A compacting and vibrating device for compacting concrete in a section steel dense area and a construction method thereof

Abstract

A kind of steel dense area concrete compaction vibrating device and its construction method, the vibrating device includes: vertical insertion type vibrating vibrating rod group, vibrating guide positioning frame with guide hole, wing bottom attached vibrating component installed in the lower surface of steel wing and vibrating through wing, and web side guide vibrating mechanism for vibrating through side vibrating head closely adhering to web, three from vertical direction, below wing and web side, and vibrating, constitute three-dimensional vibrating system.The vibrating method includes device installation, layered symmetrical blanking, combined synergistic vibrating and layer-by-layer repetition steps.This application eliminates the vibrating blind area under the steel wing, web back and other places from three dimensions, and prevents steel skeleton deviation by symmetrical blanking and synchronous vibrating, cooperates with intelligent control to realize quality controllable and traceable, significantly improves the compactness of steel dense area concrete and structural stress performance.

Description

Technical Field

[0001] This application relates to the field of building construction technology, specifically to a concrete compaction vibratory device and its construction method for densely packed steel sections, applicable to concrete pouring and vibration construction in densely packed steel sections (such as beam-column joints, large-span steel-concrete composite beams, etc.) in steel-concrete composite structures. Background Technology

[0002] As building structures develop towards large spans and super high-rise buildings, steel-concrete composite structures are widely used in large public buildings due to their combination of the high strength and seismic resistance of steel structures with the high stiffness and fire resistance of concrete. However, in this structure, the steel sections and reinforcing bars intersect densely, especially in core areas such as beam-column joints. The flanges and webs of the H-section steel sections are interwoven with the reinforcing bars, creating numerous narrow spaces and vibration blind spots. If construction control is not properly implemented, common quality defects such as honeycombing and voids can easily occur below the flanges, on both sides of the web, and in areas with dense reinforcing bars, seriously affecting structural safety and durability.

[0003] Currently, the main methods for concrete vibration in areas with dense steel profiles include manual insertion of small-diameter vibrators (supplemented by tapping the formwork), self-compacting concrete, attached vibrators, and layered pouring. However, these methods have the following shortcomings: small-diameter vibrators have low power and limited radius of action, making it difficult to effectively reach blind spots such as below the flanges and on the back of the web; manual operation relies on experience, making it difficult to accurately control vibration parameters, and easily leading to missed or over-vibration; self-compacting concrete is expensive, and its flow and filling capacity are limited in densely reinforced areas, and it cannot improve the bond between the steel profile and the concrete interface; attached vibrators have low energy transfer efficiency, and their effect is insufficient after attenuation by the formwork and reinforcement, and they are prone to causing formwork deformation; existing equipment has limited functionality and lacks systematic combination, making it impossible to achieve multi-point coordinated and three-dimensional vibration; in addition, the lateral pressure difference caused by uneven pouring on both sides of the steel profile may cause the frame to shift, affecting the stress performance. To address the above problems, there is an urgent need for a vibration device and its construction method that can eliminate vibration blind spots, control vibration quality, and prevent steel frame shift. Summary of the Invention

[0004] This application provides a concrete compaction vibratory device and its construction method for densely reinforced steel sections, aiming to solve the technical problems of vibration blind spots below the flanges of steel sections, on both sides of the web, and in densely reinforced steel sections, and to prevent the steel frame from shifting during the pouring process, thereby ensuring the compactness of concrete and the structural stress performance.

[0005] To solve the above-mentioned technical problems, the technical solution proposed in this application is as follows:

[0006] A concrete compaction vibratory device for densely packed steel sections, used for concrete pouring and vibration in areas where steel sections and reinforcing bars intersect, includes a vibrator assembly, a vibrator guide and positioning frame, a vibrator assembly attached to the bottom of the flange, and a web-side vibration guidance mechanism, wherein:

[0007] The vibratory rod assembly includes several immersion vibratory rods. In this embodiment, the immersion vibratory rods are high-frequency small-diameter vibratory rods, which are used to vertically immerse and vibrate concrete.

[0008] A vibratory guide and positioning frame is provided with a plurality of guide holes corresponding to the insert vibrator, and the insert vibrator is inserted into the concrete along the guide holes;

[0009] A vibratory compaction assembly is attached to the bottom of the flange. It is installed on the lower surface of the steel flange and is used to transfer vibration energy through the steel flange to the concrete below the steel flange.

[0010] A web-side vibration guiding mechanism is provided on at least one side of the web of a steel profile. The web-side vibration guiding mechanism has a side vibration head that is in close contact with the surface of the web of the steel profile, for transmitting vibration energy through the web of the steel profile to the concrete on the back side of the web of the steel profile.

[0011] The vibrating rod assembly, the vibrating component attached to the bottom of the flange, and the web-side vibration guide mechanism vibrate the concrete from the vertical direction, below the steel flange, and laterally from the web of the steel, respectively, forming a three-dimensional vibration system.

[0012] The working principle of the vibration device in this application is as follows: The root cause of the difficulty in vibration in densely packed steel sections lies in the dense intersection of the flanges, webs, longitudinal reinforcing bars, and stirrups of the H-shaped steel column, forming blind spots that cannot be reached by conventional single vibration methods, such as the area below the flanges and the back side of the web. This application eliminates these blind spots by using three vibration methods in different directions: First, a high-frequency, small-diameter vibrator is vertically inserted along the guide holes of the vibration guide positioning frame, achieving immersion vibration of the concrete between the reinforcing bars and around the steel section, with precise insertion points and uniform spacing, avoiding missed vibration and repeated vibration; Second, the vibration component attached to the bottom of the flange adheres to the lower surface of the steel flange, directly transferring vibration energy from the steel flange to the concrete below the flange, solving the vibration blind spot of the "inverted" dead corner below the flange; Third, the side vibrator head of the web-side guide vibration mechanism is close to the surface of the web and moves along the height of the web, transferring vibration energy through the web to the concrete on the back side of the web, achieving effective vibration of the concrete on the back side of the web. The three components form a three-dimensional vibration system from three dimensions: vertical, under the flange, and side of the web, thereby eliminating vibration blind spots in all directions and ensuring the compactness of concrete in areas with dense steel profiles.

[0013] Furthermore, the vibratory guide positioning frame is a lightweight aluminum alloy frame. The plurality of guide holes are arranged at intervals along the circumference of the steel section and avoid the flange and main reinforcement positions of the steel section. The vibratory guide positioning frame is assembled into a frame surrounding the steel section according to the size of the steel section component and the arrangement of the reinforcing bars, and can rotate around the circumference of the steel section to adjust the guide hole positions. This ensures that the insertion point position is accurate and the spacing is uniform, and can be flexibly assembled and reused according to the size of the component.

[0014] Furthermore, the vibratory tamping assembly attached to the bottom of the flange includes a micro vibrator, an elastic conductive pad, and a magnetic base. The vibratory tamping assembly attached to the bottom of the flange is magnetically attached and fixed to the lower surface of the steel flange. The vibration energy generated by the micro vibrator is evenly transmitted to the steel flange through the elastic conductive pad, which has both buffering and uniform vibration transmission functions. The micro vibrator adopts a high-frequency, low-amplitude design to avoid impacting the steel frame.

[0015] Furthermore, the web lateral vibration guiding mechanism includes an adjustable vibration guide rod and a lateral vibration head disposed at the end of the adjustable vibration guide rod. The lateral vibration head is in close contact with the surface of the steel web. The adjustable vibration guide rod can move up and down along the height direction of the steel web, thereby transmitting vibration energy to the concrete on the back side of the web along the entire height range of the web.

[0016] Furthermore, the insert vibrator is a high-frequency, small-diameter vibrator with a flexible and bendable head. Under the premise of mainly vertical insertion, it can be appropriately bent according to the distribution of steel sections and reinforcing bars to adjust the insertion angle and penetrate into dense areas that conventional vibrators cannot reach. The insert vibrator is equipped with a depth sensor for monitoring the insertion depth, which can monitor the insertion depth and vibration parameters in real time.

[0017] Furthermore, the vibrating device also includes an intelligent control box, which is connected to the vibrating rod group, the vibrating assembly attached to the bottom of the flange, and the web side-guided vibration mechanism via connecting cables. The intelligent control box is used to set and monitor and record the vibration time, vibration depth, and vibration frequency of each vibrating device in real time, and to coordinate the start and stop of the vibrating devices on both sides of the steel section through coordinated control, so as to maintain the vibration balance on both sides and avoid uneven stress on the steel frame caused by vibration on one side. At the same time, it automatically generates construction quality traceability data and provides alarm prompts for insufficient vibration time or missed vibration areas.

[0018] A method for compacting concrete in areas with dense steel profiles using a vibratory compactor, comprising the following steps:

[0019] S1. Assemble and install the vibration guide positioning frame according to the size of the steel component and the arrangement of the reinforcing bars. Install the vibration assembly attached to the bottom of the flange on the lower surface of the steel flange. Install the web side vibration guide mechanism on both sides of the steel web.

[0020] S2. Layered pouring is adopted, and the steel is poured symmetrically and evenly from both sides, the thickness of each layer is controlled, and the height difference between the concrete surfaces on both sides of the steel does not exceed the set value.

[0021] S3. After each layer of material is poured, the vibrating rod assembly is vertically inserted along the guide hole for immersion vibration. When the concrete pouring surface of each layer reaches the height of the lower surface of the steel flange, the vibrating assembly attached to the bottom of the flange is activated to vibrate the concrete below the steel flange. The side vibration guide mechanism of the web is activated to move the side vibrating head along the height direction of the steel web to vibrate the concrete on the back side of the steel web. The vibration on both sides of the steel is synchronized and the vibration parameters are consistent.

[0022] S4. Repeat S2 and S3 layer by layer until the pouring is completed.

[0023] Furthermore, before S2, there is a concrete mix design optimization step. The concrete is fine aggregate concrete with a coarse aggregate particle size of 5mm-20mm continuous gradation, and water-reducing agent and fly ash are added to make the concrete spread 550mm-650mm.

[0024] Furthermore, in S3, the spacing between the insertion points of the immersion vibrator is no greater than 300mm, the vibration time for each insertion point is 20s-30s, and the depth to which the immersion vibrator is inserted into the lower layer of concrete is no less than 50mm; the vibration time of the vibrating assembly attached to the bottom of the flange is 15s-20s; and the speed at which the side vibrating head of the web-side guiding vibration mechanism moves along the height direction of the web of the steel profile is 0.5m / min.

[0025] Furthermore, it also includes a step to strengthen vibration in the joint area and a step to supplement vibration for quality inspection. Specifically, it includes: reducing the spacing between insertion points to 200mm-250mm in the beam-column joint area, and using a combination of vertical and oblique vibration for vibration, with the total vibration time in the joint area not exceeding 45s; after each layer is vibrated, the density below the flange of the steel section and on both sides of the web of the steel section is checked by tapping, and the non-dense parts are supplemented by oblique insertion of a vibrating rod from the side.

[0026] This application proposes a concrete compaction vibratory device and its construction method for densely packed steel sections. Through the vertical insertion of a high-frequency, small-diameter vibrator, the transmission of vibration components attached to the bottom of the flange under the flange, and the web-side conduction of the web-guided vibration mechanism, a three-dimensional vibration system is formed collaboratively in three dimensions: vertical, under the flange, and lateral. This comprehensively covers traditional vibration blind spots such as under the steel flange and the back of the web, significantly improving concrete density. Simultaneously, an intelligent control box monitors and automatically records the vibration time, depth, and frequency of each vibrator in real time. This avoids the arbitrariness and reliance on experience in manual operation, ensures stable and controllable vibration quality, and achieves full traceability throughout the process.

[0027] In this technical solution, symmetrical material feeding and synchronous vibration can effectively balance the lateral pressure of concrete, prevent the steel frame from shifting during the pouring process, and ensure the structural stress performance. The vibration guide positioning frame ensures accurate insertion points, and the synchronous operation of multiple parts and dimensions greatly improves the vibration efficiency and shortens the construction cycle. Compared with the solution that uses all self-compacting concrete, this device allows the use of ordinary fine stone concrete, which not only reduces material costs, but also allows the device to be reused, resulting in outstanding comprehensive economic benefits.

[0028] Furthermore, the equipment configuration and process parameters can be flexibly adjusted according to different steel section forms and reinforcement arrangements, making it widely applicable to various components such as steel-concrete columns, beams, and joints, and it has broad engineering application prospects. Attached Figure Description

[0029] Figure 1 This is a front view of the overall layout of the vibratory compaction device in this application;

[0030] Figure 2 This is a side view of the overall layout of the vibratory compaction device in this application;

[0031] Figure 3 This is a plan view of the vibratory guide positioning frame of this application;

[0032] Figure 4 This is a schematic diagram of the structure of the vibratory tamping assembly attached to the bottom of the flange of this application;

[0033] Figure 5 This is a schematic diagram of the web plate lateral vibration guidance mechanism of this application.

[0034] In the diagram: 1. H-shaped steel column; 2. Longitudinal reinforcement; 3. Stirrups; 4. High-frequency fine-diameter vibrator; 5. Vibration guide and positioning frame; 6. Vibration assembly attached to the bottom of the flange; 7. Web side vibration guide mechanism; 8. Intelligent control box; 9. Connecting cable; 10. Guide hole; 11. Miniature vibrator; 12. Elastic conduction pad; 13. Magnetic base; 14. Adjustable vibration guide rod; 15. Side vibration head; 16. Depth sensor. Detailed Implementation

[0035] To make the objectives, technical solutions, and advantages of this application clearer, the following detailed description, in conjunction with the accompanying drawings and engineering examples, further illustrates this application. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the scope of this application. This embodiment uses the construction of steel-concrete composite columns in a middle school building as an example for illustration.

[0036] This application proposes a concrete compaction vibratory device for densely packed steel sections, such as... Figure 1 , Figure 2As shown, the vibratory compaction device is applied to a steel-concrete composite member with an H-shaped steel column 1. The H-shaped steel column 1 is surrounded by longitudinal reinforcing bars 2 and stirrups 3, with the steel sections and reinforcing bars densely intersecting. The vibratory compaction device mainly consists of a vibratory rod assembly (high-frequency small-diameter vibratory rod 4), a vibratory guide and positioning frame 5, a vibratory component attached to the bottom of the flange 6, a web-side vibration guide mechanism 7, an intelligent control box 8, and connecting cables 9. The specific structure and function of each component are as follows.

[0037] like Figure 1 , Figure 2 As shown, the vibratory tamping rod assembly includes several high-frequency, small-diameter vibratory tampers 4. In this embodiment, eight high-frequency, small-diameter vibratory tampers are used, including two specifications: Φ25mm and Φ30mm. The heads of the high-frequency, small-diameter vibratory tampers 4 adopt a flexible and bendable design, which can flexibly adjust the angle according to the distribution of structural steel and reinforcing bars, reaching dense areas that conventional vibratory tampers cannot reach. The high-frequency, small-diameter vibratory tampers 4 are equipped with depth sensors 16 and vibration sensors, which can monitor the insertion depth and vibration parameters in real time. The high-frequency, small-diameter vibratory tampers 4 are used for vertical insertion vibration of concrete.

[0038] like Figure 1 , Figure 3 As shown, the vibratory guide positioning frame 5 is made of lightweight aluminum alloy and is a circular frame surrounding the H-shaped steel column 1. Several guide holes 10 are provided on the frame according to the distribution of the steel sections and reinforcing bars. For example... Figure 3 As shown, the guide holes 10 are evenly spaced along the circumference of the steel profile. In this embodiment, eight guide holes are evenly arranged along the circumference, with a hole spacing of approximately 300 mm. Each guide hole 10 avoids the flange and main reinforcement of the steel profile. The vibratory guide positioning frame 5 can be flexibly assembled according to the component size and can rotate around the circumference of the steel profile to adjust the hole position. Its outer contour dimension is slightly smaller than the column cross-section dimension. The high-frequency fine-diameter vibrator 4 is vertically inserted into the concrete along the guide holes 10, thereby ensuring accurate insertion point position and uniform spacing, avoiding missed vibration and repeated vibration.

[0039] like Figure 1 , Figure 4 As shown, the vibratory compaction assembly 6 is attached to the bottom of the flange and installed on the lower surface of the H-beam flange using a magnetic or snap-on method. In this embodiment, it is fixed to the bottom surface of the steel flange by magnetic base 13. Figure 4 As shown, each set of vibratory compaction components 6 attached to the bottom of the flange includes a micro vibrator 11 and an elastic transmission pad 12. The vibration energy generated by the micro vibrator 11 is evenly transmitted to the steel flange through the elastic transmission pad 12, and then to the concrete below the flange, thereby solving the problem of the vibration blind zone below the flange. The micro vibrator 11 adopts a high-frequency, low-amplitude design. In this embodiment, the frequency is set to 12000 r / min and the amplitude is 0.5 mm to avoid impacting the steel frame. In this embodiment, four sets of flange-bottom attached vibratory compaction components 6 are installed on the lower surfaces of the upper and lower flanges of the H-shaped steel column 1, for a total of eight sets.

[0040] like Figure 1 , Figure 5 As shown, the web-side vibration-guiding mechanism 7 is disposed on at least one side of the web of the steel profile. In this embodiment, two sets are installed on each side of the web of the steel profile, for a total of four sets. Figure 5 As shown, the web lateral vibration guiding mechanism 7 includes an adjustable vibration guide rod 14 and a side vibration head 15 located at its end. The side vibration head 15 is in close contact with the web surface, and the adjustable vibration guide rod 14 can slide up and down along the height direction of the web, with the sliding stroke covering the entire column height range. The side vibration head 15 transmits vibration energy through the web to the concrete on the back side of the web, thereby achieving effective vibration of the concrete on the back side of the web and eliminating the blind zone of vibration on the back side of the web.

[0041] like Figure 1 As shown, the intelligent control box 8 is connected to the high-frequency fine-diameter vibrator 4, the flange bottom-attached vibrating assembly 6, and the web side-guided vibration mechanism 7 via connecting cables 9. The intelligent control box 8 integrates vibration parameter setting, real-time monitoring, data recording, and alarm functions. It can simultaneously control multiple sets of vibrating equipment to achieve synchronous start and stop of the vibrating equipment on both sides of the steel profile, ensuring balanced vibration on both sides. The intelligent control box 8 can automatically record the vibration time, insertion depth, and vibration frequency of each high-frequency fine-diameter vibrator 4, as well as the working time and frequency of the flange bottom-attached vibrating assembly 6 and the web side-guided vibration mechanism 7, forming complete construction quality traceability data, and automatically issuing alarm prompts for insufficient vibration time or missed vibration areas.

[0042] As can be seen from the above, the high-frequency fine-diameter vibrator 4, the vibrating component 6 attached to the bottom of the flange, and the web side-guided vibration mechanism 7 apply vibration energy to the concrete from three dimensions: vertical direction, below the flange of the steel section, and side of the web of the steel section, respectively, forming a three-dimensional vibration system. Under the coordinated control of the intelligent control box 8, it realizes all-round, blind-zone-free dense vibration of the concrete in the dense steel section area.

[0043] This application also proposes a vibration method for a concrete compaction vibrator in a densely packed steel section area, using the vibration device described above, and including the following steps:

[0044] S1. Assemble and install the vibration guide positioning frame according to the size of the steel component and the arrangement of the reinforcing bars. Install the vibration assembly attached to the bottom of the flange on the lower surface of the steel flange and install the web side vibration guide mechanism on both sides of the steel web.

[0045] According to the steel column design drawings, the H-section of this embodiment is 500mm×300mm, with 12 Φ25mm longitudinal steel bars 2 inside the column and Φ10mm@100 / 200 stirrups 3. Based on the component dimensions and steel bar arrangement, an aluminum alloy vibratory guide and positioning frame 5 is assembled. Its outer contour dimension is slightly smaller than the column cross-section dimension. Eight guide holes 10 are evenly arranged along the circumference, with a hole spacing of approximately 300mm. The holes avoid the steel flange and main reinforcement positions. Four sets of flange bottom attached vibratory components 6 are installed on the lower surface of the upper and lower flanges of the H-section steel column 1. These vibratory components 6 are attached to the lower surface of the steel flange by magnetic base 13. Each set of flange bottom attached vibratory components 6 includes a micro vibrator 11 and an elastic transmission pad 12. The vibration energy generated by the micro vibrator 11 is transmitted to the steel flange through the elastic transmission pad 12. The frequency of the micro vibrator 11 is set to 12000r / min, and the amplitude is 0.5mm.

[0046] Two sets of web-side vibration guide mechanisms 7 are installed on each side of the web of the steel profile. Each set of web-side vibration guide mechanisms 7 includes an adjustable vibration guide rod 14 and a side vibration head 15 at its end. The side vibration head 15 is in close contact with the surface of the web of the steel profile. The adjustable vibration guide rod 14 can slide up and down along the height of the web, and its sliding stroke covers the entire column range, so that the vibration energy is transmitted along the full height of the web to the concrete on the back side of the web. Eight high-frequency fine-diameter vibrating rods 4, vibration components 6 attached to the bottom of the flange, and web-side vibration guide mechanisms 7 are connected to the intelligent control box 8 through connecting cables 9. The operating status of each device is debugged, the parameters of the depth sensor 16 are calibrated, and the vibration time is set to 25s and the vibration depth is 350mm per layer.

[0047] S2. Layered pouring is adopted, with materials poured symmetrically and evenly from both sides of the steel section, controlling the thickness of each layer, and ensuring that the height difference between the concrete surfaces on both sides of the steel section does not exceed the set value.

[0048] This embodiment uses C45 fine aggregate concrete, with coarse aggregate consisting of 5mm-20mm continuously graded crushed stone, sand ratio controlled at 42%-45%, 1.2% high-efficiency carboxylic acid water-reducing agent and 20% fly ash added, concrete slump controlled at 180mm-200mm, spread at 600±50mm, and initial setting time controlled at 4h-6h to ensure that the concrete can smoothly pass through the gaps between the steel sections and reinforcing bars, and to ensure that the interval between layered pouring does not exceed the initial setting time.

[0049] A tremie pipe method was used for concrete pouring, with concrete poured symmetrically and evenly from both sides of the steel column. The thickness of each layer was controlled at approximately 350mm, and the height difference between the concrete surfaces on both sides was strictly controlled within 150mm to prevent the steel column from shifting due to lateral pressure differences. During the pouring process, a dedicated person monitored the verticality of the steel column, and any deviation was promptly adjusted to ensure that the concrete flowed evenly into the core area of ​​the node from different directions, reducing long-distance flow.

[0050] S3. After each layer of material is poured, the vibrating rod assembly is vertically inserted along the guide hole for immersion vibration. When the concrete pouring surface of each layer reaches the height of the lower surface of the steel flange, the vibrating assembly attached to the bottom of the flange is activated to vibrate the concrete below the steel flange; and the web side-guided vibration mechanism is activated to move the side vibrating head along the height direction of the steel web to vibrate the concrete on the back side of the steel web; and the vibration on both sides of the steel is kept synchronous and the vibration parameters are consistent.

[0051] Specifically, vibration is performed immediately after each layer of concrete is poured. Firstly, immersion vibration: Eight high-frequency, fine-diameter vibrators 4 are vertically inserted along the guide holes 10 of the vibration guide positioning frame 5, with an insertion point spacing of no more than 300mm. Following the principle of quick insertion and slow withdrawal, the vibration time is between 20s and 30s (25s in this embodiment). The insertion depth exceeds the thickness of the current layer by no less than 50mm, meaning the depth into the next layer of concrete is no less than 50mm, ensuring good interlayer bonding. Vibration continues until the concrete surface is smooth and no obvious air bubbles emerge. Secondly, flange bottom vibration: When the concrete pouring surface of each layer reaches the height of the lower surface of the steel flange, the flange bottom attached vibration assembly 6 is activated. The micro-vibrator 11 transmits vibration energy to the concrete below the flange through the elastic transmission pad 12. The vibration time is 15s-20s, ensuring the concrete below the flange is dense. Third, lateral vibration guidance of the web: The lateral vibration guidance mechanisms 7 on both sides of the web are activated synchronously. The side vibration heads 15 generate high-frequency vibrations in close contact with the web surface. The vibration energy is effectively transferred to the concrete on the back side of the web through the web of the steel profile. At the same time, the adjustable guide rod 14 moves slowly up and down along the height of the web at a speed of 0.5 m / min to ensure that the concrete on the back side is effectively vibrated throughout the entire height of the web, thereby eliminating the vibration blind zone on the back side of the web. Fourth, symmetrical synchronous control: The intelligent control box 8 ensures that the vibration equipment on both sides of the steel profile starts and stops synchronously, and the vibration parameters are consistent. The depth sensor 16 monitors the insertion depth of the vibrator rod in real time to maintain the uniform density of the concrete on both sides and prevent the steel profile from shifting.

[0052] In the beam-column joint area, where the steel profiles and reinforcing bars are most densely packed, vibration is most difficult. Strengthening measures are implemented: the number of vibration insertion points in the joint area is increased, with the spacing between points reduced to 200mm-250mm; in addition to the existing 8 high-frequency fine-diameter vibrators, 4 more Φ25mm fine-diameter vibrators are added, inserted obliquely into the core area of ​​the joint from different angles; a combination of vertical and oblique vibration is used, with the vibrators inserted at a 30°-45° angle to the vertical direction to ensure effective vibration of areas such as below the steel profile flanges and where reinforcing bars intersect; the vibration time in the joint area is appropriately extended to 30 seconds, but the total time should not exceed 45 seconds (preferably not exceeding 40 seconds) to prevent over-vibration leading to concrete segregation.

[0053] After each layer is vibrated, a tapping method (using a small wooden hammer to tap the steel flange and formwork) is used to judge the concrete density by sound. Locations producing hollow sounds are marked, and a thin-diameter vibrator is used to supplement the vibration from the side. The intelligent control box automatically records the vibration time, depth, and frequency data for each vibrator, generates a vibration quality report, and automatically alarms for insufficient vibration time or missed areas to ensure no omissions.

[0054] Within 12 hours of pouring the column concrete, cover it with geotextile and spray water for curing, keeping the concrete surface moist. The curing time should not be less than 14 days. Before the concrete strength reaches 5MPa, it is strictly forbidden to bump or disturb the steel frame and the poured concrete. After demolding, promptly check the appearance quality of the concrete. Repair any minor surface defects such as air bubbles and pitting using cement mortar with the same mix proportion as specified in the specifications.

[0055] S4. Repeat S2 and S3 layer by layer until the pouring is completed.

[0056] By adopting the vibration device and vibration method of this application, the density of concrete in the dense steel section is significantly improved. Ultrasonic testing shows that the internal density of the concrete can reach more than 98%, the steel and concrete interface are well bonded, and there are no defects such as voids or holes, which effectively ensures the construction quality and load-bearing performance of the steel-concrete structure.

[0057] This application proposes a concrete compaction vibratory device and its construction method for densely packed steel sections, systematically solving the problem of concrete vibration in densely packed steel sections from three levels: equipment, process, and control. At the equipment level, a high-frequency, small-diameter vibratory rod, a vibratory assembly attached to the bottom of the flange, and a web-side guiding vibration mechanism are organically combined to form a three-dimensional vibration system: the vibratory rod is inserted vertically, the flange assembly transmits vibration to the area below the flange, and the web mechanism transmits vibration along the web. These three components work together to comprehensively cover the blind spots of traditional vibration, significantly improving concrete density. At the process level, a systematic approach is adopted, including symmetrical material feeding, layered pouring, and synchronous vibration, effectively balancing the lateral pressure of the concrete, preventing steel frame displacement, and ensuring structural stress performance. Simultaneously, the vibratory guide positioning frame ensures precise insertion points, and simultaneous operation in multiple locations and dimensions greatly improves vibration efficiency and shortens the construction cycle. At the control level, an intelligent control box monitors and automatically records the vibration time, depth, and frequency of each device in real time, avoiding the arbitrariness and reliance on experience in manual operation, ensuring stable and controllable vibration quality and full traceability throughout the process. Furthermore, this device allows the use of ordinary fine aggregate concrete to replace self-compacting concrete, reducing material costs and enabling the device to be reused, resulting in significant overall economic benefits. The device configuration and process parameters can also be flexibly adjusted according to different steel sections and reinforcement arrangements, making it widely applicable to various components such as steel-concrete columns, beams, and joints, and possessing broad engineering application prospects.

[0058] The above description is only a preferred embodiment of this application. In this application, the steel profile is not limited to H-shaped steel column 1, but also applicable to steel-concrete beams, beam-column joints and other components; the number, specifications (such as Φ25mm, Φ30mm) and vibration parameters of the high-frequency fine-diameter vibrator 4 can be adjusted according to the component size; the shape of the vibrator guide positioning frame 5 and the number and spacing of the guide holes 10 can be adjusted according to the cross-sectional form of the steel profile and the arrangement of the reinforcing bars, and are not limited to a circular frame and 8 holes; the installation method of the vibrator assembly 6 attached to the bottom of the flange is not limited to the magnetic base 13, but can also be a snap-on type, and its number and the frequency and amplitude of the micro vibrator 11 can be adjusted; the number of groups of the web side guide vibration mechanism 7 and the moving speed of the side vibrator head 15 can be adjusted according to the web height; the concrete is not limited to C45 fine stone concrete, and its particle size, spread, sand ratio, admixture dosage and other parameters can be adjusted within the specification range; the insertion point spacing, oblique insertion angle and total vibration time of the joint area strengthening vibration can all be selected within the specification range. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this application shall be included within the scope of protection of this application.

Claims

1. A concrete compaction vibratory device for areas with dense steel profiles, used for concrete pouring and vibration in areas where steel profiles and reinforcing bars intersect densely, characterized in that, include: A vibrator assembly, consisting of several immersion vibrators, is used for vertically immersing and vibrating concrete. A vibratory guide and positioning frame is provided with a plurality of guide holes corresponding to the insert vibrator, and the insert vibrator is inserted into the concrete along the guide holes; A vibratory compaction assembly is attached to the bottom of the flange. It is installed on the lower surface of the steel flange and is used to transfer vibration energy through the steel flange to the concrete below the steel flange. A web-side vibration guiding mechanism is provided on at least one side of the web of a steel profile. The web-side vibration guiding mechanism has a side vibration head that is in close contact with the surface of the web of the steel profile, for transmitting vibration energy through the web of the steel profile to the concrete on the back side of the web of the steel profile. The vibrating rod assembly, the vibrating component attached to the bottom of the flange, and the web-side vibration guide mechanism vibrate the concrete from the vertical direction, below the steel flange, and laterally from the web of the steel, respectively, forming a three-dimensional vibration system.

2. The vibrating device according to claim 1, characterized in that, The vibratory guide positioning frame is a lightweight aluminum alloy frame. The plurality of guide holes are arranged at intervals along the circumference of the steel section and avoid the flange and main reinforcement positions of the steel section. The vibratory guide positioning frame is assembled into a frame surrounding the steel section according to the size of the steel section component and the arrangement of the reinforcing bars, and can rotate around the circumference of the steel section to adjust the guide hole positions.

3. The vibrating device according to claim 1, characterized in that, The vibratory assembly attached to the bottom of the flange includes a micro vibrator, an elastic conductive pad, and a magnetic base. The vibratory assembly attached to the bottom of the flange is fixed to the lower surface of the steel flange by the magnetic base. The vibration energy generated by the micro vibrator is evenly transmitted to the steel flange through the elastic conductive pad.

4. The vibrating device according to claim 1, characterized in that, The web lateral vibration guiding mechanism includes an adjustable vibration guide rod and a lateral vibration head disposed at the end of the adjustable vibration guide rod. The lateral vibration head is in close contact with the surface of the steel web, and the adjustable vibration guide rod can move up and down along the height direction of the steel web.

5. The vibrating device according to claim 1, characterized in that, The insert vibrator is a high-frequency, small-diameter vibrator with a flexible, bendable head. Under the premise of mainly vertical insertion, it can be appropriately bent to adjust the insertion angle according to the distribution of the steel profile and reinforcing bars. The insert vibrator is equipped with a depth sensor for monitoring the insertion depth.

6. The vibrating device according to any one of claims 1 to 5, characterized in that, It also includes an intelligent control box, which is connected to the vibrating rod group, the vibrating assembly attached to the bottom of the flange, and the web side vibration guide mechanism via connecting cables. The intelligent control box is used to set and monitor and record the vibration time, vibration depth and vibration frequency of each vibrating device in real time, and to coordinate and control the vibrating devices on both sides of the steel section to start and stop synchronously, so as to maintain the vibration balance on both sides.

7. A method for compacting concrete in areas with dense steel profiles using a vibratory compactor, comprising using the vibratory compactor as described in any one of claims 1 to 6, characterized in that, Includes the following steps: S1. Assemble and install the vibration guide positioning frame according to the size of the steel component and the arrangement of the reinforcing bars. Install the vibration assembly attached to the bottom of the flange on the lower surface of the steel flange. Install the web side vibration guide mechanism on both sides of the steel web. S2. Layered pouring is adopted, and the steel is poured symmetrically and evenly from both sides, the thickness of each layer is controlled, and the height difference between the concrete surfaces on both sides of the steel does not exceed the set value. S3. After each layer of material is poured, the vibrating rod assembly is vertically inserted along the guide hole for immersion vibration. When the concrete pouring surface of each layer reaches the height of the lower surface of the steel flange, the vibrating assembly attached to the bottom of the flange is activated to vibrate the concrete below the steel flange. The side vibration guide mechanism of the web is activated to move the side vibrating head along the height direction of the steel web to vibrate the concrete on the back side of the steel web. The vibration on both sides of the steel is synchronized and the vibration parameters are consistent. S4. Repeat S2 and S3 layer by layer until the pouring is completed.

8. The vibration method according to claim 7, characterized in that, Before step S2, there is also a concrete mix design optimization step. The concrete is fine aggregate concrete with a coarse aggregate particle size of 5mm-20mm continuous gradation, and water-reducing agent and fly ash are added to make the concrete spread 550mm-650mm.

9. The vibration method according to claim 7, characterized in that, In S3, the spacing between insertion points of the immersion vibrator is no greater than 300mm, the vibration time for each insertion point is 20s-30s, and the depth of the immersion vibrator inserted into the lower layer of concrete is no less than 50mm; the vibration time of the vibrating assembly attached to the bottom of the flange is 15s-20s; the speed at which the side vibrating head of the web-side guiding vibration mechanism moves along the height direction of the web of the steel profile is 0.5m / min.

10. The vibration method according to claim 7, characterized in that, It also includes a step to strengthen vibration in the joint area and a step to supplement vibration for quality inspection. Specifically, it includes: reducing the spacing between insertion points to 200mm-250mm in the beam-column joint area, and using a combination of vertical and oblique vibration for vibration, and the total vibration time in the joint area does not exceed 45s; after each layer is vibrated, the density below the flange of the steel section and on both sides of the web of the steel section is checked by tapping, and the non-dense parts are supplemented by oblique insertion of a vibrating rod from the side.

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