CN116429559A - Concrete hollow slab detection equipment and detection method thereof - Google Patents
Concrete hollow slab detection equipment and detection method thereof Download PDFInfo
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- CN116429559A CN116429559A CN202310317107.8A CN202310317107A CN116429559A CN 116429559 A CN116429559 A CN 116429559A CN 202310317107 A CN202310317107 A CN 202310317107A CN 116429559 A CN116429559 A CN 116429559A
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- 238000001514 detection method Methods 0.000 title claims abstract description 61
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- 238000000034 method Methods 0.000 claims description 24
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- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/30—Investigating strength properties of solid materials by application of mechanical stress by applying a single impulsive force, e.g. by falling weight
- G01N3/303—Investigating strength properties of solid materials by application of mechanical stress by applying a single impulsive force, e.g. by falling weight generated only by free-falling weight
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Abstract
The invention discloses concrete hollow slab detection equipment, which comprises a heavy hammer, a guide piece, a load displacement sensor, a support and a collection and analysis host, wherein the support bottom plate is horizontally arranged on the top surface of a concrete hollow slab to be detected, the heavy hammer is slidably arranged on the support through the guide piece which is vertically arranged, and the load displacement sensor is positioned at the bottom of the guide piece and bears the impact of the free falling body of the heavy hammer and transmits the impact to the support bottom plate and the top surface of the concrete hollow slab; the load displacement sensor cable is connected to the acquisition and analysis host input terminal row. The invention also discloses a concrete hollow slab detection method, and the concrete hollow slab detection equipment is used for testing. The concrete hollow slab detection equipment and the detection method thereof have the advantages of saving detection time and improving working efficiency by means of mechanized detection.
Description
Technical Field
The invention relates to the technical field of concrete hollow slab detection, in particular to a concrete hollow slab detection device and a detection method thereof.
Background
In the development history of domestic buildings, due to the limitation of economy and technology, the final 50 th to 70 th of the 20 th century, a large number of domestic house floors adopt prestressed concrete hollow slabs, and the annual output reaches more than 1000 ten thousand cubic meters.
The prestressed concrete hollow plates can have the defects of steel bar corrosion, rust breakage, concrete cracking and the like in the using process of years, and the bearing capacity is seriously influenced, especially the prestressed concrete hollow plates of roof boards, toilets and kitchen parts are also frequently subjected to accidents of sudden collapse of the prestressed concrete hollow plates, so that the life and property safety of people are endangered.
The method for detecting the bearing capacity of the prestressed concrete hollow slab in the prior art is a static loading method of a floor slab. The method has the following problems:
1. the test time is long: the application of static load is realized by gradually increasing the pile load on the surface of the floor slab, the pile load is completed manually, and data are recorded after each step of pile load is completed until all loads are loaded. The process takes 1-2 hours.
2. The preparation and recovery time is long: the stacked counterweight part needs to be manually carried to a designated position, and the counterweight part needs to be manually cleaned and carried out after the test is finished, so that the time and labor are wasted, and the earlier stage preparation and later stage cleaning and carrying are required to be carried out for 1-2 days.
3. The preparation work is complicated: before the test starts, a tester is required to arrange instruments under the test board and debug the instruments, after the instruments are arranged, the counter weights are loaded step by step manually according to a loading scheme, and the automatic operation cannot be realized.
4. The load cost is high: the on-site water, concrete blocks, sand bags and other load objects need to be provided, so that the environment is polluted, the characteristics of saving and protecting the environment are not achieved, and the load cost is increased.
With the development of domestic house detection and identification, how to find out the potential safety hazard by a rapid and simple detection technology is urgent.
Disclosure of Invention
The invention aims to provide a concrete hollow slab detection device and a detection method thereof, which are used for mechanically detecting, so that the detection time is saved and the working efficiency is improved.
In order to solve the technical problems, the invention adopts the following technical scheme:
the invention relates to a concrete hollow slab detection device, which comprises a heavy hammer, a guide piece, a load displacement sensor, a support and a collection and analysis host, wherein a support bottom plate is horizontally arranged on the top surface of a concrete hollow slab to be detected, the heavy hammer is slidably arranged on the support through the guide piece which is vertically arranged, and the load displacement sensor is positioned at the bottom of the guide piece and bears the impact of the free falling body of the heavy hammer and transmits the impact to the support bottom plate and the top surface of the concrete hollow slab; the load displacement sensor cable is connected to the acquisition and analysis host input terminal row.
Furthermore, the guide piece specifically adopts a sliding rod, the heavy hammer is in a cylinder shape, a vertical through hole is formed in the central axis part of the heavy hammer, the through hole is in sliding fit with the sliding rod, and the heavy hammer adopts a remote control type drop hammer mode.
Further, the weight comprises two sets of inserted bar components, two mounting holes are symmetrically formed in the axis of the weight, insertion holes are formed in the top of the sliding rod in the radial direction, the inserted bar components are mounted in the mounting holes, and the working ends of the inserted bar components can be inserted into the insertion holes.
Further, the inserted link assembly comprises an inserted link, a pressure spring, an electromagnet and a blocking cover, wherein the inserted link slides in the mounting hole in a guiding manner, the blocking cover is blocked on an outer port of the mounting hole, and the pressure spring is tightly pressed between a blocking table in the middle of the inserted link and the blocking cover; the electromagnet is sleeved on the front end of the inserted link and can axially drive the inserted link; the electromagnetic iron is connected with a power supply and an electric control component in the heavy hammer.
Further, a first marking line is arranged on the top surface of the heavy hammer, and a second marking line is arranged above the jack by the sliding rod; when the first marking is aligned with the second marking, the front end of the inserted link is aligned with the jack.
Further, the concrete hollow slab comprises bottom displacement sensors, wherein the middle of the support is erected at two ends of the concrete hollow slab and suspended, the support is arranged on the top surface of the middle of the concrete hollow slab, and the bottom displacement sensors are arranged on the bottom surface of the concrete hollow slab corresponding to the lower part of the support; the bottom displacement sensor cable is connected to the acquisition and analysis host input terminal row.
Further, a bubble type level is arranged on the bracket bottom plate.
The invention also discloses a concrete hollow slab detection method, which is used for testing by using the concrete hollow slab detection equipment, and comprises the following steps:
s1, preparing a test, namely flatly placing a concrete hollow slab to be tested, assembling a heavy hammer, a guide piece, a load displacement sensor and a support on the top surface of the middle part of the concrete hollow slab, and placing an acquisition and analysis host on one side of the concrete hollow slab and connecting the load displacement sensor by a cable;
s2, parameter importing, namely, measuring or inquiring length, width and thickness data of the concrete hollow slab to be tested, inputting the length, width and thickness data into test software of an acquisition and analysis host computer, and inputting the free falling height of the heavy hammer;
s3, testing, namely controlling a remote controller of the heavy hammer to enable the heavy hammer to fall freely, and impacting the concrete hollow slab with a certain kinetic energy, wherein the heavy hammer impacts a load displacement sensor in the impact process, and the load displacement sensor feeds a transient impact signal back to an acquisition and analysis host, and the acquisition and analysis host analyzes, calculates and evaluates the bearing capacity of the floor slab;
s4, repeating the step S3 for at least 6 times, discarding invalid data and data with larger deviation, and calculating an average evaluation result.
Further, the step S1 further comprises a leveling procedure, and the top surface of the concrete hollow slab is horizontally adjusted by adopting a bubble type level meter.
Furthermore, in the step S1, a bottom displacement sensor is further arranged, the middle parts of the two ends of the concrete hollow slab to be tested are supported and horizontally placed in a suspended mode, the bottom displacement sensor is arranged at the middle position of the top of the concrete hollow slab, and the bottom displacement sensor is used for collecting bottom surface displacement in the moment of impact of a heavy hammer and transmitting the bottom surface displacement to a collecting and analyzing host machine for comparison analysis.
Compared with the prior art, the invention has the beneficial technical effects that:
according to the concrete hollow slab detection equipment, through the impact load displacement sensor of the free falling body and transmitting the load to the support bottom plate and the top surface of the concrete hollow slab, the displacement of the concrete hollow slab when being impacted by the instantaneous load is simulated, the instantaneous collected load and displacement are analyzed by the collecting and analyzing host, and whether the bearing capacity of the concrete hollow slab is qualified or not and whether defects and damages exist or not can be judged. Compared with the traditional static load method, the test has the advantages that the load is small, the load objects such as water, concrete blocks and sand bags are not needed to be provided on site, the environment is not polluted, the load cost can be saved for engineering, meanwhile, the detection equipment is portable in size and convenient to operate, and the site detection work can be completed by only two people. The concrete hollow slab detection equipment and the detection method thereof have the advantages of saving detection time and improving working efficiency by means of mechanized detection.
In addition, by adopting two sets of inserted rod assemblies symmetrically arranged along the central axis to anchor and hang the heavy hammer on the upper part of the slide bar, the stress is balanced, the two sides are released simultaneously in the hammer removing process, the scratch of the heavy hammer and the slide bar can be reduced, the reality and reliability of impact load are ensured, and the detection quality is improved; the inserted bar assembly formed by the inserted bar, the pressure spring, the electromagnet and the blocking cover adopts an electromagnetic drive inserted bolt structure, so that automatic drop hammer control is conveniently realized. Through setting up the jack of a plurality of different corners and height, can realize the weight free fall initial position of different height, enlarged measuring range. The bottom displacement sensor is additionally arranged on the bottom surface of the concrete hollow slab, so that the displacement information when the bottom surface of the concrete hollow slab is subjected to instant impact can be transmitted to the collecting and analyzing host computer, and the collecting and analyzing host computer corrects and verifies the detection result by adopting the displacement data.
According to the method for detecting the concrete hollow slab, the load bearing capacity of the concrete hollow slab is evaluated and tested in a load impact simulation mode through the heavy hammer impact, the concrete hollow slab can be rapidly detected, and a reliable evaluation result can be obtained through repeated tests. By collecting the impact instant displacement information of the heavy hammer on the bottom surface of the concrete hollow slab, the evaluation structure can be verified, and the test reliability is improved.
Drawings
The invention is further described with reference to the following description of the drawings.
FIG. 1 is a schematic diagram of a concrete hollow slab detection apparatus of the present invention;
FIG. 2 is a schematic cross-sectional view of the weight part of the present invention.
Reference numerals illustrate: 1. a heavy hammer; 101. a rod; 102. a pressure spring; 103. an electromagnet; 104. a blocking cover; 105. a first reticle; 2. a slide bar; 201. a jack; 202. a second reticle; 3. a load displacement sensor; 4. a bracket; 5. collecting and analyzing a host; 6. concrete hollow slab.
Detailed Description
The core of the invention is to provide the concrete hollow slab detection equipment and the detection method thereof, so that the detection time is saved and the working efficiency is improved by mechanized detection.
The following description of the embodiments of the present invention will be made in detail with reference to the accompanying drawings, wherein it is apparent that the embodiments described are only some, but not all embodiments of the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
In the description of the present invention, it should be understood that the terms "upper," "lower," "front," "rear," "left," "right," "top," "bottom," "inner," "outer," and the like indicate or are based on the orientation or positional relationship shown in the drawings, merely to facilitate description of the present invention and to simplify the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present invention.
In one embodiment, as shown in fig. 1 and 2, a concrete hollow slab detection apparatus includes a weight 1, a guide, a load displacement sensor 3, a bracket 4, and a collection and analysis host 5. The bracket 4 comprises a top plate and a bottom plate connected by three supporting ribs, and the guide piece is connected between the top plate and the bottom plate. The bottom plate of the bracket 4 is horizontally arranged on the top surface of the concrete hollow plate 6 to be detected, the heavy hammer 1 is slidably arranged on the bracket 4 through a vertically arranged guide piece, and the load displacement sensor 3 is positioned at the bottom of the guide piece and bears the impact of the free falling body of the heavy hammer 1 and transmits the impact to the bottom plate of the bracket 4 and the top surface of the concrete hollow plate 6. The load displacement sensor 3 is connected to the input terminal block of the acquisition and analysis host 5 through a cable.
Through the impact load displacement sensor 3 of the free falling body, and transmit load to the bottom plate of the bracket 4 and the top surface of the concrete hollow slab 6, the displacement of the concrete hollow slab 6 when being impacted by the instant load is simulated, and the collecting and analyzing host 5 analyzes the instant collected load and displacement, so that whether the bearing capacity of the concrete hollow slab 6 is qualified or not and whether defects and damages exist or not can be judged. Compared with the traditional static load method, the test has the advantages that the load is small, the load objects such as water, concrete blocks and sand bags are not needed to be provided on site, the environment is not polluted, the load cost can be saved for engineering, meanwhile, the detection equipment is portable in size and convenient to operate, and the site detection work can be completed by only two people. The concrete hollow slab detection equipment and the detection method thereof have the advantages of saving detection time and improving working efficiency by means of mechanized detection.
In a specific embodiment of the present invention, as shown in fig. 1 and 2, the guide member specifically adopts a sliding rod 2, and the sliding rod 2 can be welded, bolted or interference fit between the top plate and the bottom plate of the bracket 4. The heavy hammer 1 is in a cylindrical shape, a vertical through hole is formed in the central axis of the heavy hammer 1, the through hole is in sliding fit with the sliding rod 2, and the heavy hammer 1 adopts a remote control type drop hammer mode.
Specifically, as shown in fig. 1 and 2, the weight 1 includes two sets of rod assemblies, two mounting holes are symmetrically arranged on the axis of the weight 1, and one set of rod assembly is mounted in each mounting hole. The jack 201 is radially arranged at the top of the sliding rod 2, the inserting rod assembly is arranged in the mounting hole, the working end of the inserting rod assembly can stretch out and draw back, and the inserting rod assembly can be inserted into the jack 201 when being moved inwards in a serial mode.
Specifically, as shown in fig. 2, the insert rod assembly includes an insert rod 101, a compression spring 102, an electromagnet 103 and a blocking cover 104, the insert rod 101 slides in a guiding manner in a mounting hole, the blocking cover 104 is blocked on an outer port of the mounting hole, and the compression spring 102 is compressed between a blocking table in the middle of the insert rod 101 and the blocking cover 104. The electromagnet 103 is sleeved on the front end of the inserted rod 101 and can drive the inserted rod 101 axially. The electromagnet 103 is electrically connected with a power supply and an electric control assembly in the heavy hammer 1, and the electric control assembly connected with the electromagnet 103 is remotely controlled by adopting Bluetooth or infrared or ZigBee protocols.
Specifically, as shown in fig. 2, the top surface of the weight 1 is provided with a first marker 105, and the slide bar 2 is provided with a second marker 202 above the insertion hole 201. When the first marking line 105 is aligned with the second marking line 202, the weight 1 is rotated to a proper angle circumferentially, so that the front end of the plunger 101 is aligned with the insertion hole 201.
Furthermore, in order to obtain the initial positions of the free falling weights 1 with different heights, a plurality of insertion holes 201 which are radially staggered by a certain angle can be arranged along the sliding rod 2, for example, one insertion hole 201 is arranged every 90 degrees, and four initial height positions can be obtained. Meanwhile, the second reticle 202 is provided in plural sets to be matched with the respective insertion holes 201.
The two sets of inserted rod assemblies symmetrically arranged along the central axis are adopted to anchor and hang the heavy hammer 1 on the upper part of the slide rod 2, so that the stress is balanced, the two sides are released simultaneously in the process of removing the hammer, the scratch of the heavy hammer 1 and the slide rod 2 can be reduced, the reality and reliability of impact load are ensured, and the detection quality is improved; the electromagnetic drive plug structure is adopted by the plug rod assembly consisting of the plug rod 101, the pressure spring 102, the electromagnet 103 and the blocking cover 104, so that automatic drop hammer control is conveniently realized. By arranging a plurality of jacks 201 with different corners and heights, the initial free falling positions of the heavy weights 1 with different heights can be realized, and the measuring range is enlarged.
In a specific embodiment of the invention, the concrete hollow slab detection device further comprises a bottom displacement sensor, the two ends of the concrete hollow slab 6 are erected and supported in the middle to be suspended, the bracket 4 is arranged on the top surface of the middle of the concrete hollow slab 6, and the bottom displacement sensor is arranged on the bottom surface of the corresponding concrete hollow slab 6 below the bracket 4. The bottom displacement sensor cable is connected to the input terminal row of the acquisition and analysis host 5.
Through add the bottom displacement sensor on the concrete hollow slab 6 bottom surface, can give collection analysis host computer 5 with the displacement information transmission when the concrete hollow slab 6 bottom surface receives the instantaneous impact, the collection analysis host computer 5 adopts here displacement data to correct and verify the testing result.
In one embodiment of the invention, a bubble level is provided on the base of the stand 4. When the support 4 is installed, the concrete hollow slab 6 is ensured to be horizontal, and then the slide rod 2 is ensured to be in the vertical position.
According to the concrete hollow slab detection equipment, the free falling impact load displacement sensor 3 is used for transmitting load to the bottom plate of the bracket 4 and the top surface of the concrete hollow slab 6, so that the displacement of the concrete hollow slab 6 when being impacted by the instant load is simulated, the instant collected load and displacement are analyzed by the collecting and analyzing host 5, and whether the carrying capacity of the concrete hollow slab 6 is qualified or not and whether defects and damages exist or not can be judged. Compared with the traditional static load method, the test has the advantages that the load is small, the load objects such as water, concrete blocks and sand bags are not needed to be provided on site, the environment is not polluted, the load cost can be saved for engineering, meanwhile, the detection equipment is portable in size and convenient to operate, and the site detection work can be completed by only two people. The concrete hollow slab detection equipment and the detection method thereof have the advantages of saving detection time and improving working efficiency by means of mechanized detection. In addition, two sets of inserted rod assemblies symmetrically arranged along the central axis are adopted to anchor and hang the heavy hammer 1 on the upper part of the slide rod 2, so that the stress is balanced, the two sides are released simultaneously in the hammer removing process, the scratch of the heavy hammer 1 and the slide rod 2 can be reduced, the reality and reliability of impact load are ensured, and the detection quality is improved; the electromagnetic drive plug structure is adopted by the plug rod assembly consisting of the plug rod 101, the pressure spring 102, the electromagnet 103 and the blocking cover 104, so that automatic drop hammer control is conveniently realized. By arranging a plurality of jacks 201 with different corners and heights, the initial free falling positions of the heavy weights 1 with different heights can be realized, and the measuring range is enlarged. Through add the bottom displacement sensor on the concrete hollow slab 6 bottom surface, can give collection analysis host computer 5 with the displacement information transmission when the concrete hollow slab 6 bottom surface receives the instantaneous impact, the collection analysis host computer 5 adopts here displacement data to correct and verify the testing result.
The invention also discloses a concrete hollow slab detection method, which is used for testing by using the concrete hollow slab detection equipment in any specific embodiment, and comprises the following steps:
s1, preparing a test, namely flatly placing a concrete hollow slab to be tested, assembling a heavy hammer, a guide piece, a load displacement sensor and a support, placing the assembled heavy hammer, the assembled guide piece, the assembled load displacement sensor and the assembled support on the top surface of the middle part of the concrete hollow slab, and placing an acquisition and analysis host on one side of the concrete hollow slab and connecting the assembled heavy hammer, the assembled guide piece, the assembled load displacement sensor and the assembled support with the load displacement sensor.
S2, parameter importing, namely, measuring or inquiring the length, width and thickness data of the concrete hollow slab to be tested, inputting the length, width and thickness data into test software of an acquisition and analysis host, inputting the free falling height of the heavy hammer, and lifting the heavy hammer to a corresponding jack for locking.
S3, testing, namely controlling a remote controller of the heavy hammer to enable the heavy hammer to fall freely, and impacting the concrete hollow slab with a certain kinetic energy, wherein the heavy hammer impacts a load displacement sensor in the impact process, and the load displacement sensor feeds a transient impact signal back to an acquisition and analysis host, and the acquisition and analysis host analyzes, calculates and evaluates the bearing capacity of the floor slab.
The slab form of each concrete hollow slab has a specific allowable load capacity sigma, i.e. the slab form has a function of its load capacity. Within the allowable load capacity sigma, the load P is related to the reaction characteristic R under its action.
Under the action of the instantaneous impact load P, the experimental concrete hollow slab can generate deformation displacement omega, and at the moment, a load displacement sensor can acquire and record the reaction characteristic R of the experimental concrete hollow slab under the action of the instantaneous impact load P, wherein the reaction characteristic R also comprises time T, amplitude A, frequency f and the like.
Experiments show that: for the same plate type, in the safety range, the instantaneous impact force P has a certain functional relationship with the reaction characteristic R, namely: r (T, a, F, ω) =f (P). The functional relationship is obtained by curve fitting after analysis of a large amount of experimental data.
When the experimental measurement value of the reaction characteristic R exceeds the set threshold value, the concrete hollow slab tested under the impact load P is considered to have potential safety hazards.
When the experimental measurement value of the reaction characteristic R is within the set threshold range, the test plate is considered to meet the safe use requirement under the impact load P.
S4, repeating the step S3 for at least 6 times, discarding invalid data and data with larger deviation, and calculating an average evaluation result.
The load bearing capacity evaluation test is carried out on the concrete hollow slab in a load impact simulation mode by the heavy hammer impact, the concrete hollow slab can be rapidly detected, and a reliable evaluation result can be obtained by repeating the test for a plurality of times.
Specifically, in the step S1, a leveling procedure is further included, and a bubble type level meter is adopted to level the top surface of the concrete hollow slab.
Specifically, the step S1 is characterized by further comprising the step of setting a bottom displacement sensor, wherein the middle parts of the two ends of the concrete hollow slab to be tested are supported and horizontally hung in the air, the bottom displacement sensor is arranged at the middle position of the top of the concrete hollow slab, and the bottom displacement sensor is used for acquiring bottom surface displacement at the moment of impact of a heavy hammer and transmitting the bottom surface displacement to an acquisition and analysis host machine for comparison analysis.
By collecting the impact instant displacement information of the heavy hammer on the bottom surface of the concrete hollow slab, the evaluation structure can be verified, and the test reliability is improved.
According to the method for detecting the concrete hollow slab, the load bearing capacity of the concrete hollow slab is evaluated and tested in a load impact simulation mode through the heavy hammer impact, the concrete hollow slab can be rapidly detected, and a reliable evaluation result can be obtained through repeated tests. By collecting the impact instant displacement information of the heavy hammer on the bottom surface of the concrete hollow slab, the evaluation structure can be verified, and the test reliability is improved.
In the present specification, each embodiment is described in a progressive manner, and each embodiment is mainly described in a different point from other embodiments, and identical and similar parts between the embodiments are all enough to refer to each other. For the device disclosed in the embodiment, since it corresponds to the method disclosed in the embodiment, the description is relatively simple, and the relevant points refer to the description of the method section.
The above embodiments are only illustrative of the preferred embodiments of the present invention and are not intended to limit the scope of the present invention, and various modifications and improvements made by those skilled in the art to the technical solutions of the present invention should fall within the protection scope defined by the claims of the present invention without departing from the design spirit of the present invention.
Claims (10)
1. The concrete hollow slab detection equipment is characterized by comprising a heavy hammer (1), a guide piece, a load displacement sensor (3), a support (4) and a collection and analysis host (5), wherein the bottom plate of the support (4) is horizontally arranged on the top surface of a concrete hollow slab (6) to be detected, the heavy hammer (1) is slidably arranged on the support (4) through the guide piece which is vertically arranged, and the load displacement sensor (3) is positioned at the bottom of the guide piece and bears the impact of free falling of the heavy hammer (1) and transmits the impact to the bottom plate of the support (4) and the top surface of the concrete hollow slab (6); the load displacement sensor (3) is connected to the input terminal row of the acquisition and analysis host (5) through a cable.
2. The concrete hollow slab detection apparatus of claim 1, wherein: the guide piece specifically adopts slide bar (2), weight (1) is cylinder shape and axis portion is provided with vertical through-hole, the through-hole with slide bar (2) sliding fit, weight (1) adopts the remote control formula of falling the hammer.
3. The concrete hollow slab detection apparatus of claim 2, wherein: the heavy hammer (1) comprises two sets of inserted link assemblies, two mounting holes are symmetrically formed in the axial lead of the heavy hammer (1), insertion holes (201) are formed in the top of the sliding rod (2) in the radial direction, the inserted link assemblies are mounted in the mounting holes, and the working ends of the inserted link assemblies can be inserted into the insertion holes (201).
4. A concrete hollow slab inspection apparatus according to claim 3, wherein: the inserting rod assembly comprises an inserting rod (101), a pressure spring (102), an electromagnet (103) and a blocking cover (104), wherein the inserting rod (101) slides in the mounting hole in a guiding manner, the blocking cover (104) is blocked on an outer port of the mounting hole, and the pressure spring (102) is tightly pressed between a blocking table in the middle of the inserting rod (101) and the blocking cover (104); the electromagnet (103) is sleeved on the front end of the inserted link (101) and can axially drive the inserted link (101); the electromagnet (103) is electrically connected with a power supply and an electric control assembly in the heavy hammer (1).
5. The concrete hollow slab detection apparatus of claim 1, wherein: the top surface of the heavy hammer (1) is provided with a first marking line (105), and the sliding rod (2) is provided with a second marking line (202) above the jack (201); when the first marking line (105) is aligned with the second marking line (202), the front end of the inserted rod (101) is aligned with the insertion hole (201).
6. The concrete hollow slab detection apparatus of claim 1, wherein: the concrete hollow slab comprises a concrete hollow slab body (6), a support (4) and a bottom displacement sensor, wherein the support is arranged at two ends of the concrete hollow slab body (6) in a suspended mode, the support (4) is arranged on the top surface of the middle of the concrete hollow slab body (6), and the bottom displacement sensor is arranged on the bottom surface of the concrete hollow slab body (6) corresponding to the lower portion of the support (4); the bottom displacement sensor cable is connected to the input terminal row of the acquisition and analysis host (5).
7. The concrete hollow slab detection apparatus of claim 1, wherein: the bottom plate of the bracket (4) is provided with a bubble type level.
8. A method for detecting a concrete hollow slab, characterized in that the method for detecting a concrete hollow slab according to any one of claims 1 to 7 comprises:
s1, preparing a test, namely flatly placing a concrete hollow slab to be tested, assembling a heavy hammer, a guide piece, a load displacement sensor and a support on the top surface of the middle part of the concrete hollow slab, and placing an acquisition and analysis host on one side of the concrete hollow slab and connecting the load displacement sensor by a cable;
s2, parameter importing, namely, measuring or inquiring length, width and thickness data of the concrete hollow slab to be tested, inputting the length, width and thickness data into test software of an acquisition and analysis host computer, and inputting the free falling height of the heavy hammer;
s3, testing, namely controlling a remote controller of the heavy hammer to enable the heavy hammer to fall freely, and impacting the concrete hollow slab with a certain kinetic energy, wherein the heavy hammer impacts a load displacement sensor in the impact process, and the load displacement sensor feeds a transient impact signal back to an acquisition and analysis host, and the acquisition and analysis host analyzes, calculates and evaluates the bearing capacity of the floor slab;
s4, repeating the step S3 for at least 6 times, discarding invalid data and data with larger deviation, and calculating an average evaluation result.
9. The method for detecting the concrete hollow slab according to claim 8, wherein: and the step S1 further comprises a leveling procedure, wherein a bubble type level meter is adopted to level the top surface of the concrete hollow slab.
10. The method for detecting the concrete hollow slab according to claim 8, wherein: and the step S1 is characterized by further comprising a bottom displacement sensor, wherein the middle of the two ends of the concrete hollow slab to be tested is supported and horizontally placed in a suspended manner, the bottom displacement sensor is arranged at the middle position of the top of the concrete hollow slab, and the bottom displacement sensor acquires bottom surface displacement at the moment of impact of a heavy hammer and transmits the bottom surface displacement to an acquisition and analysis host computer for comparison analysis.
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| CN202310317107.8A CN116429559A (en) | 2023-03-29 | 2023-03-29 | Concrete hollow slab detection equipment and detection method thereof |
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| CN202310317107.8A CN116429559A (en) | 2023-03-29 | 2023-03-29 | Concrete hollow slab detection equipment and detection method thereof |
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