CN106767664B - Large Span Bridges deformation method of real-time based on dipper system - Google Patents
Large Span Bridges deformation method of real-time based on dipper system Download PDFInfo
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B21/00—Measuring arrangements or details thereof, where the measuring technique is not covered by the other groups of this subclass, unspecified or not relevant
- G01B21/32—Measuring arrangements or details thereof, where the measuring technique is not covered by the other groups of this subclass, unspecified or not relevant for measuring the deformation in a solid
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Abstract
The present invention provides a kind of Large Span Bridges deformation method of real-time based on dipper system, including data acquisition；Data processing: cloud computation data center is based on cloud computing environment and successively carries out difference processing and filtering processing to initial data, realize the real-time resolving to initial data, bridge deformation data after being resolved, and the bridge deformation data by initial data and after resolving are stored into database respectively；Data storage and management.This method in real time, accurately picks up the parameter of the certain parts and entirety of its structure when bridge deformation is abnormal, through BEI-DOU position system, identifies its feature different from normal condition, to determine the position damaged and opposite degree, makes assessment and early warning；And by the long-term observation to deformation sensitive features amount, the development law for grasping bridge performance deterioration extends the service life of bridge to dispose corresponding Improving Measurements.By the use of Beidou location and navigation technology, the accuracy of monitoring and the reliability of forecast assessment can greatly improve.
Description
Technical field
The invention belongs to beam bridge deformation real-time monitoring system technical fields, and in particular to it is a kind of based on dipper system it is big across
Diameter bridge deformation method of real-time.
Background technique
Currently, Major Diseases are the excessive downwarp of span centre, weakened web, bottom during long-span continuous beam bridge operation both at home and abroad
The deformation phenomenon such as plank split.The method and instrument behaviour that the country largely uses the acquisition of the deformation data such as continuous bridge middle span deflexion
Work optical measuring method, connection tube method, method of tension wire alignment, video are surveyed as method and total station, accelerograph, laser interferometer, deformeter
Deng.These methods and instrument have its respective advantage and disadvantage, but there are the degree of automation low, heavy workload, observe vulnerable to weather
It with the influence of other external conditions, is easy to leak through important and dangerous signal, and data acquisition can not synchronize in time and wait offices
It is sex-limited.
The existing bridge health monitoring system built up mostly uses greatly satellite positioning tech to distortion measurements such as displacements.Practical work
In journey application practice, it is mainly used on the Long spans bridge complex such as cable-stayed bridge and suspension bridge, and in long-span continuous beam bridge
It is almost nil using less.
There are some comparisons in the monitoring of long-span continuous beam bridge promotes and applies for the existing bridge health monitoring system built up
Universal problem: monitoring and test content is more in existing health monitoring systems, not special specifically for big Span Continuous beam bridge stress
Property be designed, also without the monitoring system developed for long-span continuous beam bridge deformation monitoring；Most health monitoring systems
The GPS positioning system that displacement measurement uses is restricted and data since GPS system is U.S.'s developmental research there are key technology
Safety risks problem；Partial Bridges health monitoring systems be not designed by bridge professional or these designers lack
Weary bridge machinery abundant leads to system point layout scale difference so that the laying of its measuring point is not reasonable with assessment experience
Property is larger, and critical data is caused to lack；The all types of sensor of system are various, obtain mass data, but connect with Long span
Continuous beam bridge Major Diseases are unrelated, cause data are various to be difficult to handle, and intuitive effective decision cannot be provided for Bridge Management & Maintenance personnel
Foundation causes investment waste simultaneously；A large amount of sensor life-times and transmission line long-time service directly result in monitoring system service life
It is shorter, service efficiency is difficult to be guaranteed；Health monitoring systems are huge, one-time construction somewhat expensive, it is difficult to popularity.
Summary of the invention
The present invention provides a kind of based on dipper system to solve drawbacks described above and deficiency existing in the prior art
Large Span Bridges deformation method of real-time.
In order to solve the above technical problems, the present invention provides a kind of Large Span Bridges deformation real-time monitoring based on dipper system
Method, it is characterised in that:
Data acquisition: bridge initial data is acquired by Beidou ground strengthening system and Beidou bridge deformation monitoring station, then
By wired fiber optic network, wired internet or wireless network transmissions to cloud computation data center, and by cloud computation data center
Carry out Data Analysis Services and storage；Wherein, Beidou bridge deformation monitoring station is divided into deflection monitoring according to the difference of setting position
Stand, bridge pier differential settlement monitoring station and expansion joint displacement feature monitoring station, Beidou bridge deformation monitoring station include Beidou antenna,
Receiver and lightning protection, Beidou ground strengthening system include base station, System Control Center and subscriber data center；
Data processing: cloud computation data center is based on cloud computing environment and successively carries out difference processing and filtering to initial data
Processing, realizes the bridge deformation data to the real-time resolving of initial data, after being resolved, and will be after initial data and resolving
Bridge deformation data are stored into database respectively；
Data storage and management:
1) database based on on-line analytical processing is used, data management is carried out, realizes and particular analysis demand is carried out
On line data access, meanwhile, in order to accelerate the storage searching and managing to data, and break through the limitation of system file size, data
Storage is using data grouping and divides table technology；
2) data are backed up using secondary data redundancy technique, with the complete backup and difference on database server
Backup is backed up as the first order, is backed up by the second level of the compress backup on remote data backup server, wherein the first order is standby
Part uses database maintenance technology, carries out weekly complete backup to data, differential backup once a day, not to backup
Data use compressed package, the size of Backup Data is reduced to the 30% of original backup file size, second level backup uses
Xcopy command techniques, will be on the data remote transmission that backed up on database server to another backup server；
3) data warehouse is constructed, detailed process includes Conceptual Model Design, logic model design and design of physical model,
In, Conceptual Model Design includes that conceptual model demand analysis and subject area determine that logic model design includes that system data amount is estimated
It calculates, granularity model design, data-splitting strategy design and metadata schema design, design of physical model include determining storage knot
Structure determines index structure, carries out merger to table and optimization storage distribution；If optimization storage distribution obtains result as single theme
Repeat logic model design and design of physical model process；Data in data warehouse are cleared up and extracted, construct all kinds of points
Theme is analysed, is shown by the way that data analysis application is integrated；
Data analysis application is integrated: data processed result shows that data analysis is answered by data analysis application integrated software
It include that PC browser and smart phone APP, PC browser pass through the software offer interface based on B/S framework, intelligence with integrated software
Energy cell phone application, is realized by wechat platform, and the compatible Android and IOS system of data analysis application integrated software；Specific packet
Include: GIS map integrates more bridge block monitoring management modules, Real-time Monitoring Data and the inquiry of historical data module, and multistage early warning is set
It sets, analyze and reminding module, big data analysis bridge deformation sends rule of development module, automatically generates bridge deformation monitoring report
Module, user monitor configuration module and data download module.
Further, the Real-time Monitoring Data and the inquiry of historical data module include the real-time song of bridge deformation monitoring data
Line display module, absolute elevation and relative deformation's data and curves analysis module, draw according to the amount of deflection measuring point being distributed on bridge
The linear module of full-bridge processed, multistage early warning envelope analysis module, the inquiry of historical data module and data downloading.
Further, multistage early warning setting, analysis and reminding module pass through analysis of bridge structure and deformation monitoring historical data
Statistics, is arranged the threshold value of each distortion monitoring points, the backstage Warning Service program of cloud computation data center is arranged according to setting
Threshold value carry out differentiation of transfiniting automatically, and will transfinite information write-in database and short message warning table in, in PC browser and intelligence
Cell phone application, which can view threshold value, to transfinite information, and it is disposed and is closed；At the same time, the information that transfinites can be automatic
Sort out, and send different threshold values to the user of different levels respectively by way of short message and mail to transfinite information.
Further, the deformation monitoring that configuration module increases certain bridge block is monitored by user, user monitors configuration module master
It to be configured including monitoring type configuration, monitoring cross section configuration, monitoring point configuration and detection page operating parameter, wherein monitoring type
Configuration is managed different deformation type parameters, and deformation type parameter includes amount of deflection, bridge pier sedimentation and expansion joint displacement, prison
Surveying cross-sectional configurations is managed to bridge sectional position information where deformation point layout, and multiple measuring points are arranged in a section
Integrated management, monitoring point configuration are that the position to section where monitoring point, a reference value, practical photograph information are managed, and right
Monitoring point storage mode and location information are managed.
Further, in data processing step, bridge deformation is abnormal using real-time kinematical RTK mensuration and is a little determined
It on the other hand, is used specifically, on the one hand subscriber computer obtains observation data and navigation message by baseband signal processing module position
Family machine waits the carrier phase difference correction of base station, after receiving the carrier phase difference correction from base station,
It applies carrier phase differential positioning to resolve together with navigation message this carrier phase difference correction, initial data, is determined
Position result；
Baselines process includes: the reading of initial data；Initial data is being read in the inspection and modification of initial data
Afterwards, it needs to check initial data, inspection item includes that monitoring station name, monitoring point number, monitoring station coordinates and antenna are high；
The determination of Baselines control parameter, Baselines control parameter are used to determine that processing method carries out Baselines；Baselines；
The inspection of base line quality after Baselines, tests to baseline, if unqualified, is resolved again or again
Initial data is acquired, the inspection of base line quality includes that RATIO, RDOP, RMS, synchronous ring close and poor, asynchronous loop is closed and poor
And repetitive baseline is poor；
Further, it is to determine the integer ambiguity of starting, integer ambiguity using the key of real-time kinematical RTK mensuration
Determination method it is as follows:
1) the fuzziness float-solution with website coordinate outline known constraints is added to solve；
2) several groups fuzziness is searched out using LAMBDA method；
3) several groups fuzziness is checked according to the difference of residual sum of squares (RSS), baseline length difference and pitch angle, it is final to determine
Best fuzziness out.
Further, after determining best fuzziness, if solving bridge deformation amount calculated result using carrier phase observation data
Required precision is not achieved, then improves the precision of bridge deformation amount calculated result by the following method:
(1) Gross postionning and detection are carried out using the correlation of error；
(2) small Detection of Gross Errors is carried out using difference between epoch；
(3) data of multiple epoch carry out overall adjustment, analyze residual error, carry out determining power to initial data again,
Then adjustment solves baseline component, the precision of baseline component is improved, to improve bridge deformation amount computational accuracy.
Further, data processing further includes preprocessing process, and preprocessing process includes singular value rejecting, data reparation, spy
Value indicative is extracted and Error processing, in error procedure, rejects gross error first, reprocesses random error, last processing system
System error.
Present invention advantageous effects achieved: the Large Span Bridges deformation monitoring method based on dipper system, in bridge
When beam deformation is abnormal, the parameter of the certain parts and entirety of its structure in real time, is accurately picked up by BEI-DOU position system,
It identifies its feature different from normal condition, to determine the position damaged and opposite degree, makes assessment and early warning；And pass through
Long-term observation to deformation sensitive features amount, the development law for grasping bridge performance deterioration are prolonged with disposing corresponding Improving Measurements
The service life of long bridge.By the use of Beidou location and navigation technology, the accuracy and prediction of monitoring can greatly improve
The reliability of assessment.
Detailed description of the invention
The carrier phase real time differential work flow diagram of Fig. 1 present invention；
The carrier phase differential positioning subscriber computer work flow diagram of Fig. 2 present invention；
Fig. 3 carries out amount of deflection measured data curve comparison figure before and after data prediction；
Fig. 4 data warehouse constructs block diagram；
The main bridge box beam of Fig. 5 embodiment 1 deforms point layout structure chart；
Comparison when Fig. 6 embodiment 2 is using the deck-molding journey of the bridge after the method for the present invention measurement completion 13 years and at bridge is bent
Line chart.
Specific embodiment
The invention will be further described below in conjunction with the accompanying drawings.Following embodiment is only used for clearly illustrating the present invention
Technical solution, and not intended to limit the protection scope of the present invention.
The present invention uses the Large Span Bridges deformation real-time monitoring system based on dipper system, is abnormal in bridge deformation
When, the parameter of the certain parts and entirety of its structure in real time, is accurately picked up by BEI-DOU position system, identifies itself and normal shape
The different feature of state makes assessment and early warning to determine the position damaged and opposite degree；And by deformation sensitive features
The development law of bridge performance deterioration is grasped in the long-term observation of amount, and to dispose corresponding Improving Measurements, extend bridge uses the longevity
Life.By the use of Beidou location and navigation technology, the accuracy of monitoring and the reliability of forecast assessment can greatly improve.It should
Monitoring system includes data collection layer, data transfer layer, data center's layer, analysis four layer architecture of application layer.
Data collection layer.It mainly include Beidou ground strengthening system and Beidou bridge deformation monitoring station.The enhancing of Beidou ground
System is made of subsystems such as base station, System Control Center, subscriber data center.Beidou bridge deformation monitoring station mainly includes
Beidou antenna, receiver, lightning protection etc..Beidou bridge deformation monitoring point can be divided into deflection monitoring according to the difference of position
It stands, bridge pier differential settlement monitoring station, expansion joint displacement feature monitoring station etc..
Data transfer layer.The big-dipper satellite initial data of data collection layer acquisition is transferred to bridge shape by data transfer layer
Become monitoring center.Data transfer layer mainly includes bridge field monitor network, telecom operators' fiber broadband, bridge deformation monitoring
Application network.
Data center's layer.Big-dipper satellite data real-time resolving and bridge deformation monitoring data are carried out based on cloud computing environment
Storage.Big-dipper satellite data real-time resolving software obtains big-dipper satellite initial data (carrier phase and pseudorange), carries out difference to it
Divide processing and filtering.Bridge deformation monitoring data storage content includes initial data, resolved data, warning data, health status
Information.
Analyze application layer.On the basis of data analysis layer, by platform building collocation type agile development, rapid build towards
Bridge deformation monitors application platform.Platform application specific form be it is various, can be browser model or client mode,
It can also be mobile device mode.
Large Span Bridges deformation method of real-time provided by the invention based on dipper system, specifically includes:
Data acquisition: bridge initial data is acquired by Beidou ground strengthening system and Beidou bridge deformation monitoring station, then
By wired fiber optic network, wired internet or wireless network transmissions to cloud computation data center, and by cloud computation data center
Carry out Data Analysis Services and storage；Wherein, Beidou bridge deformation monitoring station is divided into deflection monitoring according to the difference of setting position
Stand, bridge pier differential settlement monitoring station and expansion joint displacement feature monitoring station, Beidou bridge deformation monitoring station include Beidou antenna,
Receiver and lightning protection, Beidou ground strengthening system include base station, System Control Center and subscriber data center；
Data processing: cloud computation data center is based on cloud computing environment and successively carries out difference processing and filtering to initial data
Processing, realizes the bridge deformation data to the real-time resolving of initial data, after being resolved, and will be after initial data and resolving
Bridge deformation data are stored into database respectively；
It is switched on after completing the installation of geodetic type difference subscriber computer, at this point, it is to carry that difference operating mode can be arranged by handbook
Receiver can also be defaulted difference modes and be set as carrier phase real time differential mode, after booting by wave phase real time differential mode
Automatically into the mode.Bridge deformation is abnormal using real-time kinematical RTK mensuration and is a little positioned, specifically, user
On the one hand machine obtains initial data and navigation message by baseband signal processing module, on the other hand, subscriber computer waits base station
Carrier phase difference correction, after receiving the carrier phase difference correction from base station, by this carrier phase difference
Divide correction, initial data to apply carrier phase differential positioning to resolve together with navigation message, obtains positioning result；Such as Fig. 1-2
It is shown.
Dipper system and GPS system have been all made of Code Division Multiple Access, and frequency is close, facilitates at multifrequency fuzziness
Reason；Broadcast ephemeris content uses orbit parameter, similar to GPS system；Time system differs fixed value, coordinate system with GPS system
System only exists cm grades of differences with GPS system, is easy normalization data processing.Therefore, it can be realized using GPS/BD observation data double
Compatible resolving that system RTK is seamless, hence it is evident that shorten RTK initialization time, improve the positioning accuracy of RTK.
Dipper system is that the practical satellite navigation system of first three frequency, three frequencies are more according to being conducive to carry out in the world
Observation combination resolves, and more effectively eliminating ionosphere delay influences, and reduces the initialization time of RTK, increase the effect of RTK away from
From.
The GEO satellite position of dipper system is relative to geostationary, and satellite-signal is often easiest to capture, and IGSO is defended
Star is secondly, MEO satellite is most difficult to capture.It therefore, is MEO satellite compared to GPS system satellite, the satellite-signal of BD system more holds
Easily capture, to reduce receiver to the locking time of satellite.
Baselines process includes: the reading of initial data, when carrying out Baselines, it is necessary first to read original number
According to.Data processing software can directly handle initial data, or initial data is formatted.Currently, most common
Format is RINEX format, and for the data by the storage of such format, most data processing software can be handled directly；It is former
The inspection and modification of beginning data need to check initial data after reading in initial data, and inspection item includes monitoring station
Title, monitoring point number, monitoring station coordinates and antenna are high；The determination of Baselines control parameter, Baselines control parameter are used to
Determine that processing method carries out Baselines, one very important ring when the control parameter for setting Baselines is Baselines
Section, by the setting of control parameter, may be implemented the refined processing of baseline；Baselines, the process of Baselines are usually certainly
Dynamic progress, without excessive manual intervention；The inspection of base line quality, after Baselines, baseline results can not be at once
For subsequent processing, it is necessary to test to the quality of baseline, only up-to-standard baseline could be used for subsequent number
It is resolved if unqualified according to processing or initial data is acquired again again, the inspection of base line quality includes
RATIO, RDOP, RMS, synchronous ring close and poor, asynchronous loop is closed and poor and repetitive baseline is poor；
It is to determine the integer ambiguity of starting using the key of real-time kinematical RTK mensuration, according to use environment and spy
Point determines method using with the fuzziness assisted known to website coordinate outline, carries out quick fuzziness and determines, method
It is as follows:
1) the fuzziness float-solution with website coordinate outline known constraints is added to solve；
2) several groups fuzziness is searched out using LAMBDA method；
3) several groups fuzziness is checked according to the difference of residual sum of squares (RSS), baseline length difference and pitch angle, it is final to determine
Best fuzziness out.
This method has the advantages that speed is fast, high reliablity.According to test, under conditions of 5 observation satellites, single epoch
The probability of integer ambiguity is successfully determined 90% or more, substantially accelerates the convergence time of deformation quantity calculating.
Bridge deformation monitoring is very high to the requirement of deformation quantity computational accuracy, and only fuzziness is determined correctly, directly utilizes and carries
Wave phase observation solve and is difficult to reach required precision.It is calculated for this purpose, following means can be used to improve final deformation quantity
Precision:
(1) Gross postionning and detection are carried out using the correlation of error；
(2) small Detection of Gross Errors is carried out using difference between epoch；
(3) data of multiple epoch carry out overall adjustment, analyze residual error, carry out determining power to initial data again,
Then adjustment solves baseline component, the precision of baseline component is improved, to improve bridge deformation amount computational accuracy.
Monitoring data analysis processing must be set up on accurately and effectively monitoring data, therefore, data processing it
Before, it is necessary to certificate authenticity, the influence of excluding gross error are carried out to monitoring data, and retain wrong data to submit data mode report
It accuses.Data prediction dumps to central database after being handled initial data, provides clean data, and structure for data analysis
The data warehouse towards analysis is built, as shown in figure 3, carrying out amount of deflection measured data curve comparison figure before and after data prediction.Pre- place
Reason process includes singular value rejecting, data reparation, characteristics extraction and Error processing, in error procedure, is rejected first thick
Big error reprocesses random error, last processing system error.After pretreatment
In high-precision deformation and displacement monitoring, other than there is something in common with the short baseline of general GNSS, base station and prison
The position of survey station is relatively fixed, therefore its systematic error has the characteristics that certain and rule.It is basic after double difference in terms of systematic error
On can completely eliminate the influence of satellite clock correction, receiver clock-offsets, and since parallax range is closer, orbit error influences non-
It is often small, therefore tropospheric residual error, ionosphere and diffracted error, multipath effect are exactly to influence the short baseline positioning accuracy of GNSS
Main systematic errors.
Data storage and management:
1) database based on on-line analytical processing is used, data management is carried out to initial data, is realized to specific point
Analysis demand carries out on line data access, meanwhile, in order to accelerate the storage searching and managing to data, and break through system file size
Limitation, data storage is using data grouping and divides table technology；
2) data are backed up using secondary data redundancy technique, with the complete backup and difference on database server
Backup is backed up as the first order, is backed up by the second level of the compress backup on remote data backup server, wherein the first order is standby
Part uses database maintenance technology, carries out weekly complete backup to data, differential backup once a day, not to backup
Data use compressed package, the size of Backup Data is reduced to the 30% of original backup file size, second level backup uses
Xcopy command techniques, will be on the data remote transmission that backed up on database server to another backup server；
3) data warehouse is constructed, detailed process includes Conceptual Model Design, logic model design and design of physical model,
In, Conceptual Model Design includes that conceptual model demand analysis and subject area determine that logic model design includes that system data amount is estimated
It calculates, granularity model design, data-splitting strategy design and metadata schema design, design of physical model include determining storage knot
Structure determines index structure, carries out merger to table and optimization storage distribution；If optimization storage distribution obtains result as single theme
Logic model design and design of physical model process are repeated, as shown in Figure 4；Data in data warehouse are cleared up and are extracted,
Each alanysis theme is constructed, is shown by the way that data analysis application is integrated；
Data analysis application is integrated: data processed result shows that data analysis is answered by data analysis application integrated software
It include that PC browser and smart phone APP, PC browser pass through the software offer interface based on B/S framework, intelligence with integrated software
Energy cell phone application, is realized by wechat platform, and the compatible Android and IOS system of data analysis application integrated software；Specific packet
Include: GIS map integrates more bridge block monitoring management modules, Real-time Monitoring Data and the inquiry of historical data module, and multistage early warning is set
It sets, analyze and reminding module, big data analysis bridge deformation sends rule of development module, automatically generates bridge deformation monitoring report
Module, user monitor configuration module and data download module.
The Real-time Monitoring Data and the inquiry of historical data module include that the real-time curve of bridge deformation monitoring data is shown
Module, absolute elevation and relative deformation's data and curves analysis module draw full-bridge according to the amount of deflection measuring point being distributed on bridge
Linear module, multistage early warning envelope analysis module, the inquiry of historical data module and data downloading.
Multistage early warning setting, analysis and reminding module are counted by analysis of bridge structure and deformation monitoring historical data, if
The threshold value for setting each distortion monitoring points, be arranged in the backstage Warning Service program of cloud computation data center according to the threshold value of setting from
It is dynamic to carry out differentiation of transfiniting, and in will transfinite information write-in database and short message warning table, it is equal in PC browser and smart phone APP
Threshold value, which can be viewed, to transfinite information, and it is disposed and is closed；At the same time, the information that transfinites meeting automatic clustering, and lead to
Crossing the mode of short message and mail and sending different threshold values to the user of different levels respectively transfinites information.
The deformation monitoring that configuration module increases certain bridge block is monitored by user, it includes prison that user, which monitors configuration module mainly,
Type configuration, monitoring cross section configuration, monitoring point configuration and detection page operating parameter configuration are surveyed, wherein monitoring type configuration is not to
Same deformation type parameter is managed, and deformation type parameter includes that amount of deflection, bridge pier sedimentation and expansion joint displacement, monitoring cross section are matched
Setting is managed to bridge sectional position information where deformation point layout, and the integrated pipe of multiple measuring points is arranged in a section
Reason, monitoring point configuration are that the position to section where monitoring point, a reference value, practical photograph information are managed, and to monitoring point
Storage mode and location information are managed.
Embodiment 1
In order to illustrate technical effect of the invention, the present invention is carried out by monitoring object of Beijing-Hongkong Australia high speed Cai pasture Hanjiang River Bridge
Mid-span deflection long term monitoring.Hanjiang River Bridge is the grand bridge that Han River is crossed in Beijing-Hongkong Australia highway Hubei within the border, is located at lake
The Wuhan City Bei Sheng Caidian District, full-bridge are made of the agricultural road of two-way four-lane highway and two lanes, and in October, 1998 goes into operation,
In October, 2001 is completed.Main bridge superstructure is prestressed concrete box type section continuous rigid frame, and left and right width is respectively single packing list
Chamber beam and single box double room box girder, main spanning diameter bridge, which collapses, is arranged as 110m+180m+110m, bridge floor overall with 28m.2014 right
Hanjiang River Bridge is monitored, it is found that actual measurement in main bridge 2014 is linear compared with linear at bridge, beam body downwarp amount is in left width spanning
16.3cm, beam body downwarp amount is 16.7cm in right width spanning；Compared with bridge floor actual measurement in 2006 is linear, in left width spanning under beam body
The amount of scratching is 4.8cm, and beam body downwarp amount is 5.0cm in right width spanning.
According to Hanjiang River Bridge beam body downwarp situation, project team is quasi- to be monitored the bridge using Beidou bridge monitoring system.
The general layout of deformation test section as shown in figure 5, using end bay, in across span centre and bridge pier key position as testing section, wherein
The section S1~S3 be superstructure side, in across span centre testing section；S4, S5 are each pier pier top section.Main bridge box beam deforms measuring point
Arrangement on the outside of box girder web as shown in figure 5, arrange 2 measuring points.
Embodiment 2
Bridge deformation early warning analysis is carried out using method provided by the invention, is reminded, according to the dynamic deformation amount monitored
Whether maximum value alarms in normal range (NR) to beam body flexible deformation.The dynamic deformation amount measured according to monitoring system, in conjunction with
Calculation Anaysis for Tunnel Structure when Bridge Design, under ultimate limit state of bridge carrying capacity and serviceability limit state under, beam body across
In under design load most dangerous combination situation deformation values a value, when the maximum dynamic deformation amount b value monitored be greater than a value when, supervise
Examining system issues alarm signal.As shown in fig. 6, for using the deck-molding of the bridge after method provided by the invention measurement completion 13 years
Journey and contrast curve chart when at bridge.
When the present invention monitors that continuous bridge span centre static deformation amount is abnormal, early warning and alarm can be also provided in time.
1. for the continuous beam main span span centre static deformation amount that monitoring system measures, according to " Highway bridge technique situation is commented
Calibration is quasi- ", when obvious downwarp occurs in beam body, it is that bridge main span calculates across footpath that amount of deflection, which is less than L/1000(L) or component be bent
Deformation, driving slightly sense are vibrated or are rocked, and beam body component assessment scale is 3, are paid attention to when causing pipe to support unit；
2. amount of deflection is less than L/600 greater than L/1000 or component has apparent permanent change when significant downwarp occurs in beam body
There is more serious disease with beam slab in shape, and beam body component assessment scale is 4, and monitoring system, which is worked as, to be issued warning signal；
3. causing structure apparent permanent deformation occur when beam body amount of deflection is greater than L/600, there is serious plant disease in beam slab, shows
Writing influences bearing capacity and traffic safety, and monitoring system is when sending alarm signal.
The above is only a preferred embodiment of the present invention, it is noted that for the ordinary skill people of the art
For member, without departing from the technical principles of the invention, several improvement and deformations can also be made, these improvement and deformations
Also it should be regarded as protection scope of the present invention.
Claims (7)
1. the Large Span Bridges deformation method of real-time based on dipper system, it is characterised in that:
Data acquisition: bridge initial data is acquired by Beidou ground strengthening system and Beidou bridge deformation monitoring station, is then passed through
Wired fiber optic network, wired internet or wireless network transmissions are carried out to cloud computation data center, and by cloud computation data center
Data Analysis Services and storage；Wherein, Beidou bridge deformation monitoring station is divided into deflection monitoring station, bridge according to the difference of setting position
Pier differential settlement monitoring station and expansion joint conjugate feature monitoring station, and Beidou bridge deformation monitoring station includes Beidou antenna, receives
Machine and lightning protection, Beidou ground strengthening system include base station, System Control Center and subscriber data center；
Data processing: cloud computation data center is based on cloud computing environment and successively carries out at difference processing and filtering to initial data
Reason realizes the real-time resolving to initial data, the bridge deformation data after being resolved, and the bridge by initial data and after resolving
Beam deformation data is stored into database respectively；
Bridge deformation is abnormal using real-time kinematical RTK mensuration and is a little positioned, specifically: on the one hand subscriber computer passes through
Baseband signal processing module obtains observation data and navigation message, and on the other hand, subscriber computer waits the carrier phase difference of base station
Point correction, after receiving the carrier phase difference correction from base station, by this carrier phase difference correction, original
Data apply carrier phase differential positioning to resolve together with navigation message, obtain positioning result；
Baselines process includes: the reading of initial data；The inspection and modification of initial data need after reading in initial data
Initial data is checked, inspection item includes that monitoring station name, monitoring point number, monitoring station coordinates and antenna are high；Baseline
The determination of control parameter is resolved, Baselines control parameter is used to determine that processing method carries out Baselines；Baselines；Baseline
The inspection of quality after Baselines, is tested to baseline, if unqualified, is resolved again or again to original
Beginning data are acquired, the inspection of base line quality include RATIO, RDOP, RMS, synchronous ring close and poor, asynchronous loop close and it is poor and
Repetitive baseline is poor；
Data storage and management:
1) database based on on-line analytical processing is used, data management is carried out, is realized online to the progress of particular analysis demand
Data access, meanwhile, in order to accelerate the storage searching and managing to data, and the limitation of system file size is broken through, data storage
Using data grouping and divide table technology；
2) data are backed up using secondary data redundancy technique, is backed up with complete on database server and differential backup
It backs up as the first order, is backed up by the second level of the compress backup on remote data backup server, wherein first order backup is adopted
With database maintenance technology, weekly complete backup is carried out to data, differential backup once a day, not to the number of backup
According to compressed package is used, the size of Backup Data is reduced to the 30% of original backup file size, second level backup uses
Xcopy command techniques, will be on the data remote transmission that backed up on database server to another backup server；
3) data warehouse is constructed, detailed process includes Conceptual Model Design, logic model design and design of physical model, wherein
Conceptual Model Design includes that conceptual model demand analysis and subject area determine, logic model design include the estimation of system data amount,
Granularity model design, data-splitting strategy design and metadata schema design, design of physical model include determine storage organization, really
Standing wire guiding structure carries out merger and optimization storage distribution to table；It obtains repeating if result is single theme if optimization storage distribution
Logic model design and design of physical model process；Data in data warehouse are cleared up and extracted, each alanysis master is constructed
Topic is shown by the way that data analysis application is integrated；
Data analysis application is integrated: data processed result shown by data analysis application integrated software, data analysis application collection
It include that PC browser and smart phone APP, PC browser pass through the software offer interface based on B/S framework, intelligent hand at software
Machine APP, is realized by wechat platform, and the compatible Android and IOS system of data analysis application integrated software；It specifically includes:
GIS map integrates more bridge block monitoring management modules, Real-time Monitoring Data and the inquiry of historical data module, multistage early warning setting,
Analysis and reminding module, big data analysis bridge deformation send rule of development module, automatically generate bridge deformation monitoring report mould
Block, user monitor configuration module and data download module.
2. the Large Span Bridges deformation method of real-time according to claim 1 based on dipper system, it is characterised in that:
The Real-time Monitoring Data and the inquiry of historical data module include the real-time curve display module of bridge deformation monitoring data, absolutely
Elevation and relative deformation's data and curves analysis module draw the linear module of full-bridge according to the amount of deflection measuring point being distributed on bridge,
Multistage early warning envelope analysis module, the inquiry of historical data module and data downloading.
3. the Large Span Bridges deformation method of real-time according to claim 1 based on dipper system, it is characterised in that:
Multistage early warning setting, analysis and reminding module are counted by analysis of bridge structure and deformation monitoring historical data, and each change is arranged
The threshold value of shape monitoring point, the backstage Warning Service program that cloud computation data center is arranged in are surpassed automatically according to the threshold value of setting
Limit differentiates, and in will transfinite information write-in database and short message warning table, can check in PC browser and smart phone APP
It transfinites information to threshold value, and it is disposed and is closed；At the same time, the information that transfinites can automatic clustering, and by short message and
The mode of mail, which sends different threshold values to the user of different levels respectively, to transfinite information.
4. the Large Span Bridges deformation method of real-time according to claim 1 based on dipper system, it is characterised in that:
The deformation monitoring that configuration module increases certain bridge block is monitored by user, user monitors configuration module and mainly matches including monitoring type
Set, monitoring cross section configuration, monitoring point configuration and detection the page operating parameter configuration, wherein monitoring type configuration to different deformations
Type parameter is managed, and deformation type parameter includes amount of deflection, bridge pier sedimentation and expansion joint displacement, and monitoring cross section configuration is to change
Bridge sectional position information is managed where shape point layout, and the integrated management of multiple measuring points, monitoring point are arranged in a section
Configuration is that the position to section where monitoring point, a reference value, practical photograph information are managed, and to monitoring point storage mode and
Location information is managed.
5. the Large Span Bridges deformation method of real-time according to claim 1 based on dipper system, it is characterised in that:
It is to determine the integer ambiguity of starting using the key of real-time kinematical RTK mensuration, the determination method of integer ambiguity is as follows:
1) the fuzziness float-solution with website coordinate outline known constraints is added to solve；
2) several groups fuzziness is searched out using LAMBDA method；
3) several groups fuzziness is checked according to the difference of residual sum of squares (RSS), baseline length difference and pitch angle, finally determined most
Good fuzziness.
6. the Large Span Bridges deformation method of real-time according to claim 5 based on dipper system, it is characterised in that:
After determining best fuzziness, if solving bridge deformation amount calculated result using carrier phase observation data is not achieved required precision,
The precision of bridge deformation amount calculated result is then improved by the following method:
(1) Gross postionning and detection are carried out using the correlation of error；
(2) small Detection of Gross Errors is carried out using difference between epoch；
(3) data of multiple epoch carry out overall adjustment, analyze residual error, carry out determining power to initial data again, then
Adjustment solves baseline component, the precision of baseline component is improved, to improve bridge deformation amount computational accuracy.
7. the Large Span Bridges deformation method of real-time according to claim 1 based on dipper system, it is characterised in that:
Data processing further includes preprocessing process, and preprocessing process includes at singular value rejecting, data reparation, characteristics extraction and error
It manages, in error procedure, rejects gross error first, reprocess random error, last processing system error.
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