Superspeed low vacuum tube beam tunnel positioning construction measurement method

Abstract

The invention provides an ultra-high-speed low vacuum tube beam tunnel positioning construction measurement method, and belongs to the technical field of ultra-high-speed low vacuum. According to the method, the control network with three levels is arranged, the laser tracker is used for measuring the monitoring points in the tubular beam tunnel to obtain the actual coordinates and fitting the first line shape, and after the theoretical value and the actual value are compared to obtain the correction value, the tubular beam tunnel is adjusted for multiple times, and the accuracy of the adjustment is improved. According to the method, the measurement advantages of a total station on long and large lines in engineering are combined, the short-distance high-precision measurement characteristic of a laser scanner is utilized, the optimal advantages of two measurement modes or measurement instruments are fully combined, and the absolute coordinates of any installation position of all equipment in the long and large lines are accurately positioned by adopting the thought of mutually complementing the disadvantages; and the effect of quickly installing and positioning the precision equipment in the ultrahigh-speed low-vacuum-tube-beam tunnel is achieved.

Description

Technical Field

[0001] The invention belongs to the field of ultra-high-speed low-vacuum technology, and in particular relates to an ultra-high-speed low-vacuum pipe-beam tunnel positioning construction measurement method. Background Art

[0002] The ultra-high-speed low-vacuum pipeline maglev transportation system uses contactless electromagnetic propulsion to allow vehicles to travel at high speeds in the pipeline. Different from traditional wheel-rail transportation, its notable feature is the use of superconducting magnetic levitation technology to break away from contact with the ground to eliminate friction resistance, while using the internal near-vacuum pipeline lines to greatly reduce air resistance, thereby achieving "near-ground flight" of more than 1,000 kilometers per hour. It is faster, more convenient, more comfortable, safer and economically controllable, and is the next generation of ultra-high-speed transportation.

[0003] Since the vehicle travels at a speed of 1000 km / h in the pipeline, the construction accuracy requirements for the pipe-beam tunnel are higher than those for the traditional pipe-beam tunnel. In addition, in the current pipe-beam tunnel construction measurement technology, total stations or laser trackers are mainly used for measurement, but the total station has a lower ranging accuracy than the laser tracker. The highest one is Leica's TDM(A)5005 industrial total station, whose nominal standard accuracy is 1mm+2x10'D. Within a range of 120m, with a high-precision angle prism, a measurement accuracy of 0.2mm can be achieved. Since its angle measurement accuracy is 0.5, within a range of 20m, the measurement accuracy of the entire system can reach 0.3mm. This obviously cannot meet the requirements of some ultra-high precision positioning, limiting the application of total stations.

[0004] Compared with the total station, the laser tracker is greatly affected by the environment, so the distance between the instrument and the target cannot be too long, generally less than 15m, and the positioning accuracy decreases after the limit is extended to more than 60m. However, this problem is not serious for precision engineering measurement or industrial measurement, but for long-line high-speed pipeline maglev transportation systems, if the measurement distance is too small each time, the efficiency will be low, and the time and cost expenditure will increase significantly. Because according to the requirements of accuracy and visibility, the control point distance is often less than this distance. The positioning accuracy can reach 0.01mm.

[0005] Since the ultra-high-speed low-vacuum pipeline maglev transportation system is a project with very high precision requirements, the precise measurement method is not only related to the smoothness and construction quality of the ballastless track, but also to the construction progress because the ultra-high-speed low-vacuum pipe-beam tunnel fine-tuning, track fine-tuning and measurement control are also required during construction.

[0006] Therefore, how to provide a positioning construction measurement method suitable for ultra-high-speed low-vacuum pipeline maglev transportation system to meet the actual needs of various parts of the ultra-high-speed low-vacuum pipeline maglev transportation system is of great importance to the application of the ultra-high-speed low-vacuum pipeline maglev transportation system. Summary of the invention

[0007] The embodiment of the present invention provides a positioning construction measurement method for an ultra-high-speed low-vacuum pipe-beam tunnel, aiming to accurately measure the ultra-high-speed low-vacuum pipe-beam tunnel.

[0008] To achieve the above object, the technical solution adopted by the present invention is: to provide an ultra-high-speed low-vacuum pipe-beam tunnel positioning construction measurement method, comprising:

[0009] S1. Carry out primary layout of the area where the maglev transportation system is located and secondary layout of the line control network;

[0010] S2. Conduct three-level encryption deployment in the pipe-beam tunnel of the maglev transportation system;

[0011] S3, using a laser tracker to measure each monitoring point in the tube-beam tunnel, obtaining the actual coordinates and the first line shape of the tube-beam tunnel, and combining the theoretical values ​​of each monitoring point in the tube-beam tunnel to obtain a first correction value;

[0012] S4. Based on the first correction value, adjusting the pipe-beam tunnel for the first time;

[0013] S5, using a laser tracker to perform secondary measurement on each monitoring point in the pipe-beam tunnel after adjustment to obtain a first corrected line shape; combining the theoretical values ​​of each monitoring point in the pipe-beam tunnel to obtain a second corrected value;

[0014] S6. Based on the second correction value, perform a second adjustment on the pipe-beam tunnel;

[0015] S7. Repeat steps S3-S6 until the adjustment is completed.

[0016] In a possible implementation, measuring and obtaining the first alignment of the pipe-beam tunnel includes the following steps:

[0017] The CPⅠ coordinate points obtained in step S1 form a first control network and the CPⅡ coordinate points obtained form a second control network;

[0018] The CPⅢ coordinate points obtained in step S2 are obtained to form a third control network;

[0019] The actual coordinates of the tube-beam tunnel are measured and obtained based on the first control network, the second control network and the third control network, so as to fit the first line shape of the tube-beam tunnel.

[0020] In a possible implementation, the actual coordinates of the pipe-beam tunnel after being measured based on the first control network, the second control network, and the third control network include:

[0021] Measuring the actual coordinates of the pipe-beam tunnel based on the first control network;

[0022] The second control network and the third control network are used synchronously to measure and correct the measurement points of the first control network, so as to obtain the actual coordinates of the pipe-beam tunnel and finally fit the first line shape.

[0023] In a possible implementation, the acquired three-dimensional coordinates of the CPⅡ coordinate point include:

[0024] Use GNSS static measurement to obtain the plane coordinates of the CPⅡ coordinate points;

[0025] A coaxial sighting mark frame of fixed height is installed at each CPⅡ coordinate point, and a coaxial elevation point with the CPⅡ coordinate point is set on the prism convex head of the sighting mark;

[0026] The coaxial elevation of each coaxial elevation point of CPⅡ is obtained by measuring the coaxial level route.

[0027] In a possible implementation manner, the step of acquiring the first corrected line shape includes:

[0028] After the first adjustment is completed, multiple pairs of CPⅢ coordinate points are symmetrically arranged in the tube-beam tunnel from the middle of the tube-beam tunnel to both ends of the tube-beam tunnel;

[0029] Placing a laser tracker in the pipe-beam tunnel, acquiring the three-dimensional coordinates of the laser tracker through the first control network, and acquiring the three-dimensional coordinates of the CPⅢ coordinate point through the laser tracker;

[0030] According to the three-dimensional coordinates of the CPⅢ coordinate point, the first line shape of the pipe-beam tunnel after adjustment is completed is obtained.

[0031] In a possible implementation, when the three-dimensional coordinates of the laser tracker are acquired through the first control network, the second control network and the third control network are synchronously used to measure and correct the coordinates of the CPI coordinate points of the first control network.

[0032] In a possible implementation, a laser tracker is placed in the pipe-beam tunnel, and the three-dimensional coordinates of the laser tracker are obtained through the first control network. The three-dimensional coordinates of the CPⅢ coordinate point are obtained by measuring with the laser tracker, including:

[0033] After the first adjustment is completed, two laser trackers are placed in the mid-span area of ​​the tube-beam tunnel, and the two laser trackers measure the three-dimensional coordinates of the CPⅢ coordinate points at both ends of the tube-beam tunnel in sequence;

[0034] A plurality of pairs of CPⅢ coordinate points are set at equal intervals from the mid-span to both ends of the tube-beam tunnel.

[0035] In a possible implementation, the spacing distance between the multiple pairs of CPⅢ coordinate points is 15m-30m.

[0036] In a possible implementation, the fine-tuning and installing of the pipe-beam tunnel based on the first alignment and the first modified alignment includes:

[0037] According to the first linear shape and the first corrected linear shape, a coordinate adjustment difference value of each CPⅢ coordinate point is obtained;

[0038] According to the coordinate adjustment difference, the pipe-beam tunnel is fine-tuned and installed.

[0039] In a possible implementation, the tube-beam tunnel is fine-tuned again for a second time, using the same method as the first adjustment.

[0040] In the present implementation / application embodiment, compared with the prior art, a method for positioning and constructing an ultra-high-speed low-vacuum tube-beam tunnel is provided with a three-level control network, and a laser tracker is used to measure the monitoring points in the tube-beam tunnel to obtain the actual coordinates and fit the first linear shape. After the correction value is obtained by comparing the theoretical value with the actual value, the tube-beam tunnel is adjusted multiple times. This method combines the advantages of the total station in the project for measuring long and large lines, and utilizes the short-distance and high-precision measurement characteristics of the laser scanner. It fully combines the best advantages of the two measurement methods or measuring instruments, adopts the idea of ​​learning from each other's strengths and weaknesses, and accurately locates the absolute coordinates of any installation position of all equipment in long and large lines, so as to achieve the effect of rapid installation and positioning of precision equipment in ultra-high-speed low-vacuum tube-beam tunnels. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] Figure 1 A schematic diagram of a first control network, a second control network and a third control network provided in an embodiment of the present invention;

[0042] Figure 2 It is a schematic diagram of the control points required for setting up a laser tracker at a local position of a pipe-beam tunnel according to the present invention;

[0043] Description of reference numerals:

[0044] 1. CPⅠ coordinate point; 2. CPⅡ coordinate point; 3. CPⅢ coordinate point; 5. Laser tracker station location; 51. Station location inside the tube-beam tunnel; 52. Station location at the end of the tube-beam tunnel. DETAILED DESCRIPTION

[0045] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0046] It should be further explained that the drawings and implementation modes of the present invention mainly describe the concept of the present invention. On the basis of this concept, the specific forms and settings of some connection relationships, positional relationships, power mechanisms, power supply systems, hydraulic systems and control systems may not be fully described. However, on the premise that those skilled in the art understand the concept of the present invention, those skilled in the art can implement the above-mentioned specific forms and settings in a well-known manner.

[0047] When an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or indirectly on the other element. When an element is referred to as being "connected to" another element, it may be directly connected to the other element or indirectly connected to the other element.

[0048] The directions or positional relationships indicated by terms such as “length”, “width”, “up”, “down”, “front”, “back”, “left”, “right”, “vertical”, “horizontal”, “top”, “bottom”, “inside” and “outside” are based on the directions or positional relationships shown in the accompanying drawings and are only for the convenience of describing the present invention and simplifying the description. They do not indicate or imply that the devices or elements referred to must have a specific direction, be constructed and operate in a specific direction, and therefore should not be understood as limiting the present invention.

[0049] The terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, "multiple" means two or more, and "several" means one or more, unless otherwise clearly and specifically defined.

[0050] Please also read Figure 1 and Figure 2 Now, a method for positioning and construction measurement of an ultra-high-speed low-vacuum pipe-beam tunnel provided by the present invention is described.

[0051] A method for positioning and construction measurement of an ultra-high-speed low-vacuum tube-beam tunnel, comprising:

[0052] S1. Carry out primary (CPⅠ) layout and secondary (CPⅡ) layout of the line control network in the area where the maglev transportation system is located; wherein, the primary layout adopts CPⅠ coordinate point 1, and the secondary layout adopts CPⅡ coordinate point 2;

[0053] S2. Perform three-level encryption layout in the tube-beam tunnel of the maglev transportation system; wherein the three-level layout adopts CPⅢ coordinate point 3;

[0054] S3, using a laser tracker to measure each monitoring point in the tube-beam tunnel, obtaining the actual coordinates and the first line shape of the tube-beam tunnel, and combining the theoretical values ​​of each monitoring point in the tube-beam tunnel to obtain a first correction value;

[0055] S4. Based on the first correction value, adjusting the pipe-beam tunnel for the first time;

[0056] S5, using a laser tracker to perform secondary measurement on each monitoring point in the pipe-beam tunnel after adjustment to obtain a first corrected line shape; combining the theoretical values ​​of each monitoring point in the pipe-beam tunnel to obtain a second corrected value;

[0057] S6. Based on the second correction value, perform a second adjustment on the pipe-beam tunnel;

[0058] S7. Repeat steps S3-S6 until the adjustment is completed.

[0059] The present embodiment provides a method for positioning and measuring a construction method using a laser tracker, a method for positioning and measuring an ultra-high-speed low-vacuum pipe-beam. Compared with the prior art, the method for positioning and measuring a construction method using a laser tracker is provided with a three-level control network, and the actual coordinates and the first linear shape are obtained after the monitoring points in the pipe-beam tunnel are measured by a laser tracker. After the correction value is obtained by comparing the theoretical value with the actual value, the pipe-beam tunnel is adjusted multiple times. The method combines the advantages of the total station in the project for measuring long and large lines, and utilizes the short-distance and high-precision measurement characteristics of the laser scanner, fully combines the best advantages of the two measurement methods or measuring instruments, adopts the idea of ​​learning from each other's strengths and weaknesses, accurately locates the absolute coordinates of any installation position of all equipment in long and large lines, and achieves the effect of rapid installation and positioning of precision equipment in ultra-high-speed low-vacuum pipe-beam tunnels.

[0060] Specifically, measuring and obtaining the first alignment of the pipe-beam tunnel includes the following steps:

[0061] The CPⅠ coordinate point 1 obtained in step S1 forms a first control network and the CPⅡ coordinate point 2 obtained forms a second control network;

[0062] The CPⅢ coordinate point 3 obtained in step S2 is obtained to form a third control network;

[0063] The actual coordinates of the tube-beam tunnel are measured and obtained based on the first control network, the second control network and the third control network, so as to fit the first line shape of the tube-beam tunnel.

[0064] Specifically, the first control network is the first CPI geodetic quadrilateral control network. During the actual construction process, a CPI coordinate point 1 is arranged at each of the four corners of the pipe-beam tunnel. The four CPI coordinate points 1 constitute the first CPI geodetic quadrilateral control network.

[0065] The CPⅡ coordinate point 2 on the second control network and the CPⅢ coordinate point 3 on the third control network can refer to the following: Figure 1 Arrange it in the position.

[0066] On the basis of the above embodiment, the actual coordinates of the pipe-beam tunnel after being measured based on the first control network, the second control network and the third control network include:

[0067] Measuring the actual coordinates of the pipe-beam tunnel based on the first control network;

[0068] The second control network and the third control network are used synchronously to measure and correct the measurement points of the first control network, so as to obtain the actual coordinates of the pipe-beam tunnel and finally fit the first line shape.

[0069] Furthermore, the obtained three-dimensional coordinates of CPⅡ coordinate point 2 include:

[0070] Use GNSS static measurement to obtain the plane coordinates of CPⅡ coordinate point 2;

[0071] A coaxial target frame of fixed height is installed on each CPⅡ coordinate point 2, and a coaxial elevation point with the CPⅡ coordinate point 2 is set on the prism convex head of the target;

[0072] The coaxial elevation of each coaxial elevation point of CPⅡ is obtained by measuring the coaxial level route.

[0073] Specifically, the step of obtaining the first corrected line shape includes:

[0074] After the first adjustment is completed, multiple pairs of CPⅢ coordinate points 3 are symmetrically arranged in the tube-beam tunnel from the middle of the tube-beam tunnel to both ends of the tube-beam tunnel;

[0075] A laser tracker is placed in the pipe-beam tunnel, and the three-dimensional coordinates of the laser tracker are obtained through the first control network, and the three-dimensional coordinates of the CPⅢ coordinate point 3 are obtained by measuring with the laser tracker;

[0076] According to the three-dimensional coordinates of the CPⅢ coordinate point 3, the first line shape of the pipe-beam tunnel after adjustment is obtained.

[0077] Furthermore, when the three-dimensional coordinates of the laser tracker are obtained through the first control network, the second control network and the third control network are synchronously used to measure and correct the coordinates of the CPI coordinate point 1 of the first control network.

[0078] On the basis of the above embodiment, a laser tracker is placed in the pipe-beam tunnel, and the three-dimensional coordinates of the laser tracker are obtained through the first control network. The three-dimensional coordinates of the CPⅢ coordinate point 3 are obtained by measuring with the laser tracker, including:

[0079] After the first adjustment is completed, two laser trackers are placed in the mid-span area of ​​the tube-beam tunnel, and the two laser trackers measure the three-dimensional coordinates of the CPⅢ coordinate point 3 at both ends of the tube-beam tunnel in sequence;

[0080] A plurality of pairs of CPⅢ coordinate points 3 are set at equal intervals from the mid-span to both ends of the tube-beam tunnel.

[0081] During the specific implementation, the spacing between the multiple pairs of CPⅢ coordinate points 3 is 15m-30m, and the laser tracker can be placed at any position in the pipe-beam tunnel for station establishment.

[0082] Based on the above embodiment, the fine adjustment and installation of the pipe-beam tunnel based on the first alignment and the first modified alignment includes:

[0083] According to the first linear shape and the first corrected linear shape, a coordinate adjustment difference of each CPⅢ coordinate point 3 is obtained;

[0084] According to the coordinate adjustment difference, the pipe-beam tunnel is fine-tuned and installed.

[0085] Then, the tube-beam tunnel is fine-tuned again for a second time, using the same method as the first adjustment.

[0086] Based on the above embodiment, the laser tracker station in the pipe-beam tunnel can be installed at any position in the pipe-beam tunnel. Figure 2 It is a schematic diagram of the control points required for setting up the laser tracker station at the local position of the pipe beam tunnel of the present invention, wherein the pipe beam tunnel end station position 52 is set at both ends of the pipe beam tunnel. When the laser tracker is set here, the coordinates of the CPⅢ coordinate point 3 can be measured from the end to the mid-span;

[0087] The laser tracker is set up in the pipe-beam tunnel (refer to Figure 2 After the station is established at the station location 51 in the pipe-beam tunnel, the coordinates of CPⅢ coordinate point 3 are measured from the mid-span to both ends of the pipe-beam tunnel, so as to conduct a secondary remeasurement of the coordinates of CPⅢ coordinate point 3 and prevent omission of monitoring points.

[0088] Specifically, the CPⅢ coordinate point 3 can be increased or decreased to varying degrees according to actual measurement conditions.

[0089] In summary, the first linear shape of the pipe-beam tunnel is obtained by fitting the actual coordinates, and the corrected difference linear shape is obtained by combining the theoretical linear shape; based on the corrected difference linear shape, the first corrected linear shape is obtained after the first adjustment of the pipe-beam tunnel, and the first corrected linear shape is corrected again by combining the theoretical linear shape to obtain the second linear shape, and the above steps are repeated to fine-tune the pipe-beam tunnel until it is adjusted to meet the design requirements. At the same time, this method is equipped with a three-level control network, and the actual coordinates and the first linear shape are obtained by measuring the monitoring points in the pipe-beam tunnel using a laser tracker. After the correction value is obtained by comparing the theoretical value with the actual value, the pipe-beam tunnel is adjusted multiple times. This method combines the advantages of the total station in the project for measuring long and large lines, and utilizes the short-distance high-precision measurement characteristics of the laser scanner, fully combines the best advantages of the two measurement methods or measuring instruments, and adopts the idea of ​​learning from each other's strengths and weaknesses. The absolute coordinates of any installation position of all equipment in long and large lines are accurately located, and the effect of rapid installation and positioning of precision equipment in ultra-high-speed low-vacuum pipe-beam tunnels is achieved.

[0090] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A method for positioning and construction measurement of ultra-high-speed low-vacuum pipe-beam tunnels, characterized in that: include: S1. Carry out primary layout of the area where the maglev transportation system is located and secondary layout of the line control network; S2. Conduct three-level encryption deployment in the pipe-beam tunnel of the maglev transportation system; S3, using a laser tracker to measure each monitoring point in the tube-beam tunnel, obtaining the actual coordinates and the first line shape of the tube-beam tunnel, and combining the theoretical values ​​of each monitoring point in the tube-beam tunnel to obtain a first correction value; S4. Based on the first correction value, adjusting the pipe-beam tunnel for the first time; S5, using a laser tracker to perform secondary measurement on each monitoring point in the pipe-beam tunnel after adjustment to obtain a first corrected line shape; combining the theoretical values ​​of each monitoring point in the pipe-beam tunnel to obtain a second corrected value; S6. Based on the second correction value, perform a second adjustment on the pipe-beam tunnel; S7. Repeat steps S3-S6 until the adjustment is completed.

2. The ultra-high-speed low-vacuum tube-beam tunnel positioning construction measurement method according to claim 1, characterized in that: Measuring and obtaining the first alignment of the pipe-beam tunnel comprises the following steps: The CPⅠ coordinate points obtained in step S1 form a first control network and the CPⅡ coordinate points obtained form a second control network; The CPⅢ coordinate points obtained in step S2 are obtained to form a third control network; The actual coordinates of the tube-beam tunnel are measured and obtained based on the first control network, the second control network and the third control network, so as to fit the first line shape of the tube-beam tunnel.

3. The method for positioning and measuring an ultra-high-speed low-vacuum tube-beam tunnel as claimed in claim 2, characterized in that: The actual coordinates of the pipe-beam tunnel obtained by measuring based on the first control network, the second control network and the third control network include: Measuring the actual coordinates of the pipe-beam tunnel based on the first control network; The second control network and the third control network are used synchronously to measure and correct the measurement points of the first control network, so as to obtain the actual coordinates of the pipe-beam tunnel and finally fit the first line shape.

4. The method for positioning and measuring an ultra-high-speed low-vacuum tube-beam tunnel as claimed in claim 2, characterized in that: The obtained three-dimensional coordinates of the CPⅡ coordinate point include: Use GNSS static measurement to obtain the plane coordinates of the CPⅡ coordinate points; A coaxial sighting mark frame of fixed height is installed at each CPⅡ coordinate point, and a coaxial elevation point with the CPⅡ coordinate point is set on the prism convex head of the sighting mark; The coaxial elevation of each coaxial elevation point of CPⅡ is obtained by measuring the coaxial level route.

5. The ultra-high-speed low-vacuum tube-beam tunnel positioning construction measurement method according to claim 4, characterized in that: The step of obtaining the first corrected line shape comprises: After the first adjustment is completed, multiple pairs of CPⅢ coordinate points are symmetrically arranged in the tube-beam tunnel from the middle of the tube-beam tunnel to both ends of the tube-beam tunnel; Placing a laser tracker in the pipe-beam tunnel, acquiring the three-dimensional coordinates of the laser tracker through the first control network, and acquiring the three-dimensional coordinates of the CPⅢ coordinate point through the laser tracker; According to the three-dimensional coordinates of the CPⅢ coordinate point, the first line shape of the pipe-beam tunnel after adjustment is completed is obtained.

6. The method for positioning and measuring an ultra-high-speed low-vacuum tube-beam tunnel as claimed in claim 5, characterized in that: When the three-dimensional coordinates of the laser tracker are obtained through the first control network, the second control network and the third control network are synchronously used to measure and correct the coordinates of the CPI coordinate points of the first control network.

7. The method for positioning and measuring an ultra-high-speed low-vacuum tube-beam tunnel as claimed in claim 5, characterized in that: Placing a laser tracker in the pipe-beam tunnel, acquiring the three-dimensional coordinates of the laser tracker through the first control network, and acquiring the three-dimensional coordinates of the CPⅢ coordinate point through the laser tracker, including: After the first adjustment is completed, two laser trackers are placed in the mid-span area of ​​the tube-beam tunnel, and the two laser trackers measure the three-dimensional coordinates of the CPⅢ coordinate points at both ends of the tube-beam tunnel in sequence; A plurality of pairs of CPⅢ coordinate points are set at equal intervals from the mid-span to both ends of the tube-beam tunnel.

8. The method for positioning and measuring an ultra-high-speed low-vacuum tube-beam tunnel as claimed in claim 7, characterized in that: The spacing distance between the multiple pairs of CPⅢ coordinate points is 15m-30m.

9. The method for positioning and measuring an ultra-high-speed low-vacuum tube-beam tunnel as claimed in claim 7, characterized in that: The step of fine-tuning and installing the pipe-beam tunnel based on the first alignment and the first modified alignment includes: According to the first linear shape and the first corrected linear shape, a coordinate adjustment difference value of each CPⅢ coordinate point is obtained; According to the coordinate adjustment difference, the pipe-beam tunnel is fine-tuned and installed.

10. The method for positioning and measuring an ultra-high-speed low-vacuum tube-beam tunnel as claimed in claim 9, characterized in that: The tube-beam tunnel is fine-tuned again for a second time using the same method as the first adjustment.

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