Tunnel secondary lining steel bar mechanized construction device and construction method

Abstract

The application relates to a tunnel secondary lining steel bar mechanized construction device and a construction method, and relates to the technical field of tunnel construction. The device comprises an auxiliary trolley and a main trolley. The auxiliary trolley is provided with a first arc-shaped track, a longitudinal steel bar lifting mechanism is slidably arranged on the first arc-shaped track, a longitudinal steel bar truss structure is arranged between the longitudinal steel bar lifting mechanisms, a longitudinal steel bar translation mechanism is slidably arranged on the longitudinal steel bar truss structure, and the auxiliary trolley is provided with a steel bar grid lifting mechanism. The main trolley is provided with a second arc-shaped track, arc-shaped trolleys are slidably arranged on the two second arc-shaped tracks, a longitudinal track is arranged between the arc-shaped trolleys, a longitudinal moving trolley is arranged on the longitudinal track, and a steel bar binding mechanism is arranged on the longitudinal moving trolley. The main trolley is provided with a steel bar grid translation positioning mechanism. The application can realize the mechanized construction of secondary lining circumferential steel bars, longitudinal steel bars, stirrups and steel bar binding in a tunnel hole, and can significantly improve the mechanized construction level of tunnel secondary lining steel bars.

Description

Technical Field

[0001] This invention relates to the field of tunnel construction technology, specifically to a mechanized construction device and method for tunnel secondary lining reinforcement. Background Technology

[0002] In the construction of mined tunnels, after tunnel excavation, initial support, and the laying of waterproofing membrane, reinforced concrete or plain concrete secondary lining is required. For reinforced concrete secondary lining, secondary lining reinforcement needs to be tied or installed. For a long time, tunnel secondary lining reinforcement has been installed manually. Due to the large number and length of ring and longitudinal reinforcement bars, a large number of workers are needed, resulting in high labor intensity, low efficiency, and significant construction safety issues. During reinforcement installation, the reinforcement bars are prone to damaging the waterproofing layer, the spacing between bars is difficult to control, and the bars are easily deformed, thus affecting the quality of reinforcement construction. With the development of industrialization, the requirements for safety, quality, and progress in tunnel construction are constantly increasing. Traditional reinforcement tying and installation operations can no longer meet the requirements of modern construction, and there is an urgent need to mechanize secondary lining reinforcement installation. Especially for railway and highway tunnels built in large numbers in high-altitude areas, manual installation of secondary lining reinforcement becomes extremely difficult and inefficient under the hypoxic conditions of high altitudes. Therefore, it is imperative to mechanize tunnel secondary lining reinforcement installation operations to reduce manpower and lower the labor intensity of workers.

[0003] The installation of secondary lining reinforcement in tunnels includes: inner and outer circumferential reinforcement, inner and outer longitudinal reinforcement, and stirrups or tie bars between the inner and outer layers of reinforcement; the circumferential and longitudinal reinforcement and tie bars are bound together with wire. Currently, commonly used tunnel reinforcement trolleys do not have the function of mechanized installation of secondary lining reinforcement. The published invention patent CN116378713 A discloses a "rapid construction device and method for tunnel arch wall lining reinforcement," which, by setting up circumferential forming components and positioning support components, eliminates the need for workers to lift and tie the circumferential reinforcement one by one during connection. However, the longitudinal reinforcement, tie bars, and reinforcement binding still require manual installation, especially since the number of longitudinal reinforcement and tie bars is large, resulting in low binding and fixing efficiency, and the degree of mechanization needs to be greatly improved. In existing technologies, secondary lining reinforcement uses plate-type reinforcement (with tie bars between the inner and outer layers of reinforcement), which limits the significant improvement of the mechanization level of secondary lining reinforcement. Summary of the Invention

[0004] The purpose of this invention is to address the shortcomings of existing testing equipment by providing a mechanized construction device and method for tunnel secondary lining reinforcement, which enables mechanized construction of secondary lining circumferential reinforcement, longitudinal reinforcement, stirrups, and reinforcement binding inside the tunnel, significantly improving the level of mechanized construction of tunnel secondary lining reinforcement.

[0005] To achieve the above objectives, the present invention provides a mechanized construction device for secondary lining reinforcement of tunnels, comprising: an auxiliary trolley and a main trolley, wherein the auxiliary trolley is disposed on one side of the main trolley; The auxiliary trolley is equipped with a first arc-shaped track at both the front and rear ends. A longitudinal steel bar lifting mechanism is slidably arranged on both first arc-shaped tracks. A longitudinal steel bar truss structure is erected between the two longitudinal steel bar lifting mechanisms. A longitudinal steel bar translation mechanism is slidably arranged on the longitudinal steel bar truss structure. A steel bar grid lifting mechanism is also installed at the rear end of the auxiliary trolley. The main trolley is equipped with a second arc-shaped track at both its front and rear ends. Arc-shaped trolleys are slidably mounted on both second arc-shaped tracks. A longitudinal track is erected between the two arc-shaped trolleys. A longitudinal moving trolley is mounted on the longitudinal track. A steel bar binding mechanism is mounted on the longitudinal moving trolley. A steel bar grid translation and positioning mechanism is mounted on the top of the main trolley.

[0006] Furthermore, a steel bar grid shape retainer is mounted on the top of the main trolley to support the steel bar grid.

[0007] Furthermore, the bottom two sides of the steel bar grid shape retainer are made of curved steel, and the two sides are truss structures welded from steel. The two bottom steel sections are connected longitudinally with steel bars.

[0008] Furthermore, the steel bar grid translation and positioning mechanism is provided with two independent columns, including a translation mechanism and a lifting platform, with the translation mechanism located at the top of the lifting platform.

[0009] Furthermore, the translation mechanism includes a chain drive mechanism and a clamp. The clamp includes a bottom slide rail bracket, a rotating frame, and multiple vertical telescopic rods. The bottom slide rail bracket is connected to the drive chain of the chain drive mechanism, and the bottom of the bottom slide rail bracket is slidably connected to a groove opened on the lifting platform. The rotating frame is installed on the top of the bottom slide rail bracket, and multiple vertical telescopic rods are installed on the rotating frame.

[0010] A mechanized construction method for tunnel secondary lining reinforcement includes: Two inner and two outer circumferential main bars and stirrups are used to form a steel grid, which is prefabricated outside the tunnel. After being transported into the tunnel, it is lifted to the top of the tunnel by the lifting mechanism at the rear of the auxiliary trolley and placed above the grid translation and positioning mechanism. The grid is kept from deformation by the grid shape retainer. It is then translated and lifted to the installation position by the translation and positioning mechanism above the main trolley. The steel grids are installed one by one on the main trolley. The longitudinal bars are placed in the longitudinal bar lifting mechanism outside the auxiliary trolley and transported to the designated position along the first arc track. The longitudinal bars are inserted into the inside of the installed steel grid by the longitudinal bar translation mechanism outside the auxiliary trolley. The longitudinal bar translation mechanism is gradually moved out longitudinally, and at the same time, the longitudinally movable bar binding machine is used to bind the intersection points of the bars.

[0011] Furthermore, 2-3 lifting rings are accurately marked on the steel bar grid in advance. The rope hooks under 2-3 sets of pulleys of the steel bar grid lifting mechanism hook the grid lifting rings and use the pulleys to lift the steel bar grid to the top of the tunnel. Alternatively, a mechanical arm can be used to lift the steel bar grid to the top of the tunnel and place it above the grid translation and positioning mechanism. The grid shape retainer keeps the grid from deforming.

[0012] Furthermore, the two clamps of the grid translation and positioning mechanism on the top of the main trolley clamp the steel grid. The clamps move on the track of the translation mechanism to transport the steel grid to the designated position. Then, the steel grid is positioned and lifted to the installation position by the rotating frame and multiple vertical telescopic rods at the bottom of the clamps. The main reinforcement of the steel grid is connected to the reserved reinforcement of the invert arch using a sleeve. The steel grid is then installed piece by piece on the main trolley.

[0013] The beneficial effects of this invention are as follows: 1) By changing the tunnel secondary lining reinforcement to beam-type reinforcement, mechanized installation of secondary lining reinforcement can be achieved inside the tunnel through the assembly of individual lattice steel frames and longitudinal reinforcing bars. This includes inner and outer circumferential reinforcement, inner and outer longitudinal reinforcement, stirrups, and reinforcement binding, significantly improving the level of mechanized construction of tunnel secondary lining reinforcement. This not only reduces labor costs but also greatly improves reinforcement installation efficiency, accelerates construction progress, significantly reduces labor intensity, and enhances construction safety, resulting in high economic and social benefits.

[0014] 2) In this invention, the circumferential main reinforcement forms an integral grid steel frame and is prefabricated mechanically outside the tunnel. This enables precise control of the spacing between the inner and outer layers of reinforcement, improves the overall deformation problem of the lining reinforcement, avoids damage to the waterproof layer by the reinforcement, and thus greatly improves the construction quality of tunnel reinforcement installation. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the auxiliary trolley of the present invention; Figure 2 This is a schematic diagram of the main trolley of the present invention; Figure 3 This is a cross-sectional schematic diagram of the auxiliary trolley of the present invention; Figure 4 This is a longitudinal section schematic diagram of the auxiliary trolley of the present invention; Figure 5 This is a cross-sectional schematic diagram of the main trolley of the present invention; Figure 6 This is a longitudinal cross-sectional schematic diagram of the main trolley of the present invention; Figure 7 This is a top view of the steel bar grid translation and positioning mechanism of the present invention; Figure 8 This is a schematic diagram of the rebar tying mechanism of the present invention.

[0016] In the figure: 100. Auxiliary trolley; 200. Main trolley; 1. Rebar grid; 2. Rebar grid shape retainer; 3. Rebar grid translation and positioning mechanism; 4. Arc-shaped track; 5. Rebar binding mechanism; 6. Longitudinal track; 7. Arc-shaped track chain drive device; 8. Rebar grid lifting mechanism; 9. Longitudinal rebar lifting mechanism; 10. Longitudinal rebar truss structure; 11. Longitudinal rebar translation mechanism; 12. First arc-shaped track; 13. Second arc-shaped track; 11.1. Two-sided clamping mechanism; 11.2. Bottom wheel-rail moving mechanism; 3.2. Chain drive mechanism; 3.1. Fixture. Detailed Implementation

[0017] The technical solutions in the embodiments of the present invention will be clearly and completely described below. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0018] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate for the embodiments of this application described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0019] In this application, the terms "upper," "lower," "left," "right," "front," "rear," "top," "bottom," "inner," "outer," "middle," "vertical," "horizontal," "lateral," and "longitudinal" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. These terms are primarily for the purpose of better describing this application and its embodiments, and are not intended to limit the indicated device, element, or component to having a specific orientation, or to be constructed and operated in a specific orientation.

[0020] Furthermore, in addition to indicating location or positional relationship, some of the aforementioned terms may also have other meanings. For example, the term "above" may also be used in some cases to indicate a certain dependency or connection relationship. Those skilled in the art can understand the specific meaning of these terms in this application based on the specific circumstances.

[0021] Furthermore, the terms "installation," "setup," "equipped with," "connection," "linking," and "socketing" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral structure; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium, or an internal connection between two devices, components, or parts. Those skilled in the art can understand the specific meaning of these terms in this application based on the specific circumstances.

[0022] like Figure 1-8 As shown, the present invention provides a mechanized construction device for secondary lining reinforcement of tunnels, comprising: an auxiliary trolley 100 and a main trolley 200, wherein the auxiliary trolley 100 is disposed on one side of the main trolley 200; The auxiliary trolley is equipped with a first arc-shaped track 12 at both the front and rear ends. A longitudinal steel bar lifting mechanism 9 is slidably arranged on both first arc-shaped tracks 12. A longitudinal steel bar truss structure 10 is erected between the two longitudinal steel bar lifting mechanisms 9. A longitudinal steel bar translation mechanism 11 is slidably arranged on the longitudinal steel bar truss structure 10. A steel bar grid lifting mechanism 8 is also installed at the rear end of the auxiliary trolley. The main trolley is equipped with second arc-shaped tracks 13 at both its front and rear ends. Arc-shaped trolleys are slidably mounted on both second arc-shaped tracks 13. A longitudinal track 6 is erected between the two arc-shaped trolleys, and a longitudinal moving trolley is mounted on the longitudinal track 6. A steel bar binding mechanism 5 is mounted on the longitudinal moving trolley. A steel bar grid translation and positioning mechanism 3 is mounted on the top of the main trolley. The first arc-shaped track 12 has a larger radius than the second arc-shaped track 13 of the main trolley.

[0023] To ensure that the reinforcing bar grid 1 does not deform during translation and positioning, this invention designs a reinforcing bar grid shape retainer 2. The reinforcing bar grid shape retainer 2 is mounted on the top of the main trolley to support the reinforcing bar grid 1. The bottom two sides of the reinforcing bar grid shape retainer 2 are made of steel profiles processed into arc shapes, and the two sides are truss structures welded from steel profiles. The two bottom steel profiles are connected longitudinally with reinforcing bars.

[0024] In this embodiment, the rebar grid translation and positioning mechanism 3 is provided with two independent rows, including a translation mechanism and a lifting platform. The translation mechanism is located at the top of the lifting platform. The translation mechanism includes a chain drive mechanism 3.2 and a clamp 3.1. The clamp 3.1 includes a bottom slide rail bracket, a rotating frame, and multiple vertical telescopic rods. The bottom slide rail bracket is connected to the drive chain of the chain drive mechanism 3.2, and the bottom of the bottom slide rail bracket is slidably connected to a groove opened on the lifting platform, allowing the translation mechanism to extend out of the front end of the main trolley. The rotating frame is installed at the top of the bottom slide rail bracket, and multiple vertical telescopic rods are installed on the rotating frame. Each telescopic rod has a rubber sleeve around its periphery. The number of vertical telescopic rods can be four, six, etc.

[0025] In addition to its basic self-propelled function, the auxiliary trolley is equipped with a longitudinal rebar lifting mechanism 9, which is a method for feeding ring bars and stirrups according to the present invention. A pulley system is used to lift the prefabricated rebar grid 1 to a certain height and place it within the grid shape retainer at the extended end of the aforementioned rebar grid translation and positioning mechanism 3, further translating and positioning the rebar grid 1.

[0026] This invention provides a rebar binding function after the rebar placement and positioning process. The rebar binding mechanism 5 consists of a matching rebar binding machine and related control components. After the longitudinal rebar is inserted, the rebar binding mechanism 5 binds the rebar at the intersection of the longitudinal and circumferential rebars. The movement of the rebar binding machine on the rebar binding mechanism 5 is achieved by dragging the arc-shaped trolley on the second arc-shaped track 13 and the longitudinal moving trolley on the longitudinal track 6, thereby completing the rebar binding work on the entire arc surface. The rebar binding mechanism 5 is located on the longitudinal moving trolley, which moves back and forth along the longitudinal track 6. The longitudinal track 6 is fixed on the arc-shaped trolleys at both ends, and the arc-shaped trolleys at both ends are driven by the arc-shaped track chain drive device 7 to move synchronously on the front and rear arc-shaped tracks 4 respectively.

[0027] The longitudinal rebar lifting mechanism and the longitudinal rebar translation mechanism can be integrated into one large component. The longitudinal track of the auxiliary trolley includes a sliding trolley and a fixed trolley, respectively arranged at the front and rear ends of the longitudinal track. The front sliding trolley includes two side clamping mechanisms 11.1 and a bottom wheel-rail moving mechanism 11.2, which can reciprocate along the longitudinal track. The rear trolley has two side clamping mechanisms 11.1 on both sides and a roller at the bottom. The longitudinal rebar truss structure can move on the longitudinal track; the lower part of the rear trolley and the lower part of the front end of the longitudinal track are equipped with arc-shaped sliding trolleys, which can move along the arc-shaped track in the same way as the arc-shaped track chain drive device 7 of the main trolley. When the longitudinal rebar is inserted into the rebar grid, necessary fixing measures need to be taken for the installed rebar grid.

[0028] This invention also provides a mechanized construction method for tunnel secondary lining reinforcement, comprising: prefabricating a steel grid by assembling two inner and two outer circumferential main bars and stirrups outside the tunnel; transporting it to the tunnel; lifting it to the top of the tunnel via a lifting mechanism at the rear of an auxiliary trolley; placing it above a grid translation and positioning mechanism; maintaining the grid's shape by a grid shape retainer; translating and lifting it to the installation position via a translation and positioning mechanism above the main trolley; installing the steel grids one by one on the main trolley; placing longitudinal reinforcement bars in a longitudinal reinforcement lifting mechanism outside the auxiliary trolley; transporting it to a designated position along a first arc track; inserting the longitudinal reinforcement bars into the installed steel grid via a longitudinal reinforcement translation mechanism outside the auxiliary trolley; the longitudinal reinforcement translation mechanism gradually moving out longitudinally; and simultaneously using a longitudinally movable reinforcement binding machine to bind the intersection points of the reinforcement bars.

[0029] In this invention, 2-3 lifting rings are accurately marked on the reinforcing grating beforehand. The rope hooks below 2-3 sets of pulleys in the reinforcing grating lifting mechanism hook onto the grating rings, and the pulleys lift the reinforcing grating to the top of the tunnel. Alternatively, a robotic arm can be used to lift the reinforcing grating to the top of the tunnel, place it above the grating translation and positioning mechanism, and maintain its shape using a grating shape retainer to prevent deformation. The reinforcing grating consists of two inner and outer circumferential main bars and shaped stirrups (closed or open stirrups) at certain intervals, and is prefabricated outside the tunnel. During prefabrication, the joints can be tied or welded. During prefabrication, a single reinforcing grating can be divided into 2-3 sections, transported to the front of the main trolley, and connected to each section using a connector.

[0030] Furthermore, the two clamps of the grid translation and positioning mechanism on the top of the main trolley clamp the steel grid. The clamps move on the track of the translation mechanism to transport the steel grid to the designated position. Then, the steel grid is positioned and lifted to the installation position by the rotating frame and multiple vertical telescopic rods at the bottom of the clamps. The main reinforcement of the steel grid is connected to the reserved reinforcement of the invert arch using a sleeve. The steel grid is then installed piece by piece on the main trolley.

[0031] This invention provides a mechanized construction method for tunnel secondary lining reinforcement, based on beam-type reinforcement of the secondary lining, specifically including the following steps: 1) A grid is formed by combining two circumferential main bars on the inside and outside and stirrups at a certain interval. The steel grid is mechanically processed outside the tunnel and then transported into the tunnel. 2) After the invert arch concrete is poured and reaches a certain strength, the steel reinforcement trolley moves along the track to the designated position; 3) Pre-mark 2-3 lifting rings on the steel grid. Hook the rope hooks under 2-3 sets of pulleys of the steel grid lifting mechanism onto the steel grid lifting rings. Use the pulleys to lift the steel grid to the top of the tunnel. Alternatively, a robotic arm can be used to lift the steel grid to the top of the tunnel and place it above the steel grid translation and positioning mechanism. The grid shape retainer will keep the grid from deforming. 4) The steel grid translation and positioning mechanism on the top of the main trolley clamps the steel grid. The clamp moves on the track and transports the steel grid to the designated position. Then, the steel grid is positioned and lifted to the installation position by the rotating frame and telescopic rod at the bottom of the clamp. The main reinforcement of the grid is connected to the reserved reinforcement of the invert arch by the sleeve manually. The steel grid is installed one by one on the main trolley. 5) Place the longitudinal steel bars in the groove of the truss beam of the longitudinal steel bar lifting mechanism of the auxiliary trolley, and transport the truss beam and longitudinal steel bars to the designated position along the first arc track; 6) The truss beam and longitudinal steel bars are inserted into the inner side of the steel bar grid along the longitudinal direction of the tunnel using the auxiliary trolley longitudinal steel bar translation mechanism. After reaching the designated position, the longitudinal steel bars are manually connected to the existing longitudinal steel bars of the previous formwork. 7) The auxiliary trolley longitudinal reinforcement translation mechanism gradually moves the truss beam out longitudinally. Each time the truss beam is moved out, a section of longitudinal reinforcement is exposed. A longitudinally movable reinforcement binding machine is used to bind the intersection of the longitudinal reinforcement and the transverse reinforcement with wire.

[0032] It should be noted that a robotic arm can be installed at the rear end of the auxiliary trolley to replace the pulley mechanism for lifting the rebar grid, thereby achieving precise control of the rebar grid trajectory and avoiding obstacles such as ventilation pipes, further improving the efficiency and safety of the rebar installation work.

[0033] It should be noted that the curved track of the auxiliary trolley is placed inside the secondary lining, and its height can be adjusted and positioned using the lifting cylinder at its bottom. Then, the longitudinal rib truss can be inserted into the internal space of the grid unit using the translation device.

[0034] It should be noted that the binding machine on the longitudinal track of the main trolley can be operated by a manual remote control, or it can be combined with machine vision to realize the automatic positioning and binding of the rebar binding machine.

[0035] It should be noted that when connecting with existing steel bars, mechanical sleeve connection can be used, or welding or binding connection can be used depending on the situation.

[0036] This invention modifies the secondary lining reinforcement of tunnels by replacing it with beam-type reinforcement. By assembling individual lattice steel frames and longitudinal reinforcing bars, mechanized installation of the secondary lining reinforcement can be completed inside the tunnel. This includes inner and outer circumferential reinforcement, inner and outer longitudinal reinforcement, stirrups, and reinforcement binding, significantly improving the level of mechanized construction of tunnel secondary lining reinforcement. It not only reduces labor costs but also greatly improves reinforcement installation efficiency, accelerates construction progress, significantly reduces labor intensity, and improves construction safety, resulting in high economic and social benefits. In this invention, the circumferential main reinforcement forms an integral lattice steel frame and is mechanizedly prefabricated outside the tunnel. This allows for precise control of the spacing between the inner and outer layers of reinforcement, improving the overall deformation problem of the lining reinforcement and preventing damage to the waterproof layer, thereby greatly improving the construction quality of tunnel reinforcement installation.

[0037] The above description is merely a preferred embodiment of the present invention and does not constitute any limitation on the technical scope of the present invention. Therefore, any minor modifications, equivalent changes, and alterations made to the above embodiments based on the technical essence of the present invention shall still fall within the scope of the technical solution of the present invention.

Claims

1. A mechanized construction device for tunnel secondary lining reinforcement, characterized in that, include: An auxiliary trolley and a main trolley, wherein the auxiliary trolley is located on one side of the main trolley; The auxiliary trolley is equipped with a first arc-shaped track at both the front and rear ends. A longitudinal steel bar lifting mechanism is slidably arranged on both first arc-shaped tracks. A longitudinal steel bar truss structure is erected between the two longitudinal steel bar lifting mechanisms. A longitudinal steel bar translation mechanism is slidably arranged on the longitudinal steel bar truss structure. A steel bar grid lifting mechanism is also installed at the rear end of the auxiliary trolley. The main trolley is equipped with a second arc-shaped track at both its front and rear ends. Arc-shaped trolleys are slidably mounted on both second arc-shaped tracks. A longitudinal track is erected between the two arc-shaped trolleys. A longitudinal moving trolley is mounted on the longitudinal track. A steel bar binding mechanism is mounted on the longitudinal moving trolley. A steel bar grid translation and positioning mechanism is mounted on the top of the main trolley. The main trolley is equipped with a steel bar grid shape retainer at the top to support the steel bar grid. The bottom two sides of the steel bar grid shape retainer are made of steel profiles processed into arc shapes, and the two sides are truss structures welded from steel profiles. The two bottom steel profiles are connected by steel bars in the longitudinal direction.

2. The mechanized construction device for tunnel secondary lining reinforcement as described in claim 1, characterized in that, The steel bar grid translation and positioning mechanism is provided with two independent columns, including a translation mechanism and a lifting platform, with the translation mechanism located at the top of the lifting platform.

3. The mechanized construction device for tunnel secondary lining reinforcement as described in claim 2, characterized in that, The translation mechanism includes a chain drive mechanism and a clamp. The clamp includes a bottom slide rail bracket, a rotating frame, and multiple vertical telescopic rods. The bottom slide rail bracket is connected to the drive chain of the chain drive mechanism, and the bottom of the bottom slide rail bracket is slidably connected to a groove opened on the lifting platform. The rotating frame is installed on the top of the bottom slide rail bracket, and multiple vertical telescopic rods are installed on the rotating frame.

4. The construction method of the mechanized construction device for tunnel secondary lining reinforcement according to claim 3, characterized in that, include: Two inner and two outer circumferential main bars and stirrups are used to form a steel grid, which is prefabricated outside the tunnel. After being transported into the tunnel, it is lifted to the top of the tunnel by the lifting mechanism at the rear of the auxiliary trolley and placed above the steel grid translation and positioning mechanism. The grid is kept from deformation by the steel grid shape retainer. It is then translated and lifted to the installation position by the translation and positioning mechanism above the main trolley. The steel grids are installed one by one on the main trolley. The longitudinal bars are placed in the longitudinal bar lifting mechanism outside the auxiliary trolley and transported to the designated position along the first arc track. The longitudinal bars are inserted into the inside of the installed steel grid by the longitudinal bar translation mechanism outside the auxiliary trolley. The longitudinal bar translation mechanism gradually moves out longitudinally, and at the same time, the longitudinally movable bar binding mechanism is used to bind the intersection points of the bars.

5. The construction method of the mechanized construction device for tunnel secondary lining reinforcement as described in claim 4, characterized in that, Two to three lifting rings are accurately marked on the steel grid beforehand. The rope hooks under the two to three sets of pulleys of the steel grid lifting mechanism hook the grid lifting rings. The pulleys are used to lift the steel grid to the top of the tunnel, or a mechanical arm is used to lift the steel grid to the top of the tunnel and place it above the steel grid translation and positioning mechanism. The steel grid is kept from deformation by the steel grid shape retainer.

6. The construction method of the mechanized construction device for tunnel secondary lining reinforcement as described in claim 4, characterized in that, The two clamps of the steel bar grid translation and positioning mechanism on the top of the main trolley clamp the steel bar grid. The clamps move on the track of the translation mechanism and transport the steel bar grid to the designated position. Then, the steel bar grid is positioned and lifted to the installation position by the rotating frame at the bottom of the clamps and multiple vertical telescopic rods. The main reinforcement of the steel bar grid is connected to the reserved reinforcement of the invert arch using a sleeve. The steel bar grid is then installed piece by piece on the main trolley.

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