Overall slip form one-time lifting construction method for large-diameter deep shaft gradual change surface structure

Abstract

The invention discloses a one-time lifting construction method for an integral slip form of a large-diameter deep shaft gradual change surface structure. The one-time lifting construction method comprises the steps that firstly, finished reinforcing steel bars are hoisted to the bottom of a construction pit and are bound and fixed; then, slip form equipment is installed in the construction pit of the deep shaft, the slip form equipment comprises a formwork structure of the water inlet forebay, formwork structures of the multiple working bins and a climbing system, and the formwork structure of the water inlet forebay comprises a fixed formwork, a movable formwork and an adjusting formwork; a deep shaft main body head section is formed by pouring concrete into the construction pit; then a section of finished reinforcing steel bar is hoisted and put down and bound, then the slip form equipment climbs upwards, the distance between the movable formwork and the working chamber formwork structure is gradually reduced, the steps are repeated, and finally the deep shaft main body and the middle partition wall structure are formed, and the cross section of the middle partition wall structure is gradually narrowed from bottom to top. The construction efficiency of the deep shaft is improved, and concrete and steel bar material consumption is reduced.

Description

Technical Field

[0001] The present application relates to the field of shaft construction, and in particular to a one-time lifting construction method of an integral sliding formwork for a large-diameter deep shaft with a gradual surface structure. Background Art

[0002] The raw water pipe project of the water plant is mainly to solve the problem of insufficient water supply in the city. By setting up a water intake tower at the location of the reservoir, constructing vertical shafts at multiple locations in the city and connecting them with pipelines, the water intake tower pumps water to the adjacent vertical shaft, and the water source is transported to the vertical shafts at various locations in the city through pipelines. Pump stations are arranged in the vertical reinforcement to pump out the water in the vertical shaft and use it for urban water use. The vertical shaft near the water intake tower has a large diameter and a large depth, and is also used as the TBM starting well. The large-diameter deep vertical shaft can include a water intake forebay, a drainage pump room, a stairwell, an elevator shaft, and a ventilation shaft according to functional zoning.

[0003] In the construction steps of a large-diameter deep vertical shaft, the outline of the vertical shaft is first installed at the construction position of the large-diameter deep vertical shaft for continuous wall construction to enclose the vertical shaft construction area, and then the soil inside the vertical shaft is excavated to form a vertical shaft construction pit, and then the formwork is erected and concrete is poured to finally form a large-diameter deep vertical shaft with multiple chambers, among which the water inlet front pool is separated from other working chambers by a middle partition wall.

[0004] Regarding the above-mentioned related technologies, there are the following defects: in actual deep shaft applications, the deeper the deep shaft is, the greater the water pressure is, so the middle partition wall also needs to be thicker accordingly to improve the structural strength of the middle partition wall, but this also requires a large amount of concrete and steel materials, and the material cost is high. In addition, the installation and disassembly steps of conventional formwork are cumbersome, which affects the overall construction efficiency of the deep shaft, so there is still room for improvement. Summary of the invention

[0005] In order to improve the efficiency of deep shaft construction and reduce the amount of concrete and steel bar materials used, the present application provides a large-diameter deep shaft gradient surface structure integral sliding formwork one-time lifting construction method.

[0006] The present application provides a large-diameter deep shaft gradient surface structure integral sliding formwork one-time lifting construction method adopts the following technical solution: A one-time lifting construction method of an integral sliding formwork for a large-diameter deep shaft with a gradual surface structure, comprising: S1: Arrange the material discharge pipe around the construction pit of the deep shaft, and hang the finished steel bars to the bottom of the construction pit and tie them up; S2: After the first section of steel bar binding is completed, a slipform device is installed in the construction pit of the deep shaft. The slipform device includes a template structure of the water inlet forebay, template structures of multiple working chambers, and a climbing system. The construction gap between the outer side of the template structure of the water inlet forebay and the inner wall of the deep shaft construction pit and the construction gap between the outer side of the working chamber template structure and the inner wall of the deep shaft construction pit are used for casting to form the deep shaft main body. The construction gap between the template structure of the water inlet forebay and the template structures of multiple working chambers is used for casting to form the middle partition wall. The template structure of the water inlet forebay includes a fixed template, a movable template, and an adjustable template. The fixed template extends along the inner wall contour of the deep shaft construction pit, the movable template extends along the length direction of the middle partition wall, and the adjustable template is used to block the gap between the movable template and the fixed template. The fixed template, the movable template, and the adjustable template are enclosed together to form a circumferentially closed template structure of the water inlet forebay. S3: pouring concrete into the construction pit of the deep shaft through the down pipe to form the first section of the deep shaft; S4: After the concrete reaches a certain strength, a section of finished steel bars is lowered and tied and fixed. Then, the slipform equipment climbs upward under the driving action of the climbing system, so that the outer side of the movable formwork of the slipform equipment is always in close contact with the side wall of the cast concrete structure. Then, the position of the movable formwork is adjusted in the direction away from the fixed formwork to reduce the distance between the movable formwork and the working chamber formwork structure. Then, the position of the adjustment formwork is adjusted accordingly to fill the gap between the movable formwork and the fixed formwork to maintain the sealing state of the water inlet front pool formwork structure. S5: Repeat S3 and S4, and finally form a deep shaft body in the construction pit, and a middle partition wall structure with a gradually changing thickness between the working chamber and the water intake front pool, and the cross section of the middle partition wall structure gradually narrows from bottom to top.

[0007] By adopting the above technical scheme, a climbing formwork device is manufactured for a deep shaft multi-chamber structure, wherein the formwork structure corresponding to the water inlet front pool is composed of a fixed formwork, a movable formwork and an adjustable formwork, and the movable formwork can move relative to the fixed formwork. As the sliding formwork equipment is gradually lifted, the distance between the movable formwork and the working chamber formwork structure becomes smaller, and the thickness of the middle partition wall formed by casting also gradually decreases, so that the middle partition wall can adapt to the water pressure of the corresponding depth, reduce the amount of concrete and steel materials, and reduce material costs. The deformable sliding formwork equipment can be changed instantly with the climbing height, which is conducive to improving the construction efficiency of the deep shaft.

[0008] Preferably, in the slipform equipment installation step of S2, a supporting truss is installed on the inner side of the fixed formwork, and a heightening truss is installed on the top of the supporting truss and on the top of multiple working chamber formwork structures, and the fixed formwork and multiple working chamber formwork structures are fixed by the heightening truss.

[0009] By adopting the above technical solution, the supporting truss reinforces the fixed formwork with a large bending range, and at the same time serves as a connecting member to cooperate with the heightening truss to complete the purpose of connecting the fixed formwork with multiple working chamber formwork structures, so that the relative position of the fixed formwork and the multiple working chamber formwork structures remains stable, and together they serve as the main frame of the slipform equipment, which is beneficial to improving the overall structural stability of the slipform equipment.

[0010] Preferably, in the slipform equipment installation step of S2, several groups of adjusting cylinders distributed vertically are hingedly installed at the supporting truss, and the telescopic ends of the adjusting cylinders are hingedly installed on the inner side of the movable formwork, and the adjusting cylinders are used to adjust the position and angle of the movable formwork.

[0011] By adopting the above technical solution, the movable template can be moved under the telescopic action of the adjusting cylinder, and the inclination angle of the movable template can be changed at the same time, so as to form the inclined side wall of the middle partition wall and the gradual surface structure of the middle partition wall.

[0012] Preferably, the adjustment template includes an adjustment block and an arc-edge adjustment mold and a straight-edge adjustment mold respectively arranged on both sides of the adjustment block; an adjustment mechanism is installed between the fixed template and the adjustment block and between the movable template and the adjustment block, for adjusting the position and angle of the movable template between the fixed template and the movable template; the inner side of the straight-edge adjustment mold is sealed tightly against the outer side of the movable template, and the arc-edge adjustment mold is sealed tightly against the outer side of the fixed template; in the movable template displacement step S4, the adjustment block moves and adjusts under the guidance of the guide beam, the straight-edge adjustment mold slides on the outer side of the movable template, and the arc-edge adjustment mold slides on the outer side of the fixed template, so that the gap between the ends of the movable template and the fixed template is always kept in a closed state.

[0013] By adopting the above technical scheme, the adjustment block in the adjustment template is used as a movable part, and the adjustment mechanism is used to adjust the angle and position of the movable block. At the same time, the arc edge adjustment mold and the straight edge adjustment mold are cooperated to achieve the sealed connection between the fixed template and the movable template. While improving the flexibility of the adjustment template, the straight edge adjustment mold and the outer side of the movable template are kept in close contact, and the arc edge adjustment mold and the outer side of the fixed template are kept in close contact, so that the gap between the ends of the movable template and the fixed template is always kept in a closed state, which is beneficial to improving the deformation stability and adjustment efficiency of the sliding template equipment.

[0014] Preferably, in the slipform equipment installation step of S2, the climbing system includes a plurality of climbing poles and a plurality of climbing jacks used in conjunction with the climbing poles, the plurality of climbing poles are vertically arranged in the construction pit of the deep shaft and distributed circumferentially, and the climbing jacks are installed on the top of the slipform equipment.

[0015] By adopting the above technical solution, multiple climbing jacks are used in conjunction with multiple climbing poles, which is beneficial to the stable climbing of the slipform equipment.

[0016] Preferably, a hand chain hoist is slidably connected to the bottom of the heightened truss, and the top of the movable template is fixedly connected to the traction end of the hand chain hoist.

[0017] By adopting the above technical solution, the hand winch serves as a connecting member between the movable formwork and the heightening truss, and the load of the movable formwork can be transferred to the heightening truss, which is beneficial to improving the stability of the movable formwork. At the same time, the hand winch can move with the movable formwork, and the height of the movable formwork can be adjusted by pulling the hand winch, which is beneficial to improving the adjustment flexibility of the movable formwork.

[0018] Preferably, an operating platform is installed at the bottom of the supporting truss, and the operating platform is close to the side wall of the middle partition wall and the inner wall of the deep shaft body.

[0019] By adopting the above technical solution, an operating platform is installed at the bottom of the supporting truss to facilitate concrete curing, surface trimming, embedded parts processing and door opening formwork removal.

[0020] Preferably, the operating platform includes a suspension rod and an auxiliary plate. When installing the operating platform below the movable formwork, one pair of the suspension rods is fixedly installed on the inner side of the bottom of the movable formwork, and the other pair of suspension rods is slidably installed on the bottom of the supporting truss.

[0021] By adopting the above technical solution, the hanger serves as a connecting member between the movable formwork and the auxiliary plate, which can transfer the load of the movable formwork to the movable formwork and the supporting truss, which is beneficial to improving the stability of the auxiliary plate. At the same time, the hanger on the supporting truss can move with the movement of the movable formwork, which is beneficial to improving the flexibility of the operating platform.

[0022] In summary, the present application includes at least one of the following beneficial technical effects: 1. Climbing formwork equipment is made for the multi-chamber structure of the deep shaft. The formwork structure corresponding to the water inlet forebay is composed of a fixed formwork, a movable formwork and an adjustable formwork. The movable formwork can move relative to the fixed formwork. As the sliding formwork equipment is gradually lifted, the distance between the movable formwork and the working chamber formwork structure becomes smaller, and the thickness of the middle partition wall formed by pouring also gradually decreases, so that the middle partition wall can adapt to the water pressure of the corresponding depth, reduce the amount of concrete and steel materials, and reduce material costs. The deformable sliding formwork equipment can be changed instantly with the climbing height, which is conducive to improving the construction efficiency of the deep shaft; 2. By setting the adjusting oil cylinder, the movable template can be moved under the telescopic action of the adjusting oil cylinder, and the inclination angle of the movable template can be changed at the same time, so as to form the inclined side wall of the middle partition wall and the gradual surface structure of the middle partition wall; 3. The adjustment block in the adjustment template is a movable part. The adjustment mechanism is used to adjust the angle and position of the movable block. At the same time, the arc-edge adjustment mold and the straight-edge adjustment mold are used to achieve a sealed connection between the fixed template and the movable template. While improving the flexibility of the adjustment template, the straight-edge adjustment mold and the outer side of the movable template are kept in close contact, and the arc-edge adjustment mold and the outer side of the fixed template are kept in close contact, so that the gap between the ends of the movable template and the fixed template is always kept in a closed state, which is beneficial to improving the deformation stability and adjustment efficiency of the sliding template equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a vertical cross-sectional view of a deep vertical shaft in a large-diameter deep vertical shaft gradient surface structure integral sliding formwork one-time lifting construction method according to an embodiment of the present application.

[0024] Figure 2 The present invention relates to a large-diameter deep shaft gradient surface structure integral sliding formwork one-time lifting construction method. Figure 1 AA view of the main body of the deep shaft at the location shown.

[0025] Figure 3 The present invention relates to a large-diameter deep shaft gradient surface structure integral sliding formwork one-time lifting construction method. Figure 1 BB view of the deep shaft shown.

[0026] Figure 4 The present invention relates to a large-diameter deep shaft gradient surface structure integral sliding formwork one-time lifting construction method. Figure 1 AA view of the slipform equipment in the position shown.

[0027] Figure 5 yes Figure 4 A magnified schematic diagram of point A in the middle.

[0028] Figure 6 The present invention relates to a large-diameter deep shaft gradient surface structure integral sliding formwork one-time lifting construction method. Figure 1 BB view of the slipform equipment in the position shown.

[0029] Figure 7 yes Figure 6 A magnified schematic diagram of point B in the middle.

[0030] Figure 8 The present invention relates to a large-diameter deep shaft gradient surface structure integral sliding formwork one-time lifting construction method. Figure 4 CC view of the slipform equipment in the position shown.

[0031] Explanation of the reference numerals in the accompanying drawings: 1. Main body of the deep shaft; 2. Middle partition wall; 3. Fore pool for water inlet; 4. Working chamber; 5. Fixed formwork; 51. Support truss; 511. F-type climbing frame; 52. Adjusting cylinder; 53. Adjusting screw rod; 6. Movable formwork; 7. Heightening truss; 8. Adjusting mechanism; 81. Adjusting support rod; 82. Guide beam; 9. Adjusting formwork; 91. Adjusting block; 92. Straight-edge adjusting mold; 93. Arc-edge adjusting mold; 10. Climbing system; 101. Climbing pole; 102. Climbing jack; 11. Operating platform; 111. Lifting rod; 112. Auxiliary plate; 12. Hand winch. DETAILED DESCRIPTION

[0032] The following is combined with Figure 1-8 This application is described in further detail.

[0033] The present application discloses a large-diameter deep shaft gradient surface structure integral sliding formwork one-time lifting construction method, referring to Figures 1 to 3 , including the following steps: S1: 8 feeding pipes are arranged around the construction pit of the deep shaft, and 8 3t stabilizers are used to hang the feeding pipes. Each feeding pipe controls a 10-meter diameter operation range. A slipform steel bar processing plant is built outside the construction pit of the deep shaft. The finished steel bars are transferred to the gantry crane control area by the on-site 25t truck crane, and then the finished steel bars are hoisted to the bottom of the construction pit and tied and fixed.

[0034] S2: After the first section of steel bars is tied, a slipform device is installed in the construction pit of the deep shaft. The slipform device includes a template structure of the water inlet forebay 3 and a template structure of multiple working chambers 4 and a climbing system 10 (such as Figure 8 As shown), the construction gap between the outer side of the formwork structure of the water inlet front pool 3 and the inner wall of the deep shaft construction pit and the construction gap between the outer side of the formwork structure of the working chamber 4 and the inner wall of the deep shaft construction pit are used for casting to form the deep shaft main body 1, and the construction gap between the formwork structure of the water inlet front pool 3 and the formwork structures of multiple working chambers 4 are used for casting to form the middle partition wall 2.

[0035] Reference Figure 4 and Figure 5 The template structure of the water intake front pool 3 includes a fixed template 5, a movable template 6 and an adjustable template 9. The fixed template 5 extends along the inner wall contour of the deep shaft construction pit, the movable template 6 extends along the length direction of the middle partition wall 2, and the adjustable template 9 is used to block the gap between the movable template 6 and the fixed template 5. The fixed template 5, the movable template 6 and the adjustable template 9 together enclose a circumferentially closed template structure of the water intake front pool 3.

[0036] A support truss 51 is installed inside the fixed formwork 5 to reinforce the fixed formwork 5 that is bent greatly. A heightening truss 7 is installed on the top of the support truss 51 and the top of the formwork structure of multiple working chambers 4. The support truss 51 cooperates with the heightening truss 7 to achieve the purpose of connecting the fixed formwork 5 with the formwork structure of multiple working chambers 4, so that the relative position of the fixed formwork 5 and the formwork structure of multiple working chambers 4 remains stable, and they serve together as the main frame of the slipform equipment, which is conducive to improving the overall structural stability of the slipform equipment.

[0037] A plurality of groups of adjusting cylinders 52 distributed up and down are hingedly installed at the supporting truss 51. The adjusting cylinders 52 can swing up and down to adjust the direction of the adjusting cylinders 52. Then, the telescopic ends of the adjusting cylinders 52 are hingedly installed on the inner side of the movable template 6. The movable template 6 is moved under the telescopic action of the adjusting cylinders 52. At the same time, the inclination angle of the movable template 6 can be changed to form an inclined side wall of the middle partition wall 2, thereby facilitating the formation of a gradient surface structure of the middle partition wall 2.

[0038] In this embodiment, there are two adjustment templates 9, which are respectively disposed at the two ends of the fixed template 5. The adjustment template 9 includes an adjustment block 91 and an arc edge adjustment mold 93 and a straight edge adjustment mold 92 respectively disposed on both sides of the adjustment block 91. In addition, an adjustment mechanism 8 is installed between the fixed template 5 and the adjustment block 91 and between the movable template 6 and the adjustment block 91, for adjusting the position and angle of the movable template 6 between the fixed template 5 and the movable template 6.

[0039] Reference Figure 6 and Figure 7Specifically, the adjustment mechanism 8 includes two guide beams 82 and two adjustment support rods 81. The two guide beams 82 are respectively installed and fixed at the two ends of the adjustment block 91. The two guide beams 82 are respectively located on the inner side of the straight edge adjustment mold 92 and the arc edge adjustment mold 93. The two adjustment support rods 81 are respectively hinged on the inner side of the two guide beams 82, and the ends of the two adjustment support rods 81 away from the guide beams 82 are cross-staggered and respectively hinged to the ends of the fixed template 5 and the movable template 6. The two guide beams 82 slide along the extension direction of the end of the movable template 6 and the extension direction of the end of the fixed template 5. The adjustment support rod 81 has a telescopic function and a self-locking function. In this embodiment, the adjustment support rod 81 includes a bidirectional screw and two threaded sleeves threadedly connected to the two ends of the bidirectional screw. The threaded sleeve is hinged to the hinge seat at the guide beam 82. The length of the adjustment support rod 81 can be adjusted by rotating the bidirectional screw. The angle and position of the adjustment block 91 are adjusted together by two sets of adjustment support rods 81 to adapt to the change of the relative position of the movable template 6 and the fixed template 5. The inner side of the straight-edge adjustment mold 92 is sealed tightly against the outer side of the movable template 6, and the arc-edge adjustment mold 93 is sealed tightly against the outer side of the fixed template 5, so that the gap between the ends of the movable template 6 and the fixed template 5 always remains closed, which is beneficial to improving the deformation stability and adjustment efficiency of the sliding mold equipment.

[0040] Reference Figure 4 and Figure 8 The hand chain hoist 12 is slidably connected to the bottom of the heightening truss 7, and the top of the movable template 6 is fixedly connected to the traction end of the hand chain hoist 12. The hand chain hoist 12 is a large-diameter connecting member between the movable template 6 and the heightening truss 7, which can transfer the load of the movable template 6 to the heightening truss 7, which is beneficial to improve the stability of the movable template 6. At the same time, the hand chain hoist 12 can move with the movable template 6, and the height of the movable template 6 can be adjusted by lifting the hand chain hoist 12, which is beneficial to improve the adjustment flexibility of the movable template 6.

[0041] In order to further improve the stability of the movable formwork 6, an adjusting screw rod 53 may be provided between the movable formwork 6 and the supporting truss 51, and the adjusting screw rod 53 has a length adjustment function and a self-locking function.

[0042] An operating platform 11 is installed at the bottom of the supporting truss 51, and the operating platform 11 is close to the side wall of the middle partition wall 2 and the inner wall of the deep shaft body 1. The operating platform 11 includes a suspension rod 111 and an auxiliary plate 112. When installing the operating platform 11 below the movable formwork 6, one pair of suspension rods 111 is fixed to the inner side of the bottom of the movable formwork 6, and the other pair of suspension rods 111 is slidably installed at the bottom of the supporting truss 51. The auxiliary plate 112 can be used for construction workers to stand, so as to facilitate the steps of concrete curing, trimming, embedded parts processing and door opening formwork removal.

[0043] In this embodiment, the climbing system 10 includes a plurality of climbing poles 101 and a plurality of climbing jacks 102 used in conjunction with the climbing poles 101. The plurality of climbing poles 101 are arranged vertically in the construction pit of the deep shaft and distributed circumferentially. The climbing jacks 102 are installed on the top of the slipform equipment through the F-type climbing frame 511. Before installing the climbing poles 101, the steel pipes should be grouted in advance to ensure that the climbing poles 101 have sufficient strength. When installing for the first time, ensure that the bottom of the climbing poles 101 is flush and in vertical contact with the bottom plate surface. When installing the slipform equipment, ensure that the template edge line coincides with the design edge line, the slipform climbing poles 101 are vertical, and the entire formwork is horizontal.

[0044] S3: Pour concrete into the construction pit of the deep shaft through the feeding pipe to form the first section of the deep shaft main body 1. The concrete should be poured symmetrically during feeding, and the height of each pouring should be controlled within 200~300mm, and the concrete surface should be kept at the same level as much as possible.

[0045] S4: After the concrete reaches a certain strength, a section of finished steel bars is lowered and tied and fixed. Then, the sliding formwork equipment climbs upward under the driving action of the climbing system 10, so that the outer side of the movable formwork 6 of the sliding formwork equipment is always in close contact with the surface of the cast concrete structure. Then, the position of the movable formwork 6 is adjusted in the direction away from the fixed formwork 5 to reduce the distance between the movable formwork 6 and the formwork structure of the working chamber 4, and then the position of the adjustment formwork 9 is adjusted accordingly to fill the gap between the movable formwork 6 and the fixed formwork 5 to maintain the sealed state of the formwork structure of the water inlet front pool 3; in the movable formwork 6 displacement step, the adjustment block 91 is moved and adjusted under the guidance of the guide beam 82, the straight edge adjustment mold 92 slides on the outer side of the movable formwork 6, and the arc edge adjustment mold 93 slides on the outer side of the fixed formwork 5, so that the gap between the ends of the movable formwork 6 and the fixed formwork 5 is always kept in a closed state.

[0046] S5: Repeat S3 and S4, and finally form a deep shaft body 1 in the construction pit, and a middle partition wall 2 structure with a gradually changing thickness between the working chamber 4 and the water inlet front pool 3, and the cross section of the middle partition wall 2 structure gradually narrows from bottom to top.

[0047] Reference Figure 6 and Figure 7 It should be noted that when the moving distance of the movable template 6 exceeds the adjustment range of the adjustment template 9, the adjustment mechanism 8 can be temporarily detached, and the end of the supporting truss 51 and the end of the fixed template 5 can be lengthened, and then the adjustment mechanism 8 can be reinstalled, and then the position and angle of the adjustment block 91 can be re-adjusted.

[0048] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A large-diameter deep shaft gradient surface structure integral sliding formwork one-time lifting construction method, characterized in that: The following steps are involved: S1: Arrange the material discharge pipe around the construction pit of the deep shaft, and hang the finished steel bars to the bottom of the construction pit and tie them up; S2: After the first section of steel bars are tied, a slipform device is installed in the construction pit of the deep shaft. The slipform device includes a formwork structure of the water inlet forebay (3), a formwork structure of multiple working chambers (4), and a climbing system (10). The construction gap between the outer side of the formwork structure of the water inlet forebay (3) and the inner wall of the deep shaft construction pit and the construction gap between the outer side of the formwork structure of the working chamber (4) and the inner wall of the deep shaft construction pit are used for casting to form the deep shaft body (1). The gap between the formwork structure of the water inlet forebay (3) and the formwork structure of multiple working chambers (4) is The construction gap is used for pouring to form the middle partition wall (2); the template structure of the water intake forebay (3) includes a fixed template (5), a movable template (6) and an adjustable template (9); the fixed template (5) extends along the inner wall contour of the deep shaft construction pit; the movable template (6) extends along the length direction of the middle partition wall (2); the adjustable template (9) is used to block the gap between the movable template (6) and the fixed template (5); the fixed template (5), the movable template (6) and the adjustable template (9) together enclose a circumferentially closed template structure of the water intake forebay (3); S3: pouring concrete into the construction pit of the deep shaft through a feed pipe to form the first section of the deep shaft body (1); S4: After the concrete reaches a certain strength, a section of finished steel bars is lowered and tied and fixed, and then the sliding formwork equipment climbs upward under the driving action of the climbing system (10), and then the position of the movable formwork (6) is adjusted in a direction away from the fixed formwork (5) to reduce the distance between the movable formwork (6) and the formwork structure of the working chamber (4), and then the position of the adjustment formwork (9) is adjusted accordingly to fill the gap between the movable formwork (6) and the fixed formwork (5) to maintain the sealed state of the formwork structure of the water inlet front pool (3); S5: Repeat S3 and S4, and finally form a deep shaft main body (1) in the construction pit, and form a middle partition wall (2) structure with a gradually changing thickness between the working chamber (4) and the water intake fore pool (3), and the cross section of the middle partition wall (2) structure gradually narrows from bottom to top.

2. The large-diameter deep shaft gradient surface structure integral sliding formwork one-time lifting construction method according to claim 1 is characterized by: In the slipform equipment installation step of S2, a supporting truss (51) is installed on the inner side of the fixed formwork (5), and a heightening truss (7) is installed on the top of the supporting truss (51) and on the top of the formwork structure of the multiple working chambers (4), and the fixed formwork (5) and the formwork structure of the multiple working chambers (4) are fixed by the heightening truss (7).

3. The one-time lifting construction method of the large-diameter deep shaft gradient surface structure with integral sliding formwork according to claim 2 is characterized in that: In the sliding formwork equipment installation step S2, a plurality of groups of adjusting cylinders (52) distributed vertically are hingedly installed at the supporting truss (51), and the telescopic ends of the adjusting cylinders (52) are hingedly installed on the inner side of the movable formwork (6). The adjusting cylinders (52) are used to adjust the position and angle of the movable formwork (6).

4. The one-time lifting construction method of the integral sliding formwork of the gradual surface structure of a large-diameter deep vertical shaft according to claim 2 is characterized by: The adjustment template (9) comprises an adjustment block (91) and an arc-edge adjustment mold (93) and a straight-edge adjustment mold (92) respectively arranged on both sides of the adjustment block (91); an adjustment mechanism (8) is installed between the fixed template (5) and the adjustment block (91) and between the movable template (6) and the adjustment block (91) for adjusting the position and angle of the movable template (6) between the fixed template (5) and the movable template (6); the inner side of the straight-edge adjustment mold (92) is sealed tightly against the outer side of the movable template (6), and the arc-edge adjustment mold (93) is sealed tightly against the outer side of the fixed template (5); in the movable template (6) displacement step S4, the adjustment block (91) is moved and adjusted under the guidance of the guide beam (82), the straight-edge adjustment mold (92) slides on the outer side of the movable template (6), and the arc-edge adjustment mold (93) slides on the outer side of the fixed template (5), so that the gap between the ends of the movable template (6) and the fixed template (5) is always kept in a closed state.

5. The one-time lifting construction method of the integral sliding formwork of the gradual surface structure of a large-diameter deep vertical shaft according to claim 2 is characterized by: In the slipform equipment installation step S2, the climbing system (10) includes a plurality of climbing rods (101) and a plurality of climbing jacks (102) used in conjunction with the climbing rods (101), the plurality of climbing rods (101) are vertically arranged in a construction pit of a deep shaft and distributed circumferentially, and the climbing jacks (102) are installed on the top of the slipform equipment.

6. The one-time lifting construction method of the large-diameter deep vertical shaft gradient surface structure with integral sliding formwork according to claim 2 is characterized by: A hand chain hoist (12) is slidably connected to the bottom of the heightening truss (7), and the top of the movable template (6) is fixedly connected to the traction end of the hand chain hoist (12).

7. The one-time lifting construction method of the integral sliding formwork of the gradual surface structure of a large-diameter deep vertical shaft according to claim 2 is characterized by: An operating platform (11) is installed at the bottom of the supporting truss (51), and the operating platform (11) is close to the side wall of the middle partition wall (2) and the inner wall of the deep shaft body (1).

8. The one-time lifting construction method of the large-diameter deep vertical shaft gradient surface structure with integral sliding formwork according to claim 7 is characterized by: The operating platform (11) comprises a suspension rod (111) and an auxiliary plate (112). When installing the operating platform (11) below the movable template (6), one pair of the suspension rods (111) is fixedly installed on the inner side of the bottom of the movable template (6), and the other pair of suspension rods (111) is slidably installed on the bottom of the supporting truss (51).

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