CN1162586C - Method for dynamic control of nondestructive replacement of tied arch bridge hanger rod - Google Patents
Method for dynamic control of nondestructive replacement of tied arch bridge hanger rod Download PDFInfo
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- CN1162586C CN1162586C CNB021369232A CN02136923A CN1162586C CN 1162586 C CN1162586 C CN 1162586C CN B021369232 A CNB021369232 A CN B021369232A CN 02136923 A CN02136923 A CN 02136923A CN 1162586 C CN1162586 C CN 1162586C
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- suspension rod
- control
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- jack
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Abstract
The present invention relates to a dynamic control method for replacing a suspension rod without damage for a rod tied arch bridge, which comprises the contents on two aspects: length determination of a novel replacement suspension rod and replacement process control of the suspension rod: (1) stretching force control; (2) bridge surface reactive force control; (3) force transfer control. The present invention also designs a special tool of suspension rod used for controlling the replacement process of the suspension rod. The method of the present invention realizes the smooth transfer of force to the novel suspension rod from an analog replacement suspension rod, so the replacement of the suspension rod can be without damage; furthermore, the present invention has the advantages of safety, reliability and less engineering work load.
Description
Technical field
The invention belongs to technical field of bridge engineering, be specifically related to a kind of kinetic controlling equation method of suspension rod nondestructive replacement of bowstring arch bridge.
Background technology
China has built seat surplus the bowstring arch bridge about 40,000 at present, because the restriction of various history, condition of technology and economy, quite most arch bridge has arrived the overhaul stage.Especially suspension rod arch bridge, because suspension rod wherein is the key member of power transmission, has local stressed static determinacy, in case go wrong, the chain destruction that will cause structure, finally can cause most of or whole the caving in of whole bridge deck, just belong to this example as south gate, Yibin bridge that has taken place.
On the other hand, suspension rod belongs to prestressed member, the accurate foundation of its stress and the structure of end anchorage, anchor clamps etc. are handled, the restriction of the material when all being subjected to building, technical level etc., maintain the limitation of measure in addition, making that the suspension rod of this class bridge is stressed differs far with the design stress or very far away, especially when suspension rod is made up of a large amount of parallel wire units, eccentric (or heavy sometimes eccentric), corrosion, fracture of wire, indivedual steel wire lax (not bringing into play the carrying effect) or the like can take place, and above-mentioned situation has just appearred in we detect Shouchuan, Hefei road and bridge.
After these potential safety hazards detection diagnosis, need to change suspension rod, so that the new technology of suspension rod, new material and anchor clamp technology are applied in the maintenance work of beam, guarantee the people's the security of the lives and property conscientiously.
At present, though it is more that the accident of arch bridge takes place, but the processing aspect that discovery in processing after having an accident and the detection maintenance is had the suspension rod arch bridge of hidden danger, also do not have a cover to meet the mature technology report of economy, safety and Technical Development Requirement, common processing has: part rebuild, explode reconstruction, in a large number be provided with support change and the bridge deck damage serious etc.
Summary of the invention
The objective of the invention is to propose a kind of kinetic controlling equation method of nondestructive replacement of tied arch bridge hanger rod, and guarantee to change safe, reliable, economical, to eliminate the hidden danger of arch bridge, prolong the application life of arch bridge.
The kinetic controlling equation method of the nondestructive replacement of tied arch bridge hanger rod that the present invention proposes comprises the content of two aspects: the one, and replace the design of new length of boom and determine; The 2nd, the control of suspender replacement process: the control of (1) stretching force, the control of (2) bridge floor reaction, the transfer control of (3) power.
The design of new length of boom because the setting-out length of suspension rod is zero stress length, and as and measure be length tension state under, should be converted to setting-out length, this just requires, and bridge Suo Li's is accurately definite.
Suo Li accurately determines by two kinds of approach, checks mutually and revises, and by Probability Statistics Theory, estimates and checks.A kind of method is that finite element theory calculates, and influencing parameter has: the difference that model is set up, the discrepancy of parameter value etc.; Another kind method is the vibration frequency method, field measurement, and influencing parameter has: sensitivity, the influence of edge-restraint condition, the influence of bending stiffness, the off-centre of suspension rod steel tendon, the dispersion of picking up the shake device influence natural frequency etc.In view of above-mentioned two class reasons, the Suo Li of accurate Calculation and actual measurement suspension rod steel wire, thus the setting-out length of the new suspension rod that converts has deviation, so after having obtained two groups of data of Suo Li, also want overall balance, determines according to Probability Statistics Theory.The error in length of new suspension rod should be got plan replacing length of boom+about 2%.
In the control of suspender replacement process, many jack (being generally 4) are adopted in the control of stretching force, by automatic servodevice, make the jack that loads synchronous, make the center of gravity of making a concerted effort that applies and intend changing the axle center of suspension rod and new suspension rod on same straight line.
A kind of suspension rod instrument has been adopted in the transfer of power control, and one group of (being generally 4) jack on the welding steel box-shaped cushion cap of the quadrature by being placed on the suspension rod instrument loads and realize, exerts all one's strength and smoothly transfers to new suspension rod from intending changing suspension rod.
Among the present invention, used custom-designed suspension rod instrument when suspender replacement, its structure is as follows: constitute (see figure 1) by box-shaped cushion cap, fining twisted steel, locking safetybolt, office's pressure pad plate, hydraulic jack and adjusting steel bracket.Wherein, box-shaped cushion cap 1 is made of in the welding of place, the edge of a wing 2 i iron 11 and 12, is provided with the steel rib 13 of putting more energy between the i iron edge of a wing; Office's pressure pad plate 2 is arranged at the two ends of the joint of i iron, has the preformed hole 5 that runs through the box-shaped cushion cap on office's pressure pad plate 2, is used to pass fining twisted steel 3, and preformed hole 5 is generally 2-4; Locking safetybolt 4 is made of pair of bolts 11 and 12, during work for fixing to fining twisted steel 3; Hydraulic jack 6 is located on the box-shaped cushion cap, regulates steel bracket 7 and is arranged between box-shaped cushion cap 2 and the jack 6.Usually deserve to be called that to state from self-con-tained unit be the instrument suspension rod.
In engineering was used, the box-shaped cushion cap was made of 4 bond pads i iron 11 and 12 quadrature settings, and corresponding fining twisted steel 3, hydraulic jack 6, adjusting steel bracket 7 etc. also are 4 groups.
The dimensional parameters symbol of each main member is seen accompanying drawing 2:
(1) welding H-bar size Control parameter.Single welding H-bar size index is shown in Fig. 2 (a): flange width b
f, edge of a wing thickness h
F1, h
F2, web height h
w, web width b
wThe appearance and size controlling parameter of welding back instrument suspension rod is shown in Fig. 2 (d), (e): length L, width W, height H (H=2h
F2+ h
w).
(2) the size Control parameter of office's pressure pad plate 2 is shown in Fig. 2 (b): thickness h
a, the outer development length h of bolt
b
(3) put more energy into the size Control parameter of steel rib 13 shown in Fig. 2 (c), (e): spacing d
1And d
2, and the number n of the steel rib of putting more energy into, the planar dimension h of the steel rib of putting more energy into
rAnd b
r
(4) the size Control parameter of fining twisted steel 3 is its diameter δ and the high-strength bolt that matches with pitch.
(5) the size Control parameter index that concerns between office's pressure pad plate, reserving hole channel and the high-strength bolt is: w
i, d
v, d
hSee shown in Fig. 2 (f).
(6) size Control parameter such as Fig. 2 (f) of office's compressed steel plate are depicted as: length h
s, width w
s
(7) hydraulic jack and regulate selecting for use with design parameters of steel bracket the load tonnage of intending changing bridge is arranged is specifically selected for use and is designed.
Among the present invention, fining twisted steel 3 is selected according to the needs of concrete engineering, its length is convenient to regulate, and quantity some (according to decisions such as the quantity of intending changing the bridge suspension rod, the length difference opposite sex), the pitch of the high-strength bolt of adjacent fining twisted steel joint should satisfy requirement of strength, fining twisted steel after the assembling is intended changing the internal force of suspension rod and internal force progressively is delivered to the core power transmission translation building block of new suspension rod for load shedding progressively, and the center of gravity of making a concerted effort of its intensity and assembling fining twisted steel group is main mechanics controlling parameter with the degree of deviation of intending changing the suspension rod geometric center of gravity.Locking safetybolt 4 has 2 bolts, and be used for anti-locking apparatus and get loose, but and adjustment release internal force.Office's pressure pad plate 2 is excessive for preventing suspension rod internal force, crushes bad and point load disperser that be provided with to instrument suspension rod top flange (cover plate) generation office.Reserving hole channel 5 is the usefulness of interspersed fining twisted steel, generally reserves 4 ducts on each instrument suspension rod, sees accompanying drawing 1 (b).The welding H-bar 11 of box-shaped cushion cap 1 and welding H-bar 12 are the cage construction of this instrument derrick rig, should satisfy structure design indexs such as intensity, stable, rigidity drawn game pressure.Regulate steel bracket 5 and be at suspension rod and progressively in hierarchical loading or the discharge mechanism process, play safety effect, the fuel tap door that ends of hydraulic jack also has insurance function simultaneously.The effect and the principle of hydraulic jack and reading control oil meter: be the core component of this device control, 4 jack of employing apply synchronously or discharge load in the common engineering, thereby it selects for use principle that loading scope, precision and Synchronization Control performance etc. are arranged.
In the suspender replacement process, the reaction of bridge deck and whole bridge construction control, realize by following three approach are comprehensive:
(1) paste the scale steel ruler with epoxy resin in the crosspoint place of beam in length and breadth at each,, set up total powerstation, measure in the suspender replacement process in suitable distance from arch bridge, the relative displacement of girder system, be controlled at ± 3mm in.
(2) control by the stretching extension amount that is placed in four jack on the welding steel box-shaped cushion cap, pitch is controlled in the 3mm.
(3) by the oil meter reading of stretch-draw jack, control tension force, thus the transfer step of control.
The inventive method, the power that realized smoothly shifts to new suspension rod from intend changing suspension rod, thereby makes the replacing of tied arch bridge hanger rod accomplish not damaged, and safety, reliable, engineering quantity is also less.
Description of drawings
Fig. 1 is instrument hanging rod structure diagram.Wherein, Fig. 1 (a) elevation, Fig. 1 (b) is a cross-section illustration, Fig. 1 (c) is the plane diagram.
Fig. 2 is the member parameter diagram of instrument suspension rod.Wherein Fig. 2 (a) is the single welding H-bar structural parameters diagram of box-shaped cushion cap 1, Fig. 2 (b) is office's pressure pad plate 2 structural parameters diagram, Fig. 2 (c) is ribs spacing diagram, Fig. 2 (d) is welding H-bar dimensional parameters diagram, Fig. 2 (e) is ribs structural parameters diagram, and Fig. 2 (f) is backing plate, duct, bolt arrangement parameter diagram.
Number in the figure: number in the figure: 1 is the box-shaped cushion cap, and 2 is office's pressure pad plate, and 3 is fining twisted steel, and 4 is locking safetybolt, and 5 is preformed hole, and 6 is hydraulic jack, and 7 for regulating steel bracket, and 11,12 is welding H-bar, and 13 is steel reinforcing segments.
The specific embodiment
Embodiment, the suspender replacement with somewhere half-through suspension rod arch bridge is an example below, specifies the structure of this device, the value of each controlling parameter of device is as follows:
(a) the flange width b of welding H-bar
f=120mm, edge of a wing thickness h
F1=12mm, h
F2=20mm, web height h
w=310mm, web width b
w=20mm;
(b) the appearance and size length L of welding back instrument suspension rod, width W=280mm, height H=350mm.
(c) the size h of office's pressure pad plate
s* w
s=280 * 1650mm
2
(d) the put more energy into parameter of steel rib: number n=6, rib thickness ω=20mm, d
1=d
2=80mm, the total length of rib are l=440mm.
(e) the size Control parameter of fining twisted steel is its diameter δ=32mm, and length is got 2.5m, 4.5m, and 9m etc. are several.
(f) hydraulic jack is selected the CY70 jack for use.
(h) load big or small m=120kN, loading progression is n=5～8 time at every turn.Bridge deck Deformation control amplitude is ± 3mm that the power control range is ± 0.8kN.The suspender replacement of this arch bridge is very well, and bridge is a not damaged.
Claims (7)
1, a kind of kinetic controlling equation method of nondestructive replacement of tied arch bridge hanger rod is characterized in that comprising the content of 2 aspects:
(1) design of replacing new length of boom is determined;
(2) control of suspender replacement process:
(1) control of stretching force,
(2) control of bridge floor reaction,
(3) control of the transfer of power.
2, kinetic controlling equation method according to claim 1 is characterized in that the design length according to the accurately definite new suspension rod of bridge Suo Li, and error is for intending replacing about 2% of length of boom.
3, kinetic controlling equation method according to claim 2 is characterized in that determining that wherein, theoretical calculating can be adopted reasonable first method after bridge Suo Li is by theoretical calculating and field measurement that field measurement adopts the vibration frequency method.
4, kinetic controlling equation method according to claim 1, many jack are adopted in the control that it is characterized in that stretching force, and by automatic servodevice, make the jack that loads synchronous, make the center of gravity of making a concerted effort that applies and the axle center of intending changing suspension rod and new suspension rod on same straight line.
5, kinetic controlling equation method according to claim 1 is characterized in that in the suspender replacement process, and the reaction of bridge deck and whole bridge construction control comprehensively realizes by following three approach:
(1) paste the scale steel ruler with epoxy resin in the crosspoint place of beam in length and breadth at each,, set up total powerstation, measure in the suspender replacement process in suitable distance from arch bridge, the relative displacement of girder system, be controlled at ± 3mm in;
(2) control by the stretching extension amount that is placed in four jack on the welding steel box-shaped cushion cap, pitch is controlled in the 3mm;
(3) by the oil meter reading of stretch-draw jack, control tension force power, thus the transfer step of control.
6, kinetic controlling equation method according to claim 1, a kind of suspension rod instrument has been adopted in the transfer control that it is characterized in that power, one group of jack on the welding steel box-shaped cushion cap of the quadrature by being placed on the suspension rod instrument loads to be realized, exerts all one's strength and smoothly transfers to new suspension rod from intending changing suspension rod.
7, used instrument suspension rod in a kind of kinetic controlling equation method implementation process of nondestructive replacement of tied arch bridge hanger rod according to claim 1, constitute by box-shaped cushion cap, fining twisted steel, locking safetybolt, office's pressure pad plate, hydraulic jack and adjusting steel bracket, it is characterized in that box-shaped cushion cap (1) is made of in the welding of place, the edge of a wing 2 i iron (11) and (12), is provided with the steel rib (13) of putting more energy between the i iron edge of a wing; Office's pressure pad plate (2) is arranged at the two ends of the joint of i iron, have the preformed hole (5) that runs through the box-shaped cushion cap on office's pressure pad plate (2), be used to pass fining twisted steel (3), locking safetybolt (4) is made of pair of bolts (11) and (12), during work for fixing to fining twisted steel (3); Hydraulic jack (6) is located on the box-shaped cushion cap, regulates steel bracket (7) and is arranged between box-shaped cushion cap (2) and the jack (6).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB021369232A CN1162586C (en) | 2002-09-10 | 2002-09-10 | Method for dynamic control of nondestructive replacement of tied arch bridge hanger rod |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB021369232A CN1162586C (en) | 2002-09-10 | 2002-09-10 | Method for dynamic control of nondestructive replacement of tied arch bridge hanger rod |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1401854A CN1401854A (en) | 2003-03-12 |
| CN1162586C true CN1162586C (en) | 2004-08-18 |
Family
ID=4748823
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB021369232A Expired - Lifetime CN1162586C (en) | 2002-09-10 | 2002-09-10 | Method for dynamic control of nondestructive replacement of tied arch bridge hanger rod |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1162586C (en) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102286942B (en) * | 2011-08-23 | 2013-03-06 | 河海大学 | Device for replacing suspenders of tied arch bridge |
| CN104746442B (en) * | 2015-04-17 | 2016-08-24 | 柳州欧维姆工程有限公司 | For changing the withdrawing steel wire of the old suspension rod of arched bridge pre-stressed boom and hole cleaning device assembly and the method removed for old suspension rod thereof |
| CN105002836B (en) * | 2015-07-27 | 2017-01-25 | 丁洪华 | Construction method for rapidly replacing arch bridge tie bars in situ |
| CN105401532B (en) * | 2015-12-16 | 2017-05-03 | 柳州欧维姆工程有限公司 | Device for replacing traction friction type anchoring hanger rod and method for replacing steel tube arch bridge hanger rod by using device |
| CN106087770B (en) * | 2016-08-12 | 2017-10-31 | 柳州欧维姆工程有限公司 | Hood type instrument derrick rig for steel pipe truss concrete arch-type bridge suspender replacement |
| CN109518587B (en) * | 2019-01-22 | 2023-09-29 | 中铁二院工程集团有限责任公司 | Plate-type suspender for inhibiting vortex-induced resonance |
-
2002
- 2002-09-10 CN CNB021369232A patent/CN1162586C/en not_active Expired - Lifetime
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| Publication number | Publication date |
|---|---|
| CN1401854A (en) | 2003-03-12 |
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| C06 | Publication | ||
| PB01 | Publication | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
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| CX01 | Expiry of patent term |
Granted publication date: 20040818 |