Tunnel multi-interval through measurement method

Abstract

The invention relates to a tunnel multi-interval through measurement method, and relates to the technical field of rail transit engineering control measurement. Comprising ground control point measurement, shaft connection measurement and in-hole connection traverse measurement; two control points are arranged near the ground of each vertical shaft position, and GPS static measurement is carried out. Two steel wires are hung at the vertical shaft position, and ground data are transmitted to a control point in a hole according to the one-well orientation principle. Adjacent intervals are measured and adjusted in an attached wire mode. During multi-section interval construction, two-well orientation is adopted in sections in a traditional method, the farther the distance from the position of a middle hole is, the larger the angle deviation is, and tunnel penetration is affected. The measurement method is reasonable, high in measurement accuracy, high in operability and short in measurement period, and the influence of multi-interval penetration accuracy can be well overcome by adopting the combined route for each section.

Description

Technical Field

[0001] The present invention relates to the technical field of rail transit engineering control measurement, and in particular to a tunnel multi-section penetration measurement method. Background Art

[0002] During the construction of open-cut or dark-cut tunnels for rail transit, construction is carried out independently in separate working faces, which will cause errors when the working faces are connected. In order to ensure the accuracy of penetration and the subsequent construction of ancillary facilities, joint measurement and precise adjustment of control points of each working face are required. The traditional two-well directional principle conducts joint measurement of multiple openings, and the control network graphics are unstable, which will cause large connection errors after joint measurement of control points near the openings, affecting subsequent construction.

[0003] Therefore, how to provide a tunnel multi-section penetration measurement method has become a technical problem that technical personnel in this field urgently need to solve. Summary of the invention

[0004] In view of the shortcomings of the prior art, the purpose of the present invention is to provide a method for multi-section through-measurement of a tunnel, in which the coordinates and azimuth of the ground control points of each opening are transmitted to the tunnel respectively as the starting data for adjacent openings, so as to solve the problems raised in the above-mentioned background technology. The present invention is reasonable, the measurement data is accurate, and it is easy to operate and has strong practicality.

[0005] To achieve the above-mentioned purpose, the present invention provides a tunnel multi-section penetration measurement method, including: ground control point measurement, shaft connection measurement and in-tunnel joint wire measurement;

[0006] Ground Control Point Measurement:

[0007] (1) Design and re-measure the intersection control points CPI023, CPI024, CPI025, and CPI026;

[0008] (2) Layout of ground plane control network, with two ground densification points arranged near each wellhead; the ground densification points are JM3-1, JM3-2, JM7-1, JM7-2, JM11-1, and JM11-2; the control points near the shaft are re-surveyed using adjustment data;

[0009] (3) Data processing: For the baselines that have passed the inspection, select independent baselines to form a GPS baseline vector network and perform network adjustment calculations;

[0010] Shaft connection measurement:

[0011] Two steel wires are hung at each hole, and the positioning and direction transmission are carried out by measuring the connection triangle method based on the principle of well orientation;

[0012] (1) A total station was set up at the ground densification point JM3-1 at the top of the 3# vertical shaft; two steel wires were hung in parallel, reflective sheets were attached to the wellhead and the well bottom, and a plumb bob was hung at the lower end of the steel wire and immersed in an oil drum; the total station respectively observed the side length d and horizontal angle α from the ground densification point JM3-1 to the steel wire position L1 and the steel wire position L2;

[0013] (2) Set up an instrument at the starting point A1 in the bottom hole of the shaft to observe the side length d of the wire position L1 and the wire position L2. , and horizontal angle α , , use the connection triangle method to calculate the coordinates of the starting point A1 in the hole;

[0014] (3) A total station is set up at the starting point A1 in the bottom of the shaft to observe the wire position L1, the angle from the wire position L2 to the starting point A2 in the hole, and the distance from the starting point A1 in the hole to the starting point A2 in the hole to calculate the coordinates of the starting point A2 in the hole, thus completing the orientation of the shaft;

[0015] (4) Orientation is performed on the 7# vertical shaft and the 11# vertical shaft respectively, and the coordinates of the starting points A3, A4, A5 and A6 in the tunnel are calculated;

[0016] Measurement of the attached conductor in the hole:

[0017] (1) Measure the conductor from the 3# shaft to the 7# shaft, starting point A1 in the tunnel, starting point A2 in the tunnel, encrypted point C1 in the tunnel, encrypted point C2 in the tunnel, encrypted point C3 in the tunnel, encrypted point C4 in the tunnel, encrypted point C5 in the tunnel, encrypted point C6 in the tunnel, encrypted point C7 in the tunnel, encrypted point C8 in the tunnel, starting point A3 in the tunnel, starting point A4 in the tunnel;

[0018] (2) Measure the conductor from shaft 7# to shaft 11#, starting point A3 in the tunnel, starting point A4 in the tunnel, encrypted point C9 in the tunnel, encrypted point C10 in the tunnel, encrypted point C11 in the tunnel, encrypted point C12 in the tunnel, encrypted point C13 in the tunnel, encrypted point C14 in the tunnel, encrypted point C15 in the tunnel, encrypted point C16 in the tunnel, encrypted point C17 in the tunnel, encrypted point C18 in the tunnel, starting point A5 in the tunnel, and starting point A6 in the tunnel.

[0019] Furthermore, the ground plane control network adopts GPS static measurement; using the designed intersection control points CPI023, CPI024, CPI025, and CPI026, the ground density point JM3-1, ground density point JM3-2, ground density point JM7-1, ground density point JM7-2, ground density point JM11-1, and ground density point JM11-2 are measured according to the fourth grade of high-speed rail.

[0020] Furthermore, the adjustment in the ground control point measurement includes three-dimensional unconstrained adjustment and two-dimensional constrained adjustment, and the adjustment data adopts the double difference fixed solution of the baseline vector.

[0021] Furthermore, the 3# vertical shaft uses the ground densification points JM3-1 and JM3-2 to transfer coordinates through the two steel wires at the steel wire positions L1 and L2 to obtain the coordinates of the starting points A1 and A2 in the tunnel;

[0022] The 7# vertical shaft uses the ground densification points JM7-1 and JM7-2 to transfer coordinates through the two steel wires at the steel wire positions L3 and L4 to obtain the coordinates of the starting points A3 and A4 in the tunnel;

[0023] The 11# vertical shaft uses the ground densification points JM11-1 and JM11-2 to transfer coordinates through the two steel wires at the steel wire positions L5 and L6 to obtain the coordinates of the starting points A5 and A6 in the tunnel.

[0024] The beneficial effects of the present invention are:

[0025] The present invention provides a method for measuring the penetration of multiple sections in a tunnel, and adjusts the traditional two-well orientation principle. In the two-well orientation principle, a steel wire is hung at each wellhead. When multiple wellheads are used, each section of the wire is connected by points, and the geometric strength of the formed figure is weak. In the present invention, two steel wires are used to transmit the plane position at each opening, and an edge data is obtained by calculation in the tunnel, which can be used as the starting edge and has good graphic strength. The three openings of the present invention are only examples, and are also applicable to the joint measurement of multiple opening control networks. The edge connection method is used at each opening position, which improves the measurement accuracy and reduces the error caused by a single steel wire. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a schematic plan view of a tunnel multi-interval penetration measurement method of the present invention;

[0027] Figure 2 It is a schematic diagram of the conductor in the tunnel from the 3# vertical shaft to the 7# vertical shaft of a tunnel multi-section penetration measurement method of the present invention;

[0028] Figure 3 It is a schematic diagram of the conductor in the tunnel from the 7# vertical shaft to the 11# vertical shaft of a tunnel multi-section penetration measurement method of the present invention;

[0029] Figure 4 It is a schematic diagram of ground control network encryption of a tunnel multi-section penetration measurement method of the present invention;

[0030] Figure 5 A schematic diagram of the transfer of portal control points in a tunnel multi-interval penetration measurement method according to the present invention;

[0031] Figure 6 The present invention is a schematic diagram of the transmission of control points in a tunnel according to a method for multi-interval through-measurement of a tunnel.

[0032] Among them, 1-3# vertical shaft, 2-7# vertical shaft, 3-11# vertical shaft. DETAILED DESCRIPTION

[0033] The technical solutions in the embodiments of the present invention are described clearly and completely below. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0034] It should be noted that the terms "first", "second", etc. in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequential order. It should be understood that the data used in this way can be interchanged where appropriate, so that the embodiments of the present application described here. In addition, the terms "including" and "having" and any of their variations are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device comprising a series of steps or units is not necessarily limited to those steps or units clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0035] In the present application, the terms "upper", "lower", "left", "right", "front", "back", "top", "bottom", "inner", "outer", "middle", "vertical", "horizontal", "lateral", "longitudinal" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings. These terms are mainly used to better describe the present application and its embodiments, and are not used to limit the indicated devices, elements or components to have a specific orientation, or to be constructed and operated in a specific orientation.

[0036] In addition, some of the above terms may be used to express other meanings in addition to indicating orientation or positional relationship. For example, the term "on" may also be used to express a certain dependency or connection relationship in some cases. For those of ordinary skill in the art, the specific meanings of these terms in this application can be understood according to specific circumstances.

[0037] In addition, the terms "installed", "set", "provided with", "connected", "connected", and "socketed" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral structure; it can be a mechanical connection, or an electrical connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be an internal connection between two devices, elements, or components. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0038] To achieve the above purpose, Figure 1-3 As shown, the present invention provides a tunnel multi-section penetration measurement method, including: ground control point measurement, shaft connection measurement and in-tunnel joint wire measurement;

[0039] The present invention takes three vertical shaft joint measurement as an example and is also applicable to multiple vertical shaft joint measurement. Two through-sections include three vertical shafts: 3# vertical shaft 1, 7# vertical shaft 2, and 11# vertical shaft 3. The following steps are used to realize the joint measurement of control points in the tunnel:

[0040] Ground Control Point Measurement:

[0041] (1) Design and re-measure the intersection control points CPI023, CPI024, CPI025, and CPI026;

[0042] (2) Layout of ground plane control network, with two ground densification points arranged near each wellhead; the ground densification points are JM3-1, JM3-2, JM7-1, JM7-2, JM11-1, and JM11-2; the control points near the shaft are re-surveyed using adjustment data;

[0043] (3) Data processing is performed using the Kosa GPS adjustment software. For baselines that have passed the inspection, independent baselines are selected to form a GPS baseline vector network, and the network adjustment calculation is performed. The adjustment in ground control point measurement includes three-dimensional unconstrained adjustment and two-dimensional constrained adjustment, and the adjustment data uses the double-difference fixed solution of the baseline vector.

[0044] Take the encrypted data processing of the plane control network of the intercity connection line as an example:

[0045] ①Baseline solution

[0046] The CPI encrypted baseline vector solution uses broadcast ephemeris and Trimble Business Center (TBC) to solve the baseline double difference fixed solution in static relative positioning mode. After the baseline processing meets the specifications and software requirements, an "asc" suffix file is generated.

[0047] ② Repeat baseline and loop closure error test

[0048] Repeated baseline inspection: This control network encryption formed a total of 11 repeated baselines, and the repeated baselines were poor and met The maximum value of the repeated baseline length difference is shown in Table 1:

[0049]

[0050] Table 1

[0051] Independent loop inspection: This encryption formed a total of 21 independent loops, and the closure errors of each loop component met the tolerance requirements. The maximum closure error statistics of the independent loop are shown in Table 2:

[0052]

[0053] Table 2

[0054] ③ Three-dimensional unconstrained adjustment and accuracy analysis

[0055] First, a three-dimensional unconstrained adjustment is performed to verify the internal accuracy of the baseline vector network itself and its systematic errors and gross errors. In the WGS84Z coordinate system, the spatial three-dimensional free network adjustment of the GPS baseline vector network is performed with the GPS control point "JM7-1" as the reference, so as to obtain the three-dimensional spatial rectangular coordinates of each point in the second engineering independent coordinate system (WGS84 ellipsoid) after the free network adjustment. The baseline vector network of the control network has high internal accuracy, and the baseline vector has no obvious systematic errors and gross errors. The quality of the baseline vector network is reliable.

[0056] When all requirements meet the standards, the three-dimensional unconstrained adjustment of the GPS network is performed using the WGS-84 three-dimensional coordinates of the network point with the longest effective observation time in the entire network. Check the internal accuracy of the GPS baseline vector network itself. The accuracy statistics after the three-dimensional unconstrained adjustment calculation are shown in Table 3:

[0057]

[0058] Table 3

[0059] It can be seen from Table 3 above that the absolute value of the maximum value of the baseline vector residual of the encrypted three-dimensional unconstrained adjustment is 1cm≤limit error 1.77cm, and all baseline edges meet the accuracy requirement of baseline edge vector residual ≤3σ in the "High-speed Railway Engineering Survey Specification"; it has achieved a high internal accuracy, on this basis, two-dimensional constrained adjustment can be carried out.

[0060] ④ Two-dimensional constraint adjustment and accuracy analysis

[0061] After the plane dense constraint adjustment, the coordinates of each control point of the control network in the second engineering independent coordinate system (WGS84 ellipsoid) of the central meridian 116°18′00″ are obtained, and the accuracy of the point position and direction is evaluated. The accuracy of the two-dimensional constraint adjustment is shown in Table 4:

[0062]

[0063]

[0064] Table 4

[0065] It can be seen from Table 4 above that after the encrypted two-dimensional constrained adjustment, the accuracy of the weakest side is 1 / 182000, the maximum baseline azimuth mean error is 1", and the baseline side meets the accuracy requirements of the "High-speed Railway Engineering Survey Specification" that the relative mean error of the weakest side length is ≤1 / 100000 and the baseline azimuth mean error is ≤1.7". The above results show that the accuracy of the results of the encrypted re-survey control network is reliable and effective, and the constrained adjustment results meet the requirements of the specification.

[0066] Shaft connection measurement:

[0067] Two steel wires are hung at each hole, and the positioning and direction transmission are carried out by measuring the connection triangle method based on the principle of well orientation;

[0068] (1) A total station was set up at the ground densification point JM3-1 at the top of the 3# vertical shaft 1; two steel wires were hung in parallel, reflective sheets were attached to the wellhead and the well bottom, and a plumb bob was hung at the lower end of the steel wire and immersed in an oil drum; the total station respectively observed the side length d and horizontal angle α from the ground densification point JM3-1 to the steel wire position L1 and the steel wire position L2;

[0069] (2) Set up an instrument at the starting point A1 in the bottom hole of the shaft to observe the wire position L1, the side length d of the wire position L2, and the horizontal angle α, and use the connection triangle method to calculate the coordinates of the starting point A1 in the hole;

[0070] (3) A total station is set up at the starting point A1 in the bottom of the shaft to observe the wire position L1, the angle from the wire position L2 to the starting point A2 in the hole, and the distance from the starting point A1 in the hole to the starting point A2 in the hole to calculate the coordinates of the starting point A2 in the hole, thus completing the orientation of the shaft;

[0071] (4) Orientation is performed on shaft 7#2 and shaft 11#3 respectively, and the coordinates of the starting points A3, A4, A5 and A6 in the tunnel are calculated;

[0072] Measurement of the attached conductor in the hole:

[0073] (1) Measure the conductors from 3# shaft 1 to 7# shaft 2, starting point A1 in the tunnel, starting point A2 in the tunnel, encrypted point C1 in the tunnel, encrypted point C2 in the tunnel, encrypted point C3 in the tunnel, encrypted point C4 in the tunnel, encrypted point C5 in the tunnel, encrypted point C6 in the tunnel, encrypted point C7 in the tunnel, encrypted point C8 in the tunnel, starting point A3 in the tunnel, starting point A4 in the tunnel;

[0074] (2) Measure the conductors from 7# vertical shaft 2 to 11# vertical shaft 3, starting point A3 in the tunnel, starting point A4 in the tunnel, encrypted point C9 in the tunnel, encrypted point C10 in the tunnel, encrypted point C11 in the tunnel, encrypted point C12 in the tunnel, encrypted point C13 in the tunnel, encrypted point C14 in the tunnel, encrypted point C15 in the tunnel, encrypted point C16 in the tunnel, encrypted point C17 in the tunnel, encrypted point C18 in the tunnel, starting point A5 in the tunnel, and starting point A6 in the tunnel.

[0075] like Figure 4 As shown, the ground plane control network adopts GPS static measurement; the designed intersection control points CPI023, CPI024, CPI025, and CPI026 are used to perform dense measurement on the ground densification points JM3-1, JM3-2, JM7-1, JM7-2, JM11-1, and JM11-2 according to the fourth grade of high-speed rail. After the field measurement is completed, the adjustment calculation is performed in the office using the Kesha software, and the adjustment results are shown in Table 5:

[0076] dot number X coordinate Y coordinate Remark JM3-1 4372502.930 510363.084 Fourth Class JM3-2 4372696.127 510370.700 Fourth Class JM7-1 4370746.275 510897.801 Fourth Class JM7-2 4370856.178 510902.747 Fourth Class JM11-1 4368767.674 510537.238 Fourth Class JM11-2 4368651.738 510480.396 Fourth Class

[0077] Table 5

[0078] like Figure 5 As shown, each vertical shaft is measured using the one-well directional principle.

[0079] The 3# vertical shaft uses the ground densification points JM3-1 and JM3-2 to transfer coordinates through the two steel wires at the steel wire positions L1 and L2 to obtain the coordinates of the starting points A1 and A2 in the tunnel;

[0080] The 7# vertical shaft uses the ground densification points JM7-1 and JM7-2 to transfer coordinates through the two steel wires at the steel wire positions L3 and L4 to obtain the coordinates of the starting points A3 and A4 in the tunnel;

[0081] The 11# vertical shaft uses the ground densification points JM11-1 and JM11-2 to transfer coordinates through the two steel wires at the steel wire positions L5 and L6 to obtain the coordinates of the starting points A5 and A6 in the tunnel.

[0082] The calculated coordinates of the starting points A1, A2, A3, A4, A5 and A6 in the tunnel are shown in Table 6:

[0083] dot number X coordinate Y coordinate Remark A1 4372603.053 510376.666 Shaft transfer point A2 4732463.085 510430.12 Shaft transfer point A3 4370898.418 510895.374 Shaft transfer point A4 4370743.53 510909.292 Shaft transfer point A5 4368870.194 510619.413 Shaft transfer point A6 4368774.86 510545.916 Shaft transfer point

[0084] Table 6

[0085] like Figure 6 As shown, the conductors in the tunnel are measured using the attached conductor and rigorous adjustment method.

[0086] (1) Calculate the conductors of shaft 3# to shaft 7#: starting point A1 in the tunnel, starting point A2 in the tunnel, encrypted point C1 in the tunnel, encrypted point C2 in the tunnel, encrypted point C3 in the tunnel, encrypted point C4 in the tunnel, encrypted point C5 in the tunnel, encrypted point C6 in the tunnel, encrypted point C7 in the tunnel, encrypted point C8 in the tunnel, starting point A3 in the tunnel, starting point A4 in the tunnel. The results of the fourth-order strict adjustment are shown in Table 7:

[0087] Attached wire strict adjustment calculation table

[0088]

[0089] Table 7

[0090] (2) Calculate the conductor of shaft 7#-shaft 11#: starting point A3 in the tunnel, starting point A4 in the tunnel, encrypted point C9 in the tunnel, encrypted point C10 in the tunnel, encrypted point C11 in the tunnel, encrypted point C12 in the tunnel, encrypted point C13 in the tunnel, encrypted point C14 in the tunnel, encrypted point C15 in the tunnel, encrypted point C16 in the tunnel, encrypted point C17 in the tunnel, encrypted point C18 in the tunnel, starting point A5 in the tunnel, starting point A6 in the tunnel. The results of the fourth-order strict adjustment are shown in Table 8:

[0091] Attached wire strict adjustment calculation table

[0092]

[0093] Table 8

[0094] The present invention is applicable to the connection measurement after the simultaneous construction of multiple shafts, and has higher precision than the two-well measurement principle. If the two-well principle is used in sections, the common point of the middle hole is one or no common point, and the adjustment line is the starting point A1 in the hole, the starting point A2 in the hole, the encrypted point C1 in the hole, the encrypted point C2 in the hole, the encrypted point C3 in the hole, the encrypted point C4 in the hole, the encrypted point C5 in the hole, the encrypted point C6 in the hole, the encrypted point C7 in the hole, the encrypted point C8 in the hole, the starting point A3 in the hole, and the starting point A4 in the hole, the encrypted point C9 in the hole, the encrypted point C10 in the hole, the encrypted point C11 in the hole, the encrypted point C12 in the hole, the encrypted point C13 in the hole, the encrypted point C14 in the hole, the encrypted point C15 in the hole, the encrypted point C16 in the hole, the encrypted point C17 in the hole, the encrypted point C18 in the hole, the starting point A5 in the hole, and the starting point A6 in the hole, which will cause the farther the distance between the two sides of the middle hole, the greater the angle deviation. The method of the present invention uses two common points for adjustment at the middle opening, which can avoid such problems.

[0095] In addition, the present invention is also applicable to the connection measurement of unconnected sections of multiple vertical shafts.

[0096] The present invention provides a method for measuring the penetration of multiple sections of a tunnel, because the present invention adjusts the traditional two-well orientation principle. In the two-well orientation principle, a steel wire is hung at each wellhead. When multiple wellheads are used, each section of the wire is connected by points, and the geometric strength of the formed figure is weak. In the present invention, two steel wires are used to transmit the plane position at each opening, and an edge data is obtained by calculation in the tunnel, which can be used as the starting edge and has good graphic strength. The three openings of the present invention are only examples, and are also applicable to the joint measurement of multiple opening control networks. The edge connection method is used at each opening position, which improves the measurement accuracy and reduces the error caused by a single steel wire.

[0097] The method of the present invention requires the following matters:

[0098] First: When measuring each shaft connection, multiple measurements should be taken and the average value should be used for calculation.

[0099] Second: In order to improve the error in angle measurement and distance measurement, the instrument used is a 0.5" or 1" total station, and the back-and-forth method is adopted.

[0100] Third: In the above-mentioned well orientation of the present invention, two steel wires are hung in each vertical shaft.

[0101] Fourth: The number of encrypted points in the tunnel of the present invention is for illustration only, and the points are arranged specifically according to the length of the construction area.

[0102] The embodiment of the present invention provides a method for joint measurement of multi-interval working faces. After the accuracy of the ground control network meets the requirements, the section of the through part can be measured, the center line can be adjusted, the CPIII points can be measured and set, and auxiliary construction can be carried out, thereby effectively avoiding subsequent construction errors caused by the failure of joint measurement of each unit.

[0103] The above description is only a preferred embodiment of the present invention and does not limit the technical scope of the present invention. Therefore, any slight modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention are still within the scope of the technical solution of the present invention.

Claims

1. A tunnel multi-section penetration measurement method, characterized in that: include: Ground control point measurement, shaft connection measurement and in-hole joint wire measurement; Ground Control Point Measurement: (1) Design and re-measure the intersection control points CPI023, CPI024, CPI025, and CPI026; (2) Layout of ground plane control network, with two ground densification points arranged near each wellhead; the ground densification points are JM3-1, JM3-2, JM7-1, JM7-2, JM11-1, and JM11-2; the control points near the shaft are re-surveyed using adjustment data; (3) Data processing: For the baselines that have passed the inspection, select independent baselines to form a GPS baseline vector network and perform network adjustment calculations; Shaft connection measurement: Two steel wires are hung at each hole, and the positioning and direction transmission are carried out by measuring the connection triangle method based on the principle of well orientation; (1) A total station was set up at the ground densification point JM3-1 at the top of the 3# vertical shaft; two steel wires were hung in parallel, reflective sheets were attached to the wellhead and the well bottom, and a plumb bob was hung at the lower end of the steel wire and immersed in an oil drum; the total station respectively observed the side length d and horizontal angle α from the ground densification point JM3-1 to the steel wire position L1 and the steel wire position L2; (2) Set up an instrument at the starting point A1 in the bottom hole of the shaft to observe the side length d of the wire position L1 and the wire position L2. , and horizontal angle α , , use the connection triangle method to calculate the coordinates of the starting point A1 in the hole; (3) A total station is set up at the starting point A1 in the bottom of the shaft to observe the wire position L1, the angle from the wire position L2 to the starting point A2 in the hole, and the distance from the starting point A1 in the hole to the starting point A2 in the hole to calculate the coordinates of the starting point A2 in the hole, thus completing the orientation of the shaft; (4) Orientation is performed on the 7# vertical shaft and the 11# vertical shaft respectively, and the coordinates of the starting points A3, A4, A5 and A6 in the tunnel are calculated; Measurement of the attached conductor in the hole: (1) Measure the conductor from the 3# shaft to the 7# shaft, starting point A1 in the tunnel, starting point A2 in the tunnel, encrypted point C1 in the tunnel, encrypted point C2 in the tunnel, encrypted point C3 in the tunnel, encrypted point C4 in the tunnel, encrypted point C5 in the tunnel, encrypted point C6 in the tunnel, encrypted point C7 in the tunnel, encrypted point C8 in the tunnel, starting point A3 in the tunnel, starting point A4 in the tunnel; (2) Measure the conductor from shaft 7# to shaft 11#, starting point A3 in the tunnel, starting point A4 in the tunnel, encrypted point C9 in the tunnel, encrypted point C10 in the tunnel, encrypted point C11 in the tunnel, encrypted point C12 in the tunnel, encrypted point C13 in the tunnel, encrypted point C14 in the tunnel, encrypted point C15 in the tunnel, encrypted point C16 in the tunnel, encrypted point C17 in the tunnel, encrypted point C18 in the tunnel, starting point A5 in the tunnel, and starting point A6 in the tunnel.

2. A tunnel multi-section penetration measurement method as claimed in claim 1, characterized in that: The ground plane control network adopts GPS static measurement; using the designed intersection control points CPI023, CPI024, CPI025, and CPI026, the ground encryption points JM3-1, ground encryption point JM3-2, ground encryption point JM7-1, ground encryption point JM7-2, ground encryption point JM11-1, and ground encryption point JM11-2 are encrypted and measured according to the fourth grade of high-speed rail.

3. A tunnel multi-section penetration measurement method as claimed in claim 1, characterized in that: The adjustment in ground control point measurement includes three-dimensional unconstrained adjustment and two-dimensional constrained adjustment. The adjustment data adopts the double difference fixed solution of baseline vector.

4. A tunnel multi-section penetration measurement method as claimed in claim 1, characterized in that: The 3# vertical shaft uses the ground densification points JM3-1 and JM3-2 to transfer coordinates through the two steel wires at the steel wire positions L1 and L2 to obtain the coordinates of the starting points A1 and A2 in the tunnel; The 7# vertical shaft uses the ground densification points JM7-1 and JM7-2 to transfer coordinates through the two steel wires at the steel wire positions L3 and L4 to obtain the coordinates of the starting points A3 and A4 in the tunnel; The 11# vertical shaft uses the ground densification points JM11-1 and JM11-2 to transfer coordinates through the two steel wires at the steel wire positions L5 and L6 to obtain the coordinates of the starting points A5 and A6 in the tunnel.

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