CN110158476A - A kind of method for stretching for cord clip of suspension bridge screw rod - Google Patents
A kind of method for stretching for cord clip of suspension bridge screw rod Download PDFInfo
- Publication number
- CN110158476A CN110158476A CN201910431076.2A CN201910431076A CN110158476A CN 110158476 A CN110158476 A CN 110158476A CN 201910431076 A CN201910431076 A CN 201910431076A CN 110158476 A CN110158476 A CN 110158476A
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- screw rod
- axle power
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- tensioning
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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
- E01D19/16—Suspension cables; Cable clamps for suspension cables ; Pre- or post-stressed cables
-
- 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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- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Ropes Or Cables (AREA)
- Bridges Or Land Bridges (AREA)
Abstract
The invention discloses the method for stretching for cord clip of suspension bridge screw rod, cord clip screw rod are divided into two groups, first group has N1A, second group has N2It is a, the average axle power F before calculating separately two groups of screw stretchings1And F2, the compression deformation Δ L of full screw rod main push-towing rope in the case where designing axle power F tensioning is calculated, stretcher strain amount Δ l of any screw rod under F tensioning is calculated, first group of screw rod applies N1The axle power of (F+ Δ F), according to N1、N2, Δ L, F and F1, calculate the increased compression deformation Δ L of main push-towing rope1；According to F2, F, Δ l and Δ L1, calculate the average axle power F ' of second group of screw rod2；Second group of screw rod applies N2The tensioning axle power of F, according to N1、N2, F, Δ L and F '2, calculate the increased compression deformation Δ L of main push-towing rope2；According to F, Δ L2, Δ l and Δ F, calculate the average axle power F ' of first group of screw rod1；According to F=F '1, full screw rod grouping tensioning is calculated to reach additional axle power Δ F required for F.The present invention solves the problems, such as screw rod because the screw rod axle power that grouping tensioning generates reassigns.
Description
Technical field
The present invention relates to suspension bridge engineering construction fields, and in particular to a kind of tensioning side for cord clip of suspension bridge screw rod
Method.
Background technique
Cord clip of suspension bridge is one of the main member of suspension bridge superstructure, is that cord clip exists in the Major Diseases of use process
It is slid on main push-towing rope, the reason is that caused by cord clip screw rod fastening force is insufficient, highway in China bridges and culverts Maintenance specification (2004)
3.3.9 item requires to check " whether the cord clip of suspension bridge sunpender upper end and main rope loosen, shift and damaged ", Highway bridge technique
Cord clip sliding is also greater than 10mm in status assessment standard (2011) 7.2.1 item and is considered as serious defect.
The construction of main push-towing rope cord clip screw rod generally uses jack tension method to complete.To weaken or avoiding same cord clip screw rod first
The problem of post-stretching screw rod fastening force reassigns, needs to consider that the mode of all screw rod synchronous tensions of same cord clip is constructed,
Cause the loss of pretensioning screw rod fastening force when in this way can be to avoid subsequent screw stretching.But generally proximate to the rope of tower top
Screw rod quantity is more on folder, for example certain bridge amounts to 18 close to cord clip structure each 9 screw rods up and down on bridge top, if synchronous
It draws, then needs the synchronous installation tensioning of 18 tensioners, however 18 tensioners are installed simultaneously in cord clip structure and are not filled at all
The space of foot, or the work of nut switch is impacted, it also will increase double device requirement and more cost of labor, therefore
It is still determined in practice of construction and is divided to 8 screw rod, two groups of tensioning of+10 screw rod, but be grouped tensioning and screw rod axle power reassignment is caused to ask
Topic, therefore all screw rods on the same cord clip must not could be completed without at least two-wheeled tensioning.
Summary of the invention
In view of the deficiencies in the prior art, the purpose of the present invention is to provide a kind of for cord clip of suspension bridge screw rod
Method for stretching solves the problems, such as that screw rod is because the screw rod axle power that grouping tensioning generates reassigns on cord clip.
To achieve the above objectives, the technical solution adopted by the present invention is that:
A kind of method for stretching for cord clip of suspension bridge screw rod, this method comprises the following steps:
Screw rod all on cord clip is divided into two groups, wherein first group has N1A, second group has N2It is a, and calculate separately
The average axle power F of one group and second group of screw rod before tensioning1And F2；
(N is applied simultaneously to screw rod all on cord clip1+N2) F tensioning axle power, calculate the compression deformation Δ L of main push-towing rope,
An optional screw rod from screw rod all on cord clip, calculating stretcher strain amount Δ l, F of the screw rod under F tensioning is screw rod
Design axle power；
N is applied to first group of screw rod1The tensioning axle power of (F+ Δ F), according to N1、N2, Δ L, F and F1, it is increased to calculate main push-towing rope
Compression deformation Δ L1, Δ F is that all screw rods are grouped tensioning to reach additional axle power required for design axle power；
According to F2, F, Δ l and Δ L1, calculate the average axle power F ' of second group of screw rod2；
N is applied to second group of screw rod2The tensioning axle power of F, according to N1、N2, F, Δ L and F '2, calculate the increased compression of main push-towing rope
Deflection Δ L2；
According to F, Δ L2, Δ l and Δ F, calculate the average axle power F ' of first group of screw rod1；
According to F=F '1, calculate Δ F.
On that basis of the above technical scheme, according to formula:
Calculate the increased compression deformation Δ L of main push-towing rope1。
On that basis of the above technical scheme, according to formula:
Calculate the average axle power F ' of second group of screw rod2。
On that basis of the above technical scheme, according to formula:
Calculate Δ L2。
On that basis of the above technical scheme, according to formula:
Calculate the average axle power F ' of first group of screw rod1。
On that basis of the above technical scheme, according to formula:
Calculate Δ F.
On that basis of the above technical scheme, according to formula:
Wherein f1、f2、…The respectively axle power that first group of each screw rod measures before tensioning, f '1、f′2、…Respectively
For the axle power that second group of each screw rod measures before tensioning.
On that basis of the above technical scheme, according to formula: Δ L=L-L '
Wherein L is the main push-towing rope actual diameter for measure before tensioning to all screw rod on cord clip, L ' be N number of screw rod simultaneously
Main push-towing rope theoretical diameter is obtained after designing axle power F tensioning.
On that basis of the above technical scheme, according to formula:
Wherein lSpiral shellFor the nominal length of screw rod, dSpiral shellFor the nominal diameter of screw rod, E is the elastic force modulus of screw rod.
Compared with the prior art, the advantages of the present invention are as follows:
A kind of method for stretching for cord clip of suspension bridge screw rod provided by the invention carries out the screw rod on cord clip of suspension bridge
It is grouped tensioning, by measuring the average axle power F before tensioning1And F2And the pressure of all screw rods main push-towing rope under the tensioning of design axle power F
The stretcher strain amount Δ l of compression deformation amount Δ L and single the screw rod screw rod under the tensioning of F, goes out suspension cable further according to multiple formula to calculating
The additional axle power applied required for bridge screw rod can make the axle power for the suspension bridge screw rod for being grouped tensioning reach design axle power.It solves
Screw rod reassigns problem because of the screw rod axle power that grouping tensioning generates.
Detailed description of the invention
Fig. 1 is suspension bridge screw rod schematic diagram provided in an embodiment of the present invention.
In figure: 1, first group of screw rod；2, second group of screw rod；3, cord clip.
Specific embodiment
Invention is further described in detail with reference to the accompanying drawings and embodiments.
Shown in Figure 1, the embodiment of the present invention provides a kind of method for stretching for 3 screw rod of cord clip of suspension bridge, specific to wrap
Include following steps:
S1: being divided into two groups for screw rod all on cord clip 3 here, wherein first group has N1A screw rod, second group has N2A spiral shell
Bar calculates separately the average axle power F of first group of screw rod 1 and second group of screw rod 2 before tensioning1And F2；Due to each of on cord clip 3
Axle power that screw rod is subject to is different, so measure the axle power of each screw rod by ultrasound measuring instrument, then calculates first group of screw rod 1 and the
The average axle power F of two groups of screw rods 21And F2,
Specifically, according to formula
Calculate F1And F2, wherein f1、f2、…The axle power that first group of each screw rod of screw rod 1 measures respectively before tensioning, f
′1、f′2、…The axle power that second group of each screw rod of screw rod 2 measures respectively before tensioning.
According to the tensioning axle power for applying design axle power F simultaneously to screw rod all on cord clip 33, the compression for calculating main push-towing rope becomes
Shape amount Δ L, then an optional screw rod from screw rod all on cord clip 3 calculate stretcher strain amount Δ of the screw rod under F tensioning
L, in the present embodiment, F are the design axle power of screw rod.
Specifically, according to formula:
Δ L=L-L '
Wherein L is the main push-towing rope actual diameter for measure before tensioning to screw rod all on cord clip 3, and L ' is that N number of screw rod is same
When obtain main push-towing rope theoretical diameter after designing axle power F tensioning.
Specifically, according to formula；
Wherein lSpiral shellFor the nominal length of screw rod, dSpiral shellFor the nominal diameter of screw rod, E is the elastic force modulus of screw rod.
S2: N is applied to first group of screw rod 11The tensioning axle power of (F+ Δ F), according to first group of 1 quantity N of screw rod1, second group of spiral shell
2 quantity N of bar2, compression deformation Δ L, design axle power F and first group of 1 tensioning of screw rod of all screw rods in the case where designing axle power F tensioning
Preceding average axle power F1, calculate and N applied to first group of screw rod 11The increased compression of main push-towing rope after the tensioning axle power of (F+ Δ F)
Deflection Δ L1, wherein Δ F is that all screw rods are grouped tensioning to reach additional axle power required for design axle power.
Specifically, according to formula:
Calculate the increased compression deformation Δ L of main push-towing rope1。
N is being applied to first group of screw rod 11When the tensioning axle power of (F+ Δ F), second group of screw rod 2 loses an axle power, according to
Average axle power F before the tensioning of second group of screw rod 22, the stretcher strain amount Δ of screw design axle power F, any screw rod under F tensioning
The l and increased compression deformation Δ L of main push-towing rope1, calculate the average axle power F ' of second group of screw rod 22, F '2It is second group of screw rod 2
When one group of 1 tensioning of screw rod, the remaining average axle power of second group of screw rod 2.
Specifically, according to formula:
Calculate the average axle power F ' of second group of screw rod 22。
S3: N is applied to second group of screw rod 22The tensioning axle power of F, according to according to first group of 1 quantity N of screw rod1, second group of screw rod
2 quantity N2, all screw rods compression deformation Δ L, design axle power F in the case where designing axle power F tensioning and second group of screw rod 2 be averaged
Axle power F '2, calculate and N applied to second group of screw rod 22The increased compression deformation Δ L of main push-towing rope after the tensioning axle power of F2。
Specifically, according to formula:
Calculate Δ L2。
N is being applied to second group of screw rod 22When the tensioning axle power of F, first group of screw rod 1 loses an axle power, according to all spiral shells
Bar is grouped tensioning to reach additional axle power Δ F, screw design axle power F, any screw rod required for design axle power under F tensioning
The stretcher strain amount Δ l and increased compression deformation Δ L of main push-towing rope2, calculate the average axle power F ' of first group of screw rod 11, F '1It is first
Group screw rod 1 is in second group of 2 tensioning of screw rod, the remaining average axle power of first group of screw rod 1.
Specifically, according to formula:
Calculate the average axle power F ' of first group of screw rod1。
S4: according to formula F=F '1, all screw rod grouping tensioning are calculated to reach additional axle power required for design axle power
ΔF。
Specifically, according to formula
Calculate Δ F.
Method for stretching provided by the invention can make suspension cable by the way that the screw rod on cord clip of suspension bridge 3 is grouped tensioning
After the upper screw rod grouping tensioning of bridge cord clip 3, reaches the design axle power of requirement, avoid grouping tensioning and screw rod axle power is caused to divide again
With problem.In the present embodiment, it is more to can be adapted for screw rod number on cord clip of suspension bridge 3 for method for stretching provided by the invention
Situation is finally equal to design axle power F according to screw stretching axle powers all on known cord clip 3, cord clip of suspension bridge 3 can be calculated
Upper screw rod grouping tensioning reaches additional axle power Δ F required for design axle power F, it is only necessary to which former apply carries on first group of screw rod 1
Increasing Δ F on lotus F can make the screw rod for being grouped tensioning on cord clip 3 reach the design axle power F of screw rod, solve former cord clip
Screw rod occurs by grouping on 3 screw rod axle power reassigns problem, and the screw rod on cord clip 3 is made only to need to be grouped tensioning and once can
So that the screw rod on cord clip 3 reaches design axle power F, reduce the number of screw rod grouping tensioning on cord clip 3.
The present invention is not limited to the above-described embodiments, for those skilled in the art, is not departing from
Under the premise of the principle of the invention, several improvements and modifications can also be made, these improvements and modifications are also considered as protection of the invention
Within the scope of.The content being not described in detail in this specification belongs to the prior art well known to professional and technical personnel in the field.
Claims (9)
1. a kind of method for stretching for cord clip of suspension bridge screw rod, which is characterized in that this method comprises the following steps:
Screw rod all on cord clip is divided into two groups, wherein first group has N1A, second group has N2It is a, and calculate separately first group
With average axle power F of second group of screw rod before tensioning1And F2；
(N is applied simultaneously to screw rod all on cord clip1+N2) F tensioning axle power, the compression deformation Δ L of main push-towing rope is calculated, from rope
An optional screw rod in all screw rods on folder, calculating stretcher strain amount Δ l, F of the screw rod under F tensioning is the design of screw rod
Axle power；
N is applied to first group of screw rod1The tensioning axle power of (F+ Δ F), according to N1、N2, Δ L, F and F1, calculate the increased compression of main push-towing rope
Deflection Δ L1, Δ F is that all screw rods are grouped tensioning to reach additional axle power required for design axle power；
According to F2, F, Δ l and Δ L1, calculate the average axle power F ' of second group of screw rod2；
N is applied to second group of screw rod2The tensioning axle power of F, according to N1、N2, F, Δ L and F '2, calculate the increased compression deformation of main push-towing rope
ΔL2；
According to F, Δ L2, Δ l and Δ F, calculate the average axle power F ' of first group of screw rod1；
According to F=F '1, calculate Δ F.
2. the method as described in claim 1, which is characterized in that
According to formula:
Calculate the increased compression deformation Δ L of main push-towing rope1。
3. the method as described in claim 1, which is characterized in that
According to formula:
Calculate the average axle power F ' of second group of screw rod2。
4. the method as described in claim 1, which is characterized in that
According to formula:
Calculate Δ L2。
5. the method as described in claim 1, which is characterized in that
According to formula:
Calculate the average axle power F ' of first group of screw rod1。
6. method as claimed in claim 5, which is characterized in that
According to formula:
Calculate Δ F.
7. the method as described in claim 1, which is characterized in that according to formula:
WhereinThe respectively axle power that first group of each screw rod measures before tensioning,Point
It Wei not second group of each screw rod measures before tensioning axle power.
8. the method as described in claim 1, which is characterized in that
According to formula:
Δ L=L-L '
Wherein L is the main push-towing rope actual diameter for measure before tensioning to screw rod all on cord clip, and L ' is that N number of screw rod is being set simultaneously
Main push-towing rope theoretical diameter is obtained after meter shaft power F tensioning.
9. the method as described in claim 1, which is characterized in that
According to formula:
Wherein lSpiral shellFor the nominal length of screw rod, dSpiral shellFor the nominal diameter of screw rod, E is the elastic force modulus of screw rod.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910431076.2A CN110158476B (en) | 2019-05-22 | 2019-05-22 | Tensioning method for cable clamp screw of suspension bridge |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910431076.2A CN110158476B (en) | 2019-05-22 | 2019-05-22 | Tensioning method for cable clamp screw of suspension bridge |
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| CN110158476A true CN110158476A (en) | 2019-08-23 |
| CN110158476B CN110158476B (en) | 2020-09-15 |
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| CN201910431076.2A Active CN110158476B (en) | 2019-05-22 | 2019-05-22 | Tensioning method for cable clamp screw of suspension bridge |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113218554A (en) * | 2021-04-30 | 2021-08-06 | 黄光清 | Suspension bridge cable clamp screw axial force detection device and detection method thereof |
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| CN107620253A (en) * | 2017-10-20 | 2018-01-23 | 中交第四公路工程局有限公司 | Cord clip of suspension bridge fastener and method |
| CN107748031A (en) * | 2017-09-14 | 2018-03-02 | 中铁大桥科学研究院有限公司 | A kind of cord clip of suspension bridge screw rod axle power detection servicing unit and detection method |
| EP3388580A1 (en) * | 2017-04-11 | 2018-10-17 | Dywidag-Systems International GmbH | De-icing and icing prevention device for the jacket tube of a clamp member, clamp member with such a device and structure with at least one such clamp member |
| CN109487690A (en) * | 2018-10-12 | 2019-03-19 | 西南交通大学 | A kind of cable of the anti-skid cord clip of band pin joint rope clip pair and antiskid calculation method |
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2019
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Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| KR100930114B1 (en) * | 2009-05-22 | 2009-12-07 | 케이블텍 주식회사 | Apparatus for separating cables |
| EP3388580A1 (en) * | 2017-04-11 | 2018-10-17 | Dywidag-Systems International GmbH | De-icing and icing prevention device for the jacket tube of a clamp member, clamp member with such a device and structure with at least one such clamp member |
| CN107165050A (en) * | 2017-06-29 | 2017-09-15 | 中铁大桥科学研究院有限公司 | A kind of cord clip of suspension bridge screw rod axle power construction method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113218554A (en) * | 2021-04-30 | 2021-08-06 | 黄光清 | Suspension bridge cable clamp screw axial force detection device and detection method thereof |
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| CN110158476B (en) | 2020-09-15 |
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