Flexible base pavement shear strength detection device

Abstract

The utility model provides a device for detecting the shear strength of a flexible base pavement, belongs to the technical field of detection devices, mainly aims at solving the problems that the existing detection device is poor in fixing effect on a to-be-detected piece by a test piece and a fracture surface is inconvenient to observe, and adopts the following technical scheme that the device comprises a base, a mounting table and a protective cover, a hydraulic ejector rod is arranged at the top of the mounting table; a pushing plate is arranged at one end of the hydraulic ejector rod; a first pavement layer is arranged in the protective cover; a second pavement layer is arranged at the top of the first pavement layer; a second fixing plate is arranged at one end of the first road surface layer, magnifying lenses are arranged on the two sides of the protective cover, the fixing effect on the to-be-detected piece is improved through cooperation of the first fixing plate and the pushing plate, the magnifying lenses can be moved through arrangement of the magnifying lenses and the sliding grooves, and the fracture surface of the to-be-detected piece can be observed conveniently.

Description

Technical Field

[0001] This utility model relates to the field of testing device technology, and more specifically, to a testing device for the shear strength of flexible base pavement. Background Technology

[0002] With the rapid development of transportation infrastructure construction, flexible base asphalt pavement has become the main structural form of high-grade highways due to its good driving comfort, convenient construction and environmental adaptability. However, under heavy traffic, complex climate and repeated loading, the shear failure phenomenon between pavement structure layers is becoming increasingly prominent. Traditional testing devices are not good at fixing the test specimens. Under shear loads, local stress concentration is prone to occur, leading to premature cracking or slippage in non-test areas. Moreover, when the interface between the two layers of the test specimen breaks, the test specimen needs to be removed for observation. When the test specimen is removed, it is often easy to break into pieces, which affects subsequent observation. Utility Model Content

[0003] In view of the aforementioned problems, and in conjunction with the first aspect of this utility model, an embodiment of this utility model provides a device for testing the shear strength of flexible base pavement, achieved by the following specific technical means:

[0004] A flexible base pavement shear strength testing device includes a base, a mounting platform and a protective cover. The mounting platform is provided on the top of the base, the protective cover is provided on the top of the base, a hydraulic jack is provided on the top of the mounting platform, and a jacking plate is provided at one end of the hydraulic jack.

[0005] The protective cover is provided with a fixed base, the top of the fixed base is provided with a first road surface layer, the top of the first road surface layer is provided with a second road surface layer, the first road surface layer is provided with a first fixing plate on both sides, the first road surface layer is provided with a second fixing plate at one end, the protective cover is provided with a sliding groove on both sides, and a magnifying glass is provided at the top of both sets of sliding grooves.

[0006] According to a preferred embodiment, four sets of support legs are respectively provided at the four corners of the bottom of the mounting platform, and the bottom of each of the four sets of support legs is fixedly connected to the base. A mounting seat is provided on the top of the mounting platform, and the hydraulic push rod is clamped in the mounting seat. A fixing shell is fixed to the top of the mounting seat by bolts.

[0007] According to a preferred embodiment, one end of the protective cover is provided with a connecting hole, one end of the hydraulic push rod passes through the connecting hole, one end of the hydraulic push rod is detachably connected to a push plate, and clamping plates are provided on both sides of the push plate.

[0008] According to a preferred embodiment, one end of the push plate is attached to the second road surface layer, and one side of each of the two sets of clamping plates is attached to the second road surface layer.

[0009] According to a preferred embodiment, the protective cover has first screw holes on both sides, and a first screw rod is inserted into each of the two sets of first screw holes. A first fixing plate is detachably connected to one side of each of the two sets of first screw rods. One side of each of the two sets of first fixing plates is in contact with the first road surface layer. A second screw hole is provided at one end of the protective cover, and a second screw rod is inserted into the second screw hole. A second fixing plate is detachably connected to one end of the second screw rod, and one end of the second fixing plate is in contact with the first road surface layer.

[0010] According to a preferred embodiment, two sets of slide rails are provided on both sides of the protective cover, a slider is engaged on one side of each of the four sets of slide rails, a connector is provided on one side of each of the four sets of sliders, the four sets of connectors are respectively connected to the two sets of slide grooves by bolts, a limiting block is engaged in each of the two sets of slide grooves, and the magnifying glass is fixedly connected to the top of each of the two sets of limiting blocks.

[0011] According to a preferred embodiment, glass mounting frames are provided on both sides of the protective cover, and glass baffles are provided in both sets of glass mounting frames.

[0012] According to a preferred embodiment, a protective cover is fitted onto the top of the protective cover, and a hot air blower is detachably connected to one end of the protective cover.

[0013] Based on the above aspects, this utility model has the following beneficial effects:

[0014] First, after placing the first and second road surfaces on the fixed base, the user can use two sets of first and second fixing plates to press the first road surface layer with two sets of first and second screws, thus fixing the first road surface layer on both sides and one end. This improves the fixing effect on the test piece and prevents the first road surface layer from slipping during testing, which would affect the test results. The clamps on both sides of the push plate also clamp the second road surface layer on both sides, preventing the force point from slipping during the hydraulic push, thus improving the reliability and success rate of the device's testing process. Second, two sets of slide rails are provided on both sides of the protective cover. The slider can drive the slide groove to move along the slide rail direction. At the same time, the magnifying glass can move horizontally within the slide groove following the limit block. The magnifying glass can be freely adjusted in position on a plane parallel to the side of the protective cover, making it convenient for the user to observe the fracture surface between the first and second road surfaces. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of a flexible base pavement shear strength testing device provided in an embodiment of this utility model;

[0016] Figure 2 This is an exploded view of a flexible base pavement shear strength testing device provided in an embodiment of this utility model;

[0017] Figure 3 yes Figure 2 Enlarged view of region a in the middle;

[0018] Figure 4 This is a schematic diagram of the structure of the fixing seat in a flexible base pavement shear strength testing device provided in an embodiment of this utility model.

[0019] In the diagram, the correspondence between component names and drawing numbers is as follows:

[0020] 100. Base; 101. Mounting platform; 102. Protective cover; 103. Hydraulic jack; 104. Push plate; 105. Fixed seat; 106. First road surface layer; 107. Second road surface layer; 108. First fixed plate; 109. Second fixed plate; 110. Slide groove; 111. Magnifying glass; 112. Support leg; 113. Mounting seat; 114. Fixed shell; 115. Connecting hole; 116. Hot air blower; 117. Clamping plate; 118. First screw; 119. Second screw; 120. Slide rail; 121. Slider; 122. Glass mounting frame; 123. Glass baffle; 124. Protective cover. Detailed Implementation

[0021] The present invention will now be described in detail with reference to the accompanying drawings. Figure 1 This is a schematic diagram of the structure of a flexible base pavement shear strength testing device provided in an embodiment of this utility model. Figure 2 This is an exploded view of a flexible base pavement shear strength testing device provided in an embodiment of this utility model. Figure 3 yes Figure 2 Enlarged view of region a in the middle. Figure 4 This is a schematic diagram of the structure of the fixing seat in a flexible base pavement shear strength testing device provided in this embodiment of the present invention. The following is a detailed description of this flexible base pavement shear strength testing device.

[0022] A flexible base pavement shear strength testing device includes a base 100, a mounting platform 101, and a protective cover 102. The mounting platform 101 is provided on the top of the base 100, and the protective cover 102 is provided on the top of the base 100. The protective cover 102 can block the flying debris when the first pavement layer 106 and the second pavement layer 107 break during the shearing process, thereby protecting the testing personnel and improving the safety of the device. A hydraulic jack 103 is provided on the top of the mounting platform 101, and a jacking plate 104 is provided at one end of the hydraulic jack 103.

[0023] The protective cover 102 is provided with a fixing seat 105. The top of the fixing seat 105 is provided with a first road surface layer 106. The top of the first road surface layer 106 is provided with a second road surface layer 107. The first road surface layer 106 is provided with a first fixing plate 108 on both sides. The first road surface layer 106 is provided with a second fixing plate 109 at one end. The protective cover 102 is provided with a sliding groove 110 on both sides. The top of the two sets of sliding grooves 110 is provided with a magnifying glass 111.

[0024] Four sets of support legs 112 are respectively set at the four corners of the bottom of the mounting platform 101. The bottom of the four sets of support legs 112 are fixedly connected to the base 100. The top of the mounting platform 101 is provided with a mounting seat 113. A hydraulic push rod 103 is installed in the mounting seat 113. A fixing shell 114 is fixed to the top of the mounting seat 113 by bolts. The hydraulic push rod 103 is installed in the mounting seat 113, which makes the push of the hydraulic push rod 103 more stable during the test, prevents the force point from slipping during the push and thus affects the test results, and improves the reliability of the device.

[0025] One end of the protective cover 102 has a connection hole 115. One end of the hydraulic jack 103 passes through the connection hole 115. One end of the hydraulic jack 103 is detachably connected to a push plate 104. Both sides of the push plate 104 are provided with clamping plates 117. The clamping plates 117 on both sides of the push plate 104 can prevent the second road surface layer 107 from shifting during the testing process. The clamping plates 117 on both sides clamp the second road surface layer 107, which improves the accuracy of the device's testing.

[0026] One end of the jacking plate 104 is attached to the second road surface layer 107, and one side of each of the two sets of clamping plates 117 is attached to the second road surface layer 107.

[0027] Both sides of the protective cover 102 are provided with first screw holes, and first screws 118 are inserted into both sets of first screw holes. A first fixing plate 108 is detachably connected to one side of each set of first screws 118. One side of each set of first fixing plates 108 contacts the first road surface layer 106. A second screw hole is provided at one end of the protective cover 102, and a second screw 119 is inserted into the second screw hole. A second fixing plate 109 is detachably connected to one end of the second screw 119. One end of the second fixing plate 109 contacts the first road surface layer 106. When the user needs to fix it... When the first road surface layer 106 is in place, rotating the two sets of first screws 118 clockwise will cause the two sets of first fixing plates 108 to be tightly attached to the first road surface layer 106. After tightening, the first road surface layer 106 will be clamped. Then, rotating the second screw 119 clockwise will cause the second fixing plate 109 to be tightly attached to the first road surface layer 106. The two sets of first fixing plates 108 and second fixing plates 109 hold the first road surface layer 106 in place, which can prevent the first road surface layer 106 from shifting during the testing process and improve the fixing effect of the device.

[0028] The protective cover 102 has two sets of slide rails 120 on both sides. A slider 121 is attached to one side of each of the four sets of slide rails 120. A connector is attached to one side of each of the four sets of sliders 121. The four connectors are connected to the two sets of slide grooves 110 by bolts. A limiting block is attached to the inside of each of the two sets of slide grooves 110. A magnifying glass 111 is fixedly connected to the top of each of the two sets of limiting blocks. The magnifying glass 111 can move horizontally along the slide groove 110 and the slide groove 110 can move vertically along the slide rails 120. This allows the magnifying glass 111 to move freely on a plane parallel to the glass baffle 123, making it convenient to observe the fracture surface between the first road surface layer 106 and the second road surface layer 107 inside the protective cover 102, thus improving the practicality of the device.

[0029] The protective cover 102 is provided with glass mounting frames 122 on both sides, and glass baffles 123 are provided in both sets of glass mounting frames 122.

[0030] The protective cover 124 is attached to the top of the protective cover 102. A hot air blower 116 is detachably connected to one end of the protective cover 102. The hot air blower 116 heats the inside of the protective cover 102, which can simulate the detection environment under hot weather and provide multiple sets of detection data at different temperatures, thus improving the practicality of the device.

[0031] The embodiments of this utility model are given for illustrative and descriptive purposes only, and are not intended to be exhaustive or to limit the utility model to the forms disclosed. Many modifications and variations will be apparent to those skilled in the art. The embodiments were chosen and described in order to better illustrate the principles and practical applications of this utility model, and to enable those skilled in the art to understand this utility model and design various embodiments with various modifications suitable for a particular purpose.

Claims

1. A device for testing the shear strength of flexible base pavement, comprising a base (100), a mounting platform (101), and a protective cover (102), characterized in that: The mounting platform (101) is provided on the top of the base (100), the protective cover (102) is provided on the top of the base (100), the hydraulic push rod (103) is provided on the top of the mounting platform (101), and a push plate (104) is provided at one end of the hydraulic push rod (103). The protective cover (102) is provided with a fixing seat (105), the top of the fixing seat (105) is provided with a first road surface layer (106), the top of the first road surface layer (106) is provided with a second road surface layer (107), the first road surface layer (106) is provided with a first fixing plate (108) on both sides, the first road surface layer (106) is provided with a second fixing plate (109) at one end, the protective cover (102) is provided with a sliding groove (110) on both sides, and a magnifying glass (111) is provided on the top of the two sets of sliding grooves (110).

2. The flexible base pavement shear strength testing device as described in claim 1, characterized in that: The mounting platform (101) has four sets of support legs (112) at the four corners of its bottom. The bottom of each of the four sets of support legs (112) is fixedly connected to the base (100). The mounting platform (101) has a mounting seat (113) on its top. The mounting seat (113) is fitted with the hydraulic push rod (103). The mounting seat (113) has a fixing shell (114) fixed to its top by bolts.

3. The flexible base pavement shear strength testing device as described in claim 1, characterized in that: The protective cover (102) has a connection hole (115) at one end, and the hydraulic push rod (103) passes through the connection hole (115) at one end. The hydraulic push rod (103) is detachably connected to a push plate (104) at one end, and the push plate (104) is provided with clamps (117) on both sides.

4. The flexible base pavement shear strength testing device as described in claim 3, characterized in that: One end of the push plate (104) is attached to the second road surface layer (107), and one side of each of the two sets of clamps (117) is attached to the second road surface layer (107).

5. The flexible base pavement shear strength testing device as described in claim 1, characterized in that: The protective cover (102) has first screw holes on both sides, and first screws (118) are inserted into both sets of first screw holes. The first fixing plate (108) can be detachably connected to one side of both sets of first screws (118). The first fixing plate (108) is in contact with the first road surface layer (106) on one side. The protective cover (102) has a second screw hole at one end, and a second screw (119) is inserted into the second screw hole. The second fixing plate (109) can be detachably connected to one end of the second screw (119). The second fixing plate (109) is in contact with the first road surface layer (106) at one end.

6. The flexible base pavement shear strength testing device as described in claim 1, characterized in that: The protective cover (102) is provided with two sets of slide rails (120) on both sides. A slider (121) is attached to one side of each of the four sets of slide rails (120). A connector is attached to one side of each of the four sets of sliders (121). The four sets of connectors are respectively connected to the two sets of slide grooves (110) by bolts. A limiting block is attached to each of the two sets of slide grooves (110). The magnifying glass (111) is fixedly connected to the top of each of the two sets of limiting blocks.

7. The flexible base pavement shear strength testing device as described in claim 1, characterized in that: The protective cover (102) is provided with glass mounting frames (122) on both sides, and glass baffles (123) are provided in both sets of glass mounting frames (122).

8. The flexible base pavement shear strength testing device as described in claim 1, characterized in that: The protective cover (102) is fitted with a protective cover cover (124) on the top, and a hot air blower (116) is detachably connected to one end of the protective cover (102).

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