Control network layout method for precise measurement of high-speed pipeline maglev train tracks

Abstract

The present invention provides a control network layout method for precise measurement of high-speed pipeline maglev train tracks, comprising the following steps: S100, obtaining the quantity and position information of CP0 control points in a construction area; S200, formulating a layout plan for CPI control points in the construction area based on the obtained quantity and position information of the CP0 control points; S300, determining the layout information of CPIII control points based on the layout plan of the CPI control points; S400, carrying out construction according to the layout plan of the CPI control points; S500, respectively re-measuring the position information of the CP0 control points, the CPI control points, and the CPIII control points. The control network layout method provided by the present invention can reduce measurement errors and system errors of the control network by re-measuring the CP0 control points and the CPI control points, and by shortening the layout spacing of the CPIII control points, provide more reference points for the construction process, which is conducive to improving the measurement accuracy of the control network.

Description

Technical Field

[0001] The invention belongs to the field of measurement technology, and more specifically relates to a control network layout method for precise measurement of high-speed pipeline maglev train tracks. Background Art

[0002] An engineering control network refers to a specialized measurement and control network deployed for engineering construction. Designed to meet the needs of various types of engineering construction, construction layout, and safety monitoring, engineering control networks are typically deployed in different configurations, depending on the project size, the terrain of the location, and the type of construction, with varying accuracy requirements.

[0003] With the rapid development of railway construction in recent years, the layout of high-speed railway control networks has gradually matured and become controllable. Dedicated control networks are an indispensable and important component of railway measurement systems, playing a vital role. As China's first high-speed, low-vacuum tube maglev transportation system, trains can operate at speeds of up to 1,000 km / h. Because of the high speed, high reliability, and passenger comfort required, the smoothness of the track laying is extremely demanding, which in turn places even higher demands on the measurement accuracy of the control network.

[0004] The existing dedicated control network is essentially laid out according to existing high-speed rail specifications (with control point spacing of 60-80m). Train tracks constructed based on the measurement accuracy of this control network can reach speeds of up to 650km / h, which is insufficient to meet the construction requirements of a high-speed, low-vacuum, maglev transportation system. In practice, 0.5-inch high-precision total stations are currently used. Using the commonly used third-class or second-class tunnel plane control network for measurement, the accuracy would not meet the line's accuracy requirements. Consequently, rework is often required due to unsatisfactory construction accuracy, significantly restricting the work of all parties involved and seriously impacting project progress. Summary of the Invention

[0005] The purpose of the present invention is to provide a control network layout method for accurate measurement of high-speed pipeline maglev train tracks, aiming to achieve accurate measurement of high-speed low-vacuum pipeline maglev train tracks.

[0006] To achieve the above-mentioned object, the present invention adopts a technical solution of providing a control network layout method for precise measurement of high-speed pipeline maglev train tracks, comprising the following steps:

[0007] S100, obtaining the quantity and location information of CPO control points in the construction area;

[0008] S200: Formulate a layout plan for CPI control points in the construction area based on the acquired quantity information and location information of the CPO control points, determine the quantity information and location information of the CPI control points, and ensure that the distance between two adjacent CPI control points is greater than 300 m;

[0009] S300, determining arrangement information of CPIII control points according to the arrangement plan of the CPI control points, determining the number information and position information of the CPIII control points, and determining that the distance between two adjacent CPIII control points is 25m to 30m;

[0010] S400, performing construction according to the arrangement plan of the CPI control points, pre-embedding CPI observation piers at the CPI control points; and performing construction according to the arrangement plan of the CPIII control points;

[0011] S500 , re-measure the position information of the CP0 control point, the CPI control point, and the CPIII control point respectively.

[0012] In a possible implementation, in S300 , the CPIII control point is set at a fixed end of a hole beam support, and a distance between the CPIII control point and an inner edge of the hole beam is 12 cm to 16 cm.

[0013] In a possible implementation, S400 specifically further includes:

[0014] S410, searching and determining the position of the CPIII control point;

[0015] S420: embed a detection component at the CPIII control point.

[0016] In one possible implementation, the detection component includes an embedded part buried in the CPIII control point, and a detection part plugged into the embedded part. The embedded part is provided with a detection groove along the axial direction, the detection part is inserted into the detection groove, and a clearance hole is also provided at the bottom of the detection part.

[0017] In a possible implementation, the detection member is provided with a ventilation groove extending vertically along the axial direction, and a ventilation space is formed between the ventilation groove and the detection groove.

[0018] In one possible implementation, the detection component also includes a snap-in mechanism for connecting the detection part and the embedded part, the snap-in mechanism includes a first snap-in module provided on the detection part, and a second snap-in module provided in the detection groove, the first snap-in module and the second snap-in module being snap-fitted together.

[0019] In a possible implementation, the second card connection module includes an insert block provided at the bottom of the detection slot, and a card slot is defined on an outer peripheral surface of the insert block; the first card connection module includes:

[0020] A mounting block is provided at the bottom of the detection member, wherein the bottom of the mounting block is provided with a slot for plugging into the plug block, and an inner wall of the slot is provided with a mounting groove in a radial direction; and

[0021] An elastic clamping piece is arranged in the installation slot, and the elastic clamping piece can be expanded and contracted along the radial direction of the slot, and is used for clamping with the clamping slot.

[0022] In a possible implementation, the mounting slot includes a slot body and a limiting protrusion located at an open end of the slot body, and the elastic clip includes:

[0023] A clamping ball is provided in the groove body, the outer end surface of the clamping ball protrudes outward from the groove body, and the limiting protrusion is used to limit the clamping ball in the groove body; and

[0024] The first elastic member is disposed in the groove body, and the first elastic member is configured to have a pre-tightening force that causes the locking ball to abut against the limiting protrusion.

[0025] In a possible implementation, the first card connection module includes:

[0026] a fixed block disposed at the bottom of the detection member, wherein the bottom of the fixed block is provided with a locking groove along its own axial direction, and the fixed block is provided with a sliding groove along a first direction, the first direction being perpendicular to the axis of the fixed block, and the sliding groove is connected to the locking groove;

[0027] a slider slidably disposed in the slide groove, wherein the free end of the slider has an inclined guide surface; and

[0028] a second elastic member disposed in the slide groove, and the second elastic member is configured with a pre-tightening force to cause the slider to slide into the locking groove;

[0029] The second card connection module includes:

[0030] A fastening block, provided at the bottom of the detection slot and used for plugging into the locking slot;

[0031] a connecting piece, provided on the top of the fastening block;

[0032] A first locking block is slidably sleeved on the outside of the connecting member, and the outer circumference of the first locking block gradually decreases from top to bottom; and

[0033] a second locking block, disposed on the top of the connecting member, wherein the outer circumference of the second locking block gradually increases from top to bottom, and the outer circumference of the connecting member is concave inwardly of the first locking block and the second locking block;

[0034] The slider has a locked state in which it is inserted between the first locking block and the second locking block; a switching state in which it is inserted between the fastening block and the first locking block; and an unlocked state in which it is separated from the first locking block, the second locking block and the fastening block.

[0035] In a possible implementation, a plurality of the sliding grooves are provided around the axis of the fixed block, and the sliding block and the second elastic member are correspondingly provided in each of the sliding grooves.

[0036] The control network layout method for precise measurement of high-speed pipeline maglev train tracks provided by the present invention has the following advantages: compared with the existing technology, the layout of the CPI control points is determined based on the CP0 control point, and the layout of the CPIII control points is then determined based on the CPI control point. This allows for a multi-level layout approach, whereby the layout of the lower-level control points is determined based on the upper-level control points, resulting in higher-precision layout of the CPIII control points. By re-measuring the CP0 and CPI control points, measurement errors and system errors in the control network can be reduced. By reducing the spacing between the CPIII control points, more reference points are provided during the construction process, resolving the problem of existing reference points being easily blocked due to long spacing, and thus improving the measurement accuracy of the control network. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0038] Figure 1 A schematic diagram of the steps of a control network deployment method for precise measurement of a high-speed pipeline maglev train track provided in the first embodiment of the present invention;

[0039] Figure 2 A schematic diagram of the layout of a control network for precise measurement of a high-speed tube maglev train track provided in the first embodiment of the present invention;

[0040] Figure 3 A cross-sectional view of the embodiment of the present invention;

[0041] Figure 4 This is a schematic diagram of the arrangement of CPIII control points and CPI control points used in Example 1 of the present invention;

[0042] Figure 5 A top view of the mounting block and the insert block used in the second embodiment of the present invention;

[0043] Figure 6 A partial cross-sectional view of the clamping mechanism used in the second embodiment of the present invention;

[0044] Figure 7 This is a cross-sectional view of the locking state of the latching mechanism used in the third embodiment of the present invention;

[0045] Figure 8 A cross-sectional view of the locking mechanism in the unlocked state used in the third embodiment of the present invention;

[0046] Figure 9 This is a cross-sectional view of the switching state of the clamping mechanism used in the third embodiment of the present invention.

[0047] In the figure: 1. CP0 control point; 2. CPI control point; 3. CPIII control point; 4. detection component; 41. detection part; 410. clearance hole; 42. embedded part; 5. free measuring station; 51. first free measuring station; 52. second free measuring station; 6. pipeline; 7. second card connection module; 71. fastening block; 72. second locking block; 73. first locking block; 74. plug-in block; 741. card slot; 75. connecting part; 8. first card connection module; 81. fixing block; 82. locking slot; 84. slider; 85. mounting block; 86. elastic card; 87. second elastic part; 88. first elastic part; 89. mounting slot. DETAILED DESCRIPTION

[0048] 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 with reference to 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 intended to limit the present invention.

[0049] Please also refer to Figure 1 and Figure 2 The control network layout method for accurate measurement of high-speed pipeline maglev train tracks provided by the present invention is now described. It includes the following steps:

[0050] S100, obtaining the quantity and location information of CP0 control point 1 in the construction area;

[0051] S200, formulating a layout plan for CPI control points 2 in the construction area based on the acquired quantity information and location information of CPI control points 1, determining the quantity information and location information of CPI control points 2, and ensuring that the distance between two adjacent CPI control points 2 is greater than 300 m;

[0052] S300, determining the arrangement information of CPIII control point 3 according to the arrangement plan of CPI control point 2, determining the number information and position information of CPIII control point 3, and the distance between two adjacent CPIII control points 3 is 25m to 30m;

[0053] S400, construction is carried out according to the arrangement plan of CPI control point 2, and a CPI observation pier is pre-buried at CPI control point 2; and construction is carried out according to the arrangement plan of CPIII control point 3;

[0054] S500 , re-measure the position information of CP0 control point 1, CPI control point 2, and CPIII control point 3 respectively.

[0055] The beneficial effect of the control network layout method for precise measurement of high-speed pipeline maglev train tracks provided by the present invention is that: compared with the existing technology, the layout scheme of CPI control point 2 is determined based on CP0 control point 1, and then the layout scheme of CPIII control point 3 is determined based on CPI control point 2. This can utilize a multi-level division method to determine the layout of lower-level control points based on upper-level control points, making the layout accuracy of CPIII control point 3 higher. After determining the layout scheme, construction is carried out according to the layout scheme, and finally, CP0 control point 1, CPI control point 2 and CPIII control point 3 are re-measured respectively, which can reduce the error between the actual control points and the predicted control points of the control network. By reducing the layout spacing of CPIII control point 3, more reference points are provided for the construction process, solving the problem that the existing reference point spacing is too long and easily blocked, and is conducive to improving the measurement accuracy of the control network.

[0056] At the same time, the CPI observation piers set up with mutual visibility (i.e., there is no observation obstruction between two adjacent CPI observation piers) facilitate the observation of different stages in the pipeline 6 and the layout of the CPIII level control network.

[0057] Optional observation piers are forced-centering piers, designed to enforce the centering of surveying instruments. They feature a stainless steel centering plate with screws at the top, ensuring instrument centering errors are controlled to approximately 0.1mm. A galvanized connecting tube is located in the center, and a fixed base with screw holes at the bottom allows for easy pre-embedded placement within the concrete pier, securing it to the site. The concrete pier's lower structure is appropriately enlarged and pre-reinforced with steel reinforcement, enhancing its strength and stability after pouring. When using the observation pier for surveying, no tripod is required. The instrument (or target) base is directly connected to the observation pier via screws and tightened so that its bottom surface rests firmly on the centering plate. Once the instrument is leveled, the center of the centering plate represents the point center, minimizing the effects of instrument height and centering errors. Furthermore, the forced-centering pier utilizes a widened and internally reinforced base for embedding, ensuring the stability, accuracy, and robustness of the CPI Control Point 2 position.

[0058] At the inlet and outlet of the pipeline 6 in the construction area, the sum of the number of CPI control points 2 and CPIII control points 3 is not less than three; the distance between two adjacent CPIII control points 3 is 25m to 30m.

[0059] Please note that Figure 4 GNSS static measurement was used for the re-survey and encryption of CPO control point 1 and CPI control point 2 outside the construction pipeline 6. The re-survey and encryption of the CPI control network were observed in accordance with the technical requirements of the second-class GPS network. The operation methods, accuracy indicators, and instruments used were all implemented in accordance with the relevant requirements of the "Railway Engineering Survey Specifications". The basic requirements for GPS measurement operations at all levels are detailed in the table below:

[0060]

[0061] When observing, the following points should be noted:

[0062] (1) A dual-frequency GPS receiver with a nominal accuracy of not less than 3mm + 1ppm should be used, and there should be no less than four GPS receivers for simultaneous observation.

[0063] (2) The following table shows the technical requirements for CPO control point 1 observation:

[0064]

[0065] (3) The observation periods should be evenly distributed during the day and night. There should be at least one night observation period, and each period should not exceed 8:00 a.m. Beijing time.

[0066] (4) The antenna should be placed in a strictly horizontal and centered position, and the antenna centering error should not exceed 1mm. The antenna height should be measured once before the measurement (before turning on the power) and after the measurement (after turning off the power). Each time, the antenna should be measured from three different directions at the same position, or measured using a special beam height gauge for the receiver antenna. When the difference between the repeated readings of the antenna height is no more than ±2mm, the average value is taken as the single antenna height observation value; when the difference between the antenna height observation values before and after the measurement is no more than ±3mm, the average value is taken as the final antenna height observation value.

[0067] (5) During the same observation period, the instrument shall not be shut down and restarted, the instrument parameter settings shall not be changed, and the antenna position shall not be rotated.

[0068] (6) If thunderstorms or storms occur during the observation process, the current observation operation should be stopped immediately.

[0069] In some embodiments, see Figure 1 and Figure 2 In S300, the CPIII control point 3 is set at the fixed end of the hole beam support, and the distance between the CPIII control point 3 and the inner edge of the hole beam is 12cm-16cm.

[0070] Such a setting can increase the fault tolerance when laying out a multi-level control network and reduce the measurement error and system error of the control network.

[0071] Optionally, the CP0 control points 1 are arranged in a rectangular or triangular shape to cover the entire construction area, so as to increase the number of starting points when laying out the multi-level control network, thereby helping to improve the overall starting benchmark and measurement accuracy of the multi-level control network.

[0072] Optionally, CPIII control point 3 is located at the fixed end of a single beam support, 15 cm from the inner edge of the beam. CPO control points are constructed using an edge-linked network, forming a completely enclosed network of triangles or geodesic quadrilaterals. CPIII control point 3 is uniformly adjusted to increase error tolerance and reduce measurement and system errors within the control network.

[0073] It should be noted that the cross-section of the hole beam is "U"-shaped, and a plurality of hole beams connected end to end are arranged in the pipeline 6, and the length of a single hole beam is 3m to 6m.

[0074] With this setting, the position of CPIII control point 3 can be adjusted by adjusting the position of the fixed end of the support, thereby facilitating a more accurate adjustment of the layout position of a single hole beam.

[0075] Optional, see Figure 4The observation of CPIII control point 3 adopts the free station full circle observation method. With CPI control point 2 as the starting constraint point, free station points 5 are set along the width direction of pipeline 6. Among them, the first free station point 51 is set between two staggered corresponding CPIII control points 3. Each first free station point 51 is used to observe the six CPIII control points 3 adjacent to it.

[0076] With such an arrangement, for each CPIII control point 3 in the pipeline 6 , there are four first free measuring stations 51 to measure it, which is beneficial to improving the observation accuracy of the CPIII control point 3 .

[0077] Optionally, according to the size and number of the inner hole beams of the pipeline 6, the number of the CPIII control points 3 observed by the first free measuring station 51 can be appropriately reduced.

[0078] Optionally, second free measuring stations 52 are set along the width direction of the pipeline 6 and at both ends of the pipeline 6, between the corresponding CPI control points 2 and CPIII control points 3. Each second free measuring station 52 is used to observe the CPIII control points 3 and CPI control points 2 adjacent to it, a total of 6.

[0079] With such an arrangement, the CPIII control point 3 and the CPI control point 2 can also be measured simultaneously by using the set second free measuring station 52 .

[0080] Optionally, the data of the CPIII control point 3 observed by the second free station 52 is jointly measured with the data of the CPIII control point 3 observed by the first free station 51 to further improve the observation accuracy of the free station full circle observation method.

[0081] Optionally, the observation distance between the two second free station points 52 for observing the CPI control point 2 is no more than 300 m.

[0082] When the density of CPI control point 2 does not meet the joint measurement requirements of CPIII control point 3, additional CPI control point 2 should be added by interpolation with the same accuracy. In addition, a CPI control point 2 or CPIII control point 3 can be joint measured every 600m (±50m) through the first free measuring station 51 or the second free measuring station 52.

[0083] Such a setting can enhance the observation accuracy of the CPI control point 2 and the CPIII control point 3 and maximize the use of the limited number of the first free station points 51 and the second free station points 52 .

[0084] Optional, see Figure 1 The control network layout method for accurate measurement of high-speed pipeline maglev train tracks also includes the following steps:

[0085] S600: sorting the observation record data and generating adjustment data files;

[0086] S700: Analyze the adjustment data file rows to obtain the accuracy information of CPIII control point 3 and CPI control point 2.

[0087] It should be noted that, in this embodiment, the observation and recorded data may be the data of observing CP0 control point 1, or the data of observing CPI control point 2 and CPIII control point 3.

[0088] With this setting, based on the analysis of the adjustment data file, the observation data with large errors can be screened out, and the screened out data with large errors can be re-measured, or the control points with large errors can be adjusted, which is beneficial to increase the layout accuracy of various control points.

[0089] Optionally, weight the distance data observed by the free-station full-circle observation method. The weighting formula is: sqrt(A*A+B*B*S*S);

[0090] Wherein, A is the short-distance side length observed by the first free station 51 or the second free station 52, B is the long-distance side length observed by the first free station 51 or the second free station 52, and S is the area of the triangle formed by the first free station 51 and any two CPIII control points 3 or CPI control points 2 observed by it, or the area of the triangle formed by the second free station 52 and any two CPIII control points 3 or CPI control points 2 observed by it.

[0091] The limit vector solution of the CPI control network uses precise ephemeris and Leica LGO software for baseline solution, and uses Kesha software for adjustment.

[0092]

[0093] (1) Data transmission and preprocessing: The data recorded by field observations are transferred to the computer for data sorting and checking to see whether the standard indicators such as half-measurement regression zero difference, 2C mutual difference in the same direction of different measurement rounds, and direction value difference after zeroing in the same direction meet the requirements;

[0094] (2) Set the adjustment parameters after generating the adjustment file.

[0095] Among them, the unit weight is selected as the a posteriori unit weight, the estimate file is selected as the conventional network estimate, and the adjustment iteration limit is selected as 20cm.

[0096] The data calculation and adjustment processing of the CPIII control network plane adopts Survey Adjust, a general adjustment software for high-speed railways jointly developed by China Railway Eryuan Engineering Group Co., Ltd. and Southwest Jiaotong University.

[0097] Free network adjustment checks the internal accuracy of observation data and its compatibility with the known coordinates of various control points. Adjustment results include: approximate coordinates, direction adjustment results, distance adjustment results, adjusted coordinates and their accuracy, weakest point and its accuracy, azimuth side length and its relative accuracy, overall information about the horizontal control network, and coordinates after coordinate transformation and their accuracy.

[0098] The azimuth, side length and accuracy after adjustment are shown in the table below.

[0099]

[0100]

[0101] Optionally, a verification step is also included to check the observation results:

[0102] (1) The results of the CPI encrypted control network have been verified on-site by a total station and are found to meet the regulatory requirements. They can be used as the starting control points for the CPIII control network survey and design.

[0103] (2) After the control network was attached, the remaining conductor parts were observed using the free measuring station corner intersection network, and joint measurement was carried out with the control network of the adjacent section. The joint measurement data was carefully checked and the joint measurement results met the requirements of the specifications.

[0104] (3) Accuracy index:

[0105] After the adjustment of the corner intersection network of the free survey stations in the tunnel, its accuracy index meets the technical requirements in the following table:

[0106] Maximum value of baseline vector asynchronous loop closure error

[0107]

[0108] Maximum value of baseline difference in repeated observations of plane control network

[0109]

[0110] Error in angle measurement:

[0111]

[0112] Distance measurement error: MD = ± 1.13 mm

[0113] The maximum positional accuracy of the CPI control point 2 in the hole beam was 1.82mm, the minimum was 0.68mm, and the average was 1.28mm. The maximum positional accuracy of the CPIII control point 3 was 0.7mm, the minimum was 0.2mm, and the average was 0.4mm. These meet the design requirements for vacuum maglev.

[0114] As set above, by further checking the data, it is possible to further determine whether the observed data is accurate and whether the various control points for laying are appropriate, thereby facilitating the accurate laying of the pipeline 6 during the construction process.

[0115] In some embodiments, referring to step 3, in order to more accurately arrange the CPIII control point 3, step S400 specifically further includes:

[0116] S410, searching and determining the position of CPIII control point 3;

[0117] S420 , burying the detection component 4 at the CPIII control point 3 .

[0118] The above method can more accurately determine the position of CPIII control point 3, providing a more accurate reference for the layout of the hole beam. In addition, the present invention can also use the free station method to complete the measurement of CPIII control point 3 in the pipeline 6, achieving the expected effect, and has a high reference and reference significance for the measurement and construction of high-precision control networks in similar tubular channels in the future. The reference basis of this embodiment is without the free station method.

[0119] In some embodiments, see Figures 5 to 9 The detection component 4 includes an embedded part 42 buried in the CPIII control point 3, and a detection part 41 plugged into the embedded part 42. The embedded part 42 is provided with a detection groove along the axial direction, the detection rod is inserted into the detection groove, and a clearance hole 410 is also provided at the bottom of the detection part 41.

[0120] In this embodiment, the provision of a detection member 41 and embedded member 42 facilitates obtaining the position information of the CPIII control point 3 by externally observing the detection member 41, thereby facilitating adjustment of the position of the beam. The provision of a clearance hole 410 can relieve stress on the bottom of the detection member 41 during the manufacturing process, thereby preventing the detection member 41 from deforming during extended use.

[0121] Optionally, the detection component 41 is cylindrical in shape, and the embedded component 42 is cylindrical in shape.

[0122] In some embodiments, the detection member 41 is provided with a ventilation groove extending vertically along the axial direction, and a ventilation space is formed between the ventilation groove and the detection groove.

[0123] With such arrangement, during the process of inserting and removing the detection component 41 from the embedded component 42, air can flow out from the ventilation groove, thereby helping to improve the air cap problem caused by excessively high machining precision.

[0124] Optionally, in order to further enhance the assembly accuracy between the detection part 41 and the embedded part 42 , a single detection part 41 and a single embedded part 42 are manufactured from the same production line to reduce the tolerance between the detection part 41 and the embedded part 42 .

[0125] In some embodiments, the detection component 4 also includes a clamping mechanism for connecting the detection part 41 and the embedded part 42. The clamping mechanism includes a first clamping module 8 provided on the detection part 41 and a second clamping module 7 provided in the detection groove. The first clamping module 8 is clamped and matched with the second clamping module 7.

[0126] In this embodiment, the first clamping module 8 and the second clamping module 7 are engaged with each other to make the connection between the detection member 41 and the embedded member 42 more stable, thereby preventing the detection member 41 from being loosened on the embedded member 42 .

[0127] Optionally, considering that the detection part 41 and the embedded part 42 are both made of steel, a magnetic attraction structure can be set between the bottom of the detection part 41 and the embedded part 42. The magnetic attraction structure includes a neodymium magnet set on the detection part 41 or the embedded part 42. The magnetic force provided by the neodymium magnet is used between the detection part 41 and the embedded part 42 to prevent the detection part 41 from loosening from the embedded part 42.

[0128] In some embodiments, see Figure 5 and Figure 6 The second engaging module 7 includes an insert block 74 disposed at the bottom of the detection slot, with an outer surface of the insert block 74 defining an engaging slot 741. The first engaging module 8 includes a mounting block 85 and an elastic engaging member 86. The mounting block 85 is disposed at the bottom of the detection member 41, and defines a slot for engaging with the insert block 74. The slot also defines a radially extending mounting slot 89 on the inner wall of the slot. The elastic engaging member 86 is disposed within the mounting slot 89 and is capable of radially extending and contracting along the slot. The elastic engaging member 86 is configured to engage with the engaging slot 741.

[0129] In this embodiment, by utilizing the snap connection between the elastic clip 86 and the slot 741, a stable connection between the detection component 41 and the embedded component 42 can be achieved. When the detection component 41 is pulled out from the embedded component 42, it is also necessary to overcome the elastic force of the elastic clip 86, thereby improving the problem that the detection component 41 is easily loose in the embedded component 42.

[0130] In some embodiments, the mounting slot 89 includes a slot body and a stopper located at an open end of the slot body; the elastic clamping member 86 includes a catch ball and a first elastic member 88. The catch ball is disposed in the slot body, with the outer end surface of the catch ball protruding outward from the slot body, and the stopper protrusion is used to confine the catch ball within the slot body; the first elastic member 88 is disposed in the slot body and is configured to exert a preload force that causes the catch ball to abut against the stopper protrusion.

[0131] With such a configuration, the spherical surface of the locking ball is utilized to facilitate the locking of the locking ball in the locking groove 741 under the action of the first elastic member 88 , thereby forming a locking connection between the detection member 41 and the embedded member 42 .

[0132] Optionally, the first elastic member 88 is a spring.

[0133] In some embodiments, see Figures 7 to 9 The first clamping module 8 includes a fixed block 81, a slider 84, and a second elastic member 87. The fixed block 81 is provided at the bottom of the detection member 41. The bottom of the fixed block 81 is provided with a locking groove 82 along its own axial direction, and the fixed block 81 is provided with a slide groove along a first direction, the first direction being perpendicular to the axis of the fixed block 81, and the slide groove is connected to the locking groove 82. The slider 84 is slidably provided in the slide groove, and the free end of the slider 84 has an inclined guide surface; the second elastic member 87 is provided in the slide groove, and the second elastic member 87 is configured with a pre-tightening force that causes the slider 84 to slide into the locking groove 82;

[0134] The second clamping module 7 includes a fastening block 71, a connector 75, a first locking block 73, and a second locking block 72. The fastening block 71 is located at the bottom of the detection slot and is configured to engage with the locking slot 82. The connector 75 is located at the top of the fastening block 71. The first locking block 73 slides over the connector 75, and the outer circumference of the first locking block 73 gradually decreases from top to bottom. The second locking block 72 is located at the top of the connector 75, and the outer circumference of the second locking block 72 gradually increases from top to bottom. The outer circumference of the connector 75 is concave relative to the first and second locking blocks 73 and 72.

[0135] The slider 84 has a locked state inserted between the first locking block 73 and the second locking block 72; it also has a switching state inserted between the fastening block 71 and the first locking block 73; and an unlocked state separated from the first locking block 73, the second locking block 72 and the fastening block 71.

[0136] In this embodiment, through the above arrangement, as the detection member 41 approaches the bottom wall of the detection groove, the slider 84 first retracts along the outer circumferential surface of the second locking block 72 and is stuck between the second locking block 72 and the first locking block 73. At this time, the slider 84 is in a locked state, and the detection member 41 cannot be pulled out from the embedded member 42. When a downward pressure is applied to the detection member 41 to retract the slider 84, the slider 84 can be stuck between the first locking block 73 and the fastening block 71. At this time, the slider 84 is in a switching state, and the detection member 41 is pulled upward. The slider 84 is loosened from the second clamping module 77 along the inclined surfaces of the first locking block 73 and the second locking block 72, so as to pull the detection member 41 out of the detection groove. The slider 84 is now in an unlocked state.

[0137] In this way, the connection and loosening between the detection component 41 and the embedded component 42 can be achieved through simple and convenient operations, and the stability and reliability of the connection between the two can be guaranteed.

[0138] Optionally, the shape of the free end of the slider 84 may be set to be similar to a trapezoid, so that the free end of the slider 84 can have an inclined surface for convenient transition.

[0139] Optionally, the second elastic member 87 is configured as a spring, and both ends of the spring are connected to the slider 84 and the fixing block 81 .

[0140] In some embodiments, a plurality of sliding grooves are provided around the axis of the fixed block 81 , and a slider 84 and a second elastic member 87 are correspondingly provided in each sliding groove.

[0141] With this arrangement, the connection between the detection member 41 and the embedded member 42 is made more stable by utilizing the plurality of sliders 84 and the second elastic member 87 .

[0142] Optionally, there are two sliders 84 , which are symmetrically arranged with the axis of the detection member 41 as the center.

[0143] In summary, the control network layout method of the present invention is flexible and versatile. After the hole beam is connected, it is not affected by ground conditions. Only points are made on the prefabricated hole beam, and the control network can be laid out and observed quickly and effectively. It solves the problem of the existing control network layout method that the operator's line of sight is easily blocked due to the proximity to the double side walls of the hole beam. It is also not affected by side refraction, and the work efficiency is improved by 30% compared with the traditional double-conductor line. In the case of not reserving the measurement time of CPI control point 2 separately, the measurement time of CPI control point 2 and CPIII control point 3 of the entire tunnel is about 7 days, which provides a strong guarantee for the smooth progress of subsequent construction, saves manpower costs and resource costs for the project department, and has good economic benefits.

[0144] 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 scope of protection of the present invention.

Claims

1. A control network layout method for precise measurement of high-speed pipeline maglev train tracks, characterized in that: The steps include: S100, obtaining the number and location information of CPO control points that can cover the construction area; S200, formulating a layout plan for CPI control points within the construction area based on the acquired quantity information and location information of the CPO control points, determining the quantity information and location information of the CPI control points, ensuring that the distance between two adjacent CPI control points is greater than 300 m, and that the two adjacent CPI control points have line of sight with each other, to facilitate the layout of the CPIII level control network; S300: Determine the layout information of the CPIII control points according to the layout plan of the CPI control points, and determine the number and location information of the CPIII control points. At the pipeline inlet and outlet in the construction area, the total number of the CPI control points and the CPIII control points is not less than three; and the distance between two adjacent CPIII control points is 25m to 30m. S400, performing construction according to the arrangement plan of the CPI control points, pre-embedding CPI observation piers at the CPI control points; and performing construction according to the arrangement plan of the CPIII control points; S500 , re-measure the position information of the CP0 control point, the CPI control point, and the CPIII control point respectively.

2. The control network layout method for accurate measurement of high-speed pipeline maglev train track according to claim 1 is characterized in that: In the step S300 , the CPIII control point is located at a fixed end of a hole beam support, and a distance between the CPIII control point and an inner edge of the hole beam is 12 cm to 16 cm.

3. The control network layout method for accurate measurement of high-speed pipeline maglev train track according to claim 1 is characterized in that: The S400 specifically further includes: S410, searching and determining the position of the CPIII control point; S420: embed a detection component at the CPIII control point.

4. The control network layout method for accurate measurement of high-speed pipeline maglev train track according to claim 3 is characterized in that: The detection component includes an embedded part buried in the CPIII control point and a detection part plugged into the embedded part. The embedded part is provided with a detection groove along the axial direction. The detection part is plugged into the detection groove, and a clearance hole is also provided at the bottom of the detection part.

5. The control network layout method for accurate measurement of high-speed pipeline maglev train track according to claim 4 is characterized in that: The detection member is provided with a ventilation groove which passes through the upper and lower parts along the axial direction, and a ventilation space is formed between the ventilation groove and the detection groove.

6. The control network layout method for accurate measurement of high-speed pipeline maglev train tracks according to claim 5 is characterized in that: The detection assembly also includes a clamping mechanism for connecting the detection part and the embedded part, the clamping mechanism includes a first clamping module provided on the detection part, and a second clamping module provided in the detection groove, the first clamping module and the second clamping module are clamped together.

7. The control network layout method for accurate measurement of high-speed pipeline maglev train track according to claim 6, characterized in that: The second card connection module includes an insert block provided at the bottom of the detection slot, and a card slot is provided on the outer peripheral surface of the insert block; the first card connection module includes: A mounting block is provided at the bottom of the detection member, wherein the bottom of the mounting block is provided with a slot for plugging into the plug block, and an inner wall of the slot is provided with a mounting groove in a radial direction; and An elastic clamping piece is arranged in the installation slot, and the elastic clamping piece can be expanded and contracted along the radial direction of the slot, and is used for clamping with the clamping slot.

8. The control network layout method for accurate measurement of high-speed pipeline maglev train track according to claim 7, characterized in that: The mounting slot includes a slot body and a limiting protrusion located at an open end of the slot body, and the elastic clamp includes: A clamping ball is provided in the groove body, the outer end surface of the clamping ball protrudes outward from the groove body, and the limiting protrusion is used to limit the clamping ball in the groove body; and The first elastic member is disposed in the groove body, and the first elastic member is configured to have a pre-tightening force that causes the locking ball to abut against the limiting protrusion.

9. The control network layout method for accurate measurement of high-speed pipeline maglev train tracks according to claim 8, characterized in that: The first card connection module includes: a fixed block disposed at the bottom of the detection member, wherein the bottom of the fixed block is provided with a locking groove along its own axial direction, and the fixed block is provided with a sliding groove along a first direction, the first direction being perpendicular to the axis of the fixed block, and the sliding groove is connected to the locking groove; a slider slidably disposed in the slide groove, wherein the free end of the slider has an inclined guide surface; and a second elastic member disposed in the slide groove, and the second elastic member is configured with a pre-tightening force to cause the slider to slide into the locking groove; The second card connection module includes: A fastening block, provided at the bottom of the detection slot and used for plugging into the locking slot; a connecting piece, provided on the top of the fastening block; A first locking block is slidably sleeved on the outside of the connecting member, and the outer circumference of the first locking block gradually decreases from top to bottom; and a second locking block, disposed on the top of the connecting member, wherein the outer circumference of the second locking block gradually increases from top to bottom, and the outer circumference of the connecting member is concave inwardly of the first locking block and the second locking block; The slider has a locked state in which it is inserted between the first locking block and the second locking block; a switching state in which it is inserted between the fastening block and the first locking block; and an unlocked state in which it is separated from the first locking block, the second locking block and the fastening block.

10. The control network layout method for accurate measurement of high-speed pipeline maglev train tracks according to claim 9, characterized in that: A plurality of sliding grooves are provided around the axis of the fixed block, and the sliding block and the second elastic member are correspondingly provided in each sliding groove.

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