CN109610835B - Construction method of high-altitude large-span heavy-load tool type formwork support steel platform - Google Patents
Construction method of high-altitude large-span heavy-load tool type formwork support steel platform Download PDFInfo
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Abstract
The invention provides an application and a construction method of a high-altitude large-span heavy-load tool type template support steel platform, which can be used for construction platforms of top layers of high-altitude large-span building structures, air conjoined structures and high-altitude large-span structures, and the construction method comprises the following steps: the intelligent high-altitude large-span heavy-load tool type formwork support steel platform is designed and constructed, intelligent lifting machinery is installed on the main body structure temporary supporting points and is fixedly connected, pre-pressure load test and detection verification are conducted on the ground, the intelligent control high-altitude large-span heavy-load tool type formwork support steel platform is automatically and integrally lifted synchronously, the top layer of the high-altitude large-span heavy-load concrete main body structure is constructed and monitored, the principle is scientific, the method is intelligent, the technology is advanced, safety and reliability are achieved, the process is simple and convenient, the construction period is shortened, the cost is reduced, and the labor intensity is reduced. And the intelligent monitoring system is combined to realize the active safety of the main horizontal structure construction process.
Description
Technical Field
The invention relates to the technical field of civil construction, in particular to application of a high-altitude large-span heavy-load tool type formwork support steel platform and a construction method thereof.
Background
Modern buildings are increasingly high in height, span and load. The organization and management difficulty and the operation risk of the construction technology are increasing. The construction difficulty of the high-altitude large-span heavy-load concrete structure is often beyond the range of the competence of the common and traditional construction method.
Along with the development of economic society and the continuous progress of building technology, the number of urban ultrahigh-leading buildings is increased, and due to the scarcity of land resources, the number of high-altitude large-span building structures, air connected structures, high-altitude large-span and large-cantilever structures is increased; the construction difficulty and the risk are also obviously increased, serious accidents such as the whole collapse of the high-altitude template support are frequently caused, and the power plant accidents in Jiangxi Toyobo in 11 and 24 days in 2016 are one typical case.
Traditionally, the high formwork construction mode in China mostly adopts steel pipe frame body formwork. For a large-span heavy-load structure with a large risk exceeding a certain scale, a new construction method must be found under the condition that the bearing capacity and the stability of a fastener type, bowl buckle type, disc buckle type and other support frame bodies can not meet the template support requirements of the special structure through analysis and calculation, and meanwhile, the construction requirements of simple structure, turnover utilization, simple process, economy, safety, reliability, rapidness, convenience and the like are met.
The main structure of the high-altitude large-span concrete has the characteristics of high ground clearance, large span, great weight, large construction load and the like, so that the traditional common high formwork supporting mode of full floor type is adopted for construction, a steel pipe scaffold with huge volume needs to be erected, the condition of quality reduction of high-altitude operation compared with ground operation exists, a large-volume support frame body has multiple manual fastening nodes, multiple loose nodes, multiple hidden dangers, difficulty in inspection and detection, long construction operation period, high labor intensity, high engineering cost, large occupied space for construction, difficulty in construction safety guarantee and the like. Therefore, the defects of the existing construction method are overcome, and a new method for constructing a high-altitude large-span heavy-load concrete structure is necessary.
The Bailey truss, also called Bailey sheet, Bailey beam and Bailey truss, is a steel bridge designed by England engineers for the first military during the second war, and is widely applied in the civil field because the Bailey truss has the characteristics of large bearing capacity, strong rigidity, long fatigue life cycle and the like. Particularly, the method is widely applied to road and bridge engineering. The Jiangsu researches the application of the steel tube bailey truss support structure in the urban high frame, and summarizes the construction method of the steel tube bailey truss support structure foundation; the stress characteristics of a single-layer Bailey truss supporting system with different numbers of supporting points in the span of a large-span bridge are researched by the Liao cuff rule, and the optimal stress is found when two supporting points in the span are spaced by 12 m. In recent years, the application of bailey truss structures to large-span building structures has become widespread. The application of the bailey frame on a formwork supporting platform of a high clearance structure between certain double towers is studied; the application of the Bailey truss sliding support sliding system to the building project of the river airport traffic center is researched in Jiang Yun and the like; the Bailey erection technology of the Hangzhou east station house main line bridge construction platform is discussed by the ordinary waves and the like; a national high-thrust carrier rocket full-rocket vibration tower with the height of 89m introduces a method for supporting a stand column and a platform in bridge engineering, and provides reference for related engineering.
Disclosure of Invention
The invention aims to solve the technical problem of providing the application and the construction method of the high-altitude large-span heavy-load tool type template support steel platform, the process is simple and convenient, the construction period is shortened, the cost is reduced, the labor intensity is reduced, the safety and the reliability are realized, and meanwhile, the automatic deviation correction balance, the synchronous lifting and the descending of the tool type template support steel platform are realized by combining an intelligent control system and an intelligent monitoring system.
In order to solve the problem of high-altitude construction of a large-span heavy-load concrete structure, the embodiment of the invention provides an application of a high-altitude large-span heavy-load tool type formwork support steel platform, which is used for a formwork support frame body aerial construction platform of a high-altitude large-span heavy-load building structure and an aerial conjoined structure.
The invention also provides a construction method of the high-altitude large-span heavy-load tool type formwork support steel platform, which comprises the following steps:
step 1: working condition loads and combined effects thereof in the construction of the high-altitude large-span main body structure are calculated and determined, the construction working conditions are modeled, calculated and analyzed integrally, the stress state, rigidity and deformation analysis under each working condition of the construction of the main body vertical structure are rechecked, the original structure is reinforced if necessary, and a technical checking order is processed;
step 2: designing and determining the structural form of a high-altitude large-span heavy-load tool type template support steel platform;
and 3, step 3: the high-altitude large-span heavy-load tool type template support steel platform structure is selected, a tool type steel truss assembling mode and adaptive reinforcement processing and structural arrangement are adopted, and the requirements on strength, rigidity and stability are met;
and 4, step 4: integrally assembling a tool type template supporting steel platform and a template supporting frame on the ground;
and 5, step 5: arranging a safety protection system and an emergency escape channel of the tool type formwork support steel platform;
and 6, step 6: arranging a tool type steel structure truss and a template support frame safety monitoring device;
and 7, step 7: according to the tool type steel truss supporting requirement and the working requirement of the intelligent lifting machine, designing an additional node structure for temporary supporting;
and 8, step 8: the platform which is additionally arranged on the vertical structure of the main body and the temporary supporting condition required by the installation of the intelligent lifting machine are rechecked, supplemented, designed, manufactured and arranged;
step 9: constructing the main vertical structure to a preset elevation in advance, and checking and rechecking the temporary supporting condition again;
step 10: an intelligent lifting machine, a tool and a connecting fixture are arranged on the temporary support of the main body vertical structure;
and 11, step 11: the setting platform integrally promotes networking and debugging of the intelligent control system and the intelligent safety monitoring system;
step 12: carrying out load prepressing test, detection, acceptance inspection and monitoring on the tool type steel structure truss and the template support frame on the ground;
step 13: according to the ground load prepressing test detection result, checking the deflection deformation calculation parameters of the tool type template support steel platform, accurately reserving the inverted arch numerical value required by the main body horizontal structure, eliminating excessive deformation, and ensuring that the geometric dimension and position of the main body structure meet the design requirements;
step 14: starting the integral intelligent control and synchronous lifting of the tool type template support steel platform in intelligent control;
step 15: the tool type formwork support steel platform is used for constructing a high-altitude large-span heavy-load concrete main structure roof layer, and intelligent safety monitoring, monitoring and early warning are synchronously implemented in the construction process;
step 16: after the construction of the main horizontal structure is completed, concrete curing is carried out until the design form removal condition is met, the adjustable supports are loosened, the tool type formwork support steel platform is descended to the ground by using an intelligent control system, disassembly is carried out, and then a temporary support on the main structure is disassembled;
step 17: and (4) cleaning and maintaining the high-altitude large-span heavy-load tool type formwork support steel platform so as to be used for next similar building construction. Wherein, the 15 th' step between the 15 th step and the 16 th step is also included: the tool type formwork support steel platform is used as a subsequent construction equipment installation project and indoor and outdoor decoration project construction platform, and other high-altitude construction operations can be completed by using the platform.
And in the 8 th step, the tool type template on the vertical main body structure supports the temporary supporting condition required by the installation of the steel platform and the intelligent lifting machine, the supporting condition of the steel platform is a concrete structure or a steel structure bracket, the steel platform is embedded in the vertical structures of the main bodies on two sides, and the steel platform can be disassembled in the future.
Wherein, in the step 9, the vertical main body structure is firstly constructed to a preset elevation by adopting rapid construction processes such as 'slip form' and the like;
and in the step 10, the temporary support of the main body structure adopts a bracket structure and is arranged at the corresponding position on the inner side of the main body vertical structure constructed in the step 9.
Furthermore, the bracket is of a concrete structure or a steel structure embedded on the vertical structures of the main bodies on the two sides.
Wherein, instrument formula template support steel platform in the 4 th step can adopt the bailey frame structure bearing that can have enough to meet the need, include the bailey frame girder that constitutes by horizontal single-row individual layer bailey frame and the multirow individual layer bailey frame of striding the arrangement, locate the support secondary beam of bailey frame girder top, single-row individual layer bailey frame and the crisscross setting of multirow individual layer bailey frame, the both ends of bailey frame girder rest on the bracket of both sides main part vertical structure inboard, support the secondary beam including laying many I-steel or C shaped steel in bailey frame girder top, still include the multiply wood or the decorative pattern steel board of full laying on the shaped steel, form even atress conversion structure.
Further, a formwork support frame is arranged on the support secondary beam and adopts a systematic disc buckling type steel pipe support frame.
Wherein, be equipped with a plurality of logical grooves along longitudinal interval on the bracket for bailey frame girder passes through during whole lifting.
Wherein, in step 10 the intelligent hoisting machinery comprises: the hydraulic jack is composed of high-pressure metering oil pump, high-strength steel strand for lifting, anchor and locking clamp, stroke meter and stroke switch.
Wherein, in step 11 the platform integrally promotes intelligent control system includes: the portable computer, the on-line data analysis intelligent early warning system, the synchronous lifting special program software with automatic deviation rectifying function, the horizontal position state signal sensor, the stress and deformation signal sensor, the multi-channel signal converting processor, the data signal line or the short-range communication wireless signal link. The platform integral lifting intelligent control system enables lifting operation control personnel to work on the ground without working in a high-altitude dangerous environment. In the safety monitoring system, safety monitoring personnel can also work on the ground by means of a short-range communication wireless signal link.
Checking the deflection deformation of the tool type template support steel platform according to the detection result of the load pre-pressing test in the step 13 means that the reverse deformation required by the main body horizontal structure is accurately reserved through calculation parameter adjustment, the defect influence of large deformation and excessive deformation of the bailey truss is eliminated, and the geometric dimension and the position of the main body structure are ensured to meet the design requirements;
and step 15, carrying out overall process intelligent monitoring and early warning on key parts of the high formwork system by adopting an online data analysis intelligent early warning system and using a high-precision instrument monitoring method. The construction loading direction and sequence are divided by considering the arrangement mode of the primary and secondary Bailey beams, the stability control of the high formwork system is favorably realized, and the real-time dynamic safety guarantee is realized by the safety monitoring of the whole process, the checking and the correction of the design calculation of the high formwork system;
wherein, the 10 th step: the temporary support on the main structure can be used as a next layer of horizontal structure to be connected with the vertical structure, and if the temporary support is of a single-layer structure, bracket concrete is chiseled laterally or brackets are disassembled, and the temporary support is restored to the original design;
the technical scheme of the invention has the following beneficial effects:
1. the construction method has the advantages that the technical idea is advanced, the main vertical structure is quickly constructed in advance, the main horizontal structure is constructed in a post-pouring mode, the temporary support bracket is supported on the vertical structure and can be integrally poured, the temporary support bracket is chiseled off after being used, most of construction operations of dangerous projects are finished on the ground, the risks of high-altitude large-span high formwork construction operation are effectively reduced, and the construction method is safe, reliable and simple in structure.
2. The tool type template support steel platform can give consideration to the main structure construction, decoration and fitment engineering and equipment installation engineering construction operation, can be repeatedly used in other similar engineering, can effectively shorten the construction period, reduce the engineering cost and lighten the labor intensity, utilizes the computer-controlled intelligent lifting system to combine with the online data analysis intelligent early warning system, monitors in real time and intelligently early warns, automatically and synchronously lifts and descends in the whole process, automatically corrects the deviation and reduces the risk of misoperation of personnel.
3. The invention converts a large amount of high-altitude large-span heavy-duty formwork support system construction work with large aerial danger into ground pre-assembly work, realizes that necessary steps such as platform ground integral installation, prepressing, detection, acceptance inspection, monitoring parameter optimization and the like are carried out on the ground, furthest reduces the safety risk, overcomes the defect of poor safety and reliability of the traditional floor type high and large formwork construction method, and can be used as a construction platform for later-stage construction equipment installation engineering and indoor and outdoor decoration engineering due to the universality and good safety of the aerial construction platform, and also furthest reduces the construction unit cost and expense.
Drawings
FIG. 1 is a schematic structural diagram according to a first embodiment of the present invention;
FIG. 2 is a first schematic view illustrating a first usage state according to a first embodiment of the present invention;
FIG. 3 is a schematic view illustrating a second usage state according to a first embodiment of the present invention;
fig. 4 is an enlarged view of a partial top view of the first embodiment of the present invention.
Description of reference numerals:
1. a single row single layer reinforced bailey frame; 2. four rows of single-layer reinforced bailey frames; 3. a bracket; 4. supporting the secondary beam; 5. the dish knot formula steel pipe support frame.
Detailed Description
In order to make the technical problems, technical solutions and advantages of the present invention more apparent, the following detailed description is given with reference to the accompanying drawings and specific embodiments.
The invention provides an application of a tool type template support steel platform of an overhead large-span heavy-load structure, which is used for a construction platform at the top layer of an overhead large-span building structure, an overhead conjoined structure, an overhead large-span and a large cantilever structure, converts a large amount of construction operations with large aerial dangerousness into pre-assembly operations on the ground, realizes the integral installation of the platform on the ground, performs the necessary steps of pre-pressing, detection, acceptance inspection, monitoring parameter optimization and the like on the ground, furthest reduces the safety risk, overcomes the defect of poor safety and reliability of the traditional floor type high and large formwork construction method, has good universality and safety, can be used as a construction platform of later equipment installation engineering and indoor decoration engineering, and also furthest reduces the cost and expense of construction units.
The invention also provides a construction method of the high-altitude large-span heavy-load tool type formwork support steel platform, which comprises the following steps:
step 1: working condition loads and combined effects thereof in the construction of the high-altitude large-span main body structure are calculated and determined, the construction working conditions are modeled, calculated and analyzed integrally, the stress state, rigidity and deformation analysis under each working condition of the construction of the main body vertical structure are rechecked, the original structure is reinforced if necessary, and a technical checking order is processed;
step 2: designing and determining the structural form of a high-altitude large-span heavy-duty tool type (Bailey frames and the like) template support steel platform;
and 3, step 3: the high-altitude large-span heavy-duty tool type (Bailey frames and the like) template support steel platform structure is selected, and the tool type steel truss is assembled in a mode and a structural arrangement, so that the requirements on strength, rigidity and stability are met;
and 4, step 4: integrally assembling a tool type template supporting steel platform and a template supporting frame on the ground;
the tool type template supporting steel platform adopts a turnover Bailey truss structure for bearing, comprises a Bailey truss main beam and a supporting secondary beam, wherein the Bailey truss main beam consists of a single-row single-layer Bailey truss and a multi-row single-layer Bailey truss which are transversely arranged in a cross mode, the supporting secondary beam is arranged above the Bailey truss main beam, the single-row single-layer Bailey truss and the multi-row single-layer Bailey truss are arranged in a staggered mode, two ends of the Bailey truss main beam are placed on and welded on brackets on the inner sides of vertical structures of main bodies on two sides, the supporting secondary beam comprises a plurality of I-shaped steels or C-shaped steels arranged above the Bailey truss main beam, and the supporting secondary beam further comprises a multi-.
And a formwork support frame is arranged on the support secondary beam and adopts a systematized disk buckling type steel pipe support frame.
And 5, step 5: arranging a safety protection system and an emergency escape channel of the tool type formwork support steel platform;
and 6, step 6: arranging a tool type steel structure truss and a template support frame intelligent safety monitoring device;
and 7, step 7: according to the tool type steel truss supporting requirement and the working requirement of the intelligent lifting machine, designing an additional node structure for temporary supporting;
and 8, step 8: the platform which is additionally arranged on the vertical structure of the main body and the temporary supporting condition required by the installation of the lifting machine are rechecked, supplemented, designed, manufactured and arranged;
step 9: constructing the main vertical structure to a preset elevation in advance, and checking and rechecking the temporary supporting condition again;
step 10: an intelligent lifting machine, a tool and a connecting fixture are arranged on a temporary support of the main body structure;
the temporary support of the main structure adopts a bracket structure, is arranged at the corresponding position on the inner side of the main vertical structure constructed in the step 9 and is generally the position of the lower layer of the roof layer of the high-altitude large-span concrete main structure.
The bracket is a concrete structure or a steel structure embedded on the vertical structures of the main bodies on the two sides, in the embodiment, the bracket is preferably arranged on the concrete structures on the vertical structures of the main bodies on the two sides, and the concrete bracket is cut off after the steel platform is detached, so that the flatness of the side surface of the vertical structure of the main body is easily ensured. The bracket is provided with a plurality of through grooves at intervals in the longitudinal direction, and the bailey truss girder is used for lifting the bracket from the lower side to the upper side of the bracket during integral lifting.
And in the 8 th step and the 10 th step, the tool type template on the vertical main body structure supports the temporary support required by the installation of the steel platform and the intelligent lifting machine, the steel platform is supported by a concrete structure or a steel structure bracket and is embedded in the vertical structures of the main bodies on two sides, and the steel platform can be disassembled in the future.
Wherein, in the step 9, the vertical main body structure is firstly constructed to a preset elevation by adopting rapid construction processes such as 'slip form' and the like;
the intelligent lifting machinery comprises a straight-through oil jack, a program-controlled multi-path motor-driven high-pressure metering oil pump, a high-strength steel strand for lifting, an anchor device, a locking clamp, a stroke metering instrument and a stroke switch.
And 11, step 11: the setting platform integrally promotes networking and debugging of the intelligent control system and the intelligent safety monitoring system;
wherein, the platform is whole to promote intelligent control system includes: the portable computer, the on-line data analysis intelligent early warning system, the synchronous lifting special program software with automatic deviation rectifying function, the horizontal position state signal sensor, the stress and deformation signal sensor, the multi-channel signal converting processor, the data signal line or the short-range communication wireless signal link.
Step 12: carrying out load pre-pressing test and detection on the tool type steel structure truss and the template support frame on the ground;
step 13: according to the load prepressing test detection result, checking the deflection deformation calculation parameters of the tool type template support steel platform, accurately reserving the inverted arch value required by the main body horizontal structure, eliminating excessive deformation, and ensuring that the geometric dimension and position of the main body structure meet the design requirements;
step 14: starting the integral intelligent control and synchronous lifting of the tool type template support steel platform which is intelligently controlled, and placing and fixing the temporary support point to a preset elevation;
step 15: the tool type formwork support steel platform is used for carrying out high-altitude large-span heavy-load concrete main body horizontal structure layer construction, and intelligent safety monitoring, monitoring and early warning are synchronously implemented in the construction process;
step 16: after the construction of the main horizontal structure is completed, concrete curing is carried out until the design form removal condition is met, the adjustable supports are loosened, the tool type formwork support steel platform is integrally descended to the ground by using an intelligent control system, disassembly is carried out, and then a temporary support on the main structure is disassembled;
step 17: and (4) cleaning and maintaining the high-altitude large-span heavy-load tool type formwork support steel platform so as to be used for next similar building construction.
The construction method of the high-altitude large-span heavy-load tool type formwork support steel platform further comprises a 15' step between the 15 th step and the 16 th step: and (3) utilizing the tool type template support steel platform to serve as a subsequent equipment installation project and indoor decoration project construction platform to finish other high-altitude construction operations. Meaning that: after the roof layer of the high-altitude large-span concrete main body structure is poured, the steel platform can be not detached firstly, the steel platform can be still used as a construction platform for construction workers to stand when the roof layer is decorated and matched facilities are installed, construction safety is guaranteed, and the steel platform can be detached after the roof layer is decorated and matched facilities are installed.
The technical scheme of the invention is specifically described below by taking a certain theater building project as an example.
1. Example engineering overview
A theater project comprises five major entities, a opera house, a concert hall, a theater, a multi-functional hall and a children's theater, a juvenile event center.
The basic aspects of the present architectural design are as follows:
2. general overview of high-altitude formwork support platform design
2.1 overview of the tall and big formwork region
The high and large formwork support system means that the support height of a concrete member formwork on a construction site of a construction project exceeds 8m, or the erection span exceeds 18m, or the total construction load is more than 15KN/m2Or a template support system with a concentrated load greater than 20 KN/m. The scheme adopts professional software to perform modeling analysis calculation.
2.2 Risk analysis determination of tall formwork areas
The area of a high formwork supporting area of a certain theater project is large, the variety is multiple, and the formwork system is erected by selecting a full-scale red steel pipe fastener formwork system. DishThe button type steel pipe bracket is used in a high formwork supporting area. According to the regulations such as project safety management regulations of partial projects with large dangerousness, the height is set to be 8m or more, the span is set to be 18m or more, and the total construction load is 15kN/m2And the template engineering and the supporting system with the load of more than 20kN/m of a concentrated line belong to the project range of partial projects with larger dangerousness exceeding a certain scale, and all the projects need to specially compile a safety special construction scheme and organize experts to demonstrate the special scheme.
3. Taking a certain large theater as an example, the invention is adopted to pour the 6 th layer of top cover of the opera house, the structure of the thunderbridge of the opera house is shown in figure 1, 321 steel bridge truss joints are adopted, and the thunderbridge main beam is erected to bear the load of the top beam plate of the sixth layer. The longitudinal Bailey truss main beam is placed on the concrete corbel 3 at the wall, 16-number I-beams (Q235) are laid on the Bailey truss as supporting secondary beams 4, and the I-beams are fully distributed with the coiling buckle type supporting frames 5 to form a supporting system of the top beam plate of the main stage.
The transverse 19.2 m-span single-row single-layer reinforced Bailey frames 1 and the three-row single-layer reinforced Bailey frames 2 are used as main beams, the arrangement distance of the Bailey frames is 1350mm, the Bailey frames are placed on the concrete brackets 3 at the two ends, and the assembly length of each Bailey beam is 21 m. Wherein, 3 rows of single-layer reinforced Bailey beams with 9 trusses are arranged right below the main beams with the size of 400mm multiplied by 1400mm, and the rest positions are single-row single-layer reinforced Bailey beams with 10 trusses. The total number of the 3m standard Bailey sheets (reinforced type) is 280 sheets.
And a concrete bracket is added on the shear wall to serve as a Bailey beam support.
The invention has the advantages of advanced technical idea and scientific principle, the main vertical structure is quickly constructed in advance, the construction operation of most dangerous projects is completed on the ground jig frame, the risk of high-altitude, large-span and high-formwork construction operation is effectively reduced, and the invention is safe, reliable and simple in structure. The tool type template supporting steel platform can be repeatedly used, the construction period can be effectively shortened, the engineering cost is reduced, the labor intensity is reduced, the intelligent lifting system controlled by the computer is combined with the intelligent safety monitoring system, the whole process is automatically lifted and descended to operate, the automatic deviation correction is realized, the intelligent early warning is realized, the emergency locking is realized, and the risk of misoperation of personnel is reduced.
While the foregoing is directed to the preferred embodiment of the present invention, it will be understood by those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the invention as defined in the appended claims.
Claims (8)
1. A construction method of a high-altitude large-span heavy-load tool type formwork support steel platform is characterized in that the high-altitude large-span heavy-load tool type formwork support steel platform is used for a formwork support frame body aerial construction platform of a high-altitude large-span heavy-load building structure and an aerial conjoined structure, and the construction method comprises the following steps:
step 1: working condition loads and combined effects thereof in the construction of the high-altitude large-span main body structure are calculated and determined, the construction working conditions are modeled, calculated and analyzed integrally, the stress state, rigidity and deformation analysis under each working condition of the construction of the main body vertical structure are rechecked, the original structure is reinforced if necessary, and a technical checking order is processed;
step 2: designing and determining the structural form of a high-altitude large-span heavy-load tool type template support steel platform;
and 3, step 3: the high-altitude large-span heavy-load tool type template support steel platform structure is selected, a tool type steel truss assembling mode and adaptive reinforcement processing and structural arrangement are adopted, and the requirements on strength, rigidity and stability are met;
and 4, step 4: integrally assembling a tool type template supporting steel platform and a template supporting frame on the ground;
and 5, step 5: arranging a safety protection system and an emergency escape channel of the tool type formwork support steel platform;
and 6, step 6: arranging a tool type steel structure truss and a template support frame safety monitoring device;
and 7, step 7: according to the tool type steel truss supporting requirement and the working requirement of the intelligent lifting machine, designing an additional node structure for temporary supporting;
and 8, step 8: the platform which is additionally arranged on the vertical structure of the main body and the temporary supporting condition required by the installation of the lifting machine are rechecked, supplemented, designed, manufactured and arranged;
step 9: constructing the main vertical structure to a preset elevation in advance, and checking and rechecking the temporary supporting condition again;
step 10: an intelligent lifting machine, a tool and a connecting fixture are arranged on the temporary support of the main body vertical structure;
and 11, step 11: the setting platform integrally promotes networking and debugging of the intelligent control system and the intelligent safety monitoring system;
step 12: carrying out load prepressing test, detection, acceptance inspection and monitoring on the tool type steel structure truss and the template support frame on the ground;
step 13: according to the ground load prepressing test, detection and monitoring results, checking the deflection deformation calculation parameters of the tool type template support steel platform, accurately reserving reverse deformation for the inverted arch value required by the main body horizontal structure, eliminating excessive deformation and ensuring that the geometric dimension and position of the main body structure meet the design requirements;
step 14: starting the integral intelligent control and synchronous lifting of the tool type template support steel platform which is intelligently controlled, and placing and fixing the temporary support point to a preset elevation;
step 15: the tool type formwork support steel platform is used for carrying out high-altitude large-span heavy-load concrete main body horizontal structure layer construction, and intelligent safety monitoring, monitoring and early warning are synchronously implemented in the construction process;
step 16: after the construction of the main horizontal structure is completed, concrete curing is carried out until the design form removal condition is met, the adjustable supports are loosened, the tool type formwork support steel platform is integrally descended to the ground by using an intelligent control system, disassembly is carried out, and then a temporary support on the main structure is disassembled;
step 17: and (4) cleaning and maintaining the high-altitude large-span heavy-load tool type formwork support steel platform so as to be used for next similar building construction.
2. The construction method of the high-altitude large-span heavy-load tool type formwork support steel platform according to claim 1, further comprising a 15' step between the 15 th step and the 16 th step: and (3) using the tool type formwork support steel platform as a subsequent equipment installation project and indoor decoration project construction platform to finish other high-altitude construction operations.
3. The construction method of the high-altitude large-span heavy-load tool-type formwork support steel platform as claimed in claim 1, wherein in the step 10, the temporary support of the main structure is of a bracket-type structure and is arranged at a corresponding position on the inner side of the main vertical structure constructed in the step 9.
4. The construction method of the high-altitude large-span heavy-load tool-type formwork support steel platform as claimed in claim 3, wherein the corbel is a concrete structure corbel or a steel structure corbel embedded in the vertical structures of the main bodies on two sides.
5. The construction method of the high-altitude large-span heavy-load tool type formwork support steel platform according to claim 1, wherein the tool type formwork support steel platform in the step 4 is supported by a reusable Bailey truss structure, and comprises Bailey truss main beams and support secondary beams, wherein the Bailey truss main beams are composed of single-row single-layer Bailey trusses and multiple-row single-layer Bailey trusses which are transversely arranged in a span-wise manner, the support secondary beams are arranged above the Bailey truss main beams, the single-row single-layer Bailey trusses and the multiple-row single-layer Bailey trusses are arranged in a staggered manner, two ends of the Bailey truss main beams are placed on brackets on the inner sides of the main body vertical structures on two sides, the support secondary beams comprise multiple I-shaped steels or C-shaped steels arranged above the Bailey truss main beams, and further comprise multilayer plates or pattern steel.
6. The construction method of the high-altitude large-span heavy-load tool-type formwork support steel platform as claimed in claim 5, wherein the supporting secondary beam is provided with a formwork support frame, and the formwork support frame can be a systematic disc buckle type support frame.
7. The construction method of the high-altitude large-span heavy-load tool type formwork support steel platform as claimed in claim 3 or 4, wherein a plurality of through grooves are formed in the corbel at intervals along the longitudinal direction.
8. The construction method of the high-altitude large-span heavy-load tool type formwork support steel platform as claimed in claim 1, wherein in the step 10, the intelligent lifting machine comprises: the hydraulic lifting jack is characterized by comprising a straight-through type hydraulic jack, a program-controlled multi-path motor driven high-pressure metering oil pump, a high-strength steel strand for lifting, an anchorage device, a locking clamp, a stroke metering instrument and a stroke switch;
in step 11, the platform integral lifting intelligent control system comprises: the portable computer, the on-line data analysis intelligent early warning system, the synchronous lifting special program software with automatic deviation rectifying and emergency locking functions, a horizontal position state signal sensor, a stress and deformation signal sensor, a multi-channel signal conversion processor, a data signal line or a short-range wireless communication signal link.
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| CN116837739A (en) * | 2023-07-28 | 2023-10-03 | 中国二十冶集团有限公司 | Bailey beam disc buckling frame mixing method suitable for middle-small cast-in-situ box beam |
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| CN103556823B (en) * | 2013-10-28 | 2016-04-13 | 山西二建集团有限公司 | The construction method of lamina tecti form bracing system made by silo sliding formwork operating platform |
| CN104141383B (en) * | 2014-07-16 | 2016-06-01 | 北京万兴建筑集团有限公司 | A kind of Bailey beam pendent form support system and construction thereof |
| CN104831928B (en) * | 2015-05-29 | 2017-01-04 | 常州第一建筑集团有限公司 | High-altitude long-span concrete conjoined structure shuttering supporting steel platform construction method |
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