CN111017696A - Hoisting method of integrally assembled prefabricated part - Google Patents
Hoisting method of integrally assembled prefabricated part Download PDFInfo
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- CN111017696A CN111017696A CN201911224468.8A CN201911224468A CN111017696A CN 111017696 A CN111017696 A CN 111017696A CN 201911224468 A CN201911224468 A CN 201911224468A CN 111017696 A CN111017696 A CN 111017696A
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- lifting
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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
- B66C1/00—Load-engaging elements or devices attached to lifting or lowering gear of cranes or adapted for connection therewith for transmitting lifting forces to articles or groups of articles
- B66C1/10—Load-engaging elements or devices attached to lifting or lowering gear of cranes or adapted for connection therewith for transmitting lifting forces to articles or groups of articles by mechanical means
- B66C1/12—Slings comprising chains, wires, ropes, or bands; Nets
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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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Abstract
The invention discloses an integral hoisting method of an assembly type prefabricated part, which is characterized in that when the prefabricated part is assembled, hoisting rings for hoisting and a limiting ring for limiting the inclination of the prefabricated part are arranged on the prefabricated part; when in hoisting, a multifunctional hoisting tool is adopted for hoisting; a lifting lug for connecting hoisting equipment is arranged at the top of the multifunctional lifting appliance and is connected with a hook on the hoisting equipment through a hoisting sling; the bottom of the multifunctional lifting appliance is provided with a lifting beam for lifting the prefabricated part, the lifting beam is provided with a lifting hole, and the lifting hole is connected with one end of a sling of the part; the other end of the sling of the component penetrates through the limiting ring to be connected with a hanging ring on the prefabricated component. The invention has the advantages of high construction efficiency, green and environment-friendly construction process, material saving and the like, and can improve the construction quality and the construction progress of the fabricated building.
Description
Technical Field
The invention relates to a hoisting method of an integrally assembled prefabricated part, and belongs to the technical field of integral hoisting in building construction.
Background
The assembly type building is a novel industrialized building mode, has the advantages of high construction efficiency, short period, safe and environment-friendly construction process, manpower and material conservation and the like, is a building form with great development potential suitable for modern construction, and has been applied and developed on a large scale in recent years. The integral hoisting of the on-site prefabricated parts is an essential link in the construction process of the fabricated building, however, the fabricated prefabricated parts are generally concrete members, and because the fabricated prefabricated parts have the characteristics of large volume, heavy mass, specific geometric shapes and the like, the difficulty of the hoisting process is higher, and the fabricated parts are extremely easy to damage. In recent years, some lifting appliances assembled by detachable on-site splicing and welding molds and pulley lifting ropes are used for lifting in the industry, and although the problem of on-site lifting of partially assembled prefabricated parts can be solved, the problems of complex matching tools, complex on-site operation, unstable lifting process and the like still exist. Therefore, the hoisting of the prefabricated components is a major problem to be broken through in the prefabricated building industry.
Disclosure of Invention
The invention aims to provide a hoisting method of an integrally assembled prefabricated part, which has the characteristics of diversified hoisting objects, simplicity and convenience in operation, high construction efficiency, high in-place precision, stable hoisting process, small damage degree to hoisted objects and high safety coefficient in the operation process, thereby overcoming the defects of the prior art.
In order to achieve the purpose, the invention adopts the following technical scheme:
the invention relates to an integral hoisting method of an assembly type prefabricated part, which is characterized in that when the prefabricated part is assembled, hoisting rings for hoisting and a limiting ring for limiting the inclination of the prefabricated part are arranged on the prefabricated part; when in hoisting, a multifunctional hoisting tool is adopted for hoisting; a lifting lug for connecting hoisting equipment is arranged at the top of the multifunctional lifting appliance and is connected with a hook on the hoisting equipment through a hoisting sling; the bottom of the multifunctional lifting appliance is provided with a lifting beam for lifting the prefabricated part, the lifting beam is provided with a lifting hole, and the lifting hole is connected with one end of a sling of the part; the other end of the sling of the component penetrates through the limiting ring to be connected with a hanging ring on the prefabricated component.
In the integral hoisting method of the prefabricated part, the prefabricated part is provided with four hoisting rings symmetrical to the gravity center of the prefabricated part, a limiting ring corresponding to the position of each hoisting ring is arranged above each hoisting ring on the prefabricated part, and the limiting rings and the corresponding hoisting rings are positioned on the same vertical line; the vertical stress of the hoisting ring is ensured through the limiting ring, and the extrusion or bending deformation and the unfavorable inclination of the prefabricated part during hoisting are prevented.
In the integral hoisting method of the prefabricated part, the multifunctional hoisting tool is of a rectangular frame structure, four corners of the top of the multifunctional hoisting tool are respectively provided with a hoisting lug, and the four hoisting lugs are respectively connected with a hook on hoisting equipment through hoisting slings with the same length; to ensure the balance of the multifunctional spreader.
In the integral hoisting method of the prefabricated part, lifting lugs are respectively arranged at four corners of the top of the multifunctional hoisting tool, two pairs of lifting lugs at opposite angles are respectively connected through hoisting slings with the same length, and the middle points of the hoisting slings connecting each pair of lifting lugs at opposite angles are hung on a hook of hoisting equipment; to ensure the balance of the multifunctional spreader.
In the integral hoisting method of the prefabricated part, the bottom of the multifunctional hoisting tool is provided with a hoisting beam for hoisting the prefabricated part, and the hoisting beam is provided with a group of hoisting holes; selecting different lifting holes to enable the vertical position of a sling of a component connected with the lifting hole to correspond to the position of a lifting ring on the prefabricated component; to accommodate different sizes of prefabricated components.
In the integral hoisting method of the prefabricated part, the number of the part slings is four, and the lengths of the four part slings are the same; each component sling is connected with one of the hoisting rings on the prefabricated component; so as to ensure the balance of the prefabricated parts during hoisting.
In the integral hoisting method of the prefabricated part, the method comprises the following steps: preparing for hoisting → connecting a multifunctional hoisting tool → selecting a hoisting hole site → moving hoisting equipment to the position right above a prefabricated part → connecting the prefabricated part → checking the verticality and reliability of a sling of the prefabricated part → rechecking the balance of the prefabricated part → transferring the prefabricated part → placing the prefabricated part → dismantling the hoisting tool and the hoisting equipment; the method comprises the following specific steps:
preparing a multifunctional lifting appliance, a lifting sling, a component sling and tools for lifting; and moving the hoisting equipment to the site;
connecting the hoisting sling with lifting lugs at four corners of the top of the multifunctional lifting appliance, and hanging the hoisting sling on a hook of hoisting equipment; pre-hoisting the multifunctional lifting appliance to ensure that the multifunctional lifting appliance is in a balanced state;
measuring the distance between the hanging rings on the prefabricated part and the distance between the hanging rings and the top end of the prefabricated part by using a measuring tape, selecting the positions of hanging holes to be connected on the hanging beam according to the distance between the hanging rings, and selecting the length of a sling of the prefabricated part according to the distance between the hanging rings and the top end of the prefabricated part;
connecting one ends of the four component slings with selected lifting holes on a lifting beam at the bottom of the multifunctional lifting appliance, naturally allowing the other ends of the four component slings to droop, and moving the lifting equipment to enable the vertical lines of the four component slings to correspond to the positions of lifting rings on the prefabricated components;
fifthly, the other ends of the slings of the four components penetrate through a limiting ring on the prefabricated component and are connected with a hanging ring on the prefabricated component;
step six, controlling the hoisting equipment to slowly and stably rise, pausing when the slings of the four components are just in a stretched and tensioned state, and confirming whether the verticality of the slings of the components meets the requirement by means of a triangular ruler; if the connection is reliable, the next step is carried out after the connection is confirmed to be correct;
step seven, when the hoisting equipment is controlled to slowly and stably rise to the height of 30-50cm from the ground to the bottom surface of the prefabricated part, the hoisting equipment is suspended, the balance degree of the prefabricated part is checked, whether the slings of the four parts are vertically tightened and uniformly stressed is confirmed by means of a limiting ring, and the next step is carried out after the situation that no errors exist is confirmed;
step eight, confirming that the target placement points of the prefabricated parts are cleaned, and stably operating the hoisting equipment to transfer the prefabricated parts to the target placement points;
step nine, pausing after the prefabricated part is transferred to a position about 50cm above the target position, slowly descending a steel rope of the hoisting equipment, and placing the prefabricated part in a positioning control line of a target placing point plane;
step ten, after the prefabricated part is checked to be in place, the connection between the sling of the part and the hanging ring is removed, the hoisting equipment is transferred to a safe area, and the multifunctional sling, the hoisting sling and the sling of the part are removed.
Due to the adoption of the technical scheme, compared with the prior art, the lifting appliance is simple in structure, convenient to process, light in weight and convenient to operate; the hoisting objects are diversified, and the method is suitable for field hoisting and transferring of various prefabricated parts such as an assembled integral toilet, an assembled laminated slab and the like; only 3-5 operators and one hoisting device are needed on site during operation, so that the labor and material cost is saved. The hoisting method is simple and convenient to operate, and is easy to standardize related operation flows, so that the training and management of operators are facilitated; the construction efficiency is high, and the average hoisting time of each prefabricated part is about 10-20 min; the hoisting in-place precision is high, the hoisting object is positioned through the positioning line, and the hoisting object is accurately in place; the hoisting process is stable, and the damage degree to hoisted objects is small; the safety factor of the operation process is high.
Drawings
Fig. 1 is a schematic view of an embodiment of the present invention.
The labels in the figures are: 1-prefabricated part, 2-lifting ring, 3-limiting ring, 4-part sling, 5-multifunctional sling, 6-lifting lug, 7-lifting sling, 8-hook, 9-lifting beam and 10-lifting hole.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and examples.
The invention relates to an integral hoisting method of an assembly type prefabricated part, which is characterized in that when the prefabricated part is assembled, hoisting rings for hoisting and a limiting ring for limiting the inclination of the prefabricated part are arranged on the prefabricated part; when in hoisting, a multifunctional hoisting tool is adopted for hoisting; a lifting lug for connecting hoisting equipment is arranged at the top of the multifunctional lifting appliance and is connected with a hook on the hoisting equipment through a hoisting sling; the bottom of the multifunctional lifting appliance is provided with a lifting beam for lifting the prefabricated part, the lifting beam is provided with a lifting hole, and the lifting hole is connected with one end of a sling of the part; the other end of the sling of the component penetrates through the limiting ring to be connected with a hanging ring on the prefabricated component. The prefabricated part is provided with four hanging rings symmetrical to the gravity center of the prefabricated part, the prefabricated part above the hanging rings is provided with limiting rings corresponding to the hanging rings, and the limiting rings and the corresponding hanging rings are positioned on the same vertical line; the vertical stress of the hoisting ring is ensured through the limiting ring, and the extrusion or bending deformation and the unfavorable inclination of the prefabricated part during hoisting are prevented. The multifunctional lifting appliance is of a rectangular frame structure, lifting lugs are arranged at four corners of the top of the multifunctional lifting appliance respectively, and the four lifting lugs are connected with a hook on lifting equipment through lifting slings with the same length respectively; to ensure the balance of the multifunctional spreader. Lifting lugs are respectively arranged at four corners of the top of the multifunctional lifting appliance, two pairs of diagonal lifting lugs are respectively connected through lifting slings with the same length, and the middle points of the lifting slings connecting each pair of diagonal lifting lugs are hung on a hook of lifting equipment; to ensure the balance of the multifunctional spreader. The bottom of the multifunctional lifting appliance is provided with a lifting beam for lifting the prefabricated part, and the lifting beam is provided with a group of lifting holes; selecting different lifting holes to enable the vertical position of a sling of a component connected with the lifting hole to correspond to the position of a lifting ring on the prefabricated component; to accommodate different sizes of prefabricated components. The number of the element slings is four, and the lengths of the four element slings are the same; each component sling is connected with one of the hoisting rings on the prefabricated component; so as to ensure the balance of the prefabricated parts during hoisting.
In the integral hoisting method of the prefabricated part, the method comprises the following steps: preparing for hoisting → connecting a multifunctional hoisting tool → selecting a hoisting hole site → moving hoisting equipment to the position right above a prefabricated part → connecting the prefabricated part → checking the verticality and reliability of a sling of the prefabricated part → rechecking the balance of the prefabricated part → transferring the prefabricated part → placing the prefabricated part → dismantling the hoisting tool and the hoisting equipment; the method comprises the following specific steps:
preparing a multifunctional lifting appliance, a lifting sling, a component sling and tools for lifting; and moving the hoisting equipment to the site;
connecting the hoisting sling with lifting lugs at four corners of the top of the multifunctional lifting appliance, and hanging the hoisting sling on a hook of hoisting equipment; pre-hoisting the multifunctional lifting appliance to ensure that the multifunctional lifting appliance is in a balanced state;
measuring the distance between the hanging rings on the prefabricated part and the distance between the hanging rings and the top end of the prefabricated part by using a measuring tape, selecting the positions of hanging holes to be connected on the hanging beam according to the distance between the hanging rings, and selecting the length of a sling of the prefabricated part according to the distance between the hanging rings and the top end of the prefabricated part;
connecting one ends of the four component slings with selected lifting holes on a lifting beam at the bottom of the multifunctional lifting appliance, naturally allowing the other ends of the four component slings to droop, and moving the lifting equipment to enable the vertical lines of the four component slings to correspond to the positions of lifting rings on the prefabricated components;
fifthly, the other ends of the slings of the four components penetrate through a limiting ring on the prefabricated component and are connected with a hanging ring on the prefabricated component;
step six, controlling the hoisting equipment to slowly and stably rise, pausing when the slings of the four components are just in a stretched and tensioned state, and confirming whether the verticality of the slings of the components meets the requirement by means of a triangular ruler; if the connection is reliable, the next step is carried out after the connection is confirmed to be correct;
step seven, when the hoisting equipment is controlled to slowly and stably rise to the height of 30-50cm from the ground to the bottom surface of the prefabricated part, the hoisting equipment is suspended, the balance degree of the prefabricated part is checked, whether the slings of the four parts are vertically tightened and uniformly stressed is confirmed by means of a limiting ring, and the next step is carried out after the situation that no errors exist is confirmed;
step eight, confirming that the target placement points of the prefabricated parts are cleaned, and stably operating the hoisting equipment to transfer the prefabricated parts to the target placement points;
step nine, pausing after the prefabricated part is transferred to a position about 50cm above the target position, slowly descending a steel rope of the hoisting equipment, and placing the prefabricated part in a positioning control line of a target placing point plane;
step ten, after the prefabricated part is checked to be in place, the connection between the sling of the part and the hanging ring is removed, the hoisting equipment is transferred to a safe area, and the multifunctional sling, the hoisting sling and the sling of the part are removed.
The invention is explained in detail by taking the example of hoisting a prefabricated integral toilet. The prefabricated part 1 in this example is a prefabricated integrated toilet. The specific construction process flow comprises the steps of preparing for hoisting → connecting a multifunctional hoisting tool → selecting a hoisting hole site → moving hoisting equipment right above a prefabricated part → connecting the prefabricated part → checking the verticality and reliability of a sling of the prefabricated part → re-checking the balance of the prefabricated part → transferring the prefabricated part → placing the prefabricated part → dismantling the hoisting tool and the hoisting equipment.
When the hoisting preparation is carried out, the hoisting ring 2 and the limiting ring 3 are required to be arranged on the prefabricated part 1. The hanging ring 2 is positioned on the lower side of the prefabricated part 1 and is arranged symmetrically to the gravity center position of the prefabricated part 1. The side surface of the upper part of the prefabricated part 1 is provided with a limiting ring 3, and the limiting ring 3 is positioned on the same vertical line corresponding to the hanging ring 2 so as to keep the member sling 4 in a vertical state during hoisting and prevent extrusion and bending deformation of the prefabricated part 1. The hoisting preparation work further comprises the step of preparing a multifunctional hoisting tool 5, wherein the multifunctional hoisting tool 5 is a rectangular frame with a rigid structure. Lifting lugs 6 are arranged at four corners of the top surface of the multifunctional lifting appliance 5 and are used for connecting lifting slings 7 and are connected with hooks 8 of lifting equipment. In specific implementation, four hoisting slings 7 with the same length can be connected with the hook 8 to ensure the balance of the multifunctional lifting appliance 5 during lifting. Two lifting slings 7 with the same length can also be adopted, a pair of lifting lugs 6 at opposite corners are respectively connected together, and then the center of each lifting sling 7 is hung on a hook 8 of the lifting equipment. The two side edges of the four corners of the bottom surface of the multifunctional lifting appliance 5 are respectively provided with a lifting beam 9, each lifting beam 9 is provided with a group of lifting holes 10, and different lifting holes 10 can be selected to be connected with the prefabricated part 1 through the sling 4 of the component according to the position of the lifting ring 2 on the prefabricated part 1. When the prefabricated part 1 is connected, a proper hoisting hole 10 is selected according to the position of the hoisting ring 2 on the prefabricated part 1. Then one end of the component sling 4 is connected with the lifting hole 10, and the other end of the component sling 4 penetrates through the limiting ring 3 from top to bottom to be connected with the hanging ring 2. The lengths of the slings 4 of the four components are the same so as to ensure that the prefabricated component 1 is in a horizontal state after being lifted.
The concrete hoisting process is as follows:
preparing a multifunctional lifting appliance 5, a lifting sling 7, a component sling 4 and tools for lifting; and moving the hoisting equipment to the site; the used tools comprise a positioning adhesive tape, a measuring tape, a set square, a marking pen, an interphone, a charger and the like which are used for positioning marks in the hoisting process. The hoisting sling 7 and the component sling 4 are soft slings such as high-tensile nylon ropes with the diameter not less than 16 mm. Connecting lifting slings 7 with lifting lugs 6 at four corners of the top of the multifunctional lifting appliance 5, and hanging the lifting slings 7 on a hook 8 of lifting equipment; pre-hoisting the multifunctional lifting appliance 5 to ensure that the multifunctional lifting appliance 5 is in a balanced state; measuring the distance between the hanging rings 2 on the prefabricated part 1 and the distance between the hanging rings 2 and the top end of the prefabricated part 1 by using a measuring tape, selecting the position of a hanging hole 10 to be connected on a hanging beam 9 according to the distance between the hanging rings 2, and selecting the length of a sling 4 of the prefabricated part according to the distance between the hanging rings 2 and the top end of the prefabricated part 1; connecting one end of each of the four component suspension ropes 4 with a selected lifting hole 10 on a lifting beam 9 at the bottom of the multifunctional lifting appliance 5, naturally dropping the other end of each of the four component suspension ropes 4, and moving the hoisting equipment to enable the vertical lines of the four component suspension ropes 4 to correspond to the positions of the lifting rings 2 on the prefabricated component 1; the other ends of the four sling components 4 penetrate through the limiting ring 3 on the prefabricated component 1 and are connected with the hoisting ring 2 on the prefabricated component 1; controlling the hoisting equipment to slowly and stably rise, pausing when the four component slings 4 are just in a stretched, straight and tensioned state, and confirming whether the perpendicularity of the component slings 4 meets the requirements or not by means of a triangular ruler; if the connection is reliable, the next step is carried out after the connection is confirmed to be correct; when the hoisting equipment is controlled to slowly and stably rise to the height of 30-50cm from the ground to the bottom surface of the prefabricated part 1, the hoisting equipment is suspended, the balance degree of the prefabricated part 1 is checked, whether the four sling 4 members are vertically tightened and uniformly stressed is confirmed by means of the limiting ring 3, and the next step is carried out after the situation that no mistake exists is confirmed; confirming that the target placement point of the prefabricated part 1 is completely cleaned, and stably operating the hoisting equipment to transfer the prefabricated part 1 to the target placement point; pausing after the prefabricated part 1 is transferred to a position about 50cm above a target position, slowly descending a steel rope of hoisting equipment, and placing the prefabricated part 1 in a positioning control line of a target placing point plane; and after the prefabricated part 1 is checked to be in place, the connection between the part sling 4 and the hanging ring 2 is removed, the hoisting equipment is transferred to a safe area, and the multifunctional sling 5, the hoisting sling 7 and the part sling 4 are removed, so that the construction is finished.
The whole construction process of the embodiment strictly complies with JGJ59-2011 building construction safety inspection standard, and the hoisting construction is suspended in due time when the wind power exceeds 5 levels or under the weather conditions of rain, snow, frost, fog and the like; the quality control is accepted according to JGJ1-2014 technical Specification of prefabricated concrete structures.
The method has the advantages of high construction efficiency, green and environment-friendly construction process, material conservation and the like, has important significance for promoting the environment-friendly society of China, and is a building form with great development potential. The hoisting and transferring of the prefabricated parts are one of key processes in the assembly type building, and the construction progress of the assembly type building is severely restricted by the precision quality and the efficiency of the hoisting process, so that a simple, safe and efficient hoisting construction method is provided, the construction quality and the construction progress of the assembly type building are greatly improved, and the method has great significance for the development of the assembly type building industry.
Claims (7)
1. The integral hoisting method of the assembly type prefabricated part is characterized by comprising the following steps of: when the prefabricated part is assembled, a hoisting ring for hoisting and a limiting ring for limiting the inclination of the prefabricated part are arranged on the prefabricated part; when in hoisting, a multifunctional hoisting tool is adopted for hoisting; a lifting lug for connecting hoisting equipment is arranged at the top of the multifunctional lifting appliance and is connected with a hook on the hoisting equipment through a hoisting sling; the bottom of the multifunctional lifting appliance is provided with a lifting beam for lifting the prefabricated part, the lifting beam is provided with a lifting hole, and the lifting hole is connected with one end of a sling of the part; the other end of the sling of the component penetrates through the limiting ring to be connected with a hanging ring on the prefabricated component.
2. The method for integrally hoisting the prefabricated units according to claim 1, wherein: the prefabricated part is provided with four hanging rings symmetrical to the gravity center of the prefabricated part, a limiting ring corresponding to the position of each hanging ring is arranged above each hanging ring on the prefabricated part, and the limiting rings and the corresponding hanging rings are positioned on the same vertical line; the vertical stress of the hoisting ring is ensured through the limiting ring, and the extrusion or bending deformation and the unfavorable inclination of the prefabricated part during hoisting are prevented.
3. The method for integrally hoisting the prefabricated units according to claim 1, wherein: the multifunctional lifting appliance is of a rectangular frame structure, lifting lugs are arranged at four corners of the top of the multifunctional lifting appliance respectively, and the four lifting lugs are connected with a hook on lifting equipment through lifting slings with the same length respectively; to ensure the balance of the multifunctional spreader.
4. The method for integrally hoisting the prefabricated units according to claim 1, wherein: lifting lugs are respectively arranged at four corners of the top of the multifunctional lifting appliance, two pairs of diagonal lifting lugs are respectively connected through lifting slings with the same length, and the middle points of the lifting slings connecting each pair of diagonal lifting lugs are hung on a hook of lifting equipment; to ensure the balance of the multifunctional spreader.
5. The method for integrally hoisting the prefabricated units according to claim 1, wherein: the bottom of the multifunctional lifting appliance is provided with a lifting beam for lifting the prefabricated part, and the lifting beam is provided with a group of lifting holes; selecting different lifting holes to enable the vertical position of a sling of a component connected with the lifting hole to correspond to the position of a lifting ring on the prefabricated component; to accommodate different sizes of prefabricated components.
6. The method for integrally hoisting the prefabricated units according to claim 1, wherein: the number of the component slings is four, and the lengths of the four component slings are the same; each component sling is connected with one of the hoisting rings on the prefabricated component; so as to ensure the balance of the prefabricated parts during hoisting.
7. The integral hoisting method for the prefabricated parts according to any one of claims 1 to 6, wherein the method comprises the following steps: the method comprises the following steps: preparing for hoisting → connecting a multifunctional hoisting tool → selecting a hoisting hole site → moving hoisting equipment to the position right above a prefabricated part → connecting the prefabricated part → checking the verticality and reliability of a sling of the prefabricated part → rechecking the balance of the prefabricated part → transferring the prefabricated part → placing the prefabricated part → dismantling the hoisting tool and the hoisting equipment; the method comprises the following specific steps:
preparing a multifunctional lifting appliance, a lifting sling, a component sling and tools for lifting; and moving the hoisting equipment to the site;
connecting the hoisting sling with lifting lugs at four corners of the top of the multifunctional lifting appliance, and hanging the hoisting sling on a hook of hoisting equipment; pre-hoisting the multifunctional lifting appliance to ensure that the multifunctional lifting appliance is in a balanced state;
measuring the distance between the hanging rings on the prefabricated part and the distance between the hanging rings and the top end of the prefabricated part by using a measuring tape, selecting the positions of hanging holes to be connected on the hanging beam according to the distance between the hanging rings, and selecting the length of a sling of the prefabricated part according to the distance between the hanging rings and the top end of the prefabricated part;
connecting one ends of the four component slings with selected lifting holes on a lifting beam at the bottom of the multifunctional lifting appliance, naturally allowing the other ends of the four component slings to droop, and moving the hoisting equipment to enable the vertical lines of the four component slings to correspond to the positions of lifting rings on the prefabricated components;
fifthly, the other ends of the slings of the four components penetrate through a limiting ring on the prefabricated component and are connected with a hanging ring on the prefabricated component;
step six, controlling the hoisting equipment to slowly and stably rise, pausing when the slings of the four components are just in a stretched and tensioned state, and confirming whether the verticality of the slings of the components meets the requirement by means of a triangular ruler; if the connection is reliable, the next step is carried out after the connection is confirmed to be correct;
step seven, when the hoisting equipment is controlled to slowly and stably rise to the height of 30-50cm from the ground to the bottom surface of the prefabricated part, the hoisting equipment is suspended, the balance degree of the prefabricated part is checked, whether the slings of the four parts are vertically tightened and uniformly stressed is confirmed by means of a limiting ring, and the next step is carried out after the situation that no errors exist is confirmed;
step eight, confirming that the target placement points of the prefabricated parts are cleaned, and stably operating the hoisting equipment to transfer the prefabricated parts to the target placement points;
step nine, pausing after the prefabricated part is transferred to a position about 50cm above the target position, slowly descending a steel rope of the hoisting equipment, and placing the prefabricated part in a positioning control line of a target placing point plane;
step ten, after the prefabricated part is checked to be in place, the connection between the sling of the part and the hanging ring is removed, the hoisting equipment is transferred to a safe area, and the multifunctional sling, the hoisting sling and the sling of the part are removed.
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Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
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CN112875512A (en) * | 2021-04-01 | 2021-06-01 | 中国人民解放军63926部队 | Self-adaptive adjusting device and method for hoisting wind load |
CN113863312A (en) * | 2021-10-20 | 2021-12-31 | 中交一航局第五工程有限公司 | Rapid underwater gabion installation method |
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CN112875512A (en) * | 2021-04-01 | 2021-06-01 | 中国人民解放军63926部队 | Self-adaptive adjusting device and method for hoisting wind load |
CN113863312A (en) * | 2021-10-20 | 2021-12-31 | 中交一航局第五工程有限公司 | Rapid underwater gabion installation method |
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Application publication date: 20200417 |