In-tunnel plane control network partition sequential adjustment method before penetration of super-long tunnel
By measuring the gyro orientation edges in the cross wire network in the ultra-long tunnel hole in the ultra-long tunnel hole and participating in the adjustment, the attached cross wire network is formed, which solves the problem that the lateral penetration error of the ultra-long tunnel cannot be reduced in the prior art, and achieves higher precision in-hole plane control.
Patent Information
- Application Number
- CN202510083783.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-01-20
- Publication Date
- 2025-05-09
AI Technical Summary
The prior art cannot effectively utilize the azimuth angle measured by the gyroscope before the ultra-long tunnel is penetrated, resulting in the inability to reduce the lateral throughput error of the plane control network in the hole.
The sequential adjustment method of the in-hole plane control network before the super-long tunnel is passed through, and the gyro orientation edge is measured in segments in the cross wire network in the hole, and the adjustment is participated in the adjustment with the average value of the azimuth angle to form an attached cross wire network for constraint adjustment.
The distance of influence of errors in transverse penetration caused by angle measurement errors in the cross conductor network in the hole is effectively shortened, the adjustment accuracy of the plane control network in the hole is improved, and the lateral penetration error is reduced.
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Figure CN119958496A_ABST
Abstract
Description
Technical Field
[0001] The invention belongs to the technology of in-tunnel plane control network adjustment, and in particular relates to a method for sequential adjustment of in-tunnel plane control network by partition before an ultra-long tunnel is penetrated. Background Art
[0002] At present, in the plane control measurement of urban rail transit underground projects, super-long water diversion tunnels and long tunnels of railway systems, gyro total stations are often used to measure one or several gyro orientation edges in the plane control network in the tunnel. In this way, there are two types of azimuths for these directional edges in the tunnel, one is the coordinate azimuth calculated by the wire in the tunnel, and the other is the coordinate azimuth measured by the gyro total station. By comparing the two types of azimuths of the same directional edge, the purpose of checking the lateral swing of the plane control network in the tunnel can be achieved. However, the gyro azimuths measured in the tunnel are basically used to compare and check the lateral swing of the plane control network in the tunnel, and are not involved in the adjustment of the plane control network in the tunnel, so the purpose of reducing the lateral penetration error cannot be achieved. Summary of the invention
[0003] In order to solve the above problems and make the additional measured in-tunnel directional side gyro azimuth participate in the in-tunnel plane control network adjustment to reduce the lateral penetration error of the super-long tunnel, the present invention provides a method for sequential adjustment of the in-tunnel plane control network before the super-long tunnel is penetrated.
[0004] The invention discloses a method for sequential adjustment of the plane control network in a super-long tunnel before the tunnel is penetrated. The method measures gyroscopic orientation edges in sections or at equal intervals in the cross-conductor network in the super-long tunnel. A, B, P1, and P2 are GNSS plane control points near the tunnel entrance, and T11-T12, T21-T22, T31-T32, etc. are gyroscopic orientation edges measured in the tunnel. According to the distribution of the measured gyroscopic orientation edges, the plane control network in the tunnel from the tunnel entrance to the through-surface of the super-long tunnel is divided into the following sections: the first section is from the tunnel entrance to T11-T12, the second section is from T11-T12 to T21-T22, the third section is from T21-T22 to T31-T32, and the last section is from Ti1-Ti2 to the through-surface. Then, the section-wise sequential and rigorous adjustment of the cross-conductor network in the tunnel is performed according to the following steps.
[0005] Step 1: When adjusting the first section of the cross-wire network in the tunnel, first use the GNSS starting point coordinates outside the tunnel to perform the initial constraint adjustment of the first section of the cross-wire network in the tunnel to obtain the coordinate azimuth of the T11-T12 side; then calculate the average value T of the coordinate azimuth of the T11-T12 side and the gyro azimuth observation value of the side α1 ; Then use the azimuth of the starting side of the GNSS outside the cave and the average value of the azimuth of the side coordinates of T11~T12 and the gyro azimuth α1, forming the first section of the tunnel-attached cross-wire network; finally, the constrained adjustment of the first section of the tunnel-attached cross-wire network is carried out.
[0006] Step 2: When adjusting the cross-wire network in the second tunnel, first use the T11-T12 side to adjust the coordinate azimuth T of the cross-wire network in the previous tunnel. α1 and its coordinates, and the first constraint adjustment of the second section of the tunnel branch cross wire network is carried out to obtain the coordinate azimuth of the second oriented side T21~T22 calculated through the second section of the tunnel poor wire network, and then calculate the coordinate azimuth of the side T21~T22 and the average value of the gyro azimuth observation value of the side T α2 ; Then take the coordinate azimuth T of the T11~T12 side α1 and the azimuth angle T of the edge coordinates T21 to T22 α2 , forming the second section of the tunnel-attached cross-wire network; finally, constrained adjustment is performed on the second section of the tunnel-attached cross-wire network.
[0007] Step 3: The segmented constraint adjustment method for the third and subsequent segments of the in-tunnel cross-wire network is carried out in the same way until the last in-tunnel gyroscopic orientation edge.
[0008] Step 4: When adjusting the cross-wire network in the last tunnel, use the average value of the azimuth of the last gyro-oriented side obtained by the cross-wire network adjustment in the previous tunnel and the gyro azimuth of the side. αi , and the adjustment coordinates of the two end points of the last gyro orientation side obtained after the adjustment of the previous section of the cross-conductor network in the tunnel, the constrained adjustment of the last section of the branch cross-conductor network in the tunnel is carried out, so as to obtain the adjustment coordinates of the last section of the poorer wire network in the tunnel, including the coordinates of the through points on the through surface after the segmented measurement of the cross-conductor network in the tunnel in the direction of entering the tunnel and the sequential adjustment.
[0009] Furthermore, the lateral penetration error M on the cross section 1 caused by the angle and distance measurement errors of the first section of the tunnel cross wire network and the azimuth measurement error of the first gyro orientation edge in step 1 is y1 Estimate according to the following formula:
[0010]
[0011] Among them, M yβ1 is the horizontal penetration error on cross section 1 caused by the angle measurement error of the cross-wire network in the first tunnel, M yl1 is the lateral penetration error on cross section 1 caused by the azimuth measurement error of the gyro orientation edge in the first section of the tunnel, M Tl1 is the lateral penetration error on cross section 1 caused by the azimuth measurement error of the gyro orientation edge in the first section of the tunnel, which is calculated by the following formula:
[0012]
[0013] In the formula, m β1 is the mean error of the angle measurement of the cross-wire network in the first section of the tunnel, R x1 is the vertical distance from each point of the cross-conductor network in the first section of the tunnel to the cross section 1, l1 is the relative mean error of the side length of the cross-conductor network in the first section of the tunnel, m l1 is the distance measurement error of the first section of the cross-conductor network in the tunnel, d y1 is the projection length of each side of the cross-wire network in the first section of the tunnel on cross section 1, m T1 is the error in the azimuth measurement of the first gyro orientation edge, L1 is the length of the cross-wire network in the first section of the hole. ρ″ is a constant related to the conversion of angle error into radians, a conversion factor, and ρ is a constant related to the conversion of gyro orientation angle error into radians, a conversion factor.
[0014] Furthermore, in step 2, the lateral penetration error M on cross section 2 caused by the angle and distance measurement errors of the cross-wire network in the second tunnel and the azimuth measurement error of the second gyro orientation edge is y2 Estimate according to the following formula:
[0015]
[0016] Among them, M yβ2 is the lateral penetration error on cross section 2 caused by the angle measurement error of the cross-wire network in the second tunnel, M yl2 is the lateral penetration error on cross section 2 caused by the azimuth measurement error of the gyro orientation edge in the second section of the tunnel. The calculation method is the same as step 1; M Tl2 is the lateral penetration error on cross section 2 caused by the azimuth measurement error of the gyro orientation edge in the second section of the tunnel, which can be expressed by the formula calculate.
[0017] Furthermore, in step 3, the lateral penetration error M on the cross section 3 caused by the angle measurement and distance measurement errors of the third section of the tunnel cross wire network and the azimuth measurement errors of the third gyro orientation edge T31-T32 is y3 The estimation method is exactly the same as in the second paragraph.
[0018] Furthermore, in step 4, the cross-wire network in the hole between the last gyro orientation edge and the penetration surface is measured for angle and distance errors and the azimuth measurement error of the last gyro orientation edge, resulting in a lateral penetration error M on the penetration surface. yi The estimation method is as follows:
[0019]
[0020] Among them, M yβi and M yli The calculation method is the same as step 1; MTli Calculated by the following formula:
[0021]
[0022] Where Li is the length from the last gyro oriented edge to the through-plane.
[0023] Finally, the total transverse penetration error from the entrance to the penetration surface of the super-long tunnel is estimated according to the following formula:
[0024]
[0025] Assume that the total horizontal penetration error from the exit to the penetration surface of the super-long tunnel is estimated to be M y出 , M y出 The estimation method and M y进 The estimated value of the lateral penetration error of the super-long tunnel after taking into account the additional gyro azimuth of the conductor side should be:
[0026] The beneficial technical effects of the present invention are:
[0027] 1. The present invention effectively shortens the influence distance of the lateral penetration error caused by the angle measurement error of each measuring station in the cross-conductor network in the tunnel.
[0028] 2. The present invention not only takes into account the transmission error of the azimuth of the cross-conductor network in the tunnel, but also takes into account the observation error of the gyro azimuth of the gyro total station, and in a section of limited length (3-5 km), the error of the azimuth transmitted by the wire network in the tunnel through the side angle observation value is roughly equal to the observation error of the gyro azimuth, that is, the azimuth of the gyro orientation side participating in the adjustment is the average value of the wire azimuth and the gyro azimuth, so that the starting side azimuth value of the segmented constraint adjustment of the cross-conductor network in the tunnel of each section is more accurate.
[0029] 3. The present invention forms a segmented cross-conductor network in the tunnel for the first time and realizes the azimuth constraint adjustment at both ends. In the traditional method, the cross-conductor network in the tunnel is a branch network before the super-long tunnel is completed, and only the coordinates of the GNSS points of the tunnel entrance subnet are constrained to adjust the branch network.
[0030] In summary, the lateral penetration error on the penetration plane of the present invention will be much smaller than that of the traditional method. BRIEF DESCRIPTION OF THE DRAWINGS
[0031] Figure 1 The present invention is a schematic diagram of the segmented sequential adjustment method of the cross-conductor network after measuring a plurality of gyro-oriented edges in the tunnel. DETAILED DESCRIPTION
[0032] The present invention is further described in detail below with reference to the accompanying drawings and specific implementation methods.
[0033] The present invention provides a method for sequential adjustment of the plane control network in a super-long tunnel before the tunnel is completed. The gyroscopic orientation edges are measured in sections or at equal intervals (preferably 3 to 5 km) in the cross-conductor network in the super-long tunnel. Figure 1 The figure shows the cross-wire network and additional gyro-oriented edges in the tunnel from the entrance to the through-surface of the super-long tunnel, where A, B, P1, and P2 are GNSS plane control points near the entrance, and T11-T12, T21-T22, T31-T32, etc. are additional gyro-oriented edges in the tunnel. According to the distribution of additional gyro-oriented edges, the plane control network in the tunnel from the entrance to the through-surface of the super-long tunnel is divided into: the first section from the entrance to T11-T12, the second section from T11-T12 to T21-T22, the third section from T21-T22 to T31-T32, and the last section from Ti1-Ti2 to the through-surface. After the gyro orientation edges are measured in sections or at equal intervals in the in-tunnel cross-conductor network, the in-tunnel cross-conductor network from the tunnel entrance to the through-surface can be adjusted in sections, sequentially and rigorously according to the following steps, based on the tunnel excavation progress and the extension of the in-tunnel cross-conductor network toward the through-surface.
[0034] Step 1: When adjusting the first section of the cross-wire network in the tunnel, first use the GNSS starting point coordinates outside the tunnel to perform the initial constraint adjustment of the first section of the cross-wire network in the tunnel to obtain the coordinate azimuth of the T11-T12 side; then calculate the average value T of the coordinate azimuth of the T11-T12 side and the gyro azimuth observation value of the side α1 ; Then use the azimuth of the starting side of the GNSS outside the cave and the average value of the azimuth of the side coordinates of T11~T12 and the gyro azimuth α1 , forming the first section of the tunnel-attached cross-wire network; finally, the constrained adjustment of the first section of the tunnel-attached cross-wire network is carried out.
[0035] It should be noted that the first section is subject to the cross-wire network constraint adjustment. The entry section constrains the GNSS point coordinates of the tunnel subnet, while the cross section 1 end constrains the azimuth T of the T11-T12 side. α1 , thus obtaining the rigorous adjustment results of the cross-wire network in the first section of the tunnel.
[0036] Step 2: When adjusting the cross-wire network in the second tunnel, first use the T11-T12 side to adjust the coordinate azimuth T of the cross-wire network in the previous tunnel. α1 and its coordinates, and the first constraint adjustment of the second section of the tunnel branch cross wire network is carried out to obtain the coordinate azimuth of the second oriented side T21~T22 calculated through the second section of the tunnel poor wire network, and then calculate the coordinate azimuth of the side T21~T22 and the average value of the gyro azimuth observation value of the side T α2 ; Then take the coordinate azimuth T of the T11~T12 side α1and the azimuth angle T of the edge coordinates T21 to T22 α2 , forming the second section of the tunnel-attached cross-wire network; finally, constrained adjustment is performed on the second section of the tunnel-attached cross-wire network.
[0037] It is also necessary to explain that the second section is subject to the cross-wire network constraint adjustment. The constraints at the end of cross section 1 are the coordinates of points T11 and T12 after the cross-wire network adjustment in the first section, while the constraints at the end of cross section 2 are the azimuth T of the side T21-T22. α2 , thus obtaining the adjustment result of the cross-wire network in the second section of the tunnel.
[0038] Step 3: The segmented constraint adjustment method for the third and subsequent segments of the in-tunnel cross-wire network is carried out in the same way until the last in-tunnel gyroscopic orientation edge.
[0039] Step 4: When adjusting the last section of the cross-conductor network in the tunnel (i.e. the section from the last gyro-oriented side to the through-surface, this section of the cross-conductor network is the branch network), use the average value of the azimuth of the last gyro-oriented side obtained by the adjustment of the previous section of the cross-conductor network in the tunnel and the gyro azimuth of the side. αi , and the adjustment coordinates of the two end points of the last gyro orientation side obtained after the adjustment of the previous section of the cross-conductor network in the tunnel, the constrained adjustment of the last section of the branch cross-conductor network in the tunnel is carried out, so as to obtain the adjustment coordinates of the last section of the poorer wire network in the tunnel, including the coordinates of the through points on the through surface after the segmented measurement of the cross-conductor network in the tunnel in the direction of entering the tunnel and the sequential adjustment.
[0040] When gyro orientation edges are measured in sections or at equal intervals in the cross-conductor network in the super-long tunnel, and the section-by-section sequential rigorous adjustment of the cross-conductor network in the tunnel is performed according to the above method, the horizontal penetration error caused by the measurement error of the cross-conductor network in the tunnel from the tunnel entrance to the penetration surface and the gyro azimuth measurement error is calculated in step 1. The horizontal penetration error M caused by the angle and distance measurement error of the first section of the cross-conductor network in the tunnel and the azimuth measurement error of the first gyro orientation edge on the cross section 1 y1 Estimate according to the following formula:
[0041]
[0042] Among them, M yβ1 is the horizontal penetration error on cross section 1 caused by the angle measurement error of the cross-wire network in the first tunnel, M yl1 is the lateral penetration error on cross section 1 caused by the azimuth measurement error of the gyro orientation edge in the first section of the tunnel, M Tl1 is the lateral penetration error on cross section 1 caused by the azimuth measurement error of the gyro orientation edge in the first section of the tunnel, which is calculated by the following formula:
[0043]
[0044]
[0045] In the formula, m β1 is the angle measurement mean error of the cross-conductor network in the first section of the tunnel, which can be taken as the angle measurement mean error of the control network design. x1 is the vertical distance from each point of the cross-conductor network in the first tunnel to the cross section 1. l1 is the relative mean error of the side length of the cross-conductor network in the first tunnel, which can be taken as the relative mean error of the side length of the control network design. l1 is the distance measurement error of the first section of the cross-conductor network in the tunnel, d y1 It is the projected length of each side of the cross-wire network in the first section of the tunnel on the cross section 1. m T1 is the error in the azimuth measurement of the first gyro-oriented side, which can be taken as the nominal accuracy of the azimuth measurement of the gyro total station or 4″. L1 is the length of the first section of the cross-wire network in the tunnel.
[0046] It should be noted that in calculating M yβ1 and M yl1 When, first Figure 1 Select a branch conductor from the first section of the tunnel cross conductor network, such as P2-D1-D2-D3..., and then calculate its cross section 1 based on the branch conductor. and The reason why we divide by This is because the plane control network in the first section of the tunnel is a cross-conductor network instead of a branch conductor. That is, the cross-conductor network can be considered to be equivalent to two branch conductors, so the lateral penetration error is reduced. times.
[0047] It should also be noted that the reason why the influence of the azimuth measurement error of the first gyro-oriented edge is considered in the estimation of the lateral penetration error of the first cross-conductor network is that the first section of the tunnel-attached cross-conductor network is formed between the GNSS azimuth outside the tunnel and the first gyro-oriented edge inside the tunnel, that is, the azimuth observation value of the first gyro-oriented edge is used in the constraint adjustment of the first section of the tunnel-attached cross-conductor network. Tl1 In the formula, we need to divide by This is because the azimuth value of the first gyro orientation side during constrained adjustment uses the average value of the T11-T12 coordinate azimuth calculated using the side angle observation value of the first section of the cross-wire network and the gyro orientation observation azimuth of this side.
[0048] Furthermore, in step 2, the lateral penetration error M on cross section 2 caused by the angle and distance measurement errors of the cross-wire network in the second tunnel and the azimuth measurement error of the second gyro orientation edge is y2 Estimate according to the following formula:
[0049]
[0050] Among them, M yβ2 is the lateral penetration error on cross section 2 caused by the angle measurement error of the cross-wire network in the second tunnel, M yl2 is the lateral penetration error on cross section 2 caused by the azimuth measurement error of the gyro orientation edge in the second section of the tunnel. The calculation method is the same as step 1. Tl2 M is the mean error of the horizontal penetration on cross section 2 caused by the azimuth measurement error of the gyro-oriented edge in the second tunnel. Since the cross-wire network in the second tunnel consists of the first T11-T12 gyro-oriented edge and the second T21-T22 gyro-oriented edge, the mean error of the azimuth measurement of the second gyro-oriented edge will also cause the mean error of the horizontal penetration on cross section 2. In other words, the azimuth measurement errors of the first and second gyro-oriented edges will both cause the mean error of the horizontal penetration on cross section 2. Assume that the mean errors of the azimuth measurement of the first and second gyro-oriented edges are the same, that is, M T1 =M T2 , and the lengths of the cross-wire nets in the first and second sections of the hole are equal, that is, L1=L2, then M Tl2 It can be estimated as follows:
[0051]
[0052] Furthermore, in step 3, the lateral penetration error M on the cross section 3 caused by the angle measurement and distance measurement errors of the third section of the tunnel cross wire network and the azimuth measurement errors of the third gyro orientation edge T31-T32 is y3 The estimation method is exactly the same as in the second paragraph. The subsequent paragraphs are analogous until the last gyro orientation edge.
[0053] Furthermore, in step 4, the cross-wire network in the hole between the last gyro orientation edge and the penetration surface is measured for angle and distance errors and the azimuth measurement error of the last gyro orientation edge, resulting in a lateral penetration error M on the penetration surface. yi The estimation method is as follows:
[0054]
[0055] Among them, since the cross-conductor network in the hole between the last gyro orientation edge and the through-plane does not form a bonded cross-conductor network, that is, the last section of the cross-conductor network in the hole is actually a branch cross-conductor network, therefore, M yβi and M yli The calculation method is the same as step 1. However, M Tli Calculated by the following formula:
[0056]
[0057] Where Li is the length from the last gyro oriented edge to the through-plane.
[0058] Finally, the total transverse penetration error from the entrance to the penetration surface of the super-long tunnel is estimated according to the following formula:
[0059]
[0060] Assume that the total horizontal penetration error from the exit to the penetration surface of the super-long tunnel is estimated to be M y出 , M y出 The estimation method and M y进 The estimated value of the lateral penetration error of the super-long tunnel after taking into account the additional gyro azimuth of the conductor side should be:
[0061] It can be seen from the above examples that the present invention has the following obvious technical advantages over the traditional method of tunnel cross wire network whole network adjustment:
[0062] 1. The present invention effectively shortens the influence distance of the lateral penetration error caused by the angle measurement error of each measuring station in the cross-conductor network in the tunnel. Figure 1 For the D1 station in the figure, the impact distance of the new method is the distance from D1 point to cross section 1, while the traditional method is the distance from D1 point to the through-plane.
[0063] 2. The present invention not only takes into account the transmission error of the azimuth of the cross-conductor network in the tunnel, but also takes into account the observation error of the gyro azimuth of the gyro total station, and in a section of limited length (3-5 km), the error of the azimuth transmitted by the wire network in the tunnel through the side angle observation value is roughly equal to the observation error of the gyro azimuth, that is, the azimuth of the gyro orientation side participating in the adjustment is the average value of the wire azimuth and the gyro azimuth, so that the starting side azimuth value of the segmented constraint adjustment of the cross-conductor network in the tunnel of each section is more accurate.
[0064] 3. The present invention forms a segmented cross-conductor network in the tunnel for the first time and realizes the azimuth constraint adjustment at both ends. In the traditional method, the cross-conductor network in the tunnel is a branch network before the super-long tunnel is completed, and only the coordinates of the GNSS points of the tunnel entrance subnet are constrained to adjust the branch network.
[0065] In summary, the lateral penetration error on the penetration plane of the present invention will be much smaller than that of the traditional method.
[0066] In addition, the sequential adjustment of the present invention refers to the use of the coordinates of the two ends of the first directional side after the adjustment of the first section of the network as the starting point coordinates of the constraint adjustment of the second section of the network; the coordinates of the two ends of the second directional side after the adjustment of the second section of the network are used as the starting point coordinates of the constraint adjustment of the third section of the network; and so on, until the constraint adjustment of the last section of the network. The segmented sequential adjustment method of the plane control network in the tunnel taking into account the gyro azimuth measurement in the tunnel just fits the actual situation that the construction progress in the tunnel is slow and the main network of the plane control network in the tunnel needs to be extended in segments, so it should be promoted and applied in actual work.
Claims
1. A method for sequential adjustment of the plane control network in a super-long tunnel before the tunnel is completed, characterized in that: Gyro-oriented edges are measured in sections or at equal intervals in the cross-conductor network in the super-long tunnel, where A, B, P1, and P2 are GNSS plane control points near the entrance, and T11-T12, T21-T22, T31-T32, etc. are the gyro-oriented edges measured in the tunnel; according to the distribution of the measured gyro-oriented edges, the plane control network in the tunnel from the entrance to the through-surface of the super-long tunnel is divided into: the first section, i.e., the section from the entrance to T11-T12, the second section, i.e., the section from T11-T12 to T21-T22, the third section, i.e., the section from T21-T22 to T31-T32, and the last section, i.e., the section from Ti1-Ti2 to the through-surface; then, the section-wise sequential rigorous adjustment of the cross-conductor network in the tunnel is carried out according to the following steps: Step 1: When adjusting the first section of the cross-wire network in the tunnel, first use the GNSS starting point coordinates outside the tunnel to perform the initial constraint adjustment of the first section of the cross-wire network in the tunnel to obtain the coordinate azimuth of the T11-T12 side; then calculate the average value T of the coordinate azimuth of the T11-T12 side and the gyro azimuth observation value of the side α1 ; Then use the azimuth of the starting side of the GNSS outside the cave and the average value of the azimuth of the side coordinates of T11~T12 and the gyro azimuth α1 , forming the first section of the tunnel-attached cross-conductor network; finally, the constraint adjustment of the first section of the tunnel-attached cross-conductor network is performed; Step 2: When adjusting the cross-wire network in the second tunnel, first use the T11-T12 side to adjust the coordinate azimuth T of the cross-wire network in the previous tunnel. α1 and its coordinates, and the first constraint adjustment of the second section of the tunnel branch cross wire network is carried out to obtain the coordinate azimuth of the second oriented side T21~T22 calculated through the second section of the tunnel poor wire network, and then calculate the coordinate azimuth of the side T21~T22 and the average value of the gyro azimuth observation value of the side T α2 ; Then take the coordinate azimuth T of the T11~T12 side α1 and the azimuth angle T of the edge coordinates T21 to T22 α2 , forming the second section of the tunnel-attached cross-conductor network; finally, constrained adjustment is performed on the second section of the tunnel-attached cross-conductor network; Step 3: The segmented constraint adjustment method of the third and subsequent segments of the in-tunnel cross-wire network is analogous to that until the last in-tunnel gyroscopic orientation edge; Step 4: When adjusting the cross-wire network in the last tunnel, use the average value of the azimuth of the last gyro-oriented side obtained by the cross-wire network adjustment in the previous tunnel and the gyro azimuth of the side. αi , and the adjustment coordinates of the two end points of the last gyro orientation side obtained after the adjustment of the previous section of the cross-conductor network in the tunnel, the constrained adjustment of the last section of the branch cross-conductor network in the tunnel is carried out, so as to obtain the adjustment coordinates of the last section of the poorer wire network in the tunnel, including the coordinates of the through points on the through surface after the segmented measurement of the cross-conductor network in the tunnel in the direction of entering the tunnel and the sequential adjustment.
2. The method for sequential adjustment of the plane control network in the tunnel before the super-long tunnel is connected according to claim 1, characterized in that: In step 1, the lateral penetration error M on the cross section 1 is caused by the angle measurement and distance measurement errors of the first section of the tunnel cross wire network and the azimuth measurement error of the first gyro orientation edge. y1 Estimate according to the following formula: Among them, M yβ1 is the horizontal penetration error on cross section 1 caused by the angle measurement error of the cross-wire network in the first tunnel, M yl1 is the lateral penetration error on cross section 1 caused by the azimuth measurement error of the gyro orientation edge in the first section of the tunnel, M Tl1 is the lateral penetration error on cross section 1 caused by the azimuth measurement error of the gyro orientation edge in the first section of the tunnel, which is calculated by the following formula: In the formula, m β1 is the angle measurement error of the cross-wire network in the first section of the tunnel, R x1 is the vertical distance from each point of the cross-conductor network in the first section of the tunnel to the cross section 1, l1 is the relative mean error of the side length of the cross-conductor network in the first section of the tunnel, m l1 is the distance measurement error of the cross-conductor network in the first section of the tunnel, d y1 is the projection length of each side of the cross-wire network in the first section of the tunnel on cross section 1, m T1 is the mean error in the azimuth measurement of the first gyro orientation edge, and L1 is the length of the cross-wire network in the first section of the tunnel.
3. The method for sequential adjustment of the plane control network in the tunnel before the super-long tunnel is connected according to claim 2, characterized in that: In step 2, the lateral penetration error M on the cross section 2 is caused by the angle measurement and distance measurement error of the second section of the cross wire network in the tunnel and the azimuth measurement error of the second gyro orientation edge. y2 Estimate according to the following formula: Among them, M yβ2 is the lateral penetration error on cross section 2 caused by the angle measurement error of the cross-wire network in the second tunnel, M yl2 is the lateral penetration error on cross section 2 caused by the azimuth measurement error of the gyro orientation edge in the second section of the tunnel. The calculation method is the same as step 1; M Tl2 is the lateral penetration error on cross section 2 caused by the azimuth measurement error of the gyro orientation edge in the second section of the tunnel, which can be expressed by the formula calculate.
4. The method for sequential adjustment of the plane control network in a tunnel before the super-long tunnel is completed according to claim 3, characterized in that: In step 3, the lateral penetration error M on the cross section 3 is caused by the angle measurement and distance measurement errors of the third section of the tunnel cross wire network and the azimuth measurement errors of the third gyro orientation edge T31-T32. y3 The estimation method is exactly the same as in the second paragraph.
5. The method for sequential adjustment of the plane control network in a tunnel before the super-long tunnel is completed according to claim 2, characterized in that: In step 4, the cross-wire network in the hole between the last gyro orientation edge and the penetration surface is measured for angle and distance measurement errors and the azimuth measurement error of the last gyro orientation edge, and the lateral penetration error M caused on the penetration surface is calculated. yi The estimation method is as follows: Among them, M yβi and M yli The calculation method is the same as step 1; M Tli Calculated by the following formula: Where Li is the length from the last gyro oriented edge to the through-plane.
6. The method for sequential adjustment of the plane control network in a tunnel before the super-long tunnel is completed according to claim 5, characterized in that: The total transverse mean error from the entrance to the penetration surface of the super-long tunnel is estimated according to the following formula: Assume that the total horizontal penetration error from the exit to the penetration surface of the super-long tunnel is estimated to be M y出 , M y出 The estimation method and M y进 The estimated value of the lateral penetration error of the super-long tunnel after taking into account the additional gyro azimuth of the conductor side should be: