Construction method of mega prestressed ring beam based on simulation technology

Abstract

A kind of construction method of giant prestressed ring beam based on simulation technology, at least including relying on BIM technology to whole analysis and complex node deepening, a kind of reinforcing steel bar three-dimensional lofting rule step of complex special-shaped space structure form component is proposed;The steps of three-dimensional disclosure and estimating engineering quantity, establish reinforcing steel bar BIM model;BIM model is established in process, the process of simulating reinforcing steel bar binding, reinforcing steel bar binding and the steps of formwork, guide the steps of construction of on-site worker.The present application is used to solve the problems of large section size prestressed ring beam in large-scale stadium and other building structures, such as large section size, dense reinforcing steel bar, which is difficult to pour and difficult to control construction quality.

Description

TECHNICAL FIELD

[0001] The present application relates to the construction technology field of concrete buildings, in particular to a construction method of a giant prestressed ring beam based on simulation technology. BACKGROUND

[0002] The section of a certain gymnasium large-section-size prestressed ring beam is a parallelogram with a size of 6.3m*4.3m, the ring beam is a right circular shape with a diameter of 130, and the outer diameter length is as long as 432m; the beam-column joint steel is dense, complex and staggered, and is inserted into the ring beam, column, roof cross beam and prestressed steel strand pipe; the main manifestations are as follows:

[0003] The internal steel: column top and longitudinal steel of the beam ф36, outer stirrup ф25, inner stirrup and pull hook ф20, and longitudinal distribution steel of the beam ф16;

[0004] The internal inserted prestressed steel: the ring beam is divided into 12 sections through 12 post-cast belts, and each section has a total of 47 prestressed groups, which are 35 1-10HøS21.6 groups and 12 1-9HøS21.6 groups; each post-cast belt area has 46 prestressed steel strands;

[0005] The ring beam has a large formwork spreading area: the bottom formwork is 2591㎡, the outer side formwork is 2320㎡, the inner side formwork is 2036㎡, and the total is 6947㎡.

[0006] The ring beam bears the weight of all components in the upper frame of the building and the entire weight of the roof, bears the vertical load and the horizontal load generated by the load of the upper structure, and is the most important part in the upper frame of the building.

[0007] For the above large and complex core structure, there are many difficulties in the construction process: the ring beam is poured with C50 grade strength concrete, and the ring beam structure section size is large, which is a mass concrete structure. The heat release inside the poured concrete is difficult, resulting in a large temperature difference between the inside and the surface of the concrete, and a high risk of cracking, so the mix proportion of the concrete becomes the key and the difficulty; the pouring and quality control are difficult, the ring beam is a circular plane shape, the inner side is arc-shaped and other special-shaped components are difficult to form at one time; therefore, this new pouring method is proposed to improve the pouring performance and forming effect of the concrete and ensure the pouring quality of the concrete. SUMMARY

[0008] The purpose of the present application is to provide a concrete pouring method, thereby solving the problem of large-section-size prestressed ring beam section size, dense steel and difficult pouring and construction quality control in large gymnasium building structures.

[0009] In order to achieve the above purpose, the present application is implemented as follows:

[0010] A kind of construction method of giant prestressed ring beam based on simulation technology, at least including overall analysis and complex node deepening based on BIM technology, a kind of reinforcing steel three-dimensional lofting rule step of complex special-shaped space structure form component is proposed;The steps of three-dimensional disclosure and estimating the quantity of work are carried out, and the reinforcing steel BIM model is established: process establishes BIM model, simulates the process of reinforcing steel binding, the steps of reinforcing steel binding and formwork, guides the steps of on-site worker construction.

[0011] The construction method of giant prestressed ring beam based on simulation technology, the method specifically includes

[0012] Step 1, according to the characteristics of ring beam structure, lap relationship, the ring beam structure is segmented and the post-cast strip is set, the post-cast strip is divided into 12, which is divided into 4 flow sections at the same time, each construction flow section is 3 post-cast strips, respectively from the northwest direction and the southeast direction to the two sides Flow construction is carried out to achieve the effect of on-site material turnover;

[0013] Step 2, deepening construction process based on BIM technology:

[0014] Step 2.1, model creation;

[0015] Step 2.2, overall analysis and complex node deepening: based on parameterization technology, the reinforcing steel three-dimensional lofting rule of complex special-shaped space structure form component is established, the space form of component is read through model, the parameterization control component reinforcing steel arrangement principle, lofting section, realize the accurate lofting of space multi-form, and also optimize the reinforcing steel, propose more reasonable reinforcing steel arrangement scheme;

[0016] Step 2.3, three-dimensional disclosure and estimating the quantity of work:

[0017] For the key node and complex area of ring beam, BIM technology is used for construction simulation before construction, the method of each process is clear, and the required quantity of work is calculated, and the construction of the scene is guided by the three-dimensional model;

[0018] Step 2.4, establish reinforcing steel BIM model: process establishes BIM model, simulates the process of reinforcing steel binding, the steps of reinforcing steel binding and formwork, in order to guide on-site worker construction;

[0019] Step 3, build support system: ring beam bottom mold, inner side mold adopts combined steel mold system, improves bearing capacity;The outer side adopts wood mold system, ensures that the formwork can be recycled;The support system of bottom mold adopts cradle + I-beam platform to set up formwork support system;The support system of side mold adopts the form of steel truss + profile steel;

[0020] Step 4, reinforcing steel installation;

[0021] Step 5, concrete pouring.

[0022] The above-mentioned construction method of the mega pre-stressed ring beam based on simulation technology, in step 4, the ring beam reinforcement installation sequence is as follows:

[0023] Step 4.1, install U-shaped steel hoops;

[0024] Step 4.2, bottom first row of main reinforcement;

[0025] Step 4.2, erect the pad iron;

[0026] Step 4.3, bottom second row of main reinforcement and first layer of horizontal draw hook;

[0027] Step 4.4, install the first layer of fixing frame;

[0028] Step 4.5, install the bottom steel strand, install the two sides of longitudinal reinforcement, horizontal draw hook, and longitudinal horizontal structural reinforcement;

[0029] Step 4.6, install the second layer of fixing frame;

[0030] Step 4.7, install the steel strand, install the two sides of longitudinal reinforcement, horizontal draw hook, and longitudinal horizontal structural reinforcement;

[0031] Step 4.8, layer by layer upward installation, fixing frame and scissors support, installation of steel strand, installation of two sides of longitudinal reinforcement, horizontal draw hook, and longitudinal horizontal structural reinforcement;

[0032] Step 4.9, the last layer of fixing frame;

[0033] Step 4.10, install the steel strand, install the upper first row of longitudinal reinforcement;

[0034] Step 4.11, erect the pad iron;

[0035] Step 4.12, upper second row of main reinforcement.

[0036] The above-mentioned construction method of the mega pre-stressed ring beam based on simulation technology, in step 5, in the completed steel reinforcement modeling, a concrete discharge port is opened every 1500mm from top to bottom, and a concrete chute is set in the middle of the ring beam during construction, the concrete chute is divided into two sections, the first section is pre-buried into the middle of the steel reinforcement along the angle of the steel reinforcement at the same time of steel reinforcement binding, and the second section is a trumpet chute at the top, which is connected to the upper part of the first section chute during concrete pouring, so as to ensure the smooth flow of concrete.

[0037] Further, during concrete pouring, the layered and simultaneous pouring method is adopted, and a plurality of vibrating rods are set to vibrate.

[0038] The building method of the giant prestressed ring beam based on the simulation technology solves the problems of large cross-section size, dense reinforcement, difficult pouring and difficult construction quality control of the large cross-section size prestressed ring beam in large venue and other building structures. BRIEF DESCRIPTION OF DRAWINGS

[0039] Fig. 1 The figure is a segmented schematic diagram of the ring beam.

[0040] Fig. 2 The figure is a sectional view of the ring beam.

[0041] Fig. 3 The figure is a reinforcement installation schematic diagram of the ring beam.

[0042] Fig. 4 The figure is a BIM simulation diagram in the implementation process of the application. DETAILED DESCRIPTION

[0043] The technical solutions of the embodiments of the application will be described clearly and completely below with reference to the drawings. Obviously, the described embodiments are part of the embodiments of the application, rather than all the embodiments of the application. Based on the embodiments in the application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of the application.

[0044] As Figs. 1-4 The building method of the giant prestressed ring beam based on the simulation technology comprises the following steps: relying on BIM technology to analyze the whole and deepen the complex node, proposing a step of a reinforcement three-dimensional lofting rule of a complex special-shaped space structure form component; performing three-dimensional explanation and estimating the engineering quantity, establishing a reinforcement BIM model; establishing a BIM model, simulating the process of reinforcement binding, the sequence of reinforcement binding and formwork erection, and guiding the construction of the workers on site.

[0045] The building method of the giant prestressed ring beam based on the simulation technology comprises the following steps:

[0046] Step 1: According to the characteristics and lap joint relationship of the ring beam structure, the ring beam structure is segmented and a post-cast strip is arranged, the post-cast strip is totally divided into 12 sections, and the post-cast strip is divided into four flow sections for simultaneous construction on site, each flow section is three post-cast strips, and the flow construction is performed from the northwest direction and the southeast direction to the two sides, so as to achieve the effect of material turnover on site.

[0047] Step 2: Deepening the construction process relying on BIM technology:

[0048] Step 2.1: Model creation;

[0049] Step 2.2, overall analysis and complex node deepening: based on the parameterization technology, the rules of three-dimensional lofting of reinforcement of complex special-shaped space structure form members are established, the space form of members is read through the model, the principle of reinforcement arrangement and lofting section are parameterized controlled, the accurate lofting of space multi-form is realized, and the reinforcement is also optimized, and a more reasonable reinforcement arrangement scheme is proposed;

[0050] Step 2.3, three-dimensional explanation and estimated engineering quantity:

[0051] For the key node and complex area of the ring beam, BIM technology is used for construction simulation and rehearsal before construction, the method of each process is clarified, and the engineering quantity required for each construction is calculated, and the three-dimensional model is used to guide the construction on site;

[0052] Step 2.4, establishing a reinforcement BIM model: the process of establishing a BIM model simulates the process of reinforcement binding and the sequence of reinforcement binding and formwork, so as to guide the construction of workers on site;

[0053] Step 3, building a support system: the bottom form and the inner side form of the ring beam adopt a combined steel formwork system to improve the bearing capacity; the outer side adopts a wood formwork system to ensure the turnover of the formwork; the support system of the bottom form adopts a cradle + I-beam platform to set up a formwork support system; the support system of the side form adopts a steel truss + section steel form;

[0054] Step 4, reinforcement installation;

[0055] Step 5, concrete pouring.

[0056] The above-mentioned construction method of the giant prestressed ring beam based on simulation technology is as follows:

[0057] Step 4.1, installing U-shaped steel hoops;

[0058] Step 4.2, installing the first row of main reinforcement at the bottom;

[0059] Step 4.2, erecting a pad iron;

[0060] Step 4.3, installing the second row of main reinforcement at the bottom and the first layer of horizontal draw hooks;

[0061] Step 4.4, installing the first layer of fixed frame;

[0062] Step 4.5, installing the bottom steel strand, installing the longitudinal reinforcement, horizontal draw hooks and longitudinal horizontal structural reinforcement on both sides;

[0063] Step 4.6, installing the second layer of fixed frame;

[0064] Step 4.7, installing the steel strand, installing the longitudinal reinforcement, horizontal draw hooks and longitudinal horizontal structural reinforcement on both sides;

[0065] Step 4.8, install, fix the frame and scissors props, install steel strand, install longitudinal bars on both sides, horizontal pull hook, longitudinal horizontal construction bar;

[0066] Step 4.9, the last layer of the frame;

[0067] Step 4.10, install steel strand, install the first row of longitudinal bars on the upper part;

[0068] Step 4.11, erect the pad iron;

[0069] Step 4.12, the second row of main bars on the upper part.

[0070] The above-mentioned construction method of the giant prestressed ring beam based on simulation technology, in step 5, a concrete discharge port is opened in the completed steel bar modeling at intervals of 1500mm from top to bottom, and a concrete chute is arranged in the middle of the ring beam during construction, the concrete chute is divided into two sections, the first section is pre-buried into the middle of the steel bar along the angle of the steel bar at the same time of steel bar binding, and the second section is a trumpet chute at the top, which is connected to the upper part of the first section chute during concrete pouring, so as to ensure the smooth flow of concrete.

[0071] Further, during concrete pouring, the layered and simultaneous pouring mode is adopted, and a plurality of vibrating rods are arranged for vibration.

[0072] The above-mentioned construction method of the giant prestressed ring beam based on simulation technology solves the problems of large cross-section size prestressed ring beam in large-scale building structures, such as large cross-section size, dense steel bars, difficult pouring and difficult control of construction quality.

[0073] The above is only an embodiment provided by the present application, and is not used to limit the present application, although the present application is described in detail with reference to the embodiment, for those skilled in the art, the technical solutions recorded in the foregoing embodiment can be modified, or some technical features can be replaced, but any modification, equivalent replacement, improvement, etc. within the spirit and principle 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 by: include Step 1: Based on the characteristics and overlapping relationship of the ring beam structure, the ring beam structure is divided into segments and post-pouring strips are set. There are a total of 12 post-pouring strips. The site is divided into 4 flow sections for simultaneous construction. Each construction flow section has 3 post-pouring strips. The flow construction is carried out from the northwest and southeast directions to both sides to achieve the effect of material turnover on site. Step 2: Refine the construction process using BIM technology: Step 2.1, Model Creation; Step 2.2, Overall Analysis and Complex Node Refinement: Based on parametric technology, establish three-dimensional reinforcement layout rules for complex irregular spatial structural components. Read the spatial shape of the component through the model, parametrically control the reinforcement layout principle of the component, layout sections, realize accurate layout of multiple spatial shapes, and optimize the reinforcement to propose a more reasonable reinforcement layout scheme. Step 2.3: Conduct three-dimensional briefing and estimate project quantities: For the key node and complex area of ​​the ring beam, BIM technology was used to conduct construction simulation and pre-construction, clarify the methods of each process and 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 BIM model for the reinforcing bars: The process involves establishing a BIM model to simulate the process of reinforcing bar tying, including the sequence of reinforcing bar tying and formwork erection, in order to guide on-site workers during construction. Step 3: Constructing the support system: The bottom formwork and inner side formwork of the ring beam adopt a combined steel formwork system to improve the load-bearing capacity; the outer side adopts a wooden formwork system to ensure that the formwork can be reused; the support system of the bottom formwork adopts a formwork support system erected by a jig + I-beam platform; the support system of the side formwork adopts the form of steel truss + steel section. Step 4: Reinforcing steel installation; Step 4.1: Install the U-shaped steel hoop; Step 4.2, the first row of main reinforcement bars at the bottom; Step 4.3: Install shims; Step 4.4: The second row of main reinforcing bars at the bottom and the first layer of horizontal tie bars; Step 4.5: Install the first layer of the fixing frame; Step 4.6: Install the bottom steel strands, and install the longitudinal bars on both sides, horizontal hooks, and longitudinal horizontal structural bars; Step 4.7: Install the second layer of fixing frame; Step 4.8: Install the steel strands, and install the longitudinal bars on both sides, horizontal hooks, and longitudinal horizontal structural bars; Step 4.9: Install the fixing frame and scissor bracing layer by layer upwards, install the steel strands, install the longitudinal bars on both sides, horizontal hooks and longitudinal horizontal structural bars; Step 4.10, the last layer of fixing frame; Step 4.11: Install the steel strands and install the first row of upper longitudinal reinforcement bars; Step 4.12: Install shims; Step 4.13, the second row of main reinforcement bars at the top; Step 5: Concrete pouring.

2. The method for constructing a giant prestressed ring beam based on simulation technology according to claim 1, characterized in that: In step 5, a concrete discharge port is opened at 1500mm intervals from top to bottom in the completed rebar shape. During construction, concrete chutes are set at intervals in the middle of the ring beam. The concrete chutes are divided into two sections. The first section is pre-embedded in the middle of the rebar at an angle along the rebar while the rebar is being tied. The second section is a flared chute at the top, which is connected to the upper part of the first chute when the concrete is poured, so as to ensure the smooth flow of concrete.

3. The method for constructing a giant prestressed ring beam based on simulation technology according to claim 1 or 2, characterized in that: When pouring concrete, it is done in layers and simultaneously, and several vibrators are set up at the same time to vibrate it.

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