CN115952589B - Ring beam node BIM auxiliary construction method capable of avoiding concrete pouring blocking - Google Patents
Ring beam node BIM auxiliary construction method capable of avoiding concrete pouring blocking Download PDFInfo
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- CN115952589B CN115952589B CN202310239645.XA CN202310239645A CN115952589B CN 115952589 B CN115952589 B CN 115952589B CN 202310239645 A CN202310239645 A CN 202310239645A CN 115952589 B CN115952589 B CN 115952589B
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/91—Use of waste materials as fillers for mortars or concrete
Abstract
The invention relates to the technical field of computer aided design, and discloses a ring beam node BIM aided construction method capable of avoiding concrete pouring blocking. The casting process of the concrete is simulated by making the animation, and the flow of the concrete in the reinforcement cage and the interaction between the coarse aggregate and the reinforcement cage are simulated in the animation production process, so that the distribution condition of the coarse aggregate after the concrete is cast is solved, and the segregation caused by the blocking of the flow of the coarse aggregate during casting can be avoided by adjusting the binding density of the reinforcement and/or the grading of the concrete aggregate according to the simulation result.
Description
Technical Field
The invention relates to the technical field of computer aided design, in particular to a ring beam node BIM aided construction method capable of avoiding concrete pouring blocking.
Background
The connection position of the steel column (comprising the section steel column, the steel pipe column and the steel pipe concrete column) and the reinforced concrete beam is quite special, and the steel column (comprising the section steel column, the steel pipe column and the steel pipe concrete column) cannot be directly poured into a whole like the reinforced concrete beam and the reinforced concrete column, but the beam column connection is completed by means of a more complex ring beam.
In the ring beam node, the steel reinforcement cage of the ring beam is welded to the steel column through the steel corbel, the main reinforcement of the reinforced concrete beam to be connected passes through the ring beam and is welded to the steel column or inserted into the steel column, and meanwhile, the concrete of the ring beam and the concrete of the reinforced concrete beam to be connected are poured into a whole.
Because the atress is concentrated relatively, therefore the steel bar ligature density of ring beam is very big (the net of steel reinforcement cage is difficult to pack into even a fist), and the reinforcement rate is high, and the coarse aggregate particle diameter of the concrete of adoption is big (in order to guarantee concrete strength), and these characteristics have brought the problem in two aspects for the concrete placement of ring beam:
1. during practical construction, the reinforcement cage of the ring beam is slightly larger than the reinforcement cage in design after binding, so that the reinforcement protection layer (namely, the thickness of concrete outside the reinforcement is insufficient) is insufficient, even the reinforcement is exposed out of the concrete, and the concrete template cannot be folded.
Binding of the reinforcement cage is conducted under the guidance of construction drawings, whether hand drawing or software drawing is conducted, the reinforcement is generally drawn on the drawings in a line mode, and interference problems are not considered. In actual construction, because the binding density of the reinforcing bars is high, the distance between two adjacent reinforcing bars is very small, the interference caused by the bound reinforcing bars to the hands of constructors, binding tools and the next reinforcing bar to be bound is very serious, so that the distance between the adjacent reinforcing bars is usually larger than the design value (because a plurality of places can be smoothly bound on the drawing, the distance between the reinforcing bars is required to be slightly larger than the design during actual binding, and all collisions and disturbance tend to enlarge the distance).
2. In practical construction, the reinforcement cage grid (very small) of the ring beam sometimes prevents coarse aggregate (generally larger than conventional coarse aggregate) of concrete from passing through, so that the coarse aggregate cannot be uniformly distributed after concrete pouring, and the strength of the concrete is seriously affected.
Note that the reinforcement cage mesh herein prevents the coarse aggregate of concrete from passing through, and does not mean that the coarse aggregate is larger than the reinforcement cage mesh (the designer does not make an obvious error of making the coarse aggregate larger than the reinforcement cage mesh), but means that the coarse aggregate collides with the reinforcement cage mesh and is blocked when the concrete flows (the smaller the mesh is, the more coarse aggregate collides with), and the flowing is delayed from other components of the concrete, so that the coarse aggregate is concentrated in a region where the concrete falls, and is piled into a cone-shaped structure, and the fine aggregate and cement paste are piled outside the cone, namely, the concrete segregation occurs.
Disclosure of Invention
The invention provides a ring beam node BIM auxiliary construction method capable of avoiding concrete pouring blocking.
The technical problems to be solved are as follows: the steel reinforcement cage of the ring beam is larger than the steel reinforcement cage of the ring beam after binding is completed, and the steel reinforcement cage grid of the ring beam can sometimes prevent coarse aggregate of concrete from passing through, so that the concrete pouring of the ring beam can not be smoothly carried out.
In order to solve the technical problems, the invention adopts the following technical scheme: a ring beam node BIM auxiliary construction method capable of avoiding concrete pouring blocking comprises the following steps:
step one: drawing a modeling reference base map;
step two: establishing a three-dimensional model;
step three: manufacturing a construction animation simulation ring beam node concrete pouring process on the basis of the three-dimensional model, and solving the distribution condition of coarse aggregate after concrete pouring;
step four: if the coarse aggregate is not uniformly distributed in the ring beam nodes after the concrete is poured in the third step, the reinforcement binding density and/or the concrete aggregate grading of the ring beam nodes in the model are adjusted on the premise of meeting the strength requirement, and then the animation of the pouring process of the concrete of the ring beam nodes is regenerated until the coarse aggregate is uniformly distributed in the ring beam nodes.
Further, the largest cross-sectional area of the single stirrup capable of being bound on site is recorded as A, in the fourth step, the following adjustment measures are used one by one according to the sequence, one adjustment measure is used next after reaching the limit of the adjustment range, and coarse aggregate is uniformly distributed in the ring beam nodes until the animation of the pouring process of the generated concrete:
adjustment measure 1: if the cross section area of the stirrup adopted by the current ring beam node is smaller than A, on the premise of not changing the reinforcement ratio, increasing the distance between the stirrups and simultaneously increasing the cross section area of a single stirrup;
adjusting measure 2: on the premise of meeting the strength requirement of the ring beam node, increasing the distance between stirrups;
adjusting measure 3: on the premise of meeting the strength requirement of the ring beam node, the particle size of the coarse aggregate is reduced, and the aggregate of the concrete is graded again.
In the third and fourth steps, the rest parts except the reinforcement cage of the ring beam and the outline of the ring beam are removed when the animation is made, and the cavity formed by the surrounding of the bottom surface, the outer side elevation and the inner side elevation of the ring beam is used for simulating the concrete pouring bin.
Further, the modeling reference base map in the first step only comprises the profiles of the steel bars, the beams and the columns.
Further, when the modeling reference base map in the first step is imported into the three-dimensional modeling software in the second step, the origin of coordinates of each component in the modeling reference base map is unified as one.
In the second step, modeling is performed on a plurality of section planes with the central axis of the column where the ring beam is located as the center, and then the section planes are combined into a whole, and the steel bars on each section plane are modeled according to the sequence of the main bar on the upper part of the ring beam, the main bar on the lower part of the ring beam, the waist bar of the ring beam and the hoop bar of the ring beam.
Furthermore, when modeling the steel bars on the cut-off face, the mode of making two steel bars bound together tangent or leaving a gap is used for avoiding the mold penetration, and after the mold is built, interference inspection is performed to find out the interfered graphic elements and eliminate the interference.
And further, after the modeling in the step two is completed, if the thickness of the reinforcement protection layer in the model is insufficient or reinforcement is exposed out of the concrete, the size of the reinforcement cage is adjusted, so that no reinforcement is exposed out of the concrete, and the thickness of the reinforcement protection layer is consistent with a design value.
And further, after the step four is completed, making animation for guiding constructors to bind the reinforcing steel bar binding process by using the adjusted model.
Further, video playing links of the animation of the reinforcement bar binding process are attached to a construction site in a two-dimensional code mode.
Compared with the prior art, the ring beam node BIM auxiliary construction method capable of avoiding concrete pouring blocking has the following beneficial effects:
according to the invention, the three-dimensional modeling of the steel bars of the ring beam is completed by placing the steel bar graphic elements according to the actual steel bar binding sequence without penetrating through the mould, the modeling process simulates the steel bar binding process, the problems in the steel bar binding process can be found in real time and corrected, the built model can be regarded as a steel bar cage (a bit larger than the design) for site binding, then the drawing can be deepened according to the position relation between the built model and the concrete, and the design of the steel bar cage is finely adjusted to avoid the influence of insufficient thickness of a steel bar protection layer or exposed steel bars on concrete pouring;
according to the invention, the pouring process of concrete is simulated by making the animation, wherein the flow of concrete in a reinforcement cage and the interaction of coarse aggregate and the reinforcement cage are simulated in the animation production process (in the three-dimensional animation production process, the animation production software can avoid penetrating a mould by virtue of collision detection, so that overlarge coarse aggregate cannot pass through a reinforcement cage grid), the distribution condition of the coarse aggregate after concrete pouring is obtained, and segregation caused by the blocking of the flow of the coarse aggregate in the concrete pouring process is avoided by adjusting the binding density of the reinforcement and/or the grading of the concrete aggregate, so that the coarse aggregate is uniformly distributed in the actual concrete pouring process, and the segregation caused by the fact that the coarse aggregate cannot smoothly flow is avoided.
Detailed Description
A ring beam node BIM auxiliary construction method capable of avoiding concrete pouring blocking comprises the following steps:
step one: drawing a modeling reference base map;
step two: establishing a three-dimensional model;
step three: manufacturing a construction animation simulation ring beam node concrete pouring process on the basis of the three-dimensional model, and solving the distribution condition of coarse aggregate after concrete pouring;
step four: if the coarse aggregate is not uniformly distributed in the ring beam nodes after the concrete is poured in the third step, the reinforcement binding density and/or the concrete aggregate grading of the ring beam nodes in the model are adjusted on the premise of meeting the strength requirement, and then the animation of the pouring process of the concrete of the ring beam nodes is regenerated until the coarse aggregate is uniformly distributed in the ring beam nodes.
In the embodiment, in the first step, an autocad software is adopted to draw a modeling reference base map; establishing a three-dimensional model by adopting a revit software; and thirdly, adopting navisworks software to manufacture construction animation on the basis of the three-dimensional model.
The largest cross-sectional area of a single stirrup which can be bound on site (the stirrup binding needs to be bent on site and cannot be too thick) is recorded as A, in the fourth step, the following adjustment measures are used one by one according to the sequence, one adjustment measure is used after reaching the limit of the adjustment range, and the next adjustment measure is used until coarse aggregate is uniformly distributed in ring beam nodes in the animation of the pouring process of the generated concrete.
The three adjustment measures are used in a grading manner, because the following three adjustment measures are superior and inferior, the adjustment measure 1 has no obvious influence on the strength, the strength accounting is not needed again, the adjustment measures 2 and 3 have obvious influence on the strength, the strength accounting is needed again, the adjustment measure 3 also needs to be subjected to grading again, and the calculated amount is larger.
Adjustment measure 1: if the cross section area of the stirrup adopted by the current ring beam node is smaller than A, on the premise of not changing the reinforcement ratio, increasing the distance between stirrups and simultaneously increasing the cross section area of a single stirrup (the cross section area of the stirrup after the increase is not larger than A); the A can be obtained by field test, namely, a constructor takes the field steel bars one by one to bend and bind, and the A is tested. In actual construction, the adjusting range of the adjusting measures is enough to meet the requirement, and the situation that the adjusting measures 2 and even the adjusting measures 3 are needed is not encountered at present.
Adjusting measure 2: on the premise that the strength requirement of the ring beam node can be met, the stirrup spacing is increased. The adjustment range of the adjustment measure is limited by the extra strength margin of the ring beam, because the designer usually leaves some extra strength margin for deepening the design in addition to the strength margin required in the design specification. Increasing the stirrup spacing, this additional strength margin is reduced, but still safe.
Adjusting measure 3: on the premise of meeting the strength requirement of the ring beam node, the particle size of the coarse aggregate is reduced, and the aggregate of the concrete is graded again. Similar to adjustment 2, the adjustment 3 is limited in terms of the additional strength margin of the ring beam, but adjustment 3 is not only computationally intensive but also profoundly effective, and besides quantitative changes in strength, there may be unexpected qualitative changes, so that it is not necessary to use them.
And step three and step four, removing the reinforcement cage of the ring beam and other parts except the outline of the ring beam when making the animation, and simulating a concrete pouring bin by using a cavity formed by the periphery of the bottom surface, the outer side elevation and the inner side elevation of the ring beam. The method is mainly used for reducing the simulation difficulty, the influence on the ring beam is two, namely, the main ribs of the beam are inserted into the ring beam and bound with some reinforcing steel bars in the ring beam, and the concrete of the ring beam flows out of the range of the ring beam to complete connection, but the two points have no obvious influence on whether coarse aggregate can smoothly pass through the grid of the reinforcement cage of the ring beam (the number of the main ribs extending into the ring beam is small and the main ribs of the ring beam are also attached, and meanwhile, the amount of the concrete of the ring beam flowing out of the range of the ring beam is small and the main flow direction of the concrete is not changed), but the calculation difficulty is obviously promoted, so that the calculation difficulty can be ignored when animation is produced.
When the model is imported into navisworks software to make animation, the animation is focused on the flowing of concrete in the reinforcement cage, so that the animation can be made from the time when the concrete falls into the reinforcement cage, and meanwhile, casting of all concrete is not required, and only the situation that the plane of the whole ring beam is fully spread or piled up after casting coarse aggregate is needed to be seen.
The modeling reference base diagram in the first step only comprises the profiles of the steel bars, the beams and the columns. All large figures are not included, and redundant lines are omitted so as to facilitate importing three-dimensional modeling software.
When the modeling reference base map of the first step is imported into the three-dimensional modeling software of the second step, the origin of coordinates of each component in the modeling reference base map is unified into one so that each department can cooperatively modify a model (such as a steel structure department). Coordinate conversion should be performed when necessary.
In the second step, modeling is respectively carried out on a plurality of section planes taking the central axis of the column where the ring beam is located as the center, and then the section planes are combined into a whole, and the steel bars on each section plane are modeled according to the sequence of the main bar on the upper part of the ring beam, the main bar on the lower part of the ring beam, the waist bar of the ring beam and the stirrup of the ring beam.
The modeling on the section plane is selected, so that the interference condition of the reinforcing steel bar is conveniently observed on the section plane, the modeling on the rest section planes can be completed in a rotating mode after the modeling is carried out on one section plane, and the modification is convenient. The modeling sequence is the steel bar binding sequence during actual construction, so that the simulation effect is achieved.
When modeling the steel bars on the cut-off face, the mode of making two steel bars bound together tangent or leaving a gap is used for avoiding the mold penetration, and after the mold is built, interference inspection is performed to find out the interfered graphic elements and eliminate the interference.
In the conventional three-dimensional modeling process, some invisible components cannot be influenced even though the steel bar is penetrated, but the process of binding the steel bars is simulated in the invention, and the phenomenon of penetrating the steel bar is not in the real world, so that the phenomenon must be avoided, two steel bars bound into the steel bar can be tangent, and a distance of about one millimeter can be reserved, and the two cases exist in the real steel bar binding, but the steel bar cannot be penetrated in any way. Note that the mesh size of the reinforcement cage is observed at any time during the modeling process, and if some meshes affect the actual reinforcement binding, the mesh size is adjusted (enlarged at any time). In particular, it can be determined empirically how the mesh affects the reinforcement binding, and if accurate determination is desired, a test can be performed, that is, a minimum mesh size and shape that can be successfully bound is tested.
And step two, after the modeling is completed, if the thickness of the reinforcement protection layer in the model is insufficient or reinforcement is exposed out of the concrete, the size of the reinforcement cage is adjusted, so that no reinforcement is exposed out of the concrete and the thickness of the reinforcement protection layer is consistent with a design value. The specific adjustment process can be realized by increasing or decreasing the usage amount of the reinforcing steel bars, adjusting the arrangement of the reinforcing steel bars and adjusting the length of a single reinforcing steel bar, and is not repeated here.
And step four, after the step four is completed, making animation for guiding constructors to bind the reinforcing steel bar binding process by using the adjusted model.
The adjusted reinforcement cage is not different from the reinforcement cage after actual binding, so that the reinforcement cage can be used for manufacturing reinforcement binding animation to assist constructors in reinforcement binding.
The video playing link of the animation in the reinforcement binding process is attached to a construction site in a two-dimensional code mode, so that constructors can watch the video conveniently at any time.
The above examples are only illustrative of the preferred embodiments of the present invention and are not intended to limit the scope of the present invention, and various modifications and improvements made by those skilled in the art to the technical solution of the present invention should fall within the scope of protection defined by the claims of the present invention without departing from the spirit of the present invention.
Claims (9)
1. A ring beam node BIM auxiliary construction method capable of avoiding concrete pouring blocking is characterized in that: the method comprises the following steps:
step one: drawing a modeling reference base map;
step two: establishing a three-dimensional model;
step three: manufacturing a construction animation simulation ring beam node concrete pouring process on the basis of the three-dimensional model, and solving the distribution condition of coarse aggregate after concrete pouring;
step four: if the coarse aggregate is not uniformly distributed in the ring beam nodes after the concrete is poured in the third step, the reinforcement binding density and/or the concrete aggregate gradation of the ring beam nodes in the model are adjusted on the premise of meeting the strength requirement, and then the animation of the pouring process of the concrete of the ring beam nodes is regenerated until the coarse aggregate is uniformly distributed in the ring beam nodes;
in the fourth step, the following adjustment measures are used one by one according to the sequence, and the next adjustment measure is used after the adjustment measure reaches the limit of the adjustment range until coarse aggregate is uniformly distributed in ring beam nodes in the animation of the pouring process of the generated concrete:
adjustment measure 1: if the cross section area of the stirrup adopted by the current ring beam node is smaller than A, on the premise of not changing the reinforcement ratio, increasing the distance between the stirrups and simultaneously increasing the cross section area of a single stirrup;
adjusting measure 2: on the premise of meeting the strength requirement of the ring beam node, increasing the distance between stirrups;
adjusting measure 3: on the premise of meeting the strength requirement of the ring beam node, the particle size of the coarse aggregate is reduced, and the aggregate of the concrete is graded again.
2. The ring beam node BIM auxiliary construction method capable of avoiding concrete pouring blockage according to claim 1, which is characterized in that: and step three and step four, removing the reinforcement cage of the ring beam and other parts except the outline of the ring beam when making the animation, and simulating a concrete pouring bin by using a cavity formed by the periphery of the bottom surface, the outer side elevation and the inner side elevation of the ring beam.
3. The ring beam node BIM auxiliary construction method capable of avoiding concrete pouring blockage according to claim 1, which is characterized in that: the modeling reference base diagram in the first step only comprises the profiles of the steel bars, the beams and the columns.
4. The ring beam node BIM auxiliary construction method capable of avoiding concrete pouring blockage according to claim 3, wherein the method comprises the following steps of: when the modeling reference base map in the first step is imported into the three-dimensional modeling software in the second step, the origin of coordinates of each component in the modeling reference base map is unified as one.
5. The ring beam node BIM auxiliary construction method capable of avoiding concrete pouring blockage according to claim 1, which is characterized in that: in the second step, modeling is respectively carried out on a plurality of section planes taking the central axis of the column where the ring beam is located as the center, and then the section planes are combined into a whole, and the steel bars on each section plane are modeled according to the sequence of the main bar on the upper part of the ring beam, the main bar on the lower part of the ring beam, the waist bar of the ring beam and the stirrup of the ring beam.
6. The ring beam node BIM auxiliary construction method capable of avoiding concrete pouring blockage, which is disclosed by claim 5, is characterized in that: when modeling the steel bars on the cut-off face, the mode of making two steel bars bound together tangent or leaving a gap is used for avoiding the mold penetration, and after the mold is built, interference inspection is performed to find out the interfered graphic elements and eliminate the interference.
7. The ring beam node BIM auxiliary construction method capable of avoiding concrete pouring blockage, which is characterized by comprising the following steps of: and step two, after the modeling is completed, if the thickness of the reinforcement protection layer in the model is insufficient or reinforcement is exposed out of the concrete, the size of the reinforcement cage is adjusted, so that no reinforcement is exposed out of the concrete and the thickness of the reinforcement protection layer is consistent with a design value.
8. The ring beam node BIM auxiliary construction method capable of avoiding concrete pouring blockage according to claim 1, which is characterized in that: and step four, after the step four is completed, making animation for guiding constructors to bind the reinforcing steel bar binding process by using the adjusted model.
9. The ring beam node BIM auxiliary construction method capable of avoiding concrete pouring blockage, which is characterized by comprising the following steps of: the video playing link of the animation of the reinforcement binding process is attached to a construction site in a two-dimensional code mode.
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| FR2989196B1 (en) * | 2012-04-05 | 2015-01-30 | Vinci Construction Grands Projets | METHOD FOR GENERATING AN INTERACTIVE DATA DISPLAY INTERFACE. |
| CN107448022A (en) * | 2017-08-29 | 2017-12-08 | 中国三冶集团有限公司 | A kind of food stuff refrigerated storage large area overlength method for constructing terrace based on BIM |
| CN111535588A (en) * | 2020-06-11 | 2020-08-14 | 中国十七冶集团有限公司 | System for selecting optimal pouring scheme based on BIM technology |
| CN115270278A (en) * | 2022-08-29 | 2022-11-01 | 李响 | BIM application and formwork construction process method for suspended inverted-pyramid frustum-shaped concrete structure |
| CN115600277A (en) * | 2022-09-20 | 2023-01-13 | 四川路桥桥梁工程有限责任公司（Cn） | Method for binding reinforcing steel bars in bridge cable tower anchoring area based on software secondary development technology |
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