CN103954415A - Method for measuring deflection of dry bridge - Google Patents
Method for measuring deflection of dry bridge Download PDFInfo
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- CN103954415A CN103954415A CN201410165105.2A CN201410165105A CN103954415A CN 103954415 A CN103954415 A CN 103954415A CN 201410165105 A CN201410165105 A CN 201410165105A CN 103954415 A CN103954415 A CN 103954415A
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- deflection
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Abstract
The invention discloses a method for measuring the deflection of a dry bridge. According to the method, measuring equipment (a steel strand, a counter weight and a displacement meter) is hung on the measuring section of a bridge superstructure to achieve the purpose of measuring the deflection of the bridge superstructure. According to the method for measuring the deflection of the dry bridge, applied devices are simple, implementation cost is low, mounting operation is quite convenient to carry out, and the measuring precision of the measuring method depends on the precision of the displacement meter and can reach a submillimeter level.
Description
Technical field
The invention belongs to the viaduct loading test detection technique field of not crossing over waters, relate in particular to a kind of method of measuring viaduct amount of deflection.
Background technology
For meeting the requirement of highway alignment curve, the viaduct of construction is more and more, for grasping the technology status of this class bridge, often adopts loading test to judge its load-bearing capacity, and when test, the amount of deflection of superstructure is one of very important basis for estimation.When Test on Bridge Loading, except the amount of deflection of large-span steel case beam suspension bridge is larger, can use outside total powerstation measures, particularly viaduct of conventional bridge, considers from economic angle, can be very not large across footpath, so amount of deflection is all less when test, measuring accuracy requires to reach submillimeter level.At present, reach precision like this generally adopts communicating pipe spirit-leveling instrument, precision level, displacement meter to measure.
Communicating pipe, spirit-leveling instrument required reference point and measuring point substantially will be maintained at the same horizontal plane, if arch bridge need to be measured the amount of deflection of main arch ring, main arch ring is warp architecture, and the discrepancy in elevation is larger, can not meet this requirement, cannot use communicating pipe spirit-leveling instrument to measure its amount of deflection; And communicating pipe spirit-leveling instrument installation is cumbersome, each measuring point needs base, in some bridge structure to be measured, cannot install.
Use precision level to measure amount of deflection, the scale of measuring point and instrument collimation axis are strict with in same level, and some viaduct is built on very steep hillside, can not find the place that is applicable to setting up spirit-leveling instrument, thereby cannot use precision level to measure.
Using displacement meter to measure viaduct amount of deflection is to set up testing jig from bridge below, and shelf extends to from structure measuring point 15cm, and displacement meter is installed on the top of the shelf, and pointer props up structure measuring point.But, set up testing jig expense very high, and time-consuming.
Summary of the invention
The technical problem to be solved in the present invention is to provide a kind of method that application apparatus is simple, fitting operation is measured viaduct amount of deflection easily.
For solving the problems of the technologies described above, the present invention by the following technical solutions: measure the method for viaduct amount of deflection, undertaken by following operation: at steel strand wires of testing section suspention of bridge superstructure, steel strand wires lower end hangs a weight tightens steel strand wires; Weight side binding displacement meter, displacement meter pointer is conflicted on billet; Billet firmly sticks in pre-buried concrete pad; When test loads, the variable quantity that displacement meter records is the deflection value Δ of superstructure measuring point.
Steel strand wires nominal diameter is not more than 5.0mm; Weight bottom is apart from the about 15cm of its lower horizontal billet, and weight weight is 8～12 times of suspention steel strand wires weight, and is not less than 5.0kg; Billet is of a size of 10cm × 10cm, and thickness is 5mm; Concrete pad sectional dimension 25cm × 25cm.
Steel strand wires nominal diameter is 3.0mm.
Have the problem such as application apparatus complexity, fitting operation difficulty for the method for traditional measurement viaduct amount of deflection, inventor has set up a kind of method of measuring viaduct amount of deflection.This method is utilized in the testing section suspention of bridge superstructure and is measured equipment (steel strand wires, weight, displacement meter), realizes the object of measuring viaduct superstructure amount of deflection.Application apparatus of the present invention is simple, and implementation cost is cheap, and fitting operation is very convenient, and the measuring accuracy of its measuring method depends on the precision of displacement meter, can reach submillimeter level completely.
Brief description of the drawings
Fig. 1 is bridge structure elevational schematic view.
Fig. 2 is the mounting arrangements enlarged diagram of measurement mechanism in Fig. 1.
In figure: Bridge 1 girder construction; Bridge structure after 2 load deflections; 3 amount of deflection measuring points; 4 grounds; 5 steel strand wires; 6 weights; 7 displacement meters; 8 displacement meter pointers; 9 billets; 10 concrete pad.
Embodiment
Set up the method (Fig. 1 to Fig. 2) of measuring viaduct amount of deflection
(nominal diameter is not more than 5.0mm to suspend steel strand wires in midair at the testing section of bridge superstructure, first-selected 3.0mm), steel strand wires lower end hangs a weight (weight is 8～12 times of suspention steel strand wires weight, and is not less than 5.0kg) tightens steel strand wires; Weight bottom is apart from the about 15cm of its lower horizontal billet, and weight side bundlees displacement meter (accuracy requirement is not less than 0.01mm), and displacement meter pointer is conflicted on billet (be of a size of 10cm × 10cm, thickness is 5mm); Billet firmly sticks in pre-buried concrete pad (sectional dimension 25cm × 25cm); When test loads, the variable quantity that displacement meter records is the deflection value Δ of superstructure measuring point.
Embodiment 1
According to the measuring method of above-mentioned foundation, certain box arch bridge main arch ring spaning middle section is measured.
First ready work, is shown in and on the testing section of drafting, installs and measures device according to Fig. 1 and Fig. 2; Prepare counterweight truck as testing with adding loads.
Test ready after, start load before, the acquisition system of having debugged displacement meter, makes the zero setting of displacement meter reading.Then, according to pre-prepd weight, bridge floor is loaded, after bridge structure stabilization, read displacement meter numerical value (5.02mm), the deflection value Δ of this box arch bridge main arch ring spaning middle section is 5.02mm.
Claims (3)
1. measure a method for viaduct amount of deflection, it is characterized in that being undertaken by following operation: at steel strand wires of testing section suspention of bridge superstructure, steel strand wires lower end hangs a weight tightens steel strand wires; Weight side binding displacement meter, displacement meter pointer is conflicted on billet; Billet firmly sticks in pre-buried concrete pad; When test loads, the variable quantity that displacement meter records is the deflection value Δ of superstructure measuring point.
2. the method for measurement viaduct amount of deflection according to claim 1, is characterized in that: described steel strand wires nominal diameter is not more than 5.0mm; Described weight bottom is apart from the about 15cm of its lower horizontal billet, and weight weight is 8～12 times of suspention steel strand wires weight, and is not less than 5.0kg; Described billet is of a size of 10cm × 10cm, and thickness is 5mm; Described concrete pad sectional dimension 25cm × 25cm.
3. the method for measurement viaduct amount of deflection according to claim 2, is characterized in that: described steel strand wires nominal diameter is 3.0mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410165105.2A CN103954415A (en) | 2014-04-21 | 2014-04-21 | Method for measuring deflection of dry bridge |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410165105.2A CN103954415A (en) | 2014-04-21 | 2014-04-21 | Method for measuring deflection of dry bridge |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103954415A true CN103954415A (en) | 2014-07-30 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
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| CN201410165105.2A Pending CN103954415A (en) | 2014-04-21 | 2014-04-21 | Method for measuring deflection of dry bridge |
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| CN (1) | CN103954415A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105588764A (en) * | 2016-01-26 | 2016-05-18 | 贵州大学 | Method and device for simply and conveniently detecting strength of building steel |
| CN106152988A (en) * | 2016-07-25 | 2016-11-23 | 上海同丰工程咨询有限公司 | A kind of small bridge safety remote monitoring device and method thereof |
| CN108693327A (en) * | 2018-04-11 | 2018-10-23 | 天津大学 | A kind of experiment test platform of simulation tomography down tube soil interaction |
| CN108956934A (en) * | 2018-04-11 | 2018-12-07 | 天津大学 | A kind of experimental test procedures for simulating tomography down tube soil interaction |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1995002099A1 (en) * | 1993-07-09 | 1995-01-19 | Forschungszentrum Jülich GmbH | Reinforcement for building elements under tension and installations provided therewith |
| JP2002090256A (en) * | 2000-09-20 | 2002-03-27 | Higashikanto:Kk | Evaluation method for soundness degree using dimensionless rigidity ratio of concrete floormboard |
| CN101055218A (en) * | 2007-05-29 | 2007-10-17 | 重庆交通大学 | Bridge flexibility and displacement monitoring device and monitoring method |
| CN201935794U (en) * | 2010-12-23 | 2011-08-17 | 北京新智交科科技开发有限公司 | Deflection detector |
| CN202599633U (en) * | 2012-03-26 | 2012-12-12 | 中国铁道科学研究院铁道建筑研究所 | Bridge deflection test instrument |
-
2014
- 2014-04-21 CN CN201410165105.2A patent/CN103954415A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1995002099A1 (en) * | 1993-07-09 | 1995-01-19 | Forschungszentrum Jülich GmbH | Reinforcement for building elements under tension and installations provided therewith |
| JP2002090256A (en) * | 2000-09-20 | 2002-03-27 | Higashikanto:Kk | Evaluation method for soundness degree using dimensionless rigidity ratio of concrete floormboard |
| CN101055218A (en) * | 2007-05-29 | 2007-10-17 | 重庆交通大学 | Bridge flexibility and displacement monitoring device and monitoring method |
| CN201935794U (en) * | 2010-12-23 | 2011-08-17 | 北京新智交科科技开发有限公司 | Deflection detector |
| CN202599633U (en) * | 2012-03-26 | 2012-12-12 | 中国铁道科学研究院铁道建筑研究所 | Bridge deflection test instrument |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105588764A (en) * | 2016-01-26 | 2016-05-18 | 贵州大学 | Method and device for simply and conveniently detecting strength of building steel |
| CN105588764B (en) * | 2016-01-26 | 2018-04-20 | 贵州大学 | The method and device of simplicity detection structural steel intensity |
| CN106152988A (en) * | 2016-07-25 | 2016-11-23 | 上海同丰工程咨询有限公司 | A kind of small bridge safety remote monitoring device and method thereof |
| CN108693327A (en) * | 2018-04-11 | 2018-10-23 | 天津大学 | A kind of experiment test platform of simulation tomography down tube soil interaction |
| CN108956934A (en) * | 2018-04-11 | 2018-12-07 | 天津大学 | A kind of experimental test procedures for simulating tomography down tube soil interaction |
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Application publication date: 20140730 |
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| RJ01 | Rejection of invention patent application after publication |