CN100385201C - Method for monitoring large span bridge structural deflection - Google Patents
Method for monitoring large span bridge structural deflection Download PDFInfo
- Publication number
- CN100385201C CN100385201C CNB2003101084472A CN200310108447A CN100385201C CN 100385201 C CN100385201 C CN 100385201C CN B2003101084472 A CNB2003101084472 A CN B2003101084472A CN 200310108447 A CN200310108447 A CN 200310108447A CN 100385201 C CN100385201 C CN 100385201C
- Authority
- CN
- China
- Prior art keywords
- bridge
- steel pipe
- pressure
- water tank
- deflection
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Images
Landscapes
- Bridges Or Land Bridges (AREA)
Abstract
The present invention relates to a method for monitoring large span bridge structural safety monitoring system structural deflection. A water box, a water pipe and city water supply are used for establishing a complete bridge pressure field at first. The water box is arranged at the no displacement part of a bridge, the water pipe is horizontally arranged, and is water pressure is led to the deformation part of the bridge and is fixed with the detected part. The present invention uses a pressure transmitter to convert pressure change into the change of the deflection, and the change of the defection is monitored by a computer system. The present invention is provided with a monitoring system which is composed of the water tank, the water pipe, the pressure transmitter, an A/D convertor, a computer, etc. The present invention has the advantages of high measurement stability, large measurement range, low measurement cost and high practical value.
Description
Technical field
This invention belongs to the beam field of engineering technology, is specifically related to structural deflection monitoring (measurement) method in a kind of long-span bridge girder construction safety (health) monitoring system.
Background technology
The large bridge investment is huge, has a far reaching influence for social and economic development.In links such as Bridge Design, construction, operations, any small carelessness all may lead to heavy losses even catastrophic failure, gently then influences traffic, consumes a large amount of maintenance costs, and heavy then bridge is ruined the people and died, causes huge casualties and property loss.
Guaranteeing the security of long-span bridge beam operation phase, is a severe problem of whole world science of bridge building circle and governability authorities, also is simultaneously the general common problem in a management and the decision-making, has great society, economy, scientific meaning.Early 1990s abroad begin one's study safety (health) monitoring system of long-span bridge beam, bridge security (health) monitoring system is huge, complicated, a comprehensive technical system, and it comprises contents such as the evaluation of remote transmission, data storing and processing, structural safety state of collection in worksite, the data and instruction of crucial parameter measurement, the substantive test data of bridge key position and early warning.Bridge security (health) monitoring system mainly can be monitored and assess the Structure Safety for Bridge state, promptly by its structure and environmental information that in the bridge operation, is obtained, not only provide foundation and guidance for bridge inspection and maintenance, maintenance and management decision, also theoretical research and the test for bridge provides the most real first-hand information, so that theoretical model, structural design, the calculation assumption of checking bridge, and be used to feed back the improvement of instructing construction design method, construction technology and corresponding codes and standards etc.
The distortion of bridge structure is the most direct and one of safety index intuitively, and therefore the displacement (amount of deflection) of bridge structure monitoring often is listed in one of topmost monitoring content in bridge structure safe (health) monitoring system.The main means of monitoring displacement at present have video camera to add the method for grid target, method, photoelectricity amount of deflection sensor and the open method and the global position measurement system methods such as (GPS) together with pipe of infrared rays survey robot.Wherein the video camera method that adds the grid target once adopted in Britain in early days; The method of infrared rays survey robot was used in the Lupu Bridge in Shanghai monitoring system, this method exist require intervisibility, can not synchro measure, reflecting prism cleaning difficulty, robot measurement safeguard major defects such as difficulty; Photoelectricity amount of deflection sensor and open method together with pipe are used in the Yangtze Bridge safety monitoring system middle girder deflection metrology subsystem of Giant Buddha Temple, Chongqing, its major defect is that liquid level volatile and pollution, liquid inertia power cause liquid level instability etc., wherein topmost shortcoming is to provide surface level, influence attractive in appearance, and long-span bridge beam longitudinal gradient can't meet this requirement when big at all; Global position measurement system (GPS) need come location survey by satellite, has that precision is relatively poor, cost is high, is subjected to major defects such as external interference is big, measuring point is few.From the above mentioned, have influence on the development of structural safety (health) monitoring because of lacking of structural deflection monitoring method.
Summary of the invention
The objective of the invention is to propose that a kind of measurement stability is good, measurement range is big, measure the low The monitoring methods of long-span bridge deflection structure of cost, to overcome the shortcoming that present various monitoring method exists, satisfies the demand of actual engineering to the malformation monitoring.
The The monitoring methods of long-span bridge deflection structure that the present invention proposes is a kind of method of coming the monitoring of structures distortion by pressure measurement.Concrete scheme is as follows: at first utilize water tank, water pipe and common urban water supply to set up the full-bridge pressure field, it specifically is the place of bridge two ends invariant position, each fixes 1 water tank according to design height, with the steel pipe of a horizontal direction hydraulic pressure is set to the position that needs to measure distortion and fixing, steel pipe is out of shape with measured pontic; High-quality, high precision, highly sensitive pressure unit are arranged on the horizontal steel pipe on each measurement point, make the variation of this place's pressure convert the change of amount of deflection to; Pressure unit on each measurement point is connected with A/D converter with line concentrating case by cable, monitors in Surveillance center by computing system at last.Its principle of work is referring to shown in the accompanying drawing 1.Clearly owing to the measuring point that is arranged on the girder will be out of shape together along with structure, and be fixed in the water tank of invariant position and form Level Change between the liquid level, cause measuring point place pressure change, transmitter converts pressure to simulating signal, is converted to amount of deflection through acquisition system again and changes.
Advantage of the present invention is: (1) thus the measuring point place does not have that surface level liquid is not volatile, liquid level is difficult for polluting and liquid level is difficult for fluctuation (influencing measurement stability); (2) the water tank surface level is upper and lower in the deformation process can not change, thereby has improved measurement stability; (3) do not influence the bridge good looking appearance; (4) measurement range is big, and has permanance.
Description of drawings
Fig. 1 is a principle of work synoptic diagram of measuring bridge deformation with pressure field.
Fig. 2 is among the embodiment, and the data handling system of utilizing the inventive method to measure certain bridge shows the girder elevation change.
Number in the figure: 1 is water tank, and 2 is horizontal steel tube, and 3 is pressure unit, and 4 is stube cable, and 5 is line concentrating case, and 6 is A/D converter, and 7 for calculating monitoring system.
Embodiment
The The monitoring methods of long-span bridge deflection structure that the present invention proposes is on probation in the structural safety monitoring system of China's certain bridge of south.This bridge is a prestressed concrete cable-stayed bridge, 340 meters of main spans, and full-bridge is provided with 17 monitoring points respectively in the bridge floor upstream and downstream, 17 pressure units 3 should be arranged mutually.A reference point is set in addition again to consider the variation of water tank surface level.Water tank 1 adopts stainless steel material, is arranged at the bridge pier place of bridge main span.It is the galvanizing pipe of 50mm that horizontal steel tube 2 adopts internal diameter, is communicated with the bottom of water tank 1, is connected with pressure unit 3 in the monitoring point.The stube cable 4 of pressure unit adopts 2 * 32/0.2RVVP cable, and line concentrating case 5, A/D converter 6 are common equipment, and calculating monitoring system also is common system.Connect as shown in Figure 1.Through the operation of several months, prove that the inventive method is reliable, data are highly stable, avoided the common weakness of the monitoring system that in the past adopted, have very high practical value.Fig. 2 is the main beam deformation curve in about 14 o'clock of the 8 days October in 2003 of data processing software demonstration.
Claims (2)
1. The monitoring methods of long-span bridge deflection structure, it is characterized in that place at bridge two ends invariant position, each fixes 1 water tank according to design height, with the horizontal steel pipe of a horizontal direction hydraulic pressure is set to the position that needs to measure distortion and fixing, and steel pipe is out of shape with tested pontic; Pressure unit is arranged on each measurement point of horizontal steel pipe, makes the variation in water pressure at this place convert the change of amount of deflection to; Pressure unit on each measurement point is connected with A/D converter with line concentrating case by cable, monitors in Surveillance center by computer system at last.
2. long-span bridge girder construction flexiblity monitor system, it is characterized in that forming by water tank, steel pipe, pressure unit, cable, line concentrating case, A/D conversion, computer monitoring system, place at bridge two ends invariant position, according to design height 1 water tank is set respectively, the steel pipe horizontal direction is provided with, be communicated with water tank, and guide the position that needs to measure distortion on the bridge, fixing into, steel pipe is out of shape with tested pontic; Pressure unit is arranged on each measurement point of horizontal steel pipe, and is connected with A/D converter with line concentrating case by cable, is connected with computer monitoring system at last.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2003101084472A CN100385201C (en) | 2003-11-06 | 2003-11-06 | Method for monitoring large span bridge structural deflection |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2003101084472A CN100385201C (en) | 2003-11-06 | 2003-11-06 | Method for monitoring large span bridge structural deflection |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1542405A CN1542405A (en) | 2004-11-03 |
| CN100385201C true CN100385201C (en) | 2008-04-30 |
Family
ID=34334672
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2003101084472A Expired - Fee Related CN100385201C (en) | 2003-11-06 | 2003-11-06 | Method for monitoring large span bridge structural deflection |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN100385201C (en) |
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1948634B (en) * | 2006-04-19 | 2010-04-21 | 武汉岩海工程技术有限公司 | Method and device of measuring deflection settling of engineering structure body |
| CN101285729B (en) * | 2008-06-05 | 2010-04-21 | 天津大学 | Arch bridge deflection measuring apparatus |
| CN101451903B (en) * | 2008-12-26 | 2010-06-23 | 中铁大桥局集团武汉桥梁科学研究院有限公司 | Semi-closed single communication pipe type bridge deflection test device and method |
| CN101979974B (en) * | 2010-09-07 | 2011-12-21 | 东南大学 | Method for monitoring full-court stress of power transmission tower |
| CN103292774B (en) * | 2013-05-31 | 2016-04-13 | 广州大学 | A kind of dynamic deflection metrology method of bridge |
| CN104567641B (en) * | 2015-01-06 | 2017-08-08 | 长安大学 | A kind of Short/Medium Span Bridge deflection measuring apparatus |
| CN105716511B (en) * | 2016-03-31 | 2018-11-30 | 西南交通大学 | Bridge static loading test amount of deflection dial gauge measures attachment device |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0318268A2 (en) * | 1987-11-25 | 1989-05-31 | Heerema Engineering Service B.V. | Deflection measurement |
| US4894924A (en) * | 1986-11-07 | 1990-01-23 | Ishikawajima Kensa Keisoku Kabushiki Kaisha | Method for measuring level of large structure |
| CN2107639U (en) * | 1991-11-23 | 1992-06-17 | 崔碧海 | Digital communicating pipe level gauge |
| JPH05272951A (en) * | 1991-04-02 | 1993-10-22 | Hitachi Zosen Corp | Displacement gage |
| JPH10227633A (en) * | 1997-02-13 | 1998-08-25 | Ishikawajima Inspection & Instrumentation Co | Measuring device of shape of bridge |
-
2003
- 2003-11-06 CN CNB2003101084472A patent/CN100385201C/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4894924A (en) * | 1986-11-07 | 1990-01-23 | Ishikawajima Kensa Keisoku Kabushiki Kaisha | Method for measuring level of large structure |
| EP0318268A2 (en) * | 1987-11-25 | 1989-05-31 | Heerema Engineering Service B.V. | Deflection measurement |
| JPH05272951A (en) * | 1991-04-02 | 1993-10-22 | Hitachi Zosen Corp | Displacement gage |
| CN2107639U (en) * | 1991-11-23 | 1992-06-17 | 崔碧海 | Digital communicating pipe level gauge |
| JPH10227633A (en) * | 1997-02-13 | 1998-08-25 | Ishikawajima Inspection & Instrumentation Co | Measuring device of shape of bridge |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1542405A (en) | 2004-11-03 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US7895015B2 (en) | Method for measuring the structural health of a civil structure | |
| US8209134B2 (en) | Methods for modeling the structural health of a civil structure based on electronic distance measurements | |
| CN110485737A (en) | A kind of Elements of Space Grid Truss location and installation construction method based on BIM technology | |
| CN111335186A (en) | Safety monitoring and early warning method and system for swivel bridge, storage medium and early warning platform | |
| CN103017672A (en) | Non-contact nondestructive testing method for bridge structure | |
| CN100385201C (en) | Method for monitoring large span bridge structural deflection | |
| CN110987057A (en) | Hydraulic pressure is automatic monitoring system in high in clouds for creeping formwork | |
| CN111749447A (en) | Tall and big space fastener type full scaffold monitoring structure and monitoring method | |
| CN112556903A (en) | Tower material all-state monitoring and analyzing method | |
| CN115983649A (en) | Water conservancy wisdom building site system | |
| CN113218364B (en) | House building safety monitoring system based on optical fiber sensing technology | |
| Cartiaux et al. | Traffic and temperature effects monitoring on bridges by optical strands strain sensors | |
| CN113447067A (en) | Monitoring method of construction monitoring system of reinforced concrete combined section | |
| Wang et al. | The Long-Term Settlement Deformation Automatic Monitoring System for the Chinese High-Speed Railway. | |
| Li et al. | Model test research on arch dam displacement monitoring based on distributed strain sensing | |
| CN218895288U (en) | Pipeline strides across healthy and safety monitoring device of structure | |
| Wimmer et al. | Permanent Structural Health Monitoring of a new prestressed concrete bridge | |
| Wang et al. | Measuring Behavior of Long-Span Bridges During Erection: Case Study of the Governor Mario M. Cuomo Bridge | |
| Ye et al. | Design of deformation monitoring system of arch rib of steel arch bridge based on inclination | |
| Qin et al. | Overview and prospect of dam deformation monitoring technology | |
| Tu | Research on measuring instrument of bridge building bearing capacity based on computer BIM technology | |
| Hao et al. | Application Analysis of Strain Monitoring Technology Based on Optical Time Domain Reflection in Fiber Optic Sensor Networks | |
| CN214879682U (en) | Gantry crane foundation monitoring system for river-crossing bridge construction | |
| Gao et al. | Application and Research of Health Monitoring System of Xiangshan Port Bridge | |
| CN214893403U (en) | Construction monitoring system of reinforced concrete joint section |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| EE01 | Entry into force of recordation of patent licensing contract |
Assignee: Xiamen Construction Engineering Testing Center Co., Ltd. Assignor: Tongji University Contract fulfillment period: 2008.10.28 to 2013.10.28 contract change Contract record no.: 2008310000271 Denomination of invention: Method for monitoring large span bridge structural deflection Granted publication date: 20080430 License type: Exclusive license Record date: 20081211 |
|
| LIC | Patent licence contract for exploitation submitted for record |
Free format text: EXCLUSIVE LICENSE; TIME LIMIT OF IMPLEMENTING CONTACT: 2008.10.28 TO 2013.10.28; CHANGE OF CONTRACT Name of requester: XIAMEN CITY CONSTRUCTION PROJECT CONSULTING DETECT Effective date: 20081211 |
|
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20080430 Termination date: 20131106 |