CN113075038A - Concrete strength detection device and method based on actual drilling method - Google Patents
Concrete strength detection device and method based on actual drilling method Download PDFInfo
- Publication number
- CN113075038A CN113075038A CN202110356345.0A CN202110356345A CN113075038A CN 113075038 A CN113075038 A CN 113075038A CN 202110356345 A CN202110356345 A CN 202110356345A CN 113075038 A CN113075038 A CN 113075038A
- Authority
- CN
- China
- Prior art keywords
- drilling
- concrete
- constant
- concrete strength
- drill bit
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000005553 drilling Methods 0.000 title claims abstract description 204
- 239000004567 concrete Substances 0.000 title claims abstract description 151
- 238000000034 method Methods 0.000 title claims abstract description 78
- 238000001514 detection method Methods 0.000 title claims abstract description 73
- 230000007246 mechanism Effects 0.000 claims abstract description 38
- 238000013499 data model Methods 0.000 claims description 24
- 238000012360 testing method Methods 0.000 claims description 24
- 230000008569 process Effects 0.000 claims description 14
- 238000012545 processing Methods 0.000 claims description 6
- 229910000831 Steel Inorganic materials 0.000 claims description 3
- 238000005259 measurement Methods 0.000 claims description 3
- 238000005457 optimization Methods 0.000 claims description 3
- 239000010959 steel Substances 0.000 claims description 3
- 239000010410 layer Substances 0.000 description 9
- 238000003763 carbonization Methods 0.000 description 4
- 238000010276 construction Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 230000006835 compression Effects 0.000 description 3
- 238000007906 compression Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 241001074085 Scophthalmus aquosus Species 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- KJFMBFZCATUALV-UHFFFAOYSA-N phenolphthalein Chemical compound C1=CC(O)=CC=C1C1(C=2C=CC(O)=CC=2)C2=CC=CC=C2C(=O)O1 KJFMBFZCATUALV-UHFFFAOYSA-N 0.000 description 2
- 238000005303 weighing Methods 0.000 description 2
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 1
- 230000002159 abnormal effect Effects 0.000 description 1
- 238000005299 abrasion Methods 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000012937 correction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000001066 destructive effect Effects 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 239000003721 gunpowder Substances 0.000 description 1
- 239000004973 liquid crystal related substance Substances 0.000 description 1
- 230000000750 progressive effect Effects 0.000 description 1
- 239000011150 reinforced concrete Substances 0.000 description 1
- 239000011435 rock Substances 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 238000007711 solidification Methods 0.000 description 1
- 230000008023 solidification Effects 0.000 description 1
- 238000011895 specific detection Methods 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 239000002344 surface layer Substances 0.000 description 1
Images
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- 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
- G01N3/08—Investigating strength properties of solid materials by application of mechanical stress by applying steady tensile or compressive forces
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/0001—Type of application of the stress
- G01N2203/0003—Steady
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/0014—Type of force applied
- G01N2203/0016—Tensile or compressive
- G01N2203/0019—Compressive
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/02—Details not specific for a particular testing method
- G01N2203/06—Indicating or recording means; Sensing means
- G01N2203/067—Parameter measured for estimating the property
- G01N2203/0682—Spatial dimension, e.g. length, area, angle
Abstract
The invention discloses a concrete strength detection device and method based on a real drilling method, wherein the concrete strength detection device comprises a drill bit, a constant-power drilling machine, a constant thrust mechanism, a force application frame, a pressure sensor and a display device; the drill bit is arranged on the constant-power drilling machine, and the constant-power drilling machine is used for driving the drill bit to drill the standard concrete to be tested; the constant thrust mechanism is connected between the constant power drilling machine and the force application frame, and is used for transmitting the drilling pressure applied by the force application frame to the constant power drilling machine at a preset constant pressure, and the constant thrust mechanism is of a constant force spring support and hanger structure; the pressure sensor is positioned between the constant thrust mechanism and the constant power drilling machine and is used for detecting the drilling pressure transmitted to the constant power drilling machine by the constant thrust mechanism; the display device is connected with the pressure sensor and can display the current pressure value detected by the pressure sensor. The device and the method have the advantages that the obtained concrete strength is more direct, the precision is easier to guarantee, the operation is simple and convenient, and the detection efficiency is greatly improved.
Description
Technical Field
The invention relates to the technical field of construction machinery, in particular to a concrete strength detection device and method based on a real drilling method.
Background
The secondary lining is a molded concrete or reinforced concrete lining applied on the inner side of a primary support in tunnel engineering construction, and forms a composite lining together with the primary support, the secondary lining plays roles of supporting surrounding rocks, stress storage of a supporting structure and the like in a tunnel, and the strength of the secondary lining concrete is a key factor influencing the overall construction quality of the tunnel, so that whether the strength of the secondary lining concrete of the tunnel can reach the expected strength after solidification needs to be detected in time after the secondary lining construction, and the detection of the strength of the secondary lining concrete is particularly important.
At present, various methods and technologies for testing the strength quality of the secondary lining concrete exist, but the defects of low efficiency, high labor consumption, high contingency, expensive equipment and complex operation exist, and the strength of the secondary lining concrete cannot be visually judged.
The existing tunnel secondary lining concrete detection method mainly comprises a nondestructive detection method and a destructive detection method. Wherein, the ultrasonic detection method, the geological radar detection method and the rebound method belong to nondestructive detection methods; the core drilling method, the pull-out method and the shooting method belong to the micro-damage detection method.
An ultrasonic detection method and a geological radar detection method are used for analyzing and detecting the reflection parameters in different media to detect abnormal geologic bodies through sound waves or high-frequency electromagnetic waves, and have the advantages of complex equipment and high cost; the resilience method detects the surface hardness of the structural concrete, and meanwhile, the service time of the concrete is required to be between 28 days and 1000 days generally, so that the requirement of the strength detection of the aged concrete cannot be met; the core drilling method damages the structure, weakens the section of the structure, influences the bearing capacity and reduces the safe reserve of the structure, and meanwhile, the method has a complex execution process and is not suitable for being used as a rapid field detection means; the pulling-out method is a testing method for measuring the compressive strength of concrete by pulling out the anchor device with the concrete by using a special tool, the structure of the anchor device is damaged to a certain extent, the operation process is complex, and the requirement of rapid detection cannot be met; the shooting method has safety problems, is greatly influenced by factors such as gunpowder, the quality of gun parts, coarse aggregates in a concrete surface layer and the like, the detection precision is difficult to guarantee, the discreteness of the obtained detection data is large, and the shooting method is rarely formally applied to domestic engineering.
In summary, how to solve the problems that the concrete strength detection operation is complex and the accuracy is not easy to guarantee has become a technical problem that needs to be solved urgently by the technical personnel in the field.
Disclosure of Invention
The invention aims to provide a concrete strength detection device and method based on a real drilling method, and aims to solve the problems that concrete strength detection operation is complex and precision is not easy to guarantee.
In order to achieve the aim, the invention provides a concrete strength detection device based on an actual drilling method, which comprises a drill bit, a constant-power drilling machine, a constant-thrust mechanism, a force application frame, a pressure sensor and a display device, wherein the drill bit is connected with the constant-power drilling machine;
the drill bit is arranged on the constant-power drilling machine, and the constant-power drilling machine is used for driving the drill bit to drill the standard concrete to be tested;
the constant thrust mechanism is connected between the constant power drilling machine and the force application frame, and is used for transmitting the drilling pressure applied by the force application frame to the constant power drilling machine at a preset constant pressure, and the constant thrust mechanism is of a constant force spring support and hanger structure;
the pressure sensor is positioned between the constant thrust mechanism and the constant power drilling machine and is used for detecting the drilling pressure transmitted to the constant power drilling machine by the constant thrust mechanism;
the display device is connected with the pressure sensor, and the display device can display the current pressure value detected by the pressure sensor.
Preferably, the drilling machine further comprises a collector and a processor, wherein the collector is used for collecting the drilling time length information consumed when the drill bit drills into a measuring area of standard concrete to be measured to a specified depth; the processor is used for calling concrete strength information corresponding to the drilling time information according to a corresponding relation table or a data model of the drilling time and the concrete strength which are calibrated when the pre-stored concrete strength detection device drills into the concrete to a specified depth; the display device can display the concrete strength information.
Compared with the introduction content of the background technology, the concrete strength detection device based on the actual drilling method comprises a drill bit, a constant-power drilling machine, a constant-thrust mechanism, a force application frame, a pressure sensor and a display device; the drill bit is arranged on the constant-power drilling machine, and the constant-power drilling machine is used for driving the drill bit to drill the standard concrete to be tested; the constant thrust mechanism is connected between the constant power drilling machine and the force application frame, and is used for transmitting the drilling pressure applied by the force application frame to the constant power drilling machine at a preset constant pressure, and the constant thrust mechanism is of a constant force spring support and hanger structure; the pressure sensor is positioned between the constant thrust mechanism and the constant power drilling machine and is used for detecting the drilling pressure transmitted to the constant power drilling machine by the constant thrust mechanism; the display device is connected with the pressure sensor and can display the current pressure value detected by the pressure sensor. The concrete strength detection device based on the actual drilling method is characterized in that in the practical application process, the drill bit is opposite to the surface of the concrete to be detected in strength, pressure along the axis direction of the drill bit is applied to the force application frame, the pressure of the force application frame is transmitted to the constant thrust mechanism, and the constant thrust mechanism is of a constant force spring support and hanger structure, so that the constant force spring support and hanger structure can always keep constant thrust within the compression stroke range of an internal spring, the thrust is displayed by the display device after being detected by the pressure sensor, and when pressure is applied to the force application frame, the applied pressure degree can be controlled by observing the current pressure value displayed by the display device, and the control is very convenient; the method comprises the steps that a drill bit applying constant pressure drills into a specified depth to the concrete with strength to be detected, the drilling time of a measuring area is recorded to obtain the drilling time of the measuring area, and then the drilling time of the measuring area is substituted into a corresponding relation table or a data model between the pre-calibrated drilling time and the concrete strength when the drill bit drills into the concrete to the specified depth according to a concrete strength detection device, so that the strength of the concrete to be detected can be obtained, when three factors, namely the power of a drilling machine (expressed by the rotating speed of the drilling machine), the quality of a drill rod (expressed by the abrasion degree of the drill bit) and the diameter of the drill rod are fixed values, the drillability of the concrete mainly depends on the mechanical property of the concrete, the higher the strength of the concrete is, the drilling resistance is influenced by the resistance of the concrete, or the higher the concrete resistance is, and the longer the drilling time is; the strength of concrete is lower, and the resistance that creeps into is just littleer, and the required drilling time of equal drilling depth is shorter, consequently, can directly regard the time length as the index of weighing the concrete intensity, because this concrete test block intensity detection device based on real brill method can keep the invariant to the pressure of drilling down of drill bit, consequently, it is more direct to obtain the concrete intensity through the device, and the precision is guaranteed more easily to easy operation is convenient, has promoted detection efficiency greatly.
In addition, the invention also provides a concrete strength detection method based on the actual drilling method, which specifically comprises the following steps:
step S1: establishing a data model, performing drilling operation on the concrete with different strengths by using a drill bit with a preset specification at a preset drilling pressure and preset drilling machine power, respectively recording the drilling time consumed when the drill bit drills the concrete with different strengths to a specified depth, and calibrating the corresponding relation between the concrete strength and the drilling time to form the data model;
step S2: drilling a measuring area of standard concrete to be measured, adopting a drill bit with a preset specification, a preset drilling pressure and preset drilling machine power which are adopted in the process of establishing a data model, drilling the standard concrete to the specified depth, and recording the time length of the drilling at the time;
step S3: repeating the step S2 to obtain a plurality of current drilling time lengths;
step S4: performing data optimization processing on the current drilling time in the step S3, and taking an average value as the drilling time of the measuring area after removing singular values;
step S5: and substituting the drilling duration of the measuring area into the data model to obtain the strength of the standard concrete to be measured.
Since the concrete strength detection device based on the actual drilling method has the technical effects, and the detection method and the detection device belong to a general inventive concept and have the same core idea, the detection method also has the corresponding technical effects, and the details are not repeated herein.
Preferably, the preset drill-down pressure is 150N.
Preferably, the specified depth is no greater than 70 mm; the diameter specification of the drill bit is not more than 18 mm.
Preferably, the number of the current drilling time periods recorded in the step S3 is not less than 5.
Preferably, when the drill contacts the coarse aggregate or the concrete embedded steel bar in the step S2, the step S2 is not executed again as the time of the secondary drilling.
Preferably, before the step S2 is executed, the depth of the carbonized layer on the surface of the measuring area of the standard concrete to be measured needs to be detected; the current drilling time period recorded in the step S2 is a time period taken for the drill bit to drill the area after the measured depth of the carbide layer is removed.
Preferably, when the data model is created in step S1, a correlation coefficient between the concrete strength relation calibrated by the sample under the laboratory conditions and the created data model is not less than 0.90.
Preferably, the drilling equipment used in the step S2 for drilling the test area of the standard concrete to be tested is the concrete strength testing device based on the actual drilling method according to claim 1 or 2.
Drawings
Fig. 1 is a schematic structural principle diagram of a concrete strength detection device based on a real drilling method according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of a concrete strength detection apparatus based on a drilling method provided by an embodiment of the present invention, where an application frame is not shown;
fig. 3 is a schematic structural diagram of the internal principle of the constant thrust mechanism according to the embodiment of the present invention.
In the above figures 1-3 of the drawings,
1-a constant power drill; 2-a pressure sensor; 3-a display device; 4-control handle; 5-a force application frame; 6-constant thrust mechanism; 61-external load support; 62, rolling wheels; 63-auxiliary spring; 64-knife cam; 65-main spring; 7-a drill bit; 8, standard concrete to be detected.
Detailed Description
The core of the invention is to provide a concrete strength detection device and method based on a real drilling method, so as to solve the problems that the concrete strength detection operation is complex and the precision is not easy to guarantee.
In order to make those skilled in the art better understand the technical solutions provided by the present invention, the present invention will be further described in detail with reference to the accompanying drawings and specific embodiments.
As shown in fig. 1-3, an embodiment of the present invention provides a concrete strength detection apparatus based on an actual drilling method, including a drill bit 7, a constant power drilling machine 1, a constant thrust mechanism 6, a force application frame 5, a pressure sensor 2, and a display device 3; the drill bit 7 is arranged on the constant-power drilling machine 1, and the constant-power drilling machine 1 is used for driving the drill bit 7 to drill the standard concrete 8 to be tested; the constant thrust mechanism 6 is connected between the constant power drilling machine 1 and the force application frame 5, the constant thrust mechanism 6 is used for transmitting the drilling pressure applied by the force application frame 5 to the constant power drilling machine 1 at a preset constant pressure, and the constant thrust mechanism 6 is in a constant force spring support and hanger structure; the pressure sensor 2 is positioned between the constant thrust mechanism 6 and the constant power drilling machine 1 and is used for detecting the drilling pressure transmitted to the constant power drilling machine 1 by the constant thrust mechanism 6; the display device 3 is connected with the pressure sensor 2, and the display device 3 can display the current pressure value detected by the pressure sensor 2.
The concrete strength detection device based on the actual drilling method is characterized in that in the practical application process, the drill bit is opposite to the surface of the concrete to be detected in strength, pressure along the axis direction of the drill bit is applied to the force application frame, the pressure of the force application frame is transmitted to the constant thrust mechanism, and the constant thrust mechanism is of a constant force spring support and hanger structure, so that the constant force spring support and hanger structure can always keep constant thrust within the compression stroke range of an internal spring, the thrust is displayed by the display device after being detected by the pressure sensor, and when pressure is applied to the force application frame, the applied pressure degree can be controlled by observing the current pressure value displayed by the display device, and the control is very convenient; the strength of the concrete to be detected can be obtained by substituting the drilling time of the measuring area into a corresponding relation table or a data model between the pre-calibrated drilling time and the concrete strength when the drill is drilled into the concrete to the specified depth according to the concrete strength detection device, wherein the drilling time of the measuring area is recorded, and the drilling time of the measuring area is recorded; the strength of concrete is lower, and the resistance that creeps into is just littleer, and the required drilling time of equal drilling depth is shorter, consequently, can directly regard the time length as the index of weighing the concrete intensity, because this concrete test block intensity detection device based on real brill method can keep the invariant to the pressure of drilling down of drill bit, consequently, it is more direct to obtain the concrete intensity through the device, and the precision is guaranteed more easily to easy operation is convenient, has promoted detection efficiency greatly.
It should be noted here that the constant-thrust mechanism is a specific structure of the constant-force spring support and hanger structure, and may include an external load support 61, a roller 62, an auxiliary spring 63, a knife cam 64 and a main spring 65, as shown in fig. 3, the working principle of the constant-thrust mechanism is specifically an axial elastic force generated by the main spring 65, the auxiliary spring 63 applies a radial force towards the main spring to the knife cam 64, and then the arc-shaped surface support surface of the knife cam cooperates with the roller 62 arranged on the external load support 61, so that the auxiliary spring generates a varying auxiliary axial force to the main spring while the axial elastic force of the main spring varies in the compression deformation process, and the auxiliary axial force is used for being superimposed with the axial elastic force of the main spring itself, so that the resultant force of the main spring and the axial elastic force is always kept at a preset constant thrust. The partial structure belongs to the structure known to those skilled in the art, and the connection relationship thereof will not be described one by one. In addition, it should be noted that the concrete strength detection device based on the actual drilling method can apply horizontal constant thrust to the drill bit as shown in fig. 1, can also apply vertical constant thrust to the drill bit as shown in fig. 2, and is suitable for both working conditions and can also be applied to the detection method for 360-degree full angles.
In some specific embodiments, the concrete strength detection device may further include a collector and a processor, wherein the collector is configured to collect drilling time length information consumed by the drill bit 7 drilling into the measurement area of the standard concrete 8 to be measured to a specified depth; the processor is used for calling concrete strength information corresponding to the drilling time information according to a corresponding relation table or a data model of the drilling time and the concrete strength which are calibrated when the pre-stored concrete strength detection device drills into the concrete to a specified depth; the display device is also capable of displaying the concrete strength information. Through arranging of collector and treater for concrete strength detection device can obtain the testing result fast, need not the manual work and goes to look up the comparison, uses convenient and fast more. It should be noted that the display device at this time may be specifically an instrument, and may also be an electronic display screen or a liquid crystal display, and in the actual application process, the selection may be performed according to actual requirements. In addition, it should be noted that the manner in which the collector collects the drilling duration information may be active collection, for example, when the pressure value detected by the pressure sensor reaches a preset pressure value and the drill bit is in a rotating state, the collector automatically starts timing, and when the pressure value detected by the pressure sensor is lower than the set pressure value, the collector automatically stops timing, so as to obtain the drilling duration information; or passive acquisition, such as human input, etc. In the practical application process, the selection can be performed according to the practical requirements, and is not specifically limited herein.
In addition, the invention also provides a concrete strength detection method based on the actual drilling method, which specifically comprises the following steps:
step S1: establishing a data model, performing drilling operation on the concrete with different strengths by using a drill bit with a preset specification at a preset drilling pressure and preset drilling machine power, respectively recording the drilling time consumed when the drill bit drills the concrete with different strengths to a specified depth, and calibrating the corresponding relation between the concrete strength and the drilling time to form the data model;
step S2: drilling a measuring area of standard concrete to be measured, adopting a drill bit with a preset specification, a preset drilling pressure and a preset drilling machine power which are adopted when a data model is established, drilling the standard concrete to a specified depth, and recording the time length of the current drilling;
step S3: repeatedly executing the step S2 to obtain a plurality of current drilling time lengths;
step S4: performing data optimization processing on the current drilling time in the step S3, and taking an average value as the drilling time of the measuring area after removing singular values;
step S5: and substituting the drilling time of the measuring area into the data model to obtain the strength of the standard concrete to be measured.
Since the concrete strength detection device based on the actual drilling method has the technical effects, and the detection method and the detection device belong to a general inventive concept and have the same core idea, the detection method also has the corresponding technical effects, and the details are not repeated herein.
In some embodiments, the preset drilling pressure provided by the medium constant thrust mechanism 6 may be 150N. Of course, the preset downhole pressure value is only an optimal value selected based on most concrete in the embodiment of the present invention, and in the actual application process, other preset downhole pressure values may be selected according to actual requirements, which is not limited in more detail herein.
In a further embodiment, in order to ensure more accurate detection, the specified depth is generally not greater than 70 mm; the diameter specification of the drill is not more than 18mm, for example, the diameter specification of the drill can be controlled to be 8mm-18 mm.
In a further embodiment, in order to further ensure that the detection accuracy is more accurate, the number of the current drilling time period recorded in the previous step S3 is not less than 5. And when the drill contacts the coarse aggregate or the concrete embedded steel bar in the step S2, the drilling time is not the current drilling time, and the step S2 is executed again.
In some specific embodiments, in order to avoid the influence of the carbonized layer on the accuracy of the detection result, before step S2 is executed, the depth of the carbonized layer on the surface of the detection area of the standard concrete to be detected needs to be detected, and the specific manner of detecting the depth of the carbonized layer can be to measure the carbonized depth by 1% phenolphthalein alcohol solution; the time duration of the secondary drilling recorded in step S2 is the time duration that the drill bit takes to drill the measurement area after removing the measured depth of the carbide layer, and specifically, the drilling operation may be performed after removing the carbide layer on the surface of the test structure according to the measured depth of the carbide layer, or the time duration of the secondary drilling may be recorded, and the timing test may be started after the drill bit drills to the average depth of the carbide layer.
In addition, in order to ensure the accuracy of the comparison reference, when the data model is established in step S1, the correlation coefficient between the concrete strength relational expression calibrated by the sample under the laboratory conditions and the established data model is not less than 0.90.
In some more specific embodiments, the drilling equipment used in the step S2 for drilling the test area of the standard concrete to be tested may adopt the concrete strength detection apparatus based on the actual drilling method described in any one of the foregoing embodiments. It should be noted that, generally, the constant pressure of the constant force spring support and hanger structure adopted in the detection device is adjustable, and when in use, the constant thrust mechanism can be adjusted to an appropriate constant thrust according to the parameters which are used for establishing a data model or a corresponding relation table.
In order to better understand the technical solution of the present invention, the following description is made in conjunction with more specific detection processes:
determining a drill rod: fixing the constant thrust, the drilling depth and the strength of a standard concrete sample, only changing the size of a drill bit to perform a drilling test of the drilling machine, recording the drilling time (reflecting the drilling speed by time), and determining the proper size of the drill bit according to the relation between the size of the drill bit and the drilling time;
and (3) determining constant thrust: according to the selected drill bit size, the drilling depth and the standard concrete sample strength are fixed, the drilling test of the drilling machine is carried out by only changing the constant thrust (the constant thrust is adjusted by a constant force mechanism), the drilling time (the drilling speed is reflected by time) is recorded, and the proper constant thrust is determined according to the relationship between the drill bit size and the drilling time;
concrete strength calibration under laboratory conditions: and (4) carrying out drilling test on the strength of the full-strength concrete, further obtaining the relation between the drillability and the strength of the concrete, and establishing a similar model.
And (3) measuring area treatment: measuring the carbonization depth, and removing a carbonization zone to avoid the influence of carbonization on the strength of the concrete; alternatively, the timing test may be started after drilling to the average carbonization depth.
The test was started: and adjusting the proper constant thrust force, enabling the drill bit to abut against the surface to be measured, enabling the drilling machine to freely screw on the surface of the concrete, and simultaneously carrying out watering and cooling treatment on the drill bit so as to keep the basic performance of the drill bit. In the test process, a stopwatch is used for recording the time value of the drilling machine when the drilling machine reaches a fixed depth, the time value is generally controlled to be 70mm, or the drilling machine with a displacement sensor is adopted for drilling, the drilling is stopped when the drilling machine is set to reach the specified depth, the drilling time is recorded after the test is finished, and the process is repeated in each test area.
And (3) processing test results: and processing the drilling time data of the tested points, comprehensively considering structural factors, environmental factors, equipment factors and environmental factors, and calibrating the concrete strength under laboratory conditions or directly looking up the table to obtain the strength of the tested concrete. When calculating the average value, the maximum value and the minimum value can be removed, and the average value of the rest measured values is taken as the drilling time of the measured concrete. If the test value of one test point has large deviation, the test piece under the same condition or the drilled concrete core sample can be adopted for correction.
And processing the collected detection values in a fixed mode and correcting the structure to finally obtain the strength value of the target structure concrete.
The method breaks through the conventional tunnel concrete strength detection method, adopts a drilling machine actual drilling method, performs concrete strength detection by a method of performing actual drilling detection by acting constant thrust on an electric hammer impact drill, uses a pure drilling speed (replacing drilling time) as an index of concrete strength classification, determines the concrete grade according to a formula of the strength-grade concrete and the drilling time by fitting test data and a standard-matching relation between the drilling time and the concrete strength, and performs concrete strength detection. The concrete strength detection method provided by the invention is simple in execution process and is suitable for being used as a rapid field detection means.
The concrete strength detection device and method based on the actual drilling method provided by the invention are described in detail above. It should be noted that, in the present specification, the embodiments are all described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments may be referred to each other.
It is also noted that, in this document, terms such as "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that an article or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such article or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other like elements in an article or device that comprises the element.
The principles and embodiments of the present invention are explained herein using specific examples, which are presented only to assist in understanding the core concepts of the present invention. It should be noted that, for those skilled in the art, it is possible to make various improvements and modifications to the present invention without departing from the principle of the present invention, and those improvements and modifications also fall within the scope of the claims of the present invention.
Claims (10)
1. A concrete strength detection device based on a real drilling method is characterized by comprising a drill bit (7), a constant-power drilling machine (1), a constant thrust mechanism (6), a force application frame (5), a pressure sensor (2) and a display device (3);
the drill bit (7) is installed on the constant-power drilling machine (1), and the constant-power drilling machine (1) is used for driving the drill bit (7) to drill a standard concrete (8) to be tested;
the constant thrust mechanism (6) is connected between the constant power drilling machine (1) and the force application frame (5), the constant thrust mechanism (6) is used for transmitting the drilling pressure applied by the force application frame (5) to the constant power drilling machine (1) at a preset constant pressure, and the constant thrust mechanism (6) is of a constant force spring support and hanger structure;
the pressure sensor (2) is positioned between the constant thrust mechanism (6) and the constant power drilling machine (1) and is used for detecting the drilling pressure transmitted from the constant thrust mechanism (6) to the constant power drilling machine (1);
the display device (3) is connected with the pressure sensor (2), and the display device (3) can display the current pressure value detected by the pressure sensor (2).
2. The concrete strength detection device based on the actual drilling method as claimed in claim 1, further comprising a collector and a processor, wherein the collector is used for collecting drilling time length information consumed by the drill bit (7) to drill into a measurement area of standard concrete (8) to be detected to a specified depth; the processor is used for calling concrete strength information corresponding to the drilling time information according to a corresponding relation table or a data model of the drilling time and the concrete strength which are calibrated when the pre-stored concrete strength detection device drills into the concrete to a specified depth; the display device can display the concrete strength information.
3. A concrete strength detection method based on a real drilling method is characterized by comprising the following steps:
step S1: establishing a data model, performing drilling operation on the concrete with different strengths by using a drill bit with a preset specification at a preset drilling pressure and preset drilling machine power, respectively recording the drilling time consumed when the drill bit drills the concrete with different strengths to a specified depth, and calibrating the corresponding relation between the concrete strength and the drilling time to form the data model;
step S2: drilling a measuring area of standard concrete to be measured, adopting a drill bit with a preset specification, a preset drilling pressure and preset drilling machine power which are adopted in the process of establishing a data model, drilling the standard concrete to the specified depth, and recording the time length of the drilling at the time;
step S3: repeating the step S2 to obtain a plurality of current drilling time lengths;
step S4: performing data optimization processing on the current drilling time in the step S3, and taking an average value as the drilling time of the measuring area after removing singular values;
step S5: and substituting the drilling duration of the measuring area into the data model to obtain the strength of the standard concrete to be measured.
4. The method for detecting concrete strength based on the actual drilling method according to claim 3, wherein the preset drilling pressure is 150N.
5. The method for detecting concrete strength based on the actual drilling method according to claim 3, wherein the specified depth is not more than 70 mm; the diameter specification of the drill bit is not more than 18 mm.
6. The method for detecting concrete strength based on the live drilling method according to claim 3, wherein the number of the current drilling time period recorded in the step S3 is not less than 5.
7. The method for detecting concrete strength according to the actual drilling method of claim 3, wherein the step S2 is not repeated as the time period for the current drilling when the drill contacts the coarse aggregate or the concrete embedded steel bar in the step S2.
8. The method for detecting concrete strength based on the actual drilling method according to claim 3, wherein before the step S2 is executed, the depth of the carbonized layer on the surface of the measuring area of the standard concrete to be detected is detected; the current drilling time period recorded in the step S2 is a time period taken for the drill bit to drill the area after the measured depth of the carbide layer is removed.
9. The method for detecting concrete strength based on the actual drilling method according to claim 3, wherein when the data model is established in the step S1, the correlation coefficient between the concrete strength relational expression calibrated by the sample under the laboratory condition and the established data model is not less than 0.90.
10. The method for detecting the strength of concrete based on the actual drilling method according to claim 3, wherein the drilling equipment used in the step S2 for drilling the test area of the standard concrete to be tested is the concrete strength detecting apparatus based on the actual drilling method according to claim 1 or 2.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110356345.0A CN113075038A (en) | 2021-04-01 | 2021-04-01 | Concrete strength detection device and method based on actual drilling method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110356345.0A CN113075038A (en) | 2021-04-01 | 2021-04-01 | Concrete strength detection device and method based on actual drilling method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113075038A true CN113075038A (en) | 2021-07-06 |
Family
ID=76614614
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110356345.0A Pending CN113075038A (en) | 2021-04-01 | 2021-04-01 | Concrete strength detection device and method based on actual drilling method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113075038A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113945455A (en) * | 2021-09-17 | 2022-01-18 | 广元市城建投资集团有限公司 | Quick assembly type concrete connection quality detection device |
| CN114486479A (en) * | 2022-01-26 | 2022-05-13 | 中国铁建重工集团股份有限公司 | Concrete strength detection device and method |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2451855Y (en) * | 2000-11-30 | 2001-10-03 | 国家电力公司郑州机械设计研究所 | Constant force support & hanger frame |
| CN2814073Y (en) * | 2005-09-13 | 2006-09-06 | 江阴市石油化工设备有限公司 | Non-side deviation constant force spring support |
| CN2867028Y (en) * | 2006-01-19 | 2007-02-07 | 中国石化工程建设公司 | High precision constant force spring supporting hanger frame |
| CN101419144A (en) * | 2008-11-25 | 2009-04-29 | 同济大学 | Micro-crack on site concrete strength detecting method and implementing device thereof |
| CN205298838U (en) * | 2015-12-17 | 2016-06-08 | 倍德力能源装备（江苏）有限公司 | Constant force spring hanger |
| CN108591622A (en) * | 2018-06-30 | 2018-09-28 | 扬州市泰克管道机械有限公司 | A kind of constant-force spring hanger |
-
2021
- 2021-04-01 CN CN202110356345.0A patent/CN113075038A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2451855Y (en) * | 2000-11-30 | 2001-10-03 | 国家电力公司郑州机械设计研究所 | Constant force support & hanger frame |
| CN2814073Y (en) * | 2005-09-13 | 2006-09-06 | 江阴市石油化工设备有限公司 | Non-side deviation constant force spring support |
| CN2867028Y (en) * | 2006-01-19 | 2007-02-07 | 中国石化工程建设公司 | High precision constant force spring supporting hanger frame |
| CN101419144A (en) * | 2008-11-25 | 2009-04-29 | 同济大学 | Micro-crack on site concrete strength detecting method and implementing device thereof |
| CN205298838U (en) * | 2015-12-17 | 2016-06-08 | 倍德力能源装备（江苏）有限公司 | Constant force spring hanger |
| CN108591622A (en) * | 2018-06-30 | 2018-09-28 | 扬州市泰克管道机械有限公司 | A kind of constant-force spring hanger |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113945455A (en) * | 2021-09-17 | 2022-01-18 | 广元市城建投资集团有限公司 | Quick assembly type concrete connection quality detection device |
| CN113945455B (en) * | 2021-09-17 | 2023-11-21 | 广元建工工业化建筑有限公司 | Quick assembly type concrete connection quality detection device |
| CN114486479A (en) * | 2022-01-26 | 2022-05-13 | 中国铁建重工集团股份有限公司 | Concrete strength detection device and method |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| Zhao et al. | Objective determination of crack initiation stress of brittle rocks under compression using AE measurement | |
| CN103344705B (en) | Method of measuring rock brittleness index through applying acoustic emission energy values | |
| CN107727483B (en) | Penetration shearing device and method for foundation in-situ test based on fiber bragg grating | |
| CN113075038A (en) | Concrete strength detection device and method based on actual drilling method | |
| US7690258B2 (en) | Buried pipe examining method | |
| WO2020135484A1 (en) | Device and method for detecting density of grouts in connecting structure of steel sleeve | |
| WO2013158933A1 (en) | Integration of digital image correlation with acoustic emissions | |
| EP3076153B1 (en) | Method for calculating an indenter area function and quantifying a deviation from the ideal shape of an indenter | |
| CN109253932B (en) | Variable-stiffness elastic energy storage device and method for testing rock instability by applying same | |
| CN102879266B (en) | Method for testing uniaxial compression elasticity modulus of inorganic binder stabilizing material | |
| CN106872581B (en) | Analysis method for fatigue crack propagation of welding sample based on magnesium alloy electron beam | |
| CN106223305B (en) | A kind of automatic dynamic driving instrument for considering energy correction and dynamic response | |
| CN107130651B (en) | The detection device and its detection method of anchor pole internal force exterior measuring | |
| CN113605887B (en) | Deep drilling complex environment local wall stress relief test method and system | |
| WO2010072133A1 (en) | On-site detector for foundation bearing capacity and filling compactness | |
| CN102809611A (en) | System and method for detecting damage of metal component nondestructively | |
| Colreavy et al. | Estimating consolidation parameters from field piezoball tests | |
| CN103760024A (en) | Method for objectively determining crack initiation strength of rock on basis of accumulated sound emission impact times | |
| CN107014705A (en) | A kind of method and system based on sound characteristic information prediction magnesium alloy sample fatigue limit | |
| CN103088850B (en) | Cycle friction sleeve barrel device for evaluating periodic load pile side friction | |
| Zhao et al. | Acoustic emission behaviors of the Beishan granite under uniaxial and triaxial compression conditions | |
| Wang et al. | Mechanical behavior and damage evolution for granite subjected to cyclic loading | |
| CN207798532U (en) | A kind of injection shear being used for ground in-situ test based on fiber grating | |
| CN206902781U (en) | The detection means of anchor pole internal force exterior measuring | |
| CN110567429A (en) | Device and method for measuring actual Poisson ratio of foundation soil body under lateral limit stress condition |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20210706 |
|
| RJ01 | Rejection of invention patent application after publication |