A method for manufacturing a concrete specimen containing a sensor

Abstract

The present invention relates to a method for making a concrete specimen containing a sensor and the concrete specimen, the method comprising the following steps: calculating the number of sensors and their positions required according to the measurement requirements inside the concrete specimen; setting the size of the concrete prism so that the height of the concrete prism is the same as the casting depth of the concrete specimen, and the cross-sectional area perpendicular to the height on the concrete prism can cover any projection area of ​​one of the sensors; designing the height position of the sensor on the concrete prism according to the required depth position of the sensor; casting a template of the concrete prism with the sensor embedded in it to form a concrete prism; vertically arranging the concrete prism in the template of the concrete specimen according to the required horizontal position of the sensor; casting the template of the concrete specimen to form a concrete specimen containing the sensor. The present invention solves the problem in the prior art that the position of the sensor in the concrete specimen cannot be accurately arranged and the data measurement is inaccurate.

Description

Technical Field

[0001] The invention relates to the technical field of civil engineering, and in particular to a method for manufacturing a concrete specimen containing a sensor and the concrete specimen. Background Art

[0002] In the research and design of reinforced concrete structures, the temperature distribution inside the concrete structure under high temperature is an important parameter. Burying temperature sensors such as thermocouples at different depths inside the concrete is the main means to obtain the temperature variation law inside the concrete structure.

[0003] However, in the production of concrete specimens, it is difficult to accurately arrange and position the sensors because the concrete has a certain fluidity after pouring. Some researchers embedded steel bars during the test and then fixed the temperature sensors by tying them to the steel bars. Although this method can fix the temperature sensors, the thermal conductivity of steel bars and concrete is very different. The temperature measured by the temperature sensor is easily affected by the adjacent steel bars, resulting in inaccurate measurement results. Other researchers turned to PVC materials and carbon fiber tubes to position the temperature sensors to replace steel bars with higher thermal conductivity, but this method requires the sensors to be fixed by organic adhesives. At present, the actual effects of PVC materials, carbon fiber tubes, and organic adhesives on temperature measurement are unknown.

[0004] Therefore, it is necessary to provide a method for manufacturing a concrete specimen containing a sensor and a concrete specimen, which can simply, reasonably and accurately arrange and position the sensors in the concrete specimen. Summary of the invention

[0005] The object of the present invention is to provide a method for manufacturing a concrete specimen containing a sensor and a concrete specimen, so as to solve the problem in the prior art that the position of the sensor in the concrete specimen cannot be accurately arranged and the data measurement is inaccurate.

[0006] In order to solve the problems existing in the prior art, the present invention provides a method for making a concrete specimen containing a sensor, comprising the following steps:

[0007] Calculate the number of sensors and their locations required based on the measurement requirements inside the concrete specimen;

[0008] Setting the size of the concrete prism so that the height of the concrete prism is the same as the casting depth of the concrete specimen, and the cross-sectional area of ​​the concrete prism perpendicular to the height can cover any projection area of ​​one of the sensors;

[0009] Designing the height position of the sensor on the concrete prism according to the required depth position of the sensor;

[0010] Laying the template of the concrete prism flat, arranging the sensor at a designed height position in the template of the concrete prism, casting the template of the concrete prism flat, and removing the template after reaching the curing strength to form the concrete prism;

[0011] The concrete prism is vertically arranged in the template of the concrete specimen according to the required horizontal position of the sensor, the template of the concrete specimen is cast, and the template is removed after the curing strength is reached to form a concrete specimen containing the sensor.

[0012] Optionally, in the method for manufacturing the sensor-containing concrete specimen, calculating the number of required sensors and their positions includes:

[0013] Calculate the total number of sensors required and the horizontal and depth positions of each sensor based on the measurement requirements.

[0014] Optionally, in the method for manufacturing the sensor-containing concrete specimen, if the sensor is required at different depths at the same horizontal position, a plurality of the sensors are arranged in one concrete prism.

[0015] Optionally, in the method for manufacturing the sensor-containing concrete specimen, the cross section of the concrete prism perpendicular to the height is a square with a side length of 100 mm to 150 mm.

[0016] Optionally, in the method for making the sensor-containing concrete specimen, before casting the formwork of the concrete prism, the wires of the sensors are embedded so that they can be connected to a data collector with a compatible signal format.

[0017] Optionally, in the method for manufacturing the sensor-containing concrete specimen, the concrete specimen includes an engineering component or a test specimen.

[0018] Optionally, in the method for preparing the sensor-containing concrete specimen, the sensor includes a temperature sensor.

[0019] The present invention also provides a concrete specimen, which is an engineering component or a test specimen, comprising:

[0020] At least one prefabricated concrete prism vertically disposed in the concrete specimen, the height of the concrete prism being the same as the casting depth of the concrete specimen, and the cross-sectional area of ​​the concrete prism perpendicular to the height being able to cover any projected area of ​​a sensor;

[0021] A sensor embedded in the concrete prism;

[0022] The concrete and steel reinforcement structure forming the concrete specimen is poured.

[0023] Optionally, in the concrete specimen,

[0024] Calculating the total number of sensors required and the horizontal position and depth position of each sensor according to the measurement requirements inside the concrete specimen;

[0025] Disposing sensors of corresponding height in the concrete prism according to the required depth position of the sensors;

[0026] The position of the concrete prism within the concrete specimen is set according to the required horizontal position of the sensor.

[0027] Optionally, in the concrete specimen, the sensor is also provided with a wire that enables the sensor to be connected to a data collector with a signal format that conforms to the sensor.

[0028] Compared with the prior art, the present invention has the following beneficial effects:

[0029] (1) The sensor is embedded in the concrete prism. On the one hand, the concrete prism itself has a certain weight, which can reduce the influence of concrete flow and vibration on the precise positioning of the sensor during the pouring of the concrete specimen; on the other hand, the concrete prism itself is poured in a flat position, which can better control the influence of gravity in the depth direction on the installation and positioning of the sensor;

[0030] (2) Wide application range: the concrete prism cast by the present invention is applicable to various concrete engineering components, such as beams, slabs and columns, etc. in actual engineering. In addition, the concrete prism is also suitable for indoor tests and has a wide application range;

[0031] (3) The degree of prefabrication of the structure is improved. The relatively complex sensor positioning is extracted separately and the sensor is embedded in the concrete prism. The operation is relatively simple and the degree of prefabrication of the structure is improved.

[0032] (4) The concrete prism of the embedded sensor is easy to cast, simple to operate, firmly positioned, low in cost, easy to stack and manage, and has wide practicality;

[0033] (5) A wide range of measurement types. A variety of different sensors can be set according to actual needs, such as temperature sensors and pressure sensors, which can measure a variety of different types of data, facilitating measurements in scientific research design and actual engineering. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 A flowchart of a manufacturing method provided by an embodiment of the present invention;

[0035] Figure 2 A structural diagram of a concrete specimen containing a sensor provided in an embodiment of the present invention;

[0036] Figure 3 A structural diagram of a concrete prism provided in an embodiment of the present invention;

[0037] Figure 4 A structural diagram of a concrete prism provided in an embodiment of the present invention.

[0038] Among them, 10 is a concrete specimen; 11 is a template of the concrete specimen; 20 is a concrete prism; 21 is a template of the concrete prism; 30 is a sensor; 31 is a wire. DETAILED DESCRIPTION

[0039] The specific implementation of the present invention will be described in more detail below in conjunction with the schematic diagram. The advantages and features of the present invention will become clearer based on the following description. It should be noted that the drawings are all in a very simplified form and are not in exact proportions, and are only used to facilitate and clearly assist in explaining the purpose of the embodiments of the present invention.

[0040] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0041] In the production of existing concrete specimens, it is difficult to accurately arrange and position sensors because concrete has a certain fluidity after pouring. Some researchers position temperature sensors by embedding steel bars, PVC materials and carbon fiber tubes during experiments. Although this method can fix the temperature sensor, the actual impact on temperature measurement is unknown.

[0042] Therefore, it is necessary to provide a method for making a concrete specimen containing a sensor, such as Figure 1-4 As shown, the manufacturing method comprises the following steps:

[0043] Calculate the number and positions of the required sensors 30 according to the measurement requirements inside the concrete specimen 10;

[0044] The size of the concrete prism 20 is set so that the height of the concrete prism 20 is the same as the casting depth of the concrete specimen 10, and the cross-sectional area perpendicular to the height of the concrete prism 20 can cover any projection area of ​​one sensor 30;

[0045] Designing the height position of the sensor 30 on the concrete prism 20 according to the required depth position of the sensor 30;

[0046] Laying the concrete prism template 21 flat, arranging the sensor 30 at a designed height position in the concrete prism template 21, casting the flat concrete prism template 21, and removing the template after reaching the curing strength to form the concrete prism 20;

[0047] The concrete prism 20 is vertically arranged in the template 11 of the concrete specimen according to the required horizontal position of the sensor 30 , and the template 11 of the concrete specimen is cast. After the curing strength is reached, the template is removed to form the concrete specimen 10 containing the sensor 30 .

[0048] The present invention sets the size of the concrete prism 20 by measuring the size of a specific concrete specimen 10, and then casts the concrete prism 20 with the embedded sensor 30. The concrete prism 20 has the advantages of convenient casting, simple operation, firm positioning, low cost, easy stacking management, etc., and has great development prospects.

[0049] Further, calculating the number of sensors 30 required and their positions includes: calculating the total number of sensors 30 required and the horizontal position and depth position of each sensor 30 according to the measurement requirements. Preferably, if the sensor 30 is required at different depths at the same horizontal position, a plurality of sensors 30 are arranged in one concrete prism 20.

[0050] Typically, before pouring the formwork 21 of the concrete prism, the wire 31 of the sensor 30 is pre-buried so that it can be connected to a data collector with a compatible signal format.

[0051] Preferably, the sensor 30 includes but is not limited to a temperature sensor and a pressure sensor.

[0052] In one embodiment, according to Figure 2-4 As shown,

[0053] According to the requirement of pre-embedded sensors 30 in the concrete specimen 10, the number of required sensors 30 and their positions are calculated, for example, according to the internal measurement requirements of the engineering component or the test specimen; and the size of the concrete prism 20 is set. Generally speaking, if the engineering component is a plate, the height of the concrete prism 20 is equal to the thickness of the plate; if the engineering component is a beam, the height of the concrete prism 20 is equal to the height of the beam, and the cross-section of the concrete prism 20 perpendicular to the height is a square with a side length of 100 mm to 150 mm, which can only accommodate one sensor 30, so as to reduce the influence of concrete flow and vibration during the pouring process on the precise positioning of the sensor 30.

[0054] Next, the height position of the sensor 30 on the concrete prism 20 is designed according to the required depth position of the sensor 30 and marked, such as Figure 3 As shown, if three sensors 30 need to be arranged in the pouring depth direction, they can be marked as h1, h2, and h3 respectively on the template 21 of the concrete prism.

[0055] The sensors 30 are placed at the marked positions (h1, h2, h3) in sequence, and then the concrete prism 20 is cast; the curing conditions of the concrete prism 20 are consistent with those of the concrete specimen 10, and the mold is generally removed after the curing time reaches more than 7 days. After the demolding, the concrete prism 20 with the embedded sensor 30 is as follows: Figure 4 shown.

[0056] Next, the concrete prism 20 is vertically arranged in the template 11 of the concrete specimen according to the required horizontal position of the sensor 30, and the wires 31 of the pre-embedded sensor 30 in the concrete prism 20 are arranged so that they can be subsequently connected to a data collector with a matching signal format.

[0057] Finally, concrete is poured into the formwork 11 of the concrete specimen in which the concrete prism 20 is placed, and then cured. After the curing is completed, the arrangement and positioning of the internal sensor 30 of the concrete specimen 10 is completed.

[0058] The present invention also provides a concrete specimen 10, such as Figure 2-4 As shown, the concrete specimen 10 is an engineering component or a test specimen, comprising:

[0059] At least one prefabricated concrete prism 20 vertically disposed in the concrete specimen 10, wherein the height of the concrete prism 20 is the same as the casting depth of the concrete specimen 10, and the cross-sectional area perpendicular to the height of the concrete prism 20 can cover any projection area of ​​a sensor 30;

[0060] A sensor 30 embedded in the concrete prism 20;

[0061] The concrete and steel bar structure of the concrete specimen 10 is cast.

[0062] Preferably, if the engineering component is a plate, the height of the concrete prism 20 is equal to the thickness of the plate; if the engineering component is a beam, the height of the concrete prism 20 is equal to the height of the beam, and the cross-section of the concrete prism 20 perpendicular to the height is a square with a side length of 100 mm to 150 mm, which can only accommodate one sensor 30 to reduce the impact of concrete flow and vibration during pouring on the precise positioning of the sensor 30.

[0063] Preferably, the total number of sensors 30 required and the horizontal position and depth position of each sensor 30 are calculated according to the measurement requirements inside the concrete specimen 10;

[0064] A sensor 30 having a corresponding height is arranged in the concrete prism 20 according to the required depth position of the sensor 30;

[0065] The position of the concrete prism 20 within the concrete specimen 10 is set according to the desired horizontal position of the sensor 30 .

[0066] Furthermore, the sensor 30 is also provided with a wire 31 that enables the sensor 30 to be connected to a data collector with a signal format that matches the sensor 30 .

[0067] In one embodiment, the concrete prism 20 contains at least one sensor 30 , and the sensor 30 includes but is not limited to a temperature sensor and a pressure sensor.

[0068] Compared with the prior art, the present invention has the following beneficial effects:

[0069] (1) The sensor is embedded in the concrete prism. On the one hand, the concrete prism itself has a certain weight, which can reduce the influence of concrete flow and vibration on the precise positioning of the sensor during the pouring of the concrete specimen; on the other hand, the concrete prism itself is poured in a flat position, which can better control the influence of gravity in the depth direction on the installation and positioning of the sensor;

[0070] (2) Wide application range: the concrete prism cast by the present invention is applicable to various concrete engineering components, such as beams, slabs and columns, etc. in actual engineering. In addition, the concrete prism is also suitable for indoor tests and has a wide application range;

[0071] (3) The degree of prefabrication of the structure is improved. The relatively complex sensor positioning is extracted separately and the sensor is embedded in the concrete prism. The operation is relatively simple and the degree of prefabrication of the structure is improved.

[0072] (4) The concrete prism of the embedded sensor is easy to cast, simple to operate, firmly positioned, low in cost, easy to stack and manage, and has wide practicality;

[0073] (5) A wide range of measurement types. A variety of different sensors can be set according to actual needs, such as temperature sensors and pressure sensors, which can measure a variety of different types of data, facilitating measurements in scientific research design and actual engineering.

[0074] The above is only a preferred embodiment of the present invention and does not limit the present invention in any way. Any technician in the relevant technical field, without departing from the scope of the technical solution of the present invention, makes any form of equivalent replacement or modification to the technical solution and technical content disclosed in the present invention, which does not depart from the content of the technical solution of the present invention and still falls within the protection scope of the present invention.

Claims

1. A method for making a concrete specimen containing a sensor, characterized in that: The following steps are involved: Calculate the number of sensors and their locations required based on the measurement requirements inside the concrete specimen; Setting the size of the concrete prism so that the height of the concrete prism is the same as the casting depth of the concrete specimen, and the cross-sectional area of ​​the concrete prism perpendicular to the height can cover any projection area of ​​one of the sensors; Designing the height position of the sensor on the concrete prism according to the required depth position of the sensor; Laying the template of the concrete prism flat, arranging the sensor at a designed height position in the template of the concrete prism, casting the template of the concrete prism flat, and removing the template after reaching the curing strength to form the concrete prism; The concrete prism is vertically arranged in the template of the concrete specimen according to the required horizontal position of the sensor, the template of the concrete specimen is cast, and the template is removed after the curing strength is reached to form a concrete specimen containing the sensor.

2. The method for making a concrete specimen containing a sensor according to claim 1, characterized in that: Calculating the number of sensors required and their locations includes: Calculate the total number of sensors required and the horizontal and depth positions of each sensor based on the measurement requirements.

3. The method for making a concrete specimen containing a sensor according to claim 2, characterized in that: If the sensors are required at different depths at the same horizontal position, a plurality of the sensors are arranged in one concrete prism.

4. The method for making a concrete specimen containing a sensor according to claim 1, characterized in that: The cross section of the concrete prism perpendicular to the height is a square with a side length of 100 mm to 150 mm.

5. The method for making a concrete specimen containing a sensor according to claim 1, characterized in that: Before pouring the formwork of the concrete prism, the wires of the sensors are embedded so that they can be connected to a data collector with a signal format that matches the sensor format.

6. The method for making a concrete specimen containing a sensor according to claim 1, characterized in that: The concrete specimen includes an engineering component or a test specimen.

7. The method for making a concrete specimen containing a sensor according to claim 1, characterized in that: The sensor comprises a temperature sensor.

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