19/00Structural or constructional details of bridges
    • E01D19/14Towers; Anchors ; Connection of cables to bridge parts; Saddle supports
    • EFIXED CONSTRUCTIONS
    • E01CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01DCONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
    • E01D19/00Structural or constructional details of bridges
    • E01D19/16Suspension cables; Cable clamps for suspension cables ; Pre- or post-stressed cables
    • EFIXED CONSTRUCTIONS
    • E01CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01DCONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
    • E01D2101/00Material constitution of bridges
    • E01D2101/30Metal

Abstract

The present invention relates to a kind of cable-stayed bridges, mainly solve the problem of pontic own wt existing in the prior art is big, and caused material materials are more, higher cost.The cable-stayed bridge includes: an auxiliary pier, is arranged in cable-stayed bridge end bay;Anchor block is arranged in one girder, lower section;One Sarasota, is fixed on auxiliary pier as building, with auxiliary pier as balance fulcrum;Drag-line links together the Sarasota and bridge end with the girder.Cable-stayed bridge of the invention, using the form in the double rope faces of single column, a kind of bridge girder being directly pulled in many drag-lines on bridge tower, drag-line replaces the multispan elastic support continuous beam of buttress, problems of the prior art can be overcome, building height can be reduced, mitigate construction weight, to save material, there is preferable utilization and extention value.

Description

A kind of cable-stayed bridge
Technical field
The present invention relates to bridge fields, are related specifically to a kind of cable-stayed bridge.
Background technique
Cable-stayed bridge is also known as Cable stayed bridge, can be divided into steel deck cable stayed bridge, in conjunction with girder stayed-cable bridge and coagulation by material difference used in beam Native girder stayed-cable bridge.Cable-stayed bridge is mainly made of Sarasota, girder, suspension cable, is directly to be pulled in girder on bridge tower with many drag-lines A kind of bridge, be by the tower of pressure-bearing, the rope of tension and to hold a kind of structural system that curved beam body combines.Cable-stayed bridge is one Kind of self-anchored type system, the horizontal force of suspension cable by joist support by.Beam is further supported at other than being supported on pier by king-post extraction On suspension cable.
Existing cable-stayed bridge is typically provided multiple Sarasotas, then drag-line is cooperated to be connected with girder, if partial cable-stayed bridge further includes Do wall corresponding with Sarasota, such as fish ridge wall, some cable-stayed bridges also use the multispan elastic support continuous beam of buttress, and such one Come, often pontic building frame is higher, causes own wt big, also makes material materials more, at high cost.
Therefore, for variety of problems existing in the prior art as described above, it is therefore necessary to which designing one kind can not only Reduce the height of pontic frame, additionally it is possible to mitigate the weight of pontic itself, and then reduce the use of construction material, take to reduce Build up this.And the present invention is exactly to be directed to the problems of the prior art to carry out innovation and creation.
Summary of the invention
An object of the present invention is to provide a kind of cable-stayed bridge, to solve Design of Cable-Stayed Bridge height existing in the prior art Compared with the problem of high, pontic own wt is big, and caused material materials are more, higher cost.
The second object of the present invention is to provide a kind of construction method of cable-stayed bridge.
To reach one of above-mentioned purpose, the invention adopts the following technical scheme:
A kind of cable-stayed bridge a, comprising: auxiliary pier 1 is arranged in cable-stayed bridge end bay;Anchor block 8 is arranged in one girder 2, lower section, Main frame structure uses steelframe structure;One Sarasota 3, body frame use steel construction, are fixed on auxiliary pier 1 as building, with auxiliary pier 1 As balance fulcrum;Drag-line 4 links together the Sarasota 3 and the girder 2;And bridge end 5, it is mixed to adopt steel construction body frame use Solidifying soil pours.Girder is directly pulled on bridge tower by cable-stayed bridge using the form in the double rope faces of single column with many drag-lines herein A kind of bridge, drag-line replace the technological means of the multispan elastic support continuous beam of buttress, overcome existing in the prior art oblique Draw bridge architectural design compared with the problem of high, pontic own wt is big, and caused material materials are more, higher cost, having reached can drop Low constructional height mitigates construction weight, to save the technical effect of material.
According to one embodiment of present invention, wherein the auxiliary pier 1 is adopted steel construction body frame and is formed with concreting, The auxiliary pier 1 is provided with pulling force support in structure;The auxiliary pier 1 is used as support cable-stayed bridge auxiliary pier fulcrum with bridge end 5, Prop up bed rearrangement leaning tower bridge.The technological means made of auxiliary pier 1 adopts steel construction body frame concreting, ensure that bridge pier knot The stability of structure;The technological means of pulling force support is provided in structure using auxiliary pier 1, overcomes 1 stress of auxiliary pier more Complexity, especially under moving load effect, auxiliary pier 1 may bear biggish vertical uplift force, but cannot undertake level The problem of power, can undertake biggish horizontal force.
According to one embodiment of present invention, wherein the section of the girder 2 is board-like section.Using cutting girder 2 Face is set as the technological means in board-like section, simple structure, and wind resistance is good.
According to one embodiment of present invention, wherein the Sarasota 3 is designed using one group of A type structure, the Sarasota 3 include tower 32 on tower 31 and anchoring drag-line under double columns, and that material is made is equal for tower 32 on tower 31 and anchoring drag-line under double columns For Q370 steel, tower 31 is prestressed reinforced concrete structure under double columns.One group of A type structure is designed to using by Sarasota 3 Technological means, the problem of overcoming the Sarasota unbalance stress of cable-stayed bridge in the prior art, reached make Cable-stayed Bridge Pylon by Power is uniform, to extend the service life of Sarasota, to extend the service life of cable-stayed bridge to a certain extent, and its with Common concrete pylon is compared, small in size, and from heavy and light, anti-seismic performance is good.
According to one embodiment of present invention, wherein the drag-line 4 is made of rope head and cable body, wherein the cable body is It is made of high tensile steel wire and PE set;4 diameter of drag-line is 20mm, and the drag-line 4 is 13 groups in cable-stayed bridge left side single-sided design, Every group 2 are assigned on the bridge end 5 to the Sarasota 3, i.e. mono- group of spacing 50m;The unilateral side on the right of cable-stayed bridge of drag-line 4 is set It is set to 1 group, every group 2 are assigned on the bridge end 5 to the Sarasota 3.By increasing the quantity of drag-line 4, further dispersion is led Beam 2 arranges the power of drag-line 4, drag-line arrangement using close rope form, and rope is away from small, so that the moment of flexure of girder 2 and Sarasota 3 is small, To extend the service life of Sarasota, to extend the service life of cable-stayed bridge to a certain extent.
According to one embodiment of present invention, wherein the drag-line 4 is common rope, and the arrangement of drag-line 4 uses oblique double ropes Face, 4 spacing of drag-line is sequentially reduced from top to bottom on tower, along bridge to standard rope away from being 10m, to the pygochord near close end bay end It is encrypted, rope is away from for 7.5m;The shockproof mode of the drag-line 4 is pneumatic control method, i.e., suspension cable is original smooth surface It is made into threaded non-smooth surface.Drag-line 4 uses the technological means of the shockproof mode of pneumatic control method herein, oblique by improving The roughness on drag-line surface makes air-flow by forming turbulent flow in surface boundary layer when drag-line 4, to prevent the production of the sharp resonance in whirlpool It is raw, the wind shake of suspension cable 4 is prevented, to extend the service life of cable-stayed bridge to a certain extent.
According to one embodiment of present invention, wherein the drag-line 4 by girder Sarasota fastener 6 respectively with the master Beam 2, Sarasota 3 are fixedly connected, and anchor type of the drag-line 4 on Sarasota 3 is that inside symmetrically anchors, and anchorage uses HiAm anchorage;It is described Mode is fixedly connected with as the connection of anchor tube formula, anchor tube is mutually welded in one in anchorage point and web, to be securely fixed. Chill casting anchor rope is used herein, and relative to clip type guy of twisted steel cable, the size of the chill-cast steel-stranded anchor cable of same tonnage is wanted Much smaller, for the material of consumption also with regard to much less, outer dimension and parallel steel wire chill casting anchor rope are suitable, but than parallel steel wire chill casting Anchor rope manufacturing cost is low, and therefore, the anchorage of anchoring of the drag-line 4 on Sarasota 3 uses HiAm anchorage, and cost is lower.
According to one embodiment of present invention, wherein the anchor tube end is provided with bearing plate 10, and the drag-line 4 anchors On the bearing plate 10
According to one embodiment of present invention, wherein arrangement of the drag-line 4 on the girder 2, Sarasota 3 is adopted Arrange that rope is away from small with close rope form.Drag-line arrangement arranges that rope is away from small, so that girder 2 and Sarasota using close rope form herein 3 moment of flexure is small, so that the service life of Sarasota is extended, to extend the service life of cable-stayed bridge to a certain extent.
It is the two of arrival above-mentioned purpose, the invention adopts the following technical scheme:
A kind of a kind of construction method based on cable-stayed bridge, construction procedure are as follows:
Step 1: first carrying out strong rammer to cable-stayed bridge foundation girder 2, loading test appropriate is then done;To increase bracket bottom The forced area in portion is longitudinally poured bar shaped concrete on the basis of strong rammer;Beam body reinforcing bar is shaped in processing site by across footpath, 50% connector is staggered, and welding meets code requirement, completes the construction of auxiliary pier 1 and girder 2;
Second step, Sarasota 3 is using whole tower built, the construction of merogenesis formwork erection casting method;When setting up scaffold, need to avoid Drag-line position;Scaffold and operating platform should have enough strength and stiffness, and set safety barrier, connect every 5m height with Sarasota It connects, and sets lightning proof in cantilever tip;Because king-post section is narrow, rope pipe, the reinforcing bar for intersecting drag-line pipeline are equipped in shaft And big angle steel, installation accuracy requires height, time-consuming longer;To compress the duration, the construction of gullet plate section king-post is manufactured in advance using wooden model, Step pouring method;
Third step installs 2 steel structure of girder, and girder steel is first fixed temporarily with Sarasota 3, and girder 2 is supported using portal support;Girder Anchor block 8 is arranged in 2 lower section, and the fixation of drag-line 4 and girder 2 is fixed using anchor head 7, symmetrical on the inside of the other end and Sarasota of drag-line A pair of of drag-line 4 is just opened in anchoring;
4th step, installs the preset floorings of concrete between suspension cable 4, and secondary a pair of tensioning suspension cable is mixed to undertake part The solidifying preset floorings weight of soil;
5th step, the wet seam of pouring concrete floorings, make it with the common stress of girder steel, tensioning suspension cable makes girder steel three times Stress distribution is reasonable between concrete slab;
6th step repeats the installation process between the above drag-line 4 and girder 2 and drag-line 4 and Sarasota 3, until closing up.
The utility model has the advantages that
(1) a kind of cable-stayed bridge of the present invention, because using the technological means for setting cable-stayed bridge to the double rope face forms of single column, Girder is directly pulled in a kind of bridge on bridge tower with many drag-lines, drag-line replaces the skill of the multispan elastic support continuous beam of buttress Art means, overcome cable-stayed bridge architectural design existing in the prior art compared with high, pontic own wt is big, caused material materials More, the problem of higher cost, building height can be reduced by having reached, and mitigate construction weight, to save the technical effect of material.
(2) a kind of cable-stayed bridge of the present invention, because using by the shockproof technological means using pneumatic control mode of drag-line, By improving the roughness on suspension cable surface, make air-flow by forming turbulent flow in surface boundary layer when drag-line, to prevent whirlpool from swashing The generation of resonance prevents the wind shake of suspension cable, to extend the service life of cable-stayed bridge to a certain extent.
Detailed description of the invention
Present invention will be further explained below with reference to the attached drawings and examples.
Fig. 1 is a kind of main view of cable-stayed bridge of the present invention.
Fig. 2 is a kind of top view of cable-stayed bridge of the present invention.
Fig. 3 is a kind of bottom view of cable-stayed bridge of the present invention.
Fig. 4 is the top view that a kind of cable-stayed bridge of the present invention does not install drag-line.
Fig. 5 is the A of Fig. 1 to partial view.
Fig. 6 is the B of Fig. 1 to partial view.
Fig. 7 is the C of Fig. 1 to partial view.
Fig. 8 is the D of Fig. 1 to partial view.
Fig. 9 is a kind of main view of Cable-stayed Bridge Pylon of the present invention.
Figure 10 is a kind of top view of Cable-stayed Bridge Pylon of the present invention.
Figure 11 is a kind of left view of Cable-stayed Bridge Pylon of the present invention.
Figure 12 is the E of Figure 10 to cross-sectional view.
Figure 13 is the F of Fig. 9 to partial view.
Figure 14 is the G of Figure 12 to partial sectional view.
Figure 15 is the partial sectional view of Figure 12.
Figure 16 is the structural schematic diagram that a kind of cable-stayed bridge of the present invention does not install drag-line.
Figure 17 is the H of Figure 16 to partial schematic diagram.
Figure 18 is a kind of force analysis figure of Cable-stayed Bridge Pylon of the present invention.
In attached drawing
1, auxiliary pier 2, girder 3, Sarasota
4, drag-line 5, bridge end 6, girder Sarasota fastener
7, anchor head 8, anchor block 9, round salient point
10, bearing plate 31, tower under double columns 32, tower on drag-line is anchored
Specific embodiment
In order to make the objectives, technical solutions, and advantages of the present invention clearer, with reference to embodiments, to the present invention Embodiment is further elaborated.It is real to should be appreciated that the specific embodiments described herein are merely illustrative of the present invention Example is applied, embodiment is not intended to limit the present invention.
In the description of the present invention, it should be noted that term " center ", "upper", "lower", "left", "right", "vertical", The orientation or positional relationship of the instructions such as "horizontal", "inner", "outside" be based on the orientation or positional relationship shown in the drawings, merely to Convenient for description the present invention and simplify description, rather than the device or element of indication or suggestion meaning must have a particular orientation, It is constructed and operated in a specific orientation, therefore is not considered as limiting the invention.In the description of the present invention, it needs to illustrate Be unless specifically defined or limited otherwise, term " installation ", " connected ", " connection " shall be understood in a broad sense, for example, can be with It is to be fixedly connected, may be a detachable connection, or is integrally connected;It can be mechanical connection, be also possible to be electrically connected;It can be with It is to be connected directly, the connection inside two elements can also be can be indirectly connected through an intermediary.For the general of this field For logical technical staff, the concrete meaning of above-mentioned term in the present invention can be understood with concrete condition.
Embodiment one:
As shown in Fig. 1-3, Figure 10-12, Figure 16-18, a kind of cable-stayed bridge of the present invention is arranged using the structure in the double rope faces of single column, It mainly include auxiliary pier 1 and bridge end 5, bed rearrangement is propped up as support cable-stayed bridge auxiliary pier fulcrum in cable-stayed bridge auxiliary pier 1 and bridge end 5 Leaning tower bridge.In order to improve the rigidity of main span, the setting of auxiliary pier 1 arranges that the auxiliary pier 1 is poured using armored concrete in end bay It forms, ensure that the stability of bridge pier structure;Because 1 stress of auxiliary pier is complex, especially under moving load effect, auxiliary Pier 1 may bear biggish vertical uplift force, but cannot undertake horizontal force, thus the present invention is in 1 structure setting of auxiliary pier Pulling force support is set.Bridge end 5 is used as main supporting bridge, and adopting steel construction is that body frame is formed with concreting, can guarantee The stability of bridge pier structure.
The girder 2 of cable-stayed bridge is the directly load bearing important component of cable-stayed bridge, and structure mainly uses steel construction, and And using the arrangement of close rope form, more frivolous for the structure design of girder 2, the section of girder 2 is board-like section, is made in this way The construction for obtaining girder 2 is more simple, and wind resistance is good.
Sarasota 3 is fixed on cable-stayed bridge auxiliary pier 1 as building, is used as balance fulcrum with cable-stayed bridge auxiliary pier 1, balance is oblique Draw the stress equalization of bridge auxiliary pier 1;The body frame of Sarasota 3 uses steel construction, ensure that the stability of Sarasota structure.Sarasota 3 uses One group of A type structure designs, and the main structure of A type structure is that lower king-post strut and upper king-post strut have certain gradient.It is existing Have in technology in the construction process, Sarasota is in free state, and self weight and construction loads etc. can be in lower king-post struts and upper king-post strut root Portion forms biggish moment of flexure, generates biggish tensile stress and causes to crack, the tilting moment of generation make tower limb generate inwardly or to Outer displacement;Cheng Qiaohou due to initial torque presence and keep outside pressure in section seriously uneven, thus cause section pressure answer Power or tensile stress exceed design requirement, to influence the service life of Sarasota, and use A type structure, can just overcome existing Disadvantage in technology extends the service life of Sarasota.The Sarasota 3 of A type structure is by tower 32 on tower 31 under double columns and anchoring drag-line Composition, the material of tower 32 is Q370 steel on tower 31 and anchoring drag-line under double columns, Q370 steel intensity, toughness with higher with And it is able to bear biggish load and impact, there is good fatigue resistance, certain low-temperature flexibility and atmospheric corrosion resistance, use Also there is good welding performance and low notch sensitivity in bolt weldering bridge.Tower 31 is mixed for deformed bar under double columns Xtah Crude Clay structure, compared with common concrete pylon, have it is small in size, from heavy and light, the good advantage of anti-seismic performance.
As shown in Fig. 1, Figure 18, Sarasota 3 is used as the most important component of cable-stayed bridge, and 3 both sides of Sarasota are symmetrical drag-lines 4, leads to It crosses drag-line 4 Sarasota 3 and cable-stayed bridge main-beam 2 link together;Assuming that just only there are two drag-line 4, bilateral symmetries for Sarasota two sides One, to 3 force analysis of Sarasota, the two effects of drag-line 4 by girder 2 generate two symmetrically along drag-line to Sarasota 4 The pulling force F1 and F2 in 4 directions, the power on the left side can be decomposed into the power of horizontal direction to the left and a power straight down;Equally The power on the right can be decomposed into a power horizontally to the right and a power straight down;Due to the two power be it is symmetrical, So horizontal two power to the left and horizontally to the right offset each other, the gravity of final cable-stayed bridge main-beam 2 becomes to Sarasota 3 Two power straight down, in this way, power is the bridge pier 5 being transmitted to below Sarasota.
As shown in Figure 1, Figure 2, shown in Fig. 9, Figure 15, drag-line 4 links together Sarasota 3 and girder 2, to guarantee under enough beams Space, drag-line 4 are attached using the drag-line of diameter 20mm, and tensile strength is not less than 1670Mpa, are had good antifatigue Property.The fixation of drag-line 4 and girder 2 is fixed using anchor head 7, and anchor type of the drag-line 4 on Sarasota 3 is that inside symmetrically anchors, anchor Tool uses HiAm anchorage;Chill casting anchor rope, relative to clip type guy of twisted steel cable, the ruler of the chill-cast steel-stranded anchor cable of same tonnage Very little much smaller, for the material of consumption also with regard to much less, outer dimension and parallel steel wire chill casting anchor rope are suitable, but compare parallel steel wire Chill casting anchor rope manufacturing cost is low, and therefore, the anchorage of anchoring of the drag-line 4 on Sarasota 3 uses HiAm anchorage, and cost is lower.
Drag-line 4 is 13 groups in cable-stayed bridge left side single-sided design, and every group 2 are assigned on the bridge end 5 to the Sarasota 3, That is mono- group of spacing 50m;The unilateral side on the right of cable-stayed bridge of drag-line 4 is set as 1 group, and every group 2 are assigned to the bridge end 5 described in On Sarasota 3.Here by the quantity for increasing drag-line 4, further disperse girder 2 to the power of drag-line 4, and adopt using drag-line arrangement It is arranged with close rope form, rope is away from small, so that the moment of flexure of girder 2 and Sarasota 3 is small, so that the service life of Sarasota is extended, To extend the service life of cable-stayed bridge to a certain extent.
As shown in fig. 3 to 7, drag-line 4 is in the anchor point on girder 2 and Sarasota 3 generally not and in girder 2,3 section of Sarasota Property shaft position coincide, between can all have a distance, need to be arranged between guy anchor solid point, girder 2, Sarasota node at this time just Arm is connected, to guarantee internal force.Drag-line 4 is fixedly connected with the girder 2, Sarasota 3 respectively by girder Sarasota fastener 6, described Mode is fixedly connected with as the connection of anchor tube formula, anchor tube is mutually welded in one in anchorage point and web, to be securely fixed. Anchor tube end is provided with bearing plate 10, and drag-line 4 is anchored on bearing plate 10, sets wedge shape for bearing plate 10, it is thus possible to very The different cross dip of suspension cable is adapted to well.
Drag-line 4 is made of rope head and cable body, and wherein cable body is made of high tensile steel wire and PE set;High tensile steel wire is using high-strength Degree spring steel wire is raw material, is welded as reticular structure using special welding procedure and forms, raw material tensile strength is up to 1200MPa Have intensity high far more than the tensile strength of regular reinforcement 320MPa to 1580MPa or more, resists building under external force and occur Deformability is big;With high-ductility, when external force forces building deformation, reinforcing bar is continuous, and building not avalanche is split;Have Very high impact absorbing ability increases the absorption to the natural calamities failure energy such as high wind, earthquake.Cable body includes PE set, so that Steel strand wires can be extracted out from second layer PE set easily, change rope and apply working hour conveniently, human and material resources and time are saved, when outside drag-line It, can be effective when drag-line encounters moisture or is placed in moist occasion after one layer of longitudinal wrap covers the composite band formed by aluminum plastic belt and PE The immersion of ground resistance sealing part, considerably increases the service life of drag-line, also improves the safety that drag-line uses.Use herein Drag-line 4 be common rope, drag-line arrangement use oblique double rope faces, the arrangement to bridge floor beam body resist wind-force torsional oscillation it is effective;Pairing Using A type Sarasota 3,4 spacing of drag-line is sequentially reduced from top to bottom on tower, along bridge to standard rope away from being 10m, to close end bay end Neighbouring pygochord is encrypted, and rope is away from for 7.5m.
The shockproof mode of drag-line 4 is pneumatic control method, i.e., the original smooth surface of suspension cable is made into threaded non-light Sliding surface makes air-flow by forming turbulent flow in surface boundary layer when drag-line 4 by the roughness on raising suspension cable surface, thus It prevents whirlpool from swashing the generation of resonance, the wind shake of suspension cable 4 is prevented, to extend the service life of cable-stayed bridge to a certain extent.
As shown in figure 14, drag-line 4 can also be connect with the connection type of girder 2 by round salient point 9, in anchor tube and web Mutually the round salient point 9 of intermediate setting one of welding connects, and round salient point 9 is arranged in the coupling part of drag-line 4 and girder 2, can be right Drag-line 4 plays a kind of mode of the cushioning effect of good cushioning effect and drag-line 4.
A kind of a kind of construction method based on cable-stayed bridge, construction procedure are as follows:
Step 1: first carrying out strong rammer to cable-stayed bridge foundation girder 2, loading test appropriate is then done;To increase bracket bottom The forced area in portion is longitudinally poured bar shaped concrete on the basis of strong rammer;Beam body reinforcing bar is shaped in processing site by across footpath, 50% connector is staggered, and welding meets code requirement, completes the construction of auxiliary pier 1 and girder 2;
Second step, Sarasota 3 is using whole tower built, merogenesis formwork erection pouring construction;When setting up scaffold, need to avoid drag-line Position;Scaffold and operating platform should have enough strength and stiffness, and set safety barrier, connect every 5m height with Sarasota, And lightning proof is set in cantilever tip;The rope pipe for intersecting drag-line pipeline, reinforcing bar and big are equipped with because king-post section is narrow, in shaft Angle steel, installation accuracy requires height, time-consuming longer;To compress the duration, the construction of gullet plate section king-post is manufactured in advance using wooden model, is segmented Pouring procedure;
Third step installs 2 steel structure of girder, and girder steel is first fixed temporarily with Sarasota 3, and girder 2 is supported using portal support;Girder Anchor block 8 is arranged in 2 lower section, and the fixation of drag-line 4 and girder 2 is fixed using anchor head 7, symmetrical on the inside of the other end and Sarasota of drag-line A pair of of drag-line 4 is just opened in anchoring;
4th step, installs the preset floorings of concrete between suspension cable 4, and secondary a pair of tensioning suspension cable is mixed to undertake part The solidifying preset floorings weight of soil;
5th step, the wet seam of pouring concrete floorings, make it with the common stress of girder steel, tensioning suspension cable makes girder steel three times Stress distribution is reasonable between concrete slab;
6th step repeats the installation process between the above drag-line 4 and girder 2 and drag-line 4 and Sarasota 3, until closing up.
Although the illustrative specific embodiment of the present invention is described above, in order to the technology of the art Personnel are it will be appreciated that the present invention, but the present invention is not limited only to the range of specific embodiment, to the common skill of the art For art personnel, as long as long as various change the attached claims limit and determine spirit and scope of the invention in, one The innovation and creation using present inventive concept are cut in the column of protection.

Claims (9)

1. a kind of cable-stayed bridge, comprising:
One auxiliary pier (1), is arranged in cable-stayed bridge end bay;
Anchor block (8) are arranged in one girder (2), lower section, and main frame structure uses steelframe structure;
One Sarasota (3), body frame use steel construction, are fixed on auxiliary pier (1) as building, with auxiliary pier (1) as balance branch Point;
Drag-line (4) links together the Sarasota (3) and the girder (2);And
Bridge end (5) is adopted steel construction body frame and is formed with concreting.
2. a kind of cable-stayed bridge according to claim 1, wherein the steel construction body frame of the auxiliary pier (1) is poured with concrete It builds, the auxiliary pier (1) is provided with pulling force support in structure;
Bed rearrangement leaning tower bridge is propped up as support cable-stayed bridge auxiliary pier fulcrum in the auxiliary pier (1) and bridge end (5).
3. a kind of cable-stayed bridge according to claim 1, wherein the section of the girder (2) is board-like section.
4. a kind of cable-stayed bridge according to claim 1, wherein the Sarasota (3) is designed using one group of A type structure, The Sarasota (3) includes tower (32) on tower (31) under double columns and anchoring drag-line, tower (31) and anchoring drag-line under double columns It is Q370 steel that material, which is made, in upper tower (32), and tower (31) is prestressed reinforced concrete structure under double columns.
5. a kind of cable-stayed bridge according to claim 1, wherein the drag-line (4) is made of rope head and cable body, wherein described Cable body is made of high tensile steel wire and PE set;
Drag-line (4) diameter is 20mm, and the drag-line (4) is 13 groups in cable-stayed bridge left side single-sided design, and every group 2 are assigned to On the bridge end (5) to the Sarasota (3), i.e. mono- group of spacing 50m;Drag-line (4) unilateral side on the right of cable-stayed bridge is set as 1 Group, every group 2 are assigned to the bridge end (5) to the Sarasota (3).
6. a kind of cable-stayed bridge according to claim 5, wherein the drag-line (4) is common rope, and drag-line (4) arrangement uses Oblique double rope faces, drag-line (4) spacing is sequentially reduced from top to bottom on tower, along bridge to standard rope away from being 10m, to close end bay end Neighbouring pygochord is encrypted, and rope is away from for 7.5m;
The shockproof mode of the drag-line (4) is pneumatic control method, i.e., is made into the original smooth surface of suspension cable threaded non- Smooth surface.
7. a kind of cable-stayed bridge according to claim 5 or 6, wherein the drag-line (4) passes through girder Sarasota fastener (6) It being fixedly connected respectively with the girder (2), Sarasota (3), anchor type of the drag-line (4) on Sarasota (3) is that inside symmetrically anchors, Anchorage uses HiAm anchorage;
Anchor tube is mutually welded in one in anchorage point and web, thus by it for the connection of anchor tube formula by the mode that is fixedly connected It securely fixes.
8. a kind of cable-stayed bridge according to claim 7, wherein the anchor tube end is provided with bearing plate (10), the drawing Rope (4) is anchored on the bearing plate (10).
9. a kind of cable-stayed bridge according to claim 1, wherein the drag-line (4) is on the girder (2), Sarasota (3) Arrangement arranges that rope is away from small using close rope form.
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Application publication date: 20181214