Climbing formwork system for hollow thin-walled pier column and construction method thereof

Abstract

The application relates to the engineering technical field, in particular to a climbing formwork system of a hollow thin-wall pier column and a construction method thereof, which comprises a self-climbing lifting device, a climbing frame vertical support column, a climbing frame horizontal connecting beam, an operating platform upper longitudinal beam, a vertical lifting guide beam, an outer formwork moving device and an inner formwork moving device, a first vertical sliding rail is arranged on the side wall of the vertical lifting guide beam, the outer formwork moving device is arranged on the first vertical sliding rail, and a second vertical sliding rail is arranged on the side wall of the climbing frame vertical support column. When the hollow thin-wall pier column is constructed, the outer formwork moving device can make the outer formwork climb upwards, the inner formwork moving device can make the outer formwork climb upwards, the self-climbing lifting device can make the whole body climb upwards, and under the joint action of the outer formwork moving device, the inner formwork moving device and the self-climbing lifting device, the outer formwork and the inner formwork can be sequentially climbed from bottom to top, the cooperation of a tower crane and a hand-operated hoist is not needed, and the climbing efficiency and safety are improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of engineering technology, and in particular to a climbing formwork system of a hollow thin-wall pier column and a construction method thereof. BACKGROUND

[0002] During the construction of the hollow thin-wall pier column, the outer formwork and the inner formwork are used to pour concrete to form a section of the concrete pier column, and then the outer formwork and the inner formwork are climbed from bottom to top to complete the construction of each section of the concrete pier column. At present, the climbing of the outer formwork and the inner formwork needs to be performed under the cooperation of the tower crane and the hand-operated hoist, and the efficiency is low, which is not conducive to large-scale use. SUMMARY

[0003] The present application aims to provide a climbing formwork system of a hollow thin-wall pier column and a construction method thereof, which has high climbing efficiency of the outer formwork and the inner formwork.

[0004] The technical solution adopted by the present application to solve the technical problem is as follows: the climbing formwork system of the hollow thin-wall pier column comprises a self-climbing lifting device, a climbing frame vertical support column, a climbing frame horizontal connecting beam, an operating platform upper longitudinal beam, a vertical lifting guide beam, an outer formwork moving device and an inner formwork moving device, the climbing frame vertical support column is vertically arranged on the self-climbing lifting device, the climbing frame horizontal connecting beam is horizontally and connectively arranged at the top of the climbing frame vertical support column, the operating platform upper longitudinal beam is horizontally and perpendicularly connected with the climbing frame horizontal connecting beam, and the vertical lifting guide beam is vertically and connectively arranged below the climbing frame horizontal connecting beam.

[0005] A first vertical sliding rail is arranged on the side wall of the vertical lifting guide beam, the outer formwork moving device is matchingly arranged on the first vertical sliding rail, and the outer formwork moving device can move up and down along the first vertical sliding rail; a second vertical sliding rail is arranged on the side wall of the climbing frame vertical support column, the inner formwork moving device is matchingly arranged on the second vertical sliding rail, and the outer formwork moving device can move up and down along the second vertical sliding rail.

[0006] The construction method of the hollow thin-wall pier column comprises the following steps:

[0007] a. completing the construction of the pier bottom concrete pier column section;

[0008] b. installing the climbing formwork system mentioned above, installing the self-climbing lifting device on the inner cavity side wall of the pier bottom concrete pier column section, and sequentially installing the climbing frame vertical support column, the climbing frame horizontal connecting beam, the operating platform upper longitudinal beam, the vertical lifting guide beam, the outer formwork moving device and the inner formwork moving device;

[0009] c. installing the first section of the outer formwork on the outer formwork moving device, installing the first section of the inner formwork on the inner formwork moving device, and correspondingly arranging the first section of the outer formwork and the first section of the inner formwork;

[0010] d. Pour the concrete pier segment corresponding to the first section of the outer formwork and the first section of the inner formwork, and tie the reinforcing steel of the previous concrete pier segment;

[0011] e. Installation and fixing of the second section of outer formwork and the second section of inner formwork: First, vertically connect the upper horizontal beam of the operating platform to the upper longitudinal beam. Horizontally connect the lower longitudinal beam of the operating platform to the lower part of the vertical lifting guide beam. Vertically connect the lower horizontal beam of the operating platform to the lower longitudinal beam. Vertically install support columns on the connecting lower longitudinal beam and lower horizontal beam of the operating platform, and install auxiliary trusses on the support columns. Then, install the second section of outer formwork at the corresponding position above the first section of outer formwork, and install the second section of inner formwork at the corresponding position above the first section of inner formwork. The second section of outer formwork and the second section of inner formwork are set up correspondingly. Install vertical back ribs on the back of the second section of inner formwork, and install horizontal back ribs on the vertical back ribs. The height of the horizontal back ribs is higher than the height of the second section of inner formwork. The auxiliary trusses are installed on the back of the second section of outer formwork, and the height of the auxiliary trusses is higher than the height of the second section of outer formwork. Finally, connect the auxiliary trusses and horizontal back ribs together using the first tie rod, and connect the lower part of the second section of outer formwork to the lower part of the second section of inner formwork using the second tie rod.

[0012] f. Pour the concrete pier segment corresponding to the second outer formwork and the second inner formwork, and cure it until it is initially set. Then tie the reinforcing steel of the previous concrete pier segment.

[0013] g. The outer mold moving device retracts to demold the first outer mold section and raises it along the first vertical slide rail to directly above the second outer mold section. The inner mold moving device retracts to demold the first inner mold section and raises it along the second vertical slide rail to directly above the second inner mold section. After the first outer mold section and the first inner mold section are raised into place, the first outer mold section and the second outer mold section are connected by the first connecting bolt, and the first inner mold section and the second inner mold section are connected by the second connecting bolt.

[0014] h. Remove the second pair of tie rods, and the self-climbing lifting device will work, climbing upwards by the distance of one section of concrete pier column.

[0015] i. Remove the first pair of tie rods, vertical back ribs and horizontal back ribs, and install vertical back ribs on the back of the first inner formwork section. Install horizontal back ribs on the vertical back ribs. The height of the horizontal back ribs is higher than the height of the first inner formwork section. Raise the height of the support column so that the height of the auxiliary truss is higher than the height of the first outer formwork section. Then connect the auxiliary truss and the horizontal back ribs together through the first pair of tie rods. Connect the lower part of the first outer formwork section to the lower part of the first inner formwork section through the second pair of tie rods.

[0016] j. The outer mold moving device separates from the first outer template and moves down along the first vertical slide rail to the second outer template, where it connects with the second outer template. The inner mold moving device separates from the first outer template and moves down along the second vertical slide rail to the second outer template, where it connects with the second inner template.

[0017] k. Pour the concrete pier segment corresponding to the second outer formwork and the second inner formwork, and cure it until it is initially set. Then tie the reinforcing steel of the previous concrete pier segment.

[0018] 1. Remove the first and second connecting bolts. The outer mold moving device retracts to demold the second outer mold section and raises it along the first vertical slide rail to directly above the first outer mold section. The inner mold moving device retracts to demold the second inner mold section and raises it along the second vertical slide rail to directly above the second inner mold section. After the second outer mold section and the second inner mold section are raised into place, connect the first and second outer mold sections with the first connecting bolt and connect the first and second inner mold sections with the second connecting bolt.

[0019] m. Pour the concrete pier segment corresponding to the first section of the outer formwork and the first section of the inner formwork, and cure it until it is initially set. Then tie the reinforcing steel of the next concrete pier segment.

[0020] n. Remove the first pair of tie rods, the second pair of tie rods, the vertical back ribs, and the horizontal back ribs. Install the vertical back ribs on the back of the second inner formwork section. Install the horizontal back ribs on the vertical back ribs. The height of the horizontal back ribs should be higher than the height of the second inner formwork section, so that the height of the auxiliary truss is higher than the height of the second outer formwork section. Then connect the auxiliary truss and the horizontal back ribs together through the first pair of tie rods. Connect the lower part of the second outer formwork section to the lower part of the second inner formwork section through the second pair of tie rods.

[0021] o. The outer mold moving device separates from the second outer template, moves down along the first vertical slide rail to the first outer template, and connects with the first outer template. The inner mold moving device separates from the second outer template, moves down along the second vertical slide rail to the first outer template, and connects with the first inner template.

[0022] p. Repeat step fo until the construction of the hollow thin-walled pier is completed.

[0023] Furthermore, the supporting columns are made of shaped steel.

[0024] Furthermore, the longitudinal beams above the operating platform, the transverse beams above the operating platform, the longitudinal beams below the operating platform, and the transverse beams below the operating platform are all made of structural steel.

[0025] Furthermore, circular hoops are installed on the longitudinal beams above the operating platform, the transverse beams above the operating platform, or the longitudinal beams below the operating platform and the transverse beams below the operating platform. The circular hoops are detachably connected to the first or second outer template section via radial members.

[0026] Furthermore, the circular hoop is composed of multiple arc segments connected together, with two connected arc segments linked by a third pair of tie rods.

[0027] Furthermore, a fourth pair of tie rods is provided, which can detachably connect the lower part of the first outer template and the lower part of the first inner template, or the lower part of the second outer template and the lower part of the second inner template.

[0028] The beneficial effects of the present invention are as follows: The climbing formwork system for hollow thin-walled piers of the present invention includes a self-climbing lifting device, a vertical support column of the climbing frame, a horizontal connecting beam of the climbing frame, a longitudinal beam above the operating platform, a vertical lifting guide beam, an outer formwork moving device, and an inner formwork moving device. A first vertical slide rail is provided on the side wall of the vertical lifting guide beam, the outer formwork moving device is provided on the first vertical slide rail, a second vertical slide rail is provided on the side wall of the vertical support column of the climbing frame, and the inner formwork moving device is provided on the second vertical slide rail. During the construction of hollow thin-walled piers, the outer formwork moving device can lift the outer formwork upwards, the inner formwork moving device can lift the outer formwork upwards, and the self-climbing lifting device can lift the entire structure upwards. With the combined action of the outer formwork moving device, the inner formwork moving device, and the self-climbing lifting device, the outer and inner formwork can be lifted sequentially from bottom to top. The need for tower cranes and hand-operated hoists is eliminated, and there is no need to pre-embed climbing support rods in the already poured concrete. The formwork climbing area does not occupy the operating space of other processes, and the climbing efficiency and safety are improved, which is conducive to large-scale use.

[0029] The construction method for hollow thin-walled piers of this invention employs the aforementioned climbing formwork system, which allows the outer and inner formwork to climb sequentially from bottom to top, eliminating the need for tower cranes and hand-operated hoists. The alternating climbing of two sections of outer and two sections of inner formwork significantly improves climbing efficiency and safety. Furthermore, the use of transverse back braces and auxiliary trusses to connect tie rods reduces the number of tie rods passing through the concrete, improving the pouring quality of the hollow thin-walled pier concrete. A circular hoop is installed on the back side of the outer formwork, detachably connected to the outer formwork via radial members, enhancing the stability of the entire construction device and significantly increasing the clamping force of the formwork. This drastically reduces the number of tie rods required, further improving construction efficiency and safety. Attached Figure Description

[0030] Figure 1 This is a front view schematic diagram of the construction of the hollow thin-walled pier column of the present invention;

[0031] Figure 2This is a top view schematic diagram of the construction of the hollow thin-walled pier column of the present invention;

[0032] The following components are marked as follows: 1. Self-climbing lifting device; 2. Vertical support column of climbing frame; 3. Horizontal connecting beam of climbing frame; 4. Longitudinal beam above the operating platform; 5. Vertical lifting guide beam; 6. External formwork moving device; 7. Internal formwork moving device; 8. First section of external formwork; 9. First section of internal formwork; 10. Second section of external formwork; 11. Horizontal beam above the operating platform; 12. Support column; 13. Auxiliary truss; 14. Horizontal back rib; 15. First tie rod; 16. Second tie rod; 17. Circular hoop plate; 18. Radial member; 19. Concrete pier column section at the bottom of the pier; 20. Concrete pier column section to be poured; 21. Detailed Implementation

[0033] The present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0034] like Figure 1 , Figure 2 As shown, the climbing formwork system for hollow thin-walled piers of the present invention includes a self-climbing lifting device 1, a vertical support column 2 for the climbing frame, a horizontal connecting beam 3 for the climbing frame, a longitudinal beam 4 above the operating platform, a vertical lifting guide beam 5, an outer formwork moving device 6, and an inner formwork moving device 7. The vertical support column 2 for the climbing frame is vertically arranged on the self-climbing lifting device 1, the horizontal connecting beam 3 for the climbing frame is horizontally connected to the top of the vertical support column 2, the longitudinal beam 4 above the operating platform is horizontally connected to the horizontal connecting beam 3 for the climbing frame, and the vertical lifting guide beam 5 is vertically connected to the bottom of the horizontal connecting beam 3 for the climbing frame.

[0035] A first vertical slide rail is provided on the side wall of the vertical lifting guide beam 5. The outer mold moving device 6 is matched and installed on the first vertical slide rail, and the outer mold moving device 6 can move up and down along the first vertical slide rail. A second vertical slide rail is provided on the side wall of the vertical support column 2 of the climbing frame. The inner mold moving device 7 is matched and installed on the second vertical slide rail, and the outer mold moving device 6 can move up and down along the second vertical slide rail.

[0036] The power component in the self-climbing lifting device 1 is preferably a hydraulic component. The self-climbing lifting device 1 is installed on the outer wall of the concrete. It can climb up the outer wall of the concrete from bottom to top through its own hydraulic component, thereby driving the vertical support column 2 of the climbing frame to climb upward, and then driving the entire climbing formwork system to climb upward.

[0037] The power component in the outer mold moving device 6 is a hydraulic assembly, which can drive the outer mold plate to move horizontally left and right, and forward and backward, and can also move up and down along the first vertical slide rail through its own hydraulic assembly. The power component in the inner mold moving device 7 is a hydraulic assembly, which can drive the inner mold plate to move horizontally left and right, and forward and backward, and can also move up and down along the first vertical slide rail through its own hydraulic assembly.

[0038] During the construction of hollow thin-walled piers, the outer formwork moving device 6 can lift the outer formwork upwards, the inner formwork moving device 7 can lift the outer formwork upwards, and the self-climbing lifting device 1 can lift the entire structure upwards. Under the combined action of the outer formwork moving device 6, the inner formwork moving device 7, and the self-climbing lifting device 1, the outer formwork and the inner formwork can be lifted sequentially from bottom to top, eliminating the need for the cooperation of tower cranes and hand-operated hoists. The climbing efficiency and safety are improved, which is conducive to large-scale use.

[0039] For example Figure 1 , Figure 2 As shown, the construction method for hollow thin-walled piers includes the following steps:

[0040] a. Complete the construction of the 20-meter concrete pier column section at the pier base;

[0041] b. Install the climbing formwork system as described in claim 1, install the self-climbing lifting device 1 on the inner cavity side wall of the concrete pier column section 20 at the bottom of the pier, and install the vertical support column 2 of the climbing frame, the horizontal connecting beam 3 of the climbing frame, the longitudinal beam 4 above the operating platform, the vertical lifting guide beam 5, the outer formwork moving device 6 and the inner formwork moving device 7 in sequence.

[0042] c. Install the first outer formwork 8 on the outer formwork moving device 6, and install the first inner formwork 9 on the inner formwork moving device 7. The first outer formwork 8 and the first inner formwork 9 are set up in a corresponding manner, and the section between the first outer formwork 8 and the first inner formwork 9 is the concrete pier column section 21 to be poured.

[0043] d. Pour the concrete pier segment corresponding to the first outer formwork 8 and the first inner formwork 9, and tie the reinforcing steel of the previous concrete pier segment.

[0044] e. Installation and fixing of the second section of outer formwork 10 and the second section of inner formwork 11: First, vertically connect the upper horizontal beam 12 of the operating platform to the upper longitudinal beam 4. Horizontally connect the lower longitudinal beam of the operating platform to the lower part of the vertical lifting guide beam 5. Vertically connect the lower horizontal beam of the operating platform to the lower longitudinal beam. Vertically install support columns 13 on the connecting lower longitudinal beam and lower horizontal beam of the operating platform. Install auxiliary trusses 14 on the support columns 13. Then, install the second section of outer formwork 10 at the corresponding position above the first section of outer formwork 8, and install the second section of inner formwork 11 at the corresponding position above the first section of inner formwork 9. The second section of outer formwork 10 and the second section of inner formwork 11 are then connected. The two inner formwork sections 11 are set up correspondingly. The second outer formwork section 10 and the second inner formwork section 11 are the concrete pier column sections 21 to be poured. Vertical back ribs are installed on the back of the second inner formwork section 11, and horizontal back ribs 15 are installed on the vertical back ribs. The height of the horizontal back ribs 15 is higher than the height of the second inner formwork section 11. The auxiliary truss 14 is installed on the back of the second outer formwork section 10, and the height of the auxiliary truss 14 is higher than the height of the second outer formwork section 10. Finally, the auxiliary truss 14 and the horizontal back ribs 15 are connected together by the first tie rod 16, and the lower part of the second outer formwork section 10 is connected to the lower part of the second inner formwork section 11 by the second tie rod 17.

[0045] f. Pour the concrete pier segment corresponding to the second outer formwork 10 and the second inner formwork 11, and cure it until it is initially set. Then tie the reinforcing steel of the previous concrete pier segment.

[0046] g. The outer mold transfer device 6 retracts to demold the first outer mold section 8 and raises it along the first vertical slide rail to directly above the second outer mold section 10. The inner mold transfer device 7 retracts to demold the first inner mold section 9 and raises it along the second vertical slide rail to directly above the second inner mold section 11. After the first outer mold section 8 and the first inner mold section 9 are raised to their positions, the first outer mold section 8 and the second outer mold section 10 are connected by the first connecting bolt, and the first inner mold section 9 and the second inner mold section 11 are connected by the second connecting bolt.

[0047] h. Remove the second pair of tie rods 17, and the self-climbing lifting device 1 will work, climbing upwards by the distance of one section of concrete pier column, thereby causing the entire construction device to climb upwards by the distance of one section of concrete pier column.

[0048] i. Remove the first tie rod 16, the vertical back rib and the horizontal back rib 15, and install the vertical back rib on the back of the first inner template 9. Install the horizontal back rib 15 on the vertical back rib. The height of the horizontal back rib 15 is higher than the height of the first inner template 9. Raise the height of the support column 13 so that the height of the auxiliary truss 14 is higher than the height of the first outer template 8. Then connect the auxiliary truss 14 and the horizontal back rib 15 together through the first tie rod 16. Connect the lower part of the first outer template 8 to the lower part of the first inner template 9 through the second tie rod 17.

[0049] j. The outer mold moving device 6 separates from the first outer template 8, moves down along the first vertical slide rail to the second outer template 10, and connects with the second outer template 10. The inner mold moving device 7 separates from the first outer template 8, moves down along the second vertical slide rail to the second outer template 10, and connects with the second inner template 11.

[0050] k. Pour the concrete pier segment corresponding to the second outer formwork 10 and the second inner formwork 11, and cure it until it is initially set. Then tie the reinforcing steel of the previous concrete pier segment.

[0051] 1. Remove the first connecting bolt and the second connecting bolt. The outer mold moving device 6 retracts to demold the second outer mold section 10 and raises it along the first vertical slide rail to directly above the first outer mold section 8. The inner mold moving device 7 retracts to demold the second inner mold section 11 and raises the first inner mold section 9 along the second vertical slide rail to directly above the second inner mold section 11. After the second outer mold section 10 and the second inner mold section 11 are raised into place, the first outer mold section 8 and the second outer mold section 10 are connected by the first connecting bolt, and the first inner mold section 9 and the second inner mold section 11 are connected by the second connecting bolt.

[0052] m. Pour the concrete pier segment corresponding to the first outer formwork 8 and the first inner formwork 9, and cure it until initial setting, then tie the reinforcing steel of the previous concrete pier segment.

[0053] n. Remove the first pair of tie rods 16, the second pair of tie rods 17, the vertical back rib and the horizontal back rib 15, and install the vertical back rib on the back of the second inner template 11. Install the horizontal back rib 15 on the vertical back rib. The height of the horizontal back rib 15 is higher than the height of the second inner template 11, so that the height of the auxiliary truss 14 is higher than the height of the second outer template 10. Then connect the auxiliary truss 14 and the horizontal back rib 15 together through the first pair of tie rods 16. Connect the lower part of the second outer template 10 to the lower part of the second inner template 11 through the second pair of tie rods 17.

[0054] o. The outer mold moving device 6 separates from the second outer template 10, moves down along the first vertical slide rail to the first outer template 8, and connects with the first outer template 8. The inner mold moving device 7 separates from the second outer template 10, moves down along the second vertical slide rail to the first outer template 8, and connects with the first inner template 9.

[0055] p. Repeat step fo until the construction of the hollow thin-walled pier is completed.

[0056] To improve construction safety and facilitate installation, the support column 13 is made of structural steel, as are the longitudinal beam 4 above the operating platform, the transverse beam 12 above the operating platform, the longitudinal beam below the operating platform, and the transverse beam below the operating platform.

[0057] To further improve the stability of the entire construction device and enhance construction safety, for example... Figure 1 , Figure 2 As shown, circular hoop plates 18 are installed on the longitudinal beam 4 above the operating platform, the transverse beam 12 above the operating platform, or the longitudinal beam and transverse beam below the operating platform. The circular hoop plates 18 are detachably connected to the first outer formwork section 8 or the second outer formwork section 10 via radial members 19. During concrete pouring, the circular hoop plates 18, connected to the first outer formwork section 8 or the second outer formwork section 10 via the radial members 19, provide stability, significantly reducing the number of tie rods required and further improving construction safety. When the first outer formwork section 8 or the second outer formwork section 10 is raised, the radial members 19 are removed.

[0058] To facilitate the processing and installation of the circular hoop 18, the circular hoop 18 is composed of multiple connected arc segments, with two connected arc segments linked by a third tie rod. For example... Figure 2 As shown, the circular hoop 18 is composed of four connected circular arcs.

[0059] To further enhance the stability of the entire device and improve construction safety, a fourth pair of tie rods is installed. These fourth tie rods detachably connect the lower parts of the first outer formwork section 8 and the first inner formwork section 9, or the lower parts of the second outer formwork section 10 and the second inner formwork section 11. When the first outer formwork section 8, the first inner formwork section 9, the second outer formwork section 10, the second inner formwork section 11, or the entire construction device is raised, the fourth pair of tie rods can be removed.

[0060] In summary, the construction method for hollow thin-walled piers of the present invention utilizes the aforementioned climbing formwork system to sequentially ascend the outer and inner formwork from bottom to top, eliminating the need for tower cranes and hand-operated hoists. The alternating ascent of two sections of outer and two sections of inner formwork significantly improves climbing efficiency and safety. Furthermore, the use of transverse back braces 15 and auxiliary trusses 14 to connect tie rods reduces the number of tie rods passing through the concrete, improving the pouring quality of the hollow thin-walled pier concrete. The installation of circular hoop plates 18 on the back side of the outer formwork, detachably connected to the outer formwork via radial members 19, enhances the stability of the entire construction device, significantly reduces the number of tie rods used, and further improves construction safety.

Claims

1. A climbing formwork system for hollow thin-walled piers, characterized in that: It includes a self-climbing lifting device (1), a climbing frame vertical support column (2), a climbing frame horizontal connecting beam (3), a longitudinal beam above the operating platform (4), a vertical lifting guide beam (5), an outer mold moving device (6), and an inner mold moving device (7). The climbing frame vertical support column (2) is vertically installed on the self-climbing lifting device (1). The climbing frame horizontal connecting beam (3) is horizontally connected to the top of the climbing frame vertical support column (2). The longitudinal beam above the operating platform (4) is horizontally connected to the climbing frame horizontal connecting beam (3) perpendicularly. The vertical lifting guide beam (5) is vertically connected to the bottom of the climbing frame horizontal connecting beam (3). A first vertical slide rail is provided on the side wall of the vertical lifting guide beam (5), and an outer mold moving device (6) is matched and set on the first vertical slide rail. The outer mold moving device (6) can move up and down along the first vertical slide rail. A second vertical slide rail is provided on the side wall of the vertical support column (2) of the climbing frame, and an inner mold moving device (7) is matched and set on the second vertical slide rail. The outer mold moving device (6) can move up and down along the second vertical slide rail.

2. A construction method for hollow thin-walled piers, characterized in that, Includes the following steps: a. Complete the construction of the concrete pier column section (20) at the bottom of the pier; b. Install the climbing formwork system as described in claim 1, install the self-climbing lifting device (1) on the inner cavity side wall of the concrete pier column section (20) at the bottom of the pier, and install the vertical support column (2), the horizontal connecting beam (3), the longitudinal beam above the operating platform (4), the vertical lifting guide beam (5), the outer formwork moving device (6) and the inner formwork moving device (7) in sequence. c. Install the first outer template (8) on the outer mold moving device (6), and install the first inner template (9) on the inner mold moving device (7), with the first outer template (8) and the first inner template (9) being set in a corresponding manner; d. Pour the concrete pier segment corresponding to the first outer formwork (8) and the first inner formwork (9) at this time, and tie the reinforcing steel of the previous concrete pier segment; e. Installation and fixing of the second section of outer formwork (10) and the second section of inner formwork (11): First, vertically connect the upper horizontal beam (12) of the upper longitudinal beam (4) of the operating platform, horizontally connect the lower longitudinal beam of the operating platform to the lower part of the vertical lifting guide beam (5), vertically connect the lower horizontal beam of the operating platform to the lower longitudinal beam of the operating platform, and vertically install the support column (13) on the connecting lower longitudinal beam and lower horizontal beam of the operating platform, and install the auxiliary truss (14) on the support column (13); then, install the second section of outer formwork (10) at the corresponding position above the first section of outer formwork (8), and install the second section of inner formwork (11) at the corresponding position above the first section of inner formwork (9). The second outer template (10) is set in correspondence with the second inner template (11). A vertical back rib is installed on the back of the second inner template (11), and a horizontal back rib (15) is installed on the vertical back rib. The height of the horizontal back rib (15) is higher than the height of the second inner template (11). An auxiliary truss (14) is installed on the back of the second outer template (10), and the height of the auxiliary truss (14) is higher than the height of the second outer template (10). Finally, the auxiliary truss (14) and the horizontal back rib (15) are connected together by the first tie rod (16), and the second tie rod (17) connects the lower part of the second outer template (10) with the lower part of the second inner template (11). f. Pour the concrete pier section corresponding to the second outer formwork (10) and the second inner formwork (11) at this time, and cure it until it is initially set, and tie the reinforcing steel of the previous concrete pier section. g. The outer mold transfer device (6) retracts to demold the first outer mold section (8) and raises it along the first vertical slide rail to the top of the second outer mold section (10). The inner mold transfer device (7) retracts to demold the first inner mold section (9) and raises it along the second vertical slide rail to the top of the second inner mold section (11). After the first outer mold section (8) and the first inner mold section (9) are raised to their positions, the first outer mold section (8) and the second outer mold section (10) are connected by the first connecting bolt, and the first inner mold section (9) and the second inner mold section (11) are connected by the second connecting bolt. h. Remove the second pair of tie rods (17), and the self-climbing lifting device (1) will work, climbing upwards by the distance of one section of concrete pier column. i. Remove the first pair of tie rods (16), vertical back ribs and horizontal back ribs (15), and install vertical back ribs on the back of the first inner template (9). Install horizontal back ribs (15) on the vertical back ribs. The height of the horizontal back ribs (15) is higher than the height of the first inner template (9). Raise the height of the support column (13) so that the height of the auxiliary truss (14) is higher than the height of the first outer template (8). Then connect the auxiliary truss (14) and the horizontal back ribs (15) together through the first pair of tie rods (16). The second pair of tie rods (17) connects the lower part of the first outer template (8) to the lower part of the first inner template (9). j. The outer mold moving device (6) is separated from the first outer template (8), and the outer mold moving device (6) moves down along the first vertical slide rail to the second outer template (10) and connects with the second outer template (10). The inner mold moving device (7) is separated from the first outer template (8), and the inner mold moving device (7) moves down along the second vertical slide rail to the second outer template (10) and connects with the second inner template (11). k. Pour the concrete pier section corresponding to the second outer formwork (10) and the second inner formwork (11) at this time, and cure it until initial setting, and tie the reinforcing steel of the previous concrete pier section.

1. Remove the first connecting bolt and the second connecting bolt. The outer mold moving device (6) retracts to demold the second outer template (10) and raises the second outer template (10) to directly above the first outer template (8) along the first vertical slide rail. The inner mold moving device (7) retracts to demold the second inner template (11) and raises the first inner template (9) to directly above the second inner template (11) along the second vertical slide rail. After the second outer template (10) and the second inner template (11) are raised to their positions, the first outer template (8) and the second outer template (10) are connected by the first connecting bolt, and the first inner template (9) and the second inner template (11) are connected by the second connecting bolt. m. Pour the concrete pier section corresponding to the first section of outer formwork (8) and the first section of inner formwork (9) at this time, and cure it until initial setting, and tie the reinforcing steel of the previous section of concrete pier section. n. Remove the first pair of tie rods (16), the second pair of tie rods (17), the vertical back rib and the horizontal back rib (15), and install the vertical back rib on the back of the second inner template (11). Install the horizontal back rib (15) on the vertical back rib. The height of the horizontal back rib (15) is higher than the height of the second inner template (11), so that the height of the auxiliary truss (14) is higher than the height of the second outer template (10). Then connect the auxiliary truss (14) and the horizontal back rib (15) together through the first pair of tie rods (16). The second pair of tie rods (17) connects the lower part of the second outer template (10) to the lower part of the second inner template (11). o. The outer mold moving device (6) is separated from the second outer template (10). The outer mold moving device (6) moves down along the first vertical slide rail to the first outer template (8) and connects with the first outer template (8). The inner mold moving device (7) is separated from the second outer template (10). The inner mold moving device (7) moves down along the second vertical slide rail to the first outer template (8) and connects with the first inner template (9). p. Repeat step fo until the construction of the hollow thin-walled pier is completed.

3. The construction method for hollow thin-walled piers as described in claim 2, characterized in that: The supporting column (13) is made of steel profile.

4. The construction method for hollow thin-walled piers as described in claim 2, characterized in that: The longitudinal beam (4) above the operating platform, the transverse beam (12) above the operating platform, the longitudinal beam below the operating platform, and the transverse beam below the operating platform are made of structural steel.

5. The construction method of hollow thin-walled piers as described in any one of claims 2 to 4, characterized in that: A circular hoop plate (18) is provided on the longitudinal beam (4) above the operating platform, the transverse beam (12) above the operating platform, or the longitudinal beam below the operating platform and the transverse beam below the operating platform. The circular hoop plate (18) is detachably connected to the first section of the outer template (8) or the second section of the outer template (10) through radial rods (19).

6. The construction method for hollow thin-walled piers as described in claim 5, characterized in that: The circular hoop (18) is composed of multiple arc segments connected together, and two connected arc segments are connected by a third tie rod.

7. The construction method for hollow thin-walled piers as described in claim 2, characterized in that: A fourth pair of tie rods is also provided, which can detachably connect the lower part of the first outer template (8) and the lower part of the first inner template (9) or the lower part of the second outer template (10) and the lower part of the second inner template (11).

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