CN104153391A - Open caisson geometrical shape monitoring method based on differential GPS - Google Patents
Open caisson geometrical shape monitoring method based on differential GPS Download PDFInfo
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- CN104153391A CN104153391A CN201410321001.6A CN201410321001A CN104153391A CN 104153391 A CN104153391 A CN 104153391A CN 201410321001 A CN201410321001 A CN 201410321001A CN 104153391 A CN104153391 A CN 104153391A
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Abstract
The invention discloses an open caisson geometrical shape monitoring method based on a differential GPS. A GPS monitoring base station is built to monitor parameters of coordinates of the center of an open caisson, elevation, deviation, torsion, cutting edge elevation, riverbed surface elevation inside and outside the open caisson, flow rate and flow direction of water, wave force, water level elevation and the like in the processes of floating, undocking, towing, berthing, submerging, docking and the like of the open caisson. GPS positioning measurement data of all monitoring points on the top of the open caisson are transmitted to a monitoring center in a wireless networking mode. The incline angle and the torsion angle posture are calculated in real time. Deviation of the open caisson is obtained through a data monitoring method. A control instruction is issued. The deviation of the open caisson is corrected by adjusting stress of a drag cable through a control device. The open caisson geometrical shape monitoring method can realize centimeter-level open caisson moving posture monitoring accuracy, and can well control real-time correction of the submerge deviation of the open caisson.
Description
Technical field
The present invention relates to the monitoring of open caisson geometric shape, be specifically related to open caisson geometric shape method for supervising a kind of Centimeter Level precision, real-time radio transmission.
Background technology
Open caisson tunnel is that the one progressively growing up at the beginning of last century is large-scale across water traffic engineering.During domestic at present existing multiple more river, engineerings over strait are being built or are planned and build.Get in the major workss such as the engineering over strait in river engineering, Peng Lai to Lvshun Zhuhai and Macao bridge island, port tunnel engineering, Qiongzhou Strait engineering over strait, entrance of Changjiang River, and majority is to have adopted open caisson tunnel scheme.Open caisson tunnel is by some prefabricated tube couplings, transportation by driving is to on-the-spot respectively, in turn sinking is installed one by one, be connected to each other under water and be correctly positioned in the foundation trench under water having excavated, thereafter be aided with correlation engineering construction, the key technology in open caisson tunnel mainly contains foundation trench and dredges and dig and foundation treatment technology, tube coupling prefabricating technique, tube coupling transportation by driving and sinking technology, tube coupling joint design and tube coupling waterproof technique.Open caisson transportation by driving and sinking are affected by the many-sides such as the density, wave, strong wind, tugboat characteristic, navigation channel characteristic, tube coupling characteristic, mooring way, pulling schemes, bench command of water velocity and direction, morning and evening tides, water, construct very complicated, and risk is larger.Ess-strain and resistance to overturning in open caisson traction and sinking process are monitored the great attention that is always subject to engineering circles.Chinese scholars has also been carried out more deep research.
Zou Jingui has analyzed the parameters such as construction open caisson geometric position has been carried out to the method for monitoring automatically, has adopted Visual C++ programming language and Access Database Systems, has realized construction open caisson automatic monitoring system.
Xiao Wenfu proposes tower super large well sinking monitoring technique in the bridge of Taizhou, comprise open caisson cutting edge reaction, side friction power, the borehole wall and native frictional resistance, the monitoring scheme of anchor hawser power, for the safe construction of open caisson foundation provides in time, accurate forecast early warning information.
Zhu Jianmin has carried out safely monitoring research to the yangtze river in nanjing four bridges north anchorage open caisson drainage sinks of planar dimension maximum in the world.Choose typical section according to finite element analysis result and monitor tensile stress variation, can find out the weak link of structure stress, for the sinking security monitoring of ultra-large type open caisson provides guidance.Zhao Youming, according to specification combination construction experience in the past, has proposed how much attitude monitoring standards of yangtze river in nanjing four bridges north anchorage open caissons.
Li Zongzhe has proposed to the monitoring technology of No. 6 well sinking resistances in the large-scale well-sinking group of power station, family dam.By these monitored data, the safety and steady of having controlled open caisson sinks.
Chen Song sets up the loose cable saddle horizontal movement monitoring model, open caisson front side foundation soil level of Changjiang River Highway Bridge north, Jiangyin anchorage open caisson of knowing clearly to counter-force monitoring model and substrate counter-force monitoring model from basic displacement monitoring, the monitoring of basic Against Sliding Stability and 3 aspects of foundation soil stability monitoring.
Comprehensive both at home and abroad, due to the restriction of technical condition and monitoring element, the real-time monitoring in open caisson traction and sinking process is generally monitoring by the penetration resistance monitoring to soil pressure.Still lack at present monitoring system and the method that can be accurate to Centimeter Level and monitor and provide Real-time Collection wireless transmission.
Summary of the invention
The present invention is directed to the existing defect of existing method, and provide a kind of open caisson geometric shape method for supervising based on differential GPS, the coordinate at open caisson center, elevation, off normal, torsion, sword footnote are high, the inside and outside riverbed of well face absolute altitude, the water flow velocity flow direction, wave force and water level elevation etc. parameter, pass through wireless transmission, calculate in real time gradient and angle of torsion attitude, and open caisson off normal amount is revised.
In order to achieve the above object, the present invention adopts following technical scheme
Open caisson geometric shape method for supervising based on differential GPS, the method comprises the steps:
(1) lay 4 control points as Fig. 2 in the surrounding on open caisson top, some position can consider according to field condition, and sets up survey mark bit flag, and GPS receiver antenna is installed, and together with the GPS datum station of settling, forms in real time dynamically relative positioning with bank side;
(2) set up steel well sinking GPS datum station, set up a monitored base stations at trestle place, for the real-time monitoring of open caisson;
(3) system is by wireless networking mode, and the gps position measurement real-time data transmission that open caisson is pushed up to each control point is to Surveillance center;
(4) measure open caisson construction plan-position.According to job site situation and construction technology, main high efficiency, high accuracy, high reliability and the low consumed difference global global position system (DGPS) of adopting of how much monitoring carried out plan-position measurement, and checks with total station survey result;
(5) monitoring open caisson displacement.According to the plane positioning result of open caisson, positioning result and notional result that four GPS of open caisson surrounding are ordered compare, obtain the x of each control point, y coordinate difference, and calculation level Bit Shift, the coordinate that utilizes open caisson surrounding GPS to order calculates heavy centre coordinate, and the design attitude at open caisson center compares, and can obtain the global displacement at open caisson center;
(6) measure open caisson elevation.Select on the coast 2-3 vertical control point, and put GPS receiver thereon, after another receiver initializes, measure respectively the geodetic height of open caisson axis point by GPS-RTK method, can try to achieve normal height by above-mentioned weighted mean method principle;
(7) measure and control open caisson tilting value.By monitoring open caisson axial line control point height, calculate the gradient of open caisson.Compare and try to achieve open caisson gradient with distance by the discrepancy in elevation between 2,4 and 1,3;
(8) calculate open caisson twist.Measured axial line control point 1 after putting in place according to well sinking ', 3 ' or 2 ', 4 ' two point coordinates obtain the angle of they and bridge axis, are open caisson torsional angle.
The present invention uses Differential GPS Technology to carry out high Precision Processing to monitoring open caisson geometric shape, makes to monitor precision and can reach Centimeter Level, makes well sinking off normal amount carry out revising and having good control ability in real time.
Brief description of the drawings
Further illustrate the present invention below in conjunction with the drawings and specific embodiments.
Fig. 1 is flow chart of the present invention
Fig. 2 is that open caisson top GPS measuring point is arranged schematic diagram
Fig. 3 is open caisson GPS observation schematic diagram
Fig. 4 is that steel open caisson reverses instrumentation plan
Detailed description of the invention
For technological means, creation characteristic that the present invention is realized, reach object and effect is easy to understand, below in conjunction with concrete diagram, further set forth the present invention.
High accuracy, real-time wireless transmission are the keys of open caisson geometric shape monitoring.For this reason, the invention provides a kind of open caisson geometric shape method for supervising based on differential GPS, the method comprises the steps (as shown in Figure 1):
(1) lay 4 control points as Fig. 2 in the surrounding on open caisson top, some position can consider according to field condition, and sets up survey mark bit flag, and GPS receiver antenna is installed, and together with the GPS datum station of settling, forms in real time dynamically relative positioning with bank side.
(2) set up steel well sinking GPS datum station
Set up a monitored base stations at trestle place, for the real-time monitoring of open caisson.
Except mode claimed in claim 3, it is characterized in that, also comprise and realize multiple control points synchronous acquisition.
(3.1) corresponding IP agreement is set, by wireless network, receives the data from each control point by omnidirectional antenna, then send data processing centre to;
(3.2) RS-232 serial line interface when GPS receiver adopts interface standard, radio spread spectrum communication network is RJ-45 interface;
(3.3) can realize the conversion of agreement by the serial communication device server based on IP agreement, form the wireless telecommunication system of single point-to-multipoint, realize multiple control points synchronous acquisition.
Except mode claimed in claim 4, it is characterized in that, also being included in Control Room sets up GPS to measure control and computer center, at any time the measurement parameter of base sites and rover station and data are transmitted by WLAN, carry out analyzing and processing in control centre, obtain the plan-position of each control point.
(5) monitoring open caisson displacement.According to the plane positioning result of open caisson, positioning result and notional result that four GPS of open caisson surrounding are ordered compare, obtain the x of each control point, y coordinate difference, and calculation level Bit Shift, the coordinate that utilizes open caisson surrounding GPS to order calculates heavy centre coordinate, and the design attitude at open caisson center compares, and can obtain the global displacement at open caisson center;
(6) measure open caisson elevation.Select on the coast 2-3 vertical control point, and put GPS receiver thereon, after another receiver initializes, measure respectively the geodetic height of open caisson axis point by GPS-RTK method, can try to achieve normal height by above-mentioned weighted mean method principle;
Except mode claimed in claim 7, it is characterized in that, while being also included in construction to concreting section, need instant measurement after each concreting, relative tilt between upper and lower joint changes, and sets up instant threedimensional model, in the end draw the true three-dimension attitude of open caisson.Meanwhile, the instant gradient that detects every joint open caisson inner side of employing plumb bob, measures the top mouth of every joint open caisson and the gradient of last joint open caisson top mouth is calculated, and perform record, analyze after each welding, below a joint open caisson on impact and the rule of a joint open caisson above, correct in advance.The well sinking degree of depth, plan-position and deflection adopt total powerstation, level gauge, automatic high range monitoring micro-pressure sensor and inclinometer monitoring.
Except mode claimed in claim 8, it is characterized in that, after also comprising that well sinking puts in place, can directly adopt GPS-RTK measurement pattern to measure the end face axial line control point coordinates of open caisson.Check with total powerstation method of polar coordinates simultaneously, ensure to survey data accurate.Steel open caisson reverses instrumentation plan as Fig. 4.
More than show and described general principle of the present invention, principal character and advantage of the present invention.The technician of the industry should understand; the present invention is not restricted to the described embodiments; that in above-described embodiment and manual, describes just illustrates principle of the present invention; without departing from the spirit and scope of the present invention; the present invention also has various changes and modifications, and these changes and improvements all fall in the claimed scope of the invention.The claimed scope of the present invention is defined by appending claims and equivalent thereof.
Claims (1)
1. the open caisson geometric shape method for supervising based on differential GPS, is characterized in that realizing high accuracy, calculates also wireless transmission open caisson geometric shape in real time, and the method comprises the steps:
(1) lay some control points in the surrounding on open caisson top, obtain the GPS position data of open caisson;
(2) set up steel well sinking GPS datum station;
(3) obtain plane coordinates and the elevation of each control point;
(4) by wireless networking mode, the gps position measurement real-time data transmission that open caisson is pushed up to each control point is to Surveillance center;
(5) measure open caisson construction plan-position; The displacement of monitoring open caisson; Measure open caisson elevation;
(6) Trigonometric Leveling by Total Station is carried out checking measurements;
(7) open caisson displacement monitoring;
(8) measure open caisson tilting value;
(9) calculate open caisson twist;
(10) open caisson off normal amount is revised.
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105714842A (en) * | 2016-02-04 | 2016-06-29 | 西南交通大学 | Open caisson sinking early warning method and system |
| CN106088127A (en) * | 2016-07-02 | 2016-11-09 | 天鸿建设集团有限公司 | Open caisson construction method |
| CN106522285A (en) * | 2016-10-08 | 2017-03-22 | 中国电力科学研究院 | Measuring method for foundation displacement of power transmission tower |
| CN112814011A (en) * | 2021-01-07 | 2021-05-18 | 西南交通大学 | Ultra-large open caisson foundation construction monitoring system and construction regulation and control method based on monitoring system |
| CN112902934A (en) * | 2021-01-22 | 2021-06-04 | 中铁大桥科学研究院有限公司 | Open caisson geometric attitude testing method based on GPS-EJA |
| CN114964350A (en) * | 2021-02-19 | 2022-08-30 | 中国铁道科学研究院集团有限公司 | Ultra-large type open caisson foundation construction monitoring system |
| CN117073765A (en) * | 2023-10-07 | 2023-11-17 | 中铁四局集团第二工程有限公司 | Intelligent construction auxiliary decision-making system and auxiliary decision-making method for open caisson floating and sinking installation |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105714842A (en) * | 2016-02-04 | 2016-06-29 | 西南交通大学 | Open caisson sinking early warning method and system |
| CN105714842B (en) * | 2016-02-04 | 2018-07-27 | 西南交通大学 | Well sinking method for early warning and system |
| CN106088127A (en) * | 2016-07-02 | 2016-11-09 | 天鸿建设集团有限公司 | Open caisson construction method |
| CN106522285A (en) * | 2016-10-08 | 2017-03-22 | 中国电力科学研究院 | Measuring method for foundation displacement of power transmission tower |
| CN112814011A (en) * | 2021-01-07 | 2021-05-18 | 西南交通大学 | Ultra-large open caisson foundation construction monitoring system and construction regulation and control method based on monitoring system |
| CN112902934A (en) * | 2021-01-22 | 2021-06-04 | 中铁大桥科学研究院有限公司 | Open caisson geometric attitude testing method based on GPS-EJA |
| CN114964350A (en) * | 2021-02-19 | 2022-08-30 | 中国铁道科学研究院集团有限公司 | Ultra-large type open caisson foundation construction monitoring system |
| CN117073765A (en) * | 2023-10-07 | 2023-11-17 | 中铁四局集团第二工程有限公司 | Intelligent construction auxiliary decision-making system and auxiliary decision-making method for open caisson floating and sinking installation |
| CN117073765B (en) * | 2023-10-07 | 2024-03-15 | 中铁四局集团有限公司 | Intelligent construction auxiliary decision-making system and auxiliary decision-making method for open caisson floating and sinking installation |
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Application publication date: 20141119 |