Nondestructive testing model for rebound modulus of roadbed and pavement

Abstract

The utility model discloses a nondestructive testing model for the rebound modulus of a roadbed and a pavement, and relates to the field of engineering nondestructive testing. A nondestructive testing model for the rebound modulus of a roadbed and a pavement comprises a frame which is in a flat plate shape and is used for bearing a rebound modulus detection groove; the number of the rebound modulus detection grooves is multiple, and the multiple rebound modulus detection grooves are distributed in the frame and used for containing a filling material; and the filling material is filled in the rebound modulus detection groove and is used for simulating the rebound moduli of different road roadbeds. According to the utility model, the filling materials of different road frame materials are filled into the rebound modulus detection groove, then the ball falling equipment carrying the sensor freely falls at a certain height above a material area, and the instrument can collect a deformation modulus at the moment that the ball falling equipment is in contact with the material, so that the rebound modulus is detected. The rebound modulus of the filling material can be obtained through equipment conversion, and the nondestructive testing method for the rebound modulus of the roadbed and the pavement is convenient to popularize.

Description

Technical Field

[0001] The utility model relates to the field of non-destructive testing of engineering, in particular to a non-destructive testing model for the resilient modulus of subgrade and pavement. Background Technique

[0002] Non-destructive testing refers to the method of using the changes in heat, sound, light, electricity, magnetism, etc. caused by the abnormalities or defects in the internal structure of mechanical materials, without damaging or affecting the service performance of the tested object and without harming the internal tissues of the tested object, by means of physical or chemical methods, with the help of modern technologies and equipment. It is a method for inspecting and testing the structure, state, type, quantity, shape, nature, position, size, distribution and their changes of the internal and surface of the test piece.

[0003] The resilient modulus refers to the ratio of the stress generated by the subgrade, pavement and road construction materials under the action of load to their corresponding resilient strains. The resilient modulus of subgrade represents the ability of the subgrade to resist vertical deformation under the action of vertical load during the elastic deformation stage. If the vertical load is a fixed value, the greater the resilient modulus value of the subgrade, the smaller the vertical displacement generated; if the vertical displacement is a fixed value, the greater the resilient modulus value, the greater the ability of the subgrade to bear the action of external loads. Therefore, the resilient modulus is used as an index of the compressive strength of subgrade in pavement design. The importance of the resilient modulus index of subgrade and pavement to the stability of road structure is self-evident. However, due to the limitations of the large volume, wide floor area and high cost of the actual road of subgrade and pavement, it is difficult to be specifically applied to schools or test and detection institutions, resulting in the ineffective promotion of the non-destructive testing method for the resilient modulus of subgrade and pavement. Content of the Utility Model

[0004] The technical problem to be solved by the utility model is that the non-destructive testing method for the resilient modulus of subgrade and pavement cannot be effectively promoted due to the limitations of the large volume, wide floor area and high cost of the actual road of subgrade and pavement. The purpose is to provide a non-destructive testing model for the resilient modulus of subgrade and pavement to solve the problem that the non-destructive testing method for the resilient modulus of subgrade and pavement is difficult to be effectively promoted.

[0005] The utility model is realized by the following technical solutions:

[0006] A non-destructive testing model for the resilient modulus of subgrade and pavement, comprising

[0007] A frame, which is in the shape of a flat plate and is used to carry the resilient modulus detection grooves;

[0008] The resilient modulus detection grooves, there are multiple of them, and the multiple resilient modulus detection grooves are distributed on the frame and are used to accommodate the filling materials;

[0009] The filling materials, which are filled in the resilient modulus detection grooves and are used to simulate the resilient modulus of different road subgrade materials.

[0010] As a possible design, the above-mentioned frame includes edge segments and connecting segments.

[0011] The edge segments are located on the sides of all the resilient modulus detection grooves. The edge segments are inclined, and the height of the end of the edge segment away from the resilient modulus detection groove is lower than the height of the end of the edge segment close to the resilient modulus detection groove.

[0012] The connecting segments are located between two adjacent resilient modulus detection grooves.

[0013] As a possible design, the above-mentioned connecting segment is in the shape of a concave arc.

[0014] As a possible design, the above-mentioned frame is square, rectangular, circular or of other shapes.

[0015] As a possible design, a protective cover is detachably installed on the above-mentioned resilient modulus detection groove. The protective cover has the same shape as the resilient modulus detection groove, and the area of the protective cover is larger than the area of the resilient modulus detection groove.

[0016] As a possible design, a clamping groove is provided around the above-mentioned resilient modulus detection groove for clamping the protective cover.

[0017] As a possible design, the height of the end of the above-mentioned clamping groove away from the resilient modulus detection groove is lower than the height of the end of the clamping groove close to the resilient modulus detection groove.

[0018] As a possible design, the thickness of the above-mentioned frame is 20 - 60 cm.

[0019] As a possible design, the height of the above-mentioned resilient modulus detection groove is 40 - 55 cm.

[0020] As a possible design, the thickness of the above-mentioned filler is 30 - 55 cm.

[0021] Compared with the prior art, the utility model has the following advantages and beneficial effects:

[0022] In the utility model, the fillers of different road frame materials are filled into the resilient modulus detection grooves, and then a falling ball device carrying a sensor is used to freely fall from a certain height above the material area. When the falling ball device contacts the material, the instrument will collect a deformation modulus, and the resilient modulus of the filler can be obtained through conversion by the device. When there are too many trainees, the fillers in multiple resilient modulus detection grooves can be measured simultaneously, which is convenient for popularizing the non-destructive detection method of the resilient modulus of subgrade and pavement. Description of the Drawings

[0023] The accompanying drawings described herein are used to provide a further understanding of the embodiments of the present utility model, form a part of this application, and do not constitute a limitation to the embodiments of the present utility model. In the drawings:

[0024] Figure 1 It is one of the structural schematic diagrams of a non-destructive testing model for the resilient modulus of subgrade and pavement of the present utility model;

[0025] Figure 2 It is the second of the structural schematic diagrams of a non-destructive testing model for the resilient modulus of subgrade and pavement of the present utility model;

[0026] Figure 3 It is the sectional structural schematic diagram of a non-destructive testing model for the resilient modulus of subgrade and pavement of the present utility model.

[0027] Marks in the drawings and corresponding component names:

[0028] 1 - Frame; 11 - Edge section; 12 - Connection section; 2 - Resilient modulus detection groove; 3 - Filler; 4 - Protective cover; 5 - Snap groove. Specific embodiments

[0029] In order to make the objectives, technical solutions, and advantages of the present utility model clearer and more understandable, the present utility model will be further described in detail below in conjunction with the embodiments and the accompanying drawings. The illustrative embodiments and descriptions thereof of the present utility model are only used to explain the present utility model and do not constitute a limitation to the present utility model.

[0030] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it can be directly on the other element or indirectly on that other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or indirectly connected to that other element.

[0031] In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present utility model, "a plurality" means two or more unless otherwise clearly and specifically defined. "Several" means one or more unless otherwise clearly and specifically defined.

[0032] In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by the terms "upper", "lower", "front", "rear", "left", "right", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present utility model.

[0033] In the description of the present utility model, it should be noted that unless otherwise clearly specified and defined, the terms "installation", "connection", and "coupling" 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 directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0034] Embodiment

[0035] This embodiment provides a non-destructive detection model for the resilient modulus of subgrade and pavement, as Figure 1 shown, which includes a frame 1, a resilient modulus detection groove 2, and a filler 3. The frame 1 is in the shape of a flat plate, which is used to carry the resilient modulus detection groove 2, and the material can be metal, alloy, wood, or polymer material; there are multiple resilient modulus detection grooves 2, preferably 2, 4, or 8. The multiple resilient modulus detection grooves 2 are randomly or evenly distributed on the frame 1. They are concave-shaped and used to accommodate the filler 3. Each resilient modulus detection groove 2 can be filled with a different filler 3; the filler 3 is filled in the resilient modulus detection groove 2, and it can be sand, rock, concrete, or other subgrade materials. Different fillers 3 are filled in the resilient modulus detection groove 2, and its resilient modulus can be detected by a falling ball device, achieving the purpose of non-destructive measurement teaching.

[0036] In this embodiment, when the above model is used, only different types of fillers 3 need to be filled into the resilient modulus detection groove 2, and then the falling ball device is used to perform falling ball measurement on the filler 3 in the resilient modulus detection groove 2 to obtain the resilient modulus, which can achieve convenient measurement teaching and effectively promote the non-destructive measurement of the resilient modulus of subgrade and pavement.

[0037] In some embodiments of the present utility model, as Figure 2As shown in the figure, the above-mentioned frame 1 includes an edge segment 11 and a connecting segment 12. The edge segment 11 is located on the side of all the resilient modulus detection grooves 2, and it is arranged in a circle around all the resilient modulus detection grooves 2. Moreover, the edge segment 11 is inclined, and the inclination angle is 3° - 5°. It is designed such that the height gradually decreases from the end close to the resilient modulus detection groove 2 to the end far from the resilient modulus detection groove 2. Such a design can ensure that even when it rains, the rainwater will not flow into the resilient modulus detection groove 2, but will be drained along the edge segment 11, ensuring the accuracy of the measurement results. The connecting segment 12 is located between two adjacent resilient modulus detection grooves 2, and is used to ensure that there is a gap between adjacent resilient modulus detection grooves 2, so that when measuring, the ball dropping device can accurately fall into the corresponding resilient modulus detection groove 2, and ensure that even if the ball dropping device causes the filling material 3 to splash out, the splashed filling material 3 will not fall into other resilient modulus detection grooves 2.

[0038] In this embodiment, the teaching scenarios are diverse and sometimes may be carried out outdoors. If it is carried out when it is raining, the rainwater flows out along the edge segment 11, which can prevent the rainwater from gathering in the resilient modulus detection groove 2 and further affecting the accuracy of the detection results of the ball dropping device.

[0039] In some embodiments of the present utility model, as Figure 3 shown, the above-mentioned connecting segment 12 is in a downward concave arc shape. The downward concave arc shape can ensure that when there is rainwater, the rainwater will slide down along the side wall of the connecting segment 12 and then flow out through the edge segment 11, further ensuring that the rainwater will not flow into the resilient modulus detection groove 2.

[0040] In some embodiments of the present utility model, as Figures 1 to 3 shown, the above-mentioned frame 1 is square, rectangular, circular or other shapes, and its shape can be designed according to actual needs.

[0041] In some embodiments of the present utility model, as Figure 2 shown, a protective cover 4 is detachably installed on the above-mentioned resilient modulus detection groove 2. The protective cover 4 has the same shape as the resilient modulus detection groove 2, and is square, rectangular, polygonal or circular. Moreover, the protective cover 4 is in an inward concave shape, and the area of the protective cover 4 is larger than the area of the resilient modulus detection groove 2, so as to ensure that the protective cover 4 can fully protect the resilient modulus detection groove 2 and prevent rainwater or other impurities from falling into it.

[0042] In this embodiment, when not in use, the protective cover 4 can be covered on the resilient modulus detection groove 2 to provide sufficient protection for it.

[0043] In some embodiments of the present utility model, as Figures 2 to 3As shown in the figure, a clamping groove 5 is arranged around the rebound modulus detection groove 2, and the edge of the clamping groove 5 is clamped with the edge of the protective cover 4, which can ensure that the protective cover 4 will not be blown off by the north wind or fall due to accidental circumstances.

[0044] In some embodiments of the present utility model, as Figure 3 shown in the figure, the height of one end of the clamping groove 5 far from the rebound modulus detection groove 2 is lower than the height of the end of the clamping groove 5 close to the rebound modulus detection groove 2. When placed outdoors, if it rains, rainwater will fall into the clamping groove 5. When the amount of water is too large, the rainwater can overflow from the side of the clamping groove 5, and then flow into the edge section 11 and fall, ensuring that the rainwater will not overflow into the rebound modulus detection groove 2.

[0045] In some embodiments of the present utility model, as Figures 1 to 3 shown in the figure, the thickness of the above-mentioned frame 1 is 20 - 60 cm. This thickness can ensure accurate measurement data of this mold.

[0046] In some embodiments of the present utility model, as Figures 1 to 3 shown in the figure, the height of the above-mentioned rebound modulus detection groove (2) is 40 - 55 cm. This thickness can fill in the filler 3 that is the same as the actual situation of the roadbed and pavement, so as to make the measurement accurate and the teaching effect good.

[0047] In some embodiments of the present utility model, as Figures 1 to 3 shown in the figure, the thickness of the above-mentioned filler (3) is 30 - 55 cm. In this thickness range, the real measurement situation of the roadbed and pavement can be simulated, which is convenient for actual measurement teaching.

[0048] The above specific implementation manners further elaborate on the purpose, technical solutions, and beneficial effects of the present utility model. It should be understood that the above are only the specific implementation manners of the present utility model and are not used to limit the protection scope of the present utility model. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present utility model shall be included in the protection scope of the present utility model.

Claims

1. A nondestructive testing model for the resilience modulus of roadbed and pavement, characterized in that: include The frame is in the shape of a flat plate and is used to carry the rebound modulus detection groove; There are multiple resilience modulus detection grooves, which are distributed on the frame and are used to accommodate fillers; The filling material is filled in the resilience modulus detection groove and is used to simulate the resilience modulus of different roadbed materials.

2. The nondestructive testing model for the resilience modulus of roadbed and pavement according to claim 1 is characterized in that: The frame includes an edge segment and a connecting segment, The edge segment is located at the side of all the rebound modulus detection grooves, the edge segment is inclined, and the height of the edge segment away from the rebound modulus detection groove is lower than the height of the edge segment close to the rebound modulus detection groove; The connecting section is located between two adjacent resilience modulus detection grooves.

3. The nondestructive testing model for the resilience modulus of roadbed and pavement according to claim 2 is characterized in that: The connecting section is in a concave arc shape.

4. The nondestructive testing model for the rebound modulus of roadbed and pavement according to claim 1 is characterized in that: The frame is in square, rectangular, circular or other shapes.

5. The nondestructive testing model for the resilience modulus of roadbed and pavement according to claim 1 is characterized in that: A protective cover is detachably mounted on the resilience modulus detection groove, the protective cover has the same shape as the resilience modulus detection groove, and the area of ​​the protective cover is larger than the area of ​​the resilience modulus detection groove.

6. A nondestructive testing model for the resilience modulus of roadbed and pavement according to claim 5, characterized in that: A clamping groove is arranged around the rebound modulus detection groove, and the clamping groove is used to clamp the protective cover.

7. A nondestructive testing model for the resilience modulus of roadbed and pavement according to claim 6, characterized in that: The height of the clamping groove at one end away from the rebound modulus detection groove is lower than the height of the clamping groove at one end close to the rebound modulus detection groove.

8. The nondestructive testing model for the rebound modulus of roadbed and pavement according to claim 1 is characterized in that: The frame thickness is 20 to 60 cm.

9. The nondestructive testing model for the resilience modulus of roadbed and pavement according to claim 1, characterized in that: The height of the resilience modulus detection groove is 40 to 55 cm.

10. The nondestructive testing model for the rebound modulus of roadbed and pavement according to claim 1, characterized in that: The thickness of the filling material is 30 to 55 cm.

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