A positioning method and system for a super-large-diameter shaft portal

Abstract

The application discloses a positioning method and system for a super-large-diameter shaft portal, and the method comprises the following steps: establishing a lofting coordinate system and a local coordinate system required for portal positioning, and determining the local coordinates of a shield tunnel portal of a shaft project and a shaft junction point; converting the local coordinates of all monitoring control points into the lofting coordinates according to a coordinate conversion formula; inputting the lofting coordinates of the two acquired point positions after the shaft is excavated to the shield tunnel portal excavation height; and using a total station laser to hit the two points, so that the total station internally simulates and constructs the established lofting coordinate system; and finally, according to the construction sequence of the shaft layer-by-layer excavation, the exposed monitoring control points on the shield tunnel portal section are lofted every time a layer is excavated downwards, until the shaft portal positioning is completed. The portal positioning efficiency is improved, and the portal positioning precision reaches the design and construction requirements.

Description

Technical Field

[0001] This invention belongs to the field of deep vertical shaft construction technology, and particularly relates to a positioning method and system for ultra-large diameter vertical shaft portals. Background Technology

[0002] Vertical shaft shield tunnel portal positioning refers to accurately determining the position of the shield machine portal before shield tunnel excavation begins within the vertical shaft. Currently, traditional positioning methods primarily rely on manual measurement and drawing, with operators using blueprints and on-site markers for positioning. This method suffers from human error, low efficiency, and dependence on on-site construction experience, making it unsuitable for large-scale, high-efficiency vertical shaft tunnel portal positioning.

[0003] To address the aforementioned issues, modern vertical tunnel portal positioning utilizes more advanced technologies, including laser ranging, GNSS, and total stations. Laser ranging is typically used for rapid measurement of tunnel portal positions, but its accuracy is limited. GNSS technology determines location by receiving satellite signals, but signal attenuation is severe in the deep underground environment of vertical shaft excavations. Total stations can achieve high-precision three-dimensional measurements, but their application in vertical shafts is still somewhat limited. When using total stations for tunnel portal positioning, the complex and varied shapes of tunnel portals, with their curves located in different planes perpendicular to the tunnel's direction and at different angles to the horizontal, necessitate multiple tedious mathematical calculations during portal layout. This not only increases workload and reduces portal positioning efficiency but also fails to meet design and construction requirements in terms of positioning accuracy. Summary of the Invention

[0004] This invention provides a positioning method and system for ultra-large diameter vertical shaft portals, which solves the technical problem that when laying out portals, multiple tedious mathematical formula derivations and calculations are required, which not only reduces the positioning efficiency of portals but also fails to meet the design and construction requirements for portal positioning accuracy.

[0005] In a first aspect, the present invention provides a method for positioning an ultra-large diameter vertical shaft portal, comprising:

[0006] A local coordinate system is constructed based on the specific location of the shield tunnel. The local coordinate system follows the left-hand rule, and the x-axis of the local coordinate system is consistent with or parallel to a certain axis of the local project.

[0007] After the vertical shaft is excavated in layers to the excavation height of the shield tunnel portal, the first true relative distance between the origin of the local coordinate system and the first target point, and the second true relative distance between the origin of the coordinate system and the second target point are obtained based on the preset laser ranging rules. The first target point and the second target point are any points in the vertical shaft except for the shield tunnel portal.

[0008] Based on the first local coordinates of the first target point in the local coordinate system and the second local coordinates of the second target point in the local coordinate system, calculate the first relative distance between the origin of the coordinate system and the first target point and the second relative distance between the origin of the coordinate system and the second target point, respectively.

[0009] The first measured relative distance is subtracted from the first true relative distance, and the second measured relative distance is subtracted from the second true relative distance, respectively, to obtain the first distance difference value corresponding to the first target point and the second distance difference value corresponding to the second target point;

[0010] The first local coordinates and the second local coordinates are corrected based on the first distance difference and the second distance difference, respectively, to obtain the final first target local coordinates and the second target local coordinates;

[0011] According to the preset coordinate transformation rules, the local coordinates of the first target and the local coordinates of the second target are converted into lofting coordinate information, and a lofting coordinate system for portal positioning is constructed based on the lofting coordinate information.

[0012] According to the construction sequence of layered excavation of the vertical shaft, the monitoring and control points set on the exposed shield tunnel portal section of each layer are laid out according to the layout coordinate system until the vertical shaft is excavated to the bottom of the foundation pit, and the vertical shaft portal positioning is completed.

[0013] Secondly, the present invention provides a positioning system for an ultra-large diameter vertical shaft portal, comprising:

[0014] The first construction module is configured to construct a local coordinate system based on the specific location of the shield tunnel. The local coordinate system follows the left-hand rule, and the x-axis of the local coordinate system is consistent with or parallel to a certain axis of the local project.

[0015] The acquisition module is configured to, after the vertical shaft is excavated in layers to the excavation height of the shield tunnel portal, acquire, based on a preset laser ranging rule, the first true relative distance between the origin of the local coordinate system and the first target point, and the second true relative distance between the origin of the coordinate system and the second target point, wherein the first target point and the second target point are any points in the vertical shaft other than the shield tunnel portal;

[0016] The calculation module is configured to calculate, based on the first local coordinates of the first target point in the local coordinate system and the second local coordinates of the second target point in the local coordinate system, a first measured relative distance between the coordinate origin and the first target point and a second measured relative distance between the coordinate origin and the second target point, respectively.

[0017] The determination module is configured to calculate the difference between the first measured relative distance and the first true relative distance, and the difference between the second measured relative distance and the second true relative distance, respectively, to obtain a first distance difference value corresponding to the first target point and a second distance difference value corresponding to the second target point;

[0018] The correction module is configured to correct the first local coordinates and the second local coordinates based on the first distance difference and the second distance difference, respectively, to obtain the final first target local coordinates and the second target local coordinates;

[0019] The conversion module is configured to convert the local coordinates of the first target and the local coordinates of the second target into lofting coordinate information according to a preset coordinate conversion rule, and to construct a lofting coordinate system for portal positioning based on the lofting coordinate information.

[0020] The layout module is configured to lay out the monitoring and control points set on the exposed shield tunnel portal section of each layer according to the construction sequence of the vertical shaft layer excavation and the layout coordinate system, until the vertical shaft is excavated to the bottom of the foundation pit, and then the vertical shaft portal is positioned.

[0021] Thirdly, an electronic device is provided, comprising: at least one processor, and a memory communicatively connected to the at least one processor, wherein the memory stores instructions executable by the at least one processor, the instructions being executed by the at least one processor to enable the at least one processor to perform the steps of the positioning method for an ultra-large diameter vertical shaft portal according to any embodiment of the present invention.

[0022] Fourthly, the present invention also provides a computer-readable storage medium having a computer program stored thereon, wherein when the program instructions are executed by a processor, the processor performs the steps of the positioning method for an ultra-large diameter vertical shaft portal according to any embodiment of the present invention.

[0023] The positioning method and system for ultra-large diameter vertical shaft portals disclosed in this application establishes a layout coordinate system and a local coordinate system required for portal positioning, and determines the local coordinates of the junction point between the shield tunnel portal and the vertical shaft. The local coordinates of all monitoring and control points are converted to layout coordinates using a coordinate transformation formula. Then, any two points other than the shield tunnel portal are selected within the vertical shaft, and a sensor suitable for the vertical shaft environment is installed at each of these two points. The layout coordinates of these two points are calculated. After the vertical shaft is excavated layer by layer to the excavation height of the shield tunnel portal, the obtained layout coordinates of the two points are input. A total station laser is then used to illuminate these two points, allowing the total station to internally simulate and construct the established layout coordinate system. Finally, following the construction sequence of layered excavation of the vertical shaft, the monitoring and control points on the exposed shield tunnel portal section are laid out for each layer excavated downwards until the vertical shaft is excavated to the bottom of the pit, thus completing the positioning of the vertical shaft portal. Attached Figure Description

[0024] To more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the following description of the embodiments will be briefly introduced. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0025] Figure 1 A flowchart illustrating a method for positioning an ultra-large diameter vertical shaft portal according to an embodiment of the present invention;

[0026] Figure 2 One embodiment of the invention provides a schematic diagram of the xoy plane coordinate system for laying out an ultra-large diameter vertical shaft portal according to a specific embodiment;

[0027] Figure 3 One embodiment of the invention provides a schematic diagram of the yoz plane coordinate system for laying out an ultra-large diameter vertical shaft portal according to a specific embodiment;

[0028] Figure 4 One embodiment of the invention provides a schematic diagram of the coordinate transformation rules of a specific embodiment;

[0029] Figure 5 A schematic diagram of layered excavation of a vertical shaft is provided in a specific embodiment of the present invention;

[0030] Figure 6 A schematic diagram of the layout of monitoring and control points for the portal of a vertical shaft shield tunnel provided in a specific embodiment of the present invention;

[0031] Figure 7 This is a structural block diagram of a positioning system for an ultra-large diameter vertical shaft portal provided in an embodiment of the present invention;

[0032] Figure 8 This is a schematic diagram of the structure of an electronic device provided in an embodiment of the present invention.

[0033] In the diagram: 1. Shaft; 2. Shield tunnel portal; 3. Pit bottom; 4. Shield tunnel. Detailed Implementation

[0034] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0035] Please see Figure 1 The diagram shows a flowchart of a positioning method for an ultra-large diameter vertical shaft portal according to this application.

[0036] like Figure 1 As shown, the positioning method for ultra-large diameter vertical shaft portals specifically includes the following steps:

[0037] Step S101: Construct a local coordinate system based on the specific location of the shield tunnel. The local coordinate system follows the left-hand rule, and the x-axis of the local coordinate system is consistent with or parallel to a certain axis of the local project.

[0038] Step S102: After the vertical shaft is excavated in layers to the excavation height of the shield tunnel portal, the first true relative distance between the origin of the local coordinate system and the first target point, and the second true relative distance between the origin of the coordinate system and the second target point are obtained based on the preset laser ranging rules. The first target point and the second target point are any points in the vertical shaft other than the shield tunnel portal.

[0039] In this step, a laser signal is emitted from the origin towards the first target point, and the emission time data of the laser signal is recorded. The laser signal is modulated based on a modulation signal. The return signal after the laser signal hits the target at the first target point is received. Photon detection is performed on the return signal, and the arrival time data of multiple photons is recorded. At least one first true relative distance between the origin and the first target point is calculated based on the arrival time data and emission data of multiple photons. Similarly, at least two first true relative distances between the origin and the second target point can be calculated.

[0040] Step S103: Based on the first local coordinates of the first target point in the local coordinate system and the second local coordinates of the second target point in the local coordinate system, calculate the first measured relative distance between the coordinate origin and the first target point and the second measured relative distance between the coordinate origin and the second target point.

[0041] Step S104: Subtract the first measured relative distance from the first true relative distance and the second measured relative distance from the second true relative distance to obtain the first distance difference value corresponding to the first target point and the second distance difference value corresponding to the second target point.

[0042] In this step, the first measured relative distance is subtracted from at least one first true relative distance to obtain at least one first distance difference value corresponding to the first target point. The smallest first distance difference value is selected from these at least one first distance difference values ​​as the final first distance difference value corresponding to the first target point. Similarly, the final second distance difference value corresponding to the second target point can be obtained.

[0043] Step S105: Correct the first local coordinates and the second local coordinates according to the first distance difference and the second distance difference respectively to obtain the final first target local coordinates and the second target local coordinates.

[0044] In this step, the direction of the first target point relative to the origin is determined, including a first direction from the origin to the first target point and a second direction from the first target point to the origin. The magnitude of the first distance difference is checked to see if it is less than zero. If it is less than zero, a line is drawn in the local coordinate system along the second direction, starting from the origin, to obtain the target line segment. This target line segment is then orthogonally decomposed to obtain the local coordinates of its endpoint. If the difference is not less than zero, a line is drawn in the local coordinate system along the first direction, starting from the origin, to obtain the target line segment. This target line segment is then orthogonally decomposed to obtain the local coordinates of its endpoint. The local coordinates of the endpoint are added to the first local coordinates to obtain the final local coordinates of the first target. Similarly, the final local coordinates of the second target can be obtained.

[0045] Step S106: Convert the local coordinates of the first target and the local coordinates of the second target into lofting coordinate information according to the preset coordinate transformation rules, and construct a lofting coordinate system for portal positioning based on the lofting coordinate information.

[0046] In this step, the layout coordinate system takes the center point of the bottom of the shaft pit as its origin. Assume the layout coordinates of the center point of the large shaft pit bottom are (Ox, Oy, Oz), as follows: Figure 2 and Figure 3As shown. Because there is an angular deviation between the direction of the shield tunnel and the coordinate axes of the layout coordinate system, a local coordinate system is established based on the specific location of the shield tunnel. The established local coordinate system follows the left-hand rule, and the x-axis is consistent with or parallel to a certain important axis of the local project.

[0047] To facilitate the positioning and measurement of the shaft entrance, a corresponding construction coordinate system is established based on the specific project. This construction coordinate system, also known as the local coordinate system, follows the left-hand rule, and its x-axis is usually aligned with or parallel to a significant axis of the local project. The relationship between the survey coordinate system and the construction (local) coordinate system is as follows: Figure 4 As shown, the expression for the coordinate transformation rule is:

[0048] x p =x0+x′ p cosα+y′ p sinα,

[0049] y p =y0-x p sinα+y p cosα,

[0050] In the formula, x p y p Let x and y be the x and y coordinates of point p in the global coordinate system, respectively, and x0 and y0 be the x and y coordinates of the origin in the local coordinate system in the global coordinate system. p y p Let x and y be the x and y coordinates of point p in the local coordinate system, and α be the clockwise rotation angle between the local and global coordinate systems.

[0051] It should be noted that, firstly, the coordinates of the intersection point between the shield tunnel and the shaft are determined. A control point is set every 20cm along the shaft portal ring, and reflective sheets are placed on the control points. Then, a total station is used to measure the local coordinates of each control point. The converted coordinates are then compared with the design data to ensure the accurate positioning of the shaft portal. Finally, the converted global coordinates are input into the CAD design drawings for parameter correction.

[0052] In summary, the method in this embodiment, by constructing coordinate transformation rules, can effectively reduce the increase in detection time caused by conventional positioning construction. It reduces the operational difficulty of similar engineering procedures, improves the accuracy of engineering operations, avoids processing needs during the operation, and shortens the construction period to a certain extent.

[0053] Step S107: According to the construction sequence of layered excavation of the vertical shaft, the monitoring and control points set on the exposed shield tunnel portal section of each layer are laid out according to the layout coordinate system until the vertical shaft is excavated to the bottom of the foundation pit, and the vertical shaft portal positioning is completed.

[0054] In this step, such as Figure 5 As shown, for each layer excavated downwards in the shaft, the exposed tunnel portal was laid out. A total of seven layers were excavated, and seven laying-out operations were conducted. Figure 6 As shown, the positioning of the tunnel portal in the vertical shaft is divided into 7 layers. The first layer has 37 monitoring control points, numbered 1-1 to 1-37; the second layer has 18 monitoring control points, numbered 2-1 to 2-18; the third layer has 14 monitoring control points, numbered 3-1 to 3-14; the fourth layer has 14 monitoring control points, numbered 4-1 to 4-14; the fifth layer has 14 monitoring control points, numbered 5-1 to 5-14; the sixth layer has 18 monitoring control points, numbered 6-1 to 6-18; and the seventh layer has 38 monitoring control points, numbered 7-1 to 7-37, for a total of 152 monitoring control points.

[0055] In summary, the method of this application establishes the layout coordinate system and local coordinate system required for the portal positioning, and determines the local coordinates of the junction point between the shield tunnel portal and the shaft in the corresponding vertical shaft project. The local coordinates of all monitoring and control points are converted to layout coordinates using the coordinate transformation formula. Then, any two points other than the shield tunnel portal are selected in the shaft, and a sensor suitable for the shaft environment is set at each of these two points. The layout coordinates of these two points are calculated. After the shaft is excavated layer by layer to the shield tunnel portal excavation height, the obtained layout coordinates of the two points are input, and a total station laser is used to illuminate these two points, allowing the total station to simulate and construct the established layout coordinate system. Finally, following the construction sequence of layered excavation of the shaft, the monitoring and control points set on the exposed shield tunnel portal section are laid out for each layer excavated downwards until the shaft is excavated to the bottom of the pit, thus completing the shaft portal positioning.

[0056] In one specific embodiment, a method for locating an ultra-large diameter vertical shaft portal includes the following steps:

[0057] Step 1: Establish the layout coordinate system required for the portal positioning.

[0058] Step 2: Determine the local coordinates of the intersection point between the tunnel portal 2 and shaft 1 of the corresponding vertical shaft project shield tunnel.

[0059] Step 3: Convert all local coordinates of the monitoring control points into stakeout coordinates according to the coordinate transformation formula.

[0060] Step 4: Select any two points in shaft 1, excluding the tunnel portal 2, and set up a sensor suitable for the shaft environment at each of these two points. At the same time, calculate the layout coordinates of these two points.

[0061] Step 5: After the vertical shaft 1 is excavated in layers to the excavation height of the shield tunnel portal 2, input the layout coordinates of the two points obtained in step 4, and then use the total station laser to shoot towards these two points, so that the layout coordinate system established in step 1 can be simulated and constructed inside the total station.

[0062] Step 6: Following the construction sequence of layered excavation of shaft 1, each time a layer is excavated downwards, the monitoring and control points set up on the exposed shield tunnel portal section 2 are laid out until the shaft is excavated to the bottom of the foundation pit 3, and the shaft portal positioning is completed.

[0063] Please see Figure 7 The diagram shows a structural block diagram of a positioning system for an ultra-large diameter vertical shaft portal according to this application.

[0064] like Figure 7 As shown, the positioning system 200 for the ultra-large diameter vertical shaft portal includes a first construction module 210, an acquisition module 220, a calculation module 230, a determination module 240, a correction module 250, a conversion module 260, and a layout module 270.

[0065] The first construction module 210 is configured to construct a local coordinate system based on the specific orientation of the shield tunnel. This local coordinate system follows the left-hand rule, and its x-axis is aligned with or parallel to a certain axis of the local engineering project. The acquisition module 220 is configured to, after the vertical shaft is excavated layer by layer to the shield tunnel portal excavation height, acquire, based on a preset laser ranging rule, the first true relative distance between the origin of the local coordinate system and the first target point, and the second true relative distance between the origin of the local coordinate system and the second target point. The first and second target points are any points in the vertical shaft other than the shield tunnel portal. The calculation module 230 is configured to, based on the first local coordinates of the first target point in the local coordinate system and the second local coordinates of the second target point in the local coordinate system, calculate the first measured relative distance between the origin of the local coordinate system and the first target point, and the second measured relative distance between the origin of the local coordinate system and the second target point, respectively. The module is further configured to determine the... Block 240 is configured to subtract the first measured relative distance from the first actual relative distance and the second measured relative distance from the second actual relative distance, respectively, to obtain a first distance difference value corresponding to the first target point and a second distance difference value corresponding to the second target point; Correction module 250 is configured to correct the first local coordinates and the second local coordinates according to the first distance difference value and the second distance difference value, respectively, to obtain the final first target local coordinates and the second target local coordinates; Conversion module 260 is configured to convert the first target local coordinates and the second target local coordinates into layout coordinate information according to a preset coordinate conversion rule, and construct a layout coordinate system for portal positioning based on the layout coordinate information; Layout module 270 is configured to lay out the monitoring and control points set on the exposed shield tunnel portal section of each layer according to the construction sequence of the vertical shaft layer excavation, based on the layout coordinate system, until the vertical shaft is excavated to the bottom of the foundation pit, thus completing the vertical shaft portal positioning.

[0066] It should be understood that Figure 7 The modules and references described in the document Figure 1 The steps described in the text correspond to those in the method described above. Therefore, the operations, features, and corresponding technical effects described above also apply to the method described in the text. Figure 7 The various modules in the document will not be described in detail here.

[0067] In other embodiments, the present invention also provides a computer-readable storage medium having a computer program stored thereon, wherein when the program instructions are executed by a processor, the processor performs the positioning method for the ultra-large diameter vertical shaft entrance in any of the above method embodiments.

[0068] In one embodiment, the computer-readable storage medium of the present invention stores computer-executable instructions, which are configured as follows:

[0069] A local coordinate system is constructed based on the specific location of the shield tunnel. The local coordinate system follows the left-hand rule, and the x-axis of the local coordinate system is consistent with or parallel to a certain axis of the local project.

[0070] After the vertical shaft is excavated in layers to the excavation height of the shield tunnel portal, the first true relative distance between the origin of the local coordinate system and the first target point, and the second true relative distance between the origin of the coordinate system and the second target point are obtained based on the preset laser ranging rules. The first target point and the second target point are any points in the vertical shaft except for the shield tunnel portal.

[0071] Based on the first local coordinates of the first target point in the local coordinate system and the second local coordinates of the second target point in the local coordinate system, calculate the first relative distance between the origin of the coordinate system and the first target point and the second relative distance between the origin of the coordinate system and the second target point, respectively.

[0072] The first measured relative distance is subtracted from the first true relative distance, and the second measured relative distance is subtracted from the second true relative distance, respectively, to obtain the first distance difference value corresponding to the first target point and the second distance difference value corresponding to the second target point;

[0073] The first local coordinates and the second local coordinates are corrected based on the first distance difference and the second distance difference, respectively, to obtain the final first target local coordinates and the second target local coordinates;

[0074] According to the preset coordinate transformation rules, the local coordinates of the first target and the local coordinates of the second target are converted into lofting coordinate information, and a lofting coordinate system for portal positioning is constructed based on the lofting coordinate information.

[0075] According to the construction sequence of layered excavation of the vertical shaft, the monitoring and control points set on the exposed shield tunnel portal section of each layer are laid out according to the layout coordinate system until the vertical shaft is excavated to the bottom of the foundation pit, and the vertical shaft portal positioning is completed.

[0076] Computer-readable storage media may include a stored program area and a stored data area, wherein the stored program area may store an operating system and an application program required for at least one function; the stored data area may store data created based on the use of the positioning system for the ultra-large diameter vertical shaft portal, etc. Furthermore, the computer-readable storage medium may include high-speed random access memory, and may also include memory, such as at least one disk storage device, flash memory device, or other non-volatile solid-state storage device. In some embodiments, the computer-readable storage medium may optionally include memory remotely located relative to a processor, and this remote memory may be connected to the positioning system for the ultra-large diameter vertical shaft portal via a network. Examples of such networks include, but are not limited to, the Internet, corporate intranets, local area networks, mobile communication networks, and combinations thereof.

[0077] Figure 8 This is a schematic diagram of the structure of the electronic device provided in the embodiment of the present invention, such as... Figure 8 As shown, the device includes a processor 310 and a memory 320. The electronic device may also include an input device 330 and an output device 340. The processor 310, memory 320, input device 330, and output device 340 can be connected via a bus or other means. Figure 8 Taking a bus connection as an example, the memory 320 is the computer-readable storage medium described above. The processor 310 executes various server functions and data processing by running non-volatile software programs, instructions, and modules stored in the memory 320, thereby implementing the positioning method for the ultra-large diameter vertical shaft door described in the above embodiment. The input device 330 can receive input digital or character information and generate key signal inputs related to user settings and function control of the positioning system for the ultra-large diameter vertical shaft door. The output device 340 may include a display screen or other display device.

[0078] The aforementioned electronic device can execute the method provided in the embodiments of the present invention, and has the corresponding functional modules and beneficial effects for executing the method. Technical details not described in detail in this embodiment can be found in the method provided in the embodiments of the present invention.

[0079] In one implementation, the above-described electronic device is applied to a positioning system for ultra-large diameter vertical shaft entrances, serving as a client, and includes: at least one processor; and a memory communicatively connected to the at least one processor; wherein the memory stores instructions executable by the at least one processor, the instructions being executed by the at least one processor to enable the at least one processor to:

[0080] A local coordinate system is constructed based on the specific location of the shield tunnel. The local coordinate system follows the left-hand rule, and the x-axis of the local coordinate system is consistent with or parallel to a certain axis of the local project.

[0081] After the vertical shaft is excavated in layers to the excavation height of the shield tunnel portal, the first true relative distance between the origin of the local coordinate system and the first target point, and the second true relative distance between the origin of the coordinate system and the second target point are obtained based on the preset laser ranging rules. The first target point and the second target point are any points in the vertical shaft except for the shield tunnel portal.

[0082] Based on the first local coordinates of the first target point in the local coordinate system and the second local coordinates of the second target point in the local coordinate system, calculate the first relative distance between the origin of the coordinate system and the first target point and the second relative distance between the origin of the coordinate system and the second target point, respectively.

[0083] The first measured relative distance is subtracted from the first true relative distance, and the second measured relative distance is subtracted from the second true relative distance, respectively, to obtain the first distance difference value corresponding to the first target point and the second distance difference value corresponding to the second target point;

[0084] The first local coordinates and the second local coordinates are corrected based on the first distance difference and the second distance difference, respectively, to obtain the final first target local coordinates and the second target local coordinates;

[0085] According to the preset coordinate transformation rules, the local coordinates of the first target and the local coordinates of the second target are converted into lofting coordinate information, and a lofting coordinate system for portal positioning is constructed based on the lofting coordinate information.

[0086] According to the construction sequence of layered excavation of the vertical shaft, the monitoring and control points set on the exposed shield tunnel portal section of each layer are laid out according to the layout coordinate system until the vertical shaft is excavated to the bottom of the foundation pit, and the vertical shaft portal positioning is completed.

[0087] Through the above description of the embodiments, those skilled in the art can clearly understand that each embodiment can be implemented by means of software plus necessary general-purpose hardware platforms, and of course, it can also be implemented by hardware. Based on this understanding, the above technical solutions, in essence or the part that contributes to the prior art, can be embodied in the form of a software product. This computer software product can be stored in a computer-readable storage medium, such as ROM / RAM, magnetic disk, optical disk, etc., including several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute the methods of various embodiments or some parts of embodiments.

[0088] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A method for positioning an ultra-large diameter vertical shaft portal, characterized in that, include: A local coordinate system is constructed based on the specific location of the shield tunnel. The local coordinate system follows the left-hand rule, and the x-axis of the local coordinate system is consistent with or parallel to a certain axis of the local project. After the vertical shaft is excavated in layers to the excavation height of the shield tunnel portal, the first true relative distance between the origin of the local coordinate system and the first target point, and the second true relative distance between the origin of the coordinate system and the second target point are obtained based on the preset laser ranging rules. The first target point and the second target point are any points in the vertical shaft except for the shield tunnel portal. Based on the first local coordinates of the first target point in the local coordinate system and the second local coordinates of the second target point in the local coordinate system, calculate the first relative distance between the origin of the coordinate system and the first target point and the second relative distance between the origin of the coordinate system and the second target point, respectively. The first measured relative distance is subtracted from the first true relative distance, and the second measured relative distance is subtracted from the second true relative distance, respectively, to obtain the first distance difference value corresponding to the first target point and the second distance difference value corresponding to the second target point; The first local coordinates and the second local coordinates are corrected based on the first distance difference and the second distance difference, respectively, to obtain the final first target local coordinates and the second target local coordinates; According to the preset coordinate transformation rules, the local coordinates of the first target and the local coordinates of the second target are converted into lofting coordinate information, and a lofting coordinate system for portal positioning is constructed based on the lofting coordinate information. According to the construction sequence of layered excavation of the vertical shaft, the monitoring and control points set on the exposed shield tunnel portal section of each layer are laid out according to the layout coordinate system until the vertical shaft is excavated to the bottom of the foundation pit, and the vertical shaft portal positioning is completed.

2. The positioning method for an ultra-large diameter vertical shaft portal according to claim 1, characterized in that, Based on preset laser ranging rules, the first true relative distance between the origin of the local coordinate system and the first target point is obtained, including: A laser signal is emitted from the origin of the coordinate system toward the first target point, and the emission time data of the laser signal is recorded. The laser signal is obtained by modulation based on a modulation signal. Receive the return signal after the laser signal hits the target at the first target point; The returned signal is subjected to photon detection, and the arrival time data of multiple photons are recorded; Calculate at least one first true relative distance between the origin of the coordinate system and the first target point based on the arrival time data and emission data of multiple photons.

3. The positioning method for an ultra-large diameter vertical shaft portal according to claim 2, characterized in that, The difference between the first measured relative distance and the first true relative distance is used to obtain the first distance difference value corresponding to the first target point, which includes: The difference between the first measured relative distance and the at least one first real relative distance is calculated to obtain at least one first distance difference value corresponding to the first target point; Among the at least one first distance difference, the smallest first distance difference is selected as the final first distance difference corresponding to the first target point.

4. The positioning method for an ultra-large diameter vertical shaft portal according to claim 1, characterized in that, The first local coordinates are corrected based on the first distance difference to obtain the final local coordinates of the first target, including: Determine the direction of the first target point relative to the origin of the coordinate system, wherein the direction includes a first direction from the origin of the coordinate system to the first target point and a second direction from the first target point to the origin of the coordinate system; Determine whether the value of the first distance difference is less than zero; If the value is less than zero, then a line is drawn in the local coordinate system along the second direction starting from the origin of the coordinate system to obtain the target line segment, and the target line segment is orthogonally decomposed to obtain the local coordinates of the endpoint of the target line segment; If it is not less than zero, then draw a line in the local coordinate system along the first direction with the origin of the coordinate system as the starting point to obtain the target line segment, and perform orthogonal decomposition on the target line segment to obtain the local coordinates of the endpoint of the target line segment; Add the local coordinates of the endpoint to the first local coordinates to obtain the final local coordinates of the first target.

5. The positioning method for an ultra-large diameter vertical shaft portal according to claim 1, characterized in that, The expression for the coordinate transformation rule is: x p = x0+ x' p cos α + y' p sin α, and p =y0-x′ p sinα+y′ p cosα, In the formula, x p y p Let x and y be the x and y coordinates of point p in the global coordinate system, respectively, and x0 and y0 be the x and y coordinates of the origin in the local coordinate system in the global coordinate system, respectively. p y′ p Let x and y be the x and y coordinates of point p in the local coordinate system, and α be the clockwise rotation angle between the local and global coordinate systems.

6. A positioning system for an ultra-large diameter vertical shaft portal, characterized in that, include: The first construction module is configured to construct a local coordinate system based on the specific location of the shield tunnel. The local coordinate system follows the left-hand rule, and the x-axis of the local coordinate system is consistent with or parallel to a certain axis of the local project. The acquisition module is configured to, after the vertical shaft is excavated in layers to the excavation height of the shield tunnel portal, acquire, based on a preset laser ranging rule, the first true relative distance between the origin of the local coordinate system and the first target point, and the second true relative distance between the origin of the coordinate system and the second target point, wherein the first target point and the second target point are any points in the vertical shaft other than the shield tunnel portal; The calculation module is configured to calculate, based on the first local coordinates of the first target point in the local coordinate system and the second local coordinates of the second target point in the local coordinate system, a first measured relative distance between the coordinate origin and the first target point and a second measured relative distance between the coordinate origin and the second target point, respectively. The determination module is configured to calculate the difference between the first measured relative distance and the first true relative distance, and the difference between the second measured relative distance and the second true relative distance, respectively, to obtain a first distance difference value corresponding to the first target point and a second distance difference value corresponding to the second target point; The correction module is configured to correct the first local coordinates and the second local coordinates based on the first distance difference and the second distance difference, respectively, to obtain the final first target local coordinates and the second target local coordinates; The conversion module is configured to convert the local coordinates of the first target and the local coordinates of the second target into lofting coordinate information according to a preset coordinate conversion rule, and to construct a lofting coordinate system for portal positioning based on the lofting coordinate information. The layout module is configured to lay out the monitoring and control points set on the exposed shield tunnel portal section of each layer according to the construction sequence of the vertical shaft layer excavation and the layout coordinate system, until the vertical shaft is excavated to the bottom of the foundation pit, and then the vertical shaft portal is positioned.

7. An electronic device, characterized in that, include: At least one processor, and a memory communicatively connected to the at least one processor, wherein the memory stores instructions executable by the at least one processor to enable the at least one processor to perform the method according to any one of claims 1 to 5.

8. A computer-readable storage medium having a computer program stored thereon, characterized in that, When the program is executed by the processor, it implements the method described in any one of claims 1 to 5.

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