CN115369705A - Method for quickly networking cross-sea multi-connected large-span bridge CPIII - Google Patents
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Abstract
The invention provides a method for quickly networking a cross-sea multi-connected large-span bridge CPIII, which comprises the steps of integrally controlling the network construction of the CPIII of the cross-sea multi-connected large-span bridge, analyzing according to the structural form of the multi-connected large-span bridge, embedding CPIII embedded parts at specific positions of a plane stable point and an elevation stable point on a beam body, and properly increasing CPIII floating points between the stable points according to the distance requirement in the specification; after the CPIII points of the offshore bridge are arranged, 6 pairs of CPIII points on the simply supported beams on the two coast sides are utilized to carry out integral networking on the CPIII of the offshore bridge. Before the ballastless track is constructed, the same-precision interpolation is carried out on floating points of sections required by construction by utilizing the stable points of the whole track control network, and the required CPIII track control network is quickly formed. The method has the advantages of good construction quality, low cost, short construction period, good economic benefit and social benefit and the like.
Description
Technical Field
The invention relates to the field of CPIII fast networking, in particular to a method for cross-sea multi-connected large-span bridge CPIII fast networking.
Background
The CPIII track control network is a premise of ensuring the high-precision construction requirement of the ballastless track of the high-speed railway, the construction of the CPIII track control network needs stable CPIII points, a cross-sea high-speed rail multi-connected large-span bridge is influenced by the characteristics of the structure, the plane and the elevation stable points of the CPIII points cannot be organically unified, and the number of the CPIII point plane and the elevation stable points cannot meet the standard requirement; moreover, due to the influence of the cross-sea environment (wind power, sea waves and tides), the networking measurement precision is difficult to guarantee. In addition, the marine multi-connected long-span continuous beam line is long, after the CPIII plane and elevation change, the retest period of the track control network is long, and the track control network cannot be recovered in time, so that the construction of the marine ballastless track is influenced.
Disclosure of Invention
The invention mainly aims to provide a method for quickly networking a cross-sea multi-connection large-span bridge CPIII, and solves the problems that a marine multi-connection large-span continuous beam line is long, a track control network is long in retest period and cannot be restored in time after the CPIII plane and elevation change, and construction of a marine ballastless track is influenced.
In order to solve the technical problems, the technical scheme adopted by the invention is as follows: a method for quickly networking a CPIII of a cross-sea multi-link large-span bridge comprises the steps of integrally controlling the CPIII of the cross-sea multi-link large-span bridge to build a network, analyzing according to the structural form of the multi-link large-span bridge, embedding CPIII embedded parts at specific positions of a plane stable point and an elevation stable point on a beam body, and properly increasing CPIII floating points between stable points according to the distance requirement in the specification;
after the CPIII point positions of the offshore bridge are arranged, 6 pairs of CPIII points on the simply supported beams on the two coast edges are utilized to carry out integral networking on the CPIII of the offshore bridge.
The specific method for building the CPIII integral control network of the cross-sea multi-connected large-span bridge comprises the following steps:
a1, firstly, measuring off-line CPI, CPII and on-line CPI points by utilizing a GPS, and integrally measuring a track control network of the offshore multi-connection long-span bridge and CPIII on two shore side simply-supported beams after the calculation is qualified to form an integral control network;
a2, CP III control net should adopt the corner crossing method of the free survey station to carry on survey; the CP III plane net is attached to the CP I or CP II control points, one CP I or CP II control point is measured in a joint mode every 400-800 m, fixed data adjustment is adopted, and when the CP II point density and the position do not meet the CP III joint measurement requirement, the CP II control points are encrypted in the same precision interpolation mode;
a3, P III plane control network free survey station measurement takes 2 x 6 CP III points as a measurement target, and each measurement should ensure that each point is measured for 3 times;
a4, when construction interference or poor observation conditions are met, the CP III plane control network can be arranged in a cross communication mode, the distance between plane observation stations is about 60m, and each CP III control point is provided with direction and distance measurement of 4 stations.
The CP III elevation control network measuring method comprises the following steps:
and (4) piling the B1 elevation control points and the CP III elevation control points and the plane control points. When the prism center elevation leveling measurement is carried out, the measurement can be carried out only by inserting and screwing the elevation connecting rod in place, and then the accurate elevation of the measurement point represented by the prism center can be obtained by subtracting the spherical radius difference value of the elevation connecting rod.
And B2, the elevation measurement of the control points B2 and CP III is closed to the second-class leveling base point, and the elevation measurement leveling line is implemented in a circulating and surrounding mode.
The method for quickly networking the multi-connected large-span bridge CPIII comprises the following steps of quick plane networking and quick elevation networking:
the plane rapid networking method comprises the following steps:
c1, freely setting up a station for measurement by a sea-crossing bridge multi-connection large-span bridge total station and measuring the plane coordinates and elevations of all CP III points by a polar coordinate method;
c2, erecting a total station at a proper position S1 on the approach bridge to carry out free station setting measurement, measuring a CP III point pair with stable plane coordinates on the bridge, and acquiring a horizontal direction, an oblique distance and a vertical angle;
c3, calculating the station center plane coordinate, the orientation angle and the station setting precision of the freely set station S1 according to the freely set station measurement adjustment model;
c4, when the station setting precision of the station setting S1 meets the requirements of CPIII, immediately measuring the plane coordinates and the CP III point pairs with unstable elevations by adopting a polar coordinate method, and obtaining the plane coordinates of the CP III points to be measured;
and C5, similarly, moving the big mileage to the S2 position according to the steps to carry out free station setting measurement and polar coordinate method measurement of the total station, and obtaining the plane coordinate near the S2 and the CP III point pair plane coordinate with unstable elevation.
The elevation rapid networking method comprises the following steps:
the rapid re-measurement of the D1 and CP III elevations is carried out in a U-shaped leveling route mode, and the observation mode adopts a back-front mode. Closing to CP III points with stable elevation on the approach bridge close to two ends of the main beam in an attached level line form;
d2, performing field observation by using a Trimble Dini03 electronic level and a bar code leveling rod matched with the electronic level according to the technical requirements of second-class leveling measurement.
The invention provides a method for quickly networking a cross-sea multi-connection large-span bridge CPIII, which is characterized in that an integral track control network is respectively established by utilizing the elevation, plane stable points and floating points of the conventional CPIII, and the floating points of a section required by construction are interpolated at the same precision by utilizing the stable points of the integral track control network before ballastless track construction, so that the required CPIII track control network is quickly formed. The method has the advantages of good construction quality, low cost, short construction period, good economic benefit and social benefit and the like.
Drawings
The invention is further illustrated by the following examples in conjunction with the accompanying drawings:
FIG. 1 is a schematic diagram of a CPIII planar control network of the present invention;
FIG. 2 is a schematic diagram of a CPIII planar control mesh spacing of 60m in accordance with the present invention;
FIG. 3 is a schematic diagram of a CPII elevation control network of the present invention;
FIG. 4 is a CPIII point location layout diagram of the present invention
FIG. 5 is a schematic illustration of the point-plane fast repair of the present invention;
FIG. 6 is a schematic diagram illustrating rapid elevation repair of CPIII sites according to the present invention;
FIG. 7 is a flow chart of cross-sea multi-connection large-span bridge track CPIII control network construction according to the present invention;
FIG. 8 is a schematic diagram of a main bridge CP III fast retest scheme of the Bay sea-crossing bridge of the present invention;
FIG. 9 is a schematic diagram of a rapid retest CP III scheme of a Bay sea-crossing bridge rigid frame arch bridge of the invention;
FIG. 10 is a schematic diagram of a rapid retest CP III scenario for an approach bridge of a Bay sea-crossing bridge according to the present invention;
FIG. 11 is a schematic diagram of a prestressed concrete rigid frame of a bay sea-crossing bridge approach in the invention for rapidly retesting CP III solutions;
FIG. 12 is a schematic view of a rectangular CP III level measurement according to the present invention;
FIG. 13 is a schematic diagram of the distribution scheme and plane measurement of main bridges CP II and CP III of the bay sea-crossing bridge of the present invention;
Detailed Description
Example 1
As shown in fig. 1-5, a method for quickly networking a cross-sea multi-connected large-span bridge CPIII comprises the steps of constructing a network of the CPIII overall control network of the cross-sea multi-connected large-span bridge, analyzing according to the structural form of the multi-connected large-span bridge, embedding CPIII embedded parts at specific positions of a plane stable point and an elevation stable point on a beam body, and properly increasing CPIII floating points between the stable points according to the distance requirement in the specification;
after the CPIII points of the offshore bridge are arranged, 6 pairs of CPIII points on the simply supported beams on the two coast sides are utilized to carry out integral networking on the CPIII of the offshore bridge.
The specific method for building the CPIII integral control network of the cross-sea multi-connected large-span bridge comprises the following steps:
a1, firstly, measuring off-line CPI, CPII and on-line CPI points by utilizing a GPS, and integrally measuring a track control network of the offshore multi-connection long-span bridge and CPIII on two shore side simply-supported beams after the calculation is qualified to form an integral control network;
a2, CP III control net should adopt the corner crossing method of the free survey station to carry on survey; the CP III plane net is attached to the CP I or CP II control points, one CP I or CP II control point is measured in a joint mode every 400-800 m, fixed data adjustment is adopted, and when the CP II point density and the position do not meet the CP III joint measurement requirement, the CP II control points are encrypted in the same precision interpolation mode;
a3, P III plane control network free survey station measurement takes 2 x 6 CP III points as a measurement target, and each measurement should ensure that each point is measured for 3 times;
a4, when construction interference or poor observation conditions are met, the CP III plane control network can be arranged in a cross communication mode, the distance between plane observation stations is about 60m, and each CP III control point is required to measure the direction and distance of 4 stations.
The CP III elevation control network measuring method comprises the following steps:
and B1, piling the elevation control points and the plane control points of the CP III. When the elevation leveling of the prism center is carried out, the measurement can be carried out only by inserting and screwing the elevation connecting rod in place, and the accurate elevation of the measurement point represented by the prism center can be obtained by subtracting the spherical radius difference of the elevation connecting rod.
And B2, the elevation measurement of the control points B2 and CP III is closed to the second-class leveling base point, and the elevation measurement leveling line is implemented in a circulating and surrounding mode.
The method for quickly networking the multi-connected large-span bridge CPIII comprises the following steps of quick plane networking and quick elevation networking:
the plane rapid networking method comprises the following steps:
c1, freely setting up a station for measurement by a sea-crossing bridge multi-connection large-span bridge total station and measuring the plane coordinates and elevations of all CP III points by a polar coordinate method;
c2, erecting a total station at a proper position S1 on the approach bridge for free station setting measurement, measuring a CP III point pair with stable plane coordinates on the bridge, and acquiring a horizontal direction, an oblique distance and a vertical angle;
c3, calculating the station center plane coordinate, the orientation angle and the station setting precision of the freely set station S1 according to the freely set station measurement adjustment model;
c4, when the station setting precision of the station setting S1 meets the requirements of CPIII, immediately measuring the plane coordinates and the CP III point pairs with unstable elevations by adopting a polar coordinate method, and obtaining the plane coordinates of the CP III points to be measured;
and C5, similarly, moving the big mileage to the S2 position according to the steps to carry out free station setting measurement and polar coordinate method measurement of the total station, and obtaining the plane coordinate near the S2 and the CP III point pair plane coordinate with unstable elevation.
The elevation rapid networking method comprises the following steps:
the rapid re-measurement of the D1 and CP III elevations is carried out in a U-shaped leveling route mode, and the observation mode adopts a back-front mode. Closing to a CP III point with stable elevation on the approach bridge close to two ends of the main beam in an attached level line form;
d2, performing field observation by using a Trimble Dini03 electronic level and a bar code leveling rod matched with the electronic level according to the technical requirements of second-class leveling measurement.
Example 2
As further described with reference to embodiment 1, as shown in fig. 8, (1) as shown by a black solid line in fig. 8, the total station is erected at a middle position S2 of a side span 74# and a pier 75# of one side of the main bridge to perform free standing measurement, and the CP iii point pairs 3 and 4 on the approach bridge and the CP iii point pair 8 on the inner side of the cable tower are measured to obtain the horizontal direction, the skew distance and the vertical angle. And then, according to the free station setting measurement adjustment model, calculating the station center plane coordinates, the orientation angle and the station setting precision of the free station setting S2. When the station setting precision of the station setting S2 meets the requirements in the table 3-1, measuring the CP III point pairs of No. 5, no. 6 and No. 7 spans by adopting a polar coordinate method immediately, and obtaining the plane coordinates of the CP III points to be measured;
TABLE 3-1 free site set accuracy requirement
| Index (es) | Error in X coordinate | Error in Y coordinate | Error in orientation angle |
| Mean error of | ≤0.7mm | ≤0.7mm | ≤2″ |
Then, carrying out free station setting measurement and polar coordinate method measurement of a total station instrument at a position S3 near the center of the main bridge according to the steps to obtain a plane coordinate of a No. 9-15 CP III point pair; similarly, the total station free station setting measurement and the polar coordinate method measurement are carried out at the middle position S4 of the 78# pier and the 79# pier on the other side of the main bridge, and the plane coordinates of the 17, 18 and 19 # CP III point pairs can be obtained. As shown by the red dotted line in FIG. 8, the rapid re-measurement of the elevation of CP III is performed in a U-shaped leveling route mode, and the observation mode is back-front. And the upper elevation stable CP III points close to the two ends of the main beam on the approach bridge are closed in an attached level line mode. And the field observation adopts a Trimble Dini03 electronic level and a matched bar code leveling rod thereof to carry out the measurement according to the technical requirements of the second-class leveling measurement. In fig. 8, the dotted red frame is the CP iii plane coordinate starting point; the solid line blue frame is the CP III elevation starting point.
Example 2
Further described with reference to embodiment 1, as shown in fig. 9, the specific concept and operation flow of freely standing and measuring the plane coordinates and the elevation of each CP iii point by the gulf cross-sea rigid frame arch bridge total station are as follows:
(1) As shown by a black solid line in fig. 9, the total station is erected at a position S1 of a 6# and 7# pier of a side span of a rigid frame arch bridge, and free station setting measurement is performed, and a number 1, a number 2, a number 3, and a number 4 CP iii point pair on an approach bridge and a number 5 and a number 6 CP iii point pair on the rigid frame arch bridge are measured, so that a horizontal direction, an oblique distance, and a vertical angle are obtained;
(2) Then, carrying out free station setting measurement of a total station at the position S2 of the 7# pier and the 8# pier of the rigid frame arch bridge according to the steps, and measuring a No. 4 CP III point pair on the approach bridge and No. 5, 6, 7, 8 and 9 CP III point pairs on the rigid frame arch bridge to obtain the horizontal direction, the slope distance and the vertical angle;
(3) Similarly, carrying out free station setting measurement of a total station at the position S3 of the 1/3 position of the 8# pier and the 9# pier spanned on the other side of the rigid frame arch bridge, and measuring the CP III point pairs 7, 8 and 9 on the rigid frame arch bridge and the CP III point pairs 10, 11 and 12 on the approach bridge to obtain the horizontal direction, the slope distance and the vertical angle;
(4) After the 3 stations are freely set and measured, the adjustment calculation of the CP III plane control network and the triangular elevation network is carried out by adopting high-speed railway measurement data processing and adjustment calculation software (Survery Adjust V5.07) developed by the engineering group of Mitsui, II academy of China. The accuracy index is shown in tables 3-2 and 3-3.
Table 3-2 CP III main precision index after plane net constrained error
Precision index after leveling of height net in tables 3-3 CP III
| Height difference correction number (mm) | Height error (mm) | Mean error (mm) of adjacent point difference after adjustment |
| ≤2.0 | ≤4.0 | ≤1.0 |
(5) As shown by the red dotted line in FIG. 9, the rapid re-measurement of the elevation of CP III is performed in a U-shaped leveling route, and the observation mode is back-front. And the device adopts an attached level line form and is closed at CP III points with stable elevation on the approach bridge close to two ends of the main beam. And the field observation adopts a Trimble Dini03 electronic level and a matched bar code leveling rod thereof to carry out the measurement according to the technical requirements of the second-class leveling measurement. As in fig. 9: the dotted red frame is a CP III plane coordinate starting point; the solid line blue frame is the CP III elevation starting point.
Example 3
Further described with reference to embodiment 1, as shown in fig. 10 to 11, specific ideas and operation flows of freely standing and measuring and polar coordinate measuring of each CP iii point by using the total station for offshore approach bridge of bay transoceanic bridge are as follows:
(1) As shown in fig. 10 and fig. 11 by black solid lines, the total station is erected at a suitable position S1 on the approach bridge to perform free station-setting measurement, and a CP iii point pair with stable plane coordinates and elevation on the approach bridge is measured to obtain a horizontal direction, an oblique distance and a vertical angle. And then, according to the free station setting measurement adjustment model, calculating the station center plane coordinates, the orientation angle and the station setting precision of the free station S1. When the station setting precision of the station setting S1 meets the requirements in the table 3-1, measuring the plane coordinates and the CP III point pairs with unstable elevations by adopting a polar coordinate method immediately, and obtaining the plane coordinates of the CP III points to be measured;
(2) Similarly, moving the big distance to the S2 position according to the steps, and performing free station setting measurement and polar coordinate method measurement on the total station, so as to obtain the plane coordinate and elevation unstable CP III point-to-plane coordinate near the S2.
(3) As shown by red dotted lines in fig. 10 and 11, the CP iii elevation rapid re-measurement is performed in a U-shaped leveling route manner, and the observation manner is back-front. And the device adopts an attached level line form and is closed at CP III points with stable elevation on the approach bridge close to two ends of the main beam. And the field observation adopts a Trimble Dini03 electronic level and a matched bar code leveling rod thereof to carry out the measurement according to the technical requirements of the second-class leveling measurement.
The method for rapidly repairing the CP III point plane coordinate and elevation of the cross-sea bridge main bridge, the rigid frame arch bridge and the offshore approach bridge is consistent with the conventional measurement, and a CP III point plane coordinate and elevation measurement comparison experiment is designed in the section.
According to the measurement mesh shown in fig. 12 and 13, the CP iii point plane coordinates and elevation data are collected once every 6 hours according to the rapid and conventional measurement methods, and total 6-stage data (18 p.m. later to 6 p.m. earlier on the third day) are collected. Since the bay sea-crossing bridge deforms under the influence of temperature, the measurement of the CP III plane and the elevation net is completed in the shortest time possible on the premise of ensuring the field measurement accuracy. The plan adopts two come cards TS60 intelligent total stations and two Tianbao electronic levels to carry out conventional measurement from the operation mode of measuring two ends of a measuring section in opposite directions simultaneously so as to ensure the reliability and the precision of CP III plane and elevation measurement results.
The method for rapidly repairing the CP III point plane coordinate and elevation of the cross-sea bridge main bridge, the rigid frame arch bridge and the offshore approach bridge is consistent with the conventional measurement, and a CP III point plane coordinate and elevation measurement comparison experiment is designed in the section. According to the measurement mesh shown in fig. 12 and 13, the CP iii point plane coordinates and elevation data are collected once every 6 hours according to the rapid and conventional measurement methods, and total 6-stage data (18 p.m. later to 6 p.m. earlier on the third day) are collected. Since the quanzhou bay sea-crossing bridge deforms under the influence of temperature, the measurement of the CP III plane and elevation net is completed in the shortest time possible on the premise of ensuring the field measurement accuracy. The plan adopts two come cards TS60 intelligent total stations and two Tianbao electronic levels to carry out conventional measurement from the operation mode of measuring two ends of a measuring section in opposite directions simultaneously so as to ensure the reliability and the precision of CP III plane and elevation measurement results.
The above-described embodiments are merely preferred embodiments of the present invention, and should not be construed as limiting the present invention, and the scope of the present invention is defined by the claims, and includes equivalents of technical features described in the claims. I.e., equivalent alterations and modifications within the scope hereof, are also intended to be within the scope of the invention.
Claims (5)
1. A method for quickly networking a cross-sea multi-connected large-span bridge CPIII is characterized by comprising the following steps:
the method comprises the steps of establishing a net for a CPIII integral control net of a sea-crossing multi-connected large-span bridge, analyzing according to the structural form of the multi-connected large-span bridge, embedding CPIII embedded parts at specific positions of a plane stable point and an elevation stable point on a beam body, and properly increasing CPIII floating points between the stable points according to the distance requirement in the specification;
after the CPIII points of the offshore bridge are arranged, 6 pairs of CPIII points on the simply supported beams on the two coast sides are utilized to carry out integral networking on the CPIII of the offshore bridge.
2. The method for cross-sea multi-connected large-span bridge CPIII rapid networking according to claim 1, which is characterized in that:
the specific method for building the CPIII integral control network of the cross-sea multi-connected large-span bridge comprises the following steps:
a1, firstly, measuring off-line CPI, CPII and on-line CPI points by utilizing a GPS, and integrally measuring a track control network of the offshore multi-connection long-span bridge and CPIII on two shore side simply-supported beams after the calculation is qualified to form an integral control network;
a2, CP III control network should adopt the corner crossing method of the free survey station to carry on the survey; the CP III plane net is attached to the CP I or CP II control points, one CP I or CP II control point is measured in a joint mode every 400-800 m, fixed data adjustment is adopted, and when the CP II point density and the position do not meet the CP III joint measurement requirement, the CP II control points are encrypted in the same precision interpolation mode;
a3, P III plane control network free survey station measurement takes 2 x 6 CP III points as a measurement target, and each measurement should ensure that each point is measured for 3 times;
a4, when construction interference or poor observation conditions are met, the CP III plane control network can be arranged in a cross communication mode, the distance between plane observation stations is about 60m, and each CP III control point is provided with direction and distance measurement of 4 stations.
3. The method for cross-sea multi-connected large-span bridge CPIII rapid networking according to claim 2, which is characterized in that: the CP III elevation control network measuring method comprises the following steps:
b1, piling the elevation control points and the plane control points of the CP III;
when the elevation leveling of the prism center is carried out, the measurement can be carried out only by inserting and screwing the elevation connecting rod in place, and the accurate elevation of the measurement point represented by the prism center can be obtained by subtracting the spherical radius difference of the elevation connecting rod;
the elevation measurement of the control points B2 and CP III is closed to the base point of the second-class leveling, and the elevation measurement leveling line is implemented in a circulating and surrounding mode.
4. The method for cross-sea multi-connected large-span bridge CPIII rapid networking according to claim 1, which is characterized in that: the method for quickly networking the multi-connected large-span bridge CPIII comprises the following steps of quick plane networking and quick elevation networking:
the plane rapid networking method comprises the following steps:
c1, freely setting up a station for measurement by a sea-crossing bridge multi-connection large-span bridge total station and measuring the plane coordinates and elevations of all CP III points by a polar coordinate method;
c2, erecting a total station at a proper position S1 on the approach bridge to carry out free station setting measurement, measuring a CP III point pair with stable plane coordinates on the bridge, and acquiring a horizontal direction, an oblique distance and a vertical angle;
c3, calculating the station center plane coordinate, the orientation angle and the station setting precision of the freely set station S1 according to the freely set station measurement adjustment model;
c4, when the station setting precision of the station setting S1 meets the requirements of CPIII, immediately measuring the plane coordinates and the CP III point pairs with unstable elevations by adopting a polar coordinate method, and obtaining the plane coordinates of the CP III points to be measured;
and C5, similarly, moving the big mileage to the S2 position according to the steps to carry out free station setting measurement and polar coordinate method measurement of the total station, and obtaining the plane coordinate near the S2 and the CP III point pair plane coordinate with unstable elevation.
5. The method for cross-sea multi-connected large-span bridge CPIII rapid networking according to claim 4, which is characterized in that: the elevation rapid networking method comprises the following steps:
d1, CP III elevation rapid retest is carried out by adopting a U-shaped leveling route form, and the observation mode adopts a back-front mode;
closing to a CP III point with stable elevation on the approach bridge close to two ends of the main beam in an attached level line form;
d2, performing field observation by using a Trimble Dini03 electronic level and a bar code leveling rod matched with the electronic level according to the technical requirements of second-class leveling measurement.
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