CN109610834B - High-altitude construction method for multi-layer large-span heavy-load concrete structure - Google Patents
High-altitude construction method for multi-layer large-span heavy-load concrete structure Download PDFInfo
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Abstract
The invention provides a high-altitude construction method of a multi-layer large-span heavy-load concrete structure, which utilizes an intelligent lifting tool type template support steel platform to be combined with an intelligent monitoring system to carry out reverse-order construction on a horizontal structure in a high-altitude large-span heavy-load building structure from top to bottom, and mainly comprises the following steps: the intelligent control type high-altitude large-span heavy-load tool type formwork support steel platform is integrally assembled on the ground, a main body vertical structure is constructed to a preset elevation in advance, a temporary supporting point is arranged on the main body vertical structure, an intelligent lifting machine is installed on the main body structure temporary supporting point and is fixedly connected, after preloading load verification is carried out on the ground, intelligent control is automatically and integrally and synchronously lifted, a main body horizontal structure is constructed in a reverse sequence from top to bottom, the platform is automatically and synchronously descended, and the like. The invention has scientific principle, smart method, advanced technology, safety, reliability, simple and convenient process, shortened construction period, reduced cost and reduced labor intensity. 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 a high-altitude construction method for a multi-layer large-span heavy-load concrete structure.
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 multi-layer large-span heavy-load concrete structure is often beyond the range of the competence of the common and traditional construction method.
With the development of economic society and the continuous progress of building technology, the number of high-rise and super high-rise buildings in cities is increased day by day, and the design of high-altitude large-span building structures, aerial conjoined structures, high-altitude large-span structures and large cantilever structures is increased day by day due to the scarcity of land resources; 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 which has a larger danger height and exceeds a certain scale, through analysis and calculation, the bearing capacity and the stability of a fastener type, a bowl buckle type, a disc buckle type and other support frame bodies cannot meet the template support requirements of the special structure, a new construction method must be found, 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.
Disclosure of Invention
The invention aims to solve the technical problem of providing an overhead construction method for a multi-layer large-span heavy-load concrete structure, which has the advantages of simple and convenient process, construction period shortening, cost reduction, labor intensity reduction, safety and reliability, and realizes the autonomous deviation rectifying balance, synchronous lifting and descending of a tool type template support steel platform by combining an intelligent control system and an intelligent monitoring system.
In order to solve the problem of high-altitude construction of a multi-layer large-span heavy-load concrete structure, the embodiment of the invention provides a high-altitude construction method of the multi-layer large-span heavy-load concrete structure.
The invention also provides a high-altitude construction method of the multi-layer large-span heavy-load concrete structure, which comprises the following steps:
step 1:
calculating and determining working condition loads and combined effects thereof in the construction of the high-altitude large-span heavy-load main body structure, modeling calculation and overall analysis of construction working conditions, rechecking stress state, rigidity and deformation analysis under each working condition of the construction of the main body vertical structure, designing connecting nodes of the horizontal structure and the main body vertical structure after watering, and performing reinforcement treatment on the original structure if necessary;
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 design 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: designing an additional node for temporary support according to the tool type steel truss support requirement and the working requirement of the intelligent lifting machine;
and 8, step 8: the temporary supporting condition rechecking, supplementary design, manufacturing and arrangement required by the installation of the tool type template supporting steel platform and the lifting machine on the vertical main body structure are used for processing a technical checking order, and the temporary supporting condition rechecking, supplementary design, manufacturing and arrangement comprise a temporary supporting bracket and a top temporary operating platform;
step 9: constructing the vertical main 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 tool type template support steel platform;
and 11, step 11: arranging a steel platform integral lifting intelligent control system and an intelligent safety monitoring system for networking and debugging;
step 12: carrying out load prepressing test, detection, acceptance inspection and monitoring on the tool type steel platform and the template support frame on the ground;
step 13: according to the ground load prepressing test, detection and monitoring results, the stress strain of the key part is checked, the safety and deflection deformation calculation parameters of the tool type template support steel platform are checked, the inverted arch value required by the main body horizontal structure is accurately reserved, excessive deformation is eliminated, and the geometric dimension and position of the main body structure are ensured to meet the design requirements;
step 14: the tool type template supporting steel platform which starts intelligent control is integrally and synchronously lifted to a proper position between the Nth layer and the (N-1) th layer, and the tool type template supporting steel platform is laid and fixed;
step 15: the tool type template support steel platform is utilized to carry out high-altitude large-span heavy-load concrete main body horizontal structure roof layer construction, namely the Nth layer construction, a hole needs to be reserved on a floor at the position of a lifting steel strand, N-1 layers of material inlet and outlet parts or a feeding platform needs to be reserved at the same time, and intelligent safety monitoring, monitoring and early warning are carried out in the whole process;
step 16: when N layers of concrete reach a preset formwork removal condition, loosening the adjustable supports, integrally descending the tool type formwork support steel platform to a position between the (N-1) th layer and the (N-2) th layer by using an intelligent control system, carrying out next-layer high-altitude large-span heavy-load concrete main body horizontal structure construction on the (N-1) th layer, and carrying out intelligent safety monitoring, monitoring and early warning in the whole process;
step 17: repeating the 15 th step and the 16 th step to complete the top-down reverse-order construction of the main structure of the high-altitude large-span heavy-load concrete from the (N-1) th layer to the bottommost layer, and intelligently and safely monitoring;
step 18: after the main structure construction is finished, the tool type formwork support steel platform is descended to the ground, disassembly is carried out, and then a temporary support on the main structure is disassembled;
step 19: 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 high-altitude construction method of the multilayer large-span heavy-load concrete structure further comprises the following steps:
15' th step between 15 th step and 16 th step: the tool type formwork support steel platform is used as a subsequent equipment installation project and indoor decoration project construction platform to finish other high-altitude construction work of the Nth layer;
16' th step between 16 th and 17 th steps: and (3) using the tool type template support steel platform as a subsequent equipment building installation project and indoor and outdoor decoration project construction platform to finish other high-altitude construction work from the (N-1) th layer to the bottommost layer.
And the temporary supports of the tool type formwork support steel platforms in the 8 th step and the 10 th step are of concrete structures or steel structure brackets, are embedded on the main body vertical structures on two sides, and can be detached in the future. According to the height of the building layer, the N layers of platform supporting brackets can be arranged at N-1 layers of elevations, and the brackets can be used by an N-1 horizontal structure.
Furthermore, the supporting condition required by the installation of the intelligent lifting machine is a steel corbel structure, and the corresponding position on the inner side of the main vertical structure constructed in the step 9 is arranged.
Wherein, instrument formula template support steel platform in the 4 th step adopts the bailey frame structure bearing that the market stock is big, commonality, turnover rate are high, include the bailey frame girder that single row individual layer bailey frame and the multirow individual layer bailey frame that strides across the arrangement transversely constitutes, 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 are shelved on the bracket of both sides main part vertical structure inboard, support secondary beam is including laying many I-steel or the C shaped steel in bailey frame girder top, still includes the multiply wood or the decorative pattern steel plate of full spreading on the shaped steel, forms even atress transform structure.
Further, a formwork support frame is arranged on the support secondary beam and adopts a systematic disc buckle type 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.
And 9, constructing the vertical main body structure to a preset elevation in advance by adopting a rapid construction process such as 'slip form' and the like.
Wherein, in step 10, the intelligent hoisting machine 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 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. 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.
In the step 13, according to the detection result of the load pre-pressing test, checking the deflection deformation of the tool type template support steel platform means that reverse deformation is accurately reserved through calculation parameter adjustment, large deformation and excessive deformation of the bailey truss are eliminated, and the geometric dimension and the position of a main body structure are ensured to meet the design requirements;
in the step 15, tool type formwork supporting steel platforms are used for conducting high-altitude large-span heavy-load concrete main body horizontal structure layer N construction, holes need to be reserved for lifting the floor at the position of the steel strand, and meanwhile, N-1 layers of material inlet and outlet portions or feeding platforms needed by construction need to be reserved.
Wherein, the whole process safety monitoring and early warning in the steps 15 and 16 refers to the whole process monitoring and early warning of loading on the key parts of the high formwork supporting system by adopting 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;
in the 8 th step, the temporary support on the vertical main body structure can be used as the connection of the next layer of horizontal structure and the vertical structure, and the N layers of platform support corbels can be located at N-1 layers of elevations according to the height of the building layer and can be used by the N-1 horizontal structure. If the structure is a single-layer structure, side chiseling bracket concrete or disassembling the bracket, and rectifying and restoring to the original design.
The technical scheme of the invention has the following beneficial effects:
1. the invention has advanced technical idea, and the main vertical structure is constructed quickly in advance to form larger space rigidity and bearing capacity for utilization. The multilayer horizontal structure top-down reverse construction, the temporary supporting bracket can be used as the next layer of horizontal structure to be connected with the vertical structure, the construction operation of most dangerous large projects is finished on the ground, the high-altitude large-span high formwork construction operation risk is effectively reduced, and the structure is safe, reliable and simple.
2. The tool type formwork support steel platform can give consideration to the construction of a main structure, decoration and fitment engineering and equipment installation engineering, can be repeatedly used in other similar engineering, can effectively shorten the construction period, reduce the engineering cost and lighten the labor intensity, and can be used for automatically and synchronously lifting and operating the whole process, automatically correcting the deviation and reducing the risk of misoperation of personnel by utilizing the computer to control an intelligent lifting system and combining real-time monitoring data.
3. The invention converts a large amount of construction operation with larger aerial danger into integral pre-assembly operation of the ground, realizes that necessary steps such as integral installation, prepressing, acceptance inspection, detection parameter optimization and the like of the platform ground 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, can be used as a construction platform for later-stage construction equipment installation engineering and indoor and outdoor decoration engineering due to good universality and safety of the aerial construction platform, and also furthest reduces the cost and expense of construction units.
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. a plurality of rows of single-layer reinforced bailey frames; 3. a bracket; 4. supporting the secondary beam; 5. a coil buckle type steel pipe support frame; 6. a main body vertical structure; 7. a feed-through jack; 8. high-strength steel strands; 9. a roof layer.
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 overhead construction method for a multilayer large-span heavy-load concrete structure, which utilizes an intelligent lifting tool type template support steel platform to be combined with an intelligent monitoring system, so that the horizontal structure of the multilayer large-span heavy-load concrete structure is constructed from the top to the bottom of the Nth layer in a reverse sequence, the risk of overhead construction operation is reduced, the intelligent safety monitoring is increased, and the autonomous deviation rectifying balance, synchronous lifting and descending of the tool type template support steel platform are realized. The construction operation with large aerial danger is converted into the pre-assembly operation of the ground, necessary steps such as platform ground integral installation, prepressing detection acceptance parameter optimization and the like are realized on the ground, the safety risk is reduced to the maximum extent, the defect of poor safety and reliability of the traditional floor type high and large formwork construction method is overcome, and the aerial construction platform is good in universality and safety, can be used as a construction platform for post equipment installation engineering and indoor decoration engineering, and reduces the construction unit cost and expense to the maximum extent.
The high-altitude construction method of the multi-layer large-span heavy-load concrete structure comprises the following steps:
step 1: calculating and determining working condition loads and combined effects thereof in the construction of the high-altitude large-span heavy-load main body structure, modeling calculation and overall analysis of construction working conditions, rechecking stress state, rigidity and deformation analysis under each working condition of the construction of the main body vertical structure, designing connecting nodes of the horizontal structure and the main body vertical structure after watering, and performing reinforcement treatment on the original structure if necessary;
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-load tool type (Bailey frames and the like) template support steel platform structure is selected, a tool type steel truss assembling mode and adaptive reinforcement design 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;
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-.
The template support frame is arranged on the support secondary beam and adopts a systematization disk buckling type 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 safety monitoring device;
and 7, step 7: designing an additional node for temporary support according to the tool type steel truss support requirement and the working requirement of the intelligent lifting machine;
and 8, step 8: the temporary supporting condition rechecking, supplementary design, manufacturing and arrangement required by the installation of the tool type template supporting steel platform and the lifting machine on the vertical main body structure are used for processing a technical checking order, and the temporary supporting condition rechecking, supplementary design, manufacturing and arrangement comprise a temporary supporting bracket and a top temporary operating platform;
step 9: constructing the main vertical structure 6 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 tool type template support steel platform;
the temporary support of the tool type formwork support steel platform 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 of a concrete structure or a steel structure embedded on the vertical structures of the main bodies on the two sides, the N layers of platform supporting brackets can be arranged at the elevations of the N-1 layers according to the height of the building, and the bracket can be used by the N-1 horizontal structure. In this embodiment, the concrete structure on the both sides main part vertical structure is preferably located to the bracket, demolish the steel platform after with the concrete bracket cut off can, easily guarantee that the side of main part vertical structure is level and smooth. 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.
The intelligent lifting machinery comprises a straight-through oil jack 7, a program-controlled multi-path motor-driven high-pressure metering oil pump, a high-strength steel strand 8 for lifting, an anchorage 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, on-line data analysis intelligent early warning system, synchronous lifting special program software with automatic deviation correcting and emergency locking functions, horizontal position state signal sensor, stress and deformation signal sensor, multi-channel signal conversion processor, data signal line or short-range communication wireless signal link.
Step 12: carrying out load pre-pressing 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, the stress strain of the key part is checked, the safety and deflection deformation calculation parameters of the tool type template support steel platform are checked, the inverted arch value required by the main body horizontal structure is accurately reserved, excessive deformation is eliminated, and the geometric dimension and position of the main body structure are ensured to meet the design requirements;
step 14: the tool type template supporting steel platform which starts intelligent control is integrally and synchronously lifted to a proper position between the Nth layer and the (N-1) th layer, and the tool type template supporting steel platform is laid and fixed;
step 15: the tool type template support steel platform is utilized to carry out high-altitude large-span heavy-load concrete main body horizontal structure roof layer construction, namely the Nth layer construction, a hole needs to be reserved on a floor at the position of a lifting steel strand, N-1 layers of material inlet and outlet parts or a feeding platform needs to be reserved at the same time, and intelligent safety monitoring, monitoring and early warning are carried out in the whole process;
step 16: when N layers of concrete reach a preset formwork removal condition, loosening the adjustable supports, integrally descending the tool type formwork support steel platform to a position between the (N-1) th layer and the (N-2) th layer by using an intelligent control system, carrying out next-layer high-altitude large-span heavy-load concrete main body horizontal structure construction on the (N-1) th layer, and carrying out intelligent safety monitoring, monitoring and early warning in the whole process;
step 17: repeating the 15 th step and the 16 th step to complete the top-down reverse-order construction of the main structure of the high-altitude large-span heavy-load concrete from the (N-1) th layer to the bottommost layer, and intelligently and safely monitoring;
step 18: after the main structure construction is finished, the tool type formwork support steel platform is descended to the ground, disassembly is carried out, and then a temporary support on the main structure is disassembled;
step 19: 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 high-altitude construction method of the multilayer large-span heavy-load concrete structure further comprises the following steps:
15' th step between 15 th step and 16 th step: the tool type formwork support steel platform is used as a subsequent equipment building installation project and indoor and outdoor decoration project construction platform, or other high-altitude construction work of the Nth layer is completed;
16' th step between 16 th and 17 th steps: and (3) using the tool type template support steel platform as a subsequent equipment building installation project and indoor and outdoor decoration project construction platform to finish other high-altitude construction work from the (N-1) th layer to the bottommost layer. Meaning that: after the high-altitude large-span concrete main structure roof layer is poured, the steel platform can be still used as a construction platform for construction workers to stand when the roof layer is decorated and supporting facilities are installed without dismantling the steel platform, construction safety is guaranteed, the steel platform is dismantled or lowered to a position between the (N-1) th layer and the (N-2) th layer after the roof layer is decorated and the supporting facilities are installed, and main structure construction of the (N-1) th layer and installation of the supporting facilities are carried out.
The technical scheme of the invention is specifically described below by taking a certain theater building project as an example.
1. Example engineering overview
The basic situation of a certain theater engineering building design is as follows:
2. general overview of high-altitude formwork support platform design
2.1 overview of tall and big formwork areas
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, determining a tall formwork region through risk analysis
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. The disk buckling type steel pipe support 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. Three rows of single-layer reinforced Bailey beams with 9 trusses are arranged right below the main beam with the size of 400mm multiplied by 1400mm, and the rest positions are single rows of 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, rapid construction of the main vertical structure, reverse construction of the multi-layer horizontal structure from top to bottom, capability of completing construction operation of most of projects with larger risks on the ground jig frame, effective reduction of the risk of high-altitude large-span high-formwork construction operation, safety, reliability and simple 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 real-time monitoring data, the whole process is automatically lifted and descended to run, the deviation is automatically corrected, and the risk of misoperation of personnel is reduced.
The foregoing is a preferred embodiment of the present invention, and it should be noted that those skilled in the art can make several improvements and modifications without departing from the principle and method of the present invention, and these improvements and modifications should be considered as the protection scope of the present invention.
Claims (8)
1. The utility model provides a high altitude construction method of heavy load concrete structure is striden greatly to multilayer, utilizes intelligent lift instrument formula template support steel platform to combine wisdom monitoring system, constructs the horizontal structure of heavy load concrete structure is striden greatly to multilayer from N layer top-down contrary preface, realizes instrument formula template support steel platform independently to rectify the balance, promote and descend in step which characterized in that, includes following step:
step 1: calculating and determining working condition loads and combined effects thereof in the construction of the high-altitude large-span heavy-load main body structure, modeling calculation and overall analysis of construction working conditions, rechecking stress state, rigidity and deformation analysis under each working condition of the construction of the main body vertical structure, designing connecting nodes of the horizontal structure and the main body vertical structure after watering, and reinforcing the original structure;
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 design 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: designing an additional node for temporary support according to the tool type steel truss support requirement and the working requirement of the intelligent lifting machine;
and 8, step 8: the temporary supporting condition rechecking, supplementary design, manufacturing and arrangement required by the installation of the tool type template supporting steel platform and the lifting machine on the vertical main body structure are used for processing a technical checking order, and the temporary supporting condition rechecking, supplementary design, manufacturing and arrangement comprise a temporary supporting bracket and a top temporary operating platform;
step 9: constructing the vertical main 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 tool type template support steel platform;
and 11, step 11: arranging a steel platform integral lifting intelligent control system and an intelligent safety monitoring system for networking and debugging;
step 12: carrying out load prepressing test, detection, acceptance inspection and monitoring on the tool type steel platform and the template support frame on the ground;
step 13: according to the ground load prepressing test, detection and monitoring results, the stress strain of the key part is checked, the safety and deflection deformation calculation parameters of the tool type template support steel platform are checked, the inverted arch value required by the main body horizontal structure is accurately reserved, excessive deformation is eliminated, and the geometric dimension and position of the main body structure are ensured to meet the design requirements;
step 14: the tool type template supporting steel platform which starts intelligent control is integrally and synchronously lifted to a proper position between the Nth layer and the (N-1) th layer, and the tool type template supporting steel platform is laid and fixed;
step 15: the tool type template support steel platform is utilized to carry out high-altitude large-span heavy-load concrete main body horizontal structure roof layer construction, namely the Nth layer construction, a hole needs to be reserved on a floor at the position of a lifting steel strand, N-1 layers of material inlet and outlet parts or a feeding platform needs to be reserved at the same time, and intelligent safety monitoring, monitoring and early warning are carried out in the whole process;
step 16: when N layers of concrete reach a preset formwork removal condition, loosening the adjustable supports, integrally descending the tool type formwork support steel platform to a position between the (N-1) th layer and the (N-2) th layer by using an intelligent control system, carrying out next-layer high-altitude large-span heavy-load concrete main body horizontal structure construction on the (N-1) th layer, and carrying out intelligent safety monitoring, monitoring and early warning in the whole process;
step 17: repeating the 15 th step and the 16 th step to complete the top-down reverse-order construction of the main structure of the high-altitude large-span heavy-load concrete from the (N-1) th layer to the bottommost layer, and intelligently and safely monitoring;
step 18: after the main structure construction is finished, the tool type formwork support steel platform is descended to the ground, disassembly is carried out, and then a temporary support on the main structure is disassembled;
step 19: 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 high-altitude construction method of the multi-layer large-span heavy-load concrete structure according to claim 1, further comprising:
15' th step between 15 th step and 16 th step: the tool type formwork support steel platform is used as a subsequent equipment building installation project and indoor and outdoor decoration project construction platform, or other high-altitude construction work of the Nth layer is completed;
16' th step between 16 th and 17 th steps: and (3) using the tool type template support steel platform as a subsequent equipment building installation project and indoor and outdoor decoration project construction platform to finish other high-altitude construction work from the (N-1) th layer to the bottommost layer.
3. The high-altitude construction method of the multi-layer large-span heavy-load concrete structure according to claim 1, wherein in the step 10, the temporary support of the tool type formwork support steel platform 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 high-altitude construction method of the multi-layer large-span heavy-load concrete structure according to claim 3, wherein the corbel is a steel structure corbel or a cast-in-place integral corbel embedded on the vertical structures of the main bodies on two sides.
5. The high-altitude construction method of the multi-layer large-span heavy-load concrete structure according to claim 1, wherein the tool type formwork support steel platform in the step 4 is loaded by adopting a 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 frames and multiple-row single-layer Bailey frames which are transversely arranged in a span manner, the support secondary beams are arranged above the Bailey truss main beams, the single-row single-layer Bailey frames and the multiple-row single-layer Bailey frames 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 a plurality of I-shaped steels or C-shaped steels which are laid above the Bailey truss main beams, and further comprise.
6. The high-altitude construction method of the multi-layer large-span heavy-load concrete structure according to 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 high-altitude construction method of the multi-layer large-span heavy-load concrete structure according to claim 3 or 4, wherein a plurality of through grooves are formed in the corbel at intervals along the longitudinal direction.
8. The high-altitude construction method of the multi-layer large-span heavy-load concrete structure according to claim 1, wherein in the step 10, the intelligent hoisting 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, on-line data analysis intelligent early warning system, synchronous lifting special program software with automatic deviation correcting and emergency locking functions, horizontal position state signal sensor, stress and deformation signal sensor, multi-channel signal conversion processor, data signal line or short-range communication wireless signal link.
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| CN113047617B (en) * | 2021-03-26 | 2022-08-23 | 宁波建工建乐工程有限公司 | Formwork supporting platform for high-altitude corridor construction and construction method thereof |
| CN113494127A (en) * | 2021-07-09 | 2021-10-12 | 上海宝冶集团有限公司 | Construction method for layered lifting of large-span open-web corridor steel platform |
| CN115354844B (en) * | 2022-09-19 | 2024-02-09 | 上海建工集团股份有限公司 | Integral sliding-down type steel platform system for round deep foundation pit |
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| CN101886468B (en) * | 2010-03-29 | 2011-08-24 | 南京大地建设集团有限责任公司 | Construction method of suspension type template support in high-position conjoined structure |
| CN103291076B (en) * | 2013-07-03 | 2014-03-19 | 江苏南通六建建设集团有限公司 | Multilayer steel truss fragmented reverse hoisting construction method in arc-shaped frame |
| CN203947771U (en) * | 2014-07-16 | 2014-11-19 | 北京万兴建筑集团有限公司 | A kind of Bailey beam pendent form support system |
| CN104088467B (en) * | 2014-07-17 | 2016-05-25 | 成都市第四建筑工程公司 | A kind of large Steel Cantilever truss structure high-altitude construction Deformation monitoring method |
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