CN110907463B - Endoscope-based concrete pouring compactness monitoring method for stiff beam-column joint - Google Patents
Endoscope-based concrete pouring compactness monitoring method for stiff beam-column joint Download PDFInfo
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- CN110907463B CN110907463B CN201911299142.1A CN201911299142A CN110907463B CN 110907463 B CN110907463 B CN 110907463B CN 201911299142 A CN201911299142 A CN 201911299142A CN 110907463 B CN110907463 B CN 110907463B
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- G—PHYSICS
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- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
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- G—PHYSICS
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/01—Arrangements or apparatus for facilitating the optical investigation
- G01N2021/0106—General arrangement of respective parts
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
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Abstract
The invention discloses a stiff beam-column joint concrete pouring compactness monitoring method based on an endoscope, which comprises the following steps: erecting a template; opening holes; installing a transparent acrylic tube; connecting the endoscope and the monitoring display equipment through a hard cable; advancing the endoscope to a first viewpoint; and (3) starting to pour the beam column concrete, and monitoring the concrete pouring compactness of each observation part from bottom to top: observing whether the concrete poured at each observation point position wraps the transparent acrylic tube or not by monitoring display equipment; when the transparent acrylic tube is wrapped, the endoscope and the transparent acrylic tube are removed; completing compactness monitoring; repeating the related steps until all the observation parts complete the compactness monitoring; and continuously pouring the beam column concrete until the stiff beam column joint construction is completed. The method realizes the whole-process monitoring of the hidden danger part, has high construction efficiency and low construction cost, can ensure the dense pouring effect of the beam column concrete, and improves the construction quality.
Description
Technical Field
The invention relates to a method for monitoring concrete pouring compactness of a stiff beam-column joint based on an endoscope, and belongs to the technical field of concrete pouring.
Background
The stiff beam-column structure is widely applied to high-speed railway stations due to the effect of bearing the dynamic load of trains. Referring to fig. 4, the existing stiff beam-column structure generally includes a steel column 10 having a rectangular cross section, and steel brackets 70 are welded to each side of the steel column 10, and generally, the steel brackets 70 are i-shaped steel, that is, the steel brackets 70 include upper and lower flange plates and a central web plate connecting the upper and lower flange plates. And in order to strengthen the shearing resistance of the steel bracket 70 and the steel column 10, the steel column 10 is connected with two adjacent steel brackets 70 through the welded steel flange web 30, and usually the steel flange web 30 is welded with the outer wall of the steel column 10 and simultaneously welded with the upper flange plate of the steel bracket 70. Then, a cast-in-place rebar structure 20 is bound and fixed corresponding to each steel corbel 70, and the cast-in-place rebar structure 20 generally comprises a transverse main rebar, a hoop and a tie bar. Then, formworks (not shown in fig. 4) are erected below and at two sides of the cast steel bar structure 20, and the construction of the concrete beam is completed after the beam-column concrete and the beam concrete are cast, so that the construction of the stiff beam-column structure is finished. It follows that the construction of such a stiff beam-column structure, and in particular at its stiff beam-column joints, is complicated. In actual construction, when beam-column concrete pouring is performed on a rigid beam-column node, because the reinforcing steel bars at the node are densely distributed and have small operable space, particularly, the reinforcing steel bars are located at the positions below the steel flange web 30 and close to the steel column 10, and the positions between the steel corbels 70 and the templates erected below the pouring reinforcing steel structure 20 and close to the steel column 10 (such as the positions indicated by the reference number 90 in fig. 4), the problems of insufficient concrete pouring compactness are easily caused at the positions, concrete filling cannot be completely ensured in the concrete pouring process, even if exhaust and vibration measures are taken, the hollow bulge phenomenon of the concrete in the beam is often caused by the problems of insufficient exhaust and insufficient vibration, and the structure quality is greatly influenced. At present, no better method is available for solving the problem except for increasing the vibration frequency. When the problems are found after the demolished templates are checked and accepted, the demolished templates need to be rebuilt, and great influence is brought to the project progress, the project quality and the construction cost.
Disclosure of Invention
The invention aims to provide a stiff beam-column joint concrete pouring compactness monitoring method based on an endoscope, which effectively overcomes various defects of the existing construction mode, realizes the whole-process monitoring of hidden danger positions on the basis of not damaging the existing construction structure, has high construction efficiency and low construction cost, can ensure the pouring compactness effect of beam-column concrete, and improves the construction quality.
In order to achieve the purpose, the invention adopts the following technical scheme:
a stiff beam column node concrete pouring compactness monitoring method based on an endoscope is characterized by comprising the following steps:
1) after the construction of the stiff beam-column joint to be poured is finished, erecting formworks below and at two sides of a pouring steel bar structure of the stiff beam-column joint to be poured;
2) the templates on the two sides are provided with holes, wherein: each pair of holes on the templates on the two sides are opposite to the corresponding part which is easy to have insufficient compactness on the stiff beam-column joint, and each pair of holes can be seen through by naked eyes;
3) defining the part which is easy to have insufficient compactness on the stiff beam-column joint as an observation part, and installing a transparent acrylic tube on each observation part: two ports of the transparent acrylic tube are sealed by transparent adhesive tapes, then the transparent acrylic tube extends into the hole of the template on one side, penetrates through the corresponding hole of the template on the other side after the reinforcing steel bar structure is poured, and both ends of the transparent acrylic tube are in a state of extending out of the templates on both sides;
4) before beam column concrete is poured, removing the transparent adhesive tape at one end of the transparent acrylic tube;
5) connecting the endoscope with a monitoring display device through a hard cable;
6) pushing the hard cable to push the endoscope into the middle of the pouring steel bar structure from the opening end of the transparent acrylic tube, wherein the position is used as a first observation point;
7) and (3) beginning to pour the beam column concrete, and monitoring the concrete pouring compactness of each observation part from bottom to top:
7-1) starting an endoscope at an observation part, and rotating the endoscope by twisting the hard cable, so that the endoscope captures images of the transparent acrylic tube pipeline condition at the observation point;
7-2) when the monitoring display equipment observes that the poured concrete rises to the periphery of the transparent acrylic pipe at the observation point and wraps the transparent acrylic pipe, pulling and pushing the hard cable, and moving the endoscope to other observation points respectively to observe whether other parts of the transparent acrylic pipe are wrapped by the concrete;
7-3) when the transparent acrylic tubes at each observation point are wrapped by concrete, the compactness of the concrete poured at the observation point meets the requirement, and then the endoscope is pulled out to pull out the transparent acrylic tubes;
7-4) finishing concrete pouring compactness monitoring of the observation part;
7-5) repeatedly executing the steps from 7-1) to 7-4) until the concrete pouring compactness monitoring of all the observation positions is finished;
8) and continuously pouring the beam column concrete until the stiff beam column joint construction is completed.
The invention has the advantages that:
the invention is designed aiming at the position where the insufficient compactness is easy to occur at the stiff beam-column node of the stiff beam-column structure, and adopts a mode of nondestructively observing the concrete pouring compactness by an endoscope in the process of pouring the beam-column concrete, namely, pouring the beam-column concrete while observing and controlling the compactness (not belonging to post detection), thereby improving the construction efficiency, realizing the whole-process monitoring of the poured beam-column concrete compactness on the basis of not damaging the existing construction structure, having simple, safe and reliable implementation, needing no rework, ensuring the pouring compactness effect of the beam-column concrete, effectively ensuring the construction progress and the construction quality, and having low construction cost.
Drawings
Fig. 1 is a view of a stiff beam-column joint to be poured from above, and an illustrative view of an embodiment of the concrete pouring compactness monitoring method of the invention.
Fig. 2 is an enlarged schematic view of a portion a in fig. 1.
Fig. 3 is a schematic diagram of the hole opening positions in the concrete pouring compactness monitoring method for the stiff beam-column nodes to be poured in a side view.
Fig. 4 is a schematic construction diagram of an existing stiff beam-column joint.
Detailed Description
Referring to fig. 1 to 3, the endoscope-based concrete pouring compactness monitoring method for the stiff beam-column joint comprises the following steps:
1) after the construction of the stiff beam-column joint to be poured is completed, a template 40 (as shown in fig. 3) is respectively erected below and at two sides of the pouring steel bar structure 20 of the stiff beam-column joint to be poured, wherein a wood template is generally adopted;
2) holes 41 with an external diameter of, for example, 14mm are made in the two side forms 40 using a hole cutter, wherein: each pair of holes 41 on the templates 40 on the two sides is opposite to the corresponding part on the stiff beam-column joint, which is easy to cause insufficient compactness, and each pair of holes 41 can be seen through by naked eyes, namely, the positions of the two holes 41 are ensured to be consistent or close to each other;
3) defining the part which is easy to have insufficient compactness on the stiff beam-column joint as an observation part, and installing a transparent acrylic tube 50 on each observation part: for example, a straight pipe with the wall thickness of 2mm and the outer diameter of 14mm is used as the transparent acrylic pipe 50, two ports of the transparent acrylic pipe 50 are sealed by transparent adhesive tapes to prevent impurities and water from entering the pipe, then the transparent acrylic pipe 50 extends into the hole 41 of the template 40 on one side, penetrates through the poured steel bar structure 20 and then extends out of the corresponding hole 41 of the template 40 on the other side, namely the transparent acrylic pipe 50 penetrates through a part of the stiff beam-column node where insufficient compactness is easy to occur, and two ends of the transparent acrylic pipe 50 are both in a state of extending out of the templates 40 on two sides, generally, two ends of the transparent acrylic pipe 50 extend out of the outer surface of the template 40 by 30cm and are flush with the outer edge of the steel flange web 30;
4) before the beam column concrete is poured, removing the transparent adhesive tape at one end of the transparent acrylic tube 50, and ensuring that the pipeline is not damaged;
5) connecting the endoscope 60 with a monitoring display device 80 (well-known device) at the outside through a hard cable 61 with a diameter of 5.5mm, for example, namely, connecting a signal port of the endoscope 60 with a signal port of the monitoring display device 80 through the hard cable 61, wherein the endoscope 60 is an NTS5500 type endoscope, and the endoscope 60 comprises a front-view camera, a look-around wide-angle camera (e.g. 108 degrees wide angle) and an LED searchlight;
6) pushing the hard cable 61, pushing the endoscope 60 into the transparent acrylic tube 50 from the open end of the transparent acrylic tube 50 (i.e. the end with the transparent rubberized fabric removed), and gradually pushing to a position in the middle of the cast steel bar structure 20, where the position serves as a first observation point, i.e. the first observation point is located in the middle of the two side templates 40, and the hard cable 61 should be kept as straight as possible;
7) the beam column concrete begins to be poured, namely the concrete is poured from the top of the pouring steel bar structure 20 without a supporting template, and then concrete pouring compactness monitoring is carried out on each observation part from bottom to top:
7-1) turning on the endoscope 60 and the monitoring display device 80 at the observation site, and rotating the endoscope 60 by twisting the hard cable 61, so that the endoscope 60 captures images of the pipe conditions of the transparent acrylic tube 50 at the observation site, specifically, turning on an LED searchlight, and recording the conditions around the pipe by a forward-looking camera and a look-around wide-angle camera;
7-2) when the monitoring display device 80 observes that the poured concrete rises to the periphery of the transparent acrylic tube 50 at the observation point and wraps the transparent acrylic tube 50, pulling and pushing the hard cable 61, and respectively moving the endoscope 60 to other observation points to observe whether other parts of the transparent acrylic tube 50 are wrapped by the concrete, wherein the compactness is manually judged by naked eyes through a picture displayed by the monitoring display device 80, and when the transparent acrylic tube 50 is wrapped by the concrete, the compactness is considered to meet the requirement;
7-3) when the transparent acrylic tube 50 at each observation point is wrapped by concrete, the compactness of the concrete poured at the observation point meets the requirement, and then after standing for a preset time (such as 2 minutes), the endoscope 60 is slowly pulled out, the endoscope 60 and the monitoring display device 80 are closed, the transparent acrylic tube 50 is slowly pulled out, and the breakage is avoided in the pulling-out process;
7-4) finishing concrete pouring compactness monitoring of the observation part;
7-5) repeatedly executing the steps from 7-1) to 7-4) until the concrete pouring compactness monitoring of all the observation positions is finished;
8) and continuously pouring the beam column concrete until the stiff beam column joint construction is completed.
In the step 1), the stiff beam-column joint to be poured is a part of the steel corbel 70 welded on the side surface of the steel column 10, the steel flange web 30 welded with the steel corbel 70 and the steel column 10, and the pouring steel bar structure 20 bound and fixed between the two steel columns 10 corresponding to the position of the steel corbel 70 and close to the steel column 10, within the range of the pre-constructed concrete beam.
The invention is designed for a stiff beam-column structure, the stiff beam-column structure comprises a steel column 10 with a rectangular section, steel corbels 70 are welded on each side surface of the steel column 10, and the steel corbels 70 are usually made of I-shaped steel, namely, the steel corbels 70 comprise an upper flange plate, a lower flange plate and a middle web plate connecting the upper flange plate and the lower flange plate. The steel column 10 is connected with two adjacent steel brackets 70 through welded steel flange webs 30, and the steel flange webs 30 are usually welded with the outer wall of the steel column 10 and simultaneously welded with the upper flange plates of the steel brackets 70. And a pouring steel bar structure 20 is arranged, bound and fixed at the position of each steel corbel 70. The cast steel bar structure 20 comprises transversely arranged main steel bars, and stirrups and tie bars are bound on the main steel bars. In actual construction, beam-column concrete and beam concrete are cast by the templates erected below and on both sides of the cast steel structure 20, so that the construction of the stiff beam-column structure is finished.
In the invention, the process of pouring concrete on the stiff beam-column node to be poured is called pouring beam-column concrete, and the construction of the stiff beam-column node is finished after the beam-column concrete is poured.
In the invention, the process of continuously pouring concrete on the rest parts except the rigid beam-column nodes of the pre-constructed concrete beam is called as pouring beam concrete, and the construction of the whole concrete beam is finished after the beam concrete is poured.
In step 2):
the observation site is a site below the steel flange web 30 and near the steel column 10 (e.g., a site corresponding to the upper hole 41 in fig. 3) and/or a site between the steel corbel 70 and the formwork 40 supported below the cast steel structure 20 and near the steel column 10 (e.g., a site corresponding to the lower hole 41 in fig. 3), wherein:
when the observation position is a position (e.g., a position corresponding to the upper hole 41 in fig. 3) located below the steel flange web 30 and close to the steel column 10, a through hole for the transparent acrylic tube 50 to pass through smoothly should be pre-opened in the steel corbel 70 of the stiff beam-column joint to be poured, and the through hole is usually opened in the middle web of the steel corbel 70.
Of course, the constructor can determine other observation positions according to the actual situation without the limitation.
In practical implementation, the number of observation points at each observation position can be designed according to practical situations, and the observation points should be changed at set time intervals (for example, at 5 minutes intervals) during the observation process.
When the concrete slurry splashes onto the outer wall of the transparent acrylic tube 50 in the process of pouring the beam column concrete, the condition around the transparent acrylic tube 50 cannot be seen clearly, and the endoscope 60 can be seen clearly by moving aside. This is because the endoscope 60 has a wide-angle camera of a wide angle of 108 degrees around, so that it can see the contaminated site at a nearby uncontaminated site.
In practical implementation, the monitoring display device 80 is used for observing that when the poured concrete rises to the periphery of the transparent acrylic tube 50 at the observation point, but the transparent acrylic tube 50 at the observation point is not wrapped, namely the density of the poured concrete is insufficient and does not meet the requirement, the vibration frequency of the area near the observation point is increased by the concrete vibrating rod to enhance the flowability of the concrete and ensure the normal exhaust until the transparent acrylic tube 50 is wrapped, namely the concrete is densified in real time.
In practice, for each observation site, the transparent acrylic tube 50 at one observation site is wrapped with concrete before the next observation site is observed.
In the process of pulling out the transparent acrylic tube 50, the holes 41 on the templates 40 on the two sides are blocked by the fixing plugs to prevent concrete from flowing outwards, and the holes formed by detaching the transparent acrylic tube 50 are vibrated by the concrete vibrating rod synchronously, so that the density of the original occupied space of the transparent acrylic tube 50 meets the requirement.
The invention has the advantages that:
the invention is designed aiming at the position where the weak compactness is easy to occur at the stiff beam-column node of the stiff beam-column structure, and adopts a mode of observing the concrete pouring compactness without damage by an endoscope in the process of pouring the beam-column concrete, namely, pouring the beam-column concrete while observing and controlling the compactness (not belonging to post detection), thereby improving the construction efficiency, realizing the whole-process monitoring of the poured beam-column concrete compactness on the basis of not damaging the prior construction structure, having simple, safe and reliable implementation, needing no rework, ensuring the pouring compactness effect of the beam-column concrete, effectively ensuring the construction progress and the construction quality, and having low construction cost.
The invention can be applied in any narrow space which can not be observed by naked eyes, and related devices and equipment (such as an endoscope and a transparent acrylic tube) can be recycled, thereby reducing the construction cost.
By adopting the endoscope and the monitoring display equipment, the whole-process video and image recording of the beam column concrete pouring process can be realized, and a data basis is provided for post analysis.
The above description is of the preferred embodiment of the present invention and the technical principles applied thereto, and it will be apparent to those skilled in the art that any changes and modifications based on the equivalent changes and simple substitutions of the technical solutions of the present invention are within the protection scope of the present invention without departing from the spirit and scope of the present invention.
Claims (4)
1. A stiff beam column node concrete pouring compactness monitoring method based on an endoscope is characterized by comprising the following steps:
1) after the construction of the stiff beam-column joint to be poured is completed, formworks are erected below and on two sides of a pouring steel bar structure of the stiff beam-column joint to be poured, wherein: the node of the stiff beam column to be poured is a steel corbel welded on the side surface of the steel column, a steel flange web plate welded and connected with the steel corbel and the steel column, and a pouring steel bar structure which is bound and fixed between the two steel columns corresponding to the position of the steel corbel and is close to the steel column;
2) the templates on the two sides are provided with holes, wherein: each pair of holes on the templates on the two sides are opposite to the corresponding part which is easy to have insufficient compactness on the stiff beam-column joint, and each pair of holes can be seen through by naked eyes;
3) defining the part which is easy to have insufficient compactness on the stiff beam-column joint as an observation part, and installing a transparent acrylic tube on each observation part: two ports of the transparent acrylic tube are sealed by transparent adhesive tapes, then the transparent acrylic tube extends into the hole of the template on one side, penetrates through the corresponding hole of the template on the other side after the reinforcing steel bar structure is poured, and both ends of the transparent acrylic tube are in a state of extending out of the templates on both sides; the observation part is a part which is positioned below the steel flange web plate and is close to the steel column and/or a part which is positioned between the steel corbel and a template supported below the pouring steel bar structure and is close to the steel column;
4) before beam column concrete is poured, removing the transparent adhesive tape at one end of the transparent acrylic tube;
5) connecting the endoscope with a monitoring display device through a hard cable;
6) pushing the hard cable to push the endoscope into the middle of the pouring steel bar structure from the opening end of the transparent acrylic tube, wherein the position is used as a first observation point;
7) and (3) beginning to pour the beam column concrete, and monitoring the concrete pouring compactness of each observation part from bottom to top:
7-1) starting an endoscope at an observation part, and rotating the endoscope by twisting the hard cable, so that the endoscope captures images of the transparent acrylic tube pipeline condition at the observation point;
7-2) when observing through monitoring display device that concreting rises to around the transparent acrylic tube of observation point department and wraps up transparent acrylic tube, draw and promote the stereoplasm cable, move the endoscope respectively to other each observation point on to whether other positions of transparent acrylic tube are wrapped up by the concrete and observe, wherein: each observation position is provided with a plurality of observation points, and one observation point is changed at intervals of set time in the observation process; when the poured concrete rises to the periphery of the transparent acrylic pipe at the observation point, but the transparent acrylic pipe is not wrapped, increasing the vibration frequency of the area near the observation point to enhance the flowability of the concrete until the transparent acrylic pipe is wrapped;
7-3) when the transparent acrylic tubes at each observation point are wrapped by concrete, the compactness of the concrete poured at the observation point meets the requirement, and then the endoscope is pulled out and the transparent acrylic tubes are pulled out;
7-4) finishing concrete pouring compactness monitoring of the observation part;
7-5) repeatedly executing the steps from 7-1) to 7-4) until the concrete pouring compactness monitoring of all the observation positions is finished;
8) and continuously pouring the beam column concrete until the stiff beam column joint construction is completed.
2. An endoscope-based concrete pouring compactness monitoring method for stiff beam-column joints according to claim 1, characterized in that:
in the step 3):
when the observation part is a part which is positioned below the steel flange web and close to the steel column, a through hole for the transparent acrylic pipe to pass through is formed in advance in the steel corbel of the stiff beam-column joint to be poured.
3. An endoscope-based concrete pouring compactness monitoring method for stiff beam-column joints according to claim 1, characterized in that:
when the in-process of pouring beam column concrete, the concrete thick liquid splashes on transparent ya keli guan outer wall, leads to can't clearly transparent during the transparent ya keli guan circumstances all around, will the endoscope moves to the next door.
4. A stiff beam-column node concrete casting compactness monitoring method based on an endoscope according to claim 1, characterized in that:
in the process of pulling out the transparent acrylic tube, the fixing plugs are used for blocking the holes on the two sides of the template, and the concrete vibration is synchronously carried out on the holes due to the fact that the transparent acrylic tube is detached.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201911299142.1A CN110907463B (en) | 2019-12-16 | 2019-12-16 | Endoscope-based concrete pouring compactness monitoring method for stiff beam-column joint |
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| CN201911299142.1A CN110907463B (en) | 2019-12-16 | 2019-12-16 | Endoscope-based concrete pouring compactness monitoring method for stiff beam-column joint |
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| CN115575614A (en) * | 2022-09-23 | 2023-01-06 | 中国五冶集团有限公司 | Simulation test and compactness detection method for inclined box type column height-throwing self-compacting concrete |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104807721A (en) * | 2015-03-03 | 2015-07-29 | 陈熙贵 | Method for comprehensively detecting grouting compactness of prestressed pipeline of cast-in-situ prestressed concrete beam |
| CN109488337A (en) * | 2018-11-20 | 2019-03-19 | 中铁上海工程局集团有限公司 | A kind of anti-come to nothing of tunnel double-lining concrete visualizes casting method |
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104807721A (en) * | 2015-03-03 | 2015-07-29 | 陈熙贵 | Method for comprehensively detecting grouting compactness of prestressed pipeline of cast-in-situ prestressed concrete beam |
| CN109488337A (en) * | 2018-11-20 | 2019-03-19 | 中铁上海工程局集团有限公司 | A kind of anti-come to nothing of tunnel double-lining concrete visualizes casting method |
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Effective date of registration: 20220815 Address after: 100160 Nord tower 1, 128 South Fourth Ring Road West, Fengtai District, Beijing. Patentee after: China Railway Construction Engineering Group Patentee after: China Railway Construction Engineering Group First Construction Co., Ltd. Address before: 100160 Nord tower 1, 128 South Fourth Ring Road West, Fengtai District, Beijing. Patentee before: China Railway Construction Engineering Group |
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