Concrete construction method based on embedded high-frequency vibrating system
The concrete construction method using a pre-embedded high-frequency vibration system solves the problem of traditional vibration processes relying on manual experience, achieving efficient and standardized concrete construction, ensuring construction quality and efficiency, and is particularly suitable for large-area and complex structures.
Patent Information
- Application Number
- CN202511907116.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-12-17
- Publication Date
- 2026-01-20
AI Technical Summary
Traditional concrete vibration compaction relies on manual experience, which is inefficient, prone to quality defects, and makes it difficult to ensure construction quality and speed. In particular, it is difficult to insert the vibrator in complex parts, which can easily create voids and affect the overall structure.
An embedded high-frequency vibration system is adopted. Before the formwork is closed, high-frequency immersion vibrators are pre-embedded and fixed in the formwork system to form a vibration network covering the entire pouring area. Layered and segmented coordinated vibration, combined with the initial setting time of concrete, ensures uniform distribution of vibration energy. Integrated surface treatment reduces the differences in manual operation.
It achieves standardized control of concrete vibration, improves construction efficiency, eliminates quality defects, ensures concrete density and surface smoothness, reduces reliance on skilled workers, and is suitable for large-area and complex structure construction.
Smart Images
Figure CN121363310A_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The present application relates to the technical field of concrete construction methods, in particular to a concrete construction method based on a pre-embedded high-frequency vibrating system. BACKGROUND
[0002] In concrete pouring construction, the vibrating process is the key link to ensure the compactness of concrete and avoid quality defects. The traditional concrete vibrating process usually adopts a layered pouring method, which is operated by workers holding vibrating rods point by point, and the core principle is to insert the vibrating rod into the concrete quickly and pull it out slowly, each insertion point vibrates for 20 to 30 seconds, until the concrete no longer subsides, the surface is smooth and no bubbles come out. The vibrating rods need to be arranged in a row-column or plum blossom shape, and when inserted into the upper layer of concrete, they need to be inserted into the lower layer by 50 to 100 millimeters to ensure tight interlayer bonding. After vibrating, the surface needs to be manually leveled and polished.
[0003] However, the traditional process has many inherent defects: first, it is highly dependent on manual experience, and the vibrating quality is greatly affected by the worker's responsibility and technical proficiency, which can easily cause problems such as missed vibration, over-vibration, and damage to the formwork, resulting in uneven concrete density and quality defects such as honeycomb, pitted surface, and holes. Second, the "point-by-point operation" mode is inefficient and becomes a bottleneck in the pouring process, limiting the construction speed and prolonging the construction period. Third, in large-area construction, it is difficult to ensure that the upper layer is covered before the lower layer of concrete sets due to poor coordination or slow speed, which poses a risk of forming construction cold joints. Fourth, in complex parts such as steel-intensive beam-column joints, it is difficult to insert the vibrating rod into place, which can easily form cavities and affect the overall structure.
[0004] Therefore, there is an urgent need in the art for a new method of concrete vibration that can achieve standardization, high efficiency, and high quality, and effectively overcome the influence of human factors. SUMMARY
[0005] The purpose of the present application is to provide a concrete construction method based on a pre-embedded high-frequency vibrating system, which realizes the standardized control of concrete vibration, improves the construction efficiency and quality, and eliminates the many drawbacks of traditional construction methods.
[0006] To achieve the above purpose, the present application provides the following technical solutions: The concrete construction method based on the pre-embedded high-frequency vibrating system comprises the following steps: S1: Pre-disposing vibrating units Before closing the mold, a plurality of high-frequency insertion-type vibrators are pre-embedded and fixed in the formwork system at an interval of 300-1000mm according to a pre-set arrangement scheme, forming a vibrating network covering the entire pouring area; S2: Layered and segmented pouring and collaborative vibrating The pouring area is divided into pouring layers not greater than 500 mm, and the concrete volume that can be poured within 3 hours is taken as a construction section; during concrete pouring, the pre-embedded vibrator in the corresponding area is started along the advancing direction to perform cross-vibration in layers and sections, so as to ensure that the vibration capacity matches the concrete pouring strength, and each pouring layer is completed in covering and vibration before the initial setting of the next layer of concrete; S3: flat pulling out The pulling out of the vibrating rod is gradually pulled out as the pouring proceeds, and when the next pouring layer is completed, the vibrating rod is pulled out by a distance of one pouring layer; the subsequent pouring layers are operated in this way, and until the entire construction section is poured, the vibrating rod is finally pulled out of the concrete. S4: integrated surface treatment After the top concrete forms a platform, the following operations are performed in turn: using an insertion vibrator to reinforce and vibrate the upper and lower staggered layers; using a flat vibrator to vibrate the surface; using a straightedge to scrape the surface to the controlled elevation; using a wooden screed board to screed and compact; after the concrete is collected, before final setting, performing secondary light collection and screeding to remove surface bleeding and floating slurry.
[0007] Preferably, in S1, the pre-embedded high-frequency insertion vibrators are numbered, and the power supply and control lines of all vibrators are concentrated to an operation table, which is provided with a partition control switch and a vibration parameter adjustment knob.
[0008] It is worth noting that: position numbering can realize accurate positioning and corresponding control of the vibrator, avoid operation confusion, and ensure accurate matching of the pouring advancing direction and the vibration area; however, it is necessary to pay attention to the protection of the line arrangement to prevent damage caused by pressure, tension or concrete pollution during pouring.
[0009] Preferably, in S1, the vibrator is often connected with the cross bar of the scaffold, and can be simply fixed by using the scaffold fastener, which is convenient for frequently pulling out and fixing the vibrator during construction.
[0010] It is worth noting that: the scaffold is a common facility on the construction site, which is fixed by using the existing cross bar and fastener, without the need for additional special support to save materials and time; however, it is necessary to ensure that the fastener is tightened to avoid displacement of the vibrator due to loose fixing during vibration, which affects the vibration effect and even causes safety hazards.
[0011] Preferably, in S2, the vibration time of each insertion point is controlled within 20-30 seconds, and the vibration frequency of the vibrator is 8000-12000 Hz.
[0012] It is worth noting that: 20-30 seconds of vibration time can ensure that the concrete is fully compacted, and the internal bubbles are discharged, and the over-vibration can avoid the concrete segregation; but it needs to be noted that the vibration time needs to strictly follow the standard, and cannot be shortened or extended arbitrarily according to experience, and for high-grade, low-slump concrete, the upper limit value can be appropriately approached, and for low-grade, high-slump concrete, the lower limit value can be appropriately approached.
[0013] Preferably, in S2, the division of the construction section also needs to combine the initial setting time parameter of the concrete to ensure that the pouring and vibrating of the single construction section do not exceed 80% of the initial setting time of the concrete.
[0014] It is worth noting that: combined with the initial setting time to divide the construction section, it can fundamentally ensure that the upper layer of concrete is poured and vibrated before the lower layer of concrete is initially set, and completely eliminates the generation of construction cold joints; but it needs to be noted that the initial setting time of the concrete needs to be accurately tested according to the actual working conditions of the mix ratio, environmental temperature, humidity, etc., and cannot rely on theoretical values.
[0015] Preferably, in S3, the pulling-out speed of the vibrator is 5-10 seconds per pouring layer distance, and the vibration frequency remains unchanged during the pulling-out process.
[0016] It is worth noting that: the slow pulling-out speed of 5-10 seconds per pouring layer distance, combined with continuous vibration, can promote the concrete to fill the gap left after the vibrator is pulled out in time, avoiding the formation of holes; but it needs to be noted that the pulling-out speed needs to be controlled at a uniform speed, and cannot be fast and slow, avoiding the fact that the speed is too fast to fill the gap in time, or the speed is too slow to affect the construction efficiency.
[0017] Preferably, in S4, the secondary light collection and flattening adopts an electric light collection machine combined with manual auxiliary operation, and the rotating speed of the light collection machine is 1500-2000r / min.
[0018] It is worth noting that: the efficient operation of the electric light collection machine can greatly improve the surface light collection efficiency, saving time and labor cost compared with pure manual operation; but it needs to be noted that the rotating speed of the light collection machine needs to be adjusted according to the state of the concrete surface, and a lower rotating speed can be used at the initial stage of water collection, and the rotating speed can be gradually increased later, avoiding the fact that the rotating speed is too high to cause surface sanding.
[0019] Preferably, for the beam-column joint area with dense reinforcement, the pre-embedded spacing of the high-frequency plug-in vibrator is adjusted to 300-400mm, and the vibrator uses a micro high-frequency vibration head with a diameter not greater than 35mm.
[0020] It is worth noting that: the encryption interval of 300-400mm can ensure that the vibration energy of the dense reinforcement area is fully covered, avoiding missed vibration; but it needs to be noted that the pre-embedded spacing needs to be accurately designed in combination with the reinforcement arrangement density of the joint, avoiding the fact that the spacing is too small to cause interference between the vibrators, or the spacing is too large to appear a vibration blind area.
[0021] Preferably, after pre-arranging the vibration unit, before pouring the concrete, all the embedded vibrators are powered and tested, the test time is 5-10 seconds, the vibration state of the vibrator and the stability of the line connection are checked.
[0022] It is worth noting that: the power test can check the vibrator fault and line connection problem in advance, avoid the stoppage or quality defects caused by equipment failure during pouring process; but it should be noted that the test should be carried out one by one, and the record should be kept, and the fault equipment should be replaced or repaired in time.
[0023] Compared with the prior art, the beneficial effects of the present application are as follows: 1. Revolutionary "pre-arrangement after pouring" mode: by pre-embedding the vibrator before closing the mold, a standardized vibration network covering the whole pouring area is constructed, and the vibration is changed from traditional "passive treatment" to "active control", which fundamentally eliminates the possibility of missing vibration.
[0024] 2. High uniformity and reliability: standardized spacing arrangement and mechanized collaborative vibration ensure uniform distribution of vibration energy in concrete, and the overall compactness of the component is significantly better than traditional manual operation, effectively avoiding quality defects such as honeycomb, pitted surface, hole and the like.
[0025] 3. Construction efficiency is greatly improved: vibration and pouring are carried out in parallel, avoiding the time waste of traditional serial operation, especially suitable for large amount and large area concrete construction, which can effectively shorten the construction period.
[0026] 4. Effectively eliminate common quality problems: systematic sectional design and time control ensure tight interlayer bonding and completely eliminate construction cold joints; integrated surface treatment process effectively prevents surface shrinkage and cracking, and realizes the construction effect of internal real and external light.
[0027] 5. Reduce the dependence on skilled workers: streamline and standardize the complex vibration operation process, reduce the influence of manual operation difference on construction quality, and help to ensure the stability of construction quality. BRIEF DESCRIPTION OF DRAWINGS
[0028] Figure 1 is a schematic diagram of a double-point high-frequency vibrator in embodiment 4 of the present application; Figure 2 is a schematic diagram of a single-point high-frequency vibrator in embodiment 4 of the present application; Figure 3 is a schematic diagram of pouring the first layer of concrete in S3 of the present application; Figure 4 is a schematic diagram of pouring the next layer of concrete in S3 of the present application. DETAILED DESCRIPTION
[0029] Embodiment 1 In the large floor concrete construction, the concrete construction method based on the pre-embedded high-frequency vibrating system is adopted, and the specific steps are as follows: S1: pre-disposing vibrating unit Before the mold is closed, according to the preset arrangement scheme, the high-frequency plug-in vibrator is pre-embedded and fixed in the formwork system at an interval of 600mm, a total of 80 units are arranged, each vibrator is numbered, that is, 1-80, and the power supply and control line of all vibrators are concentrated to the central operation table; S2: pouring and collaborative vibrating in layers and sections The pouring area is divided into pouring layers of 500mm, and each 3 hours can pour 200m 3 The concrete quantity is divided into four construction sections; when the concrete is pumped and poured, the operator starts the vibrators of the first section, the second section, the third section and the fourth section in turn through the operation table according to the pouring advancing surface, the vibrators of the first section are 1-20, the vibrators of the second section are 21-40, the vibrators of the third section are 41-60, and the vibrators of the fourth section are 61-80, the vibrating time of each vibrator is controlled within 25 seconds, to ensure that the vibrating and pouring are synchronized and advanced, and each pouring layer is completed before the next layer is initially cured; S3: flow type pulling out The pulling out of the vibrating rod gradually pulls out with the pouring, and when the next pouring layer is completed, the vibrating rod is pulled out by one pouring layer distance; the subsequent pouring layer is operated in this way, and until the whole construction section is poured, the vibrating rod is completely pulled out of the concrete for the last time; S4: integrated surface treatment After the top concrete forms a platform, first, the plug-in vibrator is used to reinforce the upper and lower staggered layers; then the flat vibrator is used to vibrate along the pouring direction; then the straight edge is used to scrape the surface according to the design elevation; then the wood fender plate is repeatedly fendered to flatten and compact; after the concrete is collected for 3 hours, before final curing, the second light collection fendering is carried out, and the surface bleeding and floating slurry are removed.
[0030] Construction effect: after the construction is completed, it is detected that the floor concrete density is uniform, there is no honeycomb, pitted surface, hole and other quality defects, the surface flatness error is controlled within 3mm, the construction period is shortened by 30% compared with the traditional process, and no construction cold joint appears.
[0031] Example 2 Steel bar dense beam column joint concrete construction In the construction of a frame structure office building, the steel bar density in the beam column joint area is large, the main reinforcement diameter is 25mm, and the stirrup spacing is 100mm. The traditional vibrating process is difficult to ensure the density of the joint area concrete, and is prone to quality defects such as cavity and exposed reinforcement. The concrete construction method based on the pre-embedded high-frequency vibrating system is adopted, and the specific steps are as follows: S1: pre-disposing vibrating unit Before the mold is closed, a special arrangement plan is designed according to the beam-column joint reinforcement arrangement drawing: in the non-joint area, embed fixed high-frequency plug-in vibrators at an interval of 600 mm, using standard vibrating heads with a diameter of 50 mm; in the beam-column joint area, adjust the embedding interval of the vibrators to 350 mm, and select micro high-frequency vibrating heads with a diameter of 32 mm to avoid direct contact with the reinforcement; all vibrators are numbered, and the numbers in the joint area start with "J", such as J1-J20; the numbers in the non-joint area are 1-60; the power supply and control lines are concentrated to the field operation table, which is equipped with partition control switches and vibration parameter adjustment knobs; the vibrators are usually connected with the cross bars of the scaffolding, and can be simply fixed by using the scaffolding fasteners, which facilitates the frequent pulling out and fixing of the vibrators during construction.
[0032] S2: Layered and segmented pouring and collaborative vibration The pouring area is divided into 300 mm thick pouring layers, and the layer thickness in the joint area is smaller than that in the non-joint area to ensure sufficient vibration. Combined with the initial setting time of concrete, which is measured to be 4.5 hours, the total pouring and vibration time of a single construction segment is determined to be no more than 3.6 hours, which is 80% of the initial setting time. According to the calculation, 120 m 3 of concrete can be poured every 3 hours; during concrete pouring, the operation personnel start the vibrators in the non-joint area corresponding to the segment first, and then start the vibrators in the joint area, and then perform layered and segmented cross-vibration; the vibration frequency of the vibrators in the joint area is adjusted to 80 Hz, and that in the non-joint area is 60 Hz; the vibration time of each plug-in point is controlled to be 28 seconds to ensure that the vibration energy penetrates the gap between the reinforcements, and each pouring layer is completed before the initial setting of the next layer of concrete.
[0033] S3: Flowing type pulling out The pulling out of the vibrators is gradually pulled out as the pouring progresses, and when the next pouring layer in the current construction segment is completed, the vibrators in the joint area and the non-joint area are pulled out by one pouring layer distance at the same time; the subsequent pouring layers are operated in this way, and finally the vibrators are completely pulled out of the concrete after the entire construction segment is poured.
[0034] S4: Integrated surface treatment After the top concrete forms a platform, first use the plug-in vibrator to reinforce the joint between the beam-column joint and the non-joint area, and eliminate the weak points of interlayer bonding; then use the flat vibrator to vibrate the surface of the beam and column; then use the straightedge to scrape the surface according to the design elevation, focusing on calibrating the flatness of the joint area and the main body of the beam and column; use the wooden screed board to repeatedly screed and compact, especially for the fine treatment of the joint corner parts; after the concrete is collected for 2.5 hours before final setting, use an electric light collector with a speed of 1800 r / min to assist manual secondary light collection and screeding to remove surface bleeding and floating slurry, ensuring the smoothness of the joint area surface.
[0035] Construction effect: After construction, the concrete density of the beam-column joint area meets the standard, there are no quality defects such as voids and exposed reinforcement, the concrete of the joint and non-joint areas is tightly combined, and the overall structure is good; compared with the traditional process, the construction efficiency of the joint area is improved by 40%, and the quality rework rate is reduced from 15% to 0, effectively ensuring the bearing safety of the frame structure.
[0036] Example 3 Construction of mass raft foundation concrete The construction of the mass raft foundation of the underground garage of a residential area, the raft thickness is 2.2m, and the pouring volume reaches 3800m 3 , the hydration heat of the concrete needs to be controlled, at the same time, cold joints caused by large-area construction are avoided, and the surface flatness error is required to be controlled within 5mm, the concrete construction method based on the pre-embedded high-frequency vibration system is adopted, and the specific steps are as follows: S1: Pre-disposing vibration unit Before closing the mold, according to the size of the raft foundation, i.e. 60m long and 32m wide, a comprehensive vibration network is designed, 80 high-frequency plug-in vibrators are uniformly pre-embedded at an interval of 550mm, and a standard vibration head with a diameter of 50mm is used; all vibrators are arranged in a row-column form and numbered, i.e. 1-80, the power supply and control line are concentrated through a protective sleeve to the central operating table located at the edge of the raft, the line arrangement avoids the pouring channel, and good compression and anti-rolling protection is provided; after pre-embedding, all vibrators are tested for 8 seconds, the vibration state and line connection stability are checked, 2 vibrators with abnormal vibration are replaced, and the equipment is ensured to be intact.
[0037] S2: Layered and segmented pouring and collaborative vibration The "inclined layering and thin layer pouring" method is adopted, the pouring area is divided into 500mm thick pouring layers, the initial setting time of the concrete is measured to be 5 hours, the total pouring and vibration time of a single construction section is determined to be not more than 4 hours, and 13 construction sections are divided according to the pouring volume of 300m 3 of concrete per 3 hours; the concrete is continuously poured by pumping, and advances along the length direction of the raft; the operator starts the vibrator through the operating table according to the construction section sequence, the vibrators of adjacent construction sections are started alternately, and the vibration and pouring are carried out simultaneously; the vibration frequency of the vibrator is set to 70Hz, and the vibration time of each plug-in point is controlled to be 25 seconds, so that the vibration energy is uniformly transmitted to the inside of the concrete, the bubbles are discharged, and the compaction is promoted.
[0038] S3: Flowing type pulling out The withdrawal of the vibrating rod is gradually withdrawn as the pouring proceeds, and when the next pouring layer of the current construction section is completed, the vibrating rod in the corresponding area is withdrawn by one pouring layer distance. The subsequent pouring layers are operated in this way, and until the entire construction section is poured, the vibrating rod is completely withdrawn from the concrete for the last time.
[0039] S4: integrated surface treatment After the top concrete forms a platform, first, the upper and lower staggered layers at the junction of each construction section are reinforced and vibrated with the plug-in vibrator to eliminate the traces of interlayer combination. Then, the flat vibrator is used to vibrate the entire raft surface along the pouring direction. Then, a 3m long ruler is used to control the flatness by going back and forth according to the control elevation. A large area of wood is used to flatten and compact, and the surface density is enhanced. After 4 hours of water collection and before final setting, the electric light collector with a speed of 1600r / min is used to collect light twice. The first pass removes surface bleeding, and the second pass refines the surface finish, finally eliminating surface floating slurry and shrinkage cracks.
[0040] Construction effect: The entire raft foundation pouring process is continuous and orderly, and no construction cold joint is produced. Through detection, the internal density of the concrete is uniform, the hydration heat is well dissipated, the surface flatness error is controlled within 4mm, the construction period is shortened by 35% compared with the traditional process, and the quality risk and cost investment of mass concrete construction are greatly reduced.
[0041] Example 4 In a high-end commercial complex project, the fair-faced concrete wall is used as a core decorative element, and the concrete surface flatness and smoothness are required to be very high, and defects such as honeycomb, pitted surface, bubbles, cold joints are not allowed, and the surface needs to retain the natural texture without later plastering and decoration. The concrete construction method based on the pre-embedded high-frequency vibration system is used, and the specific steps are as follows: S1: Before molding, according to the design drawing of the fair-faced concrete wall, the wall thickness is 300mm, the height is 6m, and the length is 12m, and a refined vibrator arrangement scheme is developed: As shown in Figure 1 and Figure 2 , the high-frequency vibrator is divided into double-point type and single-point type, and each vibrator is fixed in form. The length of the vibrator head is 250mm~300mm, which is selected flexibly according to the actual situation. The distance between the two vibrator heads of the double-point vibrator (edge to edge) is 250mm, and the distance between the two vibrators arranged horizontally is 300mm~1000mm. The standard diameter of the vibrator head is 50mm. Both types of vibrators are included in the scope of the construction method patent. All the vibrators are numbered by position, with the rule of "wall number-area-sequence number", such as Q1-M-01, i.e. wall No. 1-non-hole area-01, Q1-D-01, i.e. wall No. 1-hole area-01, a total of 144 vibrators are arranged; The vibrators are usually connected with the scaffold crossbars, and can be simply fixed by using the scaffold fasteners, which is convenient for frequently pulling out and fixing the vibrators during construction process; The power supply and control lines of all the vibrators are concentratedly led to the mobile operation table on one side of the wall through PVC protective sleeve, the operation table is equipped with partition control switch, vibration time timer and vibration frequency adjusting knob, the line arrangement is fixed along the outside of the formwork, avoiding the pouring area and personnel passage, and good pressure-proof, anti-throw and anti-smash protection is done; After the pre-burial is completed, all the vibrators are tested by electrifying, each test vibration time is 7 seconds, the vibration state, line connection stability and clamp seat fixing condition are checked one by one, one vibrator with abnormal vibration frequency is replaced, and it is ensured that all the equipment is in good condition.
[0042] S2: layered and segmented pouring and collaborative vibration Combined with the pouring characteristics of the fair-faced concrete wall, the "vertical layering and horizontal advancing" method is adopted, the pouring area is divided into pouring layers according to 400mm thickness, which is thinner than the ordinary concrete pouring layer, so as to reduce the wall side pressure and ensure sufficient vibration; The actual measurement shows that the initial setting time of the fair-faced concrete is 5 hours, so the total time of pouring and vibration of a single construction section is determined to be not more than 4 hours, and 45m 3 The concrete is divided into construction sections according to the volume, the wall section is 300mm×6m, the horizontal length of each section is about 2.5m, and the whole wall is divided into 5 construction sections; The concrete is high-extended fair-faced special concrete, which is layered laid through the pumping guide pipe from one side of the wall bottom, and the laying speed is controlled to be uniform during pouring process to avoid concrete accumulation or segregation; The operator starts the vibrator of the corresponding construction section in the order of "from bottom to top and from one end to the other end" through the mobile operation table according to the pouring advancing face: first, the vibrator of the lower pouring layer of the first section is started, after pouring to the top surface of the layer, the upper vibrator is started, while the lower vibrator is kept off for 3 seconds to ensure the tight combination between layers; Vibration parameter control: the vibration frequency of the vibrator in the non-hole area is set to 10000Hz, and the vibration time of each insertion point is controlled to be 22 seconds; the vibration frequency of the vibrator in the hole peripheral area is adjusted to 11000Hz, and the vibration time is extended to 25 seconds, so as to ensure that the concrete in the steel bar dense area is fully compacted and the internal bubbles are discharged; During the pouring process, special personnel are arranged to observe the template state, the concrete surface paste and the vibrator working state, to adjust the vibration parameters in real time, to avoid over-vibration leading to concrete segregation or missing vibration defects, and to ensure that each pouring layer is completed before the next layer of concrete initial setting.
[0043] S3: flat pull-out The pull-out of the vibrating rod gradually pulls out as the pouring proceeds, and when the next pouring layer of the current construction section is completed, the vibrating rod in the corresponding area is pulled out by one pouring layer distance. The subsequent pouring layers are operated in this way, and until the entire construction section is poured, the vibrating rod is finally pulled out of the concrete.
[0044] S4: integrated surface treatment After the top concrete pouring forms a platform, first, the plug-in vibrator is used to reinforce and vibrate the weak parts such as the joint of each construction section, the upper and lower edges of the door and window openings, etc., to eliminate the interlayer and intersegment combination marks; Then, the auxiliary fixing parts outside the formwork are removed, and the flat vibrator is gently vibrated along the wall height direction to promote the surface concrete to flow flat and discharge the residual air bubbles on the surface; Before the initial setting of the concrete surface, i.e. there is no obvious indentation when pressing with a finger, a 2m long aluminum alloy ruler is used to scrape the surface according to the design elevation and flatness requirements, and the flatness of the door and window openings and the corners of the wall is corrected. The wooden rubbing plate is repeatedly rubbed and flattened in the scraping direction to enhance the surface density and form uniform natural texture on the wall surface. After 3.5 hours of water absorption and before final setting, i.e. the surface paste basically disappears and there is a slight indentation when pressing with a finger, an electric light collector with a speed of 1700r / min is used, equipped with a soft light collector, and assisted by manual operation for secondary light collection and rubbing: the light collector moves uniformly along the horizontal direction of the wall, and the manual operation follows to clean the small amount of bleeding and floating slurry on the surface. For the corners and edges of the openings that cannot be covered by the light collector, manual sponge rubbing is used for fine treatment to ensure that the wall surface is smooth and free of obvious marks, and the natural texture of the exposed aggregate concrete is preserved.
[0045] Construction effect: After the construction is completed, the exposed aggregate concrete acceptance standard is detected: The wall concrete density is uniform, there is no internal cavity, loose and other defects by ultrasonic detection, and the dense area of the steel bars around the door and window openings meets the standard; The surface flatness error is controlled within 2mm / m, the verticality error is not more than 3mm / 6m, there is no honeycomb, pitted surface, air bubbles, the surface air bubble diameter is less than 3mm, and the number of air bubbles per square meter is not more than 3, and there is no construction cold joint and obvious joint mark; The wall surface presents uniform natural cement color and fine texture, without the need for later plastering, finishing and other decoration treatments, directly achieving the decoration effect required by the design. Compared with the traditional manual vibration process, the construction efficiency of the fair-faced concrete wall is improved by 45%, the quality rework rate is reduced from 20% to 0, the quality control difficulty and cost investment of the fair-faced concrete construction are greatly reduced, and the construction period is shortened.
Claims
1. A method of concrete construction based on a pre-embedded high frequency vibration system, characterized in that, The method comprises the following steps: S1: pre-arranging the vibrating unit Before closing the mold, according to the pre-arranged arrangement scheme, a plurality of high-frequency plug-in vibrators are pre-embedded in the formwork system at an interval of 300-1000 mm to form a vibrating network covering the entire pouring area; S2: pouring and collaborative vibrating in layers and sections The pouring area is divided into pouring layers not greater than 500 mm, and the concrete volume that can be poured within 3 hours is taken as a construction section; during concrete pouring, the pre-embedded vibrators in the corresponding area are started along the advancing direction to perform cross-vibrating in layers and sections, so as to ensure that the vibrating capacity matches the concrete pouring strength, and each pouring layer is completed covering and vibrating before the initial setting of the next layer of concrete; S3: flow leveling type pulling out The pulling out of the vibrating rod gradually proceeds with the pouring, and when the next pouring layer is completed, the vibrating rod is pulled out by a distance of one pouring layer; the subsequent pouring layers are operated in this way, and finally the vibrating rod is completely pulled out of the concrete after the entire construction section is poured; S4: integrated surface treatment After the top concrete forms a platform, the following operations are performed in sequence: reinforcing and vibrating the upper and lower staggered layers by using the plug-in vibrator; flat vibrating the surface by using the flat vibrator; scraping the surface according to the control elevation by using the straight edge; using the wooden screed board to screed and compact; after the concrete is watered, the secondary light collection and screeding is performed before the final setting to remove the surface bleeding and floating slurry.
2. The method of claim 1, wherein the pre-embedded high frequency vibration system is installed in the concrete structure. In S1, the pre-embedded high-frequency plug-in vibrators are numbered, and the power supply and control lines of all the vibrators are concentratedly led to the operation table, which is provided with a partition control switch and a vibrating parameter adjustment knob.
3. The method of claim 1, wherein the pre-embedded high frequency vibration system is installed in the concrete structure. In S1, the vibrators are connected with the scaffold horizontal rods and are simply fixed by using the scaffold fasteners, so as to facilitate the frequent pulling out and fixing of the vibrators during construction.
4. The method of claim 1, wherein the pre-embedded high frequency vibration system is installed in the concrete structure. In S2, the vibrating time of each plug-in point is controlled within 20-30 seconds, and the vibrating frequency of the vibrator is 8000-12000 Hz.
5. The method of claim 1, wherein the pre-embedded high frequency vibration system is installed in the concrete structure. In S2, the division of the construction section also needs to consider the initial setting time parameter of the concrete to ensure that the total duration of pouring and vibrating in a single construction section does not exceed 80% of the initial setting time of the concrete.
6. The method of claim 1, wherein the pre-embedded high frequency vibration system is installed in the concrete structure. In S3, the pulling out speed of the vibrator is 5-10 seconds per pouring layer distance, and the vibrating frequency remains unchanged during the pulling out process.
7. The method of claim 1, wherein the pre-embedded high frequency vibration system is installed in the concrete structure. In S4, the secondary light collection and screeding are performed by using the electric light collection machine in combination with manual auxiliary operation, and the rotating speed of the light collection machine is 1500-2000 r / min.
8. The method of claim 1, wherein the pre-embedded high frequency vibration system is installed in the concrete structure. For the beam-column joint area with dense reinforcement, the pre-embedding interval of the high-frequency plug-in vibrator is adjusted to 300-400 mm, and the vibrator uses a micro high-frequency vibrating head with a diameter not greater than 35 mm.
9. The method of claim 1, wherein the pre-embedded high frequency vibration system is installed in the concrete structure. After pre-arranging the vibrating unit and before pouring the concrete, all the pre-embedded vibrators are powered on and vibrated for 5-10 seconds to check the vibrating state of the vibrators and the stability of the line connection.