CN102966041A - Spatial stay-cable positioning method of multispan continuous S-shaped landscape bridge - Google Patents
Spatial stay-cable positioning method of multispan continuous S-shaped landscape bridge Download PDFInfo
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- CN102966041A CN102966041A CN2012104409846A CN201210440984A CN102966041A CN 102966041 A CN102966041 A CN 102966041A CN 2012104409846 A CN2012104409846 A CN 2012104409846A CN 201210440984 A CN201210440984 A CN 201210440984A CN 102966041 A CN102966041 A CN 102966041A
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Abstract
The invention relates to a spatial stay-cable positioning method of a multispan continuous S-shaped landscape bridge, which belongs to the building field, and the method is characterized in that a central calibrator is used for positioning a central point of an anchor bearing plate on an anchoring end of a stay cable and a central point of an outlet of the stay cable, i.e. the central line of the anchor bearing plate is overlapped with the central line of the central calibrator, the central position of the anchor bearing plate is determined, and the central calibrator is a circular steel plate with the diameter which is identical to the inner diameter of a stay cable conduit; the a semicircular central calibrator is vertical to a bushing of the stay cable conduit which is previously calibrated and plugged into an outer opening of the bushing by utilizing the calibration of the semicircular central calibrator for the center of the outlet of the stay cable conduit on the outer side of an S-shaped landscape bridge main tower wall, the arc edge and the center of the semicircular central calibrator is are matched with the inner wall of the bushing, and the central position of the outlet of the stay cable conduit on the outer side of the S-shaped landscape bridge main tower wall can be obtained; and the semicircular central calibrator is a semicircular steel plate with the diameter being identical to the inner diameter of the stay cable conduit. The positioning method is high in precision and fast in speed.
Description
Technical field
The invention belongs to building field, be specifically related to continuously " S " type Landscape Bridge Space Oblique drag-line localization method of multispan.
Background technology
Cable stayed bridge is by king-tower, suspension cable, Sarasota and steel case the beam common stressed and stable space bearing structural system that forms of bracing in length and breadth.In the middle of this space structure system, suspension cable is the tie that connects steel case beam and Sarasota, it makes steel case beam become a multiple spot resiliency supported, make cable stayed bridge be similar to continuous beam on many supports, greatly reduced the moment of flexure of steel case beam, simultaneously, deadweight and the mobile load of steel case beam are delivered to king-tower by suspension cable with Suo Li, because suspension cable is symmetrical, makes Sarasota, steel case beam be in all the time the eccentric compression state.
In the middle of the process of this power transmission, suspension cable plays critical effect, and suspension cable is directly to be anchored on Sarasota and the girder by cableway pipe, so the precision of its anchorage point will directly have influence on the distribution situation of Suo Li on Sarasota, girder; Inadequate such as precision, the whole force structure of bridge is changed, or under wind-force and other External Force Actings, the cableway mouth of pipe and suspension cable rub, and shortened the application life of suspension cable.
Summary of the invention
The purpose of this invention is to provide continuously " S " type Landscape Bridge Space Oblique drag-line localization method of precision height, fireballing multispan.
The present invention includes: (1), in the e-file of site plan, utilize first that AutoCad catches, query function gets off the coordinate automatic capturing of " S " type Landscape Bridge axis and suspension cable fixed point;
(2), select the coordinate setting point, namely the position of distance " S " type Landscape Bridge axis two ends 30～50m is as the coordinate setting point; Utilizing the full-bridge horizontal control network to carry out three dimensional space coordinate by means of total powerstation measures;
(3), the drawing and suspension cable catheter anchoring fixed end center and the export center coordinate that provide by designing institute, the drawing three-dimensional stereogram;
(4), utilize the center calibration device to anchored end anchor plate location of the core, be about to the center line and the central lines of center calibration device of anchor plate, i.e. the center of definite anchor plate; Described center calibration device is a diameter circular steel plate identical with the internal diameter of suspension cable conduit;
(5), utilize semicircle center calibration device to the demarcation at suspension cable conduit outlet center, " S " type Landscape Bridge king-tower tower wall outside, be about to semicircle center calibration device perpendicular to demarcating in advance the sleeve pipe of suspension cable conduit well and inserting in the sleeve pipe collar extension, the curved edge of semicircle center calibration device and the center coincide with internal surface of sleeve pipe, can get suspension cable conduit outlet center outside " S " type Landscape Bridge king-tower tower wall; Described semicircle center calibration device is a diameter semicircle steel plate identical with the internal diameter of suspension cable conduit.
The present invention compares with present landscape bridge Space Oblique drag-line localization method has following features:
1. once observation, necessary observation data, oblique distance, vertical angle, horizontal angle etc. all show total powerstation automatically, can obtain in a flash together coordinate and the elevation of flat distance, the discrepancy in elevation, point at survey station.
2. by coffret the data terminal that total powerstation gathers is connected with computer, is equipped with the automation that data processing software, mapping software can be realized mapping.
3. only total powerstation need be propped up and be located at a survey station that intervisibility is good, can carry out integral body and even detailed survey to engineering measuring position simultaneously, reduce the quantity of laying the control point, accurate, convenient, fast.
4. total powerstation and computer compound are used, bring the technological progress of construction lofting, greatly simplified traditional construction survey method, make the modern construction measuring method become flexibly, make things convenient for, precision is high, labour intensity is little, high efficiency, and has realized digitlization, automation and the informationization of construction survey.
5. can immediately draw position coordinate and deviation information, can also carry out inverse in conjunction with the layout point coordinate, draw at any time suggestion, correct amount, be convenient to command setting-out work.
6. set up the database of control point, layout point, can carry out easily inquiry, the management of position coordinate and field data.
7. it is little affected by execution conditions and external environment.
The specific embodiment
Embodiment: present embodiment is applied to Xiangfen County People's Bank of China Landscape Bridge engineering, and full-bridge is divided into four and strides, total length 203.47m.Bridge floor is curve steel box beam.Hang suspension cable between king-tower and the steel case beam.
2.1, Engineering Notice
Xiangfen County People's Bank of China Landscape Bridge is located in county town, Xiangfen center lot, is emphasis and bright spot engineering in the Fenhe River Control Project of Xiangfen County, and the Landscape Bridge after building up will become the landmark building of Xiangfen County.Full-bridge divides four to stride, total length 203.47m.Xiangfen County People's Bank of China Landscape Bridge form of structure is cable stayed bridge and beam bridge Combined bridge, abutment adopts reinforced concrete pile formula abutment, bridge pier adopts the steel concrete Thin-Wall Piers, foundation of main pylon is that cushion cap is divided into multi-column pier foundation, king-tower height 64m, the king-tower bridge floor is following to be solid construction, more than is the hollow box beam.Superstructure is curve steel box beam.
2.2, the engineering design overview
1. full-bridge is comprised of abutment, bridge pier, king-tower.Wherein abutment is 2, is respectively 1# abutment and 5# abutment; 4 on bridge pier is respectively the left abutment of 2# and the right abutment of 2#, the left bridge pier of 4#, the right bridge pier of 4#; 2 of king-towers are respectively the left king-towers of 3#, the right king-tower of 3#.
2. span distribution: 38.45m+65.58m+62.74m+36.70m, the 1# abutment is respectively 36.69m, 45.19m, 51.021m, 13.839m, 65.585m to 5# abutment arc length, and 5# abutment to 1# abutment arc length is respectively 65.585m, 13.839m, 51.021m, 45.19m, 36.69m.
3. king-tower
King-tower is only tower, tower height 64m.The king-tower section form is rectangle, along bridge to long 5.0m, the wide 4.0m of direction across bridge, king-tower is tilted in 1 ︰, 10 ratios.
4. girder
This bridge superstructure steel case beam is formed by the Q345E Plate Welding.The girder superstructure is comprised of prefabricated internode section, bridge pier sections and abutment sections three parts respectively, establishes junction steel plate between the each several part and is connected U-shaped rib.Superstructure is in manufacturing process, and a minute prefabricated internode is made, and each panel length and radius differ, and carries out factory's welding according to the size on the drawing.
5. suspension cable
The suspension cable that this bridge is comprised of 4 1860 Φ, 15.24 epoxy spray steel strands, drag-line outsourcing PE protective materials.Full-bridge amounts to 40 drag-lines.The Cable face is that the space is fan-shaped, and is bottom-up to the inclination of the bridge outside; King-tower drag-line 30.5 meters positions from bridge floor begin to arrange, and 1.5 meters of spacings are arranged 4 meters of spacings with anchor case midline on the bridge floor.
6. passage
22.38 meters of passage overall lengths, wide 4.144 meters, overhead about 62 meters high in passage.
Technology is prepared
1, the complete engineering electronic edition drawing of a cover is arranged, pore over design drawing, understand design idea, clear and definite designing requirement.
2, each control point and the spot height that carry out city's planning that the owner provides are transferred, and set up job site coordinate system and control net, watch surrounding enviroment.
3, consider on the basis of designing requirement, location condition, site contour and the design of engineering construction tissue the establishment measurement scheme.
4, grasp total powerstation performance and measurement technique and standard.
Set up horizontal control network
1, handles control point and spot height transfer formality with the owner.
2, the horizontal control point of giving according to the owner, pilot measurement is better to the job site intervisibility, and is difficult for the place of touching, buries the control stake underground.
3, the control point that provides by the owner utilizes total powerstation that a ready-made control coordinate measurement is established and record.
4, the control stake is checked, each survey station carries out two survey time angles, distance measurement.
Plain location method
1, all coordinate point all adopt the absolute coordinate of design drawing.
2, in the e-file of site plan, utilize first AutoCad seizure, query function that the coordinate automatic capturing of required main points is got off.
3, choose the traverse station of having checked, with near the point of proposed building for putting the mirror point, another is put as backsight point and carries out setting out survey.
4, total powerstation is carried out the neutralization leveling is set instrument parameter.
5, enter coordinate setting-out pattern, input survey station point coordinates, instrument is high, target is high.
6, enter azimuthal state that arranges, the coordinate of input backsight point.Accurately sight backsight point prism center, instrument will be finished the azimuthal setting of backsight point automatically according to survey station point and backsight point coordinate.
7, again enter coordinate setting-out pattern, the coordinate of lofting control point is treated in input.
8, the alidade of rotation total powerstation, shown horizontal angle reading is zero.At this moment, the direction of sighting is the direction of tested point.The instrumentation personnel can command and treat near the prism layout point, measure by control point, and instrument display goes out to pre-enter treats the poor of setting-out value and measured value.
9, root a tree name show value, commander holds the survey crew of prism, along the prism of sighting direction moving belt measuring staff, until the show value on the observation screen is within error range.
The position pile anchoring of 10, indicating at measuring staff.
11, continuous " S " type multi-curvature curve Landscape Bridge positioning of steel box girder of bilateral multispan is surveyed the method that adopts plane positioning of establishing.The radius of the every sections circular arc of Landscape Bridge steel case beam, arc length and trend all differ.When surveying work begins according to linear two end points coordinates that in electronic edition AutoCad figure, pick up on per stage case beam center line of steel case beam curve.Utilize the setting-out and carry out mark on the concrete temporary supporting basis of building of coordinate point position that total powerstation will pick up.Utilize on the some position that ceiling hammer puts the stage case beam centerline vertical projection that processes to the temporary supporting basis well during the steel pile equipment and overlap with it.Just accurate positioning by drawing of " S " type multi-curvature curve steel box beam like this.It is linear in time to utilize total powerstation to check in the steel case beam splicing.
The three-dimensional fix method
Some X in space coordinates, Y, the position of Z are namely determined in three-dimensional fix.
To the king-tower space fan-shaped inclined cable deferent space orientation setting-out of 10:1 inclination " eight " Zee bar steel Z reinforced concrete.40 of the total suspension cables of full-bridge are fan-shaped and arrange, its plan-position of location major control, elevation and the angle of slope of cableway pipe.Cableway pipe location in the king-tower is directly connected to the quality of main bridge, and its setting-out precision is high, and difficulty is large, and location survey should be conscientiously careful, and in time check.The required precision of cableway pipe measurement and positioning is higher.The line style of building up rear suspension cable and girder in order to ensure cable stayed bridge approaches the design line style, requirement according to Code for engineering surveying, the required precision of cable guide pipe spatial position measuring location is up to ± 5mm, namely for original control net, the construction location of cable guide pipe anchored end center and export center and design attitude deviation are at X, Y, three directions of Z all must not be greater than ± 5mm.Three dimensional space coordinate method positioning instant utilizes the full-bridge horizontal control network to carry out the measurement of three dimensional space coordinate by means of total powerstation.
This bridge can directly be measured and be adjusted cable guide pipe anchoring section and export center.Concrete operation step is as follows:
1, sets up at the construction field (site) at least 3 at level control point, and bench level is checked.
2, the AutoCad electronic edition drawing and cable guide pipe anchored end center and the conduit mouth centre coordinate that provide by designing institute, the drawing three-dimensional stereogram.
3, anchored end anchor plate central point is demarcated.Utilize the center calibration device of a circle of steel plate processing.The diameter of this calibration device is consistent with the internal diameter of cable guide pipe, welds 4 symmetrical backing plates around calibration device, Accurate Calibration circle center, and carry out mark.Only need during use calibration device is covered the anchor plate center, can obtain the anchor plate center after coincideing.
4, the demarcation at tower wall lateral funiculus conduit mouth center.Adopt certain thick steel plate processing, make a semicircular calibration device, the diameter of this calibration device is consistent with the internal diameter of cable guide pipe, finds out the center of circle, and carries out mark.Directly calibration device is inserted on the circumference of demarcating in advance good place, sleeve pipe collar extension center during use, coincideing to get its position.
5, by the coordinate in the AutoCad electronic edition drawing, use the plan-position of total powerstation measuring X, Y, location, concrete operation method isoplanar.
6, according to the height of Z direction between the clearancen of design drawing calculating, determine with level gauge, steel ruler.
The location setting-out of " eight " font 1 ︰ 10 inclined reinforcing bar concrete king-towers
1, plan-position, verticality and the direction of king-post setting-out major control king-post; In addition, the elevation of king-post top or other variation portions is controlled.The setting-out of king-post plan-position adopts the total station instrument coordinate method to carry out.The control of king-post elevation adopts the steel ruler transmission method to carry out.
2, verticality, gradient plane projection coordinate all adopt the CAD geometrical principle to calculate, gradient, verticality utilize the stability of stiff skeleton to make interim plane angle steel or steel pipe is fixed on verticality and the gradient that normal line method control is adopted on stiff skeleton top.
3, after template installs, physical dimension and the locus of template checked.Then inspection method checks physical dimension, verticality and the plan-position of templates for going out axis and horizontal mileage line with instrument setting-out on template first with instruments such as steel ruler, plumb bobs, check elevation with level gauge observation.
4, during the crossbeam setting-out, the cross dimensions deviation is not more than ± 20 ㎜, and the crossbeam elevation is not more than ± 10 ㎜, and the elevation transmission adopts total powerstation to pass supreme people's court.
5, during the Sarasota setting-out, must take pre-deviator and pre-arch amount into account.Along with the rising of Sarasota, for weakening wind-force to the impact of measurement result, carry out setting-out work in the time that less wind-force should being chosen in.After the Template Location, before the concreting, the applying three-dimensional coordinate method checks.
6, along with the rising of Sarasota, can cause the variation of working base point under the tower, should regularly and control the net translocation, revise.
7, after the Sarasota completion, should measure king-tower gradient, span and cat head elevation, calculate the foundation of adjusting as main line shape.
8, Sarasota construction period, should regularly carry out deformation observation.
Total powerstation must carry out verification to instrument by by specification before use.
The required precision at control point and the error of theoretical value are no more than ± 1mm.
Measure the required precision of operation: the required precision of measuring operation is controlled at ± 3mm within.
The wire relative closing error of extreme length is controlled in 40 ㎜, and the triangle maximum close is poor ± and 30.0 ".
The present invention can carry out the control of plane building net accurately, easily, and certainty of measurement is high, speed is fast, easy and simple to handle, safe, practical, be not subjected to place restriction, directly setting-out; And the automatic capturing coordinate function of CAD has been avoided loaded down with trivial details calculating, and the planar graph of building is more complicated, and the benefit that plays is more remarkable.
Claims (1)
1. the continuous S type of multispan Landscape Bridge Space Oblique drag-line localization method is characterized in that:
(1), in the e-file of site plan, utilize first that AutoCad catches, query function gets off the coordinate automatic capturing of " S " type Landscape Bridge axis and suspension cable fixed point;
(2), select the coordinate setting point, namely the position of distance " S " type Landscape Bridge axis two ends 30～50m is as the coordinate setting point; Utilizing the full-bridge horizontal control network to carry out three dimensional space coordinate by means of total powerstation measures;
(3), the drawing and suspension cable catheter anchoring fixed end center and the export center coordinate that provide by designing institute, the drawing three-dimensional stereogram;
(4), utilize the center calibration device to anchored end anchor plate location of the core, be about to the center line and the central lines of center calibration device of anchor plate, i.e. the center of definite anchor plate; Described center calibration device is a diameter circular steel plate identical with the internal diameter of suspension cable conduit;
(5), utilize semicircle center calibration device to the demarcation at suspension cable conduit outlet center, " S " type Landscape Bridge king-tower tower wall outside, be about to semicircle center calibration device perpendicular to demarcating in advance the sleeve pipe of suspension cable conduit well and inserting in the sleeve pipe collar extension, the curved edge of semicircle center calibration device and the center coincide with internal surface of sleeve pipe, can get suspension cable conduit outlet center outside " S " type Landscape Bridge king-tower tower wall; Described semicircle center calibration device is a diameter semicircle steel plate identical with the internal diameter of suspension cable conduit.
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103452047A (en) * | 2013-08-29 | 2013-12-18 | 中交第二航务工程局有限公司 | Cable conduit orifice central point positioning device and use method |
| CN105113411A (en) * | 2015-08-03 | 2015-12-02 | 中铁港航局集团有限公司 | Method for mounting and rapidly and accurately positioning main tower cable guide pipe of cable-stayed bridge |
| CN106948272A (en) * | 2017-05-04 | 2017-07-14 | 吴思明 | A kind of Cable stayed Bridge Main Tower noose pipe installs surveying and locating locator |
| CN108360386A (en) * | 2018-03-29 | 2018-08-03 | 石家庄铁道大学 | A kind of accurate erection construction method of whole opening prefabricated simple supported box beam bridge |
| CN106638318B (en) * | 2016-11-25 | 2019-03-15 | 中铁大桥局集团第五工程有限公司 | The localization method and cable guide pipe installation method of cable-stayed bridge beam-ends anchor point |
| CN110280838A (en) * | 2018-08-08 | 2019-09-27 | 江苏中铁山桥重工有限公司 | A kind of spherical surface steel structure surface positioning cut hole method |
| CN111364359A (en) * | 2020-04-08 | 2020-07-03 | 五冶集团上海有限公司 | Anchor pipe type cable beam anchoring structure of cable-stayed bridge concrete main beam and positioning method thereof |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103452047A (en) * | 2013-08-29 | 2013-12-18 | 中交第二航务工程局有限公司 | Cable conduit orifice central point positioning device and use method |
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| CN105113411A (en) * | 2015-08-03 | 2015-12-02 | 中铁港航局集团有限公司 | Method for mounting and rapidly and accurately positioning main tower cable guide pipe of cable-stayed bridge |
| CN106638318B (en) * | 2016-11-25 | 2019-03-15 | 中铁大桥局集团第五工程有限公司 | The localization method and cable guide pipe installation method of cable-stayed bridge beam-ends anchor point |
| CN106948272A (en) * | 2017-05-04 | 2017-07-14 | 吴思明 | A kind of Cable stayed Bridge Main Tower noose pipe installs surveying and locating locator |
| CN108360386A (en) * | 2018-03-29 | 2018-08-03 | 石家庄铁道大学 | A kind of accurate erection construction method of whole opening prefabricated simple supported box beam bridge |
| CN108360386B (en) * | 2018-03-29 | 2019-07-05 | 石家庄铁道大学 | A kind of accurate erection construction method of whole opening prefabricated simple supported box beam bridge |
| CN110280838A (en) * | 2018-08-08 | 2019-09-27 | 江苏中铁山桥重工有限公司 | A kind of spherical surface steel structure surface positioning cut hole method |
| CN110280838B (en) * | 2018-08-08 | 2021-07-30 | 江苏中铁山桥重工有限公司 | Method for positioning and cutting hole on surface of spherical steel structure |
| CN111364359A (en) * | 2020-04-08 | 2020-07-03 | 五冶集团上海有限公司 | Anchor pipe type cable beam anchoring structure of cable-stayed bridge concrete main beam and positioning method thereof |
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Application publication date: 20130313 |