A method for supporting formwork of an outer cantilever beam of a side span beam

Abstract

A kind of method for supporting formwork of side span beam outer cantilever beam, it is related to side span beam outer cantilever beam formwork supporting technical field, including first BIM model that can reflect real side span beam, cantilever beam structure is constructed and side span beam and cantilever beam structure are analyzed, and first load parameter is obtained Load parameter is calculated according to the first load parameter, and the first formwork structure of side span beam and cantilever beam is obtained;Second BIM model that can reflect real surrounding building structure is constructed according to the parameter of surrounding building structure;Second load parameter is obtained using first and second BIM model, on the basis of first formwork structure, first formwork structure is adjusted using second load parameter, to make formwork structure satisfy load demand, the load generated in the process of formwork is identified in the present application, the load associated with position is extracted for targeted calculation, the accuracy of load calculation result is improved, the effect of keeping formwork structure stable is realized.

Description

Technical Field

[0001] This invention relates to the field of formwork technology for cantilever beams in side spans, and specifically to a method for formwork support of cantilever beams in side spans. Background Technology

[0002] As a common structural form, the cantilever beam is fixed and supported at one end, while the other end is suspended in the air, forming a structure with a large span.

[0003] As a key component of building structures, the formwork technology during the construction of cantilever beams is of paramount importance. Formwork not only affects the accuracy and stability of the cantilever beam's formation but also directly impacts the safety and durability of the entire structure. Due to its unique cantilever structure, cantilever beams require specialized support and formwork systems during construction to ensure the accuracy of their shape and dimensions.

[0004] In existing formwork support methods, in order to ensure the stability of the formwork structure, the formwork structure is generally determined based on the calculated loads during the formwork support process. However, existing formwork support methods do not consider the location of the construction site when determining the loads, which leads to inaccurate load data calculation results. As a result, the calculated formwork structure may have insufficient stability during use. Summary of the Invention

[0005] This invention provides a method for supporting the formwork of an external cantilever beam in a side span. The method identifies the loads generated during the formwork process, extracts the loads associated with the location, and performs targeted calculations to improve the accuracy of the load calculation results, thereby maintaining the stability of the formwork structure.

[0006] A method for formwork support of an external cantilever beam in a side span includes the following steps:

[0007] Based on the structural parameters of the side span beams and cantilever beams, a first BIM model that can reflect the actual structure of the side span beams and cantilever beams is constructed.

[0008] Using the first BIM model mentioned above, the formwork load analysis of the side span beam and cantilever beam structure was carried out to obtain the first load parameters, including structural dead load parameters and construction live load parameters.

[0009] The first formwork structure of the side span beam and cantilever beam is calculated based on the first load parameters;

[0010] A second BIM model that reflects the actual surrounding building structure is constructed based on the parameters of the surrounding building structure.

[0011] A meteorological simulation environment was constructed using the first and second BIM models. Meteorological data of the construction location was imported, and the formwork load analysis was performed on the side span beam and cantilever beam structure to obtain the second load parameters, including wind load parameters and / or temperature load parameters.

[0012] Based on the first formwork structure, the first formwork structure is adjusted using the second load parameters to ensure that the formwork structure meets the load requirements, thus obtaining the second formwork structure.

[0013] Furthermore, the steps for calculating the first load include:

[0014] The dead load parameters of the side span beam and cantilever beam structure during the formwork support process are calculated based on the parameters of the first BIM model.

[0015] Based on the construction plan, identify the loads of construction personnel and equipment during construction, as well as the loads generated during concrete vibration, to obtain the construction live load parameters.

[0016] Furthermore, the steps for calculating the second load parameter include:

[0017] Obtain geographic information of the construction area and collect historical meteorological data of the area based on the geographic information;

[0018] Extract the extreme values ​​of wind speed and / or temperature from historical meteorological data respectively;

[0019] The extreme values ​​of wind speed and / or temperature mentioned above are imported into the meteorological simulation environment constructed using the first and second BIM models for simulation.

[0020] Obtain wind load parameters and / or temperature load parameters.

[0021] Furthermore, the steps for calculating the second load parameter include:

[0022] Obtain geographic information of the construction area and collect historical meteorological data of the area based on the geographic information;

[0023] Extract historical meteorological data for the current construction period from historical meteorological data, and extract the average wind speed and / or temperature from the historical meteorological data for the construction period.

[0024] The average values ​​of the wind speed and / or temperature mentioned above are imported into the meteorological simulation environment constructed using the first and second BIM models for simulation.

[0025] Obtain wind load parameters and / or temperature load parameters during the construction period.

[0026] Furthermore, the steps for calculating the second load parameter include:

[0027] Obtain geographic information of the construction area and collect historical meteorological data of the area based on the geographic information;

[0028] Extract historical meteorological data for the current construction period from historical meteorological data, and extract the average wind speed and / or temperature from the historical meteorological data for the construction period.

[0029] The average values ​​of the wind speed and / or temperature are imported into the meteorological simulation environment constructed using the first and second BIM models to obtain the fixed wind load parameters and / or temperature load parameters during the construction period, which are defined as fixed loads.

[0030] Real-time meteorological data for the area is collected based on geographic information.

[0031] Wind speed and / or temperature data are extracted from meteorological data and imported into a meteorological simulation environment constructed using the first and second BIM models. Simulation calculations are then performed to obtain real-time wind load parameters and / or temperature load parameters within the construction period, which are defined as dynamic loads.

[0032] When the dynamic load is less than the fixed load, the fixed load is not updated; when the dynamic load is greater than the fixed load, the fixed load is updated based on the dynamic load.

[0033] Furthermore, the first formwork structure is adjusted in real time using the second load parameter to ensure that the formwork structure meets the load requirements, thus obtaining the second formwork structure.

[0034] Furthermore, the steps to determine whether the second formwork structure meets the load requirements include:

[0035] The first load is applied to the second formwork structure;

[0036] Based on the set deformation threshold and attitude threshold, the deformation and attitude of the second support structure are analyzed;

[0037] A second load is applied to the second formwork structure.

[0038] Based on the set deformation threshold and attitude threshold, the deformation and attitude of the second support structure are analyzed;

[0039] The stability of the second formwork structure is determined based on the above deformation and attitude analysis results.

[0040] Furthermore, the meteorological simulation environment includes airflow simulation models and temperature simulation models.

[0041] Furthermore, the steps for performing simulations using an airflow simulation model include:

[0042] An airflow simulation model was constructed using the first and second BIM models;

[0043] Divide the BIM model of the side span beam and cantilever beam into a computational mesh, and set the mesh density and type;

[0044] Import wind speed data from meteorological data and adjust the wind direction to simulate wind speed and airflow;

[0045] Extract wind load parameters obtained from computational grid monitoring.

[0046] Furthermore, the steps for performing simulations using a temperature simulation model include:

[0047] A temperature simulation model was constructed using the first and second BIM models;

[0048] Identify the materials used in the formwork erection process for side span beams and cantilever beams;

[0049] Temperature data from meteorological data is imported to perform temperature simulation and thermal stress analysis on the formwork structure.

[0050] Monitoring the stress and its distribution caused by material deformation;

[0051] The temperature load parameters of the formwork structure are calculated based on the thermal stress analysis of the formwork structure.

[0052] The beneficial effects of the above-described technical solutions provided in the embodiments of the present invention include at least the following:

[0053] This invention identifies the loads generated during the formwork erection process, extracts the loads associated with the location, and performs targeted calculations. Compared with existing cantilever beam formwork erection methods, the load parameters calculated based on the current construction location environment are more accurate and more suitable for the construction of the current side span beams and cantilever beams, effectively improving the accuracy of load calculation results and achieving the effect of maintaining the stability of the formwork structure.

[0054] Other features and advantages of the invention will be set forth in the description which follows, and will be apparent in part from the description, or may be learned by practicing the invention. The objects and other advantages of the invention may be realized and obtained by means of the structures particularly pointed out in the written description, claims, and drawings.

[0055] The technical solution of the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. Attached Figure Description

[0056] The accompanying drawings are provided to further illustrate the invention and form part of the specification. They are used in conjunction with embodiments of the invention to explain the invention and do not constitute a limitation thereof. In the drawings:

[0057] Figure 1 This is a flowchart of the formwork support method for the external cantilever beam of the side span beam disclosed in an embodiment of the present invention. Detailed Implementation

[0058] Exemplary embodiments of the present disclosure will now be described in more detail with reference to the accompanying drawings. While exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be implemented in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art.

[0059] The technical solution in this invention can be simplified as follows:

[0060] 1. Decompose the loads during the formwork erection process of the cantilever beam on the side span and extract the loads related to location and meteorological factors;

[0061] 2. Utilize its location and weather conditions to calculate the load during the current construction, reduce the deviation between the calculated load and the actual load during the formwork construction of the side span beam cantilever beam, and ensure that the calculated load can truly match the load during the formwork process.

[0062] By performing targeted load calculations based on the actual construction environment, the final formwork structure can meet the load requirements during actual use, maintain the stability of the formwork structure during construction, and ensure the construction quality of the cantilever beam.

[0063] Figure 1 The flowchart of the formwork support method for the external cantilever beam of the side span beam disclosed in the embodiment of the present invention is shown, including the following steps:

[0064] S1. Based on the structural parameters of the side span beams and cantilever beams, a first BIM model that can reflect the actual structure of the side span beams and cantilever beams is constructed.

[0065] In building structures, edge beams usually refer to beams located at the edge of the structure. In building structures with cantilever beams, the cantilever beams are connected to the edge beams. The model of the edge beam and cantilever beam structure is constructed using the structural parameters of the edge beam and cantilever beam in the construction drawings, and it is defined as the first BIM model.

[0066] The above-mentioned BIM model construction based on parameters uses existing technology, and its specific construction process will not be described in detail here.

[0067] S2. Using the first BIM model mentioned above, the formwork load analysis is performed on the side span beam and cantilever beam structure to obtain the first load parameters, including structural dead load parameters and construction live load parameters.

[0068] The steps for calculating the first load include:

[0069] S21, Calculate the dead load parameters of the side span beam and cantilever beam structure formwork support process based on the parameters of the first BIM model;

[0070] S22, Based on the construction plan, identify the loads of construction personnel and equipment during construction, as well as the loads generated during concrete vibration, to obtain the construction live load parameters.

[0071] S3, the first formwork structure of the side span beam and cantilever beam is calculated based on the first load parameters.

[0072] include:

[0073] S31, Determine the support materials: Select appropriate support materials, such as steel pipes, timber, etc., according to the load size and construction requirements.

[0074] S32, Calculate the dimensions of the support members: Based on the load calculation results, calculate the cross-sectional dimensions, spacing, and other parameters of the support members through structural mechanics analysis.

[0075] S33, Arrange the support system: Based on the calculation results and design requirements, arrange the support system, including horizontal supports, vertical supports and diagonal supports, to ensure the stability and reliability of the support system.

[0076] S34, Safety measures should be taken into consideration: Safety measures, such as safety nets and guardrails, should be fully considered in the design to ensure construction safety.

[0077] S4, constructs a second BIM model that reflects the actual surrounding building structure based on the parameters of the surrounding building structure.

[0078] The aforementioned surrounding buildings are those adjacent to the building currently under construction.

[0079] S5. Using the first and second BIM models, a meteorological simulation environment is constructed. Meteorological data of the construction location is imported, and the formwork load analysis is performed on the side span beam and cantilever beam structure to obtain the second load parameters, including wind load parameters and / or temperature load parameters.

[0080] In the first embodiment, the step of calculating the second load parameter includes:

[0081] S51a, Obtain geographic information of the construction area and collect historical meteorological data of the area based on the geographic information;

[0082] S52a, extract the extreme values ​​of wind speed and / or temperature from historical meteorological data respectively;

[0083] S53a, import the above-mentioned extreme values ​​of wind speed and / or temperature into the meteorological simulation environment constructed using the first and second BIM models for simulation;

[0084] S54a yields wind load parameters and / or temperature load parameters.

[0085] In the second embodiment, the step of calculating the second load parameter includes:

[0086] S51b: Obtain geographic information of the construction area and collect historical meteorological data of the area based on the geographic information;

[0087] S52b extracts historical meteorological data for the current construction period from historical meteorological data, and extracts the average wind speed and / or temperature from the historical meteorological data for the construction period.

[0088] S53b, import the average values ​​of the wind speed and / or temperature mentioned above into the meteorological simulation environment constructed using the first and second BIM models for simulation;

[0089] S54b obtains the wind load parameters and / or temperature load parameters during the construction period.

[0090] In the third embodiment, the step of calculating the second load parameter includes:

[0091] S51c: Obtain geographic information of the construction area and collect historical meteorological data of the area based on the geographic information.

[0092] S52c extracts historical meteorological data for the current construction period from historical meteorological data, and extracts the average wind speed and / or temperature from the historical meteorological data for the construction period.

[0093] S53c, import the average values ​​of the wind speed and / or temperature into the meteorological simulation environment constructed using the first and second BIM models to obtain the fixed wind load parameters and / or temperature load parameters during the construction period, and define them as fixed loads.

[0094] S54c collects real-time meteorological data of the area based on geographic information;

[0095] S55c, extract wind speed and / or temperature data from meteorological data, import and use the first and second BIM models to construct a meteorological simulation environment for simulation calculation to obtain real-time wind load parameters and / or temperature load parameters during the construction period, and define them as dynamic loads;

[0096] S56c: When the dynamic load is less than the fixed load, the fixed load is not updated; when the dynamic load is greater than the fixed load, the fixed load is updated based on the dynamic load.

[0097] The technical effect of the first embodiment is that the formwork system does not need to be modified during subsequent construction after the formwork is erected. However, it requires high-quality materials, which increases construction costs and time.

[0098] The technical effect of the second embodiment is that the formwork system does not need to be modified during subsequent construction after the formwork is erected. However, there are no special requirements for the materials used. But in the event of extreme weather (extreme high and low temperatures, extreme wind speeds), the formwork structure needs to be adjusted.

[0099] The technical effect of the third embodiment described above is that, based on the technical effect of the second embodiment, it can quickly provide an adjustment plan when weather changes occur or weather changes are predicted, thereby ensuring the stability of the formwork structure.

[0100] The meteorological simulation environment mentioned above includes airflow simulation models and temperature simulation models.

[0101] The steps for performing simulations using an airflow simulation model include:

[0102] An airflow simulation model was constructed using the first and second BIM models;

[0103] Divide the BIM model of the side span beam and cantilever beam into a computational mesh, and set the mesh density and type;

[0104] Import wind speed data from meteorological data and adjust the wind direction to simulate wind speed and airflow;

[0105] Extract wind load parameters obtained from computational grid monitoring.

[0106] The steps for performing a simulation using a temperature simulation model include:

[0107] A temperature simulation model was constructed using the first and second BIM models;

[0108] Identify the materials used in the formwork erection process for side span beams and cantilever beams;

[0109] Temperature data from meteorological data is imported to perform temperature simulation and thermal stress analysis on the formwork structure.

[0110] Monitoring the stress and its distribution caused by material deformation;

[0111] The temperature load parameters of the formwork structure are calculated based on the thermal stress analysis of the formwork structure.

[0112] S6. Based on the first formwork structure, the first formwork structure is adjusted using the second load parameter so that the formwork structure meets the load requirements, thus obtaining the second formwork structure.

[0113] The steps for determining whether the second formwork structure meets the load requirements include:

[0114] S61, apply the first load to the second formwork structure;

[0115] S62, Analyze the deformation and attitude of the second support structure according to the set deformation threshold and attitude threshold;

[0116] S63, apply the second load to the second formwork structure;

[0117] S64, Analyze the deformation and attitude of the second support structure according to the set deformation threshold and attitude threshold;

[0118] S65. Based on the above deformation and attitude analysis results, determine the stability of the second support structure.

[0119] This invention identifies the loads generated during the formwork erection process, extracts the loads associated with the location, and performs targeted calculations. Compared with existing cantilever beam formwork erection methods, the load parameters calculated based on the current construction location environment are more accurate and more suitable for the construction of the current side span beams and cantilever beams, effectively improving the accuracy of load calculation results and achieving the effect of maintaining the stability of the formwork structure.

[0120] It should be understood that the specific order or hierarchy of steps in the disclosed process is an example of an exemplary method. Based on design preferences, it should be understood that the specific order or hierarchy of steps in the process may be rearranged without departing from the scope of this disclosure. The appended method claims provide elements of various steps in an exemplary order and are not intended to limit the scope to the specific order or hierarchy described.

[0121] In the detailed description above, various features are combined together in a single embodiment to simplify this disclosure. This approach to disclosure should not be construed as reflecting an intention that embodiments of the claimed subject matter require more features than are explicitly stated in each claim. Rather, as reflected in the appended claims, the invention is presented with fewer features than all of the features in a single disclosed embodiment. Therefore, the appended claims are hereby explicitly incorporated into the detailed description, with each claim representing a separate preferred embodiment of the invention.

[0122] Those skilled in the art will also understand that the various illustrative logic blocks, modules, circuits, and algorithm steps described in conjunction with the embodiments herein can be implemented as electronic hardware, computer software, or a combination thereof. To clearly illustrate the interchangeability between hardware and software, the various illustrative components, blocks, modules, circuits, and steps described above are generally described in terms of their functionality. Whether such functionality is implemented as hardware or software depends on the specific application and the design constraints imposed on the overall system. Those skilled in the art can implement the described functionality in alternative ways for each specific application; however, such implementation decisions should not be construed as departing from the scope of this disclosure.

[0123] The steps of the methods or algorithms described in conjunction with the embodiments herein can be directly embodied in hardware, software modules executed by a processor, or a combination thereof. The software modules can reside in RAM memory, flash memory, ROM memory, EPROM memory, EEPROM memory, registers, hard disks, removable disks, CD-ROMs, or any other form of storage medium well known in the art. An exemplary storage medium is connected to the processor, enabling the processor to read information from and write information to the storage medium. Of course, the storage medium can also be a component of the processor. The processor and storage medium can reside in an ASIC. The ASIC can reside in a user terminal. Alternatively, the processor and storage medium can exist as discrete components in the user terminal.

[0124] For software implementation, the techniques described in this application can be implemented using modules (e.g., procedures, functions, etc.) that perform the functions described in this application. This software code can be stored in memory units and executed by a processor. The memory units can be implemented within the processor or outside the processor; in the latter case, they are communicatively coupled to the processor via various means, as is well known in the art.

[0125] The foregoing description includes examples of one or more embodiments. It is certainly impossible to describe all possible combinations of components or methods in order to describe the above embodiments, but those skilled in the art will recognize that the various embodiments can be further combined and arranged. Therefore, the embodiments described herein are intended to cover all such changes, modifications, and variations that fall within the scope of the appended claims. Furthermore, the term "comprising" as used in the specification or claims is interpreted in a manner similar to the term "including," as interpreted when used as a conjunction in the claims. Additionally, the use of any term "or" in the specification of the claims is intended to mean "non-exclusive or."

Claims

1. A method for formwork support of an external cantilever beam in a side span, characterized in that, Includes the following steps: Based on the structural parameters of the side span beams and cantilever beams, a first BIM model that can reflect the actual structure of the side span beams and cantilever beams is constructed. Using the first BIM model mentioned above, the formwork load analysis of the side span beam and cantilever beam structure was carried out to obtain the first load parameters, including structural dead load parameters and construction live load parameters. The first formwork structure of the side span beam and cantilever beam is calculated based on the first load parameters; A second BIM model that reflects the actual surrounding building structure is constructed based on the parameters of the surrounding building structure. A meteorological simulation environment was constructed using the first and second BIM models. Meteorological data of the construction location was imported, and the formwork load analysis was performed on the side span beam and cantilever beam structure to obtain the second load parameters, including wind load parameters and / or temperature load parameters. The steps for calculating the second load parameter include: Obtain geographic information of the construction area and collect historical meteorological data of the area based on the geographic information; Extract historical meteorological data for the current construction period from historical meteorological data, and extract the average wind speed and / or temperature from the historical meteorological data for the construction period. The average values ​​of the wind speed and / or temperature are imported into the meteorological simulation environment constructed using the first and second BIM models to obtain the fixed wind load parameters and / or temperature load parameters during the construction period, which are defined as fixed loads. Real-time meteorological data for the area is collected based on geographic information. Wind speed and / or temperature data are extracted from meteorological data and imported into a meteorological simulation environment constructed using the first and second BIM models. Simulation calculations are then performed to obtain real-time wind load parameters and / or temperature load parameters within the construction period, which are defined as dynamic loads. When the dynamic load is less than the fixed load, the fixed load is not updated; when the dynamic load is greater than the fixed load, the fixed load is updated based on the dynamic load. Based on the first formwork structure, the second load parameter is used to adjust the first formwork structure in real time so that the formwork structure meets the load requirements, thus obtaining the second formwork structure. The steps to determine whether the second formwork structure meets the load requirements include: The first load is applied to the second formwork structure; Based on the set deformation threshold and attitude threshold, the deformation and attitude of the second support structure are analyzed; A second load is applied to the second formwork structure. Based on the set deformation threshold and attitude threshold, the deformation and attitude of the second support structure are analyzed; The stability of the second formwork structure is determined based on the above deformation and attitude analysis results.

2. The method for formwork support of an external cantilever beam in a side span as described in claim 1, characterized in that, The steps for calculating the first load include: The dead load parameters of the side span beam and cantilever beam structure during the formwork support process are calculated based on the parameters of the first BIM model. Based on the construction plan, identify the loads of construction personnel and equipment during construction, as well as the loads generated during concrete vibration, to obtain the construction live load parameters.

3. The method for formwork support of an external cantilever beam in a side span as described in claim 1, characterized in that, The steps for calculating the second load parameter include: Obtain geographic information of the construction area and collect historical meteorological data of the area based on the geographic information; Extract the extreme values ​​of wind speed and / or temperature from historical meteorological data respectively; The extreme values ​​of wind speed and / or temperature mentioned above are imported into the meteorological simulation environment constructed using the first and second BIM models for simulation. Obtain wind load parameters and / or temperature load parameters.

4. The method for formwork support of an external cantilever beam in a side span as described in claim 1, characterized in that, The steps for calculating the second load parameter include: Obtain geographic information of the construction area and collect historical meteorological data of the area based on the geographic information; Extract historical meteorological data for the current construction period from historical meteorological data, and extract the average wind speed and / or temperature from the historical meteorological data for the construction period. The average values ​​of the wind speed and / or temperature mentioned above are imported into the meteorological simulation environment constructed using the first and second BIM models for simulation. Obtain wind load parameters and / or temperature load parameters during the construction period.

5. The method for formwork support of an external cantilever beam in a side span as described in claim 1, characterized in that, The meteorological simulation environment includes airflow simulation models and temperature simulation models.

6. The method for formwork support of an external cantilever beam in a side span as described in claim 5, characterized in that, The steps for performing simulations using an airflow simulation model include: An airflow simulation model was constructed using the first and second BIM models; Divide the BIM model of the side span beam and cantilever beam into a computational mesh, and set the mesh density and type; Import wind speed data from meteorological data and adjust the wind direction to simulate wind speed and airflow; Extract wind load parameters obtained from computational grid monitoring.

7. The method for formwork support of an external cantilever beam in a side span as described in claim 5, characterized in that, The steps for performing a simulation using a temperature simulation model include: A temperature simulation model was constructed using the first and second BIM models; Identify the materials used in the formwork erection process for side span beams and cantilever beams; Temperature data from meteorological data is imported to perform temperature simulation and thermal stress analysis on the formwork structure. Monitoring the stress and its distribution caused by material deformation; The temperature load parameters of the formwork structure are calculated based on the thermal stress analysis of the formwork structure.

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