Steel ladle concrete upper tower column system and construction method

Abstract

The present invention relates to a steel ladle concrete upper tower column system and construction method, including an angle steel connected to form an integral inner and outer steel tower frame system, a segment hoisting bottom anti-deformation bracket system, a tower-beam combination section main beam segment hoisting auxiliary positioning device, a segment connection temporary fixing device, a circumferential stiffening rib PBL key inner steel bar insertion fixing guide device, an inner and outer tower wall concrete pouring guide frame and a tower column internal hanging type operating platform. The beneficial effects of the present invention are: the deformation of the upper tower column frame during the hoisting process is prevented by having a standardized hanger and a segment hoisting bottom device; the temporary fixing of the upper tower column two segments is carried out by using a segment connection temporary fixing device with an electromagnet; the overall working efficiency of the bridge upper tower column can be improved, the safety of construction personnel can be ensured, and it has good technical and economic benefits.

Description

Technical Field

[0001] The present invention belongs to the technical field of highway bridges, and particularly relates to a steel-concrete composite upper tower column system and a construction method, which are particularly suitable for the rapid construction of the steel-concrete composite upper tower column of large bridges. Background Art

[0002] With the continuous progress of human civilization, as an important tool for people to expand living space, the design theory, structural form and construction materials of bridges are constantly being enriched and improved. As a main structural form of modern long-span bridges, cable-stayed bridges are widely used in projects such as cross-river and cross-sea. Steel bridge towers have the characteristics of light self-weight, small volume, good seismic performance, factory processing and fast construction speed, and are widely used in long-span cable-stayed bridges.

[0003] During the construction of the steel-concrete composite upper tower column, due to the extremely large volume of the steel tower body and the complex internal shape, it is difficult to carry out the welding construction of the falsework. At the same time, due to its large weight, it is easy to deform during the hoisting process, affecting the construction quality; it is difficult to assist in positioning during the hoisting process, and the construction difficulty is great; in addition, the steel bars in the circumferential PBL keys are prone to shift during the concrete pouring process, and it is necessary to ensure that they are stable at the preset position during the pouring process; the inner wall of the tower column is smooth, and the safety of construction personnel is poor.

[0004] Therefore, for the problems existing in the construction of the steel-concrete composite upper tower column, there is an urgent need for a complete set of construction methods that can not only improve the construction efficiency and quality of the steel-concrete composite upper tower column, but also ensure the safety of construction personnel. Summary of the Invention

[0005] The purpose of the present invention is to overcome the deficiencies in the prior art and provide a steel-concrete composite upper tower column system and a construction method.

[0006] This steel-concrete composite upper tower column system includes an internal and external steel tower falsework system connected by angle steel into a whole, a segment hoisting bottom anti-deformation support system, a main beam segment hoisting auxiliary positioning device for the tower-beam joint section, a segment connection temporary fixing device, a circumferential stiffening rib PBL key internal steel bar insertion and fixing guiding device, a concrete pouring guiding frame between the internal and external tower walls, and a hanging operation platform inside the tower column;

[0007] The internal and external steel tower falsework system connected by angle steel into a whole includes an inner falsework support system and an outer falsework support system;

[0008] The segment hoisting bottom anti-deformation support system includes a standardized hanging frame and a segment hoisting bottom device;

[0009] The main beam segment hoisting auxiliary positioning device for the tower-beam joint section includes a guiding buttress provided with guiding pulleys and a rear trolley for moving and fixing the guiding buttress;

[0010] The segment temporary fixing device includes a positioning rod and a trumpet-shaped steel sleeve, and the positioning rod and the trumpet-shaped steel sleeve are respectively arranged on the outer side of the tower wall of the first segment of the upper tower column and the second segment of the upper tower column;

[0011] The steel bar insertion fixing guide device in the annular stiffening rib PBL key comprises a first steel bar fixing frame and a second steel bar fixing frame, and the second steel bar fixing frame is slidably connected to the first steel bar fixing frame;

[0012] The concrete pouring guide frame between the inner and outer tower walls is arranged on the inner side of the inner wall and the outer side of the outer wall of the upper tower column; the concrete pouring guide frame between the inner and outer tower walls includes a guide frame side block and a guide frame center block, and both the guide frame side block and the guide frame center block are provided with concrete pouring guide holes;

[0013] The lower-hanging operating platform inside the tower column includes a top fixed platform and a lower-hanging operating platform; the top fixed platform is lowered to the lower-hanging operating platform by a steel wire rope.

[0014] As a preferred embodiment: the angle steel is connected into an integral inner and outer steel tower frame system which also includes a concrete foundation, a steel pipe column support, a first base plate and a second base plate, the inner frame support system and the outer frame support system are composed of a frame vertical support and a frame horizontal support welded together; the first base plate and the second base plate are provided with inner angle steel positioning holes and outer angle steel positioning holes, wherein the positioning holes of the first base plate are completely penetrated, while the positioning holes of the second base plate are not completely penetrated, and the first base plate and the second base plate are spaced ~ cm apart.

[0015] As a preferred embodiment: when installing the upper tower frame, the standardized hanger and the segment lifting bottom-covering device are respectively arranged at the upper and lower ends of the upper tower frame, and the upper tower frame is lifted by connecting the standardized hanger, the lifting lug and the segment lifting bottom-covering device with a steel wire rope; the segment lifting bottom-covering device includes an oblique support rod, a first wire-paying roller, a second wire-paying roller, a first sleeve, a second sleeve and a vertical telescopic cylinder. When the vertical telescopic cylinder extends from the first sleeve, the oblique support rod extends from the second sleeve and unfolds accordingly; the segment lifting bottom-covering device also includes a first self-locking roller, a second self-locking roller and a third self-locking roller; the second self-locking roller controls the opening angle of the oblique support rod through a steel wire rope; a support gasket is provided at the top of the oblique support rod through the third self-locking roller, and the support gasket is horizontal when the oblique support rod is unfolded.

[0016] Preferably: an anti-collision block is provided on the top of the guide buttress, a guide pulley group is installed on the guide buttress, the guide pulley group includes a sleeve, and both ends of multiple sleeve groups are respectively provided with threads and guide pulleys, a spring is provided inside the sleeve, and the guide pulley is connected to the spring; the threaded end of the guide pulley group is installed in the screw hole of the guide buttress, and the threaded end of the guide pulley group is also connected to the trolley fixing hole on the rear trolley; the rear trolley is provided with wheels and a jack at the bottom.

[0017] Preferably, the upper tower column falsework includes the first section and the second section of the upper tower column; the positioning rod is arranged on the first section of the upper tower column, and the flared steel sleeve is arranged on the second section of the upper tower column. Electromagnets are provided on both the positioning rod and the flared steel sleeve; the steel bars in the circumferential stiffening rib PBL key are inserted into the fixed guiding device and temporarily fixed to the inner side of the upper tower column through the guiding frame fixing plate and the fixing bolts. The second steel bar fixing frame is slidably connected to the first steel bar fixing frame through a chute.

[0018] Preferably, the concrete pouring guiding frame between the inner and outer tower walls is installed on the inner side of the inner wall of the upper tower column and the outer side of the outer wall of the upper tower column through the guiding frame anchor; the concrete pouring guiding frame between the inner and outer tower walls further includes the side of the guiding frame, and an h-shaped buckle is provided on the side of the guiding frame. The h-shaped buckle on the side of the concrete pouring guiding frame between the inner and outer tower walls is inserted into the guiding frame anchor.

[0019] Preferably, the hanging operation platform inside the tower column further includes diagonal anchors and diagonal buckles; a motor and a wire reel are provided on the top fixed platform, and the hanging operation platform includes a guardrail, a kickboard, a wooden plank and a handrail steel pipe; diagonal anchors are provided on both the inner side of the inner tower wall and the outer side of the outer tower wall, and both ends of the top fixed platform are fixed to the diagonal anchors located on the inner side of the inner tower wall and the outer side of the outer tower wall through diagonal buckles respectively.

[0020] The construction method of this steel-concrete composite upper tower column system includes the following steps:

[0021] Step 1: Build an integral internal and external steel tower falsework system connected by angle steel;

[0022] Step 2: After installing the main beam, distribution beam and Bailey beam of the tower beam joint section, lift the first section of the upper tower column through the segment hoisting bottom anti-deformation support system; push the tower beam joint section main beam segment hoisting auxiliary positioning device to the predetermined position of the first section of the main beam through the rear trolley, and assist the segment hoisting bottom anti-deformation support system to hoist and place the first section of the upper tower column;

[0023] Step 3: Install the steel bar insertion and fixing guiding device in the circumferential stiffening rib PBL key above the upper tower column, pull out the second steel bar fixing frame, and insert the steel bars;

[0024] Step 4: Install the concrete pouring guiding frame between the inner and outer tower walls through the guiding frame anchor on the upper tower column falsework, and pour the concrete;

[0025] Step 5: Remove the steel bar insertion and fixing guiding device in the circumferential stiffening rib PBL key, install the segment temporary fixing device, and continue to hoist the second section of the upper tower column;

[0026] Step 6: Remove the segment temporary fixing device; install the hanging operation platform inside the tower column, and the operator descends into the falsework through the hanging operation platform, and then removes the hanging operation platform inside the tower column after welding;

[0027] Step 7: Repeat Steps 5 and 6 for concrete pouring until the top of the tower is completed.

[0028] Preferably, Step 2 is specifically as follows: After the main beam, distribution beam, and Bailey beam of the tower-beam connection section are installed, the first section of the upper tower column is lifted by a standardized hanging bracket and a section hoisting bottom support device.

[0029] Install the auxiliary positioning device for hoisting the main beam section of the tower-beam connection section on the ground. Assemble the guide pulley set, guide retaining wall, and rear trolley in sequence. The rear trolley pushes the auxiliary positioning device for hoisting the main beam section of the tower-beam connection section to the predetermined position of the first section of the main beam, jacks up the jack, fixes the auxiliary positioning device for hoisting the main beam section of the tower-beam connection section, and then hoists the first section of the upper tower column vertically.

[0030] After the first section of the upper tower column enters the range of the auxiliary positioning device, the section hoisting bottom support device is retracted by the steel wire rope. Then, continue to lower the first section of the upper tower column. After the hoisting is completed, release the steel wire rope, standardized hanging bracket, and section hoisting bottom support device.

[0031] The beneficial effects of the present invention are as follows:

[0032] 1) The overall internal and external steel tower wall falsework system connected by angle steel can improve the construction efficiency of angle steel positioning welding of the falsework and realize the rapid assembly of the upper tower column falsework.

[0033] 2) The section hoisting bottom anti-deformation support system can effectively prevent the deformation of the upper tower column falsework during hoisting through the standardized hanging bracket and section hoisting bottom support device, and effectively improve the construction quality.

[0034] 3) The auxiliary positioning device for hoisting the main beam section of the tower-beam connection section can effectively reduce the positioning difficulty of hoisting the main beam section of the tower-beam connection section, can accelerate the construction progress. At the same time, the auxiliary positioning device has a wide application range and can be reused, with good economic benefits.

[0035] 4) The fixing and guiding device for inserting the internal steel bars of the circumferential stiffening rib PBL key can effectively improve the construction efficiency of steel bar insertion and can also adapt to the positioning of the upper tower column steel bars of different sizes, with strong applicability.

[0036] 5) The concrete pouring guide frame between the internal and external tower walls has good stability, and at the same time can effectively reduce the shaking of the conduit during concrete pouring, improving the concrete pouring efficiency.

[0037] 6) The suspended operation platform inside the tower column can be quickly installed, recycled, safe and reliable, and can effectively ensure the construction safety of construction personnel entering the tower.

[0038] 7) This construction method can not only improve the construction efficiency and quality of the steel ladle concrete upper tower column but also ensure the safety of the construction workers. It has good economic and social benefits and can be further promoted and applied. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] Figure 1 The plan view of the structural system of the inner and outer steel tower wall frame connected by angle steel;

[0040] Figure 2 The elevation drawing of the internal and external steel tower wall frame system structure is connected by angle steel;

[0041] Figure 3 It is a cross-sectional diagram of the structure of the anti-deformation support for segment hoisting;

[0042] Figure 4 It is a plan view of the structure of the anti-deformation support for segment hoisting;

[0043] Figure 5 is a schematic diagram of the structure of the segment lifting bottom support device (where Figure 5a The schematic diagram of the structure of the device when it is folded. Figure 5b is a schematic diagram of the structure when the device is unfolded);

[0044] Figure 6 is a schematic diagram of the auxiliary positioning system structure for the main beam segment hoisting of the tower-beam combination section (where Figure 6a The overall structural diagram of the lifting auxiliary positioning system is shown in Figure 1. Figure 6b for Figure 6a A magnified view of the structure of the middle A area, Figure 6c for Figure 6a (enlarged view of the structure of area B in the middle);

[0045] Figure 7 is a schematic diagram of the structure of a temporary fixing device for connecting segments with a hoop (where Figure 7a is a schematic diagram of the front view of the device. Figure 7b is a side structural schematic diagram of the device);

[0046] Figure 8 Sectional view of the fixing guide device for inserting reinforcement into the PBL key of the annular stiffener;

[0047] Figure 9 Plan view of the fixing guide device for inserting reinforcement into the PBL key of the annular stiffener;

[0048] Figure 10 is a vertical view of the concrete pouring guide frame between the inner and outer tower walls (where Figure 10a This is the elevation view of the overall structure of the concrete pouring guide frame. Figure 10b for Figure 10a (enlarged view of the structure of the middle C area);

[0049] Figure 11 Plan view of the guide frame for pouring concrete between the inner and outer tower walls;

[0050] Figure 12 is a cross-sectional view of the lower-hanging operating platform inside the tower column (where Figure 12a This is a cross-sectional view of the overall structure of the under-hung operating platform. Figure 10b for Figure 12a (enlarged view of the structure of the middle D area);

[0051] Figure 13 This is a cross-sectional view of the downward-hanging operating platform inside the tower column. DETAILED DESCRIPTION

[0052] The present invention is further described below in conjunction with embodiments. The description of the following embodiments is only used to help understand the present invention. It should be noted that for ordinary persons in the art, without departing from the principle of the present invention, the present invention can also be modified in some ways, and these improvements and modifications also fall within the scope of protection of the claims of the present invention.

[0053] Embodiment 1

[0054] As an embodiment, a steel ladle concrete upper tower column system is as follows Figures 1 to 13 As shown, it includes an integral inner and outer steel tower frame system connected by angle steel, a segment hoisting bottom anti-deformation bracket system, a tower-beam joint segment main beam segment hoisting auxiliary positioning device, a segment connection temporary fixing device, a circumferential stiffening rib PBL key inner steel bar insertion fixing guide device, an inner and outer tower wall concrete pouring guide frame and a tower column internal hanging type operating platform;

[0055] Angle steels are connected to form an integral inner and outer steel tower frame system, including a concrete foundation 1, a steel pipe column support 2, a first base plate 4, a second base plate 5, an inner frame support system 9, and an outer frame support system 8; the inner frame support system 9 and the outer frame support system 8 are welded together by a frame vertical support 10 and a frame transverse support 11; the first base plate 4 and the second base plate 5 are provided with inner angle steel positioning holes 6 and outer angle steel positioning holes 7, wherein the positioning holes of the first base plate 4 are completely penetrated, while the positioning holes of the second base plate 5 are not completely penetrated, so as to limit the displacement of the supporting angle steel and provide vertical support.

[0056] The segment hoisting bottom anti-deformation support system includes a standardized hanger 14 and a segment hoisting bottom device 16 installed on the upper tower column formwork 13 when the upper tower column formwork 13 is installed; the upper tower column formwork 13 is lifted by connecting the standardized hanger 14, lifting lugs 15 and the segment hoisting bottom device 16 with steel wire ropes 12; the segment hoisting bottom device 16 is realized by a first wire-releasing roller 17, a second wire-releasing roller 18, a first sleeve 19, a second sleeve 20 and a vertical telescopic cylinder 21 to expand and retract the segment hoisting bottom device 16; the segment hoisting bottom device 16 includes a first self-locking roller 24, a second self-locking roller 25, and a third self-locking roller 26; the second self-locking roller 25 controls the opening angle of the diagonal support rod 23 through a steel wire rope 12; it is locked by the third self-locking roller 26 to make the support gasket 22 in a horizontal state to achieve the effect of preventing deformation at the bottom of the upper tower column.

[0057] The auxiliary positioning device for hoisting the main beam segment of the tower-beam connection section includes a guiding retaining wall 33 with multiple groups of guiding pulleys 36 and a rear trolley 34 for fixing. A guiding pulley group is installed on the guiding retaining wall 33. The guiding pulley group includes a sleeve 39. Both ends of multiple groups of sleeves 39 are respectively provided with threads and guiding pulleys 36. A spring 38 is arranged inside the sleeve 39, and the guiding pulley 36 is connected to the spring 38; the threaded end of the guiding pulley group is installed in the screw hole 37 of the guiding retaining wall 33, and the threaded end of the guiding pulley group is also connected to the trolley fixing hole position 40 on the rear trolley 34; for the rear trolley 34, wheels 41 and multiple groups of jacks 42 are arranged at the bottom. After the rear trolley 34 reaches the predetermined position, it is lifted by the jacks 42.

[0058] The segment temporary fixing device is respectively arranged on the outer sides of the tower walls of the first segment 27 of the upper tower column and the second segment 43 of the upper tower column. The first segment 27 of the upper tower column is provided with a positioning rod 45 with an electromagnet 46, and the second segment 43 of the upper tower column is provided with a flared steel sleeve 44 with an electromagnet 46; it can realize the temporary guiding and fixing during the hoisting process of the upper tower column segments and is convenient for disassembly.

[0059] The fixing guiding device for inserting the steel bars in the circumferential stiffening rib PBL key is temporarily fixed on the inner side of the upper tower column through a guiding frame fixing plate 51 and fixing bolts 52. A first steel bar fixing frame 48 and a second steel bar fixing frame 49 are respectively arranged. The second steel bar fixing frame 49 can slide left and right through a chute 54 to realize the positioning of more groups of steel bars.

[0060] The concrete pouring guiding frame between the inner and outer tower walls is installed by welding guiding frame anchor parts 58 on the inner side of the inner wall of the upper tower column and the outer side of the outer wall of the upper tower column in advance. When installing, insert the h-shaped buckle of the side block 55 of the guiding frame into the guiding frame anchor part 58; the concrete pouring guiding frame between the inner and outer tower walls includes a side block 55 of the guiding frame and a center block 56 of the guiding frame, and concrete pouring guiding holes 57 are arranged in the centers.

[0061] The hanging operation platform inside the tower column includes diagonal anchor fittings 65, diagonal buckles 64, a top fixed platform 60, and a hanging operation platform 71; the top fixed platform is provided with a motor 63 and a wire reel 61, and the hanging operation platform 71 is lowered by a steel wire rope 12; the hanging operation platform 71 is composed of a guardrail 66, a kickboard 67, a wooden plank 68, and a handrail steel pipe 69. When installing the top fixed platform 60, insert the diagonal buckle 64 into the diagonal anchor fittings 65 located on the outer sides of the inner tower wall and the outer tower wall for fixation.

[0062] Embodiment 2

[0063] As another embodiment, the construction method of the steel - encased concrete upper tower column system proposed in Embodiment 1 includes the following steps:

[0064] Step 1: According to the dimensions of the upper tower column in the design scheme, determine the positions of the concrete foundation 1, the inner angle steel positioning holes 6, the outer angle steel positioning holes 7, the inner falsework support system 9, and the outer falsework support system 8. Sequentially construct the concrete foundation 1, the steel pipe column support 2, and the channel steel diagonal brace 3. Drill holes in the first bottom plate 4 and punch through the holes in the second bottom plate 5. Install the first bottom plate 4 and the second bottom plate 5, with a 5 - 10 cm interval between the two bottom plates.

[0065] On the ground, divide the inner falsework support system 9 and the outer falsework support system 8 into 4 groups for assembly. Each group has 5 falsework horizontal supports 11 and 2 falsework vertical supports 10; after splicing, weld them to the second bottom plate 5, and then weld the remaining falsework horizontal supports 11 on the two different support frames to form a complete falsework support system.

[0066] Insert angle steels into the inner and outer angle steel positioning holes respectively, and then weld the inner and outer falsework steel plates. At the positions where the inner and outer steel plates need to be welded with connecting steel plates, cut the falsework horizontal support 11 and weld the inner and outer tower wall connecting steel plates.

[0067] Step 2: After the falsework is welded, connect the standardized hanging bracket 14, the lifting lug 15, and the segment hoisting bottom - holding device 16 through the steel wire rope 12.

[0068] Open the first wire - releasing roller 17 to release the wire, and lower the vertical telescopic cylinder 21 to unlock the first self - locking roller 24, the second self - locking roller 25, and the third self - locking roller 26 in sequence; adjust the position of the diagonal support rod 23 so that the support gasket 22 is directly below the inner tower wall and the connecting steel plate, level the support gasket 22, and lock the third self - locking roller 26; tighten the steel wire rope 12 and lock the second self - locking roller 25 and the first self - locking roller 24 respectively.

[0069] After the main girder 28, distribution beam 29, and Bailey beam 30 of the tower - beam joint section are installed, install the standardized hanging bracket 14 and the segment hoisting bottom - holding device 16, and hoist the first section of the upper tower column 27.

[0070] Install the hoisting auxiliary positioning device for the main girder segment at the ground-mounted tower beam joint. Assemble 36 sets of guiding pulleys, 33 guiding retaining walls, and 34 rear trolleys in sequence. Push the auxiliary positioning device to the predetermined position of the first segment of the main girder 28, jack up the jack 42, fix the auxiliary positioning device, and then slowly hoist and place the first segment of the upper tower column 27 vertically.

[0071] After the first segment of the upper tower column 27 enters the range of the auxiliary positioning device, retract the segment hoisting sling device 16 through the steel wire rope. Then continue to lower and place the first segment of the upper tower column 27. After the hoisting is completed, release the steel wire rope 12, the standardized hanging bracket 14, and the segment hoisting sling device 16.

[0072] Step 3: Weld the first segment of the upper tower column 27 and the main girder 28 to form an integral body. Install the circumferential stiffening rib PBL key inner steel bar insertion and fixing guiding device above the outer wall of the upper tower column, turn the fixing bolt 52, pull out the second steel bar fixing frame 49, and insert the steel bar 53.

[0073] Step 4: Install two side blocks 55 of the concrete pouring guiding frame. Insert the h-shaped buckle 59 into the guiding frame anchor 58 on the upper tower column formwork 13. Then install the center block 56 of the guiding frame. The center block 56 of the guiding frame is connected to the side blocks 55 of the guiding frame by bolts. Then start pouring concrete.

[0074] Step 5: After the concrete pouring is completed, release the fixing bolt 52, and slowly lift out the circumferential stiffening rib PBL key inner steel bar insertion and fixing guiding device. After the concrete reaches a certain strength, install the positioning rod 45 of the first segment of the upper tower column and the flared sleeve 44 of the second segment 43 of the upper tower column, and continue to hoist the second segment 43 of the upper tower column.

[0075] Step 6: After the hoisting is completed, remove the positioning rod 45 and the flared sleeve 44; install the hanging operation platform inside the tower column. Insert the diagonal buckle 64 of the top fixed platform 60 into the diagonal anchors 65 located outside the inner tower wall and outside the outer tower wall for fixation. Connect the steel wire rope 12 to the hanging operation platform 71 inside the tower column. The operator enters the formwork through the hanging operation platform 71 inside the tower column to carry out welding and other related work.

[0076] Step 7: After the second segment 43 of the upper tower column and the steel bar 53 are welded to form an integral body, remove the hanging operation platform inside the tower column, and repeat Step 5 and Step 6 for concrete pouring.

[0077] Repeat the above steps in this way until the top of the tower is completed.

[0078] Embodiment 3

[0079] As another embodiment, the construction method of the steel-concrete composite upper tower column system proposed in Embodiment 1 includes the following steps:

[0080] Step 1: According to the dimensions of the upper tower column in the design plan, determine the positions of the concrete foundation 1, the inner angle steel positioning holes 6, the outer angle steel positioning holes 7, the inner bracket support system 9, and the outer bracket support system 8. Then, construct the concrete foundation 1, the steel pipe column support 2, and the channel steel diagonal brace 3 in sequence. Drill holes in the first bottom plate 4 and punch through holes in the second bottom plate 5, and install the first bottom plate 4 and the second bottom plate 5.

[0081] Insert the angle steels into the inner angle steel positioning holes 6 and the outer angle steel positioning holes 7 respectively. Subsequently, continue welding the transverse bracket supports 11 and the vertical bracket supports 10. At the positions where the inner and outer steel plates need to be welded with the connecting steel plates, cut the transverse bracket supports 11 and weld the connecting steel plates between the inner and outer tower walls to form a complete bracket support system.

[0082] Step 2: After the bracket welding is completed, connect the standardized hanging bracket 14 and the lifting lugs 15 through the steel wire ropes 12. After the main girder 28, distribution beam 29, and Bailey beam 30 of the tower-beam joint section are installed, install the standardized hanging bracket 14 and hoist the first section 27 of the upper tower column.

[0083] Install the hoisting auxiliary positioning device for the main girder section of the tower-beam joint section on the ground. Assemble 36 groups of guiding pulleys 36, guiding retaining walls 33, and rear trolleys 34 in sequence. Push the auxiliary positioning device to the predetermined position of the first section of the main girder 28, jack up the jack 42, fix the auxiliary positioning device, and then slowly hoist the first section 27 of the upper tower column in the vertical direction. After the hoisting is completed, release the oil of the jack 42 and remove the hoisting auxiliary positioning device for the main girder section of the tower-beam joint section.

[0084] Step 3: Weld the first section 27 of the upper tower column and the main girder 28 to form an integral body. Install the circumferential stiffening rib PBL key inner steel bar insertion and fixing guiding device above the outer wall of the upper tower column, turn the fixing bolt 52, pull out the second steel bar fixing frame 49, and insert the steel bar 53.

[0085] Step 4: Install two side blocks 55 of the concrete pouring guiding frame. Insert the h-shaped buckle 59 into the guiding frame anchor 58 on the upper tower column bracket 13. Then install the center block 56 of the guiding frame. The center block 56 of the guiding frame and the side blocks 55 of the guiding frame are connected by bolts. Subsequently, start concrete pouring. After the concrete pouring is completed, remove the concrete pouring guiding frame between the inner and outer tower walls.

[0086] Step 5: Loosen the fixing bolt 52 of the circumferential stiffening rib PBL key inner steel bar insertion and fixing guiding device and slowly lift out the device. After the concrete reaches a certain strength, install the positioning rod 45 of the first section of the upper tower column and the flared sleeve 44 of the second section 43 of the upper tower column, and continue hoisting the second section 43 of the upper tower column.

[0087] Step 6: Install the standardized hanger 14. Install the segment hoisting sling device 16, open the first wire-releasing roller 17 to release the wire, lower the vertical telescopic cylinder 21, and unlock the first self-locking roller 24, the second self-locking roller 25, and the third self-locking roller 26 in sequence; adjust the position of the diagonal support rod 23 to make the support gasket 22 directly below the inner tower wall and the connecting steel plate, level the support gasket 22, and lock the third self-locking roller 26; tighten the steel wire rope 12, and lock the second self-locking roller 25 and the first self-locking roller 24 respectively.

[0088] Step 7: After the hoisting is completed, remove the positioning rod 45 and the bell-shaped sleeve 44, and retract the standardized hanger 14 and the segment hoisting sling device 16. Install the hanging operation platform inside the tower column. Insert the diagonal fastener 64 of the top fixed platform 60 into the diagonal anchor 65 located outside the inner tower wall and the outside of the outer tower wall for fixation. Connect the steel wire rope 12 to the hanging operation platform 71. The operator enters the falsework through the hanging operation platform 71 to perform related work such as welding.

[0089] Wait until the second segment 43 of the upper tower column and the steel bars 53 are welded into a whole, remove the hanging operation platform inside the tower column, and repeat Step 4 for concrete pouring.

[0090] Repeat the above steps in this cycle until the top of the tower is completed.

Claims

1. A ladle concrete upper tower column system, characterized in that: It includes an integral inner and outer steel tower frame system connected by angle steel, a segment hoisting bottom anti-deformation bracket system, a tower-beam joint segment main beam segment hoisting auxiliary positioning device, a segment connection temporary fixing device, a circumferential stiffening rib PBL key steel bar insertion fixing guide device, an inner and outer tower wall concrete pouring guide frame and a tower column internal hanging operation platform; The angle steels are connected to form an integral inner and outer steel tower frame system, which includes an inner frame support system (9) and an outer frame support system (8); The segment hoisting bottom protection anti-deformation support system comprises a shaped hanger (14) and a segment hoisting bottom protection device (16); the shaped hanger (14) and the segment hoisting bottom protection device (16) are respectively arranged at the upper and lower ends of an upper tower column frame (13); the upper tower column frame (13) is hoisted by connecting the shaped hanger (14), the lifting lug (15) and the segment hoisting bottom protection device (16) with a steel wire rope (12); the segment hoisting bottom protection device (16) comprises an oblique support rod (23), a first wire-releasing roller (17), a second wire-releasing roller (18), a first sleeve (19), a second sleeve (20) and a vertical The telescopic cylinder (21) is configured such that when the vertical telescopic cylinder (21) extends from the first sleeve (19), the oblique support rod (23) correspondingly extends from the second sleeve (20) and unfolds; the segmented hoisting bottom-covering device (16) further comprises a first self-locking roller (24), a second self-locking roller (25) and a third self-locking roller (26); the second self-locking roller (25) controls the opening angle of the oblique support rod (23) through a steel wire rope (12); a support pad (22) is provided at the top end of the oblique support rod (23) through the third self-locking roller (26); when the oblique support rod (23) is unfolded, the support pad (22) is horizontal; The tower-beam combination section main beam segment hoisting auxiliary positioning device comprises a guide buttress (33) provided with a guide pulley (36) and a rear trolley (34) for moving and fixing the guide buttress (33); The segment temporary fixing device comprises a positioning rod (45) and a trumpet-shaped steel sleeve (44), wherein the positioning rod (45) and the trumpet-shaped steel sleeve (44) are respectively arranged on the outer side of the tower wall of the first segment (27) of the upper tower column and the second segment (43) of the upper tower column; The steel bar insertion fixing guide device in the annular stiffening rib PBL key comprises a first steel bar fixing frame (48) and a second steel bar fixing frame (49), wherein the second steel bar fixing frame (49) is slidably connected to the first steel bar fixing frame (48); The concrete pouring guide frame between the inner and outer tower walls is arranged on the inner side of the inner wall and the outer side of the outer wall of the upper tower column; the concrete pouring guide frame between the inner and outer tower walls comprises a guide frame side block (55) and a guide frame center block (56), and both the guide frame side block (55) and the guide frame center block (56) are provided with concrete pouring guide holes (57); The lower-hanging operation platform inside the tower column comprises a top fixed platform (60) and a lower-hanging operation platform (71); the top fixed platform (60) is used to suspend the lower-hanging operation platform (71) via a steel wire rope (12).

2. The ladle concrete upper tower column system according to claim 1, characterized in that: The integrated internal and external steel tower formwork system connected by angle steel also includes a concrete foundation (1), a steel pipe column support (2), a first bottom plate (4) and a second bottom plate (5). The inner formwork support system (9) and the outer formwork support system (8) are welded and composed of formwork vertical supports (10) and formwork horizontal supports (11). Inner angle steel positioning holes (6) and outer angle steel positioning holes (7) are arranged on the first bottom plate (4) and the second bottom plate (5). Among them, the positioning holes of the first bottom plate (4) penetrate completely, and the positioning holes of the second bottom plate (5) do not penetrate completely. The first bottom plate (4) and the second bottom plate (5) are spaced 5 - 10 cm apart.

3. The ladle concrete upper tower column system according to claim 1, characterized in that: An anti-collision block (35) is arranged at the top of the guiding retaining wall (33). A guiding pulley set is installed on the guiding retaining wall (33). The guiding pulley set includes a sleeve (39). Both ends of multiple groups of sleeves (39) are respectively provided with threads and guiding pulleys (36). A spring (38) is arranged inside the sleeve (39). The guiding pulley (36) is connected with the spring (38). The threaded end of the guiding pulley set is installed in the threaded hole (37) of the guiding retaining wall (33), and the threaded end of the guiding pulley set is also connected with the trolley fixing hole position (40) on the rear trolley (34). For the rear trolley (34), wheels (41) and jacks (42) are arranged at the bottom.

4. The ladle concrete upper tower column system according to claim 1, wherein: The upper tower column formwork (13) includes the first section of the upper tower column (27) and the second section of the upper tower column (43). A positioning rod (45) is arranged on the first section of the upper tower column (27), and a flared steel sleeve (44) is arranged on the second section of the upper tower column (43). Electromagnets (46) are arranged on both the positioning rod (45) and the flared steel sleeve (44). The steel bars inside the circumferential stiffening rib PBL key are inserted and fixed through the guiding device, and are temporarily fixed to the inner side of the upper tower column through the guiding frame fixing plate (51) and the fixing bolt (52). The second steel bar fixing frame (49) is slidably connected with the first steel bar fixing frame (48) through the chute (54).

5. The ladle concrete upper tower column system according to claim 1, characterized in that: The formwork for concrete pouring between the inner and outer tower walls is installed on the inner side of the inner wall of the upper tower column and the outer side of the outer wall of the upper tower column through the formwork anchor (58). The formwork for concrete pouring between the inner and outer tower walls also includes a formwork side block (55). The formwork side block (55) is provided with an h-shaped buckle. The h-shaped buckle of the formwork side block (55) of the formwork for concrete pouring between the inner and outer tower walls is inserted into the formwork anchor (58).

6. The steel ladle concrete upper tower column system according to claim 1, characterized in that: The hanging operation platform inside the tower column also includes an inclined anchor (65) and an inclined buckle (64). The top fixed platform (60) is provided with a motor (63) and a wire reel (61). The hanging operation platform (71) includes a guardrail (66), a kickboard (67), a wooden plank (68) and a handrail steel pipe (69). Inclined anchors (65) are arranged on both the inner side of the inner tower wall and the outer side of the outer tower wall. Both ends of the top fixed platform (60) are respectively fixed to the inclined anchors (65) located on the inner side of the inner tower wall and the outer side of the outer tower wall through the inclined buckles (64).

7. The construction method of the ladle concrete upper tower column system according to any one of claims 1 to 6, characterized in that, It includes the following steps: Step 1: Build the integrated internal and external steel tower formwork system connected by angle steel; Step 2: After installing the main beam (28), distribution beam (29) and Bailey beam (30) of the tower-beam connection section, lift the first section (27) of the upper tower column by the segment hoisting bottom anti-deformation support system; push the segment hoisting auxiliary positioning device for the main beam section of the tower-beam connection section to the predetermined position of the first section of the main beam (28) by the rear trolley (34), and assist the segment hoisting bottom anti-deformation support system to hoist and place the first section (27) of the upper tower column. Step 3: Install the circumferential stiffening rib PBL key internal steel bar insertion and fixing guiding device above the upper tower column, pull out the second steel bar fixing frame (49), and insert the steel bar (53). Step 4: Install the concrete pouring guiding frame between the inner and outer tower walls through the guide frame anchor (58) on the upper tower column formwork (13), and pour the concrete. Step 5: Remove the circumferential stiffening rib PBL key internal steel bar insertion and fixing guiding device, install the segment temporary fixing device, and continue to hoist the second section (43) of the upper tower column. Step 6: Remove the segment temporary fixing device; install the hanging operation platform inside the tower column. The operator enters the formwork through the hanging operation platform (71) inside the tower column, and after welding, remove the hanging operation platform inside the tower column. Step 7: Repeat Step 5 and Step 6 for concrete pouring until the top of the tower is completed.

8. The construction method of the ladle concrete upper tower column system according to claim 7, characterized in that, Specifically, Step 2 is as follows: After the installation of the main beam (28), distribution beam (29) and Bailey beam (30) of the tower-beam connection section is completed, lift the first section (27) of the upper tower column by the standardized hanging frame (14) and the segment hoisting bottom device (16). Install the segment hoisting auxiliary positioning device for the main beam section of the tower-beam connection section on the ground. Assemble the guide pulley (36) group, guide retaining wall (33) and rear trolley (34) one after another. The rear trolley (34) pushes the segment hoisting auxiliary positioning device for the main beam section of the tower-beam connection section to the predetermined position of the first section of the main beam (28), jack up the jack (42), fix the segment hoisting auxiliary positioning device for the main beam section of the tower-beam connection section, and then hoist and place the first section (27) of the upper tower column vertically. After the first section (27) of the upper tower column enters the range of the auxiliary positioning device, retract the segment hoisting bottom device (16) through the steel wire rope (12), and then continue to lower the first section (27) of the upper tower column. After the hoisting is completed, release the steel wire rope (12), standardized hanging frame (14) and segment hoisting bottom device (16).

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