Formwork erecting method for outer cantilever beam of side span beam

Abstract

A side span beam outer cantilever beam formwork erecting method relates to the technical field of side span beam outer cantilever beam formwork erecting, and comprises the following steps: constructing a first BIM model capable of reflecting a real side span beam and cantilever beam structure, and performing formwork erecting load analysis on the side span beam and cantilever beam structure to obtain a first load parameter; calculating according to the first load parameter to obtain a first formwork structure of the side span beam and the cantilever beam; constructing a second BIM model capable of reflecting a real surrounding building structure according to the parameters of the surrounding building structure; the method comprises the steps that a first BIM model and a second BIM model are used for obtaining a first load parameter, a second load parameter is obtained through the first BIM model and the second BIM model, and on the basis of a first formwork structure, the second load parameter is used for adjusting the first formwork structure so that the formwork structure can meet the load requirement. The precision of a load calculation result is improved, and the effect of maintaining the use stability of the formwork structure is achieved.

Description

Technical Field

[0001] The invention relates to the technical field of cantilevered formwork for side span beams, and in particular to a cantilevered formwork method for side span beams. Background Art

[0002] As a common structural form, cantilever beam is fixedly supported at one end and cantilevered in the air at the other end, forming a structure with a larger span.

[0003] As a key component of the building structure, the cantilever beam requires a very important formwork technology during its construction. Formwork is not only related to the accuracy and stability of the cantilever beam, but also directly affects the safety and durability of the entire structure. Due to its unique cantilever structure, the cantilever beam requires a special support and formwork system during the construction process to ensure the accuracy of its shape and size.

[0004] In the existing formwork methods, in order to make the formwork structure stable, the formwork structure is generally determined based on the calculated load of the formwork process. However, the existing formwork methods do not take the factors of the construction location into consideration when determining the load, which results in inaccurate load data calculation results, causing the calculated formwork structure to have insufficient stability during use. Summary of the invention

[0005] An embodiment of the present invention provides a method for supporting formwork for cantilevered beams outside side span beams, which identifies the loads generated during the formwork process, extracts the loads associated with the position for targeted calculation, improves the accuracy of the load calculation results, and achieves the effect of maintaining the stability of the formwork structure.

[0006] A method for supporting formwork for an outer cantilever beam of a side span beam comprises the following steps:

[0007] According to the structural parameters of the side span beam and cantilever beam, the first BIM model that can reflect the real side span beam and cantilever beam structure is constructed;

[0008] Using the first BIM model, formwork load analysis is performed on the side span beam and cantilever beam structure to obtain first load parameters, including structural dead load parameters and construction live load parameters;

[0009] The first formwork structure of the side span beam and the cantilever beam is calculated according to the first load parameter;

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

[0011] Using the first and second BIM models to construct a meteorological simulation environment, importing meteorological data of the construction location, performing formwork load analysis on the side span beam and cantilever beam structure, and obtaining second load parameters, including wind load parameters and / or temperature load parameters;

[0012] On the basis of the first formwork structure, the first formwork structure is adjusted using the second load parameter so that the formwork structure meets the load requirement, thereby obtaining the second formwork structure.

[0013] Further, the step of calculating the first load includes:

[0014] Calculate the constant load parameters of the side span beam and cantilever beam structure formwork process according to the parameters of the first BIM model;

[0015] According to the construction plan, the loads on construction personnel and equipment and the loads generated when vibrating concrete during the construction process are identified to obtain the construction live load parameters.

[0016] Further, the step of calculating the second load parameter includes:

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

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

[0019] Importing the above-mentioned wind speed and / or temperature limit values ​​into a meteorological simulation environment constructed by using the first and second BIM models for simulation;

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

[0021] Further, the step of calculating the second load parameter includes:

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

[0023] Extracting historical meteorological data within the current construction period from the historical meteorological data, and taking the average value of wind speed and / or temperature from the historical meteorological data within the construction period;

[0024] Importing the mean value of the wind speed and / or temperature into the meteorological simulation environment constructed by using the first and second BIM models for simulation;

[0025] The wind load parameters and / or temperature load parameters within the construction period are obtained.

[0026] Further, the step of calculating the second load parameter includes:

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

[0028] Extracting historical meteorological data within the current construction period from the historical meteorological data, and taking the average value of wind speed and / or temperature from the historical meteorological data within the construction period;

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

[0030] Collect real-time weather data in the area based on geographic information;

[0031] Extract wind speed and / or temperature data from meteorological data and import them into a meteorological simulation environment constructed by using the first and second BIM models to perform simulation calculations 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 smaller than the fixed load, the fixed load is not updated. When the dynamic load is larger than the fixed load, the fixed load is updated according to the dynamic load.

[0033] Furthermore, the second load parameter is used to adjust the first formwork structure in real time so that the formwork structure meets the load requirement, thereby obtaining a second formwork structure.

[0034] Furthermore, the step of determining whether the second formwork structure meets the load requirement includes:

[0035] introducing a first load and applying it to the second formwork structure;

[0036] Analyze the deformation and posture of the second formwork structure according to the set deformation threshold and posture threshold;

[0037] introducing a second load to be applied to the second formwork structure;

[0038] Analyze the deformation and posture of the second formwork structure according to the set deformation threshold and posture threshold;

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

[0040] Furthermore, the meteorological simulation environment includes an airflow simulation model and a temperature simulation model.

[0041] Furthermore, the steps of simulating using the airflow simulation model include:

[0042] Using the first and second BIM models to construct an airflow simulation model;

[0043] Divide the BIM model of the side span beam and cantilever beam into calculation grids, and set the density and type of the grids;

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

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

[0046] Furthermore, the steps of simulating using the temperature simulation model include:

[0047] Constructing a temperature simulation model using the first and second BIM models;

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

[0049] Import temperature data from meteorological data to perform temperature simulation and conduct thermal stress analysis on the formwork structure;

[0050] Monitor 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 technical solution provided by the embodiment of the present invention include at least:

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

[0054] Other features and advantages of the present invention will be described in the following description, and partly become apparent from the description, or understood by practicing the present invention. The purpose and other advantages of the present invention can be realized and obtained by the structures particularly pointed out in the written description, claims, and drawings.

[0055] The technical solution of the present invention is further described in detail below through the accompanying drawings and embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0056] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0057] Figure 1 The present invention is a flow chart of a method for supporting formwork for cantilevered beams outside side span beams disclosed in an embodiment of the present invention. DETAILED DESCRIPTION

[0058] The exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. Although the exemplary embodiments of the present disclosure are shown in the accompanying drawings, it should be understood that the present disclosure can be implemented in various forms and should not be limited by the embodiments set forth herein. On the contrary, these embodiments are provided to enable a more thorough understanding of the present disclosure and to fully convey the scope of the present disclosure to those skilled in the art.

[0059] The technical solution of the present invention can be simplified as follows:

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

[0061] 2. Use its position and weather conditions to calculate the load in the current construction, reduce the deviation between the load calculated in the current cantilever beam formwork construction of the side span beam and the actual load, so that the calculated load can truly match the load in the formwork process;

[0062] By carrying out 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 the construction process, and ensure the construction quality of the cantilever beam.

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

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

[0065] In building structures, side span 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 side span beams. The structural parameters of the side span beams and cantilever beams in the construction drawings are used to construct a model of the side span beam and cantilever beam structure, which is defined as the first BIM model.

[0066] The above-mentioned method of constructing the BIM model according to parameters adopts the existing technology, and its specific construction process will not be repeated here.

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

[0068] The steps to calculate the first load include:

[0069] S21, calculating the constant load parameters of the side span beam and cantilever beam structure formwork process according to the parameters of the first BIM model;

[0070] S22, according to the construction plan, identifying the loads of construction personnel and equipment during the construction process, and the loads generated when vibrating concrete, and obtaining construction live load parameters.

[0071] S3, obtaining a first formwork structure of the side span beam and the cantilever beam by calculation according to the first load parameter.

[0072] include:

[0073] S31, determine the supporting materials: select appropriate supporting materials such as steel pipes, wooden beams, etc. according to the load size and construction requirements.

[0074] S32, calculate the size of the supporting rods: according to the load calculation results, calculate the cross-sectional size, spacing and other parameters of the supporting rods through structural mechanics analysis.

[0075] S33, arrange the support system: according to the calculation results and design requirements, arrange the support system, including horizontal support, vertical support and inclined support, to ensure that the support system is stable and reliable.

[0076] S34, consider safety measures: fully consider safety measures in the design, such as setting up safety nets, guardrails, etc., to ensure construction safety.

[0077] S4, constructing a second BIM model that can reflect the actual surrounding building structure according to the parameters of the surrounding building structure.

[0078] The above-mentioned surrounding buildings are buildings adjacent to the current construction buildings.

[0079] S5, using the first and second BIM models to build a meteorological simulation environment, importing the meteorological data of the construction location, performing formwork load analysis on the side span beam and cantilever beam structure, and obtaining second load parameters, including wind load parameters and / or temperature load parameters.

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

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

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

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

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

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

[0086] S51b, obtaining geographic information of the construction area, and collecting historical meteorological data of the area based on the geographic information;

[0087] S52b, extracting historical meteorological data within the current construction period from the historical meteorological data, and taking out the average value of wind speed and / or temperature from the historical meteorological data within the construction period;

[0088] S53b, importing the average value of the wind speed and / or temperature into a meteorological simulation environment constructed by using the first and second BIM models for simulation;

[0089] S54b, obtaining wind load parameters and / or temperature load parameters within the construction period.

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

[0091] S51c, obtaining geographic information of the construction area, and collecting historical meteorological data of the area based on the geographic information;

[0092] S52c, extracting historical meteorological data within the current construction period from the historical meteorological data, and taking out the average value of wind speed and / or temperature from the historical meteorological data within the construction period;

[0093] S53c, importing the mean value of the wind speed and / or temperature into the meteorological simulation environment constructed by using the first and second BIM models to simulate and obtain fixed wind load parameters and / or temperature load parameters within the construction period, and defining them as fixed loads;

[0094] S54c, collecting real-time meteorological data of the area according to geographic information;

[0095] S55c, extracting wind speed and / or temperature data from the meteorological data and importing them into a meteorological simulation environment constructed by using the first and second BIM models to perform simulation calculations to obtain real-time wind load parameters and / or temperature load parameters within the construction period, and defining them as dynamic loads;

[0096] S56c, when the dynamic load is smaller than the fixed load, the fixed load is not updated; when the dynamic load is larger than the fixed load, the fixed load is updated according to the dynamic load.

[0097] The technical effect produced by the first embodiment described above is that the formwork system does not need to be modified during the subsequent construction process after construction. However, the materials required for use are relatively high, which increases the construction cost and construction period.

[0098] The technical effect produced by the above-mentioned second embodiment is that the formwork system does not need to be modified during the subsequent construction process after construction. However, there are no special requirements for the materials used. However, when extreme weather (extreme high and low temperatures, extreme wind speeds) occurs, the formwork structure needs to be adjusted.

[0099] The technical effect produced by the third embodiment described above is that, based on the technical effect produced by the second embodiment, when weather changes occur or weather changes are predicted, an adjustment plan can be quickly given to ensure the stability of the formwork structure.

[0100] The above-mentioned meteorological simulation environment includes an airflow simulation model and a temperature simulation model.

[0101] The steps for simulating using the airflow simulation model include:

[0102] Using the first and second BIM models to construct an airflow simulation model;

[0103] Divide the BIM model of the side span beam and cantilever beam into calculation grids, and set the density and type of the grids;

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

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

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

[0107] Constructing a temperature simulation model using the first and second BIM models;

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

[0109] Import temperature data from meteorological data to perform temperature simulation and conduct thermal stress analysis on the formwork structure;

[0110] Monitor 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, using the second load parameter to adjust the first formwork structure so that the formwork structure meets the load requirement, thereby obtaining a second formwork structure.

[0113] The step of determining whether the second formwork structure meets the load requirement includes:

[0114] S61, introducing a first load and applying it to the second formwork structure;

[0115] S62, analyzing the deformation and posture of the second formwork structure according to the set deformation threshold and posture threshold;

[0116] S63, introducing a second load and applying it to the second formwork structure;

[0117] S64, analyzing the deformation and posture of the second formwork structure according to the set deformation threshold and posture threshold;

[0118] S65, judging the stability of the second formwork structure according to the above deformation and posture analysis results.

[0119] The present invention identifies the loads generated during the formwork process, extracts the loads associated with the position for targeted calculation. Compared with the existing cantilever beam formwork method, the load parameters calculated based on the environment of the current construction location are more accurate and more suitable for the current construction of side span beams and cantilever beams, effectively improving the accuracy of the 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 can be rearranged without departing from the scope of protection of the present disclosure. The attached method claims present the elements of the various steps in an exemplary order and are not intended to be limited to the specific order or hierarchy described.

[0121] In the above detailed description, various features are grouped together in a single embodiment to simplify the disclosure. This method of disclosure should not be interpreted as reflecting an intention that the embodiments of the claimed subject matter require more features than are clearly stated in each claim. On the contrary, as reflected in the appended claims, the invention is in a state of having less than all the features of the disclosed individual embodiments. Therefore, the appended claims are hereby expressly incorporated into the detailed description, with each claim standing on its own as a separate preferred embodiment of the invention.

[0122] Those skilled in the art will also appreciate that the various illustrative logic blocks, modules, circuits, and algorithmic steps described in conjunction with the embodiments herein can all be implemented as electronic hardware, computer software, or a combination thereof. In order to clearly illustrate the interchangeability between hardware and software, various illustrative components, blocks, modules, circuits, and steps are generally described above around their functions. Whether such functions are implemented as hardware or software depends on specific applications and the design constraints imposed on the entire system. A skilled person can implement the described functions in an alternative manner for each specific application, but such implementation decisions should not be interpreted as departing from the scope of protection of the present disclosure.

[0123] The steps of the method or algorithm described in conjunction with the embodiments herein may be directly embodied as hardware, a software module executed by a processor, or a combination thereof. The software module may be located in a RAM memory, a flash memory, a ROM memory, an EPROM memory, an EEPROM memory, a register, a hard disk, a mobile disk, a CD-ROM, or any other form of storage medium well known in the art. An exemplary storage medium is connected to the processor so that the processor can read information from the storage medium and can write information to the storage medium. Of course, the storage medium may also be an integral part of the processor. The processor and the storage medium may be located in an ASIC. The ASIC may be located in a user terminal. Of course, the processor and the storage medium may also be present in a user terminal as discrete components.

[0124] For software implementation, the techniques described in this application can be implemented with modules (e.g., procedures, functions, etc.) that perform the functions described in this application. These software codes can be stored in a memory unit and executed by a processor. The memory unit can be implemented within the processor or outside the processor. In the latter case, it is coupled to the processor in a communication manner via various means, which are well known in the art.

[0125] The above description includes examples of one or more embodiments. Of course, it is impossible to describe all possible combinations of components or methods for the purpose of describing the above embodiments, but it should be recognized by those skilled in the art that the various embodiments may 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 protection of the appended claims. In addition, with respect to the term "comprising" used in the specification or claims, the word is covered in a manner similar to the term "including", just as "including," is explained as a transitional word in the claims. In addition, any term "or" used in the specification of the claims is intended to mean "non-exclusive or".

Claims

1. A method for supporting formwork for cantilevered beams of side span beams, characterized in that: The steps include: According to the structural parameters of the side span beam and cantilever beam, the first BIM model that can reflect the real side span beam and cantilever beam structure is constructed; Using the first BIM model, formwork load analysis is performed on the side span beam and cantilever beam structure to obtain first load parameters, including structural dead load parameters and construction live load parameters; The first formwork structure of the side span beam and the cantilever beam is calculated according to the first load parameter; A second BIM model that reflects the actual surrounding building structure is constructed based on the parameters of the surrounding building structure; Using the first and second BIM models to construct a meteorological simulation environment, importing meteorological data of the construction location, performing formwork load analysis on the side span beam and cantilever beam structure, and obtaining second load parameters, including wind load parameters and / or temperature load parameters; On the basis of the first formwork structure, the first formwork structure is adjusted using the second load parameter so that the formwork structure meets the load requirement, thereby obtaining the second formwork structure.

2. A method for supporting formwork for cantilevered side span beams as claimed in claim 1, characterized in that: The steps to calculate the first load include: Calculate the constant load parameters of the side span beam and cantilever beam structure formwork process according to the parameters of the first BIM model; According to the construction plan, the loads on construction personnel and equipment and the loads generated when vibrating concrete during the construction process are identified to obtain the construction live load parameters.

3. A method for supporting formwork for cantilevered side span beams as claimed 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; Respectively extract the extreme values ​​of wind speed and / or temperature from the historical meteorological data; Importing the above-mentioned wind speed and / or temperature limit values ​​into a meteorological simulation environment constructed by using the first and second BIM models for simulation; Get wind load parameters and / or temperature load parameters.

4. A method for supporting formwork for cantilevered side span beams as claimed 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; Extracting historical meteorological data within the current construction period from the historical meteorological data, and taking the average value of wind speed and / or temperature from the historical meteorological data within the construction period; Importing the mean value of the wind speed and / or temperature into the meteorological simulation environment constructed by using the first and second BIM models for simulation; The wind load parameters and / or temperature load parameters within the construction period are obtained.

5. A method for supporting formwork for cantilevered side span beams as claimed 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; Extracting historical meteorological data within the current construction period from the historical meteorological data, and taking the average value of wind speed and / or temperature from the historical meteorological data within the construction period; The mean values ​​of the wind speed and / or temperature are imported into the meteorological simulation environment constructed by using the first and second BIM models to perform simulation to obtain fixed wind load parameters and / or temperature load parameters within the construction period, which are defined as fixed loads; Collect real-time weather data in the area based on geographic information; Extract wind speed and / or temperature data from meteorological data and import them into a meteorological simulation environment constructed by using the first and second BIM models to perform simulation calculations 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 smaller than the fixed load, the fixed load is not updated. When the dynamic load is larger than the fixed load, the fixed load is updated according to the dynamic load.

6. A method for supporting formwork for cantilevered side span beams as claimed in claim 5, characterized in that: The first formwork structure is adjusted in real time using the second load parameter so that the formwork structure meets the load requirement, thereby obtaining a second formwork structure.

7. A method for supporting formwork for cantilevered side span beams as claimed in claim 1, characterized in that: The steps for determining whether the second formwork structure meets the load requirements include: introducing a first load and applying it to the second formwork structure; Analyze the deformation and posture of the second formwork structure according to the set deformation threshold and posture threshold; introducing a second load to be applied to the second formwork structure; Analyze the deformation and posture of the second formwork structure according to the set deformation threshold and posture threshold; The stability of the second formwork structure is determined based on the above deformation and posture analysis results.

8. A method for supporting formwork for cantilevered side span beams as claimed in claim 1, characterized in that: The meteorological simulation environment includes airflow simulation model and temperature simulation model.

9. A method for supporting formwork for cantilevered side span beams as claimed in claim 8, characterized in that: The steps for simulating using the airflow simulation model include: Using the first and second BIM models to construct an airflow simulation model; Divide the BIM model of the side span beam and cantilever beam into calculation grids, and set the density and type of the grids; Import wind speed data from meteorological data and adjust wind direction to simulate wind speed and airflow; Extract wind load parameters obtained from computational grid monitoring.

10. A method for supporting formwork for cantilevered side span beams as claimed in claim 8, characterized in that: The steps for simulation using the temperature simulation model include: Constructing a temperature simulation model using the first and second BIM models; Identify the materials used in the formwork process for side span beams and cantilever beams; Import temperature data from meteorological data to perform temperature simulation and conduct thermal stress analysis on the formwork structure; Monitor 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.

Images