Giant prestressed ring beam construction method based on analog simulation technology

Abstract

A giant prestressed ring beam construction method based on an analog simulation technology at least comprises the steps that overall analysis and complex node deepening are conducted by means of a BIM technology, and a steel bar three-dimensional lofting rule of a complex special-shaped space structure form component is provided; and building a steel bar BIM model: building the BIM model in the process, simulating the steel bar binding process, carrying out the successive steps of steel bar binding and formwork erecting, and guiding the construction of field workers. The method is used for solving the problems that in building structures such as large venues, a large-section-size prestressed ring beam is large in section size, steel bars are too dense, pouring is difficult, and the construction quality is difficult to control.

Description

Technical Field

[0001] The invention relates to the technical field of concrete building construction, in particular to a method for constructing a giant prestressed ring beam based on simulation technology. Background Art

[0002] The cross section of the large-section prestressed ring beam of a gymnasium is a parallelogram with a size of 6.3m×4.3m. The ring beam is a perfect circle with a diameter of 130 and an outer diameter of 432 meters. The steel bars at the beam-column nodes are dense and complex, and the ring beams, columns, roof cross beams, and prestressed steel strand pipes are interspersed at the same time. The main features are as follows: Its internal reinforcement: column top and beam longitudinal reinforcement ф36, outer stirrup ф25, inner stirrup and hook ф20, longitudinal distribution reinforcement in beam ф16; Prestressed tendons are interspersed inside: the ring beam is divided into 12 sections through 12 post-casting strips, and each section has 47 prestressed strands, including 35 1-10HøS21.6 strands and 12 1-9HøS21.6 strands; each post-casting strip area has 46 prestressed steel strands; The ring beam formwork has a large unfolding area: the bottom formwork is 2591㎡, the outer formwork is 2320㎡, the inner formwork is 2036㎡, and the total area is 6947㎡.

[0003] The ring beam supports the entire weight of the components and roof in the upper structure of the building, bears the vertical load and the horizontal load caused by the load of the upper structure, and is the most important part of the upper structure of the building.

[0004] For the above large and complex core structures, there are many difficulties in the construction process: the ring beam is cast with C50 grade strength concrete, and the cross-sectional dimensions of the ring beam structure are large, which is a large-volume concrete structure. The heat inside the poured concrete is difficult to release, resulting in a large temperature difference between the inner and outer surfaces of the concrete, with a high risk of cracking, so the mix ratio of concrete has become the key and also the difficulty; pouring and quality control are difficult, and the special-shaped components such as the circular plane shape of the ring beam and the arc shape on the inside are difficult to form in one go; therefore, this new pouring method is proposed to improve the pouring performance and molding effect of concrete and ensure the pouring quality of concrete. Summary of the invention

[0005] The purpose of the present invention is to provide a concrete pouring method, so as to solve the problem that in building structures such as large venues, prestressed ring beams with large cross-sections are large in cross-section and the steel bars are too dense, making it difficult to pour and control the construction quality.

[0006] In order to achieve the above object, the present invention is achieved in the following ways: A method for constructing a giant prestressed ring beam based on simulation technology at least includes the steps of relying on BIM technology to conduct overall analysis and deepen complex nodes, and propose a three-dimensional steel bar lofting rule for complex special-shaped spatial structural components; the steps of conducting three-dimensional disclosure and estimating the engineering quantity, and establishing a steel bar BIM model: the process of establishing a BIM model, simulating the process of steel bar binding, the sequential steps of steel bar binding and formwork, and guiding on-site workers in construction.

[0007] The method for constructing a giant prestressed ring beam based on simulation technology specifically includes: Step 1: According to the characteristics and overlap relationship of the ring beam structure, the ring beam structure is segmented and post-casting strips are set. There are 12 post-casting strips in total. The site is divided into 4 flow sections for simultaneous construction. Each construction flow section has 3 post-casting strips, which are constructed from the northwest and southeast directions to both sides, so as to achieve the effect of on-site material turnover; Step 2: Deepen the construction process based on BIM technology: Step 2.1, model creation; Step 2.2, overall analysis and deepening of complex nodes: Based on parametric technology, establish the three-dimensional steel bar layout rules for complex and special-shaped spatial structural components. Read the spatial form of the component through the model, parameterize the control of the component steel bar layout principles and layout sections, realize spatial multi-form precise layout, and optimize the steel bars to propose a more reasonable steel bar layout plan; Step 2.3: Conduct 3D briefing and estimate the engineering quantity: For the key node and complex area of ​​the ring beam, BIM technology was used to conduct construction simulation preview before construction, clarify the practice of each process, calculate the amount of work required for each construction, and guide the on-site construction through the three-dimensional model; Step 2.4, establish a steel bar BIM model: The BIM model is established to simulate the steel bar binding process and the steps of steel bar binding and formwork support, so as to guide the on-site workers in construction; Step 3: Build the support system: The bottom formwork and inner side formwork of the ring beam adopt a combined steel formwork system to improve the bearing capacity; the outer side adopts a wooden formwork system to ensure that the formwork can be turned around; the support system of the bottom formwork adopts a formwork support system of a tire frame + I-beam platform; the support system of the side formwork adopts a steel truss + steel section; Step 4: Steel bar installation; Step 5: Concrete pouring.

[0008] In the above-mentioned method for constructing a giant prestressed ring beam based on simulation technology, in step 4, the order of installing the ring beam reinforcement is: Step 4.1, install the U-shaped steel hoop; Step 4.2, the first row of main reinforcement at the bottom; Step 4.2, erect the pad; Step 4.3, the second row of main reinforcement and the first layer of horizontal hooks at the bottom; Step 4.4, install the first layer of fixing frame; Step 4.5: Install the bottom steel strand, longitudinal reinforcement on both sides, horizontal hooks, and longitudinal and horizontal structural reinforcement; Step 4.6, install the second layer of fixing frame; Step 4.7, install the steel strands, install the longitudinal reinforcement on both sides, the horizontal hooks, and the longitudinal and horizontal structural reinforcement; Step 4.8, install the fixing frame and scissor brace layer by layer, install the steel strand, install the longitudinal reinforcement on both sides, horizontal hooks, and longitudinal and horizontal structural reinforcement; Step 4.9, the last layer of fixed frame; Step 4.10: Install the steel strands and the first row of longitudinal reinforcements; Step 4.11, erect the pad; Step 4.12, the second row of main reinforcement in the upper part.

[0009] In the above-mentioned method for constructing a giant prestressed ring beam based on simulation technology, in step 5, a concrete discharge port is opened at intervals of 1500mm from top to bottom in the steel bar shape after binding, and a concrete chute is arranged at intervals in the middle of the ring beam during construction. The concrete chute is divided into two sections. In the first section, the square tube is pre-buried obliquely in the middle of the steel bar along the angle of the steel bar while the steel bar is being bound. The second section of the square tube is made into a trumpet chute at the top, which is connected to the upper part of the first section of the chute when pouring concrete, so as to ensure smooth flow of concrete.

[0010] Furthermore, when pouring concrete, it is carried out in layers and simultaneously, and a number of vibrating rods are provided for vibrating.

[0011] The giant prestressed ring beam construction method based on simulation technology proposed in the present invention solves the problem that large-section prestressed ring beams in building structures such as large stadiums have large cross-section dimensions and dense steel bars, making them difficult to cast and difficult to control construction quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a schematic diagram of sections of the ring beam shown in the present invention.

[0013] Figure 2 It is a cross-sectional view of the ring beam shown in the present invention.

[0014] Figure 3 It is a schematic diagram of the steel bar installation of the ring beam shown in the present invention.

[0015] Figure 4 It is a BIM simulation diagram during the implementation of the present invention. DETAILED DESCRIPTION

[0016] The technical solutions of the embodiments of the present application will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. All other embodiments obtained by ordinary technicians in this field without creative work based on the embodiments in the embodiments of the present application are within the scope of protection requested by the present application.

[0017] like Figure 1 to Figure 4 A method for constructing a giant prestressed ring beam based on simulation technology at least includes the steps of relying on BIM technology to analyze the whole and deepen the complex nodes, and propose a three-dimensional steel bar layout rule for complex special-shaped spatial structural components; the steps of conducting three-dimensional briefing and estimating the engineering quantity, and establishing a steel bar BIM model: the process of establishing a BIM model, simulating the process of steel bar binding, the steps of steel bar binding and formwork support, and guiding the construction of on-site workers.

[0018] The method for constructing a giant prestressed ring beam based on simulation technology specifically includes: Step 1: According to the characteristics and overlap relationship of the ring beam structure, the ring beam structure is segmented and post-casting strips are set. There are 12 post-casting strips in total. The site is divided into 4 flow sections for simultaneous construction. Each construction flow section has 3 post-casting strips, which are constructed from the northwest and southeast directions to both sides, so as to achieve the effect of on-site material turnover; Step 2: Deepen the construction process based on BIM technology: Step 2.1, model creation; Step 2.2, overall analysis and deepening of complex nodes: Based on parametric technology, establish the three-dimensional steel bar layout rules for complex and special-shaped spatial structural components. Read the spatial form of the component through the model, parameterize the control of the component steel bar layout principles and layout sections, realize spatial multi-form precise layout, and optimize the steel bars to propose a more reasonable steel bar layout plan; Step 2.3: Conduct 3D briefing and estimate the engineering quantity: For the key node and complex area of ​​the ring beam, BIM technology was used to conduct construction simulation preview before construction, clarify the practice of each process, calculate the amount of work required for each construction, and guide the on-site construction through the three-dimensional model; Step 2.4, establish a steel bar BIM model: The BIM model is established to simulate the steel bar binding process and the steps of steel bar binding and formwork support, so as to guide the on-site workers in construction; Step 3: Build the support system: The bottom formwork and inner side formwork of the ring beam adopt a combined steel formwork system to improve the bearing capacity; the outer side adopts a wooden formwork system to ensure that the formwork can be turned around; the support system of the bottom formwork adopts a formwork support system of a tire frame + I-beam platform; the support system of the side formwork adopts a steel truss + steel section; Step 4: Steel bar installation; Step 5: Concrete pouring.

[0019] In the above-mentioned method for constructing a giant prestressed ring beam based on simulation technology, in step 4, the order of installing the ring beam reinforcement is: Step 4.1, install the U-shaped steel hoop; Step 4.2, the first row of main reinforcement at the bottom; Step 4.2, erect the pad; Step 4.3, the second row of main reinforcement and the first layer of horizontal hooks at the bottom; Step 4.4, install the first layer of fixing frame; Step 4.5: Install the bottom steel strand, longitudinal reinforcement on both sides, horizontal hooks, and longitudinal and horizontal structural reinforcement; Step 4.6, install the second layer of fixing frame; Step 4.7, install the steel strands, longitudinal reinforcement on both sides, horizontal hooks, and longitudinal and horizontal structural reinforcement; Step 4.8, install the fixing frame and scissor brace layer by layer, install the steel strand, install the longitudinal reinforcement on both sides, horizontal hooks, and longitudinal and horizontal structural reinforcement; Step 4.9, the last layer of fixed frame; Step 4.10: Install the steel strands and the first row of longitudinal reinforcements on the upper part; Step 4.11, erect the pad; Step 4.12, the second row of main reinforcement in the upper part.

[0020] In the above-mentioned method for constructing a giant prestressed ring beam based on simulation technology, in step 5, a concrete discharge port is opened at intervals of 1500mm from top to bottom in the steel bar shape after binding, and a concrete chute is arranged at intervals in the middle of the ring beam during construction. The concrete chute is divided into two sections. In the first section, the square tube is pre-buried obliquely in the middle of the steel bar along the angle of the steel bar while the steel bar is being bound. The second section of the square tube is made into a trumpet chute at the top, which is connected to the upper part of the first section of the chute when pouring concrete, so as to ensure smooth flow of concrete.

[0021] Furthermore, when pouring concrete, it is carried out in layers and simultaneously, and a number of vibrating rods are provided for vibrating.

[0022] The giant prestressed ring beam construction method based on simulation technology proposed in the present invention solves the problem that large-section prestressed ring beams in building structures such as large stadiums have large cross-section dimensions and dense steel bars, making them difficult to cast and difficult to control construction quality.

[0023] The above are only embodiments provided for the present application and are not intended to limit the present application. Although the present application is described in detail with reference to the embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or make equivalent substitutions for some of the technical features therein. However, any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present application should be included in the protection scope of the present application.

Claims

1. A method for constructing a giant prestressed ring beam based on simulation technology, characterized in that: At least it includes the steps of overall analysis and deepening of complex nodes based on BIM technology, proposing a three-dimensional layout rule for steel bars of complex and special-shaped spatial structural components; conducting three-dimensional briefing and estimating the engineering quantity, and establishing a steel bar BIM model: the process of establishing a BIM model, simulating the process of steel bar binding, the sequence of steel bar binding and formwork, and guiding on-site workers in construction.

2. The method for constructing a giant prestressed ring beam based on simulation technology according to claim 1 is characterized in that: The method specifically comprises Step 1: According to the characteristics and overlap relationship of the ring beam structure, the ring beam structure is segmented and post-casting strips are set. There are 12 post-casting strips in total. The site is divided into 4 flow sections for simultaneous construction. Each construction flow section has 3 post-casting strips, which are constructed from the northwest and southeast directions to both sides, so as to achieve the effect of on-site material turnover; Step 2: Deepen the construction process based on BIM technology: Step 2.1, model creation; Step 2.2, overall analysis and deepening of complex nodes: Based on parametric technology, establish the three-dimensional steel bar layout rules for complex and special-shaped spatial structural components. Read the spatial form of the component through the model, parameterize the control of the component steel bar layout principles and layout sections, realize spatial multi-form precise layout, and optimize the steel bars to propose a more reasonable steel bar layout plan; Step 2.3: Conduct 3D briefing and estimate the engineering quantity: For the key node and complex area of ​​the ring beam, BIM technology was used to conduct construction simulation preview before construction, clarify the practice of each process, calculate the amount of work required for each construction, and guide the on-site construction through the three-dimensional model; Step 2.4, establish a steel bar BIM model: The BIM model is established to simulate the steel bar binding process and the steps of steel bar binding and formwork support, so as to guide the on-site workers in construction; Step 3: Build the support system: The bottom formwork and inner side formwork of the ring beam adopt a combined steel formwork system to improve the bearing capacity; the outer side adopts a wooden formwork system to ensure that the formwork can be turned around; the support system of the bottom formwork adopts a formwork support system of a tire frame + I-beam platform; the support system of the side formwork adopts a steel truss + steel section; Step 4: Steel bar installation; Step 5: Concrete pouring.

3. The method for constructing a giant prestressed ring beam based on simulation technology according to claim 2 is characterized in that: In step 4, the order of installing the ring beam reinforcement is: Step 4.1, install the U-shaped steel hoop; Step 4.2, the first row of main reinforcement at the bottom; Step 4.2, erect the pad; Step 4.3, the second row of main reinforcement and the first layer of horizontal hooks at the bottom; Step 4.4, install the first layer of fixing frame; Step 4.5: Install the bottom steel strand, longitudinal reinforcement on both sides, horizontal hooks, and longitudinal and horizontal structural reinforcement; Step 4.6, install the second layer of fixing frame; Step 4.7, install the steel strands, longitudinal reinforcement on both sides, horizontal hooks, and longitudinal and horizontal structural reinforcement; Step 4.8, install the fixing frame and scissor brace layer by layer, install the steel strand, install the longitudinal reinforcement on both sides, horizontal hooks, and longitudinal and horizontal structural reinforcement; Step 4.9, the last layer of fixed frame; Step 4.10: Install the steel strands and the first row of longitudinal reinforcements on the upper part; Step 4.11, erect the pad; Step 4.12, the second row of main reinforcement in the upper part.

4. The method for constructing a giant prestressed ring beam based on simulation technology according to claim 2 is characterized in that: In step 5, in the steel bar shape after binding, a concrete discharge port is opened at intervals of 1500mm from top to bottom, and a concrete chute is set at intervals in the middle of the ring beam during construction. The concrete chute is divided into two sections. In the first section, the square tube is pre-buried obliquely in the middle of the steel bar along the angle of the steel bar while the steel bar is being bound. The second section of the square tube is made into a trumpet chute at the top, which is connected to the upper part of the first section of the chute when pouring concrete, so as to ensure smooth flow of concrete.

5. The method for constructing a giant prestressed ring beam based on simulation technology according to claim 2 or 4 is characterized in that: When pouring concrete, it is done in layers and simultaneously, and several vibrating rods are set up for vibrating.

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