A steel tower precision positioning method

Abstract

The present application relates to bridge construction surveying technical field, specifically relates to a kind of steel tower precision positioning method, the method includes the following steps: the lower end ring mouth of the steel tower segment to be installed is matched with the upper end ring mouth of the steel tower segment installed in horizontal direction Matched butt joint;Feature point is observed from at least three survey stations, combined with the known three-dimensional coordinates of survey station and feature point, the edge length correction coefficient between feature point and corresponding survey station is obtained;From the matching survey station of the same survey station of feature point, the coordinate of the survey station is corrected according to the edge length correction coefficient, and the difference before the intersection coordinates of the survey station are obtained;According to the deviation value of the theoretical coordinates of all survey stations and difference before intersection coordinates, the verticality of the steel tower segment to be installed is adjusted, so that the steel tower segment to be installed is in place.It can solve the problem that the existing technology is not suitable for the installation positioning measurement of super-high steel tower in the construction surveying method of super-high concrete bridge tower pier, and the traditional steel tower installation measurement method has the problem of low measurement accuracy.

Description

Technical Field

[0001] The present invention relates to the technical field of bridge construction measurement, and in particular to a method for precisely positioning a steel tower. Background Art

[0002] Steel towers are a widely used structural form for cable-stayed bridge piers. They are typically installed segment by segment, hoisted and installed one at a time. After the installed tower segments are completed, the next segment to be installed is hoisted and installed to match the already installed tower segments. The segments are bolted or welded together, and the installation is carried out in several sections. Ultra-high steel towers are approximately 300 meters tall, such as the 350-meter-high Zhangjinggao Yangtze River Channel Bridge. Installation requires hoisting more segments and installing them at higher altitudes, resulting in greater cumulative errors. Therefore, ultra-high steel towers impose special high-precision technical requirements on positioning and measurement. Planar installation accuracy is required to be ±2mm, and the inclination is 1 / 8000. Furthermore, ultra-high steel towers are approximately 300 meters high, sometimes even reaching 350 meters. Millimeter-level installation measurements at altitudes over 300 meters are even more challenging.

[0003] In the related art, traditionally, steel tower installation measurements generally use the ground total station polar coordinate measurement method or the all-weather measurement method with real-time deformation correction. The ground total station polar coordinate measurement method is used to set up the total station on a known control point on the ground when the steel tower is in a zero-deformation state. The actual coordinates of the characteristic points at the ring mouth of the steel tower segment to be installed are then measured using the polar coordinate measurement method. These coordinates are compared with the theoretical coordinates to obtain the deviation value of the steel tower segment to be installed. The steel tower is then adjusted into position based on this deviation value. The all-weather measurement method with real-time deformation correction is used to perform one-way polar coordinate measurement on the two characteristic point prisms set on the steel tower segment to be installed during the installation measurement of the steel tower segment to be installed. The weather and other factors affecting the steel tower deformation are corrected in real time to put the steel tower segment into position. This is essentially a real-time differential polar coordinate method.

[0004] However, this polar coordinate measurement method and real-time differential polar coordinates are a branch line measurement method that does not form redundant closed observation conditions, does not meet the requirements of the measurement adjustment principle, and cannot obtain high-precision results through adjustment. Therefore, the measurement accuracy is relatively low and is not suitable for the special high-precision positioning measurement requirements of ultra-high steel towers.

[0005] The construction survey methods for super-high concrete bridge pylons and piers generally utilize the zenithal relay point measurement method and the internal control measurement method. The zenithal relay point measurement method requires the installation of a measurement platform on the concrete bridge pylon body, beam, and tower top. The internal control measurement method requires the installation of a measurement platform in the construction area atop the concrete pylon pier. This means that the construction survey method for super-high concrete bridge pylons and piers requires the use of a measurement platform. However, the cross-section of a steel pylon is smaller than that of a concrete pylon pier, resulting in a narrow working surface at the top. Steel tower structures generally do not allow for temporary installations such as welded measurement platforms, making it difficult to set up a total station on the top and body of the pylon for installation and measurement. Therefore, the construction survey method for super-high concrete bridge pylons and piers is not suitable for the installation and positioning of super-high steel towers.

[0006] In summary, the construction measurement method for super-high concrete bridge tower piers is not suitable for the installation and positioning measurement of super-high steel towers. The traditional steel tower installation measurement method has the defect of low measurement accuracy and cannot meet the special high-precision requirements of super-high steel towers for installation and positioning measurement, which urgently needs to be improved. Summary of the Invention

[0007] In response to the defects in the prior art, the purpose of the present invention is to provide a method for precise positioning of steel towers, which can solve the problem that the construction measurement method of ultra-high concrete bridge tower piers in the prior art is not suitable for the installation and positioning measurement of ultra-high steel towers, and the traditional steel tower installation measurement method has low measurement accuracy.

[0008] In order to achieve the above purpose, the technical solution adopted by the present invention is:

[0009] The present invention provides a method for precise positioning of a steel tower, which is characterized by comprising the following steps:

[0010] Match and dock the lower end ring of the steel tower segment to be installed with the upper end ring of the installed steel tower segment in the horizontal direction;

[0011] Determining the number and positions of characteristic points to be set on the installed steel tower segment based on at least three position measurement points set on the steel tower segment to be installed;

[0012] Each of the feature points is observed from at least three measuring stations, and a correction coefficient for the side length between each feature point and the corresponding measuring station is obtained by combining the known three-dimensional coordinates of the measuring stations and the feature points;

[0013] Observe each of the positioning points from a survey station having the same matching feature point, and correct the coordinates of the positioning point according to the side length correction coefficient to obtain the differential forward intersection coordinates of the positioning point;

[0014] According to the deviation values ​​between the theoretical coordinates of all the positioning points and the differential forward intersection coordinates, the verticality of the steel tower segment to be installed is adjusted so that the steel tower segment to be installed is in place.

[0015] In some optional solutions, determining the number and positions of characteristic points on the installed steel tower segment based on at least three position measurement points provided on the steel tower segment to be installed includes:

[0016] Set up at least three position measurement points on the steel tower segment to be installed;

[0017] According to the positions of the positioning points, and based on ensuring that each positioning point has a characteristic point visible to the same at least three measuring stations, the number and positions of the characteristic points set on the installed steel tower segment are determined.

[0018] In some optional solutions, each of the feature points is observed from at least three measuring stations, and the known three-dimensional coordinates of the measuring stations and the feature points are combined to obtain a side length correction coefficient between each feature point and the corresponding measuring station, including:

[0019] Observe each characteristic point on the installed steel tower segment from at least three measuring station positions to obtain a first measured side length between each measuring station and the corresponding characteristic point;

[0020] According to the known three-dimensional coordinates of the measuring station and the feature point, the theoretical side length between each measuring station and the corresponding feature point is obtained;

[0021] According to the first measured side length and the corresponding theoretical side length, the side length correction coefficient corresponding to each measuring station and the corresponding feature point is obtained.

[0022] In some optional schemes, after the installed steel tower segment is completed, the installed steel tower segment is measured to obtain the completed three-dimensional coordinates of the feature points on the installed steel tower segment, and the completed three-dimensional coordinates of the feature points are used as the known three-dimensional coordinates of the feature points.

[0023] In some optional solutions, the characteristic point is set at the upper end ring of the installed steel tower segment and is located at the junction of two adjacent side surfaces of the installed steel tower segment.

[0024] In some optional solutions, observing each of the positioning points from a survey station having the same matching feature point, and correcting the coordinates of the positioning point according to a side length correction coefficient to obtain the differential forward intersection coordinates of the positioning point includes:

[0025] Observe each of the measurement points from a measurement station having the same matching feature point as the measurement point to obtain a second measured side length and a measured vertical angle from each measurement station to the corresponding measurement point;

[0026] Correcting the corresponding second measured side length according to the side length correction coefficient to obtain the corrected side length from each measuring station to each measuring point;

[0027] According to the corrected side length and the corresponding measured vertical angle, the differential horizontal side length corresponding to the corrected side length is obtained;

[0028] The differential forward intersection coordinates of the positioning point are calculated based on the differential horizontal side lengths from all the measuring stations to the corresponding positioning point.

[0029] In some optional solutions, the positioning point is set at the upper end ring of the steel tower segment to be installed, and is located at the junction of two adjacent side surfaces of the steel tower segment to be installed.

[0030] In some optional solutions, the vertical adjustment of the steel tower segment to be installed based on the theoretical coordinates of the position measurement point and the differential forward intersection coordinates to put the steel tower segment to be installed in place includes:

[0031] Comparing the theoretical coordinates of the positioning point with the differential forward intersection coordinates to obtain a deviation value between the theoretical coordinates of the positioning point and the differential forward intersection coordinates;

[0032] According to the deviation value between the theoretical coordinates of the positioning point and the differential forward intersection coordinates, and combined with the deviation of the installed steel tower segment, the verticality of the steel tower segment to be installed is adjusted so that the steel tower segment to be installed is installed in place.

[0033] In some optional solutions, the step of horizontally matching the lower end ring opening of the to-be-installed steel tower segment with the upper end ring opening of the installed steel tower segment includes:

[0034] Obtaining the contour lines of the lower end ring opening of the steel tower segment to be installed and the upper end ring opening of the installed steel tower segment;

[0035] Determine the matching deviation between the lower end ring opening of the steel tower segment to be installed and the upper end ring opening of the installed steel tower segment according to the contour lines of the lower end ring opening of the steel tower segment to be installed and the upper end ring opening of the installed steel tower segment;

[0036] Based on the matching deviation between the ring opening at the lower end of the steel tower segment to be installed and the ring opening at the upper end of the installed steel tower segment, the deviation around the ring opening is evenly distributed so that the ring opening at the lower end of the steel tower segment to be installed and the ring opening at the upper end of the installed steel tower segment can be precisely matched and docked in the horizontal direction.

[0037] In some optional schemes, when the lower end ring mouth of the steel tower segment to be installed is matched and docked with the upper end ring mouth of the installed steel tower segment in the horizontal direction, two Beidou system receivers are set at circumferential intervals of the upper end ring mouth of the steel tower segment to be installed to measure the posture parameters such as the position, inclination and rotation angle of the steel tower segment to be installed; and multiple laser projectors are set at circumferential intervals of the lower end ring mouth of the steel tower segment to be installed to mark the matching deviation between the lower end ring mouth of the steel tower segment to be installed and the upper end ring mouth of the installed steel tower segment.

[0038] Compared with the existing technology, the advantages of the present invention are as follows: first, the lower end ring mouth of the steel tower segment to be installed is matched and docked with the upper end ring mouth of the installed steel tower segment in the horizontal direction, each feature point is observed from at least three measuring stations, and the known three-dimensional coordinates of the measuring stations and feature points are combined to obtain the side length correction coefficient between each feature point and the corresponding measuring station; then, the position measuring point is observed from the measuring station with the same matching feature point, and the coordinates of the position measuring point are corrected according to the side length correction coefficient to obtain the differential forward intersection coordinates of the position measuring point; according to the deviation value between the theoretical coordinates of all the position measuring points and the differential forward intersection coordinates, the verticality of the steel tower segment to be installed is adjusted to put the steel tower segment to be installed in place. This solution uses differential side length measurement to perform forward intersection coordinate adjustment calculation, and can obtain the precise differential forward intersection coordinates of the measuring points of the steel tower segment to be installed. In this way, compared with the traditional steel tower measurement method, the differential forward intersection coordinate measurement method can obtain more accurate verticality measurement data of the steel tower segment to be installed, so that the special accuracy of super steel tower installation measurement can be achieved, which is conducive to improving the installation measurement accuracy of the steel tower segment to be installed, that is, high measurement accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0040] Figure 1 Flowchart of the steel tower precision positioning method according to an embodiment of the present invention;

[0041] Figure 2 Schematic diagram of the principle of the method for rapid and precise positioning of an ultra-high steel tower in an embodiment of the present invention;

[0042] Figure 3 Schematic diagram of the arrangement of the auxiliary device for measuring the hoisting status of the steel tower segment to be installed in an embodiment of the present invention.

[0043] In the figure: 1. Steel tower segment to be installed; 2. Installed steel tower segment; 3. Feature point; 4. Position measurement point; 5. Beidou system receiver; 6. Laser projector; 7. Measurement station. DETAILED DESCRIPTION

[0044] To make the purpose, technical solutions, and advantages of the embodiments of this application more clear, the technical solutions in the embodiments of this application will be clearly and completely described below in conjunction with the drawings in the embodiments of this application. Obviously, the described embodiments are part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0045] The embodiments of the present invention are further described in detail below with reference to the accompanying drawings.

[0046] like Figure 1 As shown, the present invention provides a method for precise positioning of a steel tower, comprising the following steps:

[0047] S1: align and dock the lower end ring opening of the steel tower segment 1 to be installed with the upper end ring opening of the installed steel tower segment 2 in the horizontal direction.

[0048] In some optional embodiments, step S1 includes:

[0049] S11: Obtain the contour lines of the lower end ring opening of the steel tower segment 1 to be installed and the upper end ring opening of the installed steel tower segment 2.

[0050] In this example, after the steel beam segment processing is completed, two sets of industrial measurement cameras are used at its processing site to perform image measurement and data processing on the lower end ring mouth of the steel tower segment 1 to be installed and the upper end ring mouth of the installed steel tower segment 2, respectively, to obtain the contour lines of the lower end ring mouth of the steel tower segment 1 to be installed and the upper end ring mouth of the installed steel tower segment 2.

[0051] S12: Determine the matching deviation between the lower end ring opening of the steel tower segment 1 to be installed and the upper end ring opening of the installed steel tower segment 2 according to the contour lines of the lower end ring opening of the steel tower segment 1 to be installed and the upper end ring opening of the installed steel tower segment 2.

[0052] In this example, the matching deviation between the lower end ring opening of the steel tower segment 1 to be installed and the upper end ring opening of the installed steel tower segment 2 is measured based on the contour line deviation between the lower end ring opening of the steel tower segment 1 to be installed and the upper end ring opening of the installed steel tower segment 2.

[0053] S13: Based on the matching deviation between the ring opening at the lower end of the steel tower segment 1 to be installed and the ring opening at the upper end of the installed steel tower segment 2, the deviation around the ring opening is evenly distributed so that the ring opening at the lower end of the steel tower segment 1 to be installed and the ring opening at the upper end of the installed steel tower segment 2 are matched and docked in the horizontal direction.

[0054] In some optional embodiments, when the lower end ring mouth of the steel tower segment 1 to be installed is matched and docked with the upper end ring mouth of the installed steel tower segment 2 in the horizontal direction, two Beidou system receivers 5 are set at intervals in the circumferential direction of the upper end ring mouth of the steel tower segment 1 to be installed, for measuring the posture parameters such as the position, inclination and rotation angle of the steel tower segment 1 to be installed; and multiple laser projectors 6 are set at intervals in the circumferential direction of the lower end ring mouth of the steel tower segment 1 to be installed, for marking the matching deviation between the lower end ring mouth of the steel tower segment 1 to be installed and the upper end ring mouth of the installed steel tower segment 2.

[0055] In this example, the cross-section of the steel tower segments is rectangular. Two Beidou system receivers 5 are arranged on opposite sides of the upper end ring of the steel tower segment 1 to be installed, that is, on opposite sides of the rectangle. Four laser projectors 6 are arranged at intervals in the circumferential direction of the lower end ring of the steel tower segment 1 to be installed, and are respectively arranged at the center of the four sides of the rectangle, which can be used to guide the installers to match and dock the rings in the horizontal direction.

[0056] like Figure 2 and Figure 3 As shown, S2: based on at least three position measurement points 4 set on the steel tower segment 1 to be installed, determine the number and positions of the characteristic points 3 set on the installed steel tower segment 2.

[0057] In some optional embodiments, step S2 includes:

[0058] S21: Set at least three position measurement points 4 on the steel tower segment 1 to be installed.

[0059] Multiple positioning points 4 are installed on the steel tower segment 1 to provide guidance for vertical adjustment. Generally, at least three positioning points 4 are required. In this example, the steel tower segments are all rectangular in cross-section, and positioning points 4 are set at the four corners of the upper ring of the steel tower segment 1 to be installed. Each positioning point 4 is equipped with a prism to facilitate subsequent measurement.

[0060] S22: According to the positions of the measuring points 4, and based on the fact that each measuring point 4 has a characteristic point 3 that is visible to the same at least three measuring stations 7, the number and positions of the characteristic points 3 set on the installed steel tower segment 2 are determined.

[0061] In this embodiment, the cross-section of the steel tower segments is rectangular, and characteristic points 3 are set at the four corners of the upper end ring of the installed steel tower segment 2. The characteristic point 3 and the position measurement point 4 on the same corner can be detected through line of sight using the same at least three measurement stations 7.

[0062] In other embodiments, the number and positions of the characteristic points 3 set on the installed steel tower segment 2 can be determined as long as each measuring point 4 has a characteristic point 3 that can be viewed by at least three identical measuring stations 7 .

[0063] S3: Each feature point 3 is observed from at least three measuring stations 7, and the known three-dimensional coordinates of the measuring stations 7 and the feature points 3 are combined to obtain the side length correction coefficient between each feature point 3 and the corresponding measuring station 7.

[0064] In some optional embodiments, step S3 includes:

[0065] S31: Observe each characteristic point 3 on the installed steel tower segment 2 from at least three measuring station 7 positions to obtain a first measured side length between each measuring station 7 and the corresponding characteristic point 3.

[0066] In this example, three measuring stations 7 are used for each feature point 3 and its corresponding position measurement point 4. To obtain the first measured side length between each measuring station 7 and the corresponding feature point 3, a total station is used to observe the feature point 3 at the measuring station 7 to obtain the distance between the measuring station 7 and the feature point 3, i.e., the first measured side length. In this example, there are four feature points 3, each corresponding to three measuring stations 7, resulting in 12 first measured side lengths.

[0067] In some optional embodiments, the characteristic point 3 is set at the upper end ring of the installed steel tower segment 2 and is located at the intersection of two adjacent side surfaces of the installed steel tower segment 2. The cross section of the steel tower segment is rectangular, and the characteristic points 3 are set at the four corners of the upper end ring of the installed steel tower segment 2.

[0068] S32: Obtain the theoretical side length between each measuring station 7 and the corresponding feature point 3 according to the known three-dimensional coordinates of the measuring station 7 and the feature point 3.

[0069] In some optional embodiments, after the installed steel tower segment 2 is completed, the installed steel tower segment 2 is measured to obtain the completed three-dimensional coordinates of the feature points on the installed steel tower segment 2, and the completed three-dimensional coordinates of the feature point 3 are the known three-dimensional coordinates of the feature point 3.

[0070] In addition, when the steel tower segment 2 is installed and the completion measurement is carried out, the steel tower is in a zero deformation state.

[0071] In this example, characteristic points 3 are provided on the installed steel tower segment 2. Each characteristic point corresponds to three measuring stations 7. The three-dimensional coordinates of the measuring stations 7 are known, and the corresponding theoretical side lengths of 3×4=12 from the three measuring stations 7 to the four characteristic points 3 can be calculated.

[0072] S33: Obtaining the corresponding side length correction coefficient between each measuring station 7 and the corresponding feature point 3 according to the first measured side length and the corresponding theoretical side length.

[0073] In this example, twelve differences between the 3×4=12 corresponding measured side lengths from the three measuring stations 7 to the four characteristic points 3 and the 3×4=12 corresponding theoretical side lengths from the measuring stations 7 to the four characteristic points 3 are compared. Based on the twelve differences and the 3×4=12 corresponding side lengths from each measuring station 7 to the characteristic points 3, the 3×4=12 corresponding side length correction coefficients of the three measuring stations 7 and the four characteristic points 3 are calculated respectively.

[0074] S4: Observe each measuring point 4 from the measuring station 7 having the same matching feature point 3 as the measuring point 4 , correct the coordinates of the measuring point 4 according to the side length correction coefficient, and obtain the differential forward intersection coordinates of the measuring point 4 .

[0075] In some optional embodiments, step S4 includes:

[0076] S41 : Observe each measuring point 4 from the measuring station 7 having the same matching feature point 3 as the measuring point 4 , and obtain the second measured side length and measured vertical angle from each measuring station 7 to the corresponding measuring point 4 .

[0077] In some optional embodiments, the position measurement point 4 is set at the upper end ring of the steel tower segment 1 to be installed, and is located at the junction of two adjacent side surfaces of the steel tower segment 1 to be installed.

[0078] In this example, the steel tower segments all have rectangular cross-sections, and positioning points 4 are set at the four corners of the upper ring of the steel tower segment 1 to be installed. With the steel tower in a zero-deformation state, a total station set at each measuring station 7 is used to intersect and observe the three measuring stations 7 to the four positioning points 4 on the steel tower segment 1 to be installed, i.e., the 3×4=12 measured sides and 3×4=12 measured vertical angles of the prism.

[0079] S42: Correct the corresponding second measured side length according to the side length correction coefficient to obtain the corrected side length from each measuring station 7 to each measuring point 4.

[0080] In this example, according to the side length correction coefficient, the 3×4=12 actually measured side lengths from the three measuring stations 7 to the four measuring points 4 on the steel tower segment 1 to be installed are corrected respectively, and the 3×4=12 corresponding corrected side lengths from the three measuring stations 7 to the four measuring points 4 on the steel tower segment 1 to be installed are obtained respectively.

[0081] S43: Obtaining a differential horizontal side length corresponding to the corrected side length according to the corrected side length and the corresponding measured vertical angle.

[0082] In this example, based on the 3×4=12 corresponding corrected side lengths and 3×4=12 measured vertical angles from the three measuring stations 7 to the four positioning points 4 on the steel tower segment 1 to be installed, the horizontal lengths of the 3×4=12 corresponding corrected side lengths from the three measuring stations 7 to the positioning points 4 on the steel tower segment 1 to be installed are calculated respectively, and used as the 3×4=12 corresponding differential horizontal lengths from the three measuring stations 7 to the four positioning points 4 on the steel tower segment 1 to be installed.

[0083] S44: Obtain the differential forward intersection coordinates of the corresponding measuring point 4 according to the differential horizontal side lengths from all measuring station points 7 to the corresponding measuring point 4.

[0084] In this example, according to the principle of side length intersection measurement, differential horizontal side length intersection calculation is performed on each measuring point 4 based on every three differential horizontal side lengths from the three measuring stations 7 to each measuring point 4 on the steel tower segment 1 to be installed, and the differential forward intersection coordinates of the four measuring points 4 are obtained respectively.

[0085] S5: According to the deviation values ​​between the theoretical coordinates of all the position measurement points 4 and the differential forward intersection coordinates, the verticality of the steel tower segment 1 to be installed is adjusted so that the steel tower segment 1 to be installed is in place.

[0086] In some optional embodiments, step S5 includes:

[0087] S51: Compare the theoretical coordinates of the positioning point 4 with the differential forward intersection coordinates to obtain a deviation value between the theoretical coordinates of the positioning point 4 and the differential forward intersection coordinates.

[0088] In this example, the theoretical coordinates of the position measurement point 4 are the designed theoretical coordinates of the position measurement point 4 during design.

[0089] S52: According to the deviation value between the theoretical coordinates of the position measurement point 4 and the differential forward intersection coordinates, and in combination with the deviation of the installed steel tower segment 2, the verticality of the steel tower segment 1 to be installed is adjusted so that the steel tower segment 1 to be installed is installed in place.

[0090] In summary, the embodiment of the present invention provides a method for precise positioning of steel tower segments. By measuring the contour lines of the lower end ring mouth of the steel tower segment to be installed and the upper end ring mouth of the installed steel tower segment through image measurement, the matching deviation of industrial precision level can be obtained, and the matching and docking method of averaging the deviation around the ring mouth is adopted. The deviation around the ring mouth is evenly distributed to prevent uneven accumulation of deviations, cleverly reduce the mutual misalignment error between the ring mouth contour lines, and ensure the horizontal matching accuracy of the lower end ring mouth of the steel tower segment to be installed and the upper end ring mouth of the installed steel tower segment; using differential side length measurement, forward intersection coordinate adjustment calculation is performed to obtain precise differential forward intersection coordinates of the position measurement points of the steel tower segment to be installed. Compared with the traditional steel tower measurement method, this differential forward intersection coordinate measurement method can obtain more precise verticality measurement data of the steel tower segment to be installed, so that the special accuracy of super steel tower installation measurement can be achieved, which is beneficial to improving the installation measurement accuracy of the steel tower segment to be installed, that is, high measurement accuracy.

[0091] In addition, through the auxiliary device for measuring the hoisting status of the steel tower segment to be installed, the hoisting posture of the steel tower segment can be observed in real time and the deviation of the ring mouth at the lower end of the segment to be installed can be visually marked to guide the installation personnel to match, so that the ring mouth at the lower end of the steel tower segment to be installed and the ring mouth at the upper end of the installed steel tower segment can be quickly matched, which is conducive to improving the installation measurement efficiency of the steel tower segment to be installed, that is, the measurement efficiency is high.

[0092] In the description of this application, it should be noted that the terms "upper" and "lower" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on this application. Unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be internal communication between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to the specific circumstances.

[0093] It should be noted that, in this application, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device comprising a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, an element defined by the sentence "comprising a ..." does not exclude the presence of other identical elements in the process, method, article or device comprising the element.

[0094] The foregoing is merely a list of specific embodiments of the present application, intended to enable those skilled in the art to understand or implement the present application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application is not limited to the embodiments shown herein, but is intended to conform to the broadest scope consistent with the principles and novel features of the present application.

Claims

1. A method for precise positioning of a steel tower, characterized in that: The following steps are involved: Matching and docking the lower end ring opening of the steel tower segment (1) to be installed with the upper end ring opening of the installed steel tower segment (2) in the horizontal direction; Based on at least three position measurement points (4) provided on the steel tower segment (1) to be installed, the number and positions of characteristic points (3) provided on the installed steel tower segment (2) are determined, including: At least three position measurement points (4) are set on the steel tower segment (1) to be installed; According to the positions of the positioning points (4), the number and positions of the characteristic points (3) set on the installed steel tower segment (2) are determined based on the fact that each positioning point (4) has a characteristic point (3) that is visible to the same at least three measuring stations (7); Each of the characteristic points (3) is observed from at least three measuring stations (7), and the characteristic points (3) are observed at the measuring stations (7) using a total station. Combining the known three-dimensional coordinates of the measuring stations (7) and the characteristic points (3), a side length correction coefficient between each characteristic point (3) and the corresponding measuring station (7) is obtained, including: Observe each characteristic point (3) on the installed steel tower segment (2) from at least three measuring stations (7) to obtain a first measured side length between each measuring station (7) and the corresponding characteristic point (3); According to the known three-dimensional coordinates of the measuring station (7) and the characteristic point (3), the theoretical side length between each measuring station (7) and the corresponding characteristic point (3) is obtained; According to the first measured side length and the corresponding theoretical side length, a side length correction coefficient corresponding to each measuring station (7) and the corresponding characteristic point (3) is obtained; Observing each of the positioning points (4) from a measuring station (7) having the same matching characteristic point (3) as the positioning point (4), correcting the coordinates of the positioning point (4) according to the side length correction coefficient, and obtaining the differential forward intersection coordinates of the positioning point (4), including: Using a total station to observe each of the position measurement points (4) from a measurement station (7) having the same matching characteristic point (3) as the position measurement point (4), and obtaining a second measured side length and a measured vertical angle from each measurement station (7) to the corresponding position measurement point (4); Correcting the corresponding second measured side length according to the side length correction coefficient to obtain the corrected side length from each measuring station (7) to each measuring point (4); According to the corrected side length and the corresponding measured vertical angle, the differential horizontal side length corresponding to the corrected side length is obtained; Calculate the differential forward intersection coordinates of the position measuring point (4) based on the differential horizontal side lengths from all the measuring station points (7) to the corresponding position measuring point (4); According to the deviation values ​​between the theoretical coordinates of all the position measurement points (4) and the differential forward intersection coordinates, the verticality of the steel tower segment (1) to be installed is adjusted so that the steel tower segment (1) to be installed is in place.

2. The steel tower precision positioning method according to claim 1, wherein: After the installed steel tower segment (2) is completed, the installed steel tower segment (2) is subjected to completion measurement to obtain the completion three-dimensional coordinates of the characteristic point (3) on the installed steel tower segment (2), and the completion three-dimensional coordinates of the characteristic point (3) are used as the known three-dimensional coordinates of the characteristic point (3).

3. The steel tower precision positioning method according to claim 1, wherein: The characteristic point (3) is arranged at the upper end ring opening of the installed steel tower segment (2), and is located at the junction of two adjacent side surfaces of the installed steel tower segment (2).

4. The steel tower precision positioning method according to claim 1, characterized in that: The position measurement point (4) is arranged at the upper end ring opening of the steel tower segment (1) to be installed, and is located at the junction of two adjacent side surfaces of the steel tower segment (1) to be installed.

5. The steel tower precision positioning method according to claim 1, characterized in that: The vertical adjustment of the steel tower segment (1) to be installed is performed based on the deviation values ​​between the theoretical coordinates of all the position measurement points (4) and the differential forward intersection coordinates, so that the steel tower segment (1) to be installed is in place, comprising: Comparing the theoretical coordinates of the positioning point (4) with the differential forward intersection coordinates to obtain a deviation value between the theoretical coordinates of the positioning point (4) and the differential forward intersection coordinates; According to the deviation value between the theoretical coordinates of the position measurement point (4) and the differential forward intersection coordinates, and in combination with the deviation of the installed steel tower segment (2), the verticality of the steel tower segment (1) to be installed is adjusted so that the steel tower segment (1) to be installed is installed in place.

6. The steel tower precision positioning method according to claim 1, characterized in that: The step of matching and docking the lower end ring opening of the to-be-installed steel tower segment (1) with the upper end ring opening of the installed steel tower segment (2) in the horizontal direction comprises: Obtaining the contour lines of the lower end ring opening of the steel tower segment to be installed (1) and the upper end ring opening of the installed steel tower segment (2); Determine the matching deviation between the lower end ring opening of the steel tower segment to be installed (1) and the upper end ring opening of the installed steel tower segment (2) based on the contour lines of the lower end ring opening of the steel tower segment to be installed (1) and the upper end ring opening of the installed steel tower segment (2); Based on the matching deviation between the ring opening at the lower end of the steel tower segment (1) to be installed and the ring opening at the upper end of the installed steel tower segment (2), the deviation around the ring opening is evenly distributed, so that the ring opening at the lower end of the steel tower segment (1) to be installed and the ring opening at the upper end of the installed steel tower segment (2) are precisely matched and docked in the horizontal direction.

7. The steel tower precision positioning method according to claim 6, characterized in that: When the lower end ring opening of the steel tower segment to be installed (1) is matched and docked with the upper end ring opening of the installed steel tower segment (2) in the horizontal direction, two Beidou system receivers (5) are arranged at intervals in the circumferential direction of the upper end ring opening of the steel tower segment to be installed (1) for measuring the position, inclination and rotation angle attitude parameters of the steel tower segment to be installed (1); and a plurality of laser projectors (6) are arranged at intervals in the circumferential direction of the lower end ring opening of the steel tower segment to be installed (1) for marking the matching deviation between the lower end ring opening of the steel tower segment to be installed (1) and the upper end ring opening of the installed steel tower segment (2).

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