Tunnel widening section lining construction trolley device

Abstract

The utility model relates to the technical field of tunnel lining construction equipment, in particular to a tunnel widening section lining construction trolley device which comprises an existing section trolley, the existing section trolley is provided with a trolley inner support, a moving device, a hydraulic telescopic rod and an existing inner arc-shaped panel, and the moving device is arranged at the bottom of the trolley inner support. The hydraulic telescopic rod is connected between the trolley inner support and the existing inner arc-shaped panel; on the basis of an existing section trolley, a radial supporting beam is arranged on the outer side of an existing inner arc-shaped panel of the existing section trolley to support an arch-shaped cross beam, so that the arch-shaped cross beam can support an outer arc-shaped panel on the outer side, and it is guaranteed that the outer arc-shaped panel is always matched with the arch shape of a tunnel widening section lining; according to the tunnel widening section lining trolley, pouring construction can be conducted on a tunnel widening section lining, the arch construction safety quality of the tunnel widening section lining can be guaranteed, and compared with a special widening section lining trolley, the construction cost of the tunnel widening section lining trolley is lower.

Description

Technical Field

[0001] The utility model relates to the technical field of tunnel lining construction equipment, in particular to a trolley device for tunnel widening section lining construction. Background Art

[0002] During the construction of the widening section lining of a large-section tunnel, the traditional construction method is to process and weld the gantry or customize a special widening section lining trolley. In the above construction methods, the processed and welded gantry is easy to deform, which makes it easy for concrete to be misaligned and invaded during construction, and the concrete construction cannot be effectively vibrated and grouted with the mold, resulting in the vault being hollowed out, making it difficult to ensure safety and quality; and the special widening section lining trolley has related problems such as high construction cost and unsuitability for variable-section lining. Utility Model Content

[0003] The utility model aims to overcome the shortcomings of the prior art in the process of widening section lining construction of large-section tunnels, that is, the existing processing and welding gantry is difficult to ensure the construction safety and quality, and the special widening section lining trolley has a high construction cost, and provides a tunnel widening section lining construction trolley device.

[0004] The utility model provides a trolley device for tunnel widening section lining construction, comprising an existing cross-section trolley, the existing cross-section trolley having a trolley inner support, a moving device, a hydraulic telescopic rod and an existing internal curved panel, the moving device is arranged at the bottom of the trolley inner support, the hydraulic telescopic rod is connected between the trolley inner support and the existing internal curved panel;

[0005] include

[0006] An external curved panel, which is arranged outside the existing internal curved panel and is an arched panel adapted to the lining of the widened section of the tunnel;

[0007] The outer supporting structure includes an arched crossbeam and a radial supporting beam. The outer side of the arched crossbeam is adapted to be supported on the inner side of the outer curved panel, and the radial supporting beam is connected between the arched crossbeam and the existing inner curved panel.

[0008] In this solution, the existing cross-section trolley is an existing technology trolley that can be used in tunnels, which can be used for tunnel lining construction of some sections. However, during the construction of the tunnel widening section lining, because the cross-section of the tunnel widening section is larger than the cross-section that the existing internal curved panel can support, the existing cross-section trolley cannot support the construction of the tunnel widening section lining. Based on the existing cross-section trolley, this solution sets a radial support beam to support the arched crossbeam on the outside of the existing internal curved panel of the existing cross-section trolley, so that the arched crossbeam can support the outer curved panel on the outside, ensuring that the outer curved panel always adapts to the arch of the tunnel widening section lining, so that the tunnel widening section lining can be cast and constructed, which can ensure the safety and quality of the arched construction of the tunnel widening section lining, and compared with the special widening section lining trolley, its construction cost is lower.

[0009] Preferably, one end of the radial support beam is welded to the inner side of the arched cross beam, and the other end is detachably connected to the outer side of the existing internal curved panel.

[0010] The radial support beam is welded to the inner side of the arched cross beam to form a whole, which has better supporting capacity for the external curved panel; the radial support beam is detachably connected to the outer side of the existing internal curved panel, which is convenient for installation and disassembly.

[0011] Preferably, an L-shaped fixing angle steel is provided at one end of the radial support beam close to the existing internal curved panel, the L-shaped fixing angle steel is provided with a first bolt hole, the existing internal curved panel is provided with a second bolt hole corresponding to the first bolt hole, and the L-shaped fixing angle steel and the existing internal curved panel are bolted together.

[0012] L-shaped fixed angle steel is used as a connecting piece to bolt the radial support beam and the existing internal curved panel, which has a simple structure and is easy to install.

[0013] Preferably, the radial support beam is a first I-beam member, the two flange plates of the first I-beam member are arranged opposite to each other in the circumferential direction, and the L-shaped fixed angle steel is welded to the corners in the groove of the first I-beam member, which can provide a larger welding area and a more secure connection.

[0014] Preferably, the second bolt holes are arranged at intervals of 1m-2m in the circumferential and axial directions along the existing internal curved panel, and the hole diameter of the second bolt holes is 16mm-22mm; that is, the first bolt holes are arranged at intervals of 1m-2m in the circumferential and axial directions, and the radial support beams are arranged at intervals of 1m-2m in the circumferential and axial directions, respectively. Under the premise of ensuring the stability of the support of the external curved panel, the strength of the existing internal curved panel is avoided from being affected.

[0015] Preferably, the arched crossbeam is divided into a plurality of arc-shaped crossbeams along the circumferential direction, a plurality of radial support beams are welded at intervals along the arc direction on the inner side of each arc-shaped crossbeam, and two adjacent arc-shaped crossbeams along the circumferential direction are detachably connected.

[0016] That is, a module is composed of an arc-shaped cross beam and a plurality of radial support beams, and a plurality of annular modules are detachably connected to form an external support structure, which is convenient for replacing modules to adapt to the support of external arc-shaped panels of different tunnel sections and can be used for constructing tunnel linings of gradual sections.

[0017] Preferably, the arc-shaped crossbeam includes a second I-beam component, the two flange plates of the second I-beam component are arranged opposite to each other along the radial direction of the arc-shaped crossbeam, a stiffening plate is connected between the two flange plates of the second I-beam component, and end plates are connected at both ends of the second I-beam component. The end plates are provided with end bolt holes, and two circumferentially adjacent arc-shaped crossbeams are connected by bolts.

[0018] Preferably, a reinforcing support is provided between the arch foot of the arched cross beam and the arch foot of the existing internal curved panel, and the reinforcing support is arranged horizontally.

[0019] The external curved panel is subjected to a larger lateral force at the arch foot. By providing a horizontal reinforcement support between the arch foot of the arched cross beam and the arch foot of the existing internal curved panel, the support stability at the arch foot can be ensured.

[0020] Preferably, the radial support beams arranged at intervals along the axial direction of the tunnel are connected through transverse connections, which can enhance the stability of the support for the external curved panel and improve the safety and quality of the lining casting of the tunnel widening section.

[0021] Preferably, a cross-connection hole is provided on the side of the radial support beam, and the cross-connection is connected to the radial support beam by bolts to facilitate disassembly and connection.

[0022] Preferably, the external curved panel is formed by splicing a plurality of curved splicing blocks, and some or all of the adjacent curved splicing blocks are connected by cotter pins, which is convenient for assembly and disassembly, and for removing the external curved panel splicing blocks at designated positions as concrete discharge ports and vibration ports.

[0023] Compared with the prior art, the utility model has the following beneficial effects:

[0024] The utility model discloses a trolley device for constructing a lining of a widened section of a tunnel, in which a radial support beam is arranged on the outer side of an existing internal curved panel of an existing cross-section trolley to support an arched cross beam, so that the arched cross beam can support the outer curved panel on the outer side, thereby ensuring that the outer curved panel always fits the arch of the lining of the widened section of the tunnel, so that the lining of the widened section of the tunnel can be poured and constructed, and the safety and quality of the arched construction of the lining of the widened section of the tunnel can be ensured, and the construction cost is lower than that of a special widened section lining trolley. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 This is a schematic diagram of the structure of the trolley device for lining construction of the tunnel widening section according to the utility model;

[0026] Figure 2-Figure 5 It is a schematic diagram of the segments of the outer support structure in the circumferential direction;

[0027] Figure 6 It is a schematic diagram of the connection between the arc beam and the radial support beam;

[0028] Figure 7 is a schematic diagram of an end plate at an arc-shaped end of an arc-shaped beam;

[0029] Figure 8 A schematic diagram of a plurality of arc-shaped splicing blocks connected by split pins to form an external arc-shaped panel (all split pins are not shown);

[0030] Markings in the figure: 1. Existing cross-section trolley; 11. Internal support of the trolley; 12. Moving device; 13. Hydraulic telescopic rod; 14. Existing internal curved panel; 15. First inverted arch; 21. External curved panel; 211. Curved splicing block; 212. Split pin; 213. Concrete discharge port and vibration port; 22. Curved crossbeam; 221. Stiffening plate; 222. End plate; 223. End bolt hole; 23. Radial support beam; 231. Strengthening support; 24. L-shaped fixed angle steel; 241. First bolt hole; 25. Second inverted arch; 26. Cross-connection; 261. Cross-connection connecting hole. DETAILED DESCRIPTION

[0031] The present invention is further described in detail below in conjunction with specific embodiments. However, this should not be understood as the scope of the above subject matter of the present invention being limited to the following embodiments, and all technologies realized based on the content of the present invention belong to the scope of the present invention.

[0032] Unless otherwise specified, in the description of the specific embodiments of the present utility model, the expression terms indicating the orientation or position relationship such as "upper", "lower", "left", "right", "center", "inside", "outside", etc. are all based on the expression of the orientation or position relationship shown in the drawings, or the orientation or position relationship when the product / equipment / device of the utility model is usually used. These terms of orientation or position relationship are only for the convenience of describing the scheme of the utility model or simplifying the description in the specific embodiments, so that technicians can quickly understand the scheme, rather than indicating or implying that a specific device / component / element must have a specific orientation, or be constructed and operated in a specific position relationship, and therefore cannot be understood as a limitation on the present utility model.

[0033] In addition, if the terms "horizontal", "vertical", "overhanging", "parallel" and the like appear, it does not mean that the corresponding devices / components / elements are required to be absolutely horizontal or vertical or overhanging or parallel, but may be slightly tilted or have deviations. For example, "horizontal" only means that its direction is more horizontal than "vertical", and does not mean that the structure must be completely horizontal, but may be slightly tilted. Alternatively, it can be simplified to mean that the corresponding devices / components / elements are set in directions such as "horizontal", "vertical", "overhanging", "parallel", etc., and can have an error / deviation of ±10% relative to the corresponding direction setting, more preferably an error / deviation within ±8%, more preferably an error / deviation within ±6%, more preferably an error / deviation within ±5%, and more preferably an error / deviation within ±4%. As long as the corresponding device / component / element is within the error / deviation range, it can still achieve its role in the solution of the utility model.

[0034] In addition, the expressions “first”, “second”, “third”, etc., which appear in the terms, are merely used to distinguish the description of the same or similar components and should not be understood as emphasizing or implying the relative importance of specific components.

[0035] In addition, in the description of the embodiments of the present invention, "several", "multiple" and "a number" represent at least 2. It can be any number such as 2, 3, 4, 5, 6, 7, 8, 9, and even more than 9.

[0036] In addition, in the description of the technical solution of the utility model, unless otherwise clearly specified / defined / restricted, the terms "set", "install", "connect", "connected", "provided with", "laid", and "arranged" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection, and can be welding, riveting, bolting, threading, and other commonly used connection means in the field. This connection can be a mechanical connection, an electrical connection, or a communication connection; it can be a direct connection, or an indirect connection through an intermediate medium, and it can be the internal communication of two components.

[0037] Example 1

[0038] like Figure 1 As shown, a trolley device for tunnel widening section lining construction includes an existing section trolley 1, an external curved panel 21 and an external support structure. The external curved panel 21 is supported on the outside of the existing section trolley 1 by the external support structure, and the widened tunnel lining section can be constructed on the basis of the existing section trolley 1.

[0039] In this solution, the existing cross-section trolley is an existing technology trolley that can be used in the tunnel. It can be used for tunnel lining construction of a part of the cross section. However, when constructing the tunnel widening section lining, the cross section of the tunnel widening section is larger than the cross section that the existing internal curved panel 14 can support, so the existing cross-section trolley cannot support the construction of the tunnel widening section lining. Figure 1 As shown, the existing cross-section trolley 1 comprises a trolley inner support 11, a moving device 12, a hydraulic telescopic rod 13 and an existing internal curved panel 14, wherein the moving device 12 is arranged at the bottom of the trolley inner support 11, and the hydraulic telescopic rod 13 is connected between the trolley inner support 11 and the existing internal curved panel 14. Figure 1 As shown, the arch feet on both sides of the existing internal curved panel 14 are adapted to the inner side surface of the first inverted arch 15 with a smaller cross-section.

[0040] In this embodiment, the outer curved panel 21 is arranged outside the existing inner curved panel 14, and the outer curved panel 21 is an arched shape adapted to the lining of the widened section of the tunnel, such as Figure 1 As shown, the arch feet on both sides of the outer curved panel 21 are adapted to the inner side surface of the second inverted arch 25 with a larger cross section;

[0041] The outer support structure includes an arched crossbeam and a radial support beam 23. The outer side of the arched crossbeam is adapted to support the inner side of the outer curved panel 21. The radial support beam 23 is connected between the arched crossbeam and the existing inner curved panel 14. On the basis of the existing section trolley, a radial support beam 23 is arranged on the outer side of the existing inner curved panel 14 of the existing section trolley to support the arched crossbeam, so that the arched crossbeam can support the outer outer curved panel 21, ensuring that the outer curved panel always adapts to the arch of the tunnel widening section lining, so that the tunnel widening section lining can be cast and constructed, which can ensure the safety and quality of the arched construction of the tunnel widening section lining, and compared with the special widening section lining trolley, its construction cost is lower.

[0042] In one or several embodiments, the radial support beam 23 may be in various structural forms, such as a box-shaped structure, an I-shaped structure, etc.

[0043] In one or more embodiments, one end of the radial support beam 23 is welded to the inner side of the arched cross beam, and the other end is detachably connected to the outer side of the existing internal curved panel 14. The radial support beam 23 is welded to the inner side of the arched cross beam to form a whole, which has better support capacity for the external curved panel; the radial support beam 23 is detachably connected to the outer side of the existing internal curved panel 14, which is convenient for installation and removal.

[0044] The radial support beam 23 can be detachably connected to the outer side of the existing internal curved panel 14 by a strong connection such as bolts. As a preferred embodiment, Figure 6 As shown, an L-shaped fixing angle steel 24 is provided at one end of the radial support beam 23 close to the existing internal curved panel 14, a first bolt hole 241 is provided on the L-shaped fixing angle steel 24, the existing internal curved panel 14 is provided with a second bolt hole corresponding to the first bolt hole 241, the second bolt hole of the first bolt hole 241 is arranged radially, and the L-shaped fixing angle steel 24 is bolted to the existing internal curved panel 14. The L-shaped fixing angle steel 24 is used as a connecting member to bolt the radial support beam 23 and the existing internal curved panel 14, which has a simple structure and is easy to install.

[0045] As a preferred implementation, Figure 6 As shown, the radial support beam 23 is a first I-beam member, and the two flange plates of the first I-beam member are arranged opposite to each other in the circumferential direction. The L-shaped fixed angle steel 24 is welded to the corner portion of the groove of the first I-beam member, so that the L-shaped fixed angle steel 24 is not only connected to the web of the first I-beam member, but also connected to the flange plate of the first I-beam member, which can provide a larger welding area and a more secure connection.

[0046] As a preferred embodiment, the second bolt holes are arranged at intervals of 1m-2m in the circumferential and axial directions along the existing internal curved panel 14, and the hole diameter of the second bolt holes is 16mm-22mm; that is, the first bolt holes 241 are arranged at intervals of 1m-2m in the circumferential and axial directions, and the radial support beams 23 are arranged at intervals of 1m-2m in the circumferential and axial directions, respectively. Under the premise of ensuring the stability of the support of the external curved panel, the strength of the existing internal curved panel 14 is avoided from being affected.

[0047] As a preferred implementation, Figure 2-Figure 5 As shown, the arched cross beam is divided into a plurality of arc-shaped cross beams 22 along the circumferential direction, and a plurality of radial support beams 23 are welded at intervals along the arc direction on the inner side of each arc-shaped cross beam 22, and two adjacent arc-shaped cross beams 22 along the circumferential direction are detachably connected. That is, the arc-shaped cross beam 22 and the plurality of radial support beams 23 form a module, and a plurality of circumferential modules are detachably connected to form an external support structure, which is convenient for replacing modules to adapt to the support of external arc-shaped panels of different tunnel sections, and can be used for constructing tunnel linings of gradual sections. Figure 2-Figure 5 As an illustration, from Figure 2-Figure 5 The modules are divided from the arch top to the arch foot in sequence, and the adjacent modules in the circumferential direction are detachably connected by arc-shaped cross beams 22 to form a whole, which is convenient for installation and disassembly.

[0048] like Figure 6 and Figure 7 As shown, the arc-shaped cross beam 22 includes a second I-beam member, and the two flange plates of the second I-beam member are arranged opposite to each other along the radial direction of the arc-shaped cross beam 22. A stiffening plate 221 is connected between the two flange plates of the second I-beam member. The number of stiffening plates 221 is selected according to actual conditions. Stiffening plates 221 are arranged near the two ends of the second I-beam member, and the two ends of the second I-beam member are connected with end plates 222, which can strengthen the ends of the second I-beam member. The end plate 222 is provided with an end bolt hole 223, and two adjacent arc-shaped cross beams 22 are connected by bolts in an annular direction. The arc-shaped cross beam 22 adopts the second I-beam member, which can not only meet the support strength, but also facilitate the connection of the end plate 222 bolts.

[0049] In one or more embodiments, Figure 1 and Figure 5 As shown, a reinforcing support 231 is provided between the arch foot of the arch beam and the arch foot of the existing internal curved panel 14, and the reinforcing support 231 is arranged horizontally. The external curved panel is subjected to a large lateral force at the arch foot, and by providing a horizontal reinforcing support 231 between the arch foot of the arch beam and the arch foot of the existing internal curved panel 14, the support stability at the arch foot can be ensured.

[0050] In one or more embodiments, Figure 2-Figure 5 As shown, the radial support beams 23 arranged at intervals along the axial direction of the tunnel are connected by cross-links 26, which can enhance the stability of the external curved panel support and improve the safety and quality of the lining pouring of the tunnel widening section. Furthermore, cross-link connection holes 261 are provided on the side of the radial support beams 23, and the cross-links 26 are connected to the radial support beams 23 by bolts, which is convenient for disassembly and connection.

[0051] In one or more embodiments, Figure 8 As shown, the outer arc panel 21 is formed by splicing a plurality of arc splicing blocks 211, and some or all of the adjacent arc splicing blocks 211 are connected by cotter pins 212, which is convenient for assembly and disassembly, and convenient for removing the splicing blocks of the outer arc panel 21 at the designated position as the concrete discharge port and the vibration port 213. The arc splicing blocks 211 are connected to the arc cross beam 22 by radial bolts or tied to the arc cross beam 22 by steel wires.

[0052] The improvement of the trolley device for the lining construction of the tunnel widening section mentioned in this embodiment is mainly composed of an arc-shaped cross beam 22, a radial support beam 23, an external arc-shaped panel 21, an L-shaped fixed angle steel 24, a cotter pin and bolts and nuts, etc. The main working process is: assembling the existing cross-section trolley, processing prefabricated accessories, drilling a second bolt hole on the existing internal arc-shaped panel 14, connecting the arc-shaped cross beam, the vertical support beam and the L-shaped fixed angle steel, using bolts and nuts to connect the arc-shaped cross beam and the vertical support beam and other accessories on the existing cross-section trolley, installing the external arc-shaped panel 21, positioning the trolley, and carrying out the widening lining construction of the large-section tunnel. The specific steps are as follows:

[0053] Step 1: Assemble the common existing section trolley and move the existing section trolley to the lining of the widened section of the large section tunnel.

[0054] Step 2: Assemble prefabricated assembly parts such as curved cross beams, vertical support beams, external curved panels, L-shaped fixed angle steels, cotter pins, bolts and nuts on the existing cross-section trolley.

[0055] Step 3: Measure and locate the construction position, lift the hydraulic cylinder, and fix the trolley construction position.

[0056] Step 4: Carry out lining construction of the widened section of the large-section tunnel.

[0057] Step 5: Remove the end template, release the pressure of the hydraulic cylinder, push it to the next construction location and repeat steps 2 to 4.

[0058] Step 6: After the lining construction of all large-section tunnel widening sections is completed, the trolley is removed.

[0059] This embodiment forms a large-section tunnel widening section lining trolley by adding an arc-shaped crossbeam, a radial support beam, and an external arc panel to the existing cross-section trolley, and connecting them into a whole through L-shaped fixed angle steel, cotter pins, bolts and nuts, etc., which improves the stability of the trolley, has high rigidity and is not easy to deform, and is stable and reliable as a whole. Concrete top punching and mold grouting construction can be carried out normally, ensuring the safety and quality of construction and reducing the length of concrete pouring. The external arc panel is smooth and reduces the misalignment of concrete. By adjusting the cotter pins connected to the external arc panel, the concrete discharge port and the vibration port 213 can be adjusted to ensure the quality of construction vibration, and the concrete can be fully vibrated. The top punching and mold grouting construction can be carried out normally, making the concrete dense and the appearance smooth and smooth. It solves the problem that the traditional construction scaffold cannot effectively carry out concrete construction vibration and mold grouting due to deformation, which easily causes the vault to be emptied and it is difficult to ensure safety and quality. The external support structure and the external arc panel 21 used are all prefabricated in the factory, with unified processing standards, convenient assembly, and reduced time. The assembly parts are bolted together and can be repeatedly disassembled and assembled to adapt to the construction of variable-section linings. They can be repeatedly disassembled and assembled for turnover use, which reduces construction investment and environmental pollution. It solves the problem that traditional construction trolleys are not suitable for variable-section lining concrete construction and rapid disassembly and assembly turnover. The utility model brings the following effects: 1. The trolley device for the lining construction of the widened section of the tunnel has an adjustable widened section outer arc lining template, which realizes the rapid construction of the variable-section lining and ensures the construction quality; 2. The widened existing section trolley is bolted to the existing section trolley through an arc-shaped crossbeam and a radial support beam, which realizes the rapid assembly of the second lining trolley of the widened section, improves construction efficiency, and reduces construction investment. It can ensure the normal construction vibration, top punching and grouting of concrete, and reduce construction investment and the risk of scaffold deformation, ensure the safety and quality of construction, speed up construction, and reduce environmental pollution.

[0060] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A trolley device for tunnel widening section lining construction, comprising an existing cross-section trolley (1), the existing cross-section trolley (1) having a trolley inner support (11), a moving device (12), a hydraulic telescopic rod (13) and an existing internal curved panel (14), the moving device (12) being arranged at the bottom of the trolley inner support (11), the hydraulic telescopic rod (13) being connected between the trolley inner support (11) and the existing internal curved panel (14); It is characterized in that include An external curved panel (21), the external curved panel (21) being arranged outside the existing internal curved panel (14), the external curved panel (21) being an arch shape adapted to the lining of the widening section of the tunnel; An external support structure, the external support structure comprises an arched cross beam and a radial support beam (23), the outer side of the arched cross beam is adapted to be supported on the inner side of the external curved panel (21), and the radial support beam (23) is connected between the arched cross beam and the existing internal curved panel (14).

2. A trolley device for tunnel widening section lining construction according to claim 1, characterized in that: One end of the radial support beam (23) is welded to the inner side of the arched cross beam, and the other end is detachably connected to the outer side of the existing internal curved panel (14).

3. A trolley device for tunnel widening section lining construction according to claim 2, characterized in that: An L-shaped fixing angle steel (24) is provided at one end of the radial support beam (23) close to the existing internal curved panel (14); a first bolt hole (241) is provided on the L-shaped fixing angle steel (24); the existing internal curved panel (14) is provided with a second bolt hole corresponding to the first bolt hole (241); the L-shaped fixing angle steel (24) and the existing internal curved panel (14) are bolted together.

4. A trolley device for tunnel widening section lining construction according to claim 3, characterized in that: The radial support beam (23) is a first I-beam component, two flange plates of the first I-beam component are arranged opposite to each other in the circumferential direction, and the L-shaped fixing angle steel (24) is welded to the corner portion in the groove of the first I-beam component.

5. A trolley device for tunnel widening section lining construction according to claim 3, characterized in that: The second bolt holes are arranged at intervals of 1m-2m in the circumferential direction and the axial direction along the existing internal curved panel (14), and the hole diameters of the second bolt holes are 16mm-22mm.

6. A trolley device for tunnel widening section lining construction according to claim 2, characterized in that: The arched cross beam is divided into a plurality of arc-shaped cross beams (22) along the circumferential direction, a plurality of radial support beams (23) are welded at intervals along the arc direction on the inner side of each arc-shaped cross beam (22), and two adjacent arc-shaped cross beams (22) along the circumferential direction are detachably connected.

7. A trolley device for tunnel widening section lining construction according to claim 6, characterized in that: The arc-shaped cross beam (22) comprises a second I-beam component, two flange plates of the second I-beam component are arranged opposite to each other along the radial direction of the arc-shaped cross beam (22), a stiffening plate (221) is connected between the two flange plates of the second I-beam component, end plates (222) are connected at both ends of the second I-beam component, the end plates (222) are provided with end bolt holes (223), and two circumferentially adjacent arc-shaped cross beams (22) are connected by bolts.

8. A trolley device for tunnel widening section lining construction according to any one of claims 1 to 7, characterized in that: A reinforcing support (231) is provided between the arch foot of the arched cross beam and the arch foot of the existing internal curved panel (14), and the reinforcing support (231) is arranged horizontally.

9. A trolley device for tunnel widening section lining construction according to any one of claims 1 to 7, characterized in that: The radial support beams (23) arranged at intervals along the axial direction of the tunnel are connected by a cross-link (26).

10. A trolley device for tunnel widening section lining construction according to any one of claims 1 to 7, characterized in that: The external arc-shaped panel (21) is formed by splicing a plurality of arc-shaped splicing blocks (211), and some or all of the adjacent arc-shaped splicing blocks (211) are connected via split pins (212).

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