CN113819864A - Concrete strain measuring device - Google Patents
Concrete strain measuring device Download PDFInfo
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- CN113819864A CN113819864A CN202110971041.5A CN202110971041A CN113819864A CN 113819864 A CN113819864 A CN 113819864A CN 202110971041 A CN202110971041 A CN 202110971041A CN 113819864 A CN113819864 A CN 113819864A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B17/00—Measuring arrangements characterised by the use of infrasonic, sonic or ultrasonic vibrations
- G01B17/04—Measuring arrangements characterised by the use of infrasonic, sonic or ultrasonic vibrations for measuring the deformation in a solid, e.g. by vibrating string
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
- G05D23/00—Control of temperature
- G05D23/19—Control of temperature characterised by the use of electric means
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Abstract
The application relates to a concrete strain measuring device, which comprises a sensing piece, a measuring piece and a measuring piece, wherein the sensing piece is used for detecting the temperature of a concrete member core part in a pouring process and outputting a temperature detection signal; the temperature control water tank is used for heating or refrigerating the water body in the tank; the temperature controller is connected with the sensing piece and the temperature control module of the temperature control water tank, and is used for receiving a temperature detection signal of the sensing piece and controlling the temperature in the temperature control water tank regulating box body to be consistent with the temperature of the concrete member core part according to the received temperature detection signal; a supporting mechanism is arranged in a cavity of the temperature control water tank and used for placing a concrete test piece made of concrete with the same proportion as that of a concrete member; and a strain detection piece for detecting the strain of the core part of the concrete test piece is further arranged in the temperature control water tank. This application can effectually reduce the error when concrete strain detects.
Description
Technical Field
The application relates to the field of concrete experimental devices, in particular to a concrete strain measurement device.
Background
In order to accurately obtain the performance of the concrete after curing, at present, in the detection test of bridges and houses, the strain measurement of the concrete is a necessary measurement item, and the currently common method is to use a strain gauge or a strain gauge for detection.
In the prior art, the main steps of adopting a strain gauge or a strain gauge to detect the strain in the concrete curing process are as follows: in the concrete pouring process, the strain gauge or the strain gauge is bound to a steel bar in the concrete or is preset in the concrete member, and the internal temperature and the strain of the concrete in the curing process are directly detected in real time through the strain gauge or the strain gauge.
For the above prior art, the inventor thinks that in the actual detection process, because the poured concrete is restrained by the formwork and the external temperature of the concrete is inconsistent, the strain is inconsistent, so that there is a certain error between the actually detected data of the concrete member and the actual strain of the concrete member during the detection.
Disclosure of Invention
In order to reduce the error when doing the strain detection to the concrete of concrete member, this application provides a concrete strain measurement device.
The application provides a concrete strain measurement device adopts following technical scheme:
a concrete strain measuring device comprises
The sensor is used for detecting the temperature of the core part of the concrete member in the pouring process and outputting a temperature detection signal;
the temperature control water tank is used for heating or refrigerating the water body in the tank;
the temperature controller is connected with the sensing piece and the temperature control module of the temperature control water tank, and is used for receiving a temperature detection signal of the sensing piece and controlling the temperature in the temperature control water tank regulating box body to be consistent with the temperature of the concrete member core part according to the received temperature detection signal;
a supporting mechanism is arranged in a cavity of the temperature control water tank and used for placing a concrete test piece made of concrete with the same proportion as that of a concrete member; and a strain detection piece for detecting the strain of the core part of the concrete test piece is further arranged in the temperature control water tank.
By adopting the technical scheme, when the strain in the concrete needs to be detected, the temperature of the core part of the concrete member can be obtained only through the sensing piece, meanwhile, a concrete sample made of concrete with the same proportion as that of the concrete member is placed on a supporting mechanism to be freely and unrestrained, then the temperature of the core part of the concrete member is obtained through detection, the temperature of the water body in the temperature control water tank is adjusted through a temperature controller, so that the temperature of the water body in the temperature control water tank is consistent with the temperature of the core part of the concrete member, finally, the strain of the core part of the concrete test piece is detected in real time through the strain detection piece, in the process, the temperature of the outer part of the concrete sample is consistent with that of the core part, and no constraint of the template exists, therefore, the interference of the external environment and the constraint on the concrete strain detection is effectively reduced, and the error of the strain value of the detected concrete sample is reduced.
Optionally, the sensing element is a vibrating wire strain gauge capable of detecting temperature.
Through adopting above-mentioned technical scheme, not only can detect the strain value of concrete sample, can also obtain the strain value of concrete member to can obtain external environment and restraint and meet an emergency and detect the interference at different times to the concrete.
Optionally, the supporting mechanism includes a plurality of supporting units for supporting the bottom surface of the concrete sample, and the plurality of supporting units are spliced with each other.
Through adopting above-mentioned technical scheme, when doing the detection experiment, only need to arrange the concrete sample in the top surface of a plurality of supporting element and do the support to at the in-process of concrete sample solidification, the meeting an emergency of concrete sample leads to it to take place the inflation, can keep away from the position change that is the adaptability such as waiting through a plurality of supporting element mutually, in order to reduce the interference of making and producing the concrete sample production, thereby further reduce the interference to concrete strain detection, optimize strain detection's the degree of accuracy.
Optionally, the supporting unit includes that backup pad and at least one ball hinge in the supporting wheel of backup pad bottom surface, and is a plurality of the backup pad sets up of splicing each other, the supporting wheel is spherical structure, the supporting wheel butt in the diapire of the cavity in the control by temperature change water tank.
Through adopting above-mentioned technical scheme, the concrete sample is placed in the top surface of a plurality of backup pads and is done the support to in the concrete sample curing process, when the position adjustment of adaptability is done to a plurality of backup pads, can articulate the supporting wheel that does the arbitrary direction in the backup pad through the ball, with the influence that reduces the concrete strain detection.
Optionally, the bottom surface of backup pad is rotated and is connected with the supporting seat, the supporting seat rotates the diapire that the plane is on a parallel with control by temperature change water tank cavity, the supporting wheel is provided with into threely, the supporting wheel ball joint is in supporting seat.
Through adopting above-mentioned technical scheme, when three supporting wheel can make the backup pad do the support, the backup pad can have the stability of relative preferred through the support of three supporting wheel, reduces the possibility that the backup pad overturns in placing concrete or the use, stability when optimizing the use.
Optionally, a plurality of the support plates are provided with a plurality of fixing assemblies, so that the plurality of support plates can be detachably connected.
Through adopting above-mentioned technical scheme, fixed subassembly can dismantle the connection each other with a plurality of backup pads, can make alright go on the plane that a plurality of backup pads spliced each other and formed when concreting before the experiment, simultaneously after pouring the completion, still can make a plurality of backup pads break away from each other through fixed subassembly to when being convenient for carry out the detection experiment of meeting an emergency, can also reduce because of concrete sample transfer process causes the damage to concrete sample and to detect the interference that produces to the deformation.
Optionally, the fixed subassembly includes the dead lever and the elastic expansion strip of a plurality of axial mutual concatenations, the one end fixedly connected with connecting block of dead lever, the dead lever offer be used for with adjacent dead lever on connecting block complex connecting hole, the one end fixed connection of elastic expansion strip is in the pore wall of connecting hole, the other end fixed connection of elastic expansion strip is on the dead lever adjacent with the place dead lever, at least two mutually perpendicular's fixed orifices, adjacent two are seted up to the backup pad partial fixed orifices in the backup pad communicate each other, it is same the fixed orifices in a plurality of backup pads of part are worn to locate by a plurality of dead levers of fixed subassembly.
By adopting the technical scheme, in the process of pouring the concrete sample, only the plurality of fixing rods need to penetrate through the mutually communicated fixing holes on the plurality of supporting plates arranged along the same path, and because at least two mutually perpendicular fixing holes are arranged on the same supporting plate, the connecting block is inserted in the connecting hole, so that the displacement of the supporting plate along the extension direction of the fixing holes can be limited, namely the radial displacement of the supporting plate along the fixing rods is limited, and the integrity of the plurality of supporting plates is relatively better and is used for pouring the concrete sample; when pouring and need testing after accomplishing, only need to make the dead lever relatively fixed orifices of outermost end break away from, then tensile elastic expansion piece for the dead lever that breaks away from the backup pad can adjacent backup pad separation relatively, so that separate a plurality of backup pads relatively in proper order with a plurality of dead levers, it is comparatively convenient relatively to use, reduces the space of cavity in the required control by temperature change water tank.
Optionally, an avoidance block is clamped between every two adjacent support plates, a melting layer is coated on the outer wall of the avoidance block, the melting layer is made of a material with a melting point temperature lower than 50 ℃ and insoluble in water, and the fixing rod penetrates through the avoidance block.
Through adopting above-mentioned technical scheme, the melting layer can further increase the wholeness between a plurality of backup pads, the possibility that breaks away from each other when reducing the concreting test piece, and simultaneously, because it is exothermic to have hydration reaction among the concrete curing process, lead to the concrete curing in-process temperature is the highest more than can reaching 80 ℃, temperature in this in-process control by temperature change water tank can rise gradually and make the melting layer soften or melt, and make and dodge the relative backup pad of piece and break away from, leave required space for the displacement of backup pad, furthermore, can also be pouring the in-process through dodging the piece, make and keep the clearance setting between two adjacent backup pads.
Optionally, it is adjacent the side border in opposite directions of backup pad is the chamfer setting and the backup pad is the tip down, dodge the transversal isosceles trapezoid of personally submitting of piece and for the tip setting down.
By adopting the technical scheme, the avoidance block can be conveniently separated in the melting process of the melting layer.
In summary, the present application includes at least one of the following beneficial technical effects:
when the strain in the concrete needs to be detected, the temperature of the core part of the concrete member can be obtained only through the sensing piece, meanwhile, the concrete with the same proportion as the concrete of the concrete member is adopted to be made into a concrete sample on the upper surfaces of the plurality of supporting plates, the supporting mechanism is used for freely and unrestrained supporting the concrete sample, then the temperature of the core part of the concrete member is obtained through detection, the temperature of the water body in the temperature control water tank is adjusted through a temperature controller, so that the temperature of the water body in the temperature control water tank is consistent with the temperature of the core part of the concrete member, finally, the strain of the core part of the concrete test piece is detected in real time through the strain detection piece, in the process, the temperature of the outer part of the concrete sample is consistent with that of the core part, and no constraint of the template exists, therefore, the interference of the external environment and the constraint on the concrete strain detection is effectively reduced, and the error of the strain value of the detected concrete sample is reduced.
Drawings
Fig. 1 is a schematic structural diagram of an embodiment of the present application.
Fig. 2 is a schematic view of the installation structure of the temperature-controlled water tank and the supporting mechanism in the embodiment of the application.
Fig. 3 is a schematic view of the mounting structure of the support mechanism and the fixing member in the embodiment of the present application.
Fig. 4 is an enlarged schematic view of a portion a of fig. 3.
Fig. 5 is a schematic structural diagram of a support unit in an embodiment of the present application.
Figure 6 is a cross-sectional view of a fixation assembly along the axial direction of a fixation rod in an embodiment of the present application.
Description of reference numerals: 1. a sensing member; 11. a concrete member; 12. a concrete sample; 13. a first display; 2. a temperature control water tank; 21. a strain detection member; 211. a second display; 3. a temperature controller; 4. a support unit; 41. a support plate; 411. a fixing hole; 42. a support wheel; 43. a supporting seat; 44. avoiding blocks; 441. a melt layer; 45. a storage belt; 5. a fixing assembly; 51. fixing the rod; 511. connecting blocks; 512. connecting holes; 513. a receiving hole; 52. an elastic expansion strip.
Detailed Description
The present application is described in further detail below with reference to figures 1-6.
The embodiment of the application discloses concrete strain measurement device. Referring to fig. 1, the concrete strain measuring device includes an inductor 1, a temperature-controlled water tank 2 and a temperature controller 3.
The sensing member 1 is configured to detect a temperature of a core portion of the concrete member 11 during a casting process, and output a temperature detection signal, which may be a temperature sensor or a vibrating wire strain gauge capable of detecting a temperature, in this embodiment of the present application, the vibrating wire strain gauge. The concrete member 11 is a concrete structure of a cast building or a concrete test block formed by casting concrete, and when detection is performed, the sensing piece 1 is only required to be placed in the core part of the concrete member 11 before the building is completed.
And the temperature control water tank 2 is used for adjusting the temperature of the water body in the tank body, namely heating or refrigerating the water body in the tank body. The temperature control water tank 2 is a water tank provided with a temperature control module, the temperature control module comprises a heating element and a refrigerating element, and the temperature controller 3 is connected with the refrigerating element and the heating element and controls the heating element to heat or refrigerate the element and the like. In the embodiment of the present application, the cooling element is a refrigerator, such as a semiconductor refrigerator, and the heating element is an electric heater.
The temperature control water tank 2 further comprises a first temperature sensor for detecting the temperature of the water body in the tank body, the first temperature sensor is connected to the temperature controller 3, the temperature controller 3 receives a temperature detection signal of the first temperature sensor, and the temperature in the temperature control water tank 2 is judged to be alpha so as to feed back water temperature data for response control of the temperature controller 3.
Temperature controller 3 is connected in the temperature control module of response piece 1 and control by temperature change water tank 2, and temperature controller 3 receives the temperature detected signal of response piece 1 to obtain the contrast of temperature value according to receiving the temperature detected signal who comes from response piece 1 and first temperature sensor, the temperature value beta of the internal water body of temperature control module regulating box of 3 control by temperature controller 2, so that the temperature in the control by temperature change water tank 2 is unanimous with the temperature of the 11 cores of concrete member. Wherein, the sensing piece 1 is connected with a first display 13 for displaying the detected temperature value.
Referring to fig. 1, a temperature controller 3 receives a temperature detection signal from an inductor 1 to obtain a temperature value α inside a concrete member 11, and simultaneously, the temperature controller 3 receives a temperature control signal from a first temperature sensor inside a temperature control water tank 2 and obtains a temperature value β inside the temperature control water tank, the temperature controller 3 is provided with a preset temperature value, and the preset temperature value is the temperature value α detected by the first temperature sensor inside the temperature control water tank 2; when the temperature control module of the temperature control water tank 2 works, comparing alpha with beta; when alpha is larger than beta, the temperature controller 3 controls a refrigerating element of the temperature control module in the temperature control water tank 2 to refrigerate, so that alpha is beta; when alpha is less than beta, the temperature controller 3 controls a heating element of the temperature control module in the temperature control water tank 2 to heat, so that alpha is beta; when the α = β, the temperature controller 3 controls the heating element of the temperature control module in the temperature control water tank 2 to stop heating and the cooling element to stop cooling; so as to achieve the temperature of the environment in the temperature-controlled water tank 2 consistent with the temperature of the core part of the concrete member 11.
Still be provided with the supporting mechanism in the cavity of control by temperature change water tank 2 and be used for detecting the strain detection spare 21 that concrete sample 12 core meets an emergency, supporting mechanism is used for placing and supports concrete sample 12, and meets an emergency detection spare 21 and is connected with the second display 211 that is used for showing the temperature value that detects out, concrete sample 12 is the concrete test block that adopts the concrete that is the same proportion with the concrete of concreting component 11 to make the temperature variation of concrete component 11 and concrete sample 12 core be close or unanimous. The strain detector 21 is a strain gauge or a strain gauge, and is preferably a vibrating wire strain gauge.
When using, temperature controller 3 can detect out the temperature of concrete member 11 core through response 1, and the temperature of the water in 3 control temperature control water tank 2 through temperature controller, make the temperature of the water in the control temperature water tank 2 unanimous with the temperature of concrete member 11 core, thereby make the temperature of placing the concrete test piece 12 week side environment on the supporting mechanism and the temperature of concrete test piece 12 core be close to or unanimous, thereby effectual outside and the restraint of concrete test piece 12 self to meeting an emergency production of reducing, the actual meeting an emergency that can be close to the concrete relatively of meeting an emergency of the concrete test piece 12 that the detection piece 21 that meets an emergency this moment detected, thereby the effectual error that reduces the concrete strain detection time measuring to concrete member 11.
Referring to fig. 2 and 3, the supporting mechanism includes a plurality of supporting units 4 that are spliced with each other, and the supporting units 4 are used for relatively uniformly supporting the bottom surface of the concrete specimen 12.
The supporting unit 4 comprises a supporting plate 41 and at least one supporting wheel 42, the supporting wheel 42 is a spherical structure, the supporting wheel 42 can be one or more, and the supporting wheel 42 is spherically hinged on the bottom wall of the supporting plate 41, that is, the supporting wheel 42 is partially embedded in the supporting plate 41 and the supporting wheel 42 is in clearance fit with the supporting plate 41, so that the supporting wheel 42 can rotate in any direction relative to the supporting plate 41, therefore, in the process of detecting, the concrete sample 12 can drive the supporting plates 41 of the plurality of supporting units 4 to slightly move towards the strain direction in the process of strain displacement, at this time, the support wheels 42 can roll at any angle along the strain direction of the concrete specimen 12, so as to reduce the restriction and limitation of the support mechanism on the strain of the concrete bottom, therefore, the concrete sample 12 can be relatively closer to a free strain unconstrained state when being strained, and the detection result of the strain detection piece 21 is relatively more accurate.
In other embodiments, the supporting mechanism may also adopt a plurality of spherical rolling members, such as steel balls, and then a groove is formed in the bottom of the concrete sample 12, the inside of the groove is polished and lubricated, and the steel balls are placed at the bottom of the groove for supporting the concrete sample 12 and enabling the concrete sample 12 to be in a free strain unconstrained state.
Referring to fig. 3 and 4, in order to further reduce the restriction from the support plate 41 when the concrete sample 12 is strained, the bottom wall of the support plate 41 is rotatably connected with a support seat 43, and the rotating plane of the support seat 43 is parallel to the bottom wall of the cavity in the temperature-controlled water tank 2. In the embodiment of the present application, there are three support wheels 42, the support wheels 42 are spherically hinged to the support seat 43, and the distribution center of the three support wheels 42 on the same support seat 43 is eccentric or coincident with the rotation axis of the support seat 43.
When its middle part supporting wheel 42 is hindered because of rolling friction is great or run into the barrier and lead to rolling, can reach the effect that the position changed through the rotation of supporting seat 43, can also reduce the backup pad 41 and do the hindrance that the position changed and received through supporting wheel 42, three supporting wheel 42 can also be comparatively stable relatively and do the support to backup pad 41 simultaneously for every support element 4 can independently stabilize and must do the support.
Referring to fig. 3, 4 and 5, the plurality of support plates 41 are further provided with a fixing assembly 5 for enabling the plurality of support plates 41 to be detachably connected, the fixing assembly 5 is provided with a plurality of fixing assemblies 5, so that the concrete test piece 12 can be manufactured on the top surfaces of the plurality of support plates 41, when experimental maintenance needs to be performed through the temperature control water tank 2 after manufacturing is completed, the plurality of support plates 41 are enabled to be not interfered with each other through the fixing assemblies 5, the concrete test piece 12 can be in a state that strain is not restrained, the possibility that the concrete test piece 12 needs to be manufactured again due to damage in the transferring process is reduced, meanwhile, the process closer to concrete curing can be simulated, and the error of strain detection of the strain detection piece 21 is further reduced.
Referring to fig. 4, 5 and 6, the fixing assembly 5 includes a plurality of fixing rods 51 and a plurality of elastic expansion bars 52, the plurality of fixing rods 51 are distributed along the axial direction and are spliced with each other, and the plurality of elastic expansion bars 52 are respectively arranged at positions between two adjacent fixing rods 51 in a one-to-one correspondence manner. One end of the fixed rod 51 is fixedly connected with a connecting block 511, the connecting block 511 can be selected from a cylindrical structure, a polygonal prism structure, an adjusting structure or a hemispherical structure, in the embodiment of the application, the connecting block 511 is a hemispherical structure, and the connecting block 511 and the fixed rod 51 are arranged on the same central axis.
Referring to fig. 4 and 6, the other end of the fixing rod 51 is provided with a connecting hole 512 for being matched with the connecting block 511, one end of the elastic expansion bar 52 is fixedly connected to the hole wall of the connecting hole 512, the other end of the elastic expansion bar 52 is fixedly connected to the fixing rod 51 adjacent to the fixing rod 51 at the hole wall of the connecting hole 512, and the elastic expansion bar 52 is in a stretching state. Wherein, set up in the dead lever 51 and accomodate hole 513, the opening of accomodating hole 513 is located the one end at connecting block 511 place on the dead lever 51, and accomodates hole 513 and dead lever 51 and set up with the central axis, and the one end fixed connection in the pore wall of accomodating hole 513 of the pore wall of connecting hole 512 is kept away from to elastic expansion bar 52.
Referring to fig. 4 and 6, a plurality of fixing holes 411 are formed in the supporting plate 41, the fixing holes 411 are divided into two groups, the extending directions of the two groups of fixing holes 411 are perpendicular to each other, and the extending directions of the fixing holes 411 are parallel to the rotation plane of the supporting seat 43. And the two sets of fixing holes 411 are respectively located at different positions in the thickness direction of the supporting plate 41, so that the two sets of fixing holes 411 do not interfere with each other. The plurality of support plates 41 are arranged in an array in the longitudinal and transverse directions, wherein a group of fixing holes 411 on the plurality of support plates 41 arranged in the same longitudinal path are communicated with each other; another set of fixing holes 411 of the plurality of support plates 41 arranged in the same horizontal path are disposed to communicate with each other.
In the embodiment of the present application, the supporting plate 41 is provided with two fixing holes 411 with mutually perpendicular extending directions, and the two fixing holes 411 are provided at different positions of the supporting plate 41 along the thickness direction, and two ends of the extending direction of the fixing holes 411 are respectively communicated with one fixing hole 411 on two supporting plates 41 adjacent to each other along the extending direction of the fixing hole 411 on the supporting plate 41. The fixing rods 51 of the same fixing assembly 5 are inserted into the mutually communicating fixing holes 411 of the supporting plates 41 arranged along the same path in the longitudinal or transverse direction.
When the concrete test piece 12 is poured on the upper surfaces of the plurality of support plates 41, the connecting blocks 511 are inserted into the connecting holes 512 of the adjacent fixing rods 51 to limit the displacement of the two adjacent support plates 41 along the radial direction of the fixing rods 51, so that the plurality of support plates 41 form a whole, and the possibility of separating the plurality of support plates 41 when the concrete test piece 12 is poured is reduced; meanwhile, when maintenance is needed, only the fixing rod 51 needs to be separated from the supporting plate 41 located at the edge position relatively, then the elastic expansion strip 52 is stretched, so that the connecting block 511 on the fixing rod 51 separated from the supporting plate 41 is separated from the connecting hole 512 relatively inserted, and then the fixing rod 51 separated from the fixing rod is bent, so that the fixing component 5 is separated from a plurality of supporting plates 41 relatively, and influence on subsequent strain detection is avoided.
In other embodiments, the fixing component 5 may also adopt a hoop, and the plurality of supporting plates 41 are fastened together, and the fixing component 5 is unfastened during the curing process; in addition, the fixing assembly 5 may also fixedly connect the fixing plate to the adjacent two support plates 41 by using bolts.
Referring to fig. 4 and 6, in order to reduce interference caused by mutual interference between the plurality of support plates 41 during strain on the strain of the concrete sample 12, an avoiding block 44 is interposed between any two adjacent support plates 41, an outer wall of the avoiding block 44 is coated with a melting layer 441, and a side edge of the support plate 41 in the circumferential direction is also coated with the melting layer 441 along the outer wall, and the melting layer 441 is made of a material having a melting point temperature of less than 50 ℃ and being insoluble in water, such as paraffin having a melting point of less than 50 ℃, benzoic anhydride crystals, lanolin, and the like, and preferably paraffin having a melting point of less than 50 ℃, such as soft wax. Wherein, the fixed rod 51 is arranged through the avoidance block 44.
The cross section of the avoiding block 44 is isosceles trapezoid, and the small end faces to the side far away from the concrete sample 12, namely the small end of the avoiding block 44 faces downwards. Preferably, the outer walls of the facing sides of two adjacent supporting plates 41 are chamfered, and the small ends of the supporting plates 41 are downward.
When the device is used, the plurality of support plates 41 can be relatively tightly combined together through the melting layer 441, so that the stability of the concrete sample 12 during pouring is further optimized; meanwhile, in the subsequent curing process, in the process of curing the concrete, heat is released due to hydration reaction, so that the temperature of the core part of the concrete member 11 can reach more than 80 ℃, the temperature in the temperature control water tank 2 can exceed the melting point of the melting layer 441, the melting layer 441 can be melted during curing, the fixing rod 51 is separated from the supporting plate 41, the avoiding block 44 can separate the two supporting plates 41 clamped by the avoiding block relatively, a space with changed positions is provided for the supporting plate 41 to follow the strain of the concrete test piece 12, and the influence on the strain detection of the concrete test piece 12 can be reduced when the supporting plate 41 is convenient to pour the concrete test piece 12.
In addition, a plurality of receiving belts 45 for receiving the avoidance blocks 44 are further disposed between any two adjacent support plates 41, and the receiving belts 45 are made of flexible materials, such as cloth belts, rubber belts, plastic belts, and the like. Both ends of the storage belt 45 are connected to the adjacent two support plates 41, respectively, and the storage belt 45 is positioned below the escape block 44. Preferably, at least two storage belts 45 are arranged below the gap between two adjacent support plates 41, the length of each storage belt 45 is greater than the distance between the fixing points of the storage belts 45 fixedly connected to the two adjacent support plates 41, and two ends of each storage belt 45 are respectively rotatably connected to the two adjacent support plates 41.
In the detection process, when the temperature in the temperature control water tank 2 is higher than the melting point of the melting layer 441, the melting layer 441 is melted or softened, so that the avoiding block 44 is separated from the support plate 41, at the moment, the plurality of accommodating belts 45 can accommodate the avoiding block 44, and the possibility that the avoiding block 44 obstructs the support wheel 42 on the support seat 43 to roll is reduced.
The above embodiments are preferred embodiments of the present application, and the protection scope of the present application is not limited by the above embodiments, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.
Claims (9)
1. A concrete strain measurement device is characterized in that: comprises that
The sensor (1) is used for detecting the temperature of the core part of the concrete member (11) in the pouring process and outputting a temperature detection signal;
the temperature control water tank (2) is used for heating or refrigerating the water body in the tank;
the temperature controller (3) is connected with the temperature control modules of the induction piece (1) and the temperature control water tank (2) and is used for receiving a temperature detection signal of the induction piece (1) and controlling the temperature control water tank (2) to adjust the temperature in the tank body to be consistent with the temperature of the core part of the concrete member (11) according to the received temperature detection signal;
a supporting mechanism is arranged in a cavity of the temperature control water tank (2), and is used for placing a concrete test piece (12) made of concrete with the same proportion as the concrete member (11); and a strain detection piece (21) for detecting the core strain of the concrete test piece (12) is further arranged in the temperature control water tank (2).
2. A concrete strain measuring device according to claim 1, wherein: the sensing piece (1) is a vibrating wire type strain gauge capable of detecting temperature.
3. A concrete strain measuring device according to claim 1, wherein: the supporting mechanism comprises a plurality of supporting units (4) used for supporting the bottom surface of the concrete sample (12), and the supporting units (4) are mutually spliced.
4. A concrete strain measuring device according to claim 3, wherein: support unit (4) include backup pad (41) and at least one ball hinge in backup pad (41) bottom surface supporting wheel (42), a plurality of backup pad (41) splice the setting each other, supporting wheel (42) are spherical structure, supporting wheel (42) butt in the diapire of the cavity in control by temperature change water tank (2).
5. A concrete strain measuring device according to claim 4, wherein: the bottom surface of backup pad (41) is rotated and is connected with supporting seat (43), supporting seat (43) rotation plane is on a parallel with the diapire of control by temperature change water tank (2) cavity, supporting wheel (42) are provided with into threely, supporting wheel (42) ball joint is in supporting seat (43).
6. A concrete strain measuring device according to claim 4, wherein: the plurality of support plates (41) are provided with a fixing component (5) which enables the plurality of support plates (41) to be detachably connected, and the fixing component (5) is provided with a plurality of support plates.
7. A concrete strain measuring device according to claim 6, wherein: the fixing component (5) comprises a plurality of fixing rods (51) and elastic telescopic strips (52) which are axially spliced with each other, one end of each fixing rod (51) is fixedly connected with a connecting block (511), each fixing rod (51) is provided with a connecting hole (512) which is matched with the connecting block (511) on the adjacent fixing rod (51), one end of the elastic expansion bar (52) is fixedly connected with the hole wall of the connecting hole (512), the other end of the elastic expansion strip (52) is fixedly connected on the fixing rod (51) adjacent to the fixing rod (51), at least two vertical fixing holes (411) are formed in the supporting plate (41), part of the fixing holes (411) in the two adjacent supporting plates (41) are communicated with each other, and a plurality of fixing rods (51) of the same fixing component (5) penetrate through the fixing holes (411) in the plurality of supporting plates (41).
8. A concrete strain measuring device according to claim 7, wherein: an avoidance block (44) is clamped between every two adjacent support plates (41), a melting layer (441) is coated on the outer wall of the avoidance block (44), the melting layer (441) is made of a material with a melting point temperature smaller than 50 ℃ and insoluble in water, and the fixing rod (51) is further arranged in the avoidance block (44) in a penetrating mode.
9. A concrete strain measuring device according to claim 8, wherein: adjacent opposite side edges of the support plate (41) are arranged in a chamfer mode, the support plate (41) is arranged with a small end facing downwards, and the cross section of the avoiding block (44) is in an isosceles trapezoid shape and arranged with the small end facing downwards.
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