A tunnel inverted arch turnover mold auxiliary ring sliding form rapid pouring device and use method

Abstract

The application discloses a tunnel inverted arch formwork auxiliary ring-shaped slip-form rapid pouring device and a use method thereof. The device comprises a side wall formwork, a side wall form bottom cross beam is fixedly connected to the side wall formwork, a formwork is hinged to the lower end of the side wall form bottom cross beam through a hinge shaft, a fixing seat is arranged at the upper end of the side wall form bottom cross beam, a formwork steel plate with holes is arranged on the formwork, a connecting seat is arranged at the end of the formwork away from the hinge shaft, the connecting seat is connected with one end of a temporary connecting rod, the other end of the temporary connecting rod is connected with the fixing seat, a ring-shaped slip-form is arranged on one side of the formwork, an anti-floating steel plate with holes and an anti-pressure steel plate with holes are arranged on the ring-shaped slip-form, reinforcing cross bars are arranged in the holes of the formwork steel plate with holes, the anti-floating steel plate with holes and the anti-pressure steel plate with holes, a concrete space is formed between the side wall formwork, the formwork and the ring-shaped slip-form and a tunnel primary support surface. The device has the advantages that the ring-shaped slip-form can ensure the compactness of concrete in a small-radius steep slope section, and the pouring of inverted arch concrete to the small-radius steep slope section does not need to wait for the strength of the concrete and can be continuously poured.

Description

Technical Field

[0001] This invention relates to the field of tunnel construction and pouring equipment technology, and more specifically, to a rapid pouring device for circumferential slipform with formwork assistance for tunnel invert arch and its usage method. Background Technology

[0002] Currently, the invert arch and invert arch filling of high-speed tunnels are constructed using a layered casting method. The hydraulic invert arch trestle circumferential slipform process has solved problems such as the smoothness of the invert arch concrete arc structure, insufficient invert arch thickness, and layered casting of filling.

[0003] Several problems still exist in the field application of the existing technology. The circumferential slipform uses high-strength manganese steel, and to ensure rigidity, no vibration windows were reserved. The number of vibration windows reserved in the sidewall formwork is also insufficient, leading to vibration problems in the concrete at the junction of the slipform and sidewall formwork. The insufficient circumferential length of the slipform disturbs the invert concrete during the pouring and vibration of the sidewall concrete, resulting in reluctance to vibrate on-site or long waiting times, artificially creating construction joints. There is an urgent need to improve the circumferential slipform pouring process and tooling to ensure continuous pouring of the invert concrete, thereby improving the efficiency and quality of invert construction.

[0004] In summary, the circumferential slipform process suffers from quality problems such as insufficient concrete compaction due to vibration of the invert concrete in the small-radius steep slope section; and the time required for the invert concrete to reach its strength after pouring into the small-radius steep slope section is also a problem. Summary of the Invention

[0005] The main objective of this invention is to provide a rapid casting device for circumferential slipform in tunnel invert formwork, in order to solve the quality problems of insufficient concrete compaction in the small radius steep slope section due to insufficient vibration of the invert concrete in the existing technology; and the problem of time consumption when waiting for the concrete strength to be reached after the invert concrete is poured to the small radius steep slope section.

[0006] To achieve the above objectives, according to one aspect of the present invention, a rapid casting device for circumferential sliding formwork auxiliary for tunnel invert arch is provided, comprising a sidewall template, a sidewall template bottom beam fixedly connected to the sidewall template, a flip mold hinged to the lower end of the sidewall template bottom beam via a hinge shaft, a fixed seat provided at the upper end of the sidewall template bottom beam, a flip mold perforated steel plate provided on the flip mold, a connecting seat provided at the end of the flip mold away from the hinge shaft, the connecting seat being connected to one end of a temporary connecting rod, the other end of the temporary connecting rod being connected to the fixed seat, a circumferential sliding formwork provided on one side of the flip mold, an anti-buoyancy perforated steel plate and an anti-compression perforated steel plate provided on the circumferential sliding formwork, reinforcing crossbars inserted into the holes of the flip mold perforated steel plate, the anti-buoyancy perforated steel plate and the anti-compression perforated steel plate, and a concrete space being formed between the sidewall template, the flip mold and the circumferential sliding formwork and the tunnel initial support face.

[0007] Preferably, the concrete space includes a side wall concrete space to be poured and an invert arch concrete space. The upper end of the side wall concrete space to be poured is the longitudinal construction joint of the invert arch. An embedded waterstop is provided at the longitudinal construction joint of the invert arch. The junction of the invert arch concrete space and the side wall concrete space to be poured is the concrete pouring surface.

[0008] Preferably, the concrete pouring surface is located on the horizontal plane at the intersection of the flip-form and the circumferential slipform. When the height of the concrete pouring surface is flush with the top of the circumferential slipform, the temporary connecting rod is removed, the flip-form is lowered, and the flip-form is fixed by inserting a reinforcing crossbar into the round holes of the perforated steel plate, the anti-buoyancy perforated steel plate, and the anti-compression perforated steel plate of the flip-form. This forms a closed space at the bottom of the concrete space to be poured for the side wall, and the construction of the concrete to be poured for the side wall begins from the longitudinal construction joint of the invert arch.

[0009] Preferably, the fixing seat is welded to the top surface of the bottom beam of the side wall formwork, the perforated steel plate of the flip mold and the connecting seat are welded to the top surface of the flip mold, and the anti-buoyancy perforated steel plate and the anti-compression perforated steel plate are welded to the top surface of the circumferential sliding mold.

[0010] Preferably, one end of the temporary connecting rod is connected to the connecting seat to pull up the flip-up formwork, and the other end is connected to the fixed seat. When the flip-up formwork is in the flipped-up state, the inverted arch concrete is poured until the surface of the inverted arch concrete is flush with the upper end of the circumferential sliding formwork, and the concrete is fully vibrated.

[0011] Preferably, when the height of the concrete pouring surface is flush with the top of the circumferential slipform, the temporary connecting rod is removed, the flip form is lowered, and the flip form is fixed by inserting the reinforcing crossbar into the round holes of the perforated steel plate, the anti-buoyancy perforated steel plate and the anti-compression perforated steel plate of the flip form, forming a closed structure at the lower end of the concrete space of the side wall to be poured, and then the construction of the concrete of the side wall to be poured begins from the longitudinal construction joint of the invert arch.

[0012] Preferably, the flip-form is set in the small radius arc section of the invert arch to ensure that the circumferential slipform is compacted in the small radius steep slope section, so that the invert arch concrete can be poured continuously into the small radius steep slope section without waiting for the concrete strength.

[0013] Preferably, the circumferential slipform is installed on the large-diameter gentle slope section of the invert arch. The circumferential slipform is used for paving the large-diameter gentle slope section of the invert arch.

[0014] Preferably, the flip-form is set between the side wall formwork and the circumferential slipform. The flip-form assists the circumferential slipform of the inverted arch. The flip-form device is used for pouring the steep slope section of the inverted arch with a small radius, and the circumferential slipform is used for paving the gentle slope section of the inverted arch with a large diameter.

[0015] According to another aspect of the present invention, a method for using a rapid casting device for circumferential slipform assisted in tunnel invert formwork is provided, comprising the following steps:

[0016] Step 1: Weld a fixed seat to the top surface of the bottom beam of the side wall formwork, and weld a hinge shaft to the side. Connect the hinge shaft to the flip formwork. Weld a connecting seat to the perforated steel plate of the flip formwork. Use a temporary connecting rod to pull up and fix the flip formwork so that it is in the flipped state. Pour the inverted arch concrete until the surface of the inverted arch concrete is flush with the top of the circumferential slip formwork. Vibrate the concrete thoroughly.

[0017] Step 2: When the height of the concrete pouring surface is level with the top of the circumferential slipform, remove the temporary connecting rod, lower the flip form, and fix the flip form by inserting the reinforcing crossbar into the round holes of the perforated steel plate, the anti-buoyancy perforated steel plate and the anti-compression perforated steel plate of the flip form, forming a closed space at the bottom of the concrete space to be poured for the side wall. The construction of the concrete to be poured for the side wall begins from the longitudinal construction joint of the invert arch.

[0018] Step 3: Before dismantling the side wall formwork, remove the reinforcing crossbars, pull up the flip formwork, fix the flip formwork with temporary connecting rods, slide the circumferential slip formwork down, move it to the position of the next invert arch, and start the concrete construction of the next invert arch.

[0019] Applying the technical solution of this invention, an invert arch circumferential slipform is used to assist the invert arch with a flip-former. The flip-former device is used for pouring the steep slope section of the invert arch with a small radius, while the circumferential slipform is used for paving the gentle slope section of the invert arch with a large diameter. A fixed seat is welded to the top surface of the bottom beam of the side wall formwork, and a hinge shaft is welded to the side. The hinge shaft is connected to the flip-former. A connecting seat and a perforated steel plate of the flip-former are welded to the flip-former. The flip-former is pulled up and fixed using a temporary connecting rod, so that the flip-former is in the flipped-up state. The invert arch concrete is poured until the surface of the invert arch concrete is flush with the top of the circumferential slipform, and the concrete is fully vibrated. When the height of the concrete pouring surface is flush with the top of the circumferential slipform, the temporary connecting rod is removed, and the flip-former is lowered. The flip-former is fixed by inserting a reinforcing crossbar into the round holes of the perforated steel plate, the anti-buoyancy perforated steel plate, and the anti-compression perforated steel plate of the flip-former, forming a closed space at the bottom of the side wall concrete to be poured. The construction of the side wall concrete to be poured begins from the longitudinal construction joint of the invert arch. Before dismantling the sidewall formwork, the reinforcing crossbars are removed, the flip-form is pulled up, and the flip-form is fixed using temporary connecting rods. The circumferential slipform is then lowered and moved to the position of the next invert arch, and the construction of the next invert arch concrete slab begins. The flip-form auxiliary device solves the quality problem of insufficient concrete compaction caused by vibration of invert arch concrete in small-radius steep slope sections of circumferential slipform. It also avoids the problem of waiting for concrete strength in small-radius steep slope sections, enabling continuous pouring of invert arch concrete under the circumferential slipform process, shortening the invert arch pouring time, and improving the construction efficiency of invert arch. Attached Figure Description

[0020] The accompanying drawings, which form part of this application, are used to provide a further understanding of the invention. The illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute an undue limitation of the invention. In the drawings:

[0021] Figure 1The following is a front view of the tunnel invert arch formwork auxiliary circumferential slipform rapid casting device according to the present invention in the formwork erection state;

[0022] Figure 2 It shows Figure 1 A front view of the tunnel invert arch formwork auxiliary circumferential slipform rapid casting device in the formwork closed state;

[0023] Figure 3 It shows Figure 1 A front view of the invert arch sidewall concrete after the concrete pouring is completed using the tunnel invert arch flipping form auxiliary circumferential slipform rapid pouring device;

[0024] Figure 4 It shows Figure 1 Detailed diagram of the formwork structure of the tunnel invert arch formwork auxiliary circumferential slipform rapid casting device;

[0025] Figure 5 It shows Figure 1 Detailed diagram of the compressive perforated steel plate of the rapid casting device for the circumferential slipform auxiliary formwork of the tunnel invert arch;

[0026] Figure 6 It shows Figure 1 Detailed diagram of the anti-buoyancy perforated steel plate of the tunnel invert arch formwork auxiliary circumferential slipform rapid casting device;

[0027] Figure 7 It shows Figure 1 Detailed drawing of the perforated steel plate of the tunnel invert arch formwork auxiliary circumferential slipform rapid casting device.

[0028] The above figures include the following reference numerals:

[0029] 1. Concrete for the side wall to be poured; 2. Side wall formwork; 3. Side wall formwork bottom beam; 4. Fixing seat; 5. Temporary connecting rod; 6. Connecting seat; 7-1. Perforated steel plate for formwork; 7-2. Perforated steel plate for anti-buoyancy; 7-3. Perforated steel plate for compression; 8. Formwork; 9. Hinge shaft; 10. Reinforcing crossbar; 11. Circumferential slipform; 12. Concrete for the invert arch; 13. Concrete pouring surface; 14. Initial support face of the tunnel; 15. Longitudinal construction joint of the invert arch; 16. Embedded waterstop. Detailed Implementation

[0030] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0031] like Figures 1 to 7As shown, this embodiment of the invention provides a rapid casting device for a tunnel invert arch formwork 8 with an auxiliary circumferential slipform 11, including a sidewall formwork 2. A sidewall formwork bottom beam 3 is fixedly connected to the sidewall formwork 2. A formwork 8 is hinged to the lower end of the sidewall formwork bottom beam 3 via a hinge shaft 9. A fixed seat 4 is provided at the upper end of the sidewall formwork bottom beam. A formwork perforated steel plate 7-1 is provided on the formwork 8. A connecting seat 6 is provided at the end of the formwork 8 away from the hinge shaft 9. The connecting seat 6 is connected to a temporary formwork. One end of the connecting rod 5 is connected to the temporary connecting rod 5, and the other end of the temporary connecting rod 5 is connected to the fixed seat 4. A circumferential sliding mold 11 is provided on one side of the flip mold 8. An anti-buoyancy perforated steel plate 7-2 and an anti-compression perforated steel plate 7-3 are provided on the circumferential sliding mold 11. Reinforcing crossbars 10 are inserted into the holes of the flip mold perforated steel plate 7-1, the anti-buoyancy perforated steel plate 7-2, and the anti-compression perforated steel plate 7-3. A concrete space is formed between the side wall template 2, the flip mold 8, and the circumferential sliding mold 11 and the tunnel initial support face 14.

[0032] In this embodiment, a sidewall template 2 is included, and a sidewall template bottom beam 3 is fixedly connected to the sidewall template 2. A flip mold 8 is disposed between the sidewall template 2 and the circumferential sliding form 11. The lower end of the sidewall template bottom beam 3 is hinged to the flip mold 8 via a hinge shaft 9, and the flip mold 8 is disposed in the arc segment with a small radius of the inverted arch. A fixing seat 4 is provided at the upper end of the sidewall template bottom beam 3, and the fixing seat 4 is welded to the top surface of the sidewall template bottom beam 3. The fixing seat 4 is welded to the top surface of the sidewall template bottom beam 3, and the hinge shaft 9 is welded to the side surface. The hinge shaft 9 is connected to the flip mold 8 via the hinge shaft 9. The flip mold 8 is rotated via the hinge shaft 9 to realize the flipping and closing of the flip mold 8. The connecting seat 6 is welded to the perforated steel plate 7-1 on the flip mold 8. The flip mold 8 is pulled up and fixed using the temporary connecting rod 5, so that the flip mold 8 is in the flipped state. The inverted arch concrete 12 is poured until the surface of the inverted arch concrete 12 is flush with the upper end of the circumferential sliding mold 11. The anti-buoyancy perforated steel plate 7-2 and the anti-compression perforated steel plate 7-3 are welded to the top surface of the circumferential sliding mold 11. The temporary connecting parts are loosened to allow the flip mold 8 to fall. The reinforcing crossbar 10 is inserted into the round holes of the flip mold perforated steel plate 7-1, the anti-buoyancy perforated steel plate 7-2, and the anti-compression perforated steel plate 7-3 to fix the flip mold 8. The side wall concrete is poured. The flip mold 8 is kept stable by the combined action of the reinforcing crossbar 10 and the perforated steel plate.

[0033] In this embodiment, the formwork 8 is provided with a perforated steel plate 7-1. The perforated steel plate 7-1 and the connecting seat 6 are welded to the top surface of the formwork 8. The end of the formwork 8 away from the hinge axis 9 is provided with the connecting seat 6. The connecting seat 6 is connected to one end of the temporary connecting rod 5, and the other end of the temporary connecting rod 5 is connected to the fixed seat 4. One end of the temporary connecting rod 5 is connected to the connecting seat 6 to pull up the formwork 8, and the other end is connected to the fixed seat 4. When the formwork 8 is in the flipped-up state, the invert concrete 12 is poured. The temporary connecting rod 5 uses the perforated steel plate 7-1 to temporarily fix the formwork 8 to the fixed seat 4. The formwork 8 is in the open state. The invert concrete 12 is poured from the open position of the formwork 8 until the concrete pouring surface 13 is flush with the upper end of the circumferential slip form 11, and the concrete is fully vibrated. Remove the temporary connecting rod 5, lower the formwork 8, ensuring the bottom surface of the lower end of the formwork 8 is flush with the bottom surface of the upper end of the circumferential sliding formwork 11. Insert the reinforcing horizontal bar 10 through the round holes in the perforated steel plate 7-1, the anti-buoyancy perforated steel plate 7-2, and the compressive perforated steel plate 7-3 of the formwork. Begin construction of the sidewall concrete 1 to be poured from the longitudinal construction joint 15 of the invert arch. Before dismantling the sidewall formwork 2, remove the reinforcing horizontal bar 10, pull up the formwork 8, fix the formwork 8 using the temporary connecting rod 5, slide down the circumferential sliding formwork 11, and move it to the next invert arch position to begin construction of the next invert arch concrete 12.

[0034] In this embodiment, a circumferential sliding mold 11 is provided on one side of the flip mold 8, and the circumferential sliding mold 11 is located on the large-diameter gentle slope section of the invert arch. The circumferential sliding mold 11 is provided with an anti-buoyancy perforated steel plate 7-2 and an anti-compression perforated steel plate 7-3, which are welded to the top surface of the circumferential sliding mold 11. Reinforcing crossbars 10 are inserted into the holes of the flip mold perforated steel plate 7-1, the anti-buoyancy perforated steel plate 7-2, and the anti-compression perforated steel plate 7-3.

[0035] In this embodiment, a concrete space is formed between the sidewall formwork 2, the flip-form 8, and the circumferential sliding form 11 and the tunnel initial support face 14. The concrete space includes the space for the sidewall concrete 1 to be poured and the space for the invert concrete 12. The upper end of the space for the sidewall concrete 1 to be poured is the longitudinal construction joint 15 of the invert, and a centrally embedded waterstop 16 is provided at the longitudinal construction joint 15 of the invert. The junction of the space for the invert concrete 12 and the space for the sidewall concrete 1 to be poured is the concrete pouring surface 13. The concrete pouring surface 13 is located on the horizontal plane at the intersection of the flip-form 8 and the circumferential sliding form 11. When the height of the concrete pouring surface 13 is flush with the top of the circumferential sliding form 11, the temporary connecting rod 5 is removed, the flip-form 8 is lowered, and the flip-form 8 is fixed by inserting the reinforcing crossbar 10 into the round holes of the flip-form perforated steel plate 7-1, the anti-buoyancy perforated steel plate 7-2, and the anti-compression perforated steel plate 7-3, forming a closed structure at the lower end of the space for the sidewall concrete 1 to be poured.

[0036] In this embodiment, the hinge shaft 9 enables rapid flipping of the formwork 8. The temporary connecting rod 5 secures the formwork 8 when it is flipped up. The reinforcing crossbar 10 passes through the circular holes in the perforated steel plates 7-1, 7-2, and 7-3 of the formwork, preventing the formwork 8 from sinking before the invert concrete 12 is poured and preventing it from floating during the pouring process. The formwork 8 is positioned on the small-radius arc section of the invert, enabling continuous pouring of the invert concrete 12, shortening the invert pouring time, and improving the construction efficiency. The tunnel invert formwork 8 is flipped up and secured using the temporary connecting rod 5 and the reinforcing crossbar 10, making operation convenient.

[0037] Another embodiment of the present invention provides a method for using a rapid pouring device for a tunnel invert arch formwork 8 and an auxiliary circumferential slipform 11, comprising the following steps: Step 1: Weld a fixing seat 4 to the top surface of the side wall formwork bottom beam 3 and a hinge shaft 9 to the side surface. Connect the hinge shaft 9 to the formwork 8. Weld a connecting seat 6 to the formwork perforated steel plate 7-1 on the formwork 8. Use a temporary connecting rod 5 to pull up and fix the formwork 8 so that the formwork 8 is in the flipped state. Pour the invert arch concrete 12 until the surface of the invert arch concrete 12 is flush with the upper end of the circumferential slipform 11. Vibrate the concrete thoroughly. Step 2: When the height of the concrete pouring surface 13 is flush with the top of the circumferential slipform 11, remove the temporary connecting rod 5, lower the formwork 8, and fix the formwork 8 by inserting the reinforcing horizontal bar 10 into the round holes of the perforated steel plate 7-1, the anti-buoyancy perforated steel plate 7-2, and the anti-compression perforated steel plate 7-3 of the formwork. This forms a closed space at the bottom of the concrete space to be poured for the side wall 1, and construction of the concrete space to be poured for the side wall 1 begins from the longitudinal construction joint 15 of the invert arch. Step 3: Before dismantling the side wall formwork 2, remove the reinforcing horizontal bar 10, pull up the formwork 8, fix the formwork 8 using the temporary connecting rod 5, lower the circumferential slipform 11, move it to the position of the next invert arch, and begin construction of the next invert arch concrete 12.

[0038] As can be seen from the above description, the above embodiments of the present invention achieve the following technical effects: the invert arch flipping formwork 8 assists the invert arch circumferential sliding formwork 11. The flipping formwork 8 device is used for pouring the steep slope section of the invert arch with a small radius, and the circumferential sliding formwork 11 is used for paving the gentle slope section of the invert arch with a large diameter. The top surface of the side wall formwork bottom beam 3 is welded with a fixing seat 4, and the side is welded with a hinge shaft 9. The hinge shaft 9 is connected to the flipping formwork 8. The flipping formwork 8 is welded with a connecting seat 6 and a perforated steel plate 7-1. The flipping formwork 8 is pulled up and fixed by a temporary connecting rod 5, so that the flipping formwork 8 is in the flipped state. The invert arch concrete 12 is poured until the surface of the invert arch concrete 12 is flush with the upper end of the circumferential sliding formwork 11, and the concrete is fully vibrated. When the height of the concrete pouring surface 13 is flush with the top of the circumferential slipform 11, remove the temporary connecting rod 5, lower the formwork 8, and fix the formwork 8 by inserting the reinforcing horizontal bar 10 into the round holes of the perforated steel plate 7-1, the anti-buoyancy perforated steel plate 7-2, and the anti-compression perforated steel plate 7-3 of the formwork 8, thus sealing the lower end of the space to be poured for the side wall concrete 1. Construction of the side wall concrete 1 to be poured begins from the longitudinal construction joint 15 of the invert arch. Before dismantling the side wall formwork 2, remove the reinforcing horizontal bar 10, pull up the formwork 8, fix the formwork 8 using the temporary connecting rod 5, lower the circumferential slipform 11, move it to the position of the next invert arch, and begin construction of the next invert arch concrete 12. The flip-form 8 auxiliary device solves the quality problem of insufficient concrete compaction caused by vibration of the invert concrete 12 in the small radius steep slope section of the circumferential slip form 11. At the same time, it avoids the problem of waiting for the concrete strength of the invert concrete 12 to be poured into the small radius steep slope section, realizes the continuous pouring of the invert concrete 12 under the circumferential slip form 11 process, shortens the invert pouring time, and improves the construction efficiency of the invert.

[0039] This invention boasts strong operability: the flip-form 8 is made of high-strength, lightweight material, and its flipping and lowering are achieved using the hinge shaft 9, making operation convenient and highly efficient. It also offers strong applicability: the flip-form 8 is positioned on the small-radius arc segment of the invert arch, avoiding the need for the circumferential sliding form 11 to wait for concrete strength to build up at this location, ensuring continuous pouring of the invert arch. The flip-form 8, in conjunction with the circumferential sliding form 11, facilitates rapid invert arch pouring. Furthermore, it provides good structural stability: before pouring the invert arch sidewall concrete, reinforcing crossbars 10 fix the flip-form 8 to the sliding form, preventing it from floating during concrete pouring and enhancing the structural stability of the flip-form 8. Finally, it offers good economic efficiency: the flip-form 8, in conjunction with the circumferential sliding form 11, enables continuous invert arch pouring, fully vibrating the concrete within the flip-form 8 area, ensuring the compaction of the invert arch concrete 12, shortening the tunnel invert arch construction time, and saving economic costs.

[0040] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A method for using a rapid casting device for circumferential slipform assisted in the formwork flipping of a tunnel invert arch, characterized in that, The tunnel invert arch formwork auxiliary circumferential sliding formwork rapid casting device includes a sidewall template, on which a sidewall template bottom crossbeam is fixedly connected. A formwork is hinged to the lower end of the sidewall template bottom crossbeam via a hinge shaft. A fixed seat is provided at the upper end of the sidewall template bottom crossbeam. A formwork perforated steel plate is provided on the formwork. A connecting seat is provided at the end of the formwork away from the hinge shaft. The connecting seat is connected to one end of a temporary connecting rod. The other end of the temporary connecting rod is connected to the fixed seat. A circumferential sliding form is provided on one side of the formwork. An anti-buoyancy perforated steel plate and a compression perforated steel plate are provided on the circumferential sliding form. Reinforcing crossbars are inserted into the holes of the formwork perforated steel plate, the anti-buoyancy perforated steel plate, and the compression perforated steel plate. A concrete space is formed between the sidewall template, the formwork, and the circumferential sliding form and the tunnel initial support face. The flip-form is set in the arc segment with a small radius of the invert arch for pouring the steep slope segment with a small radius of the invert arch; the circumferential slipform is set in the gentle slope segment with a large diameter of the invert arch for paving the gentle slope segment with a large diameter of the invert arch. The method of using the tunnel invert arch formwork-assisted circumferential slipform rapid casting device includes the following steps: Step 1: Weld a fixing seat to the top surface of the bottom beam of the side wall formwork, and weld a hinge shaft to the side. Connect the hinge shaft to the flip formwork. Weld a connecting seat to the perforated steel plate of the flip formwork. Use a temporary connecting rod to pull up and fix the flip formwork so that the flip formwork is in the flipped state. Pour the inverted arch concrete until the surface of the inverted arch concrete is flush with the upper end of the circumferential slip formwork. Vibrate the concrete thoroughly. Step 2: When the height of the concrete pouring surface is flush with the top of the circumferential slipform, remove the temporary connecting rod, lower the flip form, and fix the flip form by inserting the reinforcing crossbar into the round holes of the perforated steel plate, the anti-buoyancy perforated steel plate and the anti-compression perforated steel plate. This forms a closed space at the bottom of the concrete space to be poured for the side wall. Construction of the concrete to be poured for the side wall begins from the longitudinal construction joint of the invert arch. Step 3: Before dismantling the side wall formwork, remove the reinforcing crossbars, pull up the flip formwork, fix the flip formwork with temporary connecting rods, slide the circumferential slip formwork down, move it to the position of the next invert arch, and start the concrete construction of the next invert arch.

2. The method of using the tunnel invert arch formwork-assisted circumferential slipform rapid casting device as described in claim 1, characterized in that, The concrete space includes the concrete space for the side wall to be poured and the concrete space for the invert arch. The upper end of the concrete space for the side wall to be poured is the longitudinal construction joint of the invert arch. An embedded waterstop is provided at the longitudinal construction joint of the invert arch. The junction of the concrete space for the invert arch and the concrete space for the side wall to be poured is the concrete pouring surface.

3. The method of using the tunnel invert arch formwork-assisted circumferential slipform rapid casting device as described in claim 2, characterized in that, The concrete pouring surface is located on the horizontal plane at the intersection of the flip form and the circumferential slip form.

4. The method of using the tunnel invert arch formwork-assisted circumferential slipform rapid casting device as described in claim 1, characterized in that, The fixed seat is welded to the top surface of the bottom beam of the side wall formwork, the perforated steel plate of the flip mold and the connecting seat are welded to the top surface of the flip mold, and the anti-buoyancy perforated steel plate and the anti-compression perforated steel plate are welded to the top surface of the circumferential sliding mold.

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