A vertical shaft integral lifting formwork and secondary lining construction method

Abstract

The present invention belongs to the technical field of subway wind shelter shaft construction, and particularly relates to a shaft integral lifting formwork and a secondary lining construction method. In the integral formwork, the outer contour is a secondary lining formwork, and a partition wall formwork is provided inside. The integral lifting formwork of the porous shaft is lifted vertically by a hoisting device provided on the ground, and the formwork is used for synchronous casting of the secondary lining and the partition wall in sections. After the casting is completed, the formwork is lifted to a certain height as a whole, and the casting is repeated to finally complete the construction of the secondary lining and the partition wall in the entire shaft. This method can save most of the construction period and greatly solve the equipment rental costs. Compared with the prior art flip mold system, the amount of steel used is greatly reduced, and the shaft structure constructed by this structure does not need to be pre-buried, which reduces the need for later repairs.

Description

Technical Field

[0001] The invention belongs to the technical field of subway wind pavilion shaft or bridge deep foundation pit construction, and in particular relates to a shaft integral lifting formwork and a secondary lining construction method. Background Art

[0002] Currently, subway tunnels are being built deeper to optimize urban land utilization. Ventilation and exhaust systems for waste generated during subway operations and smoke in the event of a fire are primarily provided through vertical wind tunnels. These wind tunnels are typically circular or rectangular in structure, divided into zones by partition walls. These zones are used in conjunction with corresponding smoke exhaust fans to extract smoke from tunnels and stations. For simple, shallow vertical shafts, the construction method is often to erect full-height floor-standing scaffolding and construct a reinforced concrete secondary lining.

[0003] Currently, the primary construction method for vertical shafts with porous wind shelters and partition walls is to first complete the secondary lining using flip or slipforms, followed by the wind shelter partition walls. The formwork platform for partition wall construction is primarily reserved during the secondary lining construction, with holes or embedded components pre-installed. Sectional construction of the partition wall is then performed using steel sections as both the partition wall formwork and construction platforms. The typical single-stage construction height for slipform construction is 1.5m, while for flip form construction, the typical single-stage construction height is 3m. This requires 6m-high (3m per section) formwork supports. Existing construction technology results in high investment, long construction times, and poor safety.

[0004] Existing technology is unable to achieve the integrated lifting of the porous formwork and secondary lining formwork. Flipping the formwork poses significant safety risks, and using two sets of formwork each time doubles the steel consumption and requires a large number of embedded parts. Slipform construction also requires a small construction height, increasing construction time and management costs. Furthermore, the sliding formwork must overcome the friction and deadweight of the formwork and the already cast secondary lining, requiring significant power. Lifting equipment utilization is low, and flipping the formwork requires lifting each formwork piece, requiring numerous crane shifts. The power equipment for slipforms differs from the lifting equipment used in rebar construction, leading to unused equipment. Summary of the Invention

[0005] The purpose of the present invention is to provide a method for constructing a vertical shaft integral lifting formwork and a secondary lining, in order to address the technical defects in the prior art of the inability to synchronously lift the porous formwork and the secondary lining formwork, which results in large steel consumption, slow construction speed, long construction period and high cost.

[0006] In order to achieve the above object, the technical solution adopted by the present invention is:

[0007] A vertical shaft integral lifting formwork includes a secondary lining formwork system, a partition wall formwork system and a truss operating platform, wherein the truss operating platform is arranged between the secondary lining formwork system and the partition wall formwork system; the secondary lining formwork system includes multiple curved formworks with the same structure, and the multiple curved formworks are assembled together to form a ring structure; the partition wall formwork system includes multiple partition wall formworks.

[0008] The technical solution of the present invention provides an integral lifting formwork for porous deep shafts. In the integral formwork, the outer contour is a secondary lining formwork, and a partition wall formwork is provided inside. The integral lifting formwork for the porous shaft is lifted vertically by a hoisting device provided on the ground. The formwork is used for synchronous casting of the secondary lining and the partition wall in sections. After the casting is completed, the formwork is lifted to a certain height as a whole, and the casting is repeated to finally complete the construction of the secondary lining and the partition wall in the entire shaft. This method can save most of the construction period and greatly solve the equipment rental costs. Compared with the prior art flip mold system, the amount of steel used is greatly reduced, and the shaft structure constructed by this structure does not need to be pre-buried, which reduces the need for later repairs.

[0009] In the technical solution of the present invention, the outline of the shaft is circular, and the internal partition wall is in the shape of a "cross". The partition wall vertically divides the shaft into four through spaces. The annular structure corresponds to the outline of the shaft. The space between the annular structure and the shaft is used to pour concrete to form an annular secondary lining structure. The multi-hole deep shaft integral lifting formwork is vertically lifted by a hoisting device set above the ground. The formwork is used for synchronous pouring of the secondary lining and the partition wall in sections. After pouring is completed, the formwork is lifted to a certain height as a whole, and the synchronous pouring of the next section of the secondary lining and the partition wall is repeated, finally completing the construction of the secondary lining and the partition wall in the entire shaft. This structure can be used for the synchronous pouring of the secondary lining and the partition wall. The overall structure is simple. The secondary lining formwork system and the partition wall system are connected into an organic whole through a truss operating platform. The unit construction height is increased, and the formwork can be reused. There is no need for comprehensive disassembly. It only needs to cooperate with the ground hoisting system to achieve overall lifting. It greatly shortens the construction period and equipment costs.

[0010] The space between the oppositely arranged partition wall formworks is the casting space for the partition wall body. More preferably, the partition wall formwork system includes multiple partition wall formworks, and a plurality of tie rods are arranged between the oppositely arranged partition wall formworks.

[0011] Preferably, the secondary lining formwork system is divided into multiple arc formworks according to the number of holes in the shaft; a first fixed structure is provided between adjacent arc formworks, and the first fixed structure is provided at the upper position of the adjacent arc formworks; a second fixed structure is provided at both ends of each arc formwork, and the second fixed structure is provided at intervals along the height direction of the arc formworks. The number of arc formworks can be set accordingly according to the design of the partition wall in the shaft. The arc formworks are partition wall structures, and the tops of adjacent arc formworks are connected by a first fixed structure. The first fixed structure includes an I20 I-beam structure, which is connected to the arc formwork by bolts. The second fixed structure is used to fix to the already cast partition wall structure to ensure that the overall force of the secondary lining formwork system is uniform. The second fixed structure includes a wedge block or a manually adjusted screw.

[0012] Preferably, the curved template includes a curved panel, and a plurality of vertical reinforcing ribs are arranged at intervals along the arc direction on the side of the curved panel facing away from the second lining structure, and a plurality of transverse stiffening plates are arranged at intervals along the vertical direction between adjacent vertical reinforcing ribs. A plurality of back bars with the same curvature as the curved panel are also arranged on the side of the curved panel facing away from the second lining.

[0013] More preferably, the vertical height of the curved formwork is 20-30 cm longer than the height of the second lining of a single pour.

[0014] Preferably, the truss-type operating platform includes a first operating platform and a second operating platform arranged from bottom to top, with a truss rod connection structure disposed between the first and second operating platforms. The first operating platform is located at the bottom of the curved template, and the second operating platform is located at the top of the curved template. The truss rod connection structure includes a plurality of nearly vertically arranged I-beams.

[0015] Preferably, the vertical shaft integral lifting formwork also includes a plurality of demoulding components, and the demoulding components are arranged between the first operating platform and the arc formwork. The demoulding components are used to realize the separation between the arc formwork and the secondary lining structure, and at least two demoulding components are correspondingly arranged on each of the arc formworks.

[0016] Further preferably, the demolding assembly includes a first fixed rod and a second fixed rod, wherein the first fixed rod is connected to the curved template. Further preferably, the first fixed rod is welded to two upper and lower adjacent back bars. The second fixed rod is connected to the first operating platform via a sliding guide rail, and a drive device is provided at the end of the second fixed rod away from the first fixed rod. Activating the drive device can cause the curved template to translate. The sliding device includes a hydraulic system or a screw structure.

[0017] More preferably, an oblique brace is provided between the first fixing rod and the second fixing rod, and the three together form a triangular structure, thereby improving the stability of the demoulding assembly as a whole.

[0018] The first operating platform includes multiple sub-platform units, the number of which matches the number of the arc-shaped templates. Partition wall templates are set between adjacent sub-platform units, and each sub-platform unit is connected to the second operating platform through multiple truss rods.

[0019] In the technical solution of the present invention, there are four sub-platform units, and the space between the four sub-platform units is the partition wall space.

[0020] A secondary lining construction method, comprising the above-mentioned vertical shaft integral lifting formwork, specifically comprises the following steps:

[0021] Step 1: Place the vertical shaft integral lifting formwork at a target position in the vertical shaft to be constructed by a hoisting device arranged on the ground;

[0022] Step 2: Perform simultaneous concrete pouring of the secondary lining structure and partition wall structure at the target location;

[0023] Step 3: Curing with formwork until the concrete solidifies and then removing the formwork;

[0024] Step 4: After the vertical shaft integral lifting formwork is lifted upward to the target position by the hoisting device, the operations of steps 2-3 are repeated until the secondary lining construction of the entire vertical shaft is completed.

[0025] Preferably, in step 1, after the vertical shaft integral lifting formwork is hoisted to the target position, the first operating platform is adjusted to be fixed to the cast partition wall structure using square timber or adjustable diagonal braces; the demoulding assembly between each of the arc-shaped formwork and the first operating platform is adjusted so that the arc-shaped formwork is pressed against the cast partition wall structure; adjacent arc-shaped formworks are connected by a first fixed structure, and both sides of the arc-shaped formworks are fixed to the cast partition wall structure by a second fixed structure.

[0026] Further preferably, after step 2 is completed, it also includes the steel bar binding of the next section of the concrete area to be poured, including vertical steel bars and line-changing steel bars; after completing the steel bar binding work, the first fixed structure in step 1 is removed, and the fixing of the first operating platform and the poured partition wall structure is removed.

[0027] In summary, due to the adoption of the above technical solution, the beneficial effects of the present invention are:

[0028] The technical solution of this invention features a vertical shaft integral lifting formwork structure. A truss operating platform connects the secondary lining formwork and partition wall formwork into a single unit. By lifting the formwork, the secondary lining and partition wall structures can be constructed simultaneously. The entire structure is then hoisted to the next pouring position. This structure can halve construction time and equipment rental costs. In this solution, a single pour height of no less than 3 meters is achieved, reducing steel usage by half compared to existing overmolding systems, thereby saving costs.

[0029] In the technical solution of the present invention, the integral lifting formwork is utilized in conjunction with lifting equipment to realize formwork lifting and hoisting during structure construction, fully utilizing the utilization rate of mechanical equipment and reducing equipment idleness. In addition, the space occupancy rate of the lifting equipment in the present invention is low.

[0030] In the technical solution of the present invention, the integral lifting formwork system is fully enclosed, ensuring operator safety. The integral lifting formwork of the present invention can be structurally adjusted to suit the number of holes in the shaft or the structure of the partition wall, and is reusable. The technical solution of the present invention is widely applicable to lining construction in subway shafts or deep bridge foundation pits. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 It is a schematic diagram of the top view of the vertical shaft structure of the present invention;

[0032] Figure 2 It is a structural schematic diagram of the construction process of the integral lifting formwork of the present invention;

[0033] Figure 3 It is a structural schematic diagram of the integral lifting formwork of the present invention;

[0034] Figure 4 It is a BB cross-sectional view of the present invention;

[0035] Figure 5 It is an AA cross-sectional view of the present invention;

[0036] Figure 6 1 is a schematic structural diagram of the integral lifting formwork of the present invention in step 1;

[0037] Figure 7 It is a structural diagram of the arc template;

[0038] Figure 8 It is a side view structural diagram of the arc template;

[0039] Figure 9 It is a schematic diagram of the secondary lining construction process;

[0040] Icon: 100-secondary lining structure; 200-partition wall structure;

[0041] 1-arc-shaped formwork; 101-first fixed structure; 102-second fixed structure; 11-arc-shaped panel; 12-vertical reinforcement ribs; 13-transverse stiffeners; 14-back bar; 2-partition wall formwork; 3-truss-type operating platform; 31-first operating platform; 311-sub-platform unit; 32-second operating platform; 33-truss piece connection structure; 34-third operating platform, 35-shoulder beam; 4-demolding assembly; 41-first fixed rod; 42-second fixed rod; 43-diagonal brace; 44-drive device; 45-sliding guide rail; 5-gantry crane; 6-first steel wire rope; 16-second steel wire rope; 7-square timber; 8-pump truck, 9-rebar. DETAILED DESCRIPTION

[0042] The present invention will be described in detail below with reference to the accompanying drawings.

[0043] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0044] Example 1

[0045] A multi-hole deep shaft integral lifting formwork is specifically applied to a "cross" shaped partition wall structure, such as Figure 1-9 As shown, the secondary lining structure 100 in the shaft is a cylindrical structure. The "cross"-shaped partition wall structure 200 inside the secondary lining structure 100 divides the shaft into four independent hole spaces. The lifting formwork includes a secondary lining formwork system, a partition wall formwork system and a truss-type operating platform 3. The truss-type operating platform 3 is used to connect the secondary lining formwork system and the partition wall formwork system.

[0046] More specifically, the second lining formwork system includes multiple curved formworks 1 with the same structure. The second lining formwork system of this embodiment includes four curved formworks 1 with the same structure. The four curved formworks 1 are assembled together to form a circular structure. Adjacent curved formworks 1 are threadedly connected by a first fixing structure 101. The first fixing structure 101 is arranged at the upper position of the curved formwork 1. The first fixing structure 101 is mainly an I20 I-beam. The upper parts of the four curved formworks 1 are connected into a whole by the I-beam. The lower part of the side of the curved formwork 11 is separated by a partition wall structure 200. A second fixing structure 102 is arranged between the curved formwork 1 and the partition wall structure. The second fixing structure 102 is arranged in multiple pieces in the vertical direction. The second fixing structure 102 is a wedge block structure or a manually adjusted screw structure. It can flexibly achieve fixation with the partition wall structure.

[0047] The first fixing structure 101 and the second fixing structure 102 jointly ensure that the secondary lining formwork system maintains a ring state and has good force resistance, and no relative displacement occurs in the plane position.

[0048] More specifically, the curved template 1 includes a curved panel 11, on which a plurality of vertical reinforcing ribs 12 are arranged at intervals along the arc direction on the side facing away from the secondary lining structure 100, and a plurality of transverse stiffening plates 13 are arranged at intervals along the vertical direction between adjacent vertical reinforcing ribs 12. On the side facing away from the secondary lining structure 100, a plurality of back bars 14 having the same curvature as the curved panel 11 are also arranged. Figure 3 As shown, the various components of the curved formwork 1 are connected by welding. Specifically, the curved panel 11 is generally made of 5mm thick steel plate, the vertical reinforcement ribs 12 are generally made of C10 channel steel, the transverse stiffeners 13 and 13 are generally made of 12mm thick steel plate, and the back bar 14 is generally made of 12mm thick steel plate welded with HN400×200 H-shaped steel lining, or directly bent from hot-rolled H-shaped steel.

[0049] More specifically, in this embodiment, the spacing between adjacent vertical reinforcement ribs 12 is 350 mm. The vertical height of the curved formwork 1 is 20-30 cm greater than the height of the secondary lining poured in a single pass. In this embodiment, the height of the curved panel 11 is set to 3.2-3.3 m. Based on a single concrete pour height of 3 m, a margin of 0.2-0.3 m is provided for the curved panel 11 to overlap with the already poured secondary lining structure.

[0050] The truss operating platform 3 comprises a first operating platform 31 and a second operating platform 32 from bottom to top, with a truss plate connection structure 33 provided between the first operating platform 31 and the second operating platform 32. The truss operating platform 3 is generally constructed by welding I20 I-beams.

[0051] The first operating platform 31 and the second operating platform 32 are generally paved with patterned steel plates or safety springboards as safety protection for platform personnel, and welded steel ladders are generally used for upper and lower passages.

[0052] The first operating platform 31 is mainly used as an operating platform and a poured concrete repair platform; the first operating platform 31 includes multiple sub-platform units 311, the number of the sub-platform units 311 matches the number of the curved formwork 1, and partition wall formwork 2 is set between adjacent sub-platform units 311. Each sub-platform unit 311 is connected to the second operating platform 32 through multiple truss plate connection structures 33.

[0053] The second operating platform 32 is mainly used as an operating platform during concrete pouring and as a platform for tying some steel bars 9;

[0054] A third operating platform 34 is also located above the second operating platform 32. This platform is primarily used for temporarily stacking and tying the rebar 9, and also serves as a temporary anchor for the rebar 9 during tying. The third operating platform 34 is welded to the second operating platform 32 in a tripod configuration. It is typically welded at intervals of 1-2 meters, consistent with the arc length of the secondary lining formwork. A checkered steel plate is typically laid above as a safety passage.

[0055] More specifically, several demolding assemblies 4 are positioned between the secondary lining formwork system and the truss-type operating platform 3; at least two demolding assemblies 4 are positioned on each curved formwork 1. In this embodiment, two demolding assemblies 4 are positioned on each curved formwork 1. All demolding assemblies 4 are oriented in the normal direction of the arc-shaped secondary lining formwork, facilitating the removal of the formwork during later construction.

[0056] The demoulding assembly 4 is used to separate the curved formwork 1 from the secondary lining structure 100. Specifically, the demoulding assembly 4 includes a vertically arranged first fixing rod 41, a horizontally arranged second fixing rod 42, and a diagonal brace 43 connecting the first fixing rod 41 and the second fixing rod 42. The first fixing rod 41, the second fixing rod 42, and the diagonal brace 43 are welded to form a right triangle. The first fixing rod 41 is connected to the secondary lining formwork system. Specifically, the first fixing rod 41 is an I20 I-beam, and the two ends of the first fixing rod 41 are respectively welded to two upper and lower adjacent back bars 14.

[0057] A sliding device is provided between the second fixing rod 42 and the first operating platform 31. In this embodiment, the sliding device is a hydraulic system. Furthermore, a T-shaped slide is provided on the first operating platform 31, and the second fixing rod 42 is slidably engaged with the T-shaped slide.

[0058] The partition wall formwork 2 adopts a wooden formwork or a polymer plastic steel formwork, and the partition wall formwork 2 mainly adopts a tie rod to bear the lateral force.

[0059] Example 2

[0060] A construction method for a secondary lining in a porous deep vertical shaft comprises the following steps:

[0061] Step 1. Place the integral lifting formwork of the shaft at the target position in the shaft to be constructed by a hoisting device set at a ground position; in this embodiment, the hoisting device is a gantry crane 5. In step 1, after the integral lifting formwork of the shaft is hoisted at the target position, the integral lifting formwork of the shaft and the gantry crane 5 are connected by a second steel wire rope 16; the second steel wire ropes are respectively set in four directions, with two being set in each direction, and the first operating platform 31 is adjusted to be fixed to the cast partition wall structure using square wood 7 or adjustable diagonal braces 43; adjust the demoulding assembly 4 between each of the arc formwork 1 and the first operating platform 31 so that the arc formwork 1 is pressed against the cast partition wall structure; adjacent arc formworks 1 are connected by a first fixing structure 101, and both sides of the arc formwork 1 are fixed to the cast partition wall structure by a second fixing structure 102, so as to realize the ring-shaped force and positioning of the integral lifting formwork of the shaft and the cast structure;

[0062] Step 2: Perform simultaneous concrete pouring of the secondary lining structure and partition wall structure at the target location; Figure 9 As shown, during the pouring process, concrete is poured to the target location through a pipeline by a pump truck 8 set on the ground;

[0063] After step 2 is completed, the steel bars 9 of the next section to be poured into the concrete area are also tied, including vertical steel bars and line-changing steel bars; after the steel bar 9 tying work is completed, the first fixed structure 101 in step 1 is removed, and the fixing of the first operating platform 31 and the poured partition wall structure is removed.

[0064] Specifically, the height of the vertical reinforcement is greater than the height of the concrete pouring, so that the reinforcement 9 of the next section to be poured with concrete can be tied during the stage of curing the current section of concrete.

[0065] Step 3: Curing with formwork until the concrete solidifies and then removing the formwork;

[0066] Step 4: After the vertical shaft integral lifting formwork is lifted upward to the target position by the hoisting device, Figure 6 As shown, steps 2-3 are repeated until the secondary lining of the entire shaft is completed. In this step, a first steel wire rope 6 is provided below the gantry crane 5 and is connected to the shoulder beam 35 provided between the third operating platforms 34 to further ensure the force balance during the hoisting process of the entire shaft hoisting formwork.

[0067] In the construction scheme for the secondary lining in the shaft of this embodiment, the concrete of the secondary lining structure and the partition wall structure is constructed simultaneously, effectively halving the construction period. The formwork system of this application reduces the steel consumption by half compared to the existing flip form system, effectively reducing construction costs. In the technical solution of the present invention, the wind pavilion shaft does not need to be pre-buried, reducing the need for later repair work. The overall structure is a fully enclosed annular state, greatly improving the safety of operators.

[0068] 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 scope of protection of the present invention.

Claims

1. A vertical shaft integral lifting formwork, characterized in that: The invention comprises a secondary lining formwork system, a partition wall formwork system and a truss-type operating platform (3), wherein the truss-type operating platform (3) is arranged between the secondary lining formwork system and the partition wall formwork system; the secondary lining formwork system comprises a plurality of arc-shaped formworks (1) of the same structure, wherein the plurality of arc-shaped formworks (1) are assembled together to form an annular structure, and the secondary lining formwork system is divided into a plurality of arc-shaped formworks (1) according to the number of inner holes of the shaft; a first fixing structure (101) is arranged between adjacent arc-shaped formworks (1), and the first fixing structure (101) is arranged at the upper position of the adjacent arc-shaped formworks (1); the partition wall formwork system comprises a plurality of partition wall formworks (2); the truss-type operating platform (3) comprises a first operating platform (31) and a second operating platform (32) arranged from bottom to top, and a truss rod connecting structure is arranged between the first operating platform (31) and the second operating platform (32); the shaft integral lifting formwork further comprises The invention relates to a method for manufacturing a multi-hole vertical shaft integral lifting formwork, wherein the multi-hole vertical shaft integral lifting formwork is provided with a plurality of demoulding assemblies (4), wherein the demoulding assemblies (4) are arranged between the first operating platform (31) and the arc formwork (1), and the demoulding assemblies (4) are used to separate the arc formwork (1) from the secondary lining structure, and at least two demoulding assemblies (4) are correspondingly arranged on each arc formwork (1); the demoulding assemblies (4) include a first fixed rod (41) and a second fixed rod (42) which are fixedly connected, wherein the first fixed rod (41) is connected to the arc formwork (1), and the second fixed rod (42) is connected to the first operating platform (31) via a sliding guide rail (45), and a driving device (44) is provided at an end position of the second fixed rod (42) away from the first fixed rod (41); the multi-hole vertical shaft integral lifting formwork is vertically lifted by a hoisting device arranged on the ground, and the formwork is used for synchronously pouring the secondary lining and the partition wall in sections, and the hoisting device is a gantry crane.

2. The integral shaft lifting formwork according to claim 1, characterized in that: A second fixing structure (102) is provided at both ends of each of the arc-shaped templates (1), and the second fixing structures (102) are arranged at intervals along the height direction of the arc-shaped template (1).

3. The integral shaft lifting formwork according to claim 2, characterized in that: The arc-shaped template (1) comprises an arc-shaped panel (11), a plurality of vertical reinforcing ribs (12) are arranged at intervals along the arc direction on the side of the arc-shaped panel (11) facing away from the secondary lining structure, a plurality of transverse stiffening plates (13) are arranged at intervals along the vertical direction between adjacent vertical reinforcing ribs (12), and a plurality of back bars (14) having the same curvature as the arc-shaped panel (11) are also arranged on the side of the arc-shaped panel (11) facing away from the secondary lining.

4. The integral shaft lifting formwork according to claim 1, characterized in that: The first operating platform (31) includes a plurality of sub-platform units (311), the number of the sub-platform units (311) matches the number of the arc-shaped templates (1), partition templates (2) are arranged between adjacent sub-platform units (311), and each sub-platform unit (311) is connected to the second operating platform (32) via a plurality of truss rods.

5. A secondary lining construction method in a vertical shaft, characterized in that: The construction method using the vertical shaft integral lifting formwork according to any one of claims 1 to 4 comprises the following steps: Step 1: Place the vertical shaft integral lifting formwork at a target position in the vertical shaft to be constructed by a hoisting device arranged on the ground; Step 2: Perform simultaneous concrete pouring of the secondary lining structure and partition wall structure at the target location; Step 3: Curing with formwork until the concrete solidifies and then removing the formwork; Step 4: After the vertical shaft integral lifting formwork is lifted upward to the target position by the hoisting device, the operations of steps 2-3 are repeated until the secondary lining construction of the entire vertical shaft is completed.

6. The secondary lining construction method in a vertical shaft according to claim 5, characterized in that: In step 1, after the vertical shaft integral lifting formwork is hoisted to the target position, the first operating platform (31) is adjusted and fixed to the cast partition wall structure using square wood (7) or adjustable diagonal braces (43); the demoulding assembly (4) between each of the arc-shaped templates (1) and the first operating platform (31) is adjusted so that the arc-shaped template (1) is pressed against the cast partition wall structure; adjacent arc-shaped templates (1) are connected by a first fixing structure (101), and both sides of the arc-shaped template (1) are fixed to the cast partition wall structure by a second fixing structure (102).

7. The secondary lining construction method in a vertical shaft according to claim 6, characterized in that: After step 2 is completed, the method further includes tying the steel bars (9) of the next section of the concrete area to be poured, wherein the steel bars (9) include vertical steel bars and line-changing steel bars; after completing the tying of the steel bars (9), the first fixed structure (101) in step 1 is removed, and the fixing of the first operating platform (31) and the poured partition wall structure is removed.

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