A tunnel steel pipe rounding machine and construction method

Abstract

This invention relates to the field of tunnel steel pipe circular support construction technology, and discloses a tunnel steel pipe circular support machine and construction method. The circular support machine has a ring frame structure, with symmetrical upper and lower walking mechanisms at both ends of the ring frame structure for self-movement and positioning within the tunnel steel pipe. Four sets of synchronously telescopic arc-shaped support frames are symmetrically arranged on the outer side of the circular main frame at both ends of the ring frame structure. Each set of arc-shaped support frames is connected to the main frame through a pair of support cylinders and a jack, and is uniformly driven by a hydraulic pump station, thereby forming a precise and stable circular support for the inner wall of the pipe. During construction, by controlling the synchronous extension and retraction of the arc-shaped support frames, the middle part of the pipe section is supported in sequence to assist the pouring of the outer concrete, and the butt weld of adjacent pipe sections is supported to assist the welding operation. This invention has a high degree of integration and is easy to operate, solving the problems of low efficiency and poor accuracy of manual support and correction, and effectively ensuring the construction quality and efficiency of pressure steel pipes in tunnels.

Description

Technical Field

[0001] This invention relates to the construction of steel pipe sizing in tunnels, and more particularly to a tunnel steel pipe sizing machine and construction method. Background Technology

[0002] Currently, steel pipe construction in tunnels is used for pressure steel pipes in tunnel energy storage. These steel pipes are large pipes assembled from welded segments. During construction, due to the large radius and weight of the pipe segments, the downward force of gravity on the upper part of the pipe segment easily causes it to deform into an elliptical shape. Existing tunnel steel pipe construction requires manual support and correction of the pipe segments to a circular shape using supports before installation. This involves pouring concrete between the outer side of the pipe and the tunnel for reinforcement and support, followed by welding the pipe segments together. Because there is no dedicated steel pipe support equipment, manually supporting the pipe segments using supports is difficult, the components are complex, and disassembly is challenging. The circular correction of the pipe segments is prone to errors and time-consuming, affecting the construction progress and increasing the difficulty of constructing steel pipe segments for tunnel energy storage, making it difficult to guarantee the quality of construction. In view of the above reasons, a tunnel steel pipe circularization machine and construction method are proposed. Summary of the Invention

[0003] The purpose of this invention is to overcome the problems of existing tunnel pressure steel pipeline construction, where concrete pouring and pipe section welding are difficult due to the lack of dedicated steel pipeline support equipment. Manually supporting and correcting the circular shape of the steel pipe sections using supports is challenging, affecting construction progress and compromising safety. This invention provides a tunnel steel pipeline circularization machine and construction method through a rational design. The machine uses a circular main frame with symmetrical arc-shaped support frames on the outer side for synchronous support, eliminating the need for component disassembly and easily correcting large tunnel steel pipelines to a circular shape. The arc-shaped support frames are controlled by hydraulic cylinders and jacks for expansion and contraction, ensuring stable and accurate support. An active walking mechanism controls the circularization machine's movement within the tunnel steel pipeline, providing circular support to the middle section and joints of the pipe sections. The machine operates flexibly within the tunnel steel pipeline, ensuring the circular shape of the pipeline, accelerating construction progress, and ensuring the construction quality of the tunnel energy storage pressure steel pipeline.

[0004] To achieve the above objectives, the present invention adopts the following technical solution: On one hand, it provides a tunnel steel pipe stretching machine, comprising: a steel pipe stretching machine, a circular main frame, frame columns, frame beams, a working platform, frame longitudinal beams, side arc-shaped support frames, top arc-shaped support frames, bottom arc-shaped support frames, support cylinders, jacks, an active walking mechanism, a steering mechanism, a telescopic wheel frame mechanism, wheel frame longitudinal beams, auxiliary walking wheels, a control cabinet, a hydraulic pump station, a tunnel steel pipe, a connecting steel pipe section, and a pouring section steel pipe; the steel pipe stretching machine is installed within the tunnel steel pipe, with a pair of circular main frames at both ends of the machine, and frame longitudinal beams evenly distributed longitudinally around the pair of circular main frames. The pair of circular main frames and the frame longitudinal beams form a ring-shaped frame, with two pairs of auxiliary walking wheels and two pairs of active walking mechanisms respectively configured at the upper and lower parts of both ends of the ring-shaped frame; a pair of circular main frames... Two sets of arc-shaped support frames are symmetrically arranged at both ends of the main frame. Each set of arc-shaped support frames consists of four support frames on the upper, lower, and two sides. The four support frames are respectively configured as a pair of side arc-shaped support frames, a top arc-shaped support frame, and a bottom arc-shaped support frame. A pair of circular main frames are made of circular square steel pipes. The inner ring wall of the circular square steel pipes is configured as support rings. A pair of support cylinders are installed between the support rings and the two ends of the support frames. Jacks are installed between the pair of support cylinders. A support frame mechanism is set up between each support frame and the pair of support cylinder jacks. The four support frame mechanisms are used for the synchronous extension and support of the four support frames. Hydraulic pipelines are installed between the support cylinders and the hydraulic pump station. The upper, middle, and lower parts of the steel pipe rounding machine are respectively equipped with working platforms. The middle working platform is equipped with a control cabinet and a hydraulic pump station at both ends. A control line is installed between the control cabinet and the hydraulic pump station.

[0005] A pair of frame columns are respectively installed between the upper and lower parts of the middle of the pair of annular main frames. A pair of frame beams are respectively installed between the two sides of the middle of the pair of annular main frames. The intersection of the pair of frame columns and the pair of frame beams forms the surface support frame of the annular main frames. Two pairs of wheel frame longitudinal beams are installed between the pair of annular main frames, and the two pairs of wheel frame longitudinal beams are symmetrically arranged on both sides above and below the pair of annular main frames. Active walking mechanisms are respectively installed at both ends of the lower pair of wheel frame longitudinal beams. Insertion sleeves are set between the two ends of the pair of wheel frame longitudinal beams and the active walking mechanisms. Telescopic wheel frame mechanisms are installed in the insertion sleeves. The lower end of the telescopic wheel frame mechanism is connected to the active walking mechanism. A steering mechanism is installed between the active walking mechanism and a telescopic wheel frame mechanism for extending, retracting, and raising / lowering the active walking mechanism. Hydraulic motors are installed on one side of each walking wheel of the active walking mechanism, with hydraulic pipelines connecting each motor to a hydraulic pump station. These motors drive the active walking mechanism. Auxiliary walking wheels are installed at both ends of a pair of upper wheel frame longitudinal beams, with insertion sleeves connecting each end of the longitudinal beams to the auxiliary walking wheels. Telescopic wheel frame mechanisms are installed within these sleeves for extending, retracting, and raising / lowering the auxiliary walking wheels. The active walking mechanism and auxiliary walking wheels are used for the movement of the steel pipe rounding machine.

[0006] The tunnel is equipped with steel pipes, and a pipe rounding machine is installed within these pipes. The tunnel steel pipes are divided into butt-joint sections and cast-in-place sections. The pipe rounding machine is installed within the cast-in-place section to round the outside of the pipes during concrete pouring. A pipe rounding machine is also installed between the butt-joint and cast-in-place sections to round the welded joint between them.

[0007] On the other hand, a tunnel steel pipe sizing machine and construction method are provided. After the steel pipe sections for connection and casting are transported into the tunnel, they are elliptical pipe sections with a vertical diameter smaller than their horizontal diameter. The steel pipe sizing machine operates within the connection and casting sections to provide circular support. Once the steel pipe in the casting section is positioned within the tunnel concrete casting section, the manual control cabinet controls the two sets of arc-shaped support frames at both ends of the steel pipe sizing machine to retract synchronously via a hydraulic pump station until the radius of the steel pipe sizing machine is at its minimum. The manual control cabinet then uses hydraulic... The pump station controls the active walking mechanism to drive the steel pipe rounding machine to move and run. After the steel pipe rounding machine moves into the support position in the middle of the steel pipe of the pouring section, it stops. The manual operation control cabinet controls the two sets of arc support frames to extend outward synchronously through the hydraulic pump station. The two sets of arc support frames provide synchronous support for the middle of the steel pipe of the pouring section. During synchronous support, the jacks are manually controlled to reinforce the middle of the arc support frames. When the steel pipe of the pouring section is detected to be circular by manual inspection, it stops and locks. After the steel pipe rounding machine completes the circular support of the steel pipe of the pouring section, it waits for the concrete pouring construction.

[0008] After the concrete pouring on the outside of the steel pipe section is completed and solidified, the steel pipe section and the outer concrete form a composite, strengthening the pipe support. At the same time, the steel pipe section is transported to the steel pipe section and then connected at the mouth. The joint at the mouth is then left to be rounded and sealed by welding.

[0009] After the steel pipe section is cast and the outer concrete is combined and shaped, the manual operation control cabinet controls the two sets of arc-shaped support frames of the steel pipe stretching machine via the hydraulic pump station to synchronously retract and disengage from the support of the cast steel pipe section. The manual operation control cabinet then controls the active walking mechanism via the hydraulic pump station to move towards the opening. The active walking mechanism drives the steel pipe stretching machine to the opening between the cast steel pipe section and the connecting steel pipe section. After the center of the steel pipe stretching machine is positioned corresponding to the joint at the opening, it stops. The manual operation control cabinet then controls the two sets of arc-shaped support frames at both ends of the steel pipe stretching machine via the hydraulic pump station to... Simultaneously extending, a set of arc-shaped support frames at one end of the steel pipe stretching machine provides circular support to the opening of the cast section of steel pipe until the vertical and horizontal diameters of the cast section of steel pipe are the same, forming a circle. At the other end of the steel pipe stretching machine, a set of arc-shaped support frames provides circular support to the opening of the connecting steel pipe section until the vertical and horizontal diameters of the connecting steel pipe section are the same, forming a circle. After the casting section of steel pipe and the connecting steel pipe section are circularly supported by the steel pipe stretching machine and their openings are aligned, the machine stops. The sealing welding construction is then carried out on the joint between the openings of the casting section of steel pipe and the connecting steel pipe section by manual control of the welding machine.

[0010] After the complete sealing welding of the joint around the opening is completed, the sealing welding construction of the joint between the cast-in-place steel pipe section and the connecting steel pipe section is completed. After the sealing welding construction of the joint is completed, the manual operation control cabinet controls the two sets of arc-shaped support frames at both ends of the steel pipe rounding machine to retract synchronously through the hydraulic pump station. After the steel pipe rounding machine is disengaged from the sealed welded joint, the manual operation control cabinet controls the active walking mechanism to move towards the opening through the hydraulic pump station. The active walking mechanism drives the steel pipe rounding machine to the support position in the middle of the connecting steel pipe section and then stops. The manual operation control cabinet controls the two sets of arc-shaped support frames to extend outward synchronously through the hydraulic pump station. The two sets of arc-shaped support frames provide synchronous circular support in the middle of the connecting steel pipe section. After the circular support of the connecting steel pipe section is completed, the above operation process is repeated for continuous construction.

[0011] Beneficial effects: This invention employs a tunnel steel pipe rounding machine. The outer side of the machine is a circular main frame, which is synchronously supported by symmetrical arc-shaped support frames on the outer side of the circular main frame, both vertically and horizontally. This integrated mechanism avoids the need for disassembly and assembly of components, and can easily correct large tunnel steel pipes to a circular shape. The arc-shaped support frames are controlled to extend and retract via support cylinders and jacks, ensuring stable and accurate support. The active walking mechanism controls the steel pipe rounding machine to move within the tunnel steel pipe, providing circular support for the middle section and joints of the pipe segments. The machine operates flexibly within the tunnel steel pipe, supporting the pipe to a circular standard, which can accelerate the construction progress of the tunnel steel pipe and ensure the construction quality of the tunnel energy storage pressure steel pipe. Attached Figure Description

[0012] The present invention will be further described below with reference to the accompanying drawings:

[0013] Figure 1 This is a schematic diagram of the overall assembly structure;

[0014] Figure 2 yes Figure 1 A partial structural diagram of the arc-shaped support frame in its telescopic state;

[0015] Figure 3 yes Figure 1 A partial structural diagram of the control circuit for the support cylinder;

[0016] Figure 4 yes Figure 2 A partial structural diagram of the control circuit for the telescopic wheel frame mechanism;

[0017] Figure 5 yes Figure 1 A partial structural diagram of the control circuit of the active walking mechanism;

[0018] Figure 6 yes Figure 1 A schematic diagram of the three-dimensional structure;

[0019] Figure 7 yes Figure 1 A schematic diagram of the circular structure in the pouring state of the pipeline section;

[0020] Figure 8 yes Figure 1 A schematic diagram of the circular structure of a pipe section in the butt-welded state;

[0021] Figure 9 yes Figure 8 A schematic diagram of the three-dimensional structure;

[0022] Figure 1 , 21. Steel pipe forming machine; 2. Circular main frame; 3. Frame column; 4. Frame beam; 5. Working platform; 6. Frame longitudinal beam; 7. Side arc support frame; 8. Top arc support frame; 9. Bottom arc support frame; 10. Support cylinder; 11. Jack; 12. Active walking mechanism; 13. Steering mechanism; 14. Telescopic wheel frame mechanism; 15. Wheel frame longitudinal beam; 16. Auxiliary walking wheel; 17. Control cabinet; 18. Hydraulic pump station; 19. Tunnel steel pipe; 10. Connecting steel pipe section; 11. Casting section steel pipe; 11. Detailed Implementation

[0023] The present invention will be further described in detail below with reference to embodiments and specific implementation methods:

[0024] Example 1

[0025] This embodiment provides a tunnel steel pipe stretching machine; a steel pipe stretching machine 1 is installed in the tunnel steel pipe 11, and a pair of annular main frames 2 are set at both ends of the steel pipe stretching machine 1. Longitudinal beams 2-4 are evenly distributed around the pair of annular main frames 2. The pair of annular main frames 2 and the longitudinal beams 2-4 are set as a ring frame. The upper and lower parts of both ends of the ring frame are respectively set as two pairs of auxiliary traveling wheels 8 and two pairs of active traveling mechanisms 7. Two sets of arc-shaped support frames are symmetrically set at both ends of the pair of annular main frames 2. Each set of arc-shaped support frames is set as four support frames on the upper, lower, and sides. The four support frames are respectively set as a pair of side arc-shaped support frames 3, a top arc-shaped support frame 4, and a bottom arc-shaped support frame 4. -1; A pair of circular main frames 2 are set as circular square steel pipes, and the inner ring wall of the circular square steel pipes is set as a support ring. A pair of support cylinders 5 are set between the support rings and the two ends of the support frame; a jack 6 is set between the pair of support cylinders 5. A support frame mechanism is set between a support frame and a pair of support cylinders 5 and jacks 6. The four support frame mechanisms are used for the synchronous extension and support of the four support frames; hydraulic pipelines are set between the support cylinders 5 and the hydraulic pump station 10; the upper, middle and lower parts of the steel pipe rounding machine 1 are respectively set with working platforms 2-3. The two ends of the middle working platform 2-3 are respectively set with control cabinet 9 and hydraulic pump station 10. Control lines are set between control cabinet 9 and hydraulic pump station 10.

[0026] Example 2

[0027] A pair of frame columns 2-1 are respectively installed between the upper and lower parts of the middle of the pair of annular main frames 2. A pair of frame beams 2-2 are respectively installed between the two sides of the middle of the pair of annular main frames 2. The pair of frame columns 2-1 and the pair of frame beams 2-2 intersect to form the surface support frame of the annular main frame 2. Two pairs of wheel frame longitudinal beams 7-3 are installed between the pair of annular main frames 2. The two pairs of wheel frame longitudinal beams 7-3 are symmetrically arranged on both sides above and below the pair of annular main frames 2. Active walking mechanisms 7 are respectively installed at both ends of the lower pair of wheel frame longitudinal beams 7-3. Insertion sleeves are set between the two ends of the pair of wheel frame longitudinal beams 7-3 and the active walking mechanism 7. Telescopic wheel frame mechanisms 7-2 are installed in the insertion sleeves. The lower end of the telescopic wheel frame mechanism 7-2 is connected to the active walking mechanism 7. A steering mechanism is installed between the walking mechanisms 7, which is used for steering the active walking mechanism 7; a telescopic wheel frame mechanism 7-2 is used for the telescopic and lifting of the active walking mechanism 7; a hydraulic motor is installed on one side of the walking wheel of the active walking mechanism 7, and a hydraulic pipeline is installed between the hydraulic motor and the hydraulic pump station 10, and the hydraulic motor is used to drive the walking of the active walking mechanism 7; an auxiliary walking wheel 8 is installed at both ends of the pair of wheel frame longitudinal beams 7-3 above, and a plug-in sleeve is installed between the two ends of the pair of wheel frame longitudinal beams 7-3 and the auxiliary walking wheel 8, and a telescopic wheel frame mechanism 7-2 is installed in the plug-in sleeve, which is used for the telescopic and lifting of the auxiliary walking wheel 8; the active walking mechanism 7 and the auxiliary walking wheel 8 are used for the walking of the steel pipe rounding machine 1.

[0028] Example 3

[0029] A tunnel steel pipe 11 is installed in the tunnel. A steel pipe rounding machine 1 is installed in the tunnel steel pipe 11. The tunnel steel pipe 11 is divided into a butt joint steel pipe section 11-1 and a pouring section steel pipe 11-2. The steel pipe rounding machine 1 is installed in the pouring section steel pipe 11-2. The steel pipe rounding machine 1 is used to round the outside of the pouring section steel pipe 11-2 during the concrete pouring construction process. The steel pipe rounding machine 1 is also installed between the joint of the butt joint steel pipe section 11-1 and the pouring section steel pipe 11-2. The steel pipe rounding machine 1 is used to round the joint of the butt joint steel pipe section 11-1 and the pouring section steel pipe 11-2 during the welding construction process.

[0030] Example 4

[0031] This embodiment provides a tunnel steel pipe sizing machine and construction method as described above. After the steel pipe sections 11-1 (for connecting and pouring) and 11-2 (for pouring) enter the tunnel, they are elliptical pipe sections with a vertical diameter smaller than their horizontal diameter. The steel pipe sizing machine 1 operates within the sections 11-1 and 11-2 to provide circular support. Once the steel pipe 11-2 is positioned within the concrete pouring section of the tunnel, the manual operation control cabinet 9 controls the two sets of arc-shaped support frames at both ends of the steel pipe sizing machine 1 to synchronously retract via the hydraulic pump station 10. This synchronous retraction continues until the radius of the steel pipe sizing machine 1 is at its minimum. The manual operation control cabinet 9 then controls the hydraulic pump station 10 to... The hydraulic pump station 10 controls the active walking mechanism 7 to drive the steel pipe rounding machine 1 to move. After the steel pipe rounding machine 1 moves into the support position in the middle of the steel pipe 11-2 in the pouring section, it stops. The manual operation control cabinet 9 controls the two sets of arc-shaped support frames to extend outward synchronously through the hydraulic pump station 10. The two sets of arc-shaped support frames provide synchronous support for the middle of the steel pipe 11-2 in the pouring section. During synchronous support, the manual control jack 6 reinforces the middle of the arc-shaped support frame. When the steel pipe 11-2 in the pouring section is detected to be circular by manual inspection, it stops and locks. After the steel pipe rounding machine 1 completes the circular support of the steel pipe 11-2 in the pouring section, it waits for the concrete pouring construction.

[0032] Example 5

[0033] After the concrete pouring and solidification of the outer side of the steel pipe 11-2 in the pouring section is completed, the steel pipe 11-2 in the pouring section and the outer concrete form a composite, which strengthens the pipe support. At the same time, the steel pipe section 11-1 is transported to the mouth of the steel pipe 11-2 in the pouring section and then the pouring is stopped. The joint at the mouth of the joint awaits the rounding and sealing welding construction.

[0034] After the steel pipe 11-2 in the pouring section is combined and shaped with the outer concrete, the manual operation control cabinet 9 controls the two sets of arc-shaped support frames of the steel pipe stretching machine 1 to synchronously retract and disengage from the support of the steel pipe 11-2 in the pouring section via the hydraulic pump station 10. The manual operation control cabinet 9 then controls the active walking mechanism 7 to move towards the opening. The active walking mechanism 7 drives the steel pipe stretching machine 1 to the opening between the steel pipe 11-2 in the pouring section and the connecting steel pipe section 11-1. After the center of the steel pipe stretching machine 1 is positioned corresponding to the joint at the opening, it stops. The manual operation control cabinet 9 then controls the two sets of arc-shaped support frames supporting the two ends of the steel pipe stretching machine 1 to synchronously retract and disengage from the support of the steel pipe 11-2 in the pouring section via the hydraulic pump station 10. The steel pipe stretching machine 1 extends, and a set of arc-shaped support frames at one end provides circular support to the opening of the cast steel pipe 11-2 until the vertical and horizontal diameters of the cast steel pipe 11-2 are the same, forming a circle. The other set of arc-shaped support frames at the other end of the steel pipe stretching machine 1 provides circular support to the opening of the connected steel pipe section 11-1 until the vertical and horizontal diameters of the connected steel pipe section 11-1 are the same, forming a circle. After the cast steel pipe 11-2 and the connected steel pipe section 11-1 are circularly supported by the steel pipe stretching machine 1 and their openings are aligned, the machine stops. The welding machine is then manually controlled to perform sealing welding on the joint between the openings of the cast steel pipe 11-2 and the connected steel pipe section 11-1.

[0035] Example 6

[0036] After the complete sealing welding of the joint around the opening is completed, the sealing welding construction of the joint between the cast steel pipe 11-2 and the connecting steel pipe section 11-1 is completed. After the sealing welding construction of the joint is completed, the manual operation control cabinet 9 controls the two sets of arc-shaped support frames at both ends of the steel pipe rounding machine 1 to retract synchronously through the hydraulic pump station 10, and the steel pipe rounding machine 1 disengages from the sealed welded joint. The manual operation control cabinet 9 controls the active walking mechanism 7 to move towards the opening through the hydraulic pump station 10. The active walking mechanism 7 drives the steel pipe rounding machine 1 to the support position in the middle of the connecting steel pipe section 11-1 and then stops. The manual operation control cabinet 9 controls the two sets of arc-shaped support frames to extend outward synchronously through the hydraulic pump station 10. The two sets of arc-shaped support frames provide synchronous circular support in the middle of the connecting steel pipe section 11-1. After the circular support of the connecting steel pipe section 11-1 is completed, the above operation process is repeated for continuous construction.

Claims

1. A tunnel steel pipe rounding machine, comprising: a steel pipe rounding machine (1), a circular main frame (2), frame columns (2-1), frame crossbeams (2-2), a working platform (2-3), frame longitudinal beams (2-4), a side arc-shaped support frame (3), a top arc-shaped support frame (4), a bottom arc-shaped support frame (4-1), a support cylinder (5), a jack (6), an active walking mechanism (7), a steering mechanism (7-1), a telescopic wheel frame mechanism (7-2), wheel frame longitudinal beams (7-3), auxiliary walking wheels (8), a control cabinet (9), a hydraulic pump station (10), a tunnel steel pipe (11), a connecting steel pipe section (11-1), and a casting section steel pipe (11-2); characterized in that: A steel pipe rounding machine (1) is installed in the tunnel steel pipe (11). A pair of circular main frames (2) are set at both ends of the steel pipe rounding machine (1). The frame longitudinal beams (2-4) are evenly distributed around the pair of circular main frames (2). The pair of circular main frames (2) and the frame longitudinal beams (2-4) are set as a ring frame. The upper and lower parts of the two ends of the ring frame are respectively set as two pairs of auxiliary walking wheels (8) and two pairs of active walking mechanisms (7). Two sets of arc support frames are symmetrically set at both ends of the pair of circular main frames (2). Each set of arc support frames is set as four support frames on the upper, lower and sides. The four support frames are respectively set as a pair of side arc support frames (3), a top arc support frame (4) and a bottom arc support frame (4-1). The pair of circular main frames (2) are set as annular square steel pipes. The inner ring wall of the annular square steel pipe is set as a support ring. A pair of support cylinders (5) are set between the support ring and the two ends of the support frame. A jack (6) is set between a pair of support cylinders (5), and a support frame is set with a pair of support cylinders (5) and jacks (6). The four sets of support frame mechanisms are used for the synchronous extension and support of the four support frames. Hydraulic pipelines are set between the support cylinders (5) and the hydraulic pump station (10). A pair of frame columns (2-1) are set between the upper and lower parts of the middle of a pair of circular main frames (2). A pair of frame beams (2-2) are set between the two sides of the middle of a pair of circular main frames (2). A pair of frame columns (2-1) and a pair of frame beams (2-2) are set to form the surface support frame of the circular main frame (2). The upper, middle and lower parts of the steel pipe stretching machine (1) are set with working platforms (2-3). The two ends of the middle working platform (2-3) are set with control cabinets (9) and hydraulic pump stations (10). Control lines are set between control cabinets (9) and hydraulic pump stations (10). A tunnel steel pipe (11) is installed in the tunnel. A steel pipe rounding machine (1) is installed in the tunnel steel pipe (11). The tunnel steel pipe (11) is respectively set with a butt steel pipe section (11-1) and a pouring section steel pipe (11-2). A steel pipe rounding machine (1) is installed in the pouring section steel pipe (11-2). The steel pipe rounding machine (1) is used to round the outside of the pouring section steel pipe (11-2) during the concrete pouring process. A steel pipe rounding machine (1) is installed between the joint of the butt steel pipe section (11-1) and the pouring section steel pipe (11-2). The steel pipe rounding machine (1) is used to round the joint of the butt steel pipe section (11-1) and the pouring section steel pipe (11-2) during the welding process.

2. A tunnel steel pipe rounding machine according to claim 1; characterized in that: Two pairs of wheel frame longitudinal beams (7-3) are arranged between the pair of annular main frames (2). The two pairs of wheel frame longitudinal beams (7-3) are symmetrically arranged on both sides above and below the pair of annular main frames (2). Active walking mechanisms (7) are respectively arranged at both ends of the lower pair of wheel frame longitudinal beams (7-3). Insertion sleeves are set between the two ends of the pair of wheel frame longitudinal beams (7-3) and the active walking mechanism (7). Telescopic wheel frame mechanisms (7-2) are set in the insertion sleeves. A steering mechanism (7-1) is set between the lower end of the telescopic wheel frame mechanism (7-2) and the active walking mechanism (7). The steering mechanism (7-1) is used for steering the active walking mechanism (7). The telescopic wheel frame mechanism (7-2) is used for active walking mechanism (7-3). The walking mechanism (7) is telescopic and lifting; hydraulic motors are respectively installed on one side of the walking wheel of the active walking mechanism (7), and hydraulic pipelines are respectively installed between the hydraulic motors and the hydraulic pump station (10). The hydraulic motors are used to drive the walking mechanism (7) to walk; auxiliary walking wheels (8) are respectively installed at both ends of the pair of wheel frame longitudinal beams (7-3) above, and plug-in sleeves are respectively installed between the pair of wheel frame longitudinal beams (7-3) and the auxiliary walking wheels (8). Telescopic wheel frame mechanism (7-2) is installed in the plug-in sleeve. Telescopic wheel frame mechanism (7-2) is used for the telescopic and lifting of the auxiliary walking wheels (8); the active walking mechanism (7) and the auxiliary walking wheels (8) are used for the walking of the steel pipe rounding machine (1).

3. A construction method for a tunnel steel pipe sizing machine, as described in any one of claims 1-2, characterized in that: After the steel pipe sections (11-1) and (11-2) are transported and connected, and enter the tunnel, they are elliptical pipe sections with a vertical diameter smaller than their horizontal diameter. The steel pipe sizing machine (1) operates between the steel pipe sections (11-1) and (11-2) to provide circular support. When the steel pipe section (11-2) is positioned in the tunnel concrete pouring section, the manual operation control cabinet (9) controls the two sets of arc-shaped support frames at both ends of the steel pipe sizing machine (1) to retract synchronously through the hydraulic pump station (10). After the synchronous retraction is until the radius of the steel pipe sizing machine (1) is at its minimum, the manual operation control cabinet (9) controls the active walking through the hydraulic pump station (10). The mechanism (7) drives the steel pipe rounding machine (1) to walk and run. After the steel pipe rounding machine (1) walks into the support position in the middle of the steel pipe (11-2) of the pouring section, it stops. The manual operation control cabinet (9) controls the two sets of arc support frames to extend outward synchronously through the hydraulic pump station (10). The two sets of arc support frames provide synchronous support for the middle of the steel pipe (11-2) of the pouring section. During synchronous support, the manual control jack (6) reinforces the middle of the arc support frame. When the steel pipe (11-2) of the pouring section is detected to be circular by manual inspection, it stops and locks. After the steel pipe rounding machine (1) provides circular support for the steel pipe (11-2) of the pouring section, it waits for the concrete pouring construction.

4. The construction method of a tunnel steel pipe sizing machine according to claim 3; characterized in that: After the concrete pouring and solidification of the outer side of the steel pipe section (11-2) is completed, the steel pipe section (11-2) and the outer concrete form a composite, strengthening the pipe support; at the same time, the connecting steel pipe section (11-1) is transported to the mouth of the steel pipe section (11-2) and then stops, and the joint at the mouth is waiting for rounding and sealing welding construction; after the steel pipe section (11-2) and the outer concrete are composite and shaped, the manual operation control cabinet (9) controls the two sets of arc support frames of the steel pipe rounding machine (1) through the hydraulic pump station (10) to synchronously shrink and disengage from the support of the steel pipe section (11-2), and through the manual operation control cabinet (9) through the hydraulic pump station (10) to control the active walking mechanism (7) to move towards the mouth, and the active walking mechanism (7) drives the steel pipe rounding machine (1) to move to the mouth of the steel pipe section (11-2) and the connecting steel pipe section (11-1), and the steel pipe rounding machine (1) in After the position of the joint at the mouth is located, stop; the manual operation control cabinet (9) controls the two sets of arc support frames at both ends of the steel pipe rounding machine (1) to extend synchronously through the hydraulic pump station (10). One set of arc support frames at one end of the steel pipe rounding machine (1) provides circular support to the mouth of the steel pipe (11-2) in the casting section until the vertical and horizontal diameters of the steel pipe (11-2) in the casting section are the same and circular. The other set of arc support frames at the other end of the steel pipe rounding machine (1) provides circular support to the mouth of the steel pipe section (11-1) in the docking section until the vertical and horizontal diameters of the mouth of the docking steel pipe section (11-1) are the same and circular. After the steel pipe (11-2) in the casting section and the docking steel pipe section (11-1) are circularly supported by the steel pipe rounding machine (1) and the mouth is corresponding, stop. The welding machine is manually controlled to perform sealing welding on the joint at the mouth of the steel pipe (11-2) in the casting section and the docking steel pipe section (11-1).

5. A construction method for a tunnel steel pipe sizing machine according to claim 3; characterized in that: After the complete sealing welding of the joint around the mouth is completed, the sealing welding construction of the joint between the cast section steel pipe (11-2) and the connecting steel pipe section (11-1) is completed. After the sealing welding construction of the joint is completed, the manual operation control cabinet (9) controls the two sets of arc support frames at both ends of the steel pipe rounding machine (1) to retract synchronously through the hydraulic pump station (10), and the steel pipe rounding machine (1) is separated from the sealed welded joint. The manual operation control cabinet (9) controls the active walking mechanism (7) to move towards the mouth through the hydraulic pump station (10). The active walking mechanism (7) drives the steel pipe rounding machine (1) to walk to the support position in the middle of the connecting steel pipe section (11-1) and then stops. The manual operation control cabinet (9) controls the two sets of arc support frames to extend outward synchronously through the hydraulic pump station (10). The two sets of arc support frames provide synchronous circular support in the middle of the connecting steel pipe section (11-1). After the circular support of the connecting steel pipe section (11-1) is completed, the above operation process is repeated for continuous construction.

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