Highway subgrade compaction degree detection device
By setting multiple detachable limiting rings in the sampling holes of the highway subgrade compaction testing device, the problem of equipment diversification caused by the fixed diameter of the sampling holes in the existing technology is solved, realizing flexible compaction testing and reducing construction costs and transportation burden.
Patent Information
- Application Number
- CN202423174280.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-23
- Publication Date
- 2025-12-09
- Estimated Expiration
- 2034-12-23
AI Technical Summary
The sampling hole diameter of existing highway subgrade compaction testing devices is fixed, which means that multiple devices need to be purchased when construction is carried out in different regions, increasing construction costs and transportation burden, and resulting in low flexibility.
A substrate was designed with multiple limiting rings of progressively decreasing diameter inside the sampling hole. The limiting rings are detachably connected, and the requirements of different test pits can be met by selecting limiting rings of different diameters.
It meets the compaction testing needs in different regions, reduces construction costs, simplifies operation, expands the scope of application, reduces the number of equipment, and improves flexibility and practicality.
Smart Images
Figure CN223647034U_ABST
Abstract
Description
Technical fields:
[0001] This utility model relates to the field of testing devices, and in particular to a device for testing the compaction degree of highway subgrade. Background technology:
[0002] During highway subgrade construction, compaction degree testing is necessary to ensure construction quality. There are various existing methods for testing subgrade compaction degree, one of which is the sand filling method. This method requires sampling holes on a substrate to collect soil samples at designated subgrade locations. However, the diameter of these sampling holes on existing substrates is usually fixed. In actual construction, due to factors such as base layer thickness, the diameter of the test pit often varies depending on the region. Therefore, substrates with single-diameter sampling holes have limitations in application flexibility. To meet usage requirements, multiple related devices are typically purchased, increasing construction costs and the burden of storage and transport. Summary of the Invention:
[0003] The technical problem to be solved by this utility model is to provide a highway subgrade compaction testing device that can meet the excavation needs of multiple test pits with different diameters, expand its application range, and reduce construction costs.
[0004] The purpose of this utility model is achieved as follows:
[0005] It includes a substrate, which consists of a base plate and side plates extending upward around the base plate. A sampling hole is provided through the center of the base plate. Multiple limiting rings with progressively decreasing diameters are coaxially arranged in the sampling hole, and the inner diameter of the limiting rings matches the diameter standard of the test pit specified in the prior art. The multiple limiting rings are detachably connected to each other, as is the outermost limiting ring and the sampling hole.
[0006] The limiting ring connected to the sampling hole is the first limiting ring, the limiting ring in the middle is the second limiting ring, and the limiting ring on the innermost side is the third limiting ring. The first limiting ring is composed of a first inner ring body and a first outer ring body, and the second limiting ring is composed of a second inner ring body and a second outer ring body. The lower end of the inner ring of the outer ring body of the first limiting ring and the second limiting ring is connected to the upper end of the outer ring of the inner ring body. The thickness and width of the inner ring body and the outer ring body are the same.
[0007] The third limiting ring is annular, and the thickness of the third limiting ring is adapted to the thickness of the outer ring of the second limiting ring;
[0008] All the inner rings of each limiting ring are connected to a downwardly extending limiting sleeve at their lower ends.
[0009] An annular limiting ring receiving groove is provided on the bottom plate of the substrate outside the sampling hole. The width of the limiting ring receiving groove is adapted to the width of the first outer ring body of the first limiting ring, and the depth of the limiting ring receiving groove is adapted to the thickness of the first outer ring body of the first limiting ring. The first outer ring body of the first limiting ring is placed in the limiting receiving groove, the second outer ring body of the second limiting ring is placed on the first inner ring body of the first limiting ring, and the width of the third limiting ring is greater than the width of the inner ring body of the second limiting ring. The third limiting ring is placed on the second inner ring body of the second limiting ring.
[0010] After all the limiting rings are connected, their upper surfaces are on the same plane and also on the same plane as the upper surface of the base plate of the substrate; the lower end of each limiting sleeve is on the same plane as the lower surface of the substrate. Select the corresponding limiting ring according to the diameter of the test pit.
[0011] Two positioning plates are symmetrically provided on the bottom plates on both sides of the sampling hole. The inner end of the positioning plate presses against the top of the installed limit ring to achieve positioning of the limit ring.
[0012] Both positioning plates have mounting holes at their outer ends, and positioning rods are movably inserted into these mounting holes. The base plate of the substrate has multiple positioning holes arranged inwards and outwards at the corresponding positions of the positioning plates for the positioning rods to pass through. That is, each positioning hole is set on the moving trajectory of the positioning plate moving inwards and outwards, and the number of positioning holes matches the number of limiting rings. When the positioning rod on the positioning plate passes through the innermost positioning hole, the inner end of the positioning plate can press against the third limiting ring. When the positioning rod on the positioning plate passes through the outermost positioning hole, the inner end of the positioning plate presses against the first limiting ring. In other words, by inserting the positioning rods passing through the positioning plates into different positioning holes, the positioning plates can move while ensuring the positioning of different limiting rings.
[0013] The positioning rod has a cylindrical bottom, a prismatic top, and a cylindrical top. The prismatic shape can be a cuboid or a triangular prism. The shape of each positioning hole matches the shape and dimensions of the positioning rod; that is, the lower part of the positioning hole is cylindrical, the middle part is prismatic, and the upper part is cylindrical. When the positioning rod is inserted into the positioning hole, the lower cylindrical part of the positioning rod is placed inside the lower cylindrical part of the positioning hole, the middle prismatic part of the positioning rod is located at the middle prismatic part of the positioning hole, and the upper cylindrical part of the positioning rod is located at the upper cylindrical part of the positioning hole.
[0014] The lower surface of the sand filling cylinder has an upwardly extending positioning groove that matches the two positioning plates. When the sand filling cylinder is placed on the bottom plate of the base plate, the two positioning plates protrude from the two positioning grooves. The positioning of the sand filling cylinder is achieved by the cooperation between the positioning plates and the positioning grooves.
[0015] The opening diameter at the bottom of the sand filling cylinder is smaller than the inner diameter of the third limiting ring to ensure that the sand falls smoothly into the test pit. At the same time, the outer diameter of the sand filling cylinder is larger than the outer diameter of the first limiting ring to ensure stable contact between the sand filling cylinder and the substrate.
[0016] To minimize the impact on the placement of the sand-filling cylinder, the mounting holes on the positioning plate are countersunk holes, and the top of the positioning rod does not exceed the upper surface of the positioning plate when in operation.
[0017] The outer surfaces of the left and right side plates of the substrate are provided with outward-facing receiving grooves. Each receiving groove contains a pedal. The pedal consists of two parts connected together: a flat plate segment and a protruding segment. The protruding segment is located above the flat plate segment and consists of a vertical plate and two horizontal plates, one above the other. The outward-facing ends of the two horizontal plates are fixed to the upper and lower ends of the vertical plate, respectively. The inward-facing end of the lower horizontal plate is fixed to the upper end of the flat plate segment. Sleeves are fixed at both the front and rear ends of the lower end of the flat plate segment of the pedal. The side plates of the substrate have holes at the positions corresponding to the two sleeves. The two sleeves extend into the two holes of the side plates, respectively, to realize the rotational connection between the sleeves and the side plates.
[0018] The lower part of the flat section of the pedal has a sliding groove on the outward-facing surface. A limiting rod is slidably installed in the sliding groove and slides in contact with the sliding groove. An adjusting block protruding from the sliding groove is fixed to one end of the limiting rod away from the side plate. The other end of the limiting rod extends into the sleeve. A limiting hole extending into the side plate is connected to the hole in the side plate. By moving the adjusting block from the outside, the limiting rod can be extended into the limiting hole in the side plate through the hole in the side plate.
[0019] The limiting rod has a prism-shaped structure, and the limiting hole matches the shape of the limiting rod.
[0020] The lower surface of the lower cross plate of the protruding section of the pedal is provided with a groove.
[0021] The advantages of this utility model are: by coaxially setting multiple limiting rings with successively decreasing diameters in the sampling hole, the inner diameter of different limiting rings can meet the opening requirements of test pits with different diameters; since the multiple limiting rings and the connection between the limiting rings and the sampling hole are detachable, during use, it is only necessary to remove or install the corresponding limiting ring according to the requirements, which is simple to operate and has a simple structure. It does not require the purchase of multiple additional devices to meet different usage needs, which reduces construction costs and does not cause a large burden on storage and transportation due to the large number of devices, making it highly practical. Attached image description:
[0022] Figure 1 This is a schematic diagram of the structure of this utility model;
[0023] Figure 2 This is a partial longitudinal sectional view of the substrate in this utility model;
[0024] Figure 3 yes Figure 2 Enlarged structural diagram at point A;
[0025] Figure 4 This is a schematic diagram of the limiting ring structure in this utility model;
[0026] Figure 5 This is a schematic diagram showing the connection status of multiple limiting rings in this utility model;
[0027] Figure 6 This is a schematic diagram of the positioning rod in this utility model;
[0028] Figure 7 This is a schematic diagram showing the connection state of the pedal and the side plate in this utility model;
[0029] Figure 8 This is a side view of the pedal structure in this utility model. Detailed implementation method:
[0030] The following is combined Figure 1-8 The present invention will be further described below;
[0031] It includes a substrate 1, which consists of a base plate 1-1 and side plates 1-2 extending upward from the perimeter of the base plate. A sampling hole 2 is provided through the center of the base plate. Multiple limiting rings 3 with progressively decreasing diameters are coaxially arranged in the sampling hole. The number of limiting rings is usually two to three, and the inner diameter of the limiting rings matches the standard diameter of the test pit specified in the prior art. The multiple limiting rings are detachably connected to each other, as is the outermost limiting ring to the sampling hole, so that test pits of different diameters can be dug by removing different limiting rings.
[0032] The limiting ring connected to the sampling hole is the first limiting ring 3-1, the middle limiting ring is the second limiting ring 3-2, and the innermost limiting ring is the third limiting ring 3-3. The first limiting ring 3-1 is composed of a first inner ring body 3-1-1 and a first outer ring body 3-1-2. The second limiting ring is composed of a second inner ring body 3-2-1 and a second outer ring body 3-2-2. The lower end of the inner ring of the outer ring of the first limiting ring and the second limiting ring is connected to the upper end of the outer ring of the inner ring body. The thickness and width of the inner ring body and the outer ring body are the same.
[0033] The third limiting ring is annular, and the thickness of the third limiting ring is adapted to the thickness of the outer ring of the second limiting ring;
[0034] All the inner rings of each limiting ring are connected to a downwardly extending limiting sleeve 4 at their lower ends.
[0035] An annular limiting ring receiving groove is provided on the bottom plate of the substrate outside the sampling hole. The width of the limiting ring receiving groove is adapted to the width of the first outer ring body of the first limiting ring, and the depth of the limiting ring receiving groove is adapted to the thickness of the first outer ring body of the first limiting ring. The first outer ring body of the first limiting ring (i.e., the limiting ring with the largest inner diameter) is placed in the limiting receiving groove, the second outer ring body of the second limiting ring is placed on the first inner ring body of the first limiting ring, and the width of the third limiting ring (i.e., the limiting ring with the smallest inner diameter) is greater than the width of the second inner ring body of the second limiting ring, and the third limiting ring is placed on the second inner ring body of the second limiting ring.
[0036] After all the limiting rings are connected, their upper surfaces are on the same plane and also on the same plane as the upper surface of the base plate of the substrate; the lower ends of each limiting sleeve are on the same plane as the lower surface of the substrate. This facilitates the excavation of the test pit and ensures the stability of the substrate when placed on the roadbed.
[0037] Select the corresponding limiting ring according to the diameter of the test pit. For example, when the diameter of the test pit corresponds to the inner diameter of the second limiting ring, the third limiting ring located on the inner side can be removed. At this time, the upper surface of the outer ring of the second limiting ring is on the same plane as the upper surface of the first limiting ring and the upper surface of the bottom plate of the substrate.
[0038] Two positioning plates 5 are symmetrically provided on the bottom plates on both sides of the sampling hole. The inner end of the positioning plate presses against the top of the installed limit ring to achieve positioning of the limit ring and ensure the stability of the limit ring during operation.
[0039] Both positioning plates have mounting holes 5-1 at their outer ends, and positioning rods 6 are movably inserted into these mounting holes. The bottom plate of the base plate has multiple positioning holes 7 arranged inwards and outwards at the corresponding positions of the positioning plates for the positioning rods to pass through. That is, each positioning hole is positioned along the movement trajectory of the positioning plate, and the number of positioning holes matches the number of limiting rings. When the positioning rod on the positioning plate passes through the innermost positioning hole, the inner end of the positioning plate presses against the third limiting ring; when the positioning rod on the positioning plate passes through the outermost positioning hole, the inner end of the positioning plate presses against the first limiting ring. In other words, by inserting the positioning rods through the positioning plates into different corresponding positioning holes, the positioning plates can move while simultaneously ensuring the positioning of different limiting rings. The positioning plates can be adjusted radially along the positioning rings to be removed from the corresponding limiting rings, allowing the corresponding limiting rings to be taken out.
[0040] The positioning rod 6 has a cylindrical structure 6-1 at the bottom, a prismatic structure 6-2 in the middle, and a cylindrical structure at the top. The prismatic structure can be a cuboid or a triangular prism. The shape of each positioning hole matches the shape and size of the positioning rod. That is, the lower part of the positioning hole is cylindrical, the middle part is prismatic, and the upper part is cylindrical. When the positioning rod is inserted into the positioning hole, the lower cylindrical part of the positioning rod is placed inside the lower cylindrical part of the positioning hole, the middle prismatic part of the positioning rod is located at the middle prismatic part of the positioning hole, and the upper cylindrical part of the positioning rod is located at the upper cylindrical part of the positioning hole. This arrangement facilitates the limiting of the positioning plate and prevents the positioning plate from rotating along the positioning rod during operation.
[0041] The lower surface of the sand filling cylinder 8 is provided with an upwardly extending positioning groove that matches the two positioning plates. When the sand filling cylinder is placed on the bottom plate of the base plate, the two positioning plates are exposed from the two positioning grooves. The positioning of the sand filling cylinder is achieved by the cooperation between the positioning plates and the positioning grooves.
[0042] The opening diameter at the bottom of the sand filling cylinder is smaller than the inner diameter of the third limiting ring to ensure that the sand falls smoothly into the test pit. At the same time, the outer diameter of the sand filling cylinder is larger than the outer diameter of the first limiting ring to ensure stable contact between the sand filling cylinder and the substrate.
[0043] To minimize the impact on the placement of the sand-filling cylinder, the mounting hole 5-1 on the positioning plate 5 is countersunk. When the positioning rod 6 is in operation, its top end is not higher than the upper surface of the positioning plate. To facilitate the insertion and removal of the positioning rod, the outer diameter of the countersunk hole can be made larger to provide sufficient operating space for the positioning rod.
[0044] The outer surfaces of the left and right side plates of the substrate are provided with outward-facing receiving grooves 1-3. Each receiving groove is provided with a pedal 9. The pedal consists of two parts connected together: a flat plate segment 9-1 and a protruding segment 9-2. The protruding segment is located above the flat plate segment and consists of a vertical plate and two horizontal plates, one above the other. The outward-facing ends of the two horizontal plates are fixed to the upper and lower ends of the vertical plate, respectively. The inward-facing end of the lower horizontal plate is fixed to the upper end of the flat plate segment. When the pedal is unfolded and in a horizontal state, the protruding segment of the pedal can contact the ground. The front and rear ends of the lower flat plate segment of the pedal are fixed with sleeves 10. The side plates of the substrate have holes at the positions corresponding to the two sleeves. The two sleeves extend into the two holes of the side plates, realizing the rotational connection between the sleeves and the side plates.
[0045] The lower part of the flat section of the pedal has a sliding groove 11 facing outward. A limiting rod 12 is slidably installed in the sliding groove. The limiting rod and the sliding groove are in sliding contact. An adjusting block 13 protruding from the sliding groove is fixed to one end of the limiting rod away from the side plate. The other end of the limiting rod extends into the sleeve. Moving the adjusting block can make the limiting rod extend from the outside end of the sleeve and enter the hole in the side plate. The hole in the side plate is connected to a limiting hole 1-4 extending into the inside of the side plate. By moving the adjusting block from the outside, the limiting rod can be extended into the limiting hole in the side plate through the hole in the side plate.
[0046] The limiting rod is a prism-shaped structure, and the shape of the limiting hole matches that of the limiting rod. The prism shape of the limiting rod can prevent the sleeve from flipping over, thus ensuring the stability of the pedal when not in operation.
[0047] The lower surface of the lower horizontal plate of the protruding section of the pedal is provided with a groove 9-3. The groove provides a point of leverage for the worker's hands when handling the substrate, thus improving the convenience of handling the substrate.
[0048] The pedal can be lowered along the hinge point to a horizontal position, allowing construction workers to use their feet to fix the substrate during work. This ensures the stability of the substrate and avoids the damage caused by workers stepping on the side plates of the substrate to ensure stability, as is done in existing technologies. The pedal provides a stable foothold for workers, improving both substrate stability and comfort during substrate positioning.
[0049] When using this device, first select and retain the corresponding limiting ring according to the diameter of the test pit. Then, unfold the two pedals, step on the pedals to fix the base plate, and begin the excavation of the test pit. After the test pit is excavated, weigh the soil removed from it. Then, place the sand-filling cylinder, which is also weighed, on the base plate and pour the sand into the test pit. Once the test pit is full, remove the sand-filling cylinder and weigh the remaining sand to calculate the weight of the sand used. Finally, use the obtained data to perform calculations according to relevant formulas. The entire operation is simple and quick, highly flexible, widely applicable, and highly practical.
[0050] This device, with its detachable connection of multiple limiting rings, can provide a reference for the excavation of test pits of different diameters, expanding the applicability of this testing device. It has a simple structure, high flexibility, easy operation, and strong practicality.
[0051] The above embodiments are only used to illustrate the technical solution of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solution of this utility model without departing from the spirit and scope of the technical solution of this utility model, and all such modifications or substitutions should be covered within the scope of the claims of this utility model.
Claims
1. A highway subgrade compaction testing device, comprising a base plate (1), the base plate being composed of a bottom plate (1-1) and side plates (1-2) extending upward from the periphery of the bottom plate, wherein a sampling hole (2) is provided through the center of the bottom plate of the base plate, characterized in that: Multiple limiting rings (3) with successively decreasing diameters are coaxially arranged inside the sampling hole. The multiple limiting rings are detachably connected to each other, and the outermost limiting ring is detachably connected to the sampling hole. The limiting ring connected to the sampling hole is the first limiting ring (3-1), the limiting ring in the middle is the second limiting ring (3-2), and the limiting ring on the innermost side is the third limiting ring (3-3). The first limiting ring (3-1) is composed of two parts: a first inner ring body (3-1-1) and a first outer ring body (3-1-2). The second limiting ring is composed of two parts: a second inner ring body (3-2-1) and a second outer ring body (3-2-2). The lower end of the inner ring of the outer ring body of the first limiting ring and the second limiting ring is connected to the upper end of the outer ring of the inner ring body. The thickness and width of the inner ring body and the outer ring body are the same. The third limiting ring is annular, and the thickness of the third limiting ring is adapted to the thickness of the outer ring of the second limiting ring; All the inner rings of each limiting ring are connected to a downwardly extending limiting sleeve (4) at their lower ends; An annular limiting ring receiving groove is provided on the bottom plate of the substrate outside the sampling hole. The width of the limiting ring receiving groove is adapted to the width of the first outer ring body of the first limiting ring, and the depth of the limiting ring receiving groove is adapted to the thickness of the first outer ring body of the first limiting ring. The first outer ring body of the first limiting ring is placed in the limiting receiving groove, the second outer ring body of the second limiting ring is placed on the first inner ring body of the first limiting ring, and the width of the third limiting ring is greater than the width of the second inner ring body of the second limiting ring. The third limiting ring is placed on the second inner ring body of the second limiting ring. Two positioning plates (5) are symmetrically provided on the bottom plates on both sides of the sampling hole, and the inner end of the positioning plate presses against the top of the installed limiting ring. The outer ends of the two positioning plates are provided with mounting holes (5-1), and positioning rods (6) are movably inserted into the mounting holes. The bottom plate of the base plate is provided with multiple positioning holes (7) arranged inside and outside for the positioning rods to pass through at the corresponding positions of the positioning plates. A positioning groove extending upwards and matching the two positioning plates is provided on the lower surface of the sand filling cylinder (8). When the sand filling cylinder is placed on the bottom plate of the substrate, the two positioning plates are exposed from the two positioning grooves. The outer surfaces of the left and right side plates of the substrate are provided with outward-facing receiving grooves (1-3). Each receiving groove is provided with a pedal (9). The pedal consists of two parts: a flat plate section (9-1) and a protruding section (9-2) connected together. The protruding section is located above the flat plate section. The protruding section consists of a vertical plate and two horizontal plates. The outward-facing ends of the two horizontal plates are fixed to the upper and lower ends of the vertical plate, respectively. The inward-facing end of the lower horizontal plate is fixed to the upper end of the flat plate section. The front and rear ends of the flat plate section of the pedal are fixed with sleeves (10). The side plates of the substrate are opened at the positions corresponding to the two sleeves. The two sleeves are inserted into the two holes of the side plates to realize the rotational connection between the sleeves and the side plates. The lower part of the flat section of the pedal has a sliding groove (11) on the outward-facing surface. A limiting rod (12) is slidably installed in the sliding groove. The limiting rod and the sliding groove are in sliding contact. An adjusting block (13) protruding from the sliding groove is fixed at one end of the limiting rod away from the side plate. The other end of the limiting rod extends into the sleeve. A limiting hole (1-4) extending into the side plate is connected in the hole of the side plate. Moving the adjusting block can allow the limiting rod to extend into the limiting hole of the side plate through the hole of the side plate.
2. The highway subgrade compaction testing device according to claim 1, characterized in that: The bottom of the positioning rod (6) is a cylindrical structure (6-1), the middle part is a prismatic structure (6-2), and the top part is a cylindrical structure. The prismatic shape is a cuboid or a triangular prism. The shape of each positioning hole matches the shape and size of the positioning rod. That is, the lower part of the positioning hole is cylindrical, the middle part is prismatic, and the upper part is cylindrical.
3. The highway subgrade compaction testing device according to claim 1 or 2, characterized in that: The limiting rod has a prism-shaped structure, and the limiting hole matches the shape of the limiting rod.
4. The highway subgrade compaction testing device according to claim 1 or 2, characterized in that: The lower surface of the lower cross plate of the protruding section of the pedal is provided with a groove (9-3).
5. The highway subgrade compaction testing device according to claim 1 or 2, characterized in that: After all the limiting rings are connected, their upper surfaces are on the same plane and also on the same plane as the upper surface of the base plate of the substrate; the lower ends of each limiting sleeve are on the same plane as the lower surface of the substrate.
6. The highway subgrade compaction testing device according to claim 1 or 2, characterized in that: The opening diameter at the bottom of the sand filling cylinder is smaller than the inner diameter of the third limiting ring, and the outer diameter of the sand filling cylinder is larger than the outer diameter of the first limiting ring.