A monitoring method for the entire life cycle of a shield tunnel

Abstract

The present invention belongs to the technical field of tunnel construction monitoring, and provides a monitoring method for the entire life cycle of a shield tunnel, including establishing a shield tunnel deformation calculation method; setting a plurality of monitoring sections along the entire length of the shield tunnel, and setting a plurality of monitoring points at the monitoring sections; setting a horizontal displacement monitoring instrument and a vertical displacement monitoring instrument at the monitoring points; obtaining the horizontal displacement data of the shield tunnel through the horizontal displacement monitoring instrument, and obtaining the vertical displacement data of the shield tunnel through the vertical displacement monitoring instrument; obtaining the horizontal displacement change through the horizontal displacement data, and obtaining the vertical displacement change through the vertical displacement data, and obtaining the overall settlement displacement and cross-sectional deformation of the shield tunnel through the horizontal displacement data and the vertical displacement data in combination with the shield tunnel deformation calculation method. The monitoring method can monitor the shield tunnel as a whole, can directly determine the shield tunnel situation, and the monitoring point can be used permanently, which is conducive to full life cycle monitoring.

Description

Technical Field

[0001] The present invention relates to the technical field of tunnel construction monitoring, and in particular to a monitoring method for the entire life cycle of a shield tunnel. Background Art

[0002] With the rapid development of urbanization, the scale of cities has expanded rapidly, and the problems of lack of ground space and traffic congestion have become increasingly prominent. The development of underground transportation has become an indispensable solution in current urban construction, and shield tunnel construction has been greatly developed. The subway and intercity railway network is becoming more and more dense. With the development and utilization of a large amount of underground space, it is inevitable that many foundation pit projects near subways and intercity tunnels will appear. A large number of tunnel engineering cases show that the deformation of existing tunnels caused by foundation pit excavation is comprehensive. In order to grasp the overall stability of the tunnel, it is necessary to monitor the deformation of the tunnel.

[0003] At present, the existing tunnel structure section is monitored from the inside using a total station. The total station monitoring can only obtain the displacement of a single point, but cannot obtain the overall displacement and deformation of the tunnel structure, that is, it is impossible to directly determine the settlement, floating and horizontal displacement of the tunnel structure.

[0004] Therefore, we propose a monitoring method for the entire life cycle of shield tunnels. Summary of the invention

[0005] In order to overcome the shortcomings of the prior art, the present invention provides a deformation monitoring method for the entire life cycle of a shield tunnel. The method can monitor the entire life cycle of an existing shield tunnel, obtain the overall displacement and deformation of the tunnel, and perform subsequent monitoring after the completion of tunnel construction, the coupling influence of displacement and deformation caused by foundation pit excavation near the tunnel and tunnel operation, and grasp the overall displacement and structural deformation of subsequent subway tunnels after subway operation.

[0006] To achieve the above object, the present invention adopts the following technical solutions:

[0007] A method for monitoring the entire life cycle of a shield tunnel comprises the following steps:

[0008] Establish a shield tunnel deformation calculation method;

[0009] Several monitoring sections are set up along the entire length of the shield tunnel, and several monitoring points are set up in the monitoring sections; horizontal displacement monitoring instruments and vertical displacement monitoring instruments are set up at the monitoring points;

[0010] Acquiring horizontal displacement data of the shield tunnel through the horizontal displacement monitoring instrument, and acquiring vertical displacement data of the shield tunnel through the vertical displacement monitoring instrument;

[0011] The horizontal displacement change curve of the shield tunnel is drawn by the horizontal displacement data of the shield tunnel to obtain the horizontal displacement change of the shield tunnel over its entire life cycle;

[0012] A vertical displacement change curve of the shield tunnel is drawn using the vertical displacement data of the shield tunnel to obtain the vertical displacement change of the shield tunnel over its entire life cycle;

[0013] The horizontal displacement data of the shield tunnel and the vertical displacement data of the shield tunnel are substituted into the shield tunnel deformation calculation method to calculate the overall settlement displacement and cross-sectional deformation of the shield tunnel.

[0014] Furthermore, the shield tunnel deformation calculation method includes the shield tunnel vertical deformation calculation and the shield tunnel horizontal deformation calculation.

[0015] Furthermore, the shield tunnel vertical deformation calculation includes the overall settlement displacement calculation of the shield tunnel and the cross-sectional vertical deformation calculation of the shield tunnel;

[0016] The overall settlement displacement calculation of the shield tunnel includes:

[0017] The settlement displacement of the shield tunnel vault monitoring point is selected as the overall settlement displacement of the shield tunnel. The calculation formula of the settlement displacement of the shield tunnel vault monitoring point is:

[0018]

[0019] Among them, i represents the i-th monitoring, represents the settlement displacement of the shield tunnel vault monitoring point during the i-th monitoring, represents the vertical coordinate value of the monitoring point at the shield tunnel vault for the ith monitoring time, Indicates the initial vertical coordinate value of the monitoring point at the crown of the shield tunnel;

[0020] The calculation of the vertical deformation of the cross section of the shield tunnel includes:

[0021] The vertical deformation of the cross section of the monitoring points of the shield tunnel except the crown monitoring point is selected as the vertical deformation of the cross section of the shield tunnel. The calculation formula of the vertical deformation of the cross section of the monitoring points of the shield tunnel except the crown monitoring point is:

[0022] =

[0023] Among them, i represents the i-th monitoring, j represents the serial number of the monitoring point, Indicates the vertical deformation of the cross section of the shield tunnel except the monitoring point of the vault. It represents the vertical coordinate value of the i-th monitoring of the j-th monitoring point, represents the initial vertical coordinate value of the jth monitoring point, Represents the settlement displacement of the monitoring point on the crown of the shield tunnel during the i-th monitoring.

[0024] Furthermore, the shield tunnel horizontal deformation calculation method includes the shield tunnel rigid body horizontal displacement calculation and the shield tunnel cross-section horizontal deformation calculation;

[0025] The rigid body horizontal displacement calculation of the shield tunnel includes:

[0026] The horizontal displacement of the shield tunnel vault monitoring point is selected as the rigid body horizontal displacement of the shield tunnel. The calculation formula for the horizontal displacement of the shield tunnel vault monitoring point is:

[0027]

[0028] Among them, i represents the i-th monitoring, represents the horizontal displacement of the monitoring point of the shield tunnel vault during the i-th monitoring, represents the horizontal coordinate value of the monitoring point at the shield tunnel vault for the i-th monitoring, Indicates the initial horizontal coordinate value of the monitoring point at the crown of the shield tunnel;

[0029] The calculation of horizontal deformation of the shield tunnel section includes:

[0030] The horizontal deformation of the cross section of the monitoring points of the shield tunnel except the vault monitoring point is selected as the horizontal deformation of the cross section of the shield tunnel. The calculation formula of the horizontal deformation of the cross section of the monitoring points of the shield tunnel except the vault monitoring point is:

[0031]

[0032] Among them, i represents the i-th monitoring, j represents the serial number of the monitoring point, Indicates the horizontal deformation of the cross section of the shield tunnel at the monitoring points other than the vault monitoring point. It represents the horizontal coordinate value of the jth monitoring point at the ith time. represents the initial horizontal coordinate value of the jth monitoring point, It represents the horizontal displacement of the monitoring point on the crown of the shield tunnel during the i-th monitoring.

[0033] Furthermore, the shield tunnel is composed of several groups of segment rings, the cross-section of the segment structure of the segment ring is circular, and the segment structure includes: an arch bottom arc section located at the arch bottom position of the cross-section, an arch top arc section located at the arch top position of the cross-section, two arch waist upper arc sections and two arch waist lower arc sections located at the arch waist positions on both sides of the cross-section.

[0034] Furthermore, the arch bottom arc segment is connected to the two arch waist lower arc segments, the two arch waist lower arc segments are connected to the two arch waist upper arc segments, and the two arch waist upper arc segments are connected to the arch top arc segment. The arch top arc segment, the two arch waist lower arc segments and the two arch waist upper arc segments are all reserved with monitoring point position determination points.

[0035] Furthermore, five monitoring points are arranged on one monitoring section, and the five monitoring points include S1 monitoring point, S2 monitoring point, S3 monitoring point, S4 monitoring point and S5 monitoring point. The S1 monitoring point is arranged on the inner side of one of the lower circular arc segments of the arch waist, the S5 monitoring point is arranged on the inner side of another lower circular arc segment of the arch waist, the S2 monitoring point is arranged on the inner side of one of the upper circular arc segments of the arch waist, the S4 monitoring point is arranged on the inner side of another upper circular arc segment of the arch waist, and the S3 monitoring point is arranged on the inner side of the arch crown circular arc segment.

[0036] Furthermore, the monitoring section is arranged at intervals of 10 groups of segment rings along the entire length of the shield tunnel.

[0037] Compared with the prior art, the present invention has the following technical effects:

[0038] The present invention provides a monitoring method for the entire life cycle of a shield tunnel. In the method, a method for calculating the overall displacement and deformation of the shield tunnel is established, a plurality of monitoring sections are set along the entire length of the shield tunnel, a plurality of monitoring points are set on the monitoring sections, and a horizontal displacement monitoring instrument and a vertical displacement monitoring instrument are set at the monitoring points to monitor the shield tunnel. The data obtained by the horizontal displacement monitoring instrument can obtain the overall horizontal displacement change of the shield tunnel, and the data obtained by the vertical displacement monitoring instrument can obtain the overall vertical displacement change of the shield tunnel. The data of the horizontal displacement monitoring instrument and the vertical displacement monitoring instrument are combined with the shield tunnel deformation calculation method to obtain the overall settlement displacement and cross-sectional deformation of the shield tunnel. The monitoring method can monitor the entire shield tunnel, can directly determine the settlement change, floating, horizontal displacement and overall displacement and deformation of the shield tunnel, and is convenient for grasping the overall safety of the shield tunnel structure.

[0039] Furthermore, the monitoring points can be used permanently, so that the shield tunnel can be monitored throughout its life cycle, reflecting the structural status of the shield tunnel throughout its life cycle, which is conducive to controlling the safety of the shield tunnel throughout its life cycle. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] Figure 1 A flowchart of a method for monitoring the entire life cycle of a shield tunnel according to an embodiment of the present invention;

[0041] Figure 2 A schematic diagram of the layout of monitoring points for the cross section of a shield tunnel according to an embodiment of the present invention;

[0042] Figure 3 It is a schematic diagram of the installation of shield tunnel segments according to an embodiment of the present invention;

[0043] Figure 4 Schematic diagram of the position of the monitoring point position determination point according to an embodiment of the present invention.

[0044] Explanation of the accompanying reference numerals: 1. A1 segment, 2. A2 segment, 3. A3 segment, 4. B1 segment, 5. B2 segment, 6. K segment, 7. S1 monitoring point, 8. S2 monitoring point, 9. S3 monitoring point, 10. S4 monitoring point, 11. S5 monitoring point, 12. S1 monitoring point position determination point, 13. S2 monitoring point position determination point, 14. S3 monitoring point position determination point, 15. S4 monitoring point position determination point, 16. S5 monitoring point position determination point. DETAILED DESCRIPTION

[0045] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0046] It should be noted that the following detailed descriptions are exemplary and are intended to provide further explanation of the present application. Unless otherwise specified, all technical and scientific terms used herein have the same meanings as those commonly understood by those skilled in the art to which the present application belongs.

[0047] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0048] See also Figure 1 , Figure 1 This embodiment provides a method for monitoring the entire life cycle of a shield tunnel, comprising the following steps:

[0049] Step S1: Establish a shield tunnel deformation calculation method, and combine it with monitoring data to calculate the overall settlement displacement and cross-sectional deformation of the shield tunnel.

[0050] Specifically, the shield tunnel deformation calculation method includes the shield tunnel vertical deformation calculation and the shield tunnel horizontal deformation calculation.

[0051] For details, please refer to Figure 2 , Figure 2 Schematic diagram of the layout of monitoring points in the cross section of a shield tunnel. Figure 2There are 5 monitoring points, namely S1 monitoring point 7, S2 monitoring point 8, S3 monitoring point 9, S4 monitoring point 10 and S5 monitoring point 11. The vertical deformation of the shield tunnel is divided into two parts: overall settlement and cross-sectional vertical deformation. The vertical deformation calculation of the shield tunnel includes the overall settlement displacement calculation of the shield tunnel and the cross-sectional vertical deformation calculation of the shield tunnel.

[0052] Specifically, the overall settlement displacement calculation of the shield tunnel, the deformation of the shield tunnel vault is the settlement deformation, S3 monitoring point 9 is located at the shield tunnel vault, the settlement displacement of S3 monitoring point 9 is selected as the overall settlement displacement of the shield tunnel, and the initial coordinates of S3 monitoring point 9 are recorded. , record the subsequent coordinates of S3 monitoring point 9 , i represents the i-th monitoring, then the calculation formula for the settlement displacement of the S3 monitoring point 9 of the shield tunnel in the i-th monitoring is:

[0053]

[0054] Among them, i represents the i-th monitoring, represents the settlement displacement of the shield tunnel vault monitoring point during the i-th monitoring, represents the vertical coordinate value of the monitoring point at the shield tunnel vault for the ith monitoring time, Indicates the initial vertical coordinate value of the monitoring point at the crown of the shield tunnel;

[0055] Specifically, the vertical deformation of the cross section of the shield tunnel is calculated. The vertical deformation of the cross section of the monitoring points of the shield tunnel except the S3 monitoring point 9 is selected as the vertical deformation of the cross section of the shield tunnel. The initial coordinates and subsequent coordinates of the S1 monitoring point 7, S2 monitoring point 8, S4 monitoring point 10 and S5 monitoring point 11 are recorded. The calculation formula for the vertical deformation of the cross section of the monitoring points of the shield tunnel except the S3 monitoring point 9 in the i-th monitoring is:

[0056] =

[0057] in, Indicates the vertical deformation of the cross section of the shield tunnel except the S3 monitoring point 9. It represents the vertical coordinate value of the i-th monitoring of the j-th monitoring point, represents the initial vertical coordinate value of the jth monitoring point, Indicates the settlement displacement of monitoring point 9 of S3 of the shield tunnel for the i-th time, i indicates the i-th monitoring, j indicates the sequence number of the monitoring point, j=1,2,4,5.

[0058] Specifically, the horizontal deformation of the shield tunnel is divided into two parts: the horizontal displacement of the rigid body and the horizontal deformation of the cross section. The calculation of the horizontal deformation of the shield tunnel includes the calculation of the horizontal displacement of the rigid body of the shield tunnel and the calculation of the horizontal deformation of the cross section of the shield tunnel.

[0059] Specifically, the rigid body horizontal displacement calculation of the shield tunnel selects the horizontal displacement of the S3 monitoring point 9 as the rigid body horizontal displacement of the shield tunnel, and records the initial coordinates of the S3 monitoring point 9 , record the subsequent coordinates of S3 monitoring point 9 , i represents the i-th monitoring, then the calculation formula for the rigid body horizontal displacement of S3 monitoring point 9 of the shield tunnel in the i-th monitoring is:

[0060]

[0061] Among them, i represents the i-th monitoring, represents the horizontal displacement of the monitoring point of the shield tunnel vault during the i-th monitoring, represents the horizontal coordinate value of the monitoring point at the shield tunnel vault for the i-th monitoring, Indicates the initial horizontal coordinate value of the monitoring point at the crown of the shield tunnel;

[0062] Specifically, the cross-sectional horizontal deformation of the shield tunnel is calculated by selecting the cross-sectional horizontal deformation of the monitoring points of the shield tunnel except the S3 monitoring point 9 as the cross-sectional horizontal deformation of the shield tunnel, and recording the initial coordinates and subsequent coordinates of the S1 monitoring point 7, S2 monitoring point 8, S4 monitoring point 10 and S5 monitoring point 11. The calculation formula for the cross-sectional horizontal deformation of the monitoring points of the shield tunnel except the S3 monitoring point 9 for the i-th monitoring is:

[0063]

[0064] in, Indicates the horizontal deformation of the cross section of the shield tunnel except the S3 monitoring point 9. It represents the horizontal coordinate value of the jth monitoring point at the ith time. represents the initial horizontal coordinate value of the jth monitoring point, Indicates the horizontal displacement of monitoring point 9 of S3 of the shield tunnel during the i-th monitoring. i indicates the i-th monitoring, and j indicates the sequence number of the monitoring point, j=1,2,4,5.

[0065] Step S2: several monitoring sections are set up along the entire length of the shield tunnel, and monitoring points are arranged on the monitoring sections.

[0066] For details, please refer to Figure 3 , Figure 3The figure is a schematic diagram of the installation of shield tunnel segments. The shield tunnel is composed of several groups of segment rings. One segment ring is composed of 6 shield tunnel segments, and the 6 shield tunnel segments are connected by bolts. The segment structure of the segment ring is circular in cross section. The segment structure of the segment ring includes: an arch bottom arc segment located at the arch bottom of the cross section, an arch top arc segment located at the arch top of the cross section, two arch waist upper arc segments located at the arch waist positions on both sides of the cross section, and two arch waist lower arc segments. Among them, the arch bottom arc segment located at the arch bottom of the cross section is A2 segment 2, the arch top arc segment located at the arch top of the cross section is K segment 6, the arch waist lower arc segment located at the left side of the cross section is A3 segment 3, the arch waist upper arc segment located at the left side of the cross section is B1 segment 4, the arch waist lower arc segment located at the right side of the cross section is A1 segment 1, and the arch waist upper arc segment located at the right side of the cross section is B2 segment 5. The left side of A2 segment 2 is connected to A3 segment 3, the right side of A2 segment 2 is connected to A1 segment 1, the left side of K segment 6 is connected to B1 segment 4, the right side of K segment 6 is connected to B2 segment 5, the other side of B2 segment 5 is connected to A1 segment 1, and the other side of B1 segment 4 is connected to A3 segment 3.

[0067] For details, please refer to Figure 4 , Figure 4 The schematic diagram of the location of the monitoring point position determination point. The monitoring points are arranged on the shield tunnel segments. One monitoring section is arranged with 5 monitoring points, namely S1 monitoring point 7, S2 monitoring point 8, S3 monitoring point 9, S4 monitoring point 10 and S5 monitoring point 11. Among them, S1 monitoring point 7 is set on the inner side of A3 segment 3, S2 monitoring point 8 is set on the inner side of B1 segment 4, S3 monitoring point 9 is set on the inner side of K segment 6. The midpoint, S4 monitoring point 10 is set on the inner side of B2 segment 5, and S5 monitoring point 11 is set on the inner side of A1 segment 1. A1 segment 1, A3 segment 3, B1 segment 4, B2 segment 5 and K segment 6 are all reserved with monitoring point position determination points, including S1 monitoring point position determination point 12, S2 monitoring point position determination point 13, S3 monitoring point position determination point 14, S4 monitoring point position determination point 15, S5 monitoring point position determination point 16. The monitoring point position determination point is used to determine the position of the monitoring point. For prefabricated shield tunnel segments, extended steel bars are reserved in advance during segment production to determine the location of monitoring points. For cast-in-place shield tunnel segments, the location of reserved steel bars is determined during the steel mesh tying process.

[0068] Specifically, starting from the first monitoring section, a monitoring section is set up every 10 groups of segment rings. The 5 monitoring points of each monitoring section are arranged in the same way, and each group of segment rings of the shield tunnel must also be arranged in the same way.

[0069] Step S3: Install horizontal displacement monitoring instruments and vertical displacement monitoring instruments at monitoring points. The horizontal displacement monitoring instruments are used to monitor the horizontal displacement changes of the shield tunnel, and the vertical displacement monitoring instruments are used to monitor the vertical displacement changes of the shield tunnel. Regularly record and analyze the monitoring data of the horizontal displacement monitoring instruments and the vertical displacement monitoring instruments to grasp the vertical displacement changes and horizontal displacement changes during the entire life cycle of the shield tunnel.

[0070] Specifically, the horizontal displacement monitoring instrument is placed and fixed at the S1~S5 monitoring points using reserved steel bars, and starts to monitor the horizontal displacement of the shield tunnel and record the initial data. The horizontal displacement monitoring instrument transmits the monitoring data to the terminal through the data line, reads and records the data according to the monitoring frequency specified in the specification, and draws the horizontal displacement change curve of the shield tunnel through the horizontal displacement data of the shield tunnel. The horizontal displacement change of the shield tunnel throughout its life cycle can be obtained, which is conducive to grasping the deformation law of the horizontal displacement of the shield tunnel under different loads during the construction process and subsequent operation.

[0071] Specifically, the vertical displacement monitoring instrument is an electronic level, which is placed and fixed at the S1~S5 monitoring points using reserved steel bars, and starts to monitor the vertical displacement of the shield tunnel and record the initial data. The electronic level transmits the monitoring data to the terminal through the data line, reads and records the data according to the monitoring frequency specified in the specification, and draws the vertical displacement change curve of the shield tunnel through the vertical displacement data of the shield tunnel. The vertical displacement change of the shield tunnel throughout its life cycle can be obtained, which is conducive to grasping the change law of the vertical displacement of the shield tunnel under different loads during the construction process and subsequent operation.

[0072] Step S4: Substitute the horizontal displacement data and the vertical displacement data of the shield tunnel into the shield tunnel deformation calculation method to calculate the vertical deformation and the horizontal deformation of the shield tunnel, thereby obtaining the overall settlement displacement and cross-sectional deformation of the shield tunnel.

[0073] As an example, the vertical deformation and horizontal deformation of the shield tunnel are calculated using the third monitoring data, so as to obtain the overall settlement displacement and cross-sectional deformation of the shield tunnel monitored for the third time.

[0074] Specifically, the vertical deformation of the shield tunnel includes two parts: overall settlement and cross-sectional vertical deformation. Therefore, the calculation of the vertical deformation of the shield tunnel includes the calculation of the overall settlement displacement of the shield tunnel and the calculation of the cross-sectional vertical deformation of the shield tunnel. First, the overall settlement displacement of the shield tunnel is calculated. The S3 monitoring point 9 is located at the top of the shield tunnel. The settlement displacement of the S3 monitoring point 9 represents the overall settlement displacement of the shield tunnel. The initial vertical coordinate value of the S3 monitoring point 9 monitored by the electronic level and the vertical coordinate value of the third monitoring are substituted into the calculation formula of the settlement displacement of the S3 monitoring point 9 of the shield tunnel. The settlement displacement of the S3 monitoring point 9 of the third monitoring of the shield tunnel is obtained. The settlement displacement of the S3 monitoring point 9 is the overall settlement displacement of the shield tunnel of the third monitoring. Then, the vertical deformation of the cross section of the shield tunnel is calculated, and the vertical deformation of the cross section of S1 monitoring point 7, S2 monitoring point 8, S4 monitoring point 10 and S5 monitoring point 11 is used to represent the vertical deformation of the cross section of the shield tunnel. The initial vertical coordinate values ​​of S1 monitoring point 7, S2 monitoring point 8, S4 monitoring point 10 and S5 monitoring point 11, the vertical coordinate values ​​of the third monitoring and the calculated overall settlement displacement of the shield tunnel of the third monitoring are substituted into the calculation formula of the vertical deformation of the cross section of the monitoring points of the shield tunnel except S3 monitoring point 9, and the vertical deformation of the cross section of S1 monitoring point 7, S2 monitoring point 8, S4 monitoring point 10 and S5 monitoring point 11 of the shield tunnel of the third monitoring is obtained. The vertical deformation of the cross section of S1 monitoring point 7, S2 monitoring point 8, S4 monitoring point 10 and S5 monitoring point 11 is the vertical deformation of the cross section of the shield tunnel of the third monitoring.

[0075] Specifically, the horizontal deformation of the shield tunnel includes two parts: the horizontal displacement of the rigid body and the horizontal deformation of the cross section. Therefore, the calculation of the horizontal deformation of the shield tunnel includes the calculation of the horizontal displacement of the rigid body of the shield tunnel and the calculation of the horizontal deformation of the cross section of the shield tunnel. First, the rigid horizontal displacement of the shield tunnel is calculated. The S3 monitoring point 9 is located at the top of the shield tunnel. The horizontal displacement of the S3 monitoring point 9 represents the rigid horizontal displacement of the shield tunnel. The initial horizontal coordinate value of the S3 monitoring point 9 monitored by the horizontal displacement monitoring instrument and the horizontal coordinate value of the third monitoring are substituted into the calculation formula of the rigid horizontal displacement of the S3 monitoring point 9 of the shield tunnel. The rigid horizontal displacement of the S3 monitoring point 9 of the shield tunnel in the third monitoring is obtained. The rigid horizontal displacement of the S3 monitoring point 9 is the rigid horizontal displacement of the shield tunnel in the third monitoring. Then, the horizontal deformation of the cross section of the shield tunnel is calculated, and the horizontal deformation of the cross section of S1 monitoring point 7, S2 monitoring point 8, S4 monitoring point 10 and S5 monitoring point 11 is used to represent the horizontal deformation of the cross section of the shield tunnel. The initial horizontal coordinate values ​​of S1 monitoring point 7, S2 monitoring point 8, S4 monitoring point 10 and S5 monitoring point 11, the horizontal coordinate values ​​of the third monitoring and the calculated rigid body horizontal displacement of the shield tunnel of the third monitoring are substituted into the calculation formula of the horizontal deformation of the cross section of the monitoring points of the shield tunnel except S3 monitoring point 9, and the horizontal deformation of the cross section of S1 monitoring point 7, S2 monitoring point 8, S4 monitoring point 10 and S5 monitoring point 11 of the shield tunnel of the third monitoring is obtained. The horizontal deformation of the cross section of S1 monitoring point 7, S2 monitoring point 8, S4 monitoring point 10 and S5 monitoring point 11 is the horizontal deformation of the cross section of the shield tunnel of the third monitoring.

[0076] Specifically, the settlement displacement of S3 monitoring point 9 in the third monitoring represents the overall settlement displacement of the shield tunnel in the third monitoring, and the horizontal deformation and vertical deformation of the cross section of S1 monitoring point 7, S2 monitoring point 8, S4 monitoring point 10 and S5 monitoring point 11 in the third monitoring represent the cross section deformation of the shield tunnel in the third monitoring.

[0077] Specifically, the equipment used at the monitoring points are all automated monitoring equipment. The equipment must be inspected regularly, and any damaged or non-working instruments must be replaced in a timely manner to ensure the continuity of monitoring. The lines of the monitoring instruments must be clustered and well protected to ensure that the lines are not damaged during use. When the shield tunnel is near external operations, further testing is performed at the construction monitoring points. On the basis of the completion monitoring, the deformation during the operation phase is mastered, and combined with the staged monitoring control values, the foundation pit design plan is coordinated to ensure the safety of the tunnel section. In this way, the construction monitoring points can be used permanently, and the operation intervals can be used to form continuous and accumulated tunnel structure deformation data from the entire process of construction, operation, and interference and at different stages, thereby realizing the full life cycle monitoring of the shield tunnel.

[0078] The above description is only a preferred embodiment of the present disclosure and is not intended to limit the present disclosure. For those skilled in the art, the present disclosure may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present disclosure shall be included in the protection scope of the present disclosure.

[0079] Although the above describes the specific implementation methods of the present disclosure in conjunction with the accompanying drawings, it is not intended to limit the scope of protection of the present disclosure. Technical personnel in the relevant field should understand that on the basis of the technical solution of the present disclosure, various modifications or variations that can be made by those skilled in the art without creative work are still within the scope of protection of the present disclosure.

Claims

1. A method for monitoring the entire life cycle of a shield tunnel, characterized in that: The steps include: Establish a shield tunnel deformation calculation method; A plurality of monitoring sections are arranged along the entire length of the shield tunnel, and a plurality of monitoring points are arranged in the monitoring sections; A horizontal displacement monitoring instrument and a vertical displacement monitoring instrument are arranged at the monitoring point, and horizontal displacement data of the shield tunnel is obtained by the horizontal displacement monitoring instrument, and vertical displacement data of the shield tunnel is obtained by the vertical displacement monitoring instrument; The horizontal displacement change curve of the shield tunnel is drawn by the horizontal displacement data of the shield tunnel to obtain the horizontal displacement change of the shield tunnel over its entire life cycle; A vertical displacement change curve of the shield tunnel is drawn using the vertical displacement data of the shield tunnel to obtain the vertical displacement change of the shield tunnel over its entire life cycle; Substituting the horizontal displacement data of the shield tunnel and the vertical displacement data of the shield tunnel into the shield tunnel deformation calculation method to calculate the overall settlement displacement and cross-sectional deformation of the shield tunnel; The shield tunnel deformation calculation method includes the shield tunnel vertical deformation calculation and the shield tunnel horizontal deformation calculation; The shield tunnel vertical deformation calculation includes the overall settlement displacement calculation of the shield tunnel and the cross-sectional vertical deformation calculation of the shield tunnel; The overall settlement displacement calculation of the shield tunnel includes: The settlement displacement of the shield tunnel vault monitoring point is selected as the overall settlement displacement of the shield tunnel. The calculation formula of the settlement displacement of the shield tunnel vault monitoring point is: Among them, i represents the i-th monitoring, represents the settlement displacement of the shield tunnel vault monitoring point during the i-th monitoring, represents the vertical coordinate value of the monitoring point at the shield tunnel vault for the ith monitoring time, Indicates the initial vertical coordinate value of the monitoring point at the crown of the shield tunnel; The calculation of the vertical deformation of the cross section of the shield tunnel includes: The vertical deformation of the cross section of the monitoring points of the shield tunnel except the crown monitoring point is selected as the vertical deformation of the cross section of the shield tunnel. The calculation formula of the vertical deformation of the cross section of the monitoring points of the shield tunnel except the crown monitoring point is: Among them, i represents the i-th monitoring, j represents the serial number of the monitoring point, Indicates the vertical deformation of the cross section of the shield tunnel except the monitoring point of the vault. It represents the vertical coordinate value of the i-th monitoring of the j-th monitoring point, represents the initial vertical coordinate value of the jth monitoring point, represents the settlement displacement of the monitoring point of the shield tunnel vault during the i-th monitoring; The shield tunnel horizontal deformation calculation method includes the shield tunnel rigid body horizontal displacement calculation and the shield tunnel cross-section horizontal deformation calculation; The rigid body horizontal displacement calculation of the shield tunnel includes: The horizontal displacement of the shield tunnel vault monitoring point is selected as the rigid body horizontal displacement of the shield tunnel. The calculation formula for the horizontal displacement of the shield tunnel vault monitoring point is: Among them, i represents the i-th monitoring, represents the horizontal displacement of the monitoring point of the shield tunnel vault during the i-th monitoring, represents the horizontal coordinate value of the monitoring point at the shield tunnel vault for the i-th monitoring, Indicates the initial horizontal coordinate value of the monitoring point at the crown of the shield tunnel; The calculation of the horizontal deformation of the cross section of the shield tunnel includes: The horizontal deformation of the cross section of the monitoring points of the shield tunnel except the vault monitoring point is selected as the horizontal deformation of the cross section of the shield tunnel. The calculation formula of the horizontal deformation of the cross section of the monitoring points of the shield tunnel except the vault monitoring point is: Among them, i represents the i-th monitoring, j represents the serial number of the monitoring point, Indicates the horizontal deformation of the cross section of the shield tunnel at the monitoring points other than the vault monitoring point. It represents the horizontal coordinate value of the jth monitoring point at the ith time. represents the initial horizontal coordinate value of the jth monitoring point, It represents the horizontal displacement of the monitoring point on the crown of the shield tunnel during the i-th monitoring.

2. A method for monitoring the entire life cycle of a shield tunnel according to claim 1, characterized in that: The shield tunnel is composed of several groups of segment rings, and the cross-section of the segment structure of the segment ring is circular. The segment structure includes: an arch bottom arc section located at the arch bottom position of the cross-section, an arch top arc section located at the arch top position of the cross-section, two arch waist upper arc sections and two arch waist lower arc sections located at the arch waist positions on both sides of the cross-section.

3. A method for monitoring the entire life cycle of a shield tunnel according to claim 2, characterized in that: The arch bottom arc segment is connected to the two arch waist lower arc segments, the two arch waist lower arc segments are connected to the two arch waist upper arc segments, and the two arch waist upper arc segments are connected to the arch top arc segment. The arch top arc segment, the two arch waist lower arc segments and the two arch waist upper arc segments are all reserved with monitoring point position determination points.

4. A method for monitoring the entire life cycle of a shield tunnel according to claim 2, characterized in that: Five monitoring points are arranged on one monitoring section, and the five monitoring points include S1 monitoring point, S2 monitoring point, S3 monitoring point, S4 monitoring point and S5 monitoring point. The S1 monitoring point is arranged on the inner side of one of the lower circular arc segments of the arch waist, the S5 monitoring point is arranged on the inner side of another lower circular arc segment of the arch waist, the S2 monitoring point is arranged on the inner side of one of the upper circular arc segments of the arch waist, the S4 monitoring point is arranged on the inner side of another upper circular arc segment of the arch waist, and the S3 monitoring point is arranged on the inner side of the arch crown circular arc segment.

5. A method for monitoring the entire life cycle of a shield tunnel according to claim 2, characterized in that: The monitoring section is arranged at intervals of 10 groups of segment rings along the entire length of the shield tunnel.

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