CN113479774A - Truss structure dismantling method - Google Patents
Truss structure dismantling method Download PDFInfo
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- CN113479774A CN113479774A CN202110739384.9A CN202110739384A CN113479774A CN 113479774 A CN113479774 A CN 113479774A CN 202110739384 A CN202110739384 A CN 202110739384A CN 113479774 A CN113479774 A CN 113479774A
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- 238000000034 method Methods 0.000 title claims abstract description 44
- 239000000725 suspension Substances 0.000 claims description 13
- 230000000149 penetrating effect Effects 0.000 claims description 3
- 230000009286 beneficial effect Effects 0.000 abstract description 4
- 238000009435 building construction Methods 0.000 abstract description 2
- 238000010276 construction Methods 0.000 description 10
- 230000002349 favourable effect Effects 0.000 description 5
- 229910000831 Steel Inorganic materials 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 239000000178 monomer Substances 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 238000004804 winding Methods 0.000 description 2
- 230000004075 alteration Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
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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
- B66C13/00—Other constructional features or details
- B66C13/04—Auxiliary devices for controlling movements of suspended loads, or preventing cable slack
- B66C13/08—Auxiliary devices for controlling movements of suspended loads, or preventing cable slack for depositing loads in desired attitudes or positions
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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
- B66C13/00—Other constructional features or details
- B66C13/04—Auxiliary devices for controlling movements of suspended loads, or preventing cable slack
- B66C13/06—Auxiliary devices for controlling movements of suspended loads, or preventing cable slack for minimising or preventing longitudinal or transverse swinging of loads
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66D—CAPSTANS; WINCHES; TACKLES, e.g. PULLEY BLOCKS; HOISTS
- B66D3/00—Portable or mobile lifting or hauling appliances
- B66D3/04—Pulley blocks or like devices in which force is applied to a rope, cable, or chain which passes over one or more pulleys, e.g. to obtain mechanical advantage
- B66D3/06—Pulley blocks or like devices in which force is applied to a rope, cable, or chain which passes over one or more pulleys, e.g. to obtain mechanical advantage with more than one pulley
- B66D3/08—Arrangements of sheaves
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
- E04G5/00—Component parts or accessories for scaffolds
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Conveying And Assembling Of Building Elements In Situ (AREA)
- Working Measures On Existing Buildindgs (AREA)
Abstract
The application discloses a method for dismantling a truss structure, which belongs to the technical field of building construction and comprises the following steps: dismantling the truss structure into a plurality of sub-trusses; the tower crane is connected with one end of the sub-truss and used for providing an upward inclined pulling force deviated to one side of the sub-truss; an auxiliary hoisting device is arranged in the projection area, is connected with the other end of the sub-truss and is used for providing an upward inclined pulling force deviated to the other side of the sub-truss; the projection area is an area where the overhanging outer frame projects on the ground; the tower crane and the auxiliary hoisting device synchronously hoist the sub-truss to enable the sub-truss to leave the projection area; and after the sub-truss leaves the projection area, the auxiliary hoisting device stops hoisting, and the tower crane hoists the sub-truss to the ground. The method for dismantling the truss structure can make full use of the hoisting performance of the tower crane, reduces dismantling workload, and is beneficial to improving operation efficiency.
Description
Technical Field
The application relates to the technical field of building construction, in particular to a method for dismantling a truss structure.
Background
With the development of economic society, more and more overhanging buildings emerge. The overhanging building generally comprises a core tube and an overhanging outer frame, and due to the structural characteristics of the overhanging outer frame, a truss structure needs to be erected firstly during construction so as to realize temporary support of the overhanging structure and facilitate construction. After the building is wholly accomplished, need demolish the truss structure, however, because the truss structure part is located the structure of encorbelmenting in the projection district on ground, and truss structure volume and quality are great, the tower crane can't directly carry out the handling to the truss structure, simultaneously, also because the whole height of truss structure is less than the operation height of crane, in the relevant operation in industry, generally need use ground small-size machine equipment to transport, the process probably is: generally, a truss structure is firstly cut into a plurality of sub-trusses, and then the removed sub-trusses are transported out of a projection area through ground equipment such as a forklift.
Disclosure of Invention
The present application is directed to solving at least one of the problems in the prior art. Therefore, the application provides a method for dismantling the truss structure, which can make full use of the hoisting performance of a tower crane, reduce the dismantling workload and be beneficial to improving the operation efficiency.
The method for dismantling the truss structure comprises the following steps:
dismantling the truss structure into a plurality of sub-trusses;
the tower crane is connected with one end of the sub-truss and used for providing an upward inclined pulling force biased to one side of the sub-truss;
an auxiliary hoisting device is arranged in the projection area, is connected with the other end of the sub-truss and is used for providing an upward inclined pulling force deviated to the other side of the sub-truss; the projection area is an area where the overhanging outer frame projects on the ground;
the tower crane and the auxiliary hoisting device synchronously hoist the sub-truss to enable the sub-truss to leave a projection area;
and after the sub-truss leaves the projection area, the auxiliary hoisting device stops hoisting, and the tower crane hoists the sub-truss to the ground.
The method for dismantling the truss structure according to the embodiment of the application has at least the following beneficial effects:
firstly, dismantling a truss structure into a plurality of sub-trusses, and meanwhile, arranging an auxiliary hoisting device in a projection area, wherein the auxiliary hoisting device is matched with a tower crane to hoist the sub-trusses together, so that the sub-trusses can move in the vertical direction and leave the truss structure, and safety accidents caused by collision between the sub-trusses and the truss structure in a hoisting process are prevented; when the sub-truss is lifted for a certain distance, the tower crane slowly pulls the truss structure out of the projection area, and meanwhile, the auxiliary lifting device is matched with the tower crane to enable the sub-truss to stably leave the projection area.
Through such setting, but make full use of the handling performance of tower crane, can demolish into the monomer sub-truss of great volume with truss structure, can increase the sub-truss volume of handling at every turn to be favorable to sparingly demolising work load, improve and demolish efficiency.
According to the truss structure dismantling method provided by the embodiment of the application, the auxiliary hoisting device is arranged in the projection area, and the truss structure dismantling method further comprises the following steps:
arranging a traction device on the ground; the traction device is arranged in the projection area and far away from the edge of the projection area;
and a suspension device is arranged at the bottom of the overhanging outer frame, and the sub-truss and the traction device are connected through a hanging chain penetrating through the suspension device.
According to the truss structure dismantling method provided by the embodiment of the application, the tower crane and the auxiliary hoisting device synchronously hoist the sub-truss to enable the sub-truss to leave a projection area, and the method comprises the following steps:
when the tower crane lifts the sub-truss, the traction device is synchronously started to wind the lifting chain, so that the sub-truss is lifted in the vertical direction;
after the sub-truss is hoisted for a certain height distance, the tower crane pulls the sub-truss out of the projection area, and meanwhile, the traction device synchronously and slowly releases the lifting chain and enables the lifting chain to keep a tensioning state.
According to the truss structure dismantling method, the suspension device is a fixed pulley.
According to the method for dismantling the truss structure, the auxiliary lifting device further comprises a movable pulley, the movable pulley is hung on the sub-truss, one end of the lifting chain is fixed on the fixed pulley, the other end of the lifting chain is wound on the traction device, and the middle section of the lifting chain is wound on the movable pulley and the fixed pulley respectively.
According to the truss structure dismantling method, the sub-truss is further hung with the traction rope, and the traction rope is used for drawing the sub-truss to leave the projection area.
According to the method for dismantling the truss structure, the tower crane adopts two-point hoisting for hoisting the sub-truss.
Additional aspects and advantages of the present application will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the present application.
Drawings
The above and/or additional aspects and advantages of the present application will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:
FIG. 1 is a schematic view of a core barrel and an overhanging outer frame of the present application;
FIG. 2 is a schematic illustration of the support of the truss structure of the present application;
FIG. 3 is a schematic diagram of a tower crane and an auxiliary hoisting device hoisting a sub-truss in the vertical direction together;
FIG. 4 is a schematic diagram of a tower crane pulling a sub-truss out of a projection area in the application;
fig. 5 is a schematic view of the installation of the fixed pulley and the movable pulley in the present application.
Reference numerals:
a truss structure 100; a sub-truss 110;
a traction device 210; a hoist chain 220; a fixed pulley 230; a movable pulley 240;
an overhanging outer frame 300;
the rope 500 is pulled.
Detailed Description
Reference will now be made in detail to the embodiments of the present application, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary only for the purpose of explaining the present application and are not to be construed as limiting the present application.
In the description of the present application, it is to be understood that the positional descriptions, such as the directions of up, down, left, right, front, rear, and the like, referred to as positional or positional relationships are based on the directions or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present application.
In the description of the present application, unless otherwise expressly limited, terms such as set, mounted, connected and the like should be construed broadly, and those skilled in the art can reasonably determine the specific meaning of the terms in the present application by combining the detailed contents of the technical solutions.
Referring to fig. 1 to 5, a method for dismantling a truss structure according to an embodiment of the present application includes the steps of:
the truss structure 100 is dismantled into a plurality of sub-trusses 110;
the tower crane 400 is connected with one end of the sub-truss 110 and is used for providing an upward inclined pulling force biased to one side of the sub-truss 110;
an auxiliary hoisting device is arranged in the projection area, is connected with the other end of the sub-truss 110 and is used for providing an upward inclined pulling force which is deviated to the other side of the sub-truss 110; wherein, the projection area is the area of the overhanging outer frame 300 projected on the ground;
the tower crane 400 and the auxiliary hoisting device synchronously hoist the sub-truss 110 to enable the sub-truss 110 to leave the projection area;
after the sub-truss 110 leaves the projection area, the auxiliary lifting device stops lifting, and the tower crane 400 lifts the sub-truss 110 to the ground.
It can be understood that, referring to fig. 1 and 2, since the truss structure 100 is located in the projection area of the overhanging outer frame 300 on the ground, when the hook of the tower crane 400 is in the free-standing state, the hook is not located above the truss structure 100, but located laterally above the truss structure 100, and therefore, if the sub-truss 110 is directly lifted by using the tower crane 400, the sub-truss 110 will sway to a large extent, which causes unstable lifting and may cause a production accident in a serious case.
Therefore, in order to solve the above problems and also to exert the hoisting advantages of the tower crane 400 and improve the dismantling efficiency, an auxiliary hoisting device is arranged in the projection area, and the auxiliary hoisting device and the tower crane 400 jointly hoist the truss structure 100 away from the projection area.
Referring to fig. 3 to 5, it is to be understood that the tower crane 400 is connected to one end of the sub-truss 110 and serves to provide a pulling force biased to one side of the sub-truss 110; an auxiliary trolley is connected to the other end of the sub-truss 110 and is used to provide a pulling force biased towards the other side of the sub-truss 110. During lifting, the tower crane 400 provides a vertical upward component force and a horizontal component force towards the outer side of the projection area, the auxiliary lifting device provides a vertical upward component force and a component force towards the inner side of the projection area, and the tower crane 400 and the auxiliary lifting device respectively offset the horizontal component forces of the sub-truss 110 by controlling the lifting force of the tower crane 400 and the lifting force of the auxiliary lifting device, so that the sub-truss 110 can be lifted in the vertical direction.
Specifically, the disassembling and lifting process is as follows. Referring to fig. 3, before lifting, the truss structure 100 is firstly disassembled into a plurality of sub-trusses 110 one by one, and then the auxiliary lifting device and the tower crane 400 are controlled to enable the horizontal component forces of the sub-trusses 110 to counteract each other, so that the sub-trusses 110 can be lifted in the vertical direction and stably leave the truss structure 100, thereby preventing safety accidents caused by collision between the sub-trusses 110 and the truss structure 100 in the lifting process; referring to fig. 4, after the sub-truss 110 is lifted for a certain distance, the auxiliary lifting device is controlled to gradually reduce the lifting force on the sub-truss 110, and meanwhile, the tower crane 400 slowly pulls the truss structure 100 out of the projection area, and in the process, the auxiliary lifting device and the tower crane 400 jointly maintain the stability of the sub-truss 110 in the lifting process; after the sub-truss 110 completely leaves the projection area, the auxiliary lifting device does not apply lifting force to the sub-truss 110 any more, and the sub-truss 110 is lifted to a storage point on the ground completely by the tower crane 400, so that the whole construction step is completed.
Through such arrangement, the hoisting performance of the tower crane 400 can be fully utilized, the truss structure 100 can be dismantled into the sub-truss 110 with a larger volume, and the volume of the sub-truss 110 hoisted each time can be increased, so that the dismantling workload can be saved, and the dismantling efficiency can be improved.
In some embodiments of the application, an auxiliary lifting device is arranged in the projection area, and the method further comprises the following steps:
arranging a traction device 210 on the ground; the traction device 210 is disposed in the projection area and far away from the edge of the projection area;
a suspension device is provided at the bottom of the cantilever outer frame 300, and the sub-truss 110 and the traction device 210 are connected by a suspension chain 220 inserted into the suspension device.
It is understood that the traction device 210 may be a winch, or may be other devices with a rope winding function, and the traction device 210 is not limited thereto. Set up linkage, for example, lifting hook, loose pulley assembly etc. on the girder steel of frame 300 bottom encorbelments, linkage so sets up, but make full use of construction environment need not to erect other construction equipment, and it is convenient and the cost is lower to set up, simultaneously, still can set up according to the position flexibility of sub-truss 110, makes things convenient for supplementary overhead hoist's setting. The hoist chain 220 is inserted into the suspension device and connects the traction device 210 and the sub-truss 110, thereby completing the installation of the auxiliary hoist.
Referring to fig. 3 and 4, it should be understood that the traction device 210 is disposed in the projection area and far away from the edge of the projection area, so that the acting force of the sub-truss 110 from the auxiliary hoisting device is toward the inside of the projection area in the hoisting process, and the acting force of the tower crane 400 on the sub-truss 110 is toward the outside of the projection area, therefore, by such an arrangement, the sub-truss 110 can move in the vertical direction under the common hoisting of the tower crane 400 and the auxiliary hoisting device, so that the sub-truss 110 can leave the truss structure 100 in advance, and the sub-truss 110 is prevented from colliding with other non-hoisted truss structures 100 in the hoisting process.
It should be understood that, when the sub-truss 110 is lifted for a certain distance, the tower crane 400 slowly lifts the sub-truss 110 to the outside of the projection area, and at the same time, the traction device 210 slowly releases the hanging chain 220 and keeps the hanging chain 220 in a tensioned state, so that the sub-truss 110 can smoothly leave the projection area in the horizontal direction.
In some embodiments of the present application, the tower crane 400 and the auxiliary hoist synchronously hoist the sub-truss 110 to make the sub-truss 110 leave the projection area, including the following steps:
when the tower crane 400 lifts the sub-truss 110, the traction device 210 synchronously starts the winding lifting chain 220, so that the sub-truss 110 is lifted in the vertical direction;
after the sub-truss 110 is lifted for a certain height distance, the tower crane 400 pulls the sub-truss 110 out of the projection area, and meanwhile, the traction device 210 synchronously and slowly releases the hanging chain 220 and keeps the hanging chain 220 in a tension state.
It can be understood that, because draw gear 210 sets up in the projection district, and keep away from the edge in projection district, therefore, in handling process, sub-truss 110 receives the effort of supplementary overhead hoist and is towards projection district inside, and sub-truss 110 receives the effort of tower crane 400 for being towards projection district outside, therefore, so set up, can make sub-truss 110 can move along vertical direction under tower crane 400 and supplementary overhead hoist's common handling, can avoid sub-truss 110 in the in-process of being hung from projection district, sub-truss 110 collides with the truss structure 100 that the surplus was not hoisted, be favorable to improving the security of construction operation.
When the tower crane 400 and the auxiliary hoisting device hoist the sub-truss 110 for a certain height distance and the hook of the tower crane 400 moves towards the direction outside the projection area, the traction device 210 synchronously and slowly releases the hanging chain 220 and keeps the hanging chain 220 in a tension state, so that the sub-truss 110 can smoothly leave the projection area along the horizontal direction. Through such setting, make the handling process of sub-truss 110 more steady, reduce rocking of sub-truss 110 when fishing the handling, be favorable to the security of guarantee construction operation.
In some embodiments of the present application, the suspension device is a fixed pulley 230.
It can be understood that, by such an arrangement, the friction force of the hoist chain 220 can be reduced, and the hoisting process of the auxiliary hoisting device is smoother.
In some embodiments of the present application, the auxiliary lifting device further includes a movable pulley 240, the movable pulley 240 is hung on the sub-truss 110, one end of the lifting chain 220 is fixed to the fixed pulley 230, the other end of the lifting chain is wound on the traction device 210, and the middle sections of the lifting chain are respectively wound around the movable pulley 240 and the fixed pulley 230.
Referring to fig. 5, it can be understood that a lifting force can be saved by providing the movable pulley 240 and the fixed pulley 230. So set up, under the certain circumstances of draw gear 210 traction force, can cooperate tower crane 400 handling bigger volume or the sub-truss 110 of bigger quality for constructor can demolish truss structure 100 for the sub-truss 110 of monomer of great volume when demolising truss structure 100, reduces the work load of demolising the operation, makes things convenient for the construction operation personnel to be under construction, is favorable to improving the operating efficiency.
In some embodiments of the present application, a pulling rope 500 is further hung on the sub-truss 110, and the pulling rope 500 is used for pulling the sub-truss 110 to leave the projection area.
Referring to fig. 3 to 5, it can be understood that, in the process of slowly lifting the sub-truss 110 out of the projection area, it is still difficult to maintain the stability of the sub-truss 110 in the lifting process only by the aid of the auxiliary lifting device and the tower crane 400, and the sub-truss 110 is prone to shaking in the lifting process, which affects the safety of the construction operation. For this, the pulling rope 500 needs to be hung on the sub-truss 110, and the pulling rope 500 may be hung on the sub-truss 110 in advance before the sub-truss 110 is hoisted.
Specifically, when the sub-truss 110 is lifted to a certain height and starts to gradually move to the outer side of the projection area, ground constructors cooperate with the tower crane 400 and the auxiliary lifting device to actuate the traction ropes 500 to synchronously operate, so that the sub-truss 110 can stably move to the outer side of the projection area, and the arrangement is favorable for improving the safety of the operation area.
In some embodiments of the present application, the tower crane 400 adopts two-point hoisting for the hoisting of the sub-truss 110.
It will be appreciated that such an arrangement is beneficial to improve the stability of the sub-truss 110 during handling.
The truss removal method of the present application will be described below in one general embodiment with reference to fig. 2 to 5.
First, preparation work is performed in the early stage.
A suspension device is arranged on a steel beam at the bottom of the overhanging outer frame 300, the suspension device can be a fixed pulley 230, three lifting lugs are arranged on the sub-truss 110, wherein two lifting lugs are arranged at two side ends of the top of the sub-truss 110, the other lifting lug is arranged in the middle of the top of the sub-truss 110, a movable pulley 240 is hung on the lifting lug facing the inner side of the projection area on the sub-truss 110, a lifting rope is connected between the two remaining lifting lugs on the sub-truss 110, and meanwhile, a traction rope 500 is arranged on the lifting lug facing the outer side of the projection area on the sub-truss 110 in a penetrating manner; hang the lifting hook of establishing tower crane 400 with the lifting rope, in the projection district, and keep away from the edge in projection district and set up draw gear 210, be fixed in fixed pulley 230, the middle section with lifting chain 220 one end with its other end around locating on draw gear 210 after wearing to locate movable pulley 240 and fixed pulley 230 in proper order.
Second, the sub-truss 110 is hoisted in the vertical direction by a certain height distance.
The tower crane 400 lifts the sub-truss 110, and simultaneously, the traction device 210 is synchronously started to wind the lifting chain 220, so that the sub-truss 110 is lifted stably at a constant speed along the vertical direction until a certain height distance is formed between the sub-truss 110 and the non-lifted truss structure 100.
Third, the sub-truss 110 is hoisted away from the projection area.
After the sub-truss 110 is lifted for a certain height distance, the hook of the tower crane 400 moves towards the direction outside the projection area, so that the sub-truss 110 is pulled to move towards the direction outside the projection area, meanwhile, the traction device 210 synchronously and slowly releases the hanging chain 220 and keeps the hanging chain 220 in a tensioning state, and therefore the sub-truss 110 can stably leave the projection area along the horizontal direction; in this process, the ground builder moves the sub-truss 110 in a predetermined direction by pulling the pulling string 500 until the sub-truss 110 completely leaves the projection area.
Fourth, the sub-truss 110 is released to the ground.
After the sub-truss 110 completely leaves the projection area, the traction device 210 completely releases the lifting chain 220, and the tower crane 400 slowly lifts the sub-truss 110 to the ground, so that the lifting of the sub-truss 110 is completed.
In the description herein, reference to the description of the terms "one embodiment," "some embodiments," "an illustrative embodiment," "an example," "a specific example," or "some examples" or the like means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the application. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
While embodiments of the present application have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the application, the scope of which is defined by the claims and their equivalents.
Claims (7)
1. The method for dismantling the truss structure is characterized by comprising the following steps of:
dismantling the truss structure into a plurality of sub-trusses;
the tower crane is connected with one end of the sub-truss and used for providing an upward inclined pulling force biased to one side of the sub-truss;
an auxiliary hoisting device is arranged in the projection area, is connected with the other end of the sub-truss and is used for providing an upward inclined pulling force deviated to the other side of the sub-truss; the projection area is an area where the overhanging outer frame projects on the ground;
the tower crane and the auxiliary hoisting device synchronously hoist the sub-truss to enable the sub-truss to leave a projection area;
and after the sub-truss leaves the projection area, the auxiliary hoisting device stops hoisting, and the tower crane hoists the sub-truss to the ground.
2. The method for dismantling the truss structure according to claim 1, wherein an auxiliary lifting device is arranged in the projection area, and the method comprises the following steps:
arranging a traction device on the ground; the traction device is arranged in the projection area and far away from the edge of the projection area;
and a suspension device is arranged at the bottom of the overhanging outer frame, and the sub-truss and the traction device are connected through a hanging chain penetrating through the suspension device.
3. The method of demolishing a truss structure according to claim 2, wherein: the tower crane and the auxiliary hoisting device synchronously hoist the sub-truss to enable the sub-truss to leave a projection area, and the method comprises the following steps:
when the tower crane lifts the sub-truss, the traction device is synchronously started and winds the lifting chain, so that the sub-truss is lifted in the vertical direction;
after the sub-truss is hoisted for a certain height distance, the tower crane pulls the sub-truss out of the projection area, and meanwhile, the traction device synchronously and slowly releases the lifting chain and enables the lifting chain to keep a tensioning state.
4. The method of demolishing a truss structure according to claim 2, wherein: the suspension device is a fixed pulley.
5. The truss structure demolition method as defined in claim 4 wherein: the auxiliary hoisting device further comprises a movable pulley, the movable pulley is hung on the sub-truss, one end of the hoisting chain is fixed on the fixed pulley, the other end of the hoisting chain is wound on the traction device, and the middle section of the hoisting chain is wound on the movable pulley and the fixed pulley respectively.
6. The method of demolishing a truss structure according to claim 1, wherein: and a traction rope is hung on the sub-truss and used for drawing the sub-truss to leave the projection area.
7. The method of demolishing a truss structure according to claim 1, wherein: and the tower crane adopts two-point hoisting for hoisting the sub-truss.
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| CN202110739384.9A CN113479774B (en) | 2021-06-30 | 2021-06-30 | Truss structure dismantling method |
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| CN202110739384.9A CN113479774B (en) | 2021-06-30 | 2021-06-30 | Truss structure dismantling method |
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| CN103058054A (en) * | 2012-12-27 | 2013-04-24 | 三一重工股份有限公司 | Tail device and tail dragging method |
| CN110510501A (en) * | 2018-05-22 | 2019-11-29 | 宏润建设集团股份有限公司 | Steel reinforcement cage integral hoisting method and hanging apparatus |
| CN209367766U (en) * | 2018-10-30 | 2019-09-10 | 南通市海洋水建工程有限公司 | A kind of ultralong steel tube stake turnover device suitable for plurality of specifications |
| CN109969946A (en) * | 2019-04-09 | 2019-07-05 | 西南林业大学 | A kind of diaphram wall steel reinforcement cage hoisting and hanging construction safety method |
| CN212050137U (en) * | 2020-01-17 | 2020-12-01 | 中铁大桥局第七工程有限公司 | Hoisting system for preventing truss sheet of arch structure from inclining |
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