CN107366228A - For the air drying methods of main rope of suspension bridge, system and air duct - Google Patents
For the air drying methods of main rope of suspension bridge, system and air duct Download PDFInfo
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- CN107366228A CN107366228A CN201710609915.6A CN201710609915A CN107366228A CN 107366228 A CN107366228 A CN 107366228A CN 201710609915 A CN201710609915 A CN 201710609915A CN 107366228 A CN107366228 A CN 107366228A
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- air duct
- main push
- towing rope
- air
- rope
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- 239000000725 suspension Substances 0.000 title claims abstract description 25
- 238000000034 method Methods 0.000 title claims abstract description 17
- 238000007605 air drying Methods 0.000 title claims abstract description 8
- 238000004873 anchoring Methods 0.000 claims abstract description 4
- 238000012544 monitoring process Methods 0.000 claims description 6
- 230000011218 segmentation Effects 0.000 claims description 3
- 238000003466 welding Methods 0.000 claims description 3
- 239000002689 soil Substances 0.000 claims description 2
- 230000015572 biosynthetic process Effects 0.000 claims 1
- 238000001035 drying Methods 0.000 abstract description 8
- 229910000831 Steel Inorganic materials 0.000 description 12
- 239000010959 steel Substances 0.000 description 12
- 230000000694 effects Effects 0.000 description 9
- 238000010586 diagram Methods 0.000 description 7
- 230000007797 corrosion Effects 0.000 description 5
- 238000005260 corrosion Methods 0.000 description 5
- 238000013461 design Methods 0.000 description 5
- 238000004458 analytical method Methods 0.000 description 3
- 230000006835 compression Effects 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
- 238000007796 conventional method Methods 0.000 description 2
- 238000000605 extraction Methods 0.000 description 2
- 239000004744 fabric Substances 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 229940037003 alum Drugs 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000007664 blowing Methods 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000007791 dehumidification Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000010079 rubber tapping Methods 0.000 description 1
Classifications
-
- 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
- E01D19/16—Suspension cables; Cable clamps for suspension cables ; Pre- or post-stressed cables
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- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Bridges Or Land Bridges (AREA)
Abstract
The invention discloses a kind of for the air drying methods of main rope of suspension bridge, system and air duct；Wherein, air drying methods comprise the following steps：Air duct is fixed on main push-towing rope cross-sectional internal position, substitutes original strand；Air inlet is set in two anchoring sections of main push-towing rope, dry air is delivered in air duct；Outlet valve port is set every a segment distance on main push-towing rope length direction, discharges the moisture in main push-towing rope.Drying system structure is：Main push-towing rope is provided at both ends with anchor, inlet duct is additionally provided with main push-towing rope both ends, the inlet duct is connected to the air duct in main push-towing rope, a segment distance is provided with outlet valve port on main push-towing rope, the inlet duct, air duct and air outlet valve mouth form continuous gas passage.The present invention does not Qiang Zhiyaoqiu the absolutely gas-tight of main push-towing rope, and implementation result and the more original method of sphere of action have larger improvement.
Description
Technical field
The present invention relates to main rope of suspension bridge field, particularly a kind of air drying methods for main rope of suspension bridge, system
And air duct.
Background technology
Main rope of suspension bridge is suspension bridge component non-exchange during use, and is the main bearing carrier of suspension bridge,
The service life of main push-towing rope deeply affects the service life of suspension bridge, so ensureing that the durability of main push-towing rope is extremely crucial.Suspension bridge
Main push-towing rope is chronically exposed in air, and the development of especially present bridge spanning the sea, the environment residing for main push-towing rope is more severe, causes main push-towing rope
Interior steel wire corrosion is even more serious.The steel wire corrosion of main push-towing rope can cause the bulk strength of main push-towing rope to weaken significantly, seriously endanger suspension cable
The durability and security of bridge.The main reason for influenceing suspension bridge durability is exactly to corrode, so preventing main push-towing rope corrosion extremely
It is important.
The most basic reason that main rope of suspension bridge steel wire corrodes is：Main push-towing rope interior humidity for a long time more than 80%, so
Most simply and easily method is exactly that main push-towing rope removes wet method.Japan has just set about studying main rope of suspension bridge in early 1990s
Dehumidification system simultaneously obtains great achievement.Its basic ideas is to set cord clip of supplying gas on main push-towing rope surface, makes to dry sky by air blower
Gas enters inside main push-towing rope under pressure, recycles the draught head inside and outside main push-towing rope to cause air flow, finally utilizes arrangement
Exhaust cord clip blows out the humid air inside main push-towing rope to reduce main push-towing rope internal environment humidity, avoids the steel wire corrosion of main push-towing rope.Now
The alum strait Bridge bridge of Japan, carry out island bridge and the Runyang Changjiang Highway Bridge etc. of China all employs this method.
Shown in current method layout drawing 1, be main push-towing rope surface along main push-towing rope length direction arrangement it is some supply gas cord clip and
Cord clip is vented, cord clip leads to dry air to whole main push-towing rope cross section by supplying gas, and is then blown out at exhaust cord clip.Due to drying
Air is to be pressed into outside inside main push-towing rope, to produce a desired effect, it is ensured that main push-towing rope has preferable air-tightness, otherwise dries
Air cannot be introduced into main push-towing rope.And original method will be blown into sky into whole main push-towing rope from a section of main push-towing rope with air blower
Gas, main push-towing rope is after tension cable, and the spacing very little between steel wire and steel wire, the pressure of air blower is inadequate, and the air-tightness of air inlet is not
Good, dry air may can not just reach span centre, be unable to reach main push-towing rope corrosion-resistant purpose.It is former by from the aspect of implementation result
Have that method efficiency is low, newly-built suspension bridge wants half a year or even can be only achieved less than 60% stable humidity, efficiency mistake for more time
Low and sphere of action and action effect are not ideal enough.
The content of the invention
The technical problems to be solved by the invention be to provide it is a kind of for the air drying methods of main rope of suspension bridge, system and
Air duct, the absolutely gas-tight of main push-towing rope is not Qiang Zhiyaoqiud, and implementation result and the more original method of sphere of action have larger improvement.
In order to solve the above technical problems, the technical solution adopted by the present invention is：
A kind of air drying methods for main rope of suspension bridge, comprise the following steps：
Step 1：Air duct is fixed on main push-towing rope cross-sectional internal position, substitutes original strand；
Step 2：Air inlet is set in two anchoring sections of main push-towing rope, dry air is delivered in air duct；
Step 3：Outlet valve port is set every a segment distance on main push-towing rope length direction, discharges the moisture in main push-towing rope.
A kind of air dryer systems for main rope of suspension bridge, main push-towing rope are provided at both ends with anchor, at main push-towing rope both ends also
Inlet duct is provided with, the inlet duct is connected to the air duct in main push-towing rope, is provided with out on main push-towing rope every a segment distance
Valve port while, the inlet duct, air duct and air outlet valve mouth form continuous gas passage.
Further, arrange that temperature sensor, humidity sensor and gas status monitoring pass along air duct length direction
Sensor, this three kinds of sensors be used to monitoring it is non-ventilating in the case of ambient condition in main push-towing rope；This three kinds of sensor lontitudinal series, energy
Enough timing renewals are replaced.
A kind of air duct for main rope of suspension bridge, stomata, the shape bag of the stomata are provided with the air duct
Include circle or oval；Air duct wall thickness meets stabilized soil pavement requirement with air duct external diameter.
Further, the air duct is segmentation structure, is connected between every section of air duct by connector, is formed
The air duct of one entirety；Connected mode between every section of air duct and connector includes welding or internal and external threads connection.
Compared with prior art, the beneficial effects of the invention are as follows：The cloth that cord clip is sent, be vented on main push-towing rope be present in conventional method
Set up an office more, the defects of laying, use, the big workload of maintenance, because cloth sets up an office more, the uniformity for causing to send, be vented is difficult to protect
Card, whole efficiency are low.And the present invention is that perforate pipeline (air duct) is positioned over inside main push-towing rope, then with air blower from pipeline
One end is passed through dry air, and dry air is again from the aperture outflow opened up, and then be full of whole main push-towing rope, by the wet sky inside main push-towing rope
Air-blowing goes out, and maintains the drying inside main push-towing rope.Thus without requiring main push-towing rope air inlet total cross-section complete air-tightness, Er Qieqi
Body can be full of whole main push-towing rope more easily, if to reach more preferable effect on moisture extraction, reduce drying time, need to only be cut in main push-towing rope
Correct position sets up pipeline in face.
Brief description of the drawings
Fig. 1 is conventional method rough package drawing.
Fig. 2 is the inventive method rough package drawing.
Fig. 3 is main push-towing rope section strand schematic diagram.
Fig. 4 is one of intensive analysis schematic diagram.
Fig. 5 is the two of intensive analysis schematic diagram.
Fig. 6 is stability analysis schematic diagram.
Fig. 7 is conventional steel wire strand schematic cross-section.
Fig. 8 is that pipeline is inscribed within strand schematic diagram.
Fig. 9 is air duct structural representation.
Figure 10 is connecting-piece structure schematic diagram.
Figure 11 is the connection effect schematic diagram using connector connection air duct.
In figure：1- supplies gas folder；2- exhaust clips.
Embodiment
The present invention is further detailed explanation with reference to the accompanying drawings and detailed description.As shown in Fig. 2 preset hinge
The merogenesis air duct (air duct can use steel pipe or other tubing) connect, in air duct side-wall hole, is put
Put in main push-towing rope cross-sectional internal position, substitute original strand；Air inlet is set in two anchoring sections of main push-towing rope, in main push-towing rope length direction
On every a segment distance set outlet valve port.Dry air enters air duct from air inlet, then from the small of air duct side wall
Hole is flowed into inside main push-towing rope, is finally discharged from gas outlet, the moisture taken out of in main push-towing rope.Arrangement of the air duct in main push-towing rope such as Fig. 3
It is shown, substitute one or a few original strand, depend on the circumstances.
The air duct structure design is as follows：
1st, intensity
As shown in Figure 4 and Figure 5, for air duct, after first having to ensure that it is preset in main push-towing rope, in tight cable and tight rope
There is enough intensity under power.The densely covered steel wire of pipeline inside main push-towing rope, it may therefore be assumed that preformed open-cell pipeline bears Fig. 5
Shown evenly load.Load q maximum is：
In formula：[σ] is steel compression strength design load, can use Q345 steel, and compression strength design load is taken as 250Mpa；
T is pipeline wall thickness；D is outer diameter tube.
Reduced in view of intensity after air duct perforate, so introducing area compensationIt is air duct length
Interior notch length reduction rate maximum caused by perforate.Due to perforate, cause the reduction of air duct bearing capacity, therefore after perforate
The peak load that air duct can be born is：
Q is the actual evenly load value of pipeline.
2nd, stability
Air duct is circular section, buckling critical loads as shown in fig. 6, with reference to skene arch stability formula, can obtain
The load critical value for acting on periphery is：
E is the modulus of elasticity of pipeline material.
Same because perforate, air duct wall area produces reduction, so the cross-sectional unit length the moment of inertia after perforate becomes
For：
Then have
Therefore, as long as making qcr＞ q, the then design of air duct obtain air duct wall thickness and air duct by strength control
The relation that diameter should meet：
3rd, air duct size and percent opening
The strand section as shown in Figure 7 commonly used according to the preset parallel thread main push-towing rope of suspension bridge, in order that air duct energy
Enough it is conveniently placed in main push-towing rope, it is as shown in Figure 8 that air duct is inscribed within into hexagon strand.Simultaneously in order to make and construct
It is convenient, pipeline model is distinguished into respective outer diameters 40mm, 50mm, 60mm and 70mm.For 61,91,127 and 169 ropes
Stock, if steel wire diameter 5.3mm, air duct design of material intensity 250Mpa, tube circumference pressure 10MPa, determine pipe diameter,
Wall thickness, maximum percent opening, and respective table lattice are listed, as shown in table 1.
The different operating mode pipeline tapping rates of table 1
| External diameter mm | Wall thickness mm | Strength co-mputation percent opening | Stable calculation percent opening |
| 40 | 2 | 20.00% | 23.81% |
| 40 | 2.5 | 36.00% | 60.99% |
| 40 | 3 | 46.67% | 77.43% |
| 40 | 3.5 | 54.29% | 85.78% |
| 50 | 2.5 | 20.00% | 23.81% |
| 50 | 3 | 33.33% | 55.91% |
| 50 | 3.5 | 42.86% | 72.23% |
| 60 | 3 | 20.00% | 23.81% |
| 60 | 3.5 | 31.43% | 52.02% |
| 60 | 4 | 40.00% | 67.86% |
| 70 | 4.5 | 37.78% | 64.15% |
| 70 | 5 | 44.00% | 73.87% |
| 70 | 5.5 | 49.09% | 80.37% |
In order to assess the effect supplied gas, and the determination of air duct number reaches drying effect institute, it is necessary to obtain main push-towing rope
The drying time needed.The drying time of usual main push-towing rope is 1 year.So to need to reach expected drying effect, institute in 1 year
The air duct number needed will be determined by required gas pushing quantity.
After gas stream enters main push-towing rope inside, the pressure inside main push-towing rope can gradually increase.When gas is full of main push-towing rope, and pressure values surpass
The pressure values that gas outlet valve is set are crossed, gas will discharge from the gas outlet set, so as to reach preferable effect on moisture extraction.
Air duct can use segmentation structure, less with axial rigidity by bending stiffness between every section of air duct
Connector connection (connects) for example with bellows, forms the air duct of an entirety.When using being threadedly coupled, every section is sent
One end that feed channel is connected with connector is provided with internal thread, and connector both ends are provided with what is matched with the internal thread of air duct
External screw thread, connector are used with every section of air duct and are threadedly coupled.Certainly, can also be adopted between every section of air duct and connector
With welding or other connected modes.Every section of air duct junction uses connector, and this part of connector is very short, so can be with
Ensure that the diameter of connector is small compared to air duct diameter, prevent connector from being acted on by tight cable and cord clip fastening force.Enter
And the tension of air duct junction can be eliminated and by curved effect so that air duct preferably meets stress and linear need
Ask.
Along air duct length direction arrangement temperature sensor, humidity sensor and gas status monitoring sensor, this three
Kind of sensor be used to monitoring it is non-ventilating in the case of ambient condition in main push-towing rope；This three kinds of sensor lontitudinal series, can regularly more
It is new to replace.
Claims (5)
1. a kind of air drying methods for main rope of suspension bridge, it is characterised in that comprise the following steps：
Step 1：Air duct is fixed on main push-towing rope cross-sectional internal position, substitutes original strand；
Step 2：Air inlet is set in two anchoring sections of main push-towing rope, dry air is delivered in air duct；
Step 3：Outlet valve port is set every a segment distance on main push-towing rope length direction, discharges the moisture in main push-towing rope.
A kind of 2. air dryer systems for main rope of suspension bridge, it is characterised in that
Main push-towing rope is provided at both ends with anchor, and inlet duct is additionally provided with main push-towing rope both ends, and the inlet duct is connected to main push-towing rope
Interior air duct, a segment distance is provided with outlet valve port, the inlet duct, air duct and outlet valve port on main push-towing rope
Form continuous gas passage.
A kind of 3. air dryer systems for main rope of suspension bridge as claimed in claim 2, it is characterised in that
Along air duct length direction arrangement temperature sensor, humidity sensor and gas status monitoring sensor, this three kinds biographies
Sensor be used to monitoring it is non-ventilating in the case of ambient condition in main push-towing rope；This three kinds of sensor lontitudinal series, can regularly update and replace
Change.
A kind of 4. air duct for main rope of suspension bridge, it is characterised in that
Stomata is provided with the air duct, the shape of the stomata includes circle or oval；Air duct wall thickness and air duct
External diameter meets stabilized soil pavement requirement.
A kind of 5. air duct for main rope of suspension bridge as claimed in claim 4, it is characterised in that
The air duct is segmentation structure, is connected between every section of air duct by connector, and one entirety of formation is sent
Feed channel；Connected mode between every section of air duct and connector includes welding or internal and external threads connection.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710609915.6A CN107366228A (en) | 2017-07-25 | 2017-07-25 | For the air drying methods of main rope of suspension bridge, system and air duct |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710609915.6A CN107366228A (en) | 2017-07-25 | 2017-07-25 | For the air drying methods of main rope of suspension bridge, system and air duct |
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| CN107366228A true CN107366228A (en) | 2017-11-21 |
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| CN201710609915.6A Pending CN107366228A (en) | 2017-07-25 | 2017-07-25 | For the air drying methods of main rope of suspension bridge, system and air duct |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108589530A (en) * | 2018-06-14 | 2018-09-28 | 法尔胜泓昇集团有限公司 | The air feeder structure and its implementation of dry air dehumidifying |
| CN112301888A (en) * | 2020-10-23 | 2021-02-02 | 无锡金诚工程技术服务有限公司 | Suspension bridge main cable with inner gas transmission pipeline |
| CN112726431A (en) * | 2020-12-29 | 2021-04-30 | 中交公路规划设计院有限公司 | Main cable dehumidification corrosion prevention device |
| CN113235428A (en) * | 2021-05-21 | 2021-08-10 | 浙江数智交院科技股份有限公司 | Bridge main cable structure |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108589530A (en) * | 2018-06-14 | 2018-09-28 | 法尔胜泓昇集团有限公司 | The air feeder structure and its implementation of dry air dehumidifying |
| CN112301888A (en) * | 2020-10-23 | 2021-02-02 | 无锡金诚工程技术服务有限公司 | Suspension bridge main cable with inner gas transmission pipeline |
| CN112726431A (en) * | 2020-12-29 | 2021-04-30 | 中交公路规划设计院有限公司 | Main cable dehumidification corrosion prevention device |
| CN113235428A (en) * | 2021-05-21 | 2021-08-10 | 浙江数智交院科技股份有限公司 | Bridge main cable structure |
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Application publication date: 20171121 |
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