Subgrade foundation settlement detection device

Abstract

The utility model discloses a roadbed foundation settlement detection device, which belongs to the technical field of roadbed settlement detection and comprises a first bottom plate, a first through hole is formed in the inner wall of the first bottom plate, a first threaded mounting seat is arranged at the center of the top of the first bottom plate, and a first settlement sleeve is slidably connected in the first through hole. A second bottom plate is fixedly mounted at the top of the first sedimentation sleeve; existing settlement pile structures are combined for use, the three sets of measuring rods are nested together, the three sets of settlement plates and the roadbed foundation are poured and buried in a layered mode to achieve independent and isolated use, an external protection sleeve is removed in the detection process, and through the first observation window and the second observation window, the settlement pile can be detected. A level gauge or a total station is used for independently observing data of observation points of each group of measuring rods, the purpose of accurately recording settlement data is achieved, meanwhile, the specific settlement amount of different structural layers of the roadbed is achieved, finally, the installation and use cost of the settlement pile is saved, and the observation efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of subgrade settlement detection, in particular to a subgrade foundation settlement detection device. Background Technique

[0002] Subgrade settlement detection plays a crucial role in road construction. By observing subgrade settlement, potential problems can be discovered and solved in a timely manner to ensure the quality and safety of road construction.

[0003] In a Chinese utility model patent for a highway settlement depth detection device with the document number CN219218615U, it includes a basic component, a road surface detection mechanism, other components, and a subgrade detection mechanism. The subgrade detection mechanism is arranged inside the basic component, the other components are arranged at the top of the subgrade detection mechanism, and the road surface detection mechanism is arranged at the top of the other components. The problem of the existing device being unable to accurately measure the settlement of each layer inside the subgrade is solved by a layered component.

[0004] However, the above device also has drawbacks during use. The settlement data of each layer of the subgrade foundation is read through its own detection scale. Since the change amount of the foundation settlement is small, high-precision instruments such as a level, an inclinometer, and a GPS are required for detection to accurately determine the settlement amount. Moreover, the basic embedded parts of the above patent are still arranged on the road shoulder and are not within the same range as the subgrade foundation to be detected, further reducing the detection accuracy.

[0005] The existing subgrade settlement detection device collects and analyzes data by observing the reserved subgrade settlement piles. However, when detecting multiple layers of the subgrade foundation, settlement piles need to be separately arranged, which not only increases the usage cost and installation cost of the settlement piles but also increases the workload of observation.

[0006] Therefore, a new detection device is needed to solve the above problems. Content of the Utility Model

[0007] The main purpose of the utility model is to provide a subgrade foundation settlement detection device, which solves the drawback that the existing subgrade settlement device cannot perform layered detection.

[0008] The purpose of the utility model can be achieved by adopting the following technical solutions:

[0009] A subgrade foundation settlement detection device includes a first bottom plate. A first through hole is opened in the inner wall of the first bottom plate. A first threaded mounting seat is arranged at the center of the top of the first bottom plate. A first settlement sleeve is slidably connected in the first through hole. A second bottom plate is fixedly installed at the top of the first settlement sleeve.

[0010] A second through hole communicating with the inner wall of the first settlement sleeve is formed in the inner wall of the second bottom plate. A second settlement sleeve is slidably connected in the second through hole. A third bottom plate is fixedly installed at the top of the second settlement sleeve.

[0011] A first measuring rod is threadedly installed in the first threaded mounting seat.

[0012] Further, the second settlement sleeve can slide along the inner wall of the first settlement sleeve. A second threaded mounting seat is fixed at the top of the second bottom plate. A second measuring rod is detachably installed in the inner wall of the second threaded mounting seat. The first measuring rod penetrates through the second bottom plate and extends into the second measuring rod. First observation windows are symmetrically formed in the outer wall of the second measuring rod.

[0013] Further, a third threaded mounting seat is welded to the top of the third bottom plate. A third measuring rod is threadedly connected in the third threaded mounting seat. The second measuring rod penetrates through the third bottom plate and extends into the third measuring rod. Second observation windows are symmetrically formed in the outer wall of the third measuring rod.

[0014] Further, a first measuring top cap is threadedly connected to the top of the first measuring rod. A second measuring top cap is threadedly connected to the top of the second measuring rod. A third measuring top cap is threadedly connected to the top of the third measuring rod.

[0015] Further, a protection sleeve is movably installed around the third measuring rod. The protection sleeve includes a docking wire and a protective cover.

[0016] Further, a soil layer is arranged around the first bottom plate. A cushion layer is arranged around the second bottom plate. A base layer is arranged around the third bottom plate.

[0017] The beneficial technical effects of the present utility model:

[0018] By combining the existing settlement pile structures, the present utility model nests three groups of measuring rods together. The three settlement plates are cast and buried in layers with the subgrade foundation for independent and isolated use. When detecting, the external protection sleeve is removed. Through the first observation window and the second observation window, a level or a total station is used to independently observe the data of the observation points of each group of measuring rods, achieving the purpose of accurately recording the settlement data. At the same time, the specific settlement amounts of different structural layers of the subgrade are realized. Finally, the installation and use costs of the settlement piles are saved, and the observation efficiency is improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic structural diagram of a preferred embodiment of a subgrade foundation settlement detection device according to the present utility model;

[0020] Figure 2Schematic diagram of the structure of a subgrade foundation settlement detection device according to a preferred embodiment of the present utility model after removing the protective sleeve;

[0021] Figure 3 Stereogram of the third bottom plate and its attached structures in a preferred embodiment of a subgrade foundation settlement detection device according to the present utility model;

[0022] Figure 4 Stereogram of the second bottom plate and its attached structures in a preferred embodiment of a subgrade foundation settlement detection device according to the present utility model;

[0023] Figure 5 Stereogram of the first bottom plate and its attached structures in a preferred embodiment of a subgrade foundation settlement detection device according to the present utility model;

[0024] Figure 6 Cross-sectional view of the subgrade foundation settlement detection device according to a preferred embodiment of the present utility model when in contact with the subgrade foundation layer during detection.

[0025] Explanation of the reference numerals is as follows:

[0026] 1. First bottom plate; 101. First measuring rod; 102. First measuring top cap; 103. First through hole; 104. First threaded mounting seat;

[0027] 2. Second bottom plate; 201. First settlement sleeve; 202. Second measuring rod; 203. Second measuring top cap; 204. First observation window; 205. Second through hole; 206. Second threaded mounting seat;

[0028] 3. Third bottom plate; 301. Second settlement sleeve; 302. Third measuring rod; 303. Third measuring top cap; 304. Second observation window; 305. Third threaded mounting seat;

[0029] 4. Protective sleeve; 5. Docking wire; 6. Protective cover; 7. Soil layer; 8. Cushion layer; 9. Base layer; 10. Surface layer. Detailed implementation manners

[0030] To make the technical solutions of the present utility model clearer and more definite to those skilled in the art, the present utility model will be further described in detail below in conjunction with embodiments and the accompanying drawings. However, the implementation manners of the present utility model are not limited thereto.

[0031] As Figures 1-6As shown in the figure, a subgrade foundation settlement detection device provided in this embodiment includes a first bottom plate 1. A first through hole 103 is opened in the inner wall of the first bottom plate 1. A first threaded mounting seat 104 is provided at the center of the top of the first bottom plate 1. A first settlement sleeve 201 is slidably connected in the first through hole 103. The first settlement sleeve 201 is a hollow plastic pipe. A second bottom plate 2 is fixedly installed at the top of the first settlement sleeve 201;

[0032] As Figure 2 shown in the figure, a second through hole 205 communicating with the inner wall of the first settlement sleeve 201 is opened in the inner wall of the second bottom plate 2. A second settlement sleeve 301 is slidably connected in the second through hole 205. A third bottom plate 3 is fixedly installed at the top of the second settlement sleeve 301. The second bottom plate 2 can settle in the cushion layer 8. When settling, the first settlement sleeve 201 can freely slide along the first reserved hole of the first bottom plate 1 and play a role of vertical limiting sliding. Similarly, the third bottom plate 3 can settle in the base course 9. The second settlement sleeve 301 slides in the inner wall of the first settlement sleeve 201. The diameter of the first settlement sleeve 201 is 10 mm, and the diameter of the second settlement sleeve 301 is 7 mm;

[0033] As Figure 5 shown in the figure, a first measuring rod 101 is threadedly installed in the first threaded mounting seat 104.

[0034] As Figures 1-5 shown in the figure, the second settlement sleeve 301 can slide along the inner wall of the first settlement sleeve 201. A second threaded mounting seat 206 is fixed at the top of the second bottom plate 2. A second measuring rod 202 is detachably installed in the inner wall of the second threaded mounting seat 206. The first measuring rod 101 penetrates through the second bottom plate 2 and extends into the second measuring rod 202. First observation windows 204 are symmetrically opened on the outer wall of the second measuring rod 202. The first observation windows 204 can expose the first measuring top cap 102 and the second measuring top cap 203, facilitating the use of a level to observe and record the settlement amount.

[0035] As Figures 2-3 shown in the figure, a third threaded mounting 305 is welded at the top of the third bottom plate 3. A third measuring rod 302 is threadedly connected in the third threaded mounting 305. The second measuring rod 202 penetrates through the third bottom plate 3 and extends into the third measuring rod 302. Second observation windows 304 are symmetrically opened on the outer wall of the third measuring rod 302. The first, second, and third measuring rods are all hollow metal pipes. Due to the opening structure of the first observation windows 204 and the second observation windows 304, the protective sleeve 4 plays a role of sealing and protection.

[0036] As Figures 2-5As shown in the figure, a first measuring cap 102 is threadedly connected to the top of the first measuring rod 101, a second measuring cap 203 is threadedly connected to the top of the second measuring rod 202, and a third measuring cap 303 is threadedly connected to the top of the third measuring rod 302.

[0037] As Figure 1 shown, a protective sleeve 4 is movably installed around the third measuring rod 302. The protective sleeve 4 includes a butt joint wire 5 and a protective cover 6. The protective sleeve 4 is composed of two sections, which are connected by the butt joint wire 5. One section is in the subgrade base layer and the other section is in the air, and it can be flexibly disassembled.

[0038] As Figure 6 shown, a soil layer 7 is arranged around the first bottom plate 1, a cushion layer 8 is arranged around the second bottom plate 2, and a base layer 9 is arranged around the third bottom plate 3.

[0039] The working principle of this device: When paving the subgrade base, the first bottom plate 1 is buried and contacted with the soil layer 7, the first measuring rod 101 vertically penetrates out of the soil layer 7, the second bottom plate 2 is buried and contacted with the cushion layer 8, the first settlement sleeve 201 is slidably connected in alignment with the first through hole 103 on the first bottom plate 1. At the same time, the second measuring rod 202 is wrapped around the outside of the first measuring rod 101. The third bottom plate 3 is buried and contacted with the base layer 9, the second settlement sleeve 301 is slidably connected in alignment with the second through hole 205 on the second bottom plate 2, and it can also be slidably connected with the first settlement sleeve 201. The third measuring rod 302 is wrapped around the outside of the second measuring rod 202. Finally, the protective sleeve 4 is movably placed on the third bottom plate 3, and the surface layer 10 is paved, then the contact installation of each settlement plate and the subgrade base layer can be completed.

[0040] During observation, the exposed protective sleeve 4 is removed through the butt joint wire 5, so that the first measuring cap 102 and the second measuring cap 203 are exposed from the first observation window 204 and the second observation window 304. With the third measuring cap 303 on the top, the staff can use a level to conduct synchronous measurements and measure the settlement amounts of different layers respectively.

[0041] The above is only a further embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any person skilled in the art within the scope disclosed by the present utility model, according to the technical solution and its concept of the present utility model, makes equivalent substitutions or changes, all belong to the protection scope of the present utility model.

Claims

1. A subgrade foundation settlement detection device, comprising a first bottom plate (1), a first through hole (103) is opened in the inner wall of the first bottom plate (1), and a first threaded mounting seat (104) is arranged at the center of the top of the first bottom plate (1), characterized in that: A first sedimentation sleeve (201) is slidably connected in the first through hole (103), and a second bottom plate (2) is fixedly installed at the top of the first sedimentation sleeve (201); A second through hole (205) communicating with the inner wall of the first sedimentation sleeve (201) is formed in the inner wall of the second bottom plate (2), a second sedimentation sleeve (301) is slidably connected in the second through hole (205), and a third bottom plate (3) is fixedly installed at the top of the second sedimentation sleeve (301); A first measuring rod (101) is threadedly installed in a first threaded mounting seat (104); The second sedimentation sleeve (301) can slide along the inner wall of the first sedimentation sleeve (201), a second threaded mounting seat (206) is fixed to the top of the second bottom plate (2), a second measuring rod (202) is detachably installed in the inner wall of the second threaded mounting seat (206), the first measuring rod (101) penetrates through the second bottom plate (2) and extends into the second measuring rod (202), and first observation windows (204) are symmetrically formed in the outer wall of the second measuring rod (202); A third threaded mounting (305) is welded to the top of the third bottom plate (3), a third measuring rod (302) is threadedly connected in the third threaded mounting (305), the second measuring rod (202) penetrates through the third bottom plate (3) and extends into the third measuring rod (302), and second observation windows (304) are symmetrically formed in the outer wall of the third measuring rod (302).

2. The subgrade foundation settlement detection device according to claim 1, wherein: A first measuring top cap (102) is threadedly connected to the top of the first measuring rod (101), a second measuring top cap (203) is threadedly connected to the top of the second measuring rod (202), and a third measuring top cap (303) is threadedly connected to the top of the third measuring rod (302).

3. The subgrade foundation settlement detection device according to claim 2, characterized in that: A protective sleeve (4) is movably installed around the third measuring rod (302), and the protective sleeve (4) includes a butt wire (5) and a protective cover (6).

4. The subgrade foundation settlement detection device according to claim 3, characterized in that: A soil layer (7) is arranged around the first bottom plate (1), a cushion layer (8) is arranged around the second bottom plate (2), and a base layer (9) is arranged around the third bottom plate (3).

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