A tunnel boring machine steel arch installation system and method

Abstract

The present disclosure relates to a tunnel boring machine steel arch installation system and method, comprising: a steel arch installation device, an upper computer, a plurality of laser range finders, a plurality of laser barriers, a programmable controller, the laser range finders are configured in pairs with the laser barriers; at least one of the plurality of laser barriers is a fixed laser barrier, which is used to be installed on the steel arch installation device, and the laser barriers installed on the steel arch installation device are movable laser barriers, which are used to be installed on the completed assembled steel arch; the plurality of laser range finders are installed on the fixed surface at the front end of the tunnel boring machine, and the first laser range finder configured in pairs with the fixed laser barrier and the second laser range finder configured in pairs with the movable laser barrier are vertically symmetrical about the central axis on the fixed surface.

Description

Technical Field

[0001] This disclosure relates to the field of tunnel steel arch frame installation technology, and in particular to a tunnel boring machine steel arch frame installation system and method. Background Technology

[0002] TBM (Tunnel Boring Machine) is a tunnel construction machine that integrates tunnel excavation, muck removal, support, and ventilation functions, enabling one-time tunnel excavation. In open-face TBM construction, after the excavation of the final ring, steel arch frames are installed to support the tunnel and improve its stability and safety. Therefore, improving the rationality of steel arch frame installation can, to a certain extent, enhance the stability and safety of the tunnel.

[0003] In related technologies, the distance between two steel arch frames during installation is often determined manually. However, manual positioning is prone to errors. Errors in the distance between the two steel arch frames not only directly affect the quality of the support but also the tightness of the subsequent TBM support shoes. This is because the TBM support shoes need to be supported on the tunnel wall after excavation, and the support shoes have pre-drilled slots for the steel arch frames. If the installation and positioning of the steel arch frames are inaccurate, it will affect the tightness of the subsequent support shoes. Summary of the Invention

[0004] To overcome the technical problem of inaccurate installation and positioning of steel arch frames during the installation process of tunnel boring machines in related technologies, this disclosure provides a steel arch frame installation system and method for tunnel boring machines.

[0005] In a first aspect of this disclosure, a steel arch frame installation system for a tunnel boring machine is provided, comprising:

[0006] The system includes a steel arch frame installer, a host computer, multiple laser rangefinders connected to the host computer, multiple laser blocking objects, and a programmable controller, wherein the laser rangefinders and the laser blocking objects are configured in pairs.

[0007] Among them, at least one of the plurality of laser shielding objects is used as a fixed laser shielding object and is used to be installed on the steel arch frame installer. Except for the laser shielding object installed on the steel arch frame installer, which is used as a movable laser shielding object, all of them are used to be installed on the assembled steel arch frame.

[0008] The multiple laser rangefinders are all installed on the fixed surface at the front end of the tunnel boring machine. The first laser rangefinder, which is paired with the fixed laser shield, and the second laser rangefinder, which is paired with the movable laser shield, are symmetrical about the vertical central axis on the fixed surface.

[0009] The programmable controller is used to control the extension of the hydraulic cylinder of the steel arch installation device, to control the movement of the steel arch installation device, to read the stroke value of the stroke sensor installed on the hydraulic cylinder during the movement, and to take the stroke value as the extension amount of the hydraulic cylinder;

[0010] The first laser range finder is used to measure the distance from the first laser range finder to the corresponding fixed laser shield during movement; and the second laser range finder is used to measure the distance from the second laser range finder to the corresponding movable laser shield during movement.

[0011] The upper computer is used to:

[0012] According to the distance from the first laser range finder to the corresponding fixed laser shield, a first distance is obtained; and according to the distance from the second laser range finder to the corresponding movable laser shield, a second distance is obtained.

[0013] A third distance between the measurement surface of the movable laser shield and the edge of the inner wall of the completed assembled steel arch close to the steel arch installation device is obtained.

[0014] A fourth distance between the measurement surface of the fixed laser shield and the edge of the inner wall of the to-be-assembled steel arch close to the front end of the shield tunneling machine close to the corresponding first laser range finder is obtained.

[0015] According to the first distance, the second distance, the third distance, the fourth distance, and a preset steel arch spacing, it is determined whether the steel arch installation device is moved into position.

[0016] In the case where it is determined that the steel arch installation device is moved into position, the extension of the hydraulic cylinder is stopped, and the steel arch installation device is controlled to assemble the to-be-assembled steel arch carried.

[0017] In a preferred embodiment, the installation of each movable laser shield satisfies the following conditions:

[0018] A first edge parallel to the measurement surface of the movable laser shield in the base of the movable laser shield coincides with the edge of the inner wall of the completed assembled steel arch closest to the steel arch installation device, and a second edge parallel to the measurement surface of the movable laser shield in the base of the movable laser shield is in the range of the inner wall of the completed assembled steel arch closest to the steel arch installation device, and the first edge and the second edge are non-adjacent edges.

[0019] In a preferred embodiment, the upper computer is used to:

[0020] acquire a fifth distance from the second laser range finder to the corresponding movable laser shield when the steel arch installation device clamps and fully expands the steel arch to be assembled, and a sixth distance from the first laser range finder to the corresponding fixed laser shield when the steel arch installation device clamps and fully expands the steel arch to be assembled;

[0021] In a preferred embodiment, the host computer is configured to:

[0022] In the case that the steel arch installation device clamps and fully expands the steel arch to be assembled, determine a fourth distance from a measuring surface of the fixed laser shield to an edge of an inner wall of the steel arch to be assembled close to the front end of the shield tunneling machine according to the third distance, the fifth distance, and the sixth distance.

[0023] In a preferred embodiment, the host computer is configured to:

[0024] Calculate a sum of the third distance and the fifth distance;

[0025] Take a difference between the sum and the sixth distance as the fourth distance from the measuring surface of the fixed laser shield to the edge of the inner wall of the steel arch to be assembled close to the front end of the shield tunneling machine.

[0026] In a preferred embodiment, the host computer is configured to:

[0027] Calculate a first sum of a distance sum of the second distance and the third distance; and

[0028] Calculate a second sum of a distance sum of the first distance and the fourth distance;

[0029] Determine whether the steel arch installation device is moved into position according to whether a difference between the first sum and the second sum is equal to the preset steel arch spacing;

[0030] Control an extension speed of the hydraulic cylinder according to a distance difference between the first sum and the second sum, wherein the extension speed is positively correlated with the distance difference.

[0031] In a preferred embodiment, a mounting height of the first laser range finder is consistent with a height of the corresponding fixed laser shield, so that laser emitted by the first laser range finder is perpendicular to the measuring surface of the corresponding fixed laser shield;

[0032] The installation height of the second laser range finder is consistent with the height of the corresponding movable laser shield, so that the laser emitted by the second laser range finder is perpendicular to the measurement surface of the corresponding movable laser shield.

[0033] In a preferred embodiment, the first laser range finder and the fixed laser shield are both multiple, and the upper computer is used to:

[0034] The average value of the distance from each first laser range finder to the corresponding fixed laser shield is calculated to obtain the first distance.

[0035] In a preferred embodiment, the second laser range finder and the movable laser shield are both multiple, and the upper computer is used to:

[0036] The average value of the distance from each second laser range finder to the corresponding movable laser shield is calculated to obtain the second distance.

[0037] In a second aspect of the embodiments of the present disclosure, a tunnel boring machine steel arch installation method is provided, which is executed by the upper computer in the tunnel boring machine steel arch installation system of any one of the first aspect.

[0038] The technical solutions provided by the embodiments of the present disclosure can include the following beneficial effects:

[0039] According to the distance from the first laser range finder to the corresponding fixed laser shield, a first distance is obtained; according to the distance from the second laser range finder to the corresponding movable laser shield, a second distance is obtained; a third distance between the measurement surface of the movable laser shield and the edge of the inner wall of the completed assembled steel arch near the steel arch installer is obtained; a fourth distance between the measurement surface of the fixed laser shield and the edge of the inner wall of the to-be-assembled steel arch near the front end of the shield machine near the corresponding first laser range finder is obtained; according to the first distance, the second distance, the third distance, the fourth distance, and a preset steel arch spacing, it is determined whether the steel arch installer is moved into position; in the case where it is determined that the steel arch installer is moved into position, the hydraulic cylinder is controlled to stop extending, and the steel arch installer is controlled to assemble the to-be-assembled steel arch carried. Thus, the accuracy of the tunnel boring machine steel arch installation is improved, and the accuracy, reliability, and safety of the tunnel construction are improved.

[0040] It should be understood that the above general description and the following detailed description are only exemplary and explanatory, and cannot limit the present disclosure. BRIEF DESCRIPTION OF DRAWINGS

[0041] The drawings herein are incorporated into the specification and form part of the specification, show embodiments consistent with the present disclosure, and together with the specification, serve to explain the principles of the present disclosure.

[0042] Figure 1 is a schematic diagram of a tunnel boring machine steel arch installation system according to an example embodiment.

[0043] Figure 2 is a schematic diagram of a tunnel boring machine steel arch installation system according to an example embodiment.

[0044] Figure 3 is a flowchart of a tunnel boring machine steel arch installation method according to an example embodiment.

[0045] Figure 4 is a flowchart of a tunnel boring machine steel arch installation method according to an example embodiment. DETAILED DESCRIPTION

[0046] The example embodiments will be described in detail herein with reference to the accompanying drawings. In the following description, unless otherwise indicated, like numbers in the different drawings represent similar or analogous elements. The following description of example embodiments is not representative of all embodiments consistent with the present disclosure. Rather, they are merely examples of apparatuses and methods consistent with some aspects of the present disclosure as detailed in the appended claims.

[0047] Figure 1 is a schematic diagram of a tunnel boring machine steel arch installation system according to an example embodiment. As shown in Figure 1 the tunnel boring machine steel arch installation system includes a steel arch installer, a host computer, a plurality of laser range finders in communication with the host computer, a plurality of laser obstructions, and a programmable controller, wherein each laser range finder is configured in pairs with a laser obstruction.

[0048] In the present disclosure, each laser range finder is configured in pairs with a laser obstruction.

[0049] In the present disclosure, the steel arch installer is used to assemble a steel arch to be assembled, and a guide roller on the steel arch installer is used to clamp the steel arch to be assembled. When the guide roller on the steel arch installer is fully deployed and clamps the steel arch to be assembled, the longitudinal center of the guide roller coincides with the longitudinal center of the steel arch to be assembled.

[0050] In the present disclosure, the steel arch to be assembled and the steel arch already assembled are both I-beams, and the inner wall is the side close to the center of the I-beam.

[0051] In the present disclosure, at least one of the plurality of laser obstructions is a fixed laser obstruction installed on the steel arch installer, and the laser obstructions installed on the steel arch installer are movable laser obstructions installed on the steel arch already assembled.

[0052] wherein, referring to Figure 2 The base of the movable laser shield is adsorbed on the inner wall of the completed assembled steel arch by a magnet. The fixed laser shield is mounted on the structure of the steel arch installer and is fixed on the steel arch installer and cannot be moved.

[0053] The plurality of laser range finders are mounted on the fixed surface at the front end of the tunnel boring machine. The first laser range finders of the pair of fixed laser shields and the second laser range finders of the pair of movable laser shields are vertically symmetrical about the central axis on the fixed surface.

[0054] In the embodiments of the present disclosure, before positioning the steel arch each time, the distance between the measuring surface of the movable laser shield and the edge of the inner wall of the completed assembled steel arch near the steel arch installer needs to be measured and recorded.

[0055] The programmable controller is used to control the extension of the hydraulic cylinder of the steel arch installer to control the movement of the steel arch installer. The stroke value of the stroke sensor mounted on the hydraulic cylinder is read during the movement, and the stroke value is taken as the extension amount of the hydraulic cylinder.

[0056] The first laser range finder is used to measure the distance from the first laser range finder to the corresponding fixed laser shield during movement. The second laser range finder is used to measure the distance from the second laser range finder to the corresponding movable laser shield during movement.

[0057] The upper computer is used to:

[0058] According to the distance from the first laser range finder to the corresponding fixed laser shield, a first distance is obtained. According to the distance from the second laser range finder to the corresponding movable laser shield, a second distance is obtained.

[0059] It can be understood that if the first laser range finder is multiple, the first distance is the average value of the distances from the multiple first laser range finders to the corresponding fixed laser shields. Similarly, if the second laser range finder is multiple, the second distance is the average value of the distances from the multiple second laser range finders to the corresponding movable laser shields.

[0060] The host computer communicates with the programmable logic controller (PLC) in real time, reads the extension amount of the hydraulic cylinder, communicates with the communication control box, and the communication control box communicates with each laser range finder respectively. The host computer controls the opening and closing of the laser range finder by communicating with the communication control box, reads the distance between the laser range finder and the fixed laser shield installed on the steel arch installation device, and the distance between the laser range finder and the movable laser shield installed on the completed steel arch, averages the distances between the multiple laser range finders and the fixed laser shield to obtain a first distance, and averages the distances between the multiple laser range finders and the movable laser shield to obtain a second distance.

[0061] A third distance between a measuring surface of the movable laser shield and an edge of an inner wall of a completed steel arch close to the steel arch installation device is obtained.

[0062] A fourth distance between a measuring surface of the fixed laser shield and an edge of an inner wall of a steel arch to be assembled close to the front end of the shield tunneling machine close to the corresponding first laser range finder is obtained.

[0063] Whether the steel arch installation device is moved to the position is determined according to the first distance, the second distance, the third distance, the fourth distance, and a preset steel arch spacing.

[0064] In a case where it is determined that the steel arch installation device is moved to the position, the hydraulic cylinder is controlled to stop extension, and the steel arch installation device is controlled to assemble the steel arch to be assembled carried.

[0065] The above technical solution obtains the first distance according to the distance from the first laser range finder to the corresponding fixed laser shield, obtains the second distance according to the distance from the second laser range finder to the corresponding movable laser shield, obtains the third distance between the measuring surface of the movable laser shield and the edge of the inner wall of the completed steel arch close to the steel arch installation device, obtains the fourth distance between the measuring surface of the fixed laser shield and the edge of the inner wall of the steel arch to be assembled close to the front end of the shield tunneling machine close to the corresponding first laser range finder, determines whether the steel arch installation device is moved to the position according to the first distance, the second distance, the third distance, the fourth distance, and the preset steel arch spacing, controls the hydraulic cylinder to stop extension in a case where it is determined that the steel arch installation device is moved to the position, and controls the steel arch installation device to assemble the steel arch to be assembled carried. Therefore, the accuracy of the steel arch installation of the tunnel boring machine is improved, and the accuracy, reliability, and safety of the tunnel construction are improved.

[0066] In a preferred embodiment, the installation of each movable laser shield satisfies the following conditions:

[0067] The first side in the base of the movable laser shield parallel to the measuring surface of the movable laser shield coincides with the edge closest to the inner wall of the completed assembled steel arch of the steel arch mounting device, and the second side in the base of the movable laser shield parallel to the measuring surface of the movable laser shield is in the range closest to the inner wall of the completed assembled steel arch of the steel arch mounting device, and the first side and the second side are non-adjacent sides.

[0068] In a preferred embodiment, the host computer is configured to:

[0069] obtain the fifth distance from the second laser range finder to the corresponding movable laser shield when the steel arch mounting device clamps and fully expands the steel arch to be assembled, and the sixth distance from the first laser range finder to the corresponding fixed laser shield when the steel arch mounting device clamps and fully expands the steel arch to be assembled.

[0070] In a preferred embodiment, the host computer is configured to:

[0071] In the case where the steel arch mounting device clamps and fully expands the steel arch to be assembled, the fourth distance from the measuring surface of the fixed laser shield to the edge of the inner wall of the steel arch to be assembled close to the front end of the shield tunneling machine is determined according to the third distance, the fifth distance and the sixth distance.

[0072] In a preferred embodiment, the host computer is configured to:

[0073] The sum of the third distance and the fifth distance is calculated.

[0074] The difference between the sum and the sixth distance is taken as the fourth distance from the measuring surface of the fixed laser shield to the edge of the inner wall of the steel arch to be assembled close to the front end of the shield tunneling machine.

[0075] In a preferred embodiment, the host computer is configured to:

[0076] The sum of the second distance and the third distance is calculated to obtain a first sum, and

[0077] The sum of the first distance and the fourth distance is calculated to obtain a second sum.

[0078] According to whether the difference between the first sum and the second sum is equal to the preset steel arch spacing, it is determined whether the steel arch mounting device is moved into position.

[0079] According to the sum distance difference value of the first sum and the second sum, the extension speed of the extension of the hydraulic cylinder is controlled, wherein the extension speed is positively correlated with the sum distance difference value.

[0080] For example, if the sum distance difference value is large, the extension and retraction speed of the hydraulic cylinder is fast, if the sum distance difference value is small, the extension and retraction speed of the hydraulic cylinder is slow, which facilitates the adjustment of the position of the steel arch installation device and the steel arch to be assembled.

[0081] In a preferred embodiment, the installation height of the first laser range finder is consistent with the height of the corresponding fixed laser shield, so that the laser emitted by the first laser range finder is perpendicular to the measurement surface of the corresponding fixed laser shield.

[0082] The installation height of the second laser range finder is consistent with the height of the corresponding movable laser shield, so that the laser emitted by the second laser range finder is perpendicular to the measurement surface of the corresponding movable laser shield.

[0083] In a preferred embodiment, the first laser range finder and the fixed laser shield are both multiple, and the upper computer is used for:

[0084] The average value of the distance from each first laser range finder to the corresponding fixed laser shield is calculated to obtain the first distance.

[0085] In a preferred embodiment, the second laser range finder and the movable laser shield are both multiple, and the upper computer is used for:

[0086] The average value of the distance from each second laser range finder to the corresponding movable laser shield is calculated to obtain the second distance.

[0087] The embodiments of the present disclosure also provide a tunnel boring machine steel arch installation method, which is executed by the upper computer in the tunnel boring machine steel arch installation system of any one of the preceding embodiments.

[0088] Referring to Figure 3 The tunnel boring machine steel arch installation method comprises:

[0089] Step S31, obtaining a first distance according to the distance from the first laser range finder to the corresponding fixed laser shield, and obtaining a second distance according to the distance from the second laser range finder to the corresponding movable laser shield.

[0090] Step S32, obtaining a third distance between the measurement surface of the movable laser shield and the edge of the inner wall of the completed assembled steel arch close to the steel arch installation device.

[0091] Step S33, a fourth distance between the measuring surface of the fixed laser shield and the edge of the inner wall of the steel arch to be assembled close to the front end of the shield tunneling machine is obtained.

[0092] Step S34, whether the steel arch installer is moved to the position is determined according to the first distance, the second distance, the third distance, the fourth distance and the preset steel arch spacing.

[0093] Step S35, in the case that the steel arch installer is determined to be moved to the position, the hydraulic cylinder is controlled to stop extending, and the steel arch installer is controlled to assemble the steel arch to be assembled.

[0094] The above technical scheme obtains the first distance according to the distance between the first laser range finder and the corresponding fixed laser shield, obtains the second distance according to the distance between the second laser range finder and the corresponding movable laser shield, obtains the third distance between the measuring surface of the movable laser shield and the edge of the inner wall of the completed assembled steel arch close to the steel arch installer, obtains the fourth distance between the measuring surface of the fixed laser shield and the edge of the inner wall of the steel arch to be assembled close to the corresponding first laser range finder, determines whether the steel arch installer is moved to the position according to the first distance, the second distance, the third distance, the fourth distance and the preset steel arch spacing, and controls the hydraulic cylinder to stop extending and controls the steel arch installer to assemble the steel arch to be assembled in the case that the steel arch installer is determined to be moved to the position. Thus, the accuracy of the steel arch installation of the tunnel boring machine is improved, and the accuracy, reliability and safety of the tunnel construction are improved.

[0095] In an embodiment, the installation of each movable laser shield satisfies the following conditions:

[0096] The first edge parallel to the measuring surface of the movable laser shield in the base of the movable laser shield coincides with the edge of the inner wall of the completed assembled steel arch closest to the steel arch installer, and the second edge parallel to the measuring surface of the movable laser shield in the base of the movable laser shield is in the range of the inner wall of the completed assembled steel arch closest to the steel arch installer, and the first edge and the second edge are non-adjacent edges.

[0097] Referring to Figure 4 The tunnel boring machine steel arch installation method further comprises:

[0098] In step S41, a fifth distance between the second laser range finder and the corresponding movable laser shield when the steel arch installer clamps and completely expands the steel arch to be assembled is obtained by the second laser range finder, and a sixth distance between the first laser range finder and the corresponding fixed laser shield when the steel arch installer clamps and completely expands the steel arch to be assembled is obtained by the first laser range finder.

[0099] In step S42, a sum of the third distance and the fifth distance is calculated, and a difference between the sum and the sixth distance is taken as the fourth distance of the measuring surface of the fixed laser screen closer to the edge of the inner wall of the steel arch to be assembled near the front end of the shield tunneling machine.

[0100] In an embodiment, step S33 of acquiring the fourth distance of the measuring surface of the fixed laser screen closer to the edge of the inner wall of the steel arch to be assembled near the front end of the shield tunneling machine corresponding to the first laser range finder comprises:

[0101] In the case that the steel arch installer clamps and fully expands the steel arch to be assembled, the fourth distance of the measuring surface of the fixed laser screen closer to the edge of the inner wall of the steel arch to be assembled near the front end of the shield tunneling machine corresponding to the first laser range finder is determined according to the third distance, the fifth distance and the sixth distance.

[0102] In an embodiment, the fourth distance of the measuring surface of the fixed laser screen closer to the edge of the inner wall of the steel arch to be assembled near the front end of the shield tunneling machine corresponding to the first laser range finder is determined according to the third distance, the fifth distance and the sixth distance, comprising:

[0103] A sum of the third distance and the fifth distance is calculated.

[0104] A difference between the sum and the sixth distance is taken as the fourth distance of the measuring surface of the fixed laser screen closer to the edge of the inner wall of the steel arch to be assembled near the front end of the shield tunneling machine corresponding to the first laser range finder.

[0105] In an embodiment, step S34 of determining whether the steel arch installer is moved into position according to the first distance, the second distance, the third distance, the fourth distance and a preset steel arch spacing comprises:

[0106] A sum of the second distance and the third distance is calculated to obtain a first sum; and

[0107] A sum of the first distance and the fourth distance is calculated to obtain a second sum.

[0108] Whether the steel arch installer is moved into position is determined according to whether a difference between the first sum and the second sum is equal to the preset steel arch spacing.

[0109] An extension speed of the extension of the hydraulic cylinder is controlled according to a sum distance difference of the first sum and the second sum, wherein the extension speed is positively correlated with the sum distance difference.

[0110] In an embodiment, the installation height of the first laser range finder is consistent with the height of the corresponding fixed laser shelter, so that the laser emitted by the first laser range finder is perpendicular to the measurement surface of the corresponding fixed laser shelter.

[0111] The installation height of the second laser range finder is consistent with the height of the corresponding movable laser shelter, so that the laser emitted by the second laser range finder is perpendicular to the measurement surface of the corresponding movable laser shelter.

[0112] In an embodiment, the first laser range finder and the fixed laser shelter are both multiple, and the step S31 of obtaining the first distance according to the distance from the first laser range finder to the corresponding fixed laser shelter comprises:

[0113] The average value of the distance from each first laser range finder to the corresponding fixed laser shelter is calculated to obtain the first distance.

[0114] In an embodiment, the second laser range finder and the movable laser shelter are both multiple, and the step S31 of obtaining the second distance according to the distance from the second laser range finder to the corresponding movable laser shelter comprises:

[0115] The average value of the distance from each second laser range finder to the corresponding movable laser shelter is calculated to obtain the second distance.

[0116] Other embodiments of the present disclosure will be apparent to those skilled in the art from consideration of the specification and practice of the present disclosure. The present disclosure is intended to cover any variations, uses, or adaptations of the present disclosure following the general principles thereof and including such departures from the present disclosure that come within known, accepted, or customary practice in the art to which the present disclosure pertains. The specification and examples are to be regarded as illustrative only, and the true scope and spirit of the present disclosure are indicated by the following claims.

[0117] It should be understood that the present disclosure is not limited to the precise construction that has been described above and shown in the accompanying drawings, and that various modifications and changes can be made by those skilled in the art without departing from the scope of the present disclosure. The scope of the present disclosure is limited only by the appended claims.

Claims

1. A tunnel boring machine steel arch installation system, characterized by, The steel arch installation device, a host computer, a plurality of laser range finders in communication connection with the host computer, a plurality of laser shields, and a programmable controller are included. At least one of the plurality of laser shields is used as a fixed laser shield and is installed on the steel arch installation device. The plurality of laser range finders are installed on a fixed surface at the front end of the tunnel boring machine. The programmable controller is used to control the extension of the hydraulic cylinder of the steel arch installation device to control the movement of the steel arch installation device. The first laser range finder is used to measure the distance from the first laser range finder to the corresponding fixed laser shield during movement. The second laser range finder is used to measure the distance from the second laser range finder to the corresponding movable laser shield during movement. The host computer is used to: obtain a first distance according to the distance from the first laser range finder to the corresponding fixed laser shield and a second distance according to the distance from the second laser range finder to the corresponding movable laser shield; obtain a third distance between the measurement surface of the movable laser shield and the edge of the inner wall of the completed assembled steel arch near the steel arch installation device; obtain a fourth distance between the measurement surface of the fixed laser shield and the edge of the inner wall of the to-be-assembled steel arch near the corresponding first laser range finder near the front end of the shield machine; determine whether the steel arch installation device is moved into position according to the first distance, the second distance, the third distance, the fourth distance, and a preset steel arch spacing; control the hydraulic cylinder to stop extending and control the steel arch installation device to assemble the to-be-assembled steel arch carried by the steel arch installation device when it is determined that the steel arch installation device is moved into position.

2. The tunnel boring machine steel arch installation system of claim 1, wherein, The installation of each movable laser shield satisfies the following conditions: the first edge of the base of the movable laser shield, which is parallel to the measurement surface of the movable laser shield, coincides with the edge of the inner wall of the completed assembled steel arch closest to the steel arch installation device, and the second edge of the base of the movable laser shield, which is parallel to the measurement surface of the movable laser shield, is in the range of the inner wall of the completed assembled steel arch closest to the steel arch installation device, and the first edge and the second edge are non-adjacent edges.

3. The tunnel boring machine steel arch installation system of claim 1, wherein, The host computer is used to: acquire a fifth distance from the second laser range finder to the corresponding movable laser shield when the steel arch installation device clamps and fully expands the steel arch to be assembled, and a sixth distance from the first laser range finder to the corresponding fixed laser shield when the steel arch installation device clamps and fully expands the steel arch to be assembled.

4. The tunnel boring machine steel arch installation system of claim 3, wherein, The host computer is configured to: In the case that the steel arch installation device clamps and fully expands the steel arch to be assembled, determine a fourth distance from a measuring surface of the fixed laser shield to an edge of an inner wall of the steel arch to be assembled close to the front end of the shield tunneling machine according to the third distance, the fifth distance, and the sixth distance.

5. The tunnel boring machine steel arch installation system of claim 4, wherein, The host computer is configured to: Calculate a sum of the third distance and the fifth distance; Take a difference between the sum and the sixth distance as the fourth distance from the measuring surface of the fixed laser shield to the edge of the inner wall of the steel arch to be assembled close to the front end of the shield tunneling machine.

6. The tunnel boring machine steel arch installation system of claim 1, wherein, The host computer is configured to: Calculate a sum of the second distance and the third distance to obtain a first sum; and Calculate a sum of the first distance and the fourth distance to obtain a second sum; Determine whether the steel arch installation device is moved into position according to whether a difference between the first sum and the second sum is equal to the preset steel arch spacing; Control an extension speed of the hydraulic cylinder according to a sum distance difference between the first sum and the second sum, wherein the extension speed is positively correlated with the sum distance difference.

7. The tunnel boring machine steel arch installation system of claim 1, wherein, The installation height of the first laser range finder is consistent with the height of the corresponding fixed laser shield, so that the laser emitted by the first laser range finder is perpendicular to the measuring surface of the corresponding fixed laser shield; The installation height of the second laser range finder is consistent with the height of the corresponding movable laser shield, so that the laser emitted by the second laser range finder is perpendicular to the measuring surface of the corresponding movable laser shield.

8. The tunnel boring machine steel arch installation system of any one of claims 1-7, wherein, The first laser range finder and the fixed laser shield are both multiple, and the host computer is configured to: Calculate an average of distances from each of the first laser range finders to the corresponding fixed laser shields to obtain the first distance.

9. The tunnel boring machine steel arch installation system of any one of claims 1-7, wherein, The second laser range finder and the movable laser shield are both multiple, and the host computer is configured to: Calculate an average of distances from each of the second laser range finders to the corresponding movable laser shields to obtain the second distance.

10. A method of installing a steel arch for a tunnel boring machine, characterized in that, The host computer in the tunnel boring machine steel arch installation system of any one of claims 1-9 is executed.

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