CN115535877B - Device for fixing tower crane attached arm for fabricated building construction and construction method - Google Patents
Device for fixing tower crane attached arm for fabricated building construction and construction method Download PDFInfo
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- CN115535877B CN115535877B CN202211143200.3A CN202211143200A CN115535877B CN 115535877 B CN115535877 B CN 115535877B CN 202211143200 A CN202211143200 A CN 202211143200A CN 115535877 B CN115535877 B CN 115535877B
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- concrete
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
- B66C23/00—Cranes comprising essentially a beam, boom, or triangular structure acting as a cantilever and mounted for translatory of swinging movements in vertical or horizontal planes or a combination of such movements, e.g. jib-cranes, derricks, tower cranes
- B66C23/18—Cranes comprising essentially a beam, boom, or triangular structure acting as a cantilever and mounted for translatory of swinging movements in vertical or horizontal planes or a combination of such movements, e.g. jib-cranes, derricks, tower cranes specially adapted for use in particular purposes
- B66C23/20—Cranes comprising essentially a beam, boom, or triangular structure acting as a cantilever and mounted for translatory of swinging movements in vertical or horizontal planes or a combination of such movements, e.g. jib-cranes, derricks, tower cranes specially adapted for use in particular purposes with supporting couples provided by walls of buildings or like structures
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
- B66C23/00—Cranes comprising essentially a beam, boom, or triangular structure acting as a cantilever and mounted for translatory of swinging movements in vertical or horizontal planes or a combination of such movements, e.g. jib-cranes, derricks, tower cranes
- B66C23/62—Constructional features or details
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/70—Wind energy
- Y02E10/72—Wind turbines with rotation axis in wind direction
Abstract
The invention provides a device and a construction method for fixing a tower crane attachment arm in assembled building construction, wherein the device comprises an upper composite floor slab and a lower composite floor slab, a plurality of precast concrete wall boards are arranged between the two composite floor slabs, a concrete edge member is cast in situ between the adjacent precast concrete wall boards, a triangular steel truss for reinforcing the concrete edge member is arranged between the lower part of the inner side of the concrete edge member and the lower composite floor slab, the triangular steel truss comprises a pair of frames and a pair of inner supports, a plurality of connecting plates are welded between the triangular steel trusses, fixing assemblies are arranged on the joint edges of the triangular steel trusses, the concrete edge member and the lower composite floor slab, and an attachment steel plate for the tower crane attachment arm is arranged on the side wall of the concrete edge member. The device can greatly improve the rigidity and strength of the attachment component of the assembled building tower crane, can bear enough adhesive force of the tower crane to ensure that the tower crane is safe to operate, and has simple structure and easy assembly and construction.
Description
Technical Field
The invention relates to the technical field of building tower crane installation, in particular to a device and a construction method for fixing a tower crane attachment arm in assembled building construction.
Background
The tower crane is divided into two types, namely a horizontal type and a compression bar type according to the form of a movable arm, has large operation space and is mainly used for vertical and horizontal conveying of materials and installation of building components in building construction. It is mainly composed of three parts of metal structure, working mechanism and electric system. In the construction site, in the process of installing the tower crane, the tower body is required to be attached and fixed due to the fact that the tower body is higher.
The existing fixing mode is to cast in-situ concrete edge component wallboards between prefabricated concrete wallboards of an assembled building, and horizontally support a tower body through tower crane attaching rods on the concrete edge component wallboards, but the cross section of the concrete edge component wallboards is generally smaller and smaller than or equal to 600mm, and steel bars in the structure are arranged less, so that the structural rigidity of the concrete edge component wallboards is weaker, and the concrete edge component wallboards cannot bear enough tower crane attaching force, so that the quality of the assembled building components and the operation safety of the tower crane are affected.
Disclosure of Invention
In order to solve the problems, the invention provides the device for fixing the tower crane attaching arm in the assembled building construction and the construction method, the device can greatly improve the rigidity and strength of the attached component of the assembled building tower crane, can bear enough adhesive force of the tower crane to ensure that the tower crane is safe to operate, and has a simple structure and is easy to assemble and construct.
In order to solve the problems, the invention adopts the following technical scheme:
the utility model provides a device for fixed tower crane of assembled building construction attaches arm, includes upper and lower two coincide floor, two install polylith precast concrete wallboard between the coincide floor, adjacent cast-in-place between the precast concrete wallboard has concrete edge component, the inboard lower part and the below of concrete edge component install the triangle steel truss that is used for strengthening concrete edge component between the coincide floor, the triangle steel truss includes a pair of frame and a pair of internal stay, the welding has polylith connecting plate between the triangle steel truss, and fixed subassembly is all installed to the laminating limit of triangle steel truss and concrete edge component and below coincide floor, install the attached steel sheet of tower crane attaches arm on the lateral wall of concrete edge component.
Preferably, a plurality of fixing bolts are arranged on the attached steel plate, a plurality of reserved bolt holes are arranged on the concrete edge member, and nuts are connected with the plurality of fixing bolts in a threaded mode after the plurality of fixing bolts penetrate through the corresponding reserved bolt holes.
Preferably, two parallel-arranged lug plates are welded on the outer side of the attaching steel plate, and tower crane attaching rods are arranged on the two parallel-arranged lug plates.
Preferably, the frame comprises three channel steel in a head-to-tail connection mode, the inner support comprises two channel steel in a connecting and welding mode, the two channel steel in a corresponding position on the frame are arranged back to back, the distance is 50mm, and the inner support is welded in the frame.
Preferably, the frame is a right triangle, and two right-angle sides of the frame are respectively attached to the concrete edge member and the laminated floor slab.
Preferably, the fixing component comprises a plurality of high-strength bolts, reserved through holes are formed in the connecting plates on the two right-angle edges of the frame, the reserved through holes are used for the corresponding high-strength bolts to pass through, reserved holes corresponding to the reserved through holes are reserved in the concrete edge member and the composite floor slab, and the reserved holes are used for the high-strength bolts to pass through.
Preferably, the three channel steels of the frame are all 2C14a channel steels, and the inner support is a 2C10 channel steel.
Preferably, the model of the reserved hole is A22, and the model of the high-strength bolt is M20.
The invention also provides a construction method of the device for fixing the tower crane attachment arm in the fabricated building construction, which comprises the following specific steps:
s1, hoisting a lower laminated slab, binding steel bars on the laminated slab, reserving reserved holes in the binding process, and pouring concrete to form a lower laminated floor slab;
s2, after the concrete on the composite floor slab is solidified to reach a certain strength, hoisting a plurality of precast concrete wall boards, after correction and positioning, sleeve grouting is carried out on the precast concrete wall boards, the precast concrete wall boards are fixed, two outer blade plates of adjacent precast concrete wall boards are spliced to form an outer template, edge component wall board reinforcing steel bars are bound at the intervals of the adjacent precast concrete wall boards, an inner template is installed after reserved holes are reserved, after reinforcement and stabilization, an upper laminated slab is hoisted, after the upper laminated floor slab reinforcing steel bars are bound, concrete is poured on the upper laminated slab and the intervals among the precast concrete wall boards, so that concrete edge components are formed, and the inner template is removed;
s3, after the concrete edge member is cast in place, a triangular steel truss is arranged between the lower part of the inner side of the concrete edge member and the lower composite floor slab, so that two right-angle sides of the frame are respectively attached to the concrete edge member and the composite floor slab, and reserved through holes on the connecting plate are aligned with reserved holes, pass through a plurality of high-strength bolts and are screwed by nuts to finish installation;
s4, placing the attaching steel plate on the outer surface of the concrete edge member, screwing down by adopting nuts after penetrating through the outer blade plate and the reserved holes on the concrete edge member through a plurality of fixing bolts, then installing one end of the tower crane attaching rod on the attaching steel plate through the lug plate, simultaneously installing the attaching frame on the tower body, and finally connecting the tail end of the tower crane attaching rod with the attaching frame.
Preferably, the structural concrete strength of the composite floor slab must reach more than 75% of the design strength when the concrete edge members are installed.
The beneficial effects of the invention are as follows:
1. the device reinforces the concrete edge member through the triangular steel truss of one truss or two trusses, can greatly improve the rigidity and strength of the precast concrete wallboard, and can bear enough adhesive force of the tower crane to ensure that the tower crane runs safely.
2. Each triangular steel truss is composed of a pair of frames and a pair of inner supports, the frames are formed by welding three channel steel heads and tails, the inner supports are formed by welding two channel steel heads in a connecting mode, the two channel steel heads at corresponding positions on the pair of frames are arranged back to back, assembly and welding are convenient, welding is conducted between each triangular steel truss through a connecting plate, and any number of combinations can be conducted according to specific conditions.
3. Through installing fixed subassembly, after two right-angle sides laminating precast concrete wallboard and coincide floor respectively, the reservation through hole on the connecting plate aligns the bolt hole, adopts many high strength bolts can accomplish the installation, and the whole supporting process can be accomplished to rethread fixed steel sheet, fixing bolt, attached steel sheet, otic placode and tower crane attached rod, and the construction is convenient.
Drawings
FIG. 1 is a schematic diagram of the structure of the present invention;
FIG. 2 is a rear view of two triangular steel trusses according to the present invention;
FIG. 3 is a perspective view of a pair of frames according to the present invention;
FIG. 4 is a schematic view of reinforcement of a concrete edge member wall in a straight line according to the present invention;
FIG. 5 is a schematic view of reinforcement of a T-shaped concrete edge member wall according to the present invention;
fig. 6 is a schematic view of reinforcement of an L-shaped concrete edge member wall according to the present invention.
In the figure: the concrete composite slab comprises a composite floor slab 1, a concrete edge member 2, a frame 3, an inner support 4, a high-strength bolt 5, a fixing bolt 6, an attaching steel plate 7, an ear plate 8, a tower crane attaching rod 9, a connecting plate 10, a reserved through hole 11, a prefabricated concrete wallboard 12, a concrete edge member wall 13T, a concrete edge member wall 14L and an outer leaf plate 15.
Description of the embodiments
In order that the above objects, features and advantages of the invention will be readily understood, a more particular description of the invention will be rendered by reference to the appended drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. The invention may be embodied in many other forms than described herein and similarly modified by those skilled in the art without departing from the spirit or scope of the invention, which is therefore not limited to the specific embodiments disclosed below.
It will be understood that when an element is referred to as being "fixed to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "left," "right," and the like are used herein for illustrative purposes only and are not meant to be the only embodiment.
Referring to fig. 1 to 4, a device for fixing a tower crane attachment arm for fabricated building construction comprises an upper composite floor slab 1 and a lower composite floor slab 1, wherein a plurality of precast concrete wall boards 16 are installed between the two composite floor slabs 1, a concrete edge member 2 is cast-in-place between the adjacent precast concrete wall boards 16, a triangular steel truss for reinforcing the concrete edge member 2 is installed between the lower part of the inner side of the concrete edge member 2 and the lower Fang Diege floor slab 1, the triangular steel truss comprises a pair of side frames 3 and a pair of inner supports 4, a plurality of connecting plates 10 are welded between the triangular steel trusses, the attachment edges of the triangular steel trusses, the concrete edge member 2 and the lower composite floor slab 1 are all provided with fixing components, and an attachment steel plate 7 for the tower crane attachment arm is installed on the side wall of the concrete edge member 2.
Further, a plurality of fixing bolts 6 are arranged on the attached steel plate 7, a plurality of reserved bolt holes are formed in the concrete edge member 2, nuts are connected with the plurality of fixing bolts 6 through threads after passing through the corresponding bolt holes, the attached steel plate 7 is arranged on the outer surface of the precast concrete wall plate 2, and the attached steel plate is connected with the nuts through the plurality of fixing bolts 6 through the corresponding reserved bolt holes.
Further, two parallel ear plates 8 are welded on the outer side of the attaching steel plate 7, tower crane attaching rods 9 are mounted on the two parallel ear plates 8, one ends of the tower crane attaching rods 9 are mounted on the attaching steel plate 7 through the ear plates 8, an attaching frame is mounted on a tower body, and finally the tail ends of the tower crane attaching rods 9 are connected with the attaching frame.
Further, frame 3 comprises three channel-section steel head-to-tail welding, and interior support 4 comprises two channel-section steel continuous welding, and two channel-section steel back-to-back setting in corresponding position on a pair of frame 3, and the interval is 50mm, and interior support 4 welds in frame 3, and the welding equipment is convenient, and rigidity is strong.
Further, the frame 3 is a right triangle, and two right-angle sides of the frame 3 are respectively attached to the precast concrete wallboard 2 and the composite floor slab 1.
Specifically, the fixing component comprises a plurality of high-strength bolts 5, a plurality of connecting plates 10 on two right-angle edges of the frame 3 are respectively provided with a reserved through hole 11, the reserved through holes 11 are used for the corresponding high-strength bolts 5 to pass through, reserved holes corresponding to the reserved through holes 11 are reserved on the concrete edge member 2 and the composite floor slab 1, the reserved holes are used for the high-strength bolts 5 to pass through, the reserved through holes 11 on the connecting plates 10 are aligned with the reserved holes, and the installation is completed by adopting the plurality of high-strength bolts 5 and nuts.
Furthermore, the three channel steels of the frame 3 are all 2C14a channel steels, and the inner support is 2C10 channel steels.
Further, the model of the reserved hole is A22, and the model of the high-strength bolt 5 is M20.
The invention also provides a construction method of the device for fixing the tower crane attachment arm in the fabricated building construction, which comprises the following specific steps:
s1, hoisting a lower laminated slab, binding steel bars on the laminated slab, reserving reserved holes in the binding process, and pouring concrete to form a lower laminated floor slab 1;
s2, after the concrete on the composite floor slab 1 is solidified to reach a certain strength, hoisting a plurality of precast concrete wall boards 16, after correction and positioning, sleeve grouting is carried out on the precast concrete wall boards, the precast concrete wall boards are fixed, the joints of two outer leaf boards 15 of adjacent precast concrete wall boards 16 form an outer template, edge component wall board reinforcing steel bars are bound at the intervals of the adjacent precast concrete wall boards 16, an inner template is installed after reserved holes, after reinforcement and stabilization, an upper laminated slab is hoisted, concrete is poured on the upper laminated slab and the intervals among the precast concrete wall boards 16 after binding upper laminated slab reinforcing steel bars, a concrete edge component 2 is formed, and the inner template is removed;
s3, after the concrete edge member 2 is cast in place, a triangular steel truss is arranged between the lower part of the inner side of the concrete edge member 2 and the lower Fang Diege floor slab 1, so that two right-angle sides of the frame 3 are respectively attached to the concrete edge member 2 and the composite floor slab 1, and reserved through holes 11 on the connecting plate 10 are aligned with reserved holes, pass through a plurality of high-strength bolts 5 and are screwed by nuts to finish installation;
s4, placing the attaching steel plate 7 on the outer surface of the concrete edge member 2, screwing down by adopting nuts after penetrating through the outer blade plate 15 and the reserved holes on the concrete edge member 2 through a plurality of fixing bolts 6, then installing one end of the tower crane attaching rod 9 on the attaching steel plate 7 through the lug plate 8, simultaneously installing the attaching frame on the tower body, and finally connecting the tail end of the tower crane attaching rod 9 with the attaching frame.
Further, when the precast concrete wall panel 2 is installed, the structural concrete strength of the composite floor slab 1 must reach more than 75% of the design strength.
As shown in fig. 5, for the installation of the T-shaped concrete edge member wall 13, only two triangular steel trusses are required to be respectively arranged on two sides of the T-shaped concrete edge member wall 13, and for the installation of the L-shaped concrete edge member wall 14, as shown in fig. 6, the universality is high.
The foregoing description of the preferred embodiments of the invention is not intended to limit the invention to the precise form disclosed, and any such modifications, equivalents, and alternatives falling within the spirit and scope of the invention are intended to be included within the scope of the invention.
Claims (6)
1. The utility model provides a device for fixed tower crane attaches arm of assembled building construction, includes upper and lower two coincide floor (1), its characterized in that, two install polylith precast concrete wallboard (16) between coincide floor (1), adjacent cast-in-place between precast concrete wallboard (16) have concrete edge component (2), the inboard lower part and the below of concrete edge component (2) install the triangle steel truss that is used for strengthening concrete edge component (2) between coincide floor (1), the triangle steel truss includes a pair of frame (3) and a pair of internal stay (4), the welding has polylith connecting plate (10) between the triangle steel truss, and fixed subassembly is all installed to the laminating limit of triangle steel truss and concrete edge component (2) and below coincide floor (1), install the attached steel sheet (7) of tower crane attaches arm on the lateral wall of concrete edge component (2), be equipped with many fixing bolts (6) on attached steel sheet (7), be equipped with a plurality of bolt holes on concrete edge component (2), a plurality of bolt holes (6) correspond to the bolt hole (8) are equipped with on two parallel connection plates (8) of two and are equipped with the reservation bolt (8) on the parallel connection plate (8), reserved through holes (11) are respectively arranged on a plurality of connecting plates (10) on two right-angle edges of the frame (3), the reserved through holes (11) are used for the corresponding high-strength bolts (5) to pass through, reserved holes corresponding to the reserved through holes (11) are reserved on the concrete edge member (2) and the laminated floor slab (1), the reserved holes are used for the high-strength bolts (5) to pass through,
the construction method for the device for fixing the tower crane attached arm in the fabricated building construction comprises the following specific steps:
s1, hoisting a lower laminated slab, binding reinforcing steel bars on the laminated slab, reserving reserved holes in the binding process, and pouring concrete to form a lower laminated floor slab (1);
s2, after concrete on the composite floor slab (1) is solidified to reach a certain strength, hoisting a plurality of precast concrete wall boards (16), after correction and positioning, sleeve grouting is carried out on the precast concrete wall boards (16), precast concrete wall board structures are fixed, the joint of two outer leaf boards (15) of adjacent precast concrete wall boards (16) forms an outer template, edge component wall board reinforcing steel bars are bound at the interval of the adjacent precast concrete wall boards (16), an inner template is mounted after reserved holes are reserved, after reinforcement and stabilization are carried out, an upper laminated slab is hoisted, concrete is poured at the interval between the upper laminated slab and the precast concrete wall boards (16) after binding the upper laminated slab reinforcing steel bars, so that a concrete edge component (2) is formed, and the inner template is removed;
s3, after the concrete edge member (2) is cast in place, a triangular steel truss is arranged between the lower part of the inner side of the concrete edge member (2) and the lower Fang Diege floor slab (1), so that two right-angle sides of the frame (3) are respectively attached to the concrete edge member (2) and the superposed floor slab (1), reserved through holes (11) on the connecting plate (10) are aligned with the reserved holes, and the installation is completed by passing through a plurality of high-strength bolts (5) and screwing nuts;
s4, placing an attaching steel plate (7) on the outer surface of the concrete edge member (2), penetrating through the outer leaf plates (15) and the reserved holes in the concrete edge member (2) through a plurality of fixing bolts (6), screwing down by nuts, then installing one end of a tower crane attaching rod (9) on the attaching steel plate (7) through an ear plate (8), simultaneously installing an attaching frame on a tower body, and finally connecting the tail end of the tower crane attaching rod (9) with the attaching frame.
2. The device for fixing the tower crane attachment arm for the fabricated building construction according to claim 1, wherein the frame (3) is formed by welding three channel steel heads and tails, the inner support (4) is formed by welding two channel steel heads in a connecting mode, the two channel steel heads at corresponding positions on the pair of frame (3) are arranged back to back, the distance is 50mm, and the inner support (4) is welded in the frame (3).
3. The device for fixing the tower crane attachment arm for the fabricated building construction according to claim 1, wherein the frame (3) is a right triangle, and two right-angle sides of the frame (3) are respectively attached to the concrete edge member (2) and the composite floor slab (1).
4. The device for fixing the tower crane attachment arm for the fabricated building construction according to claim 1, wherein three channel steels of the frame (3) are all 2C14a type channel steels, and the inner support (4) is a 2C10 channel steel.
5. The device for fixing the tower crane attachment arm for the fabricated building construction according to claim 1, wherein the model of the reserved hole is A22, and the model of the high-strength bolt (5) is M20 bolt.
6. A device for fixing tower crane attachment arms for prefabricated building construction according to claim 1, characterized in that the structural concrete strength of the composite floor slab (1) must reach more than 75% of the design strength when the concrete edge members (2) are installed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211143200.3A CN115535877B (en) | 2022-09-20 | 2022-09-20 | Device for fixing tower crane attached arm for fabricated building construction and construction method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211143200.3A CN115535877B (en) | 2022-09-20 | 2022-09-20 | Device for fixing tower crane attached arm for fabricated building construction and construction method |
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| Publication Number | Publication Date |
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| CN115535877A CN115535877A (en) | 2022-12-30 |
| CN115535877B true CN115535877B (en) | 2023-09-08 |
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| CN202211143200.3A Active CN115535877B (en) | 2022-09-20 | 2022-09-20 | Device for fixing tower crane attached arm for fabricated building construction and construction method |
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Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
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| US3763617A (en) * | 1972-04-03 | 1973-10-09 | C M H Inc | Tieback apparatus |
| CN105649334A (en) * | 2016-01-28 | 2016-06-08 | 合肥建工集团有限公司 | Concrete shear wall tower crane wall-attachment construction method and device thereof |
| CN107460954A (en) * | 2017-09-21 | 2017-12-12 | 中国建筑股份有限公司 | A kind of post-tensioned prestressing assembling concrete frame energy dissipation component system and construction method |
| CN208603614U (en) * | 2018-08-28 | 2019-03-15 | 北京城乡建设集团有限责任公司 | Tower crane anchor for fabricated construction |
| CN209260960U (en) * | 2018-11-10 | 2019-08-16 | 中建七局第一建筑有限公司 | It is a kind of to facilitate the wall for installing interim bearing diagonal |
| CN212740510U (en) * | 2020-07-23 | 2021-03-19 | 中国建筑第二工程局有限公司 | Nondestructive steel column tower crane attachment device |
| CN215479321U (en) * | 2021-09-18 | 2022-01-11 | 大同泰瑞集团建设有限公司 | Tower crane that can have enough to meet need use attaches wall auxiliary fixture |
-
2022
- 2022-09-20 CN CN202211143200.3A patent/CN115535877B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3763617A (en) * | 1972-04-03 | 1973-10-09 | C M H Inc | Tieback apparatus |
| CN105649334A (en) * | 2016-01-28 | 2016-06-08 | 合肥建工集团有限公司 | Concrete shear wall tower crane wall-attachment construction method and device thereof |
| CN107460954A (en) * | 2017-09-21 | 2017-12-12 | 中国建筑股份有限公司 | A kind of post-tensioned prestressing assembling concrete frame energy dissipation component system and construction method |
| CN208603614U (en) * | 2018-08-28 | 2019-03-15 | 北京城乡建设集团有限责任公司 | Tower crane anchor for fabricated construction |
| CN209260960U (en) * | 2018-11-10 | 2019-08-16 | 中建七局第一建筑有限公司 | It is a kind of to facilitate the wall for installing interim bearing diagonal |
| CN212740510U (en) * | 2020-07-23 | 2021-03-19 | 中国建筑第二工程局有限公司 | Nondestructive steel column tower crane attachment device |
| CN215479321U (en) * | 2021-09-18 | 2022-01-11 | 大同泰瑞集团建设有限公司 | Tower crane that can have enough to meet need use attaches wall auxiliary fixture |
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| CN115535877A (en) | 2022-12-30 |
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