Structural strength detection device and concrete structure strength detection method

Abstract

The invention belongs to the technical field of road and bridge construction, and discloses a structural strength detection device and a concrete structure strength detection method. The structural strength detection device comprises a pre-embedded frame, a strain gauge and a strain acquisition device, the pre-embedded frame comprises a fixed rod and a plurality of support rods, the plurality of support rods are all embedded in a to-be-detected structure, and the fixed rod is also embedded in the to-be-detected structure and is fixedly connected with the plurality of support rods respectively; the strain gauges are arranged on the supporting rods; and the strain acquisition device is connected with the strain gauge and is used for measuring a dependent variable value. The structural strength detection device is simple in structure and convenient to install, is poured into a whole with a to-be-detected structure, is provided with a plurality of detection points, can reduce the influence on the concrete filling effect, and is accurate in measurement result and low in detection cost. According to the structure strength detection method, multi-point detection can be carried out on different positions of the to-be-detected structure at the same time, the detection cost is reduced, and the detection accuracy is improved.

Description

Technical Field

[0001] The invention relates to the technical field of road and bridge construction, and in particular to a structural strength detection device and a concrete structure strength detection method. Background Art

[0002] In order to test whether the concrete structure can reach the expected strength after solidification, it is necessary to conduct strength testing on the poured concrete structure. The commonly used testing method is to bury a vibrating wire strain gauge in the concrete structure and obtain the strength of the structure by measuring the strain inside the structure.

[0003] However, the detection method using vibrating-wire strain gauges is expensive and requires a larger operating space. In a narrow steel box structure partially filled with concrete, the concrete filling space is limited and the vibrating-wire strain gauge cannot be fully buried, resulting in lower accuracy of the measurement results. In addition, since the vibrating-wire strain gauge is pre-buried, it is not convenient to pour and fill the concrete, which in turn affects the porosity and density of the filled concrete. Summary of the invention

[0004] The purpose of the present invention is to provide a structural strength detection device and a concrete structure strength detection method, which have a simple structure, are easy to install, and can reduce the impact on the concrete filling effect.

[0005] To achieve this object, the present invention adopts the following technical solutions:

[0006] Structural strength testing device, comprising:

[0007] The embedded frame includes a fixing rod and a plurality of supporting rods, wherein the plurality of supporting rods are embedded in the structure to be tested, and the fixing rod is also embedded in the structure to be tested and is fixedly connected to the plurality of supporting rods respectively;

[0008] A strain gauge, wherein the strain gauge is arranged on the support rod;

[0009] A strain collection device is connected to the strain gauge, and is used to measure the strain value.

[0010] Preferably, a plurality of the support rods are arranged along the length direction of the structure to be measured, and the distance between two adjacent support rods is equal.

[0011] Preferably, the fixing rod is fixedly connected to a steel box for accommodating the structure to be tested.

[0012] The concrete structure strength testing method, using the above-mentioned structural strength testing device, comprises the following steps:

[0013] S1, bonding the strain gauge to the support rod;

[0014] S2, fixing and connecting the plurality of support rods to the fixing rod respectively;

[0015] S3, respectively lead out the wires of the plurality of strain gauges to the steel box for casting the structure to be measured, and respectively connect the plurality of wires to the strain acquisition device;

[0016] S4, pouring concrete into the steel box;

[0017] S5. After the concrete solidifies to form the structure to be tested, a load is applied to the structure to be tested, and the strain value is obtained through the strain acquisition device.

[0018] Preferably, before step S4, the method further includes:

[0019] The fixing rod is fixedly connected to the steel box.

[0020] Preferably, step S2 specifically includes:

[0021] A plurality of the support rods are welded to the fixing rod at equal intervals.

[0022] Preferably, step S4 further includes:

[0023] The concrete in the steel box is vibrated.

[0024] The beneficial effects of the present invention are:

[0025] The structural strength detection device provided by the present invention comprises an embedded frame, a strain gauge and a strain collection device. The embedded frame is embedded in the structure to be tested. Since the strain gauge is arranged on the support rod of the embedded frame, and the strain gauge is connected to the external strain collection device, when the structure to be tested is subjected to a load, the strain gauge on the support rod can transmit the deformation at the support rod position in the structure to be tested to the strain collection device, thereby accurately measuring the strain value of the structure to be tested at the corresponding position, and further obtaining the strength at the position; since the embedded frame has a plurality of support rods, each support rod is provided with a strain gauge, so that strength detection can be performed at a plurality of different points in the structure to be tested, thereby obtaining a more accurate and comprehensive measurement result; since the fixed rod and the plurality of support rods are all embedded in the structure to be tested, and the fixed rod is respectively fixedly connected to the plurality of support rods, the fixed rod can play a positioning role for the support rod during casting, thereby preventing the support rod from being displaced during casting, thereby ensuring that the specified position of the structure to be tested can be accurately measured. The structural strength detection device has a simple structure and is easy to install. It is cast as a whole with the structure to be detected and has multiple detection points, which can reduce the impact on the concrete filling effect. The measurement result is accurate and the detection cost is low.

[0026] By using the concrete structure strength detection method, the structural strength detection device can be completely buried in the structure to be tested, and the impact on the casting effect of the structure to be tested is greatly reduced. In addition, since multiple support rods are connected to the fixed rod, and strain gauges are provided on the multiple support rods, the concrete structure strength detection method can perform multi-point detection on different positions of the structure to be tested at the same time, thereby reducing the detection cost and improving the detection accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a schematic diagram of the structure of a structural strength detection device provided in a specific embodiment of the present invention.

[0028] In the figure:

[0029] 100-structure to be tested;

[0030] 1-embedded frame; 11-support rod; 12-fixed rod;

[0031] 2- Strain gauge;

[0032] 3- Strain collection device;

[0033] 4-Wires. DETAILED DESCRIPTION

[0034] The present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It is to be understood that the specific embodiments described herein are only used to explain the present invention, rather than to limit the present invention. It should also be noted that, for ease of description, only parts related to the present invention, rather than all structures, are shown in the accompanying drawings.

[0035] In the description of the present invention, unless otherwise clearly specified and limited, the terms "connected", "connected", and "fixed" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0036] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0037] In the description of this embodiment, the terms "upper", "lower", "right", "left" and other directions or positional relationships are based on the directions or positional relationships shown in the drawings, and are only for the convenience of description and simplification of operation, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operate in a specific direction, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are only used to distinguish in the description and have no special meaning.

[0038] like Figure 1As shown, the present invention provides a structural strength detection device, which includes an embedded frame 1, a strain gauge 2 and a strain acquisition device 3. The embedded frame 1 includes a fixed rod 12 and a plurality of support rods 11. The plurality of support rods 11 are all embedded in the structure to be tested 100. The fixed rod 12 is also embedded in the structure to be tested 100 and is fixedly connected to the plurality of support rods 11 respectively; the strain gauge 2 is arranged on the support rod 11; the strain acquisition device 3 is connected to the strain gauge 2, and the strain acquisition device 3 is used to measure the strain value. In this embodiment, the strain acquisition device 3 is a static strain gauge commonly used in the art, and the strain gauge 2 is connected to the static strain gauge through a wire 4; since the strain gauge 2 is provided on the support rod 11 of the embedded frame 1, and the strain gauge 2 is connected to the external strain acquisition device 3, when the structure 100 to be tested is subjected to a load, the strain gauge 2 on the support rod 11 can transmit the deformation at the position of the support rod 11 in the structure 100 to the strain acquisition device 3, thereby accurately measuring the strain value at the location, and further obtaining the strength at the location; since the embedded frame 1 has multiple The support rods 11 are each provided with a strain gauge 2, so that strength tests can be performed at multiple different points in the structure 100 to be tested, thereby obtaining more accurate and comprehensive measurement results; since the fixed rod 12 and multiple support rods 11 are all buried in the structure 100 to be tested, and the fixed rod 12 is respectively fixedly connected to the multiple support rods 11, the fixed rod 12 can play a positioning role for the support rods 11 during pouring, preventing the support rods 11 from being displaced during pouring, thereby ensuring that the specified position of the structure 100 to be tested can be accurately measured. The structural strength detection device has a simple structure and is easy to install. It is cast and combined with the structure 100 to be tested to form an integral structure and has multiple detection points. The measurement results are accurate and the detection cost is low.

[0039] Specifically, the fixing rod 12 and the supporting rod 11 are both steel bars, and the strain gauge 2 is wrapped with epoxy resin and adhered to the supporting rod 11; multiple supporting rods 11 are welded to the fixing rod 12 respectively, thereby ensuring the stability of the supporting rod 11 in the structure 100 to be measured; in order to enhance the connection strength between the fixing rod 12 and the supporting rod 11, during welding, the end of the supporting rod 11 is first bent into a hook shape, and then the fixing rod 12 is passed through the hooks at the ends of multiple supporting rods 11 in turn, and then the fixing rod 12 and the supporting rod 11 are welded.

[0040] Furthermore, if Figure 1 As shown, a plurality of support rods 11 are arranged along the length direction of the structure 100 to be tested, and the distance between two adjacent support rods 11 is equal, so that the strain value distribution inside the structure 100 to be tested can be accurately obtained.

[0041] Specifically, the fixing rod 12 is fixedly connected to a steel box for accommodating the structure to be tested 100, and the steel box is used to accommodate concrete. After the concrete is solidified and formed, the structure to be tested 100 can be formed in the steel box; since the entire embedded frame 1 is fixedly connected to the steel box by the fixing rod 12, the workers do not need to hold it for a long time when pouring concrete, so that the embedded frame 1 and the concrete can be kept relatively still, thereby smoothly embedding the embedded frame 1 in the structure to be tested 100.

[0042] This embodiment also provides a method for testing the strength of a concrete structure, using the above-mentioned structural strength testing device, comprising the following steps:

[0043] S1, glue the strain gauge 2 to the support rod 11;

[0044] S2, fixing the plurality of support rods 11 to the fixing rods 12 respectively;

[0045] S3, lead the wires 4 of the multiple strain gauges 2 out of the steel box used for casting the structure to be measured 100, and connect the multiple wires 4 to the strain collection device 3 respectively;

[0046] S4, pouring concrete into the steel box;

[0047] S5. After the concrete solidifies to form the structure to be tested 100, a load is applied to the structure to be tested 100, and the strain value is obtained through the strain acquisition device 3; specifically, the staff applies a set load to the structure to be tested 100 by placing a heavy object on the structure to be tested 100 or using a mechanical tool to apply a force to the structure to be tested 100.

[0048] By using the concrete structure strength detection method, the structural strength detection device can be completely buried in the structure to be tested 100, and the impact on the casting effect of the structure to be tested 100 is greatly reduced. In addition, since a plurality of support rods 11 are connected to the fixed rod 12, and strain gauges 2 are provided on the plurality of support rods 11, the concrete structure strength detection method can simultaneously perform multi-point detection on different positions of the structure to be tested 100, thereby reducing the detection cost and improving the detection accuracy.

[0049] Furthermore, before step S4, it also includes: fixing the fixing rod 12 to the steel box. Specifically, the strain gauge 2 is wrapped with epoxy resin and adhered to the support rod 11, the support rod 11 and the fixing rod 12 are welded, and then the assembled embedded frame 1 is placed in the steel box, and the two ends of the fixing rod 12 along the length direction are welded to the steel box, and then the wire 4 of the strain gauge 2 is led out of the steel box and connected to the strain acquisition device 3.

[0050] Specifically, step S2 specifically includes: welding a plurality of support rods 11 to the fixing rods 12 at equal intervals, so that the structural strength detection device can evenly measure the strain value distribution inside the structure 100 to be detected, thereby obtaining accurate strength distribution of the structure 100 to be detected.

[0051] In this embodiment, the formed structure to be tested 100 is directly applied to structures such as bridge piers or box girders as a finished product. If the test result does not meet the construction requirements, the structure of the structure to be tested 100 is reinforced at the corresponding position until the test result meets the standard; the embedded frame 1 and the strain gauge 2 of the structural strength testing device are retained in the structure to be tested 100, so that the staff can conduct continuous structural strength monitoring of the structure to be tested 100 during the later use.

[0052] Furthermore, step S4 also includes: vibrating the concrete in the steel box; when pouring concrete into the steel box, using a concrete vibrator to vibrate the concrete in the steel box to improve the density, uniformity and strength of the concrete structure, and avoid cracking, deformation and other problems after the concrete is solidified.

[0053] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. For those skilled in the art, various obvious changes, readjustments and substitutions can be made without departing from the protection scope of the present invention. It is not necessary and impossible to list all the embodiments here. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the claims of the present invention.

Claims

1. A structural strength detection device, characterized in that: include: The embedded frame (1) comprises a fixing rod (12) and a plurality of supporting rods (11), wherein the plurality of supporting rods (11) are all embedded in the structure to be tested (100), and the fixing rod (12) is also embedded in the structure to be tested (100) and is respectively fixedly connected to the plurality of supporting rods (11); A strain gauge (2), wherein the strain gauge (2) is arranged on the support rod (11); A strain collection device (3), wherein the strain collection device (3) is connected to the strain gauge (2), and the strain collection device (3) is used to measure the value of the strain.

2. The structural strength detection device according to claim 1, characterized in that: The plurality of support rods (11) are arranged along the length direction of the structure to be measured (100), and the distance between two adjacent support rods (11) is equal.

3. The structural strength detection device according to claim 2, characterized in that: The fixing rod (12) is fixedly connected to a steel box used for accommodating the structure to be tested (100).

4. A method for testing the strength of a concrete structure, using the structural strength testing device as described in any one of claims 1 to 3, comprising the following steps: S1, bonding the strain gauge (2) to the support rod (11); S2, respectively fixing and connecting the plurality of support rods (11) to the fixing rods (12); S3, respectively leading the wires (4) of the plurality of strain gauges (2) out of the steel box used for casting the structure to be measured (100), and respectively connecting the plurality of wires (4) to the strain collection device (3); S4, pouring concrete into the steel box; S5. After the concrete solidifies to form the structure to be tested (100), a load is applied to the structure to be tested (100), and the strain value is obtained through the strain collection device (3).

5. The method for detecting the strength of concrete structures according to claim 4, characterized in that: Before step S4, the method further includes: The fixing rod (12) is fixedly connected to the steel box.

6. The method for detecting the strength of concrete structures according to claim 4, characterized in that: Step S2 specifically includes: A plurality of the support rods (11) are welded to the fixing rod (12) at equal intervals.

7. The method for testing the strength of concrete structures according to claim 4, characterized in that: Step S4 also includes: The concrete in the steel box is vibrated.

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