CN111945564A - Construction method and construction system for jacking frame bridge - Google Patents
Construction method and construction system for jacking frame bridge Download PDFInfo
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- CN111945564A CN111945564A CN202010763967.0A CN202010763967A CN111945564A CN 111945564 A CN111945564 A CN 111945564A CN 202010763967 A CN202010763967 A CN 202010763967A CN 111945564 A CN111945564 A CN 111945564A
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D21/00—Methods or apparatus specially adapted for erecting or assembling bridges
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01C—MEASURING DISTANCES, LEVELS OR BEARINGS; SURVEYING; NAVIGATION; GYROSCOPIC INSTRUMENTS; PHOTOGRAMMETRY OR VIDEOGRAMMETRY
- G01C15/00—Surveying instruments or accessories not provided for in groups G01C1/00 - G01C13/00
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S19/00—Satellite radio beacon positioning systems; Determining position, velocity or attitude using signals transmitted by such systems
- G01S19/38—Determining a navigation solution using signals transmitted by a satellite radio beacon positioning system
- G01S19/39—Determining a navigation solution using signals transmitted by a satellite radio beacon positioning system the satellite radio beacon positioning system transmitting time-stamped messages, e.g. GPS [Global Positioning System], GLONASS [Global Orbiting Navigation Satellite System] or GALILEO
- G01S19/42—Determining position
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Abstract
The application relates to a construction method and a construction system for jacking a frame bridge, and relates to the field of frame bridge construction. The GPS coordinates are used as a reference datum of the position, and the initial coordinates of the first prism capable of reflecting the position of the frame bridge are recorded, so that the actual coordinates of the first prism can be accurately calculated by combining the measurement data of the total station after each jacking is finished. And then, the actual jacking distance of the frame bridge is obtained by comparing the initial coordinate with the actual coordinate, so that the design coordinate more fitting the actual situation can be obtained to be compared with the actual coordinate, the measurement error is small, the selection of the comparison data is more reasonable, the generated error is also smaller, and the automation degree of the measurement work is high.
Description
Technical Field
The application relates to the field of frame bridge construction, in particular to a construction method and a construction system for jacking a frame bridge.
Background
With the rapid development of urban construction, the traffic volume is also increasing continuously. When an original railway and a subsequently planned road cross, it is a common practice to build a frame bridge under the railway. The frame bridge has a plurality of bridge openings that can interface with a highway, while the frame bridge itself can support a railway.
The construction method commonly used at present is a jacking method, a large foundation pit is firstly dug in foundation soil on one side of an existing railway, a frame bridge is prefabricated in the foundation pit, then the railway is temporarily fixed, the frame bridge is jacked towards the lower part of the railway, and earthwork with one end blocked on a jacking road of the frame bridge is dug every certain distance.
In the jacking construction process of the bridge body of the frame bridge, the direction deviation is easily generated in the jacking process of the bridge body, and the trouble is brought to engineering construction. In the traditional construction, the position of the frame bridge is manually measured after each jacking, but the precision of manual detection is low, errors of multiple times after multiple jacking are stacked together to easily form larger deviation, and the difficulty of correcting the deviation is higher at the moment.
Disclosure of Invention
In order to improve the jacking precision of the frame bridge, the application provides a construction method and a construction system for jacking the frame bridge.
In a first aspect, the present application provides a construction method for jacking a frame bridge, which adopts the following technical scheme:
a construction method for jacking a frame bridge comprises the following steps:
step S1, at least four mounting columns are poured near a construction site, receivers are mounted on the mounting columns to receive satellite signals, and GPS coordinates corresponding to the mounting columns are obtained through the satellite signals;
step S2, replacing the receiver on one of the mounting posts with a total station, mounting a plurality of first prisms on the frame bridge, sequentially measuring the distances and angles from all the first prisms to the total station by the total station, and calculating initial coordinates corresponding to all the first prisms;
step S3, the frame bridge is jacked for multiple times, after each jacking, the total station remeasures the distance and the angle of the first prism, calculates the actual coordinate corresponding to the current first prism, compares the actual coordinate with the design coordinate prestored in the database, continues the next jacking if the actual coordinate is in accordance with the design coordinate, and jumps to step S4 if the actual coordinate is not in accordance with the design coordinate;
and step S4, correcting the advancing route of the frame bridge according to the deviation amount of the actual coordinate and the design coordinate, and returning to the step S3 after the correction is finished.
Through adopting above-mentioned technical scheme, utilize the GPS coordinate as the reference of position, and the initial coordinate of the first prism that the record can reflect the frame bridge position, make after jacking at every turn, combine the measured data of total powerstation, can accurate calculation first prism's actual coordinate, again through the contrast with initial coordinate, acquire the actual jacking distance of frame bridge, thereby can obtain the design coordinate of more laminating actual conditions and come to contrast with actual coordinate, measuring error is little, the selection of contrast data is more reasonable, the error that produces is also just also littleer, and measure the degree of automation height of work.
Preferably, in step S2, the receivers on the mounting columns except the mounting column where the total station is located are replaced by second prisms; in step S3, after each jacking operation is finished, the total station acquires actual coordinates of the total station according to the distance and angle between the second prism and the total station, and then the total station measures the distance of the first prism.
By adopting the technical scheme, after jacking is completed each time, the position of the total station is possibly influenced by construction and changed, but the total station can recalculate the actual coordinate of the total station through calibration with the second prism, so that the accurate actual coordinate of the total station can be used as a reference point when the actual coordinate of the first prism is calculated, and the detection precision is further improved.
Preferably, step S2 further includes setting a level group on the frame bridge; in step S3, the electrical level gauge measures the angle of the frame bridge, calculates the current height of the frame bridge and compares the calculated height with the design value in the database, and if the current height of the frame bridge does not meet the design value of the height in the database, the process goes to step S4.
Through adopting above-mentioned technical scheme, though also can detect the height of frame bridge through the total powerstation, because the angular relation, in order to let the total powerstation observe, the mounted position of first prism can not be too close to the head of frame bridge for the measurement of total powerstation can not be accurate, consequently need dispose the angle that the angle of electric leveling instrument group measured frame bridge relative horizontal plane, calculate the height value of frame bridge head according to the angle again.
Preferably, in step S2, the frame bridge is further provided with a third prism, the third prism corresponds to the electric level group, the total station measures the positions of the third prism and the electric level group, and establishes a relationship between the third prism and the corresponding electric level group in position according to the measurement data;
in step S3, after the jacking is completed, the total station remeasures the angle and the distance between the total station and the third prism, calculates the actual coordinate of the third prism, determines the position of the electric leveling instrument group according to the actual coordinate of the third prism, and obtains the distance of the electric leveling instrument group in the jacking direction to calculate the height value of the frame bridge.
By adopting the technical scheme, when the frame bridge deflects to the horizontal direction, the electric leveling instrument group also can correspondingly deflect, and the angle value measured by the electric leveling instrument group cannot be directly multiplied by the distance between the head and the tail of the frame bridge to obtain the height difference, so that the more accurate jacking distance corresponding to the third prism can be obtained by arranging the third prism like the measuring mode of the first prism, and the more accurate height value of the frame bridge is obtained to be used for comparing with the design value.
Preferably, the acquisition mode of the design coordinates in the database is as follows: in step S2, ranging the first prism through the total station to obtain an initial coordinate corresponding to the first prism; in step S3, the total station measures the distance of the first prism after the jacking to obtain the current actual coordinates; and calculating the jacking distance of the actual coordinate and the initial coordinate in the advancing direction of the frame bridge, and acquiring a design coordinate corresponding to the jacking distance from the database.
By adopting the above technical scheme, the jacking distance is not determined according to the advancing distance displayed by the driving device for driving the frame bridge, but the actual advancing distance of the frame bridge is determined by measuring, so that the measuring precision can be further improved.
In a second aspect, the present application provides a construction system for frame bridge jacking, which adopts the following technical scheme:
a construction system for jacking a frame bridge comprises a plurality of first prisms installed on the frame bridge, wherein a total station for detecting the positions of the first prisms is arranged outside the end part, far away from a railway, of the frame bridge; the system comprises a frame bridge, a total station and a server, wherein the server is internally provided with a database, the database stores design coordinates of the frame bridge after each jacking in the jacking process, the server is coupled with the total station to receive the distance and the angle between the total station and a first prism, the distance and the angle are detected by the total station, the current actual coordinates and the current jacking distance of the first prism are calculated by combining the pre-stored initial coordinates of the first prism, and the server compares the actual coordinates and the design coordinates of the first prism at the current jacking distance to judge whether the jacking of the frame bridge meets the design requirements.
Preferably, the total station further comprises a plurality of mounting columns, one of the mounting columns is close to the frame bridge, the other mounting columns are far away from the frame bridge, the total station is mounted on the mounting column close to the frame bridge, the other mounting columns are provided with second prisms, and each second prism has a corresponding GPS coordinate.
Preferably, all install electric level chi group on the inner wall of two cavities that are located both sides outside respectively on the frame bridge, electric level chi group is the level setting, and the both ends of electric level chi group are towards the both ends of frame bridge respectively, the server is coupled in electric level chi group in order to receive height value and the angle that electric level chi group detected.
Preferably, four third prisms are further installed on the frame bridge, every two third prisms correspond to the two electric leveling instrument groups respectively, and the two third prisms in the same group are installed on the inner wall of the frame bridge close to the two ends of the corresponding electric leveling instrument group respectively.
In summary, the present application includes at least one of the following beneficial technical effects:
1. the position of the jacked frame bridge is measured in real time and automatically, and compared with the designed frame bridge route, so that workers can correct the deviation of the frame bridge conveniently, and the construction precision is higher;
2. after each jacking, the total station firstly re-determines the coordinates of the total station and then measures the distance between the total station and the first prism, so that the obtained actual coordinates of the first prism representing the position of the frame bridge can be more accurate;
3. through setting up electric leveling ruler group and third prism, can acquire the value of height of frame bridge more accurately, have better detection effect to the deviation of frame bridge in the direction of height.
Drawings
FIG. 1 is a block flow diagram of an embodiment of the present application.
Fig. 2 is a system block diagram of an embodiment of the present application.
Description of reference numerals: 1. a server; 2. a first prism; 3. a second prism; 4. a third prism; 5. an electric leveling ruler; 6. a total station.
Detailed Description
The present application is described in further detail below with reference to figures 1-2.
The embodiment of the application discloses a construction method for jacking a frame bridge, which comprises the following steps with reference to fig. 1:
and step S1, acquiring GPS coordinates.
And pouring four mounting columns by cement near the construction site, wherein one mounting column is close to the construction site and is positioned on the central line of the frame bridge in the length direction, and the rest mounting columns are far away from the construction site. And a forced centering disc is arranged at the top of each mounting column in the pouring process. And after the mounting column is formed, a receiver is mounted on the forced centering disc, and the receiver is a Huazhong X900GPS receiver. The four receivers receive signals sent by four GPS satellites together, the received satellite signals are transmitted to the server 1, and the server 1 calculates the signals to obtain GPS coordinates corresponding to the positions of the receivers one by one.
Step S2, acquisition of initial coordinates.
The receiver is detached from the mounting post, the total station 6 is mounted on the forced centering disc of the mounting post next to the frame bridge, and the second prism 3 is mounted on the forced centering disc of the remaining mounting post.
Meanwhile, a plurality of first prisms 2, four third prisms 4 and two groups of electric leveling rule groups are installed on the frame bridge, the two groups of electric leveling rule groups are respectively fixed on the inner wall of the bridge opening on the outermost side of the two sides of the frame bridge, every two third prisms 4 respectively correspond to the two groups of electric level cells and are installed in the corresponding bridge openings, and the two third prisms 4 of the same group are respectively close to the two ends of the corresponding electric level cells. A number of first prisms 2 are mounted in further bridge openings of the frame bridge.
After commissioning, the first prism 2, the second prism 3 and the third prism 4 can all be measured by the total station 6. The total station 6 firstly adopts a manual operation mode to measure the positions of two ends of the electric leveling ruler group, then the total station 6 sequentially measures the distances and angles from all the first prisms 2 and the third prisms 4 to the total station 6, and calculates the initial coordinates corresponding to the first prisms 2 and the third prisms 4 according to the GPS coordinates of the positions of the total station 6. According to the distance and the angle from the third prism 4 to the total station 6 and the distance and the angle from the end of the electric level group to the total station 6, the position of the end of the corresponding electric level group can be calculated through the coordinates of the two third prisms 4 in the same group.
And step S3, pushing the frame bridge.
The jacking of the frame bridge needs to be carried out for multiple times, and when the frame bridge just starts to jack, the frame bridge is far away from a railway, a sliding table can be installed in the jacking direction of the frame bridge, so that the frame bridge can move through the sliding table. The frame bridge at this moment is difficult to deviate in the height direction, and whether the deviation occurs in the movement of the frame bridge is mainly detected by the horizontal plane detection of the total station 6. And after the frame bridge is close to the railway, the space between the frame bridge and the railway is limited, which is not beneficial to the laying of the sliding table, the frame bridge directly slides on the excavated ground, at the moment, the frame bridge is influenced by the actual construction precision, the frame bridge is easy to have deviation in height, at the moment, the measurement of the electric leveling instrument group is taken as the main point, and the total station 6 plays a role in auxiliary detection.
In addition, since the total station 6 is close to the construction site, in the process of jacking the frame bridge, the land near the installation column where the total station 6 is located may move, which causes the installation column to incline, and the total station 6 will move away from the original GPS coordinates. Therefore, the total station 6 needs to measure its actual coordinates again after each jacking of the frame bridge. The specific measurement mode of the actual coordinates of the total station 6 is as follows: the total station 6 observes each second prism 3 using a horizontal angular direction observation method to confirm the distance and angle between the total station 6 and the second prism 3. In the case that the second prism 3 is not likely to move, the current actual coordinates of the total station 6 may be back-derived from the GPS coordinates of the second prism 3.
And when the total station 6 determines the actual coordinates of the total station 6 again, the total station 6 sequentially measures the first prism 2 on the frame bridge, and the actual coordinates of the first prism 2 are calculated according to the actual coordinates of the total station 6 and the measured data. The actual coordinates of the first prism 2 are compared with the initial coordinates of the first prism 2, the distance of the first prism 2 moving in the specified jacking direction of the frame bridge is calculated, the calculated distances of all the first prisms 2 are weighted and averaged, and the averaged distance can represent the actual jacking distance of the frame bridge. And matching the design jacking distance with the closest numerical value in the database according to the actual jacking distance of the frame bridge, and then adjusting the design coordinate of the first prism 2 corresponding to the closest design jacking distance. Comparing the actual coordinate and the designed coordinate of the first prism 2, and if the two coordinates are overlapped or the deviation is within the error allowable range, the staff can continue to carry out next jacking; if the deviation between the two coordinates is too large, the jacking operation needs to be suspended and the process proceeds to step S4.
The total station 6 completes the measurement of the first prism 2 and then measures the third prism 4. The four third prisms 4 respectively obtain the jacking distances of the two sides of the frame bridge, then the height difference of the front end part and the rear end part of the frame bridge is calculated according to the jacking distances and the angles measured by the corresponding electric leveling rule groups, then the height value of the front part of the frame bridge is calculated by combining the height values in the actual coordinates of the third prisms 4, and finally the height value is compared with the designed height value in the database. If the actual height deviation amount is larger than the designed height in the database, the process also proceeds to step S4.
Step S4, route correction.
The forward route of the frame bridge is corrected based on the deviation amount between the actual coordinates and the design coordinates, that is, the route is calculated again, the forward route of the frame bridge is laid according to the calculated route so that the frame bridge can return to the preset forward track, and the process returns to step S3 after the correction operation is finished.
The embodiment of the application also discloses a construction system for jacking the frame bridge, which is shown in fig. 2 and comprises a server 1, a plurality of mounting columns on one side of the frame bridge, a plurality of first prisms 2 mounted on the frame bridge, two groups of electric leveling ruler groups and four third prisms 4. The first prism 2 and the third prism 4 have the same structure, except that the first prism 2 is installed in a bridge opening in the middle of the frame bridge, and the third prisms 4 are installed in the outermost bridge openings on both sides of the frame bridge in pairs. The two groups of electric leveling ruler groups are also respectively installed in the bridge opening on the outermost side of the two sides of the frame bridge. The two third prisms 4 on the same side are respectively close to the two ends of the electric leveling rod group on the corresponding side. Each group of electric leveling ruler groups is formed by connecting a plurality of electric leveling rulers 5 which are parallel to each other end to end, and the two ends of the whole electric leveling ruler group face the two ends of the frame bridge along the horizontal direction respectively.
There are at least four mounting posts, and one mounting post needs to be close to the frame bridge, and the rest mounting posts are arranged far away from the frame bridge. And a total station 6 is arranged on the mounting column close to the frame bridge, and second prisms 3 are arranged on the other mounting columns, and each second prism 3 has a corresponding GPS coordinate. The total station 6 is an intelligent total station 6, which not only can automatically drive the sighting part and the telescope of the total station 6 to rotate, but also can automatically complete the identification, sighting and measurement of a plurality of targets under the condition of no human intervention.
The server 1 is coupled to the total station 6 and each electronic level, respectively, to obtain data measured by the total station 6 and data measured by the electronic level. The server 1, the total station 6 and the electronic level ruler can be connected by data lines or can transmit data in a wireless communication mode. And after the server 1 completes data analysis and processing of the total station 6 or the electronic level, the server 1 transmits a result to an intelligent terminal in a data diagram form, wherein the intelligent terminal comprises a mobile phone and a computer.
The server 1 is provided with a database, and the database is pre-stored with a jacking route designed by the frame bridge, the initial coordinate of the first prism 2, the GPS coordinate of the second prism 3 and the initial coordinate of the third prism 4. When receiving the data transmitted by the total station 6, the server 1 calculates the actual coordinates of the total station 6 according to the distance and the angle between the total station 6 and the second prism 3, and then calculates the actual coordinates of the first prism 2 according to the actual coordinates of the total station 6, the distance and the angle between the total station 6 and the first prism 2, and similarly, the actual coordinates of the third prism 4 can also be obtained. The server 1 analyzes the actual coordinate and the initial coordinate of the first prism 2 again to obtain the jacking distance based on the first prism 2, obtains the preset coordinate of the corresponding first prism 2 under the jacking distance from the database, and compares the actual coordinate and the design coordinate of the first prism 2 to judge whether the jacking of the frame bridge meets the design requirement.
The above embodiments are preferred embodiments of the present application, and the protection scope of the present application is not limited by the above embodiments, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.
Claims (9)
1. A construction method for jacking a frame bridge is characterized by comprising the following steps:
step S1, at least four mounting columns are poured near a construction site, receivers are mounted on the mounting columns to receive satellite signals, and GPS coordinates corresponding to the mounting columns are obtained through the satellite signals;
step S2, replacing a receiver on one of the mounting columns with a total station (6), mounting a plurality of first prisms (2) on the frame bridge, sequentially measuring the distances and angles from all the first prisms (2) to the total station (6) by the total station (6), and calculating initial coordinates corresponding to all the first prisms (2);
step S3, jacking the frame bridge for multiple times, after each jacking, re-measuring the distance and the angle of the first prism (2) by the total station (6), calculating the actual coordinate corresponding to the current first prism (2), comparing the actual coordinate with the design coordinate prestored in the database, if the actual coordinate is in accordance with the design coordinate, continuing the next jacking, and if the actual coordinate is not in accordance with the design coordinate, jumping to step S4;
and step S4, correcting the advancing route of the frame bridge according to the deviation amount of the actual coordinate and the design coordinate, and returning to the step S3 after the correction is finished.
2. The construction method for jacking a frame bridge according to claim 1, wherein: in the step S2, all receivers on the mounting columns except the mounting column where the total station (6) is located are replaced by second prisms (3); in step S3, after each jacking operation is finished, the total station (6) acquires the actual coordinates of the total station (6) according to the distance and the angle between the second prism (3) and the total station (6), and then the total station (6) measures the distance of the first prism (2).
3. The construction method for jacking a frame bridge according to claim 1, wherein: step S2 also includes setting electric leveling rule group on the frame bridge; in step S3, the electrical level gauge measures the angle of the frame bridge, calculates the current height of the frame bridge and compares the calculated height with the design value in the database, and if the current height of the frame bridge does not meet the design value of the height in the database, the process goes to step S4.
4. The construction method for jacking a frame bridge as claimed in claim 3, wherein:
in the step S2, a third prism (4) is further mounted on the frame bridge, the third prism (4) corresponds to the electric level group, the total station (6) measures the positions of the third prism (4) and the electric level group respectively, and then the relation between the positions of the third prism (4) and the corresponding electric level group is established according to the measured data;
in step S3, after the jacking is completed, the total station (6) remeasures the angle and the distance between the total station and the third prism (4), calculates the actual coordinate of the third prism (4), confirms the position of the electric level group according to the actual coordinate of the third prism (4), and obtains the distance of the electric level group in the jacking direction to calculate the height value of the frame bridge.
5. The construction method for jacking a frame bridge as claimed in claim 3, wherein: the acquisition mode of the design coordinates in the database is as follows: in step S2, ranging the first prism (2) through the total station (6) to obtain an initial coordinate corresponding to the first prism (2); in step S3, the first prism (2) after being jacked is measured by the total station (6) to obtain the current actual coordinates; and calculating the jacking distance of the actual coordinate and the initial coordinate in the advancing direction of the frame bridge, and acquiring a design coordinate corresponding to the jacking distance from the database.
6. The utility model provides a construction system that frame bridge pushed up which characterized in that: the system comprises a plurality of first prisms (2) arranged on a frame bridge, wherein a total station (6) for detecting the position of the first prisms (2) is arranged outside the end part of the frame bridge far away from the railway; the device comprises a total station (6), a server (1) and a judging unit, wherein the server (1) is provided with a database, the database stores design coordinates of the frame bridge after each jacking in the jacking process, the server (1) is coupled with the total station (6) to receive the distance and the angle between the total station (6) and the first prism (2), the prestored initial coordinates of the first prism (2) are combined to calculate the current actual coordinates and the current jacking distance of the first prism (2), and the server (1) compares the actual coordinates and the design coordinates of the first prism (2) at the current jacking distance to judge whether the jacking of the frame bridge meets the design requirements.
7. The frame bridge jacking construction system of claim 6, wherein: still include a plurality of erection columns, one of them erection column is close to the frame bridge, and other erection columns keep away from the frame bridge setting, install on the erection column that is close to the frame bridge total powerstation (6), install second prism (3) on other erection columns, every second prism (3) all have corresponding GPS coordinate.
8. The frame bridge jacking construction system of claim 6, wherein: all install electric level chi group on the inner wall of two bridge openings that are located the both sides outside on the frame bridge respectively, electric level chi group is the level and sets up, and the both ends of electric level chi group are towards the both ends of frame bridge respectively, server (1) is coupled in order to receive height value and the angle that electric level chi group detected in electric level chi group.
9. The frame bridge jacking construction system of claim 8, wherein: still install four third prisms (4) on the frame bridge, two liang of third prisms (4) correspond with two electric leveling ruler groups respectively, and two third prisms (4) of the same group are installed respectively on being close to the frame bridge inner wall at the both ends of corresponding electric leveling ruler group.
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| CN112710352A (en) * | 2020-12-23 | 2021-04-27 | 广西大学 | Intelligent monitoring system for pushing process of frame bridges and culverts |
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| 彭成山: "测量机器人在框架桥顶进过程中跟踪测量的应用", 《建筑技术开发》 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112710352A (en) * | 2020-12-23 | 2021-04-27 | 广西大学 | Intelligent monitoring system for pushing process of frame bridges and culverts |
| CN112710352B (en) * | 2020-12-23 | 2022-09-02 | 广西大学 | Intelligent monitoring system for pushing process of frame bridges and culverts |
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|---|---|
| CN111945564B (en) | 2021-11-30 |
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