CN113866803A - Method for correcting positioning inclination error of immersed tube installation measuring tower - Google Patents
Method for correcting positioning inclination error of immersed tube installation measuring tower Download PDFInfo
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- CN113866803A CN113866803A CN202111134289.2A CN202111134289A CN113866803A CN 113866803 A CN113866803 A CN 113866803A CN 202111134289 A CN202111134289 A CN 202111134289A CN 113866803 A CN113866803 A CN 113866803A
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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
- G01S19/40—Correcting position, velocity or attitude
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01C—MEASURING DISTANCES, LEVELS OR BEARINGS; SURVEYING; NAVIGATION; GYROSCOPIC INSTRUMENTS; PHOTOGRAMMETRY OR VIDEOGRAMMETRY
- G01C21/00—Navigation; Navigational instruments not provided for in groups G01C1/00 - G01C19/00
- G01C21/005—Navigation; Navigational instruments not provided for in groups G01C1/00 - G01C19/00 with correlation of navigation data from several sources, e.g. map or contour matching
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01C—MEASURING DISTANCES, LEVELS OR BEARINGS; SURVEYING; NAVIGATION; GYROSCOPIC INSTRUMENTS; PHOTOGRAMMETRY OR VIDEOGRAMMETRY
- G01C25/00—Manufacturing, calibrating, cleaning, or repairing instruments or devices referred to in the other groups of this subclass
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01C—MEASURING DISTANCES, LEVELS OR BEARINGS; SURVEYING; NAVIGATION; GYROSCOPIC INSTRUMENTS; PHOTOGRAMMETRY OR VIDEOGRAMMETRY
- G01C9/00—Measuring inclination, e.g. by clinometers, by levels
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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
- G01S19/45—Determining position by combining measurements of signals from the satellite radio beacon positioning system with a supplementary measurement
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- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
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Abstract
The invention belongs to the technical field of engineering measurement, and particularly relates to a method for correcting positioning inclination errors of a immersed tube installation measuring tower. The method for correcting the positioning inclination error of the immersed tube installation measuring tower comprises the steps of initial calibration of the attitude of a tube joint, installation of inclinometer equipment, calibration of the attitude of the measuring tower, correction of the positioning inclination error of the measuring tower and the like. The invention respectively installs an inclinometer on the top of the measuring tower and the top of the pipe at the head and the tail ends of the pipe joint, and determines the postures and the mutual relation of the measuring tower and the pipe joint by combining with the in-pipe inclinometer, realizes the real-time monitoring of the posture change of the measuring tower in the process of sinking the pipe joint, realizes the real-time automatic prompt and the man-machine interactive real-time correction of the positioning inclination error of the measuring tower, improves the positioning precision and the reliability of the measuring tower, and ensures the mounting precision of the sinking pipe.
Description
Technical Field
The invention belongs to the technical field of engineering measurement, and particularly relates to a method for correcting positioning inclination errors of a immersed tube installation measuring tower.
Background
In recent years, with the development of society, large immersed tube tunnels crossing sea channels are emerging continuously, the construction scale of the immersed tube tunnels is larger and larger, the quantity of immersed tubes is also larger and larger, and the requirement on installation accuracy is also higher and higher. The immersed tube installation measuring tower method is a modern measuring method combining GNSS measurement and an underwater measurement positioning technology, mainly comprises GNSS measurement, inclinometer correction, a data processing system and the like, has the characteristics of high precision, high reliability, simple and easy operation and the like, and is widely used in the construction of a Hongkao bridge, a deep-middle channel, a large-bay tunnel and a Nanchang red valley tunnel.
However, in the process of sinking and butting the immersed tube joints, under the combined action of the continuously increased load of the water tank in the tube and the surrounding water pressure, the tube joints inevitably deform wholly or locally, so that the relative geometric positions of the measuring tower and the tube joints are slightly changed, and the positioning accuracy of the measuring tower is influenced. Once the positioning accuracy of the measuring tower is affected, the construction quality is reduced, even the immersed tube installation fails, the engineering cost is increased, the construction period is prolonged, and the method becomes a major risk point of engineering.
Disclosure of Invention
Aiming at the defects in the related art, the invention provides a method for correcting the positioning inclination error of a immersed tube installation measuring tower, which is used for improving the positioning precision of the measuring tower, reducing the risk of immersed tube butt joint measurement and control and ensuring the immersed tube installation precision.
The invention provides a method for correcting positioning inclination error of a immersed tube installation measuring tower, which comprises the following steps:
initial calibration of the attitude of the pipe joint: in the dry dock area, an in-pipe inclinometer is installed inside the pipe joint, and the initial inclination value of the pipe joint is read;
installation of an inclinometer device: moving the pipe joint to a deep dock area, respectively installing a measuring tower at the head end and the tail end of the top surface of the pipe joint, respectively installing a tower top inclinometer on the tower tops of the two measuring towers, and respectively installing a pipe top inclinometer on the top surface of the pipe joint corresponding to the tower bottoms of the two measuring towers;
calibrating the attitude of the measuring tower: calibrating the attitude of the pipe joint for the second time, and initializing the attitude of the measuring tower;
correcting positioning inclination errors of the measuring tower: during the sinking period of the pipe joints, a measurement and control system of the measuring tower monitors the attitude data of the measuring tower in real time; if the monitoring data is out of limit, the measurement and control system automatically prompts whether to correct; and if the monitoring data is normal, continuing to sink the pipe joint, and continuing to monitor the attitude data of the measuring tower by the measurement and control system.
According to the technical scheme, the inclinometers are additionally arranged on the top of the measuring tower and the top of the pipe at the head end and the tail end of the pipe joint respectively, the inclinometers and the pipe joint are combined to determine the postures and the mutual relations of the measuring tower and the pipe joint, the posture change of the measuring tower is monitored in real time in the sinking process of the pipe joint, the positioning inclination error of the measuring tower is automatically prompted in real time and corrected in a man-machine interactive mode in real time, the positioning accuracy and the reliability of the measuring tower are improved, and the sinking pipe installation accuracy is guaranteed.
In some embodiments, in the step of measuring the tower attitude calibration, when the attitude of the pipe joint is calibrated for the second time, the inclination data of the in-pipe inclinometer is firstly read, and then the current actual inclination change of the pipe joint is calculated by combining the initial inclination value of the pipe joint. The technical scheme realizes secondary calibration of the attitude of the pipe joint and reveals the attitude change of the pipe joint.
In some embodiments, when reading the tilt data of the in-tube inclinometer, in order to prevent the data of the in-tube inclinometer from being zero-shifted, the method further comprises the following steps:
equipment installation: erecting a level gauge at the center of the top surface of the pipe joint, and respectively arranging a characteristic point at each of four corners of the top surface of the pipe joint;
and (3) data correction: measuring the relative elevations of the four characteristic points through a level, and calculating the actual inclination value of the pipe joint by combining the distances among the four characteristic points; synchronously acquiring the inclination data of the in-pipe inclinometer, and correcting the inclination data of the in-pipe inclinometer according to the actual inclination value of the pipe joint;
data verification: and measuring the relative elevations of the four characteristic points by using the leveling instrument again to calculate the actual inclination value of the pipe joint again and verify the inclination data of the in-pipe inclinometer after correction.
This technical scheme prevents that the tube coupling from putting for a long time and leading to the condition that the data null shift appears in the inclinometer through the setting of spirit level, and then ensures that the data measurement of intraductal inclinometer is accurate reliable.
In some embodiments, in the step of calibrating the attitude of the measurement tower, initial values of the inclination relationship among the tower top inclinometer, the pipe top inclinometer and the pipe inside inclinometer are established when the attitude of the measurement tower is initialized. According to the technical scheme, the initial attitude calibration of the measuring tower is realized through the establishment of the initial relationship among the tower top inclinometer, the pipe top inclinometer and the pipe inside inclinometer.
In some embodiments, in the step of correcting the positioning inclination error of the measurement tower, the measurement and control system monitors the change of the inclination relation among the tower top inclinometer, the pipe top inclinometer and the pipe inside inclinometer in real time. The technical scheme realizes real-time monitoring of attitude change of the measuring tower.
In some embodiments, in the step of correcting the positioning and inclination error of the measuring tower, if the monitoring data is out of limit, the measurement and control system automatically sends a prompt for whether to correct, and automatically calculates and displays the corrected value, and an operator comprehensively studies and judges whether to correct the inclination error of the measuring tower according to the monitoring data. The technical scheme realizes real-time automatic prompt and man-machine interactive real-time correction of the positioning inclination error of the measuring tower.
In some embodiments, the tower top inclinometer, the pipe top inclinometer and the pipe inside inclinometer are all arranged in an inclinometer protection box, the inclinometer protection box is fixedly arranged on a damping bracket, and the damping bracket is connected with the measuring tower or the pipe joint in a welding mode; the inclinometer protection box and the damping bracket are made of stainless steel materials. This technical scheme passes through the setting of inclinometer protection box and shock absorber support, has realized protection and installation to the inclinometer, avoids causing the influence because of thermal expansion cold sum and strong vibrations to the precision of inclinometer.
In some embodiments, when the immersed tube installation measuring tower positioning and inclination error correction method is used for sinking drilling of pipe joints, the step of measuring tower attitude calibration and the step of measuring tower positioning and inclination error correction are carried out in a deep dock area. The technical scheme reveals the inclination change and the development trend of the measuring tower in the pipe joint sinking process, and verifies the feasibility and the effect of correcting the positioning inclination error of the measuring tower during the pipe joint sinking drilling in the deep dock area.
In some embodiments, when the immersed tube installation measuring tower positioning inclination error correction method is used for the sinking operation of a tube joint, the step of measuring tower posture calibration and the step of measuring tower positioning inclination error correction are carried out on a tunnel site. According to the technical scheme, the positioning inclination error correction of the measuring tower during the field sinking operation of the pipe joint at the tunnel site is realized, and the butt joint precision of the pipe joint during the field sinking operation at the tunnel site is ensured.
Based on the technical scheme, the method for correcting the positioning inclination error of the immersed tube installation measuring tower realizes real-time monitoring of the attitude change of the measuring tower in the process of sinking the tube joints, realizes real-time automatic prompt and man-machine interactive real-time correction of the positioning inclination error of the measuring tower, improves the positioning precision and reliability of the measuring tower, reduces the risk of butt joint measurement and control of the immersed tube, ensures the accuracy of the immersed tube installation, creates favorable conditions for realizing the non-fine adjustment of the immersed tube, and reduces the engineering cost.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the invention and together with the description serve to explain the invention without limiting the invention. In the drawings:
FIG. 1 is a technical route diagram of the method for correcting the positioning inclination error of a immersed tube installation measuring tower according to the present invention;
FIG. 2 is a schematic view of an inclinometer installation site of the present invention;
FIG. 3 is a diagram of the layout positions of the attitude calibration points of the inclinometer of the present invention;
FIG. 4 is a schematic diagram of the construction of the inclinometer protection case and shock mount of the present invention.
In the figure:
1. pipe joints; 2. a measuring tower; 3. an in-tube inclinometer; 4. a tower top inclinometer; 5. a tube top inclinometer; 6. a level gauge; 7. an inclinometer protection box; 8. shock attenuation support.
Detailed Description
The technical solutions in the embodiments will be clearly and completely described below with reference to the drawings in the embodiments of the present invention. It is to be understood that the described embodiments are merely a few embodiments of the invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments of the present invention without making any creative effort, shall fall within the protection scope of the present invention.
In the description of the present invention, it is to be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate orientations or positional relationships based on those shown in fig. 2, and are only for convenience of description and simplicity of description, and do not indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be construed as limiting the present invention.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
As shown in fig. 1 and fig. 2, the method for correcting the positioning inclination error of the immersed tube installation measuring tower comprises the steps of initial calibration of the attitude of a tube joint 1, installation of an inclinometer device, calibration of the attitude of a measuring tower 2, correction of the positioning inclination error of the measuring tower 2 and the like. Wherein the content of the first and second substances,
the step of initial calibration of the posture of the pipe joint 1 is carried out in a dry dock area, an in-pipe inclinometer 3 is installed inside the pipe joint 1, and an initial inclination value of the pipe joint 1 is read; the purpose of this step is to calibrate the initial attitude of the pipe joint 1.
The method comprises the steps of installing inclinometer equipment, namely moving a pipe joint 1 to a deep dock area, installing measuring towers 2 at the head end and the tail end of the top surface of the pipe joint 1 respectively, installing a tower top inclinometer 4 at the tops of the two measuring towers 2 respectively, and installing a pipe top inclinometer 5 at the top surface of the pipe joint 1 corresponding to the bottoms of the two measuring towers 2 respectively; the purpose of this step is to mount and position the various items of equipment required for this embodiment on the pipe section 1.
The attitude calibration step of the measuring tower 2 is to perform secondary calibration on the attitude of the pipe joint 1 and initialize the attitude of the measuring tower 2; the purpose of this step is to determine the attitude and interrelationship of the measuring tower 2 and the pipe section 1.
And (3) correcting the positioning inclination error of the measuring tower 2: during the sinking period of the pipe joint 1, a measurement and control system of the measuring tower 2 monitors the attitude data of the measuring tower 2 in real time; if the monitoring data is out of limit, the measurement and control system automatically prompts whether to correct; and if the monitoring data is normal, continuing to sink the pipe joint 1, and continuing to monitor the attitude data of the measuring tower 2 by the measurement and control system.
According to the illustrative embodiment, the inclinometers are additionally arranged on the top of the measuring tower 2 and the top of the pipe at the head end and the tail end of the pipe joint 1 respectively, the inclinometers are combined with the pipe inclinometer 3 to determine the postures and the mutual relations of the measuring tower 2 and the pipe joint 1, the posture change of the measuring tower 2 is monitored in real time through the measurement and control system in the sinking process of the pipe joint 1, the real-time automatic prompt and the man-machine interactive real-time correction of the positioning inclination error of the measuring tower 2 are realized, the positioning precision and the reliability of the measuring tower 2 are improved, and the sinking pipe installation precision is guaranteed.
In some embodiments, in the step of calibrating the attitude of the measurement tower 2, when the attitude of the pipe joint 1 is calibrated for the second time, the inclination data of the in-pipe inclinometer 3 is firstly read, and then the current actual inclination change of the pipe joint 1 is calculated by combining the initial inclination value of the pipe joint 1. The schematic embodiment realizes secondary calibration of the attitude of the pipe joint 1 and reveals the attitude change of the pipe joint 1.
As shown in fig. 3, in some embodiments, in order to prevent the tilt data of the in-tube inclinometer 3 from being zero-shifted when reading the tilt data of the in-tube inclinometer 3, the method further includes the steps of equipment installation, data correction, data verification and the like. Wherein the content of the first and second substances,
installing equipment, namely erecting a level 6 at the center of the top surface of the pipe joint 1, and arranging characteristic points marked as P1, P2, P3 and P4 at four corners of the top surface of the pipe joint 1 respectively, as shown in FIG. 3; it is noted that the level 6 can be seen with the four characteristic points P1, P2, P3 and P4.
Correcting data, namely measuring relative elevations of four characteristic points P1, P2, P3 and P4 through a level 6, and calculating an actual inclination value of the pipe joint 1 by combining the distances among the four characteristic points; and synchronously acquiring the inclination data of the in-pipe inclinometer 3, and correcting the inclination data of the in-pipe inclinometer 3 according to the actual inclination value of the pipe joint 1.
And (5) verifying the data, namely measuring the relative elevations of the four characteristic points by using the level gauge 6 again to calculate the actual inclination value of the pipe joint 1 again and verifying the corrected inclination data of the in-pipe inclinometer 3.
It should be noted that during leveling, an intercom is used to communicate with a driver in the cab during measurement time, and data of the in-tube inclinometer 3 needs to be synchronously acquired so as to ensure that the level 6 can accurately perform data correction and data verification on the in-tube inclinometer 3.
Above-mentioned exemplary embodiment, through the setting of spirit level 6, prevent that pipe section 1 from putting for a long time and leading to the condition that the data null shift appears in the inclinometer, and then ensure that the data measurement of intraductal inclinometer 3 is accurate reliable.
In some embodiments, in the step of calibrating the attitude of the measurement tower 2, when the attitude of the measurement tower 2 is initialized, initial values of the inclination relationship among the tower top inclinometer 4, the pipe top inclinometer 5, and the pipe inside inclinometer 3 are established. In the exemplary embodiment, the initial attitude calibration of the measurement tower 2 is realized by establishing the initial relationship among the tower top inclinometer 4, the pipe top inclinometer 5 and the pipe inside inclinometer 3.
In some embodiments, in the step of correcting the positioning inclination error of the measurement tower 2, the measurement and control system monitors the change of the inclination relation among the tower top inclinometer 4, the pipe top inclinometer 5 and the pipe inside inclinometer 3 in real time. According to the illustrative embodiment, the attitude change of the measuring tower 2 is monitored in real time.
In some embodiments, in the step of correcting the positioning inclination error of the measuring tower 2, if the monitoring data is out of limit, the measurement and control system automatically issues a prompt for correction, and automatically calculates and displays the correction value, and an operator comprehensively studies and judges whether to correct the inclination error of the measuring tower 2 according to the monitoring data. The illustrative embodiment realizes real-time automatic prompt and man-machine interactive real-time correction of the positioning inclination error of the measuring tower 2.
In some embodiments, as shown in fig. 4, the top inclinometer 5 and the inside inclinometer 3 are all installed in an inclinometer protection box 7, the inclinometer protection box 7 is fixedly arranged on a shock absorption bracket 8, and the shock absorption bracket 8 is connected with the measuring tower 2 or the pipe joint 1 by welding. The inclinometer protection box 7 and the damping bracket 8 are both made of stainless steel materials. This schematic embodiment, through the setting of inclinometer protection box 7 and shock absorber support 8, realized protection and installation to the inclinometer, avoid causing the influence because of thermal expansion and cold shrinkage and strong vibrations to the precision of inclinometer.
In some embodiments, when the immersed tube installation measuring tower positioning and inclination error correction method is used for the sinking drilling of the pipe joint 1, the step of measuring tower 2 attitude calibration and the step of measuring tower 2 positioning and inclination error correction are carried out in a deep dock area. The illustrative embodiment reveals the inclination change and the development trend of the measuring tower 2 in the pipe joint 1 sinking process, verifies the feasibility and the effect of correcting the positioning inclination error of the measuring tower 2 during the pipe joint 1 sinking drilling in the deep dock area, and provides test verification and guidance for the formal sinking operation of the pipe joint 1 on the tunnel site.
In some embodiments, when the immersed tube installation measuring tower positioning inclination error correction method is used for the sinking operation of the pipe joint 1, the step of calibrating the posture of the measuring tower 2 and the step of correcting the positioning inclination error of the measuring tower 2 are carried out on site at a tunnel site. According to the illustrative embodiment, the positioning inclination error correction of the measuring tower 2 during the field sinking operation of the pipe joint 1 at the tunnel site is realized, the butt joint precision of the pipe joint 1 during the field sinking operation at the tunnel site is ensured, the butt joint measurement and control risk of the immersed pipe is reduced, and the installation precision of the immersed pipe is ensured.
The following describes the steps of the method for correcting the positioning inclination error of the immersed tube installation measuring tower according to the present invention with reference to fig. 1 to 4:
a. in a dry dock area, an in-pipe inclinometer 3 is installed inside the pipe joint 1, an initial inclination value of the pipe joint 1 is read, and initial calibration of the posture of the pipe joint 1 is completed; it should be noted that the in-tube inclinometer 3 is placed in an inclinometer protection box 7, the inclinometer protection box 7 is fixedly arranged on a damping bracket 8, and the damping bracket 8 is welded on the pipe joint 1;
b. moving the pipe joint 1 to a deep dock area, respectively installing a measuring tower 2 at the head end and the tail end of the top surface of the pipe joint 1, respectively installing a tower top inclinometer 4 at the tower tops of the two measuring towers 2, and respectively installing a pipe top inclinometer 5 at the top surface of the pipe joint 1 corresponding to the tower bottoms of the two measuring towers 2; it should be noted that, the tower top inclinometer 4 and the pipe top inclinometer 5 are both placed in respective inclinometer protection boxes 7, the inclinometer protection boxes 7 are fixedly arranged on a shock absorption support 8, and the shock absorption support 8 is welded on the measuring tower 2 or the pipe joint 1;
c. erecting a level 6 at the center of the top surface of the pipe joint 1, and respectively arranging a characteristic point at each of four corners of the top surface of the pipe joint 1, wherein the characteristic points are marked as P1, P2, P3 and P4, so that the level 6 can be seen through the four characteristic points of P1, P2, P3 and P4;
d. measuring the relative elevations of four characteristic points P1, P2, P3 and P4 by the leveling instrument 6, and calculating the actual inclination value of the pipe joint 1 by combining the distances among the four characteristic points; synchronously acquiring the inclination data of the in-pipe inclinometer 3, and correcting the inclination data of the in-pipe inclinometer 3 according to the actual inclination value of the pipe joint 1; measuring the relative elevations of the four characteristic points by using the leveling instrument 6 again to calculate the actual inclination value of the pipe joint 1 again and verify the inclination data corrected by the in-pipe inclinometer 3; after the corrected inclination data of the in-pipe inclinometer 3 are determined, the current actual inclination change of the pipe joint 1 is calculated by combining the initial inclination value of the pipe joint 1, and the secondary calibration of the posture of the pipe joint 1 is completed; meanwhile, establishing an initial relationship among the tower top inclinometer 4, the pipe top inclinometer 5 and the pipe inside inclinometer 3, and realizing the calibration of the initial attitude of the measuring tower 2;
e. the pipe joint 1 begins to sink, and during the period, the measurement and control system of the measurement tower 2 monitors the attitude data of the measurement tower 2 in real time, namely the change of the inclination relation among the tower top inclinometer 4, the pipe top inclinometer 5 and the pipe inside inclinometer 3; if the monitoring data is out of limit, the measurement and control system automatically sends out a prompt for correcting or not, and automatically calculates and displays a correction value, and an operator comprehensively studies and judges whether to correct the inclination error of the measuring tower 2 or not according to the monitoring data; and if the monitoring data is normal, continuing to sink the pipe joint 1, and continuing to monitor the attitude data of the measuring tower 2 by the measurement and control system.
It will be appreciated that after steps a-c are completed, the pipe section 1 is first lowered and exercised in the deep dock area according to steps d-e, then transferred to the site of the tunnel, where steps d-e are repeated until the lowering and docking operation of the pipe section 1 is completed.
Through the description of the embodiments of the method for correcting the positioning inclination error of the immersed tube installation measuring tower, the invention can be seen to have at least one or more of the following advantages:
1. the arrangement of the inclinometer protection box 7 and the damping support 8 realizes the protection and installation of the inclinometer, and avoids the influence on the accuracy of the inclinometer caused by thermal expansion and cooling and strong vibration;
2. according to the method for correcting the positioning inclination error of the immersed tube installation measuring tower, the attitude change of the measuring tower 2 is monitored in real time in the process of sinking the tube joint 1, the real-time automatic prompt and man-machine interactive real-time correction of the positioning inclination error of the measuring tower 2 are realized, the positioning accuracy and reliability of the measuring tower 2 are improved, the risk of immersed tube butt joint measurement and control is reduced, and the immersed tube installation accuracy is guaranteed;
3. the method for correcting the positioning inclination error of the immersed tube installation measuring tower creates favorable conditions for realizing the immersed tube without fine adjustment and reduces the engineering cost.
Finally, it should be noted that: the embodiments in the present description are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other.
The above examples are only intended to illustrate the technical solution of the present invention and not to limit it; although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art will understand that: modifications to the specific embodiments of the invention or equivalent substitutions for parts of the technical features may be made; without departing from the spirit of the present invention, it is intended to cover all aspects of the invention as defined by the appended claims.
Claims (9)
1. The method for correcting the positioning inclination error of the immersed tube installation measuring tower is characterized by comprising the following steps of:
initial calibration of the attitude of the pipe joint: in a dry dock area, installing an in-pipe inclinometer inside a pipe joint, and reading an initial inclination value of the pipe joint;
installation of an inclinometer device: moving the pipe joints to a deep dock area, respectively installing a measuring tower at the head end and the tail end of the top surfaces of the pipe joints, respectively installing a tower top inclinometer at the tops of the two measuring towers, and respectively installing a pipe top inclinometer at the top surfaces of the pipe joints corresponding to the bottoms of the two measuring towers;
calibrating the attitude of the measuring tower: calibrating the attitude of the pipe joint for the second time, and initializing the attitude of the measuring tower;
correcting positioning inclination errors of the measuring tower: during the sinking period of the pipe joints, a measurement and control system of the measuring tower monitors the attitude data of the measuring tower in real time; if the monitoring data is out of limit, the measurement and control system automatically prompts whether to correct; and if the monitoring data is normal, continuing to sink the pipe joints, and continuing to monitor the attitude data of the measuring tower by the measurement and control system.
2. The method for correcting the positioning inclination error of the immersed tube installation measuring tower according to claim 1, wherein in the step of calibrating the attitude of the measuring tower, when the attitude of the pipe joint is calibrated for the second time, the inclination data of the in-pipe inclinometer is firstly read, and then the current actual inclination change of the pipe joint is calculated by combining the initial inclination value of the pipe joint.
3. The method for correcting the positioning inclination error of the immersed tube installation measuring tower according to claim 2, wherein when the inclination data of the in-tube inclinometer is read, in order to prevent the data of the in-tube inclinometer from being zero-shifted, the method further comprises the following steps:
equipment installation: erecting a level gauge at the center of the top surface of the pipe joint, and respectively arranging a characteristic point at each of four corners of the top surface of the pipe joint;
and (3) data correction: measuring the relative elevations of the four characteristic points through the leveling instrument, and calculating the actual inclination value of the pipe joint by combining the distances among the four characteristic points; synchronously acquiring the inclination data of the in-pipe inclinometer, and correcting the inclination data of the in-pipe inclinometer according to the actual inclination value of the pipe joint;
data verification: and measuring the relative elevations of the four characteristic points by using the leveling instrument again to calculate the actual inclination value of the pipe joint again and verify the corrected inclination data of the in-pipe inclinometer.
4. The method according to claim 2, wherein in the calibration of the attitude of the measurement tower, initial values of the inclination relationship among the tower top inclinometer, the pipe top inclinometer and the pipe inside inclinometer are established when the attitude of the measurement tower is initialized.
5. The immersed tube installation measuring tower positioning inclination error correction method according to claim 4, wherein in the measuring tower positioning inclination error correction step, the measurement and control system monitors changes in inclination relations among the tower top inclinometer, the pipe top inclinometer and the pipe inside inclinometer in real time.
6. The method for correcting the positioning inclination error of the immersed tube installation measuring tower according to claim 5, wherein in the step of correcting the positioning inclination error of the measuring tower, if monitoring data is out of limit, the measurement and control system automatically sends a prompt for correction, and automatically calculates and displays a correction value, and an operator comprehensively studies and judges whether to correct the inclination error of the measuring tower according to the monitoring data.
7. The method for correcting the positioning inclination error of the immersed tube installation measuring tower according to claim 1, wherein the tower top inclinometer, the tube top inclinometer and the tube inside inclinometer are all installed in an inclinometer protection box, the inclinometer protection box is fixedly arranged on a shock absorption bracket, and the shock absorption bracket is connected with the measuring tower or the tube joint in a welding manner; the inclinometer protection box and the damping support are made of stainless steel materials.
8. The method for correcting the positioning and inclination error of the immersed tube installation measuring tower according to claim 1, wherein the method for correcting the positioning and inclination error of the immersed tube installation measuring tower is used for the sinking drilling of the pipe section, and the step of calibrating the attitude of the measuring tower and the step of correcting the positioning and inclination error of the measuring tower are carried out in the deep dock area.
9. The method for correcting the positioning and inclination error of the immersed tube installation measuring tower according to claim 1, wherein when the method for correcting the positioning and inclination error of the immersed tube installation measuring tower is used for sinking operation of the pipe joint, the step of calibrating the attitude of the measuring tower and the step of correcting the positioning and inclination error of the measuring tower are carried out on site at a tunnel site.
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