Creeping formwork system of hollow thin-wall pier column and construction method of climbing formwork system

Abstract

The invention relates to the technical field of engineering, in particular to a formwork climbing system of a hollow thin-wall pier column and a construction method of the formwork climbing system. The formwork climbing system comprises a self-climbing lifting device, a climbing frame vertical supporting column, a climbing frame horizontal connecting beam, an operation 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 mold 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 supporting column. When the hollow thin-wall pier column is constructed, the outer formwork can climb upwards through the outer formwork moving device, the outer formwork can climb upwards through the inner formwork moving device, the whole body can climb upwards through the self-climbing lifting device, and under the combined 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 sequentially climb from bottom to top; the cooperation of a tower crane and a chain block is not needed any more, and the climbing efficiency and the safety are improved.

Description

Technical Field

[0001] The invention relates to the field of engineering technology, and in particular to a climbing formwork system of a hollow thin-walled pier column and a construction method thereof. Background Art

[0002] During the construction of hollow thin-walled piers, it is necessary to use outer and inner formwork to pour concrete to form a section of concrete piers, and then the outer and inner formwork are climbed from bottom to top to complete the construction of each section of concrete piers in sequence. At present, the climbing of the outer and inner formwork requires the cooperation of tower cranes and hand winches, which is inefficient and not conducive to large-scale use. Summary of the invention

[0003] The object of the present invention is to provide a climbing formwork system for a hollow thin-walled pier column with high climbing efficiency of an outer formwork and an inner formwork and a construction method thereof.

[0004] The technical solution adopted by the present invention to solve the technical problem is: a climbing formwork system for a hollow thin-walled pier column, comprising a self-climbing and lifting device, a climbing frame vertical support column, a climbing frame horizontal connecting beam, a longitudinal beam above an operating platform, a vertical lifting guide beam, an outer mold shifting device and an inner mold shifting device, the climbing frame vertical support column is vertically arranged on the self-climbing and lifting device, the climbing frame horizontal connecting beam is horizontally connected and arranged on the top of the climbing frame vertical support column, the longitudinal beam above the operating platform is horizontally connected to the climbing frame horizontal connecting beam, and the vertical lifting guide beam is vertically connected and arranged below the climbing frame horizontal connecting beam;

[0005] A first vertical slide rail is arranged on the side wall of the vertical lifting guide beam, and an outer mold shifting device is matched and arranged on the first vertical slide rail, and the outer mold shifting device can move up and down along the first vertical slide rail. A second vertical slide rail is arranged on the side wall of the vertical support column of the climbing frame, and an inner mold shifting device is matched and arranged on the second vertical slide rail, and the outer mold shifting device can move up and down along the second vertical slide rail.

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

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

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

[0009] c. Install the first section of the outer template on the outer mold shifting device, install the first section of the inner template on the inner mold shifting device, and the first section of the outer template is arranged corresponding to the first section of the inner template;

[0010] d. Cast a section of concrete pier column corresponding to the first section of outer formwork and the first section of inner formwork, and tie up the steel bars of the previous section of concrete pier column;

[0011] e. Installation and fixation of the second section outer formwork and the second section inner formwork. First, vertically connect the crossbeam above the operating platform on the longitudinal beam above the operating platform, horizontally connect the longitudinal beam below the operating platform at the lower part of the vertical lifting guide beam, vertically connect the crossbeam below the operating platform on the longitudinal beam below the operating platform, and vertically install support columns on the longitudinal beam below the operating platform and the crossbeam below the operating platform, and install auxiliary trusses on the support columns; then install the second section outer formwork at the corresponding position above the first section outer formwork, install the second section inner formwork at the corresponding position above the first section inner formwork, the second section outer formwork is set correspondingly to the second section inner formwork, install vertical back ribs on the back of the second section inner formwork, 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 inner formwork, and the auxiliary truss is installed on the back of the second section outer formwork, and the height of the auxiliary truss is higher than the height of the second section outer formwork; finally, connect the auxiliary truss and the horizontal back ribs together through the first pair of tension screws, and connect the lower part of the second section outer formwork with the lower part of the second section inner formwork by the second pair of tension screws;

[0012] f. Pour a section of concrete pier column corresponding to the second section of outer formwork and the second section of inner formwork, and cure it until initial setting, and tie the steel bars of the previous section of concrete pier column;

[0013] g. The outer mold shifting device contracts to complete demoulding of the first section outer mold, and climbs the first section outer mold to the top of the second section outer mold along the first vertical slide rail. The inner mold shifting device contracts to complete demoulding of the first section inner mold, and climbs the first section inner mold to the top of the second section inner mold along the second vertical slide rail. After the first section outer mold and the first section inner mold are climbed into place, the first section outer mold and the second section outer mold are connected by the first connecting bolt, and the first section inner mold and the second section inner mold are connected by the second connecting bolt.

[0014] h. Remove the second tension screw rod, and the self-climbing lifting device will start to climb up the distance of one section of the concrete pier column;

[0015] i. Remove the first pair of tension screws, vertical back ribs and transverse back ribs, and install vertical back ribs on the back of the first section inner formwork, install transverse back ribs on the vertical back ribs, the height of the transverse back ribs is higher than the height of the first section inner formwork, raise the height of the supporting column, make the height of the auxiliary truss higher than the height of the first section outer formwork, and then connect the auxiliary truss and transverse back ribs together through the first pair of tension screws, and connect the lower part of the first section outer formwork with the lower part of the first section inner formwork through the second pair of tension screws;

[0016] j. The outer mold moving device is separated from the first section of the outer mold plate, and the outer mold moving device moves down along the first vertical slide rail to the second section of the outer mold plate, and is connected to the second section of the outer mold plate; the inner mold moving device is separated from the first section of the outer mold plate, and the inner mold moving device moves down along the second vertical slide rail to the second section of the outer mold plate, and is connected to the second section of the inner mold plate;

[0017] k. Pour a section of concrete pier column corresponding to the second section of outer formwork and the second section of inner formwork, and cure it until initial setting, and tie the steel bars of the previous section of concrete pier column;

[0018] 1. Remove the first connecting bolt and the second connecting bolt, shrink the outer mold shifting device to complete demoulding of the second section outer mold, and climb the second section outer mold to the top of the first section outer mold along the first vertical slide rail, shrink the inner mold shifting device to complete demoulding of the second section inner mold, and climb the first section inner mold to the top of the second section inner mold along the second vertical slide rail; after the second section outer mold and the second section inner mold are climbed into place, connect the first section outer mold and the second section outer mold by the first connecting bolt, and connect the first section inner mold and the second section inner mold by the second connecting bolt;

[0019] m. Cast a section of concrete pier column corresponding to the first section of outer formwork and the first section of inner formwork, and cure it until initial setting, and tie the steel bars of the previous section of concrete pier column;

[0020] n. Remove the first pair of tension screws, the second pair of tension screws, the vertical back ribs and the horizontal back ribs, and install the vertical back ribs on the back of the second section inner formwork, and install the horizontal back ribs on the vertical back ribs. The height of the horizontal back ribs is higher than the height of the second section inner formwork, so that the height of the auxiliary truss is higher than the height of the second section outer formwork, and then connect the auxiliary truss and the horizontal back ribs together through the first pair of tension screws, and connect the lower part of the second section outer formwork with the lower part of the second section inner formwork through the second pair of tension screws;

[0021] o. The outer mold moving device is separated from the second outer mold plate, and the outer mold moving device moves down along the first vertical slide rail to the first outer mold plate, and is connected to the first outer mold plate; the inner mold moving device is separated from the second outer mold plate, and the inner mold moving device moves down along the second vertical slide rail to the first outer mold plate, and is connected to the first inner mold plate;

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

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

[0025] Furthermore, circular hoops are provided on the longitudinal beams above the operating platform, the transverse beams above the operating platform, or the longitudinal beams below the operating platform, the transverse beams below the operating platform, and the circular hoops are detachably connected to the first section outer formwork or the second section outer formwork through radial rods.

[0026] Furthermore, the circular hoop plate is formed by connecting a plurality of circular arcs, and two connected circular arcs are connected by a third tension screw.

[0027] Furthermore, a fourth tension screw is provided, which detachably connects the lower part of the first section outer formwork and the lower part of the first section inner formwork or the lower part of the second section outer formwork and the lower part of the second section inner formwork.

[0028] The beneficial effects of the present invention are as follows: the climbing formwork system of the hollow thin-walled pier column of the present invention comprises a self-climbing and lifting device, a climbing frame vertical support column, a climbing frame horizontal connecting beam, a longitudinal beam above the operating platform, a vertical lifting guide beam, an outer mold shifting device and an inner mold shifting device, a first vertical slide rail is arranged on the side wall of the vertical lifting guide beam, the outer mold shifting device is arranged on the first vertical slide rail, a second vertical slide rail is arranged on the side wall of the climbing frame vertical support column, and the inner mold shifting device is arranged on the second vertical slide rail. During the construction of hollow thin-walled piers, the outer formwork moving device can make the outer formwork climb upward, the inner formwork moving device can make the outer formwork climb upward, and the self-climbing lifting device can make the whole climb upward. 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 climbed from bottom to top in sequence. The cooperation of tower cranes and hand winches is no longer required, and there is no need to pre-embed climbing support rods on the poured concrete. The formwork climbing area does not occupy the operating space of other processes. The climbing efficiency and safety are improved, which is conducive to large-scale use.

[0029] The construction method of the hollow thin-walled pier column of the present invention adopts the above-mentioned climbing formwork system to complete the climbing of the outer formwork and the inner formwork from bottom to top in sequence, and the cooperation of the tower crane and the hand winch is no longer needed. Two sections of outer formwork and two sections of inner formwork are adopted for alternating climbing, and the climbing efficiency and safety are significantly improved; and transverse back ribs and auxiliary trusses are adopted to connect the tensioning screws, which reduces the number of tensioning screws passing through the concrete and improves the pouring quality of the hollow thin-walled pier column concrete; a circular hoop plate is installed on the back side of the outer formwork, and the circular hoop plate is detachably connected to the outer formwork through a radial rod, which improves the stability of the entire construction device, significantly improves the clamping force of the formwork, can greatly reduce the number of tensioning screws used, and further improves the construction efficiency and safety. BRIEF DESCRIPTION OF THE DRAWINGS

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

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

[0032] Marked as: self-climbing lifting device 1, climbing frame vertical support column 2, climbing frame horizontal connecting beam 3, longitudinal beam above the operating platform 4, vertical lifting guide beam 5, outer mold shifting device 6, inner mold shifting device 7, first section outer mold 8, first section inner mold 9, second section outer mold 10, second section inner mold 11, cross beam above the operating platform 12, supporting column 13, auxiliary truss 14, transverse back rib 15, first pair of tension screws 16, second pair of tension screws 17, circular hoop plate 18, radial rod 19, pier bottom concrete pier column section 20, concrete pier column section to be poured 21. DETAILED DESCRIPTION

[0033] The present invention is further described below in conjunction with the accompanying drawings and specific embodiments.

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

[0035] A first vertical slide rail is arranged on the side wall of the vertical lifting guide beam 5, and the outer mold shifting device 6 is matched and arranged on the first vertical slide rail, and the outer mold shifting device 6 can move up and down along the first vertical slide rail. A second vertical slide rail is arranged on the side wall of the vertical support column 2 of the climbing frame, and the inner mold shifting device 7 is matched and arranged on the second vertical slide rail, and the outer mold shifting 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 arranged on the outer wall of the concrete. It can climb from the bottom to the top along the outer wall of the concrete 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 member in the outer mold shifting device 6 is a hydraulic assembly, which can drive the outer mold plate to move horizontally left and right, front and back, and can also move up and down along the first vertical slide rail through its own hydraulic assembly. The power member in the inner mold shifting device 7 is a hydraulic assembly, which can drive the inner mold plate to move horizontally left and right, front and back, 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 mold shifting device 6 can make the outer mold climb upward, the inner mold shifting device 7 can make the outer mold climb upward, and the self-climbing lifting device 1 can make the whole climb upward. Under the joint action of the outer mold shifting device 6, the inner mold shifting device 7 and the self-climbing lifting device 1, the outer mold and the inner mold can be climbed from bottom to top in sequence, and the cooperation of tower cranes and hand winches is no longer required. 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 of the hollow thin-walled pier column includes the following steps:

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

[0041] b. Install the climbing formwork system 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 transfer device 6 and the inner formwork transfer device 7 in sequence;

[0042] c. Install the first section outer formwork 8 on the outer formwork transfer device 6, install the first section inner formwork 9 on the inner formwork transfer device 7, and the first section outer formwork 8 and the first section inner formwork 9 are arranged correspondingly, and the space between the first section outer formwork 8 and the first section inner formwork 9 is the concrete pier column section 21 to be poured;

[0043] d. Cast a section of concrete pier column corresponding to the first section of outer formwork 8 and the first section of inner formwork 9, and tie up the steel bars of the previous section of concrete pier column;

[0044] e. The second section outer formwork 10 and the second section inner formwork 11 are installed and fixed. First, the cross beam 12 above the operating platform is vertically connected to the longitudinal beam 4 above the operating platform, and the longitudinal beam below the operating platform is horizontally connected to the lower part of the vertical lifting guide beam 5. The cross beam below the operating platform is vertically connected to the longitudinal beam below the operating platform, and the supporting columns 13 are vertically installed on the longitudinal beam below the operating platform and the cross beam below the operating platform. The auxiliary truss 14 is installed on the supporting columns 13; then the second section outer formwork 10 is installed at the corresponding position above the first section outer formwork 8, and the second section inner formwork 11 is installed at the corresponding position above the first section inner formwork 9. The second section outer formwork 10 and the first section inner formwork 9 are installed. The second section inner formwork 11 is arranged correspondingly, the second section outer formwork 10 and the second section inner formwork 11 are the pier column section 21 to be poured with concrete, a vertical back rib is installed on the back of the second section inner formwork 11, a transverse back rib 15 is installed on the vertical back rib, the height of the transverse back rib 15 is higher than the height of the second section inner formwork 11, an auxiliary truss 14 is installed on the back of the second section outer formwork 10, and the height of the auxiliary truss 14 is higher than the height of the second section outer formwork 10; finally, the auxiliary truss 14 and the transverse back rib 15 are connected together by the first tension screw 16, and the lower part of the second section outer formwork 10 is connected to the lower part of the second section inner formwork 11 by the second tension screw 17;

[0045] f. Cast a section of concrete pier column corresponding to the second section outer formwork 10 and the second section inner formwork 11, and cure it until initial setting, and tie the steel bars of the previous section of concrete pier column;

[0046] g. The outer mold shifting device 6 contracts to complete demoulding of the first section outer mold plate 8, and climbs the first section outer mold plate 8 to the top of the second section outer mold plate 10 along the first vertical slide rail. The inner mold shifting device 7 contracts to complete demoulding of the first section inner mold plate 9, and climbs the first section inner mold plate 9 to the top of the second section inner mold plate 11 along the second vertical slide rail. After the first section outer mold plate 8 and the first section inner mold plate 9 are climbed into place, the first section outer mold plate 8 and the second section outer mold plate 10 are connected by the first connecting bolts, and the first section inner mold plate 9 and the second section inner mold plate 11 are connected by the second connecting bolts.

[0047] h. Remove the second tension screw 17, and the self-climbing lifting device 1 works, and it climbs up the distance of one section of the concrete pier column section, so that the entire construction device climbs up the distance of one section of the concrete pier column section;

[0048] i. Remove the first tension screw 16, the vertical back ribs and the transverse back ribs 15, and install the vertical back ribs on the back of the first section inner formwork 9, install the transverse back ribs 15 on the vertical back ribs, the height of the transverse back ribs 15 is higher than the height of the first section inner formwork 9, raise the height of the supporting column 13, make the height of the auxiliary truss 14 higher than the height of the first section outer formwork 8, and then connect the auxiliary truss 14 and the transverse back ribs 15 together through the first tension screw 16, and connect the lower part of the first section outer formwork 8 with the lower part of the first section inner formwork 9 through the second tension screw 17;

[0049] j. The outer mold shifting device 6 is separated from the first section outer mold plate 8, and the outer mold shifting device 6 moves down along the first vertical slide rail to the second section outer mold plate 10, and is connected to the second section outer mold plate 10. The inner mold shifting device 7 is separated from the first section outer mold plate 8, and the inner mold shifting device 7 moves down along the second vertical slide rail to the second section outer mold plate 10, and is connected to the second section inner mold plate 11;

[0050] k. Cast a section of concrete pier column corresponding to the second section outer formwork 10 and the second section inner formwork 11, and cure it until initial setting, and tie the steel bars of the previous section of concrete pier column;

[0051] 1. Remove the first connecting bolt and the second connecting bolt, shrink the outer mold shifting device 6 to complete the demoulding of the second section outer mold 10, and climb the second section outer mold 10 to the top of the first section outer mold 8 along the first vertical slide rail, shrink the inner mold shifting device 7 to complete the demoulding of the second section inner mold 11, and climb the first section inner mold 9 to the top of the second section inner mold 11 along the second vertical slide rail; after the second section outer mold 10 and the second section inner mold 11 climb into place, connect the first section outer mold 8 and the second section outer mold 10 through the first connecting bolt, and connect the first section inner mold 9 and the second section inner mold 11 through the second connecting bolt;

[0052] m. Cast a section of concrete pier column corresponding to the first section of outer formwork 8 and the first section of inner formwork 9, and cure it until initial setting, and tie the steel bars of the previous section of concrete pier column;

[0053] n. Remove the first tension screw 16, the second tension screw 17, the vertical back ribs and the transverse back ribs 15, and install the vertical back ribs on the back of the second section inner formwork 11, install the transverse back ribs 15 on the vertical back ribs, the height of the transverse back ribs 15 is higher than the height of the second section inner formwork 11, so that the height of the auxiliary truss 14 is higher than the height of the second section outer formwork 10, and then connect the auxiliary truss 14 and the transverse back ribs 15 together through the first tension screw 16, and connect the lower part of the second section outer formwork 10 with the lower part of the second section inner formwork 11 through the second tension screw 17;

[0054] o, the outer mold shifting device 6 is separated from the second section outer mold plate 10, and the outer mold shifting device 6 moves down along the first vertical slide rail to the first section outer mold plate 8, and is connected to the first section outer mold plate 8, the inner mold shifting device 7 is separated from the second section outer mold plate 10, and the inner mold shifting device 7 moves down along the second vertical slide rail to the first section outer mold plate 8, and is connected to the first section inner mold plate 9;

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

[0056] In order to improve the safety of construction and facilitate installation, the support column 13 is made of steel, and the longitudinal beam 4 above the operating platform, the cross beam 12 above the operating platform, the longitudinal beam below the operating platform and the cross beam below the operating platform are also made of steel.

[0057] In order to further improve the stability of the entire construction device and improve the safety of construction, Figure 1 , Figure 2 As shown, 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, the transverse beam below the operating platform, and the circular hoop plate 18 is detachably connected to the first section outer formwork 8 or the second section outer formwork 10 through a radial rod 19. When pouring concrete, the circular hoop plate 18 is connected to the first section outer formwork 8 or the second section outer formwork 10 through the radial rod 19, providing a stabilizing effect, which can greatly reduce the number of tension screws used, and further improve the safety of construction. When the first section outer formwork 8 or the second section outer formwork 10 climbs upward, the radial rod 19 is removed.

[0058] In order to facilitate the processing and installation of the circular hoop plate 18, the circular hoop plate 18 is formed by connecting multiple arc segments, and two connected arc segments are connected by a third tension screw. Figure 2 As shown, the circular hoop plate 18 is formed by connecting four arc segments.

[0059] In order to further improve the stability of the entire device and the safety of construction, a fourth tension screw is provided, which detachably connects the lower part of the first section outer formwork 8, the lower part of the first section inner formwork 9, or the lower part of the second section outer formwork 10, and the lower part of the second section inner formwork 11. The first section outer formwork 8, the first section inner formwork 9, the second section outer formwork 10, the second section inner formwork 11, or the entire construction device climbs upward, and the fourth tension screw is removed.

[0060] In summary, the construction method of the hollow thin-walled pier column of the present invention adopts the above-mentioned climbing formwork system to complete the climbing of the outer formwork and the inner formwork from bottom to top in sequence, and no longer needs the cooperation of the tower crane and the hand winch. Two sections of outer formwork and two sections of inner formwork are used for alternating climbing, and the climbing efficiency and safety are significantly improved; and the transverse back ribs 15 and the auxiliary trusses 14 are used to connect the tension screws, which reduces the number of tension screws passing through the concrete and improves the pouring quality of the hollow thin-walled pier column concrete; a circular hoop plate 18 is installed on the back side of the outer formwork, and the circular hoop plate 18 is detachably connected to the outer formwork through the radial rod 19, which improves the stability of the entire construction device, can greatly reduce the number of tension screws used, and further improves the safety of construction.

Claims

1. The climbing formwork system of hollow thin-walled piers is characterized by: The invention comprises a self-climbing and lifting device (1), a climbing frame vertical support column (2), a climbing frame horizontal connecting beam (3), a longitudinal beam (4) above an operating platform, a vertical lifting guide beam (5), an outer mold shifting device (6) and an inner mold shifting device (7), wherein the climbing frame vertical support column (2) is vertically arranged on the self-climbing and lifting device (1), the climbing frame horizontal connecting beam (3) is horizontally connected and arranged on the top of the climbing frame vertical support column (2), the longitudinal beam (4) above the operating platform is horizontally connected to the climbing frame horizontal connecting beam (3), and the vertical lifting guide beam (5) is vertically connected and arranged below the climbing frame horizontal connecting beam (3); A first vertical slide rail is arranged on the side wall of the vertical lifting guide beam (5), an outer mold shifting device (6) is matched and arranged on the first vertical slide rail, and the outer mold shifting device (6) can move up and down along the first vertical slide rail; a second vertical slide rail is arranged on the side wall of the vertical support column (2) of the climbing frame, an inner mold shifting device (7) is matched and arranged on the second vertical slide rail, and the outer mold shifting device (6) can move up and down along the second vertical slide rail.

2. A construction method for a hollow thin-walled pier column, characterized in that: The steps include: a. Complete the construction of the pier bottom concrete column section (20); b. Install the climbing formwork system 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 transfer device (6) and the inner formwork transfer device (7) in sequence; c. Installing the first section of the outer mold plate (8) on the outer mold shifting device (6), installing the first section of the inner mold plate (9) on the inner mold shifting device (7), and the first section of the outer mold plate (8) and the first section of the inner mold plate (9) are arranged correspondingly; d. pouring a section of concrete pier column corresponding to the first section of outer formwork (8) and the first section of inner formwork (9), and tying the steel bars of the previous section of concrete pier column; e. The second section outer formwork (10) and the second section inner formwork (11) are installed and fixed. First, the upper crossbeam (12) of the operating platform is vertically connected to the upper longitudinal beam (4) of the operating platform, the lower part of the vertical lifting guide beam (5) is horizontally connected to the lower longitudinal beam of the operating platform, the lower crossbeam of the operating platform is vertically connected to the lower longitudinal beam of the operating platform, and the supporting column (13) is vertically installed on the connecting longitudinal beam and the lower crossbeam of the operating platform, and the auxiliary truss (14) is installed on the supporting column (13); then, the second section outer formwork (10) is installed at the corresponding position above the first section outer formwork (8), and the second section inner formwork (11) is installed at the corresponding position above the first section inner formwork (9). , the second section outer formwork (10) is arranged correspondingly to the second section inner formwork (11), a vertical back rib is installed on the back of the second section inner formwork (11), a transverse back rib (15) is installed on the vertical back rib, the height of the transverse back rib (15) is higher than the height of the second section inner formwork (11), an auxiliary truss (14) is installed on the back of the second section outer formwork (10), and the height of the auxiliary truss (14) is higher than the height of the second section outer formwork (10); finally, the auxiliary truss (14) and the transverse back rib (15) are connected together by a first tension screw (16), and the lower part of the second section outer formwork (10) is connected together with the lower part of the second section inner formwork (11) by a second tension screw (17); f. Cast a section of concrete pier column corresponding to the second section of outer formwork (10) and the second section of inner formwork (11), and cure until initial setting, and tie the steel bars of the previous section of concrete pier column; g. The outer mold shifting device (6) contracts to complete demoulding of the first section outer mold plate (8), and moves the first section outer mold plate (8) up to the top of the second section outer mold plate (10) along the first vertical slide rail; the inner mold shifting device (7) contracts to complete demoulding of the first section inner mold plate (9), and moves the first section inner mold plate (9) up to the top of the second section inner mold plate (11) along the second vertical slide rail; after the first section outer mold plate (8) and the first section inner mold plate (9) are moved into place, the first section outer mold plate (8) and the second section outer mold plate (10) are connected by the first connecting bolts, and the first section inner mold plate (9) and the second section inner mold plate (11) are connected by the second connecting bolts; h. Remove the second tension screw rod (17), and the self-climbing lifting device (1) starts to work, climbing upward by the distance of one section of the concrete pier column; i. Remove the first tension screw rod (16), the vertical back ribs and the transverse back ribs (15), and install the vertical back ribs on the back of the first section inner formwork (9), install the transverse back ribs (15) on the vertical back ribs, the height of the transverse back ribs (15) is higher than the height of the first section inner formwork (9), raise the height of the supporting column (13), make the height of the auxiliary truss (14) higher than the height of the first section outer formwork (8), and then connect the auxiliary truss (14) and the transverse back ribs (15) together through the first tension screw rod (16), and connect the lower part of the first section outer formwork (8) with the lower part of the first section inner formwork (9) together through the second tension screw rod (17); j. The outer mold shifting device (6) is separated from the first outer mold plate (8), and the outer mold shifting device (6) moves down along the first vertical slide rail to the second outer mold plate (10) and is connected to the second outer mold plate (10). The inner mold shifting device (7) is separated from the first outer mold plate (8), and the inner mold shifting device (7) moves down along the second vertical slide rail to the second outer mold plate (10) and is connected to the second inner mold plate (11); k. Cast a section of concrete pier column corresponding to the second section of outer formwork (10) and the second section of inner formwork (11), and cure it until initial setting, and tie the steel bars of the previous section of concrete pier column; 1. Remove the first connecting bolt and the second connecting bolt, shrink the outer mold shifting device (6) to complete demoulding of the second section outer mold (10), and climb the second section outer mold (10) along the first vertical slide rail to just above the first section outer mold (8), shrink the inner mold shifting device (7) to complete demoulding of the second section inner mold (11), and climb the first section inner mold (9) along the second vertical slide rail to just above the second section inner mold (11); after the second section outer mold (10) and the second section inner mold (11) are climbed into place, connect the first section outer mold (8) and the second section outer mold (10) by the first connecting bolt, and connect the first section inner mold (9) and the second section inner mold (11) by the second connecting bolt; m. Cast a section of concrete pier column corresponding to the first section of outer formwork (8) and the first section of inner formwork (9), and cure it until it begins to set, and tie up the steel bars of the previous section of concrete pier column; n. Remove the first tension screw rod (16), the second tension screw rod (17), the vertical back ribs and the transverse back ribs (15), and install the vertical back ribs on the back of the second section inner formwork (11), and install the transverse back ribs (15) on the vertical back ribs, the height of the transverse back ribs (15) being higher than the height of the second section inner formwork (11), so that the height of the auxiliary truss (14) is higher than the height of the second section outer formwork (10), and then connect the auxiliary truss (14) and the transverse back ribs (15) together through the first tension screw rod (16), and connect the lower part of the second section outer formwork (10) with the lower part of the second section inner formwork (11) through the second tension screw rod (17); o, the outer mold shifting device (6) is separated from the second outer mold plate (10), the outer mold shifting device (6) moves down along the first vertical slide rail to the first outer mold plate (8), and is connected to the first outer mold plate (8), the inner mold shifting device (7) is separated from the second outer mold plate (10), the inner mold shifting device (7) moves down along the second vertical slide rail to the first outer mold plate (8), and is connected to the first inner mold plate (9); p. Repeat steps fo until the construction of the hollow thin-walled pier is completed.

3. The construction method of the hollow thin-walled pier column as claimed in claim 2, characterized in that: The supporting column (13) is made of profiled steel.

4. The construction method of the hollow thin-walled pier column as claimed 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 section steel.

5. The construction method of the hollow thin-walled pier according to 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, the transverse beam below the operating platform. The circular hoop plate (18) is detachably connected to the first section outer formwork (8) or the second section outer formwork (10) via a radial rod (19).

6. The construction method of the hollow thin-walled pier column according to claim 5, characterized in that: The circular hoop plate (18) is formed by connecting a plurality of circular arcs, and two connected circular arcs are connected by a third tension screw rod.

7. The construction method of the hollow thin-walled pier column according to claim 2, characterized in that: A fourth tensioning screw is also provided, which detachably connects the lower part of the first section outer formwork (8) and the lower part of the first section inner formwork (9) or the lower part of the second section outer formwork (10) and the lower part of the second section inner formwork (11).

Images