Soft soil sampling device for geotechnical test

Abstract

The utility model discloses a soft soil sampling device for a soil test, which relates to the field of soft soil sampling, and comprises a first moving table and a second moving table, a support rod is connected between the first moving table and the second moving table, and the lower end of the first moving table is connected with a fixed rod. A first through hole is formed in the first moving table, and the telescopic mechanism is used for adjusting the soil sampling barrel to move up and down and penetrates through the first through hole to sample soil; a second through hole is further formed in the first moving table, the first through hole, the second through hole and the soil sampling barrel are coaxial, the inner diameter of the second through hole is larger than that of the first through hole, the second through hole is detachably connected with the sample cup, and the sample cup is of a barrel-shaped structure with the upper end and the lower end opened; after the second through hole is connected with the sample cup, the sample cup and the soil sampling cylinder are coaxial. According to the device, after sampling is conducted through the soil sampling cylinder, a soil sample can be rapidly and directly put into the sample cup, and alignment by operators is not needed.

Description

Technical Field

[0001] The utility model relates to the field of geotechnical tests, in particular to a soft soil sampling device used for geotechnical tests. Background Art

[0002] Soft soil is a special type of rock and soil with poor engineering properties. It is the focus and difficulty of foundation engineering. Due to the characteristics of soft soil such as low strength and easy disturbance, obtaining accurate and reliable indoor test data is the key to ensuring the quality of the project when constructing structures in soft soil areas. Soft soil geotechnical tests mainly include consolidation tests and shear tests. Since engineering designers mainly rely on data obtained from indoor tests to verify the stability and settlement of soft soil foundation treatment, it is particularly important to reduce factors that affect the accuracy of soft soil tests in the test.

[0003] In conventional geotechnical tests, a ring knife is often used to take the original soil. The ring knife is in the shape of a sleeve and is used to cut soil and take soil samples. A ring knife cover is added to the upper side of the ring knife, and the ring knife is vertically smashed into the soil layer, and then the whole is manually taken out and corrected to obtain the ring knife soil sample. However, in the existing sampling device, after the sleeve-mounted soil sampling tube is inserted into the soil layer for sampling, when the soil sample in the soil sampling tube is placed in the sample cup, it is necessary to manually align the sample cup and then put the sampled soil into the sample cup, which is troublesome and inefficient. Utility Model Content

[0004] One purpose of the utility model is to provide a soft soil sampling device for geotechnical tests, wherein a sample cup detachably connected to a first movable platform is aligned with a soil sampling tube, and after soil sampling, the soil sample in the soil sampling tube falls directly into the sample cup, and no self-alignment is required, thereby facilitating quick operation and use.

[0005] This purpose is achieved by adopting the following technical solutions:

[0006] The soft soil sampling device for geotechnical testing comprises a first mobile platform and a second mobile platform, wherein a support rod is connected between the first mobile platform and the second mobile platform, a fixing rod is connected to the lower end of the first mobile platform, a soil sampling barrel and a telescopic mechanism are connected to the second mobile platform, a first through hole is arranged on the first mobile platform, and the telescopic mechanism is used for adjusting the up and down movement of the soil sampling barrel and sampling soil through the first through hole.

[0007] In the original state, the telescopic mechanism is shortened, and the soil sampling tube is located between the first mobile platform and the second mobile platform. When soil sampling is required, the telescopic mechanism is extended, and the soil sampling tube is inserted into the soil layer through the first through hole to perform soil sampling. After soil sampling is completed, the telescopic mechanism is shortened, and the soil sampling tube drives the soil sample to move upward.

[0008] In the existing device, on this basis, the operator manually aligns the sample cup with the soil sampling barrel, and needs to support the sample cup until the soil sample falls into the sample cup. The operation is cumbersome and inefficient, and there is a risk that the soil sample cannot fall directly into the sample cup.

[0009] Based on this, the utility model also arranges a second through hole on the first moving platform, the first through hole, the second through hole and the soil sampling tube are coaxial, the inner diameter of the second through hole is larger than the inner diameter of the first through hole, the second through hole is detachably connected to the sample cup, and the sample cup is a cylindrical structure with both upper and lower ends open; after the second through hole is connected to the sample cup, the sample cup is coaxial with the soil sampling tube. The lower end of the sample cup is detachably connected to the bottom cover, and the bottom cover is used to cover the opening at the lower end of the sample cup.

[0010] During use, when the soil sample needs to be loaded into the sample cup, the telescopic mechanism drives the soil barrel to be located between the first movable platform and the second movable platform, and then the upper end of the sample cup is connected to the second through hole. The sample cup and the soil barrel are coaxial, and the inner diameter of the sample cup is larger than the inner diameter of the soil barrel. Therefore, when the soil sample falls from the soil barrel, it can fall directly and completely into the sample cup.

[0011] Preferably, the outer diameter of the soil taking tube is smaller than the inner diameter of the sample cup. Before taking soil, the sample cup can be directly connected to the first mobile platform, and when taking soil, the soil taking tube passes through the inside of the sample cup to take soil.

[0012] In addition, when the soil sample is moved upward together, there is a risk that the soil sample will fall off during the process. When the soil sample falls off, the device can be directly placed in the sample cup, which is more convenient to use.

[0013] The bottom cover is detachably connected to the side of the sample cup. Preferably, the bottom cover is detachably connected to the side of the sample cup via a magnet layer, which is convenient for quick operation and use.

[0014] The telescopic mechanism comprises a first telescopic rod, the upper end of which is connected to the second moving platform, the lower end of which is connected to the soil collecting barrel, and the first telescopic rod drives the soil collecting barrel to move up and down by telescoping.

[0015] Furthermore, a movable plate is provided in the soil sampling barrel, and the movable plate is connected with an adjusting rod, and the adjusting rod includes a second telescopic rod and a spring rod, one end of the second telescopic rod is connected to the second movable platform, the other end of the second telescopic rod is connected to one end of the spring rod, and the other end of the spring rod is connected to the movable plate; when the soil sampling barrel takes soil, the spring rod is compressed and the movable plate moves upward; when the soil sampling barrel puts the soil sample into the sample cup, the second telescopic rod is extended, and the movable plate drives the soil sample to move downward into the sample cup.

[0016] When the soil sample needs to be put into the sample cup, the moving plate is used to assist the operation, so that the soil sample can be quickly put into the sample cup.

[0017] At the same time, a pressure sensor is provided at the sampling height of the inner side of the soil sampling barrel, and the pressure sensor is used to receive the pressure signal of the moving plate. When the soil sample is loaded into the soil sampling barrel, the upper end of the soil sample contacts the moving plate and drives the moving plate to move upward. When the moving plate moves to the pressure sensor, the soil sampling barrel has taken the required soil sample.

[0018] Preferably, a pulley is provided at the lower end of the fixing rod. The fixing rod is a telescopic rod with adjustable length. The fixing rod can adjust the height of the entire device and drive the device to move.

[0019] Compared with the prior art, the utility model has the following advantages and beneficial effects:

[0020] The utility model discloses a soft soil sampling device for geotechnical tests. After sampling through a soil sampling tube, the device can quickly and directly put the soil sample into a sample cup without the need for an operator to perform alignment.

[0021] Furthermore, when the soil sample is put into the sample cup, the soil sample is quickly put into the sample cup through the moving plate, thereby further improving the use efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The drawings described herein are used to provide a further understanding of the embodiments of the present utility model, constitute a part of this application, and do not constitute a limitation of the embodiments of the present utility model. In the drawings:

[0023] Figure 1 This is a schematic diagram of the structure of the device in Example 1;

[0024] Figure 2 This is a schematic diagram of the structure of the device after the second through hole in Example 1 is connected to the sample cup;

[0025] Figure 3 A top view of the upper end of the soil sampling tube in Example 3;

[0026] Figure 4 This is a schematic diagram of the structure of the device when the movable plate in Example 3 moves upward to the pressure sensor;

[0027] Figure 5 It is a schematic diagram of the structure of the device when the soil sampling tube moves to above the sample cup in Example 3;

[0028] Figure 6 This is a schematic diagram of the structure of the device when the movable plate in Example 3 drives the soil sample to move downward into the sample cup.

[0029] Marks and corresponding parts names in the attached drawings:

[0030] 1-first moving platform, 2-second moving platform, 3-support rod, 4-soil taking tube, 5-first telescopic rod, 6-adjusting rod, 7-moving plate, 8-second through hole, 9-first through hole, 10-fixing rod, 11-connecting plate, 12-sample cup, 13-bottom cover. DETAILED DESCRIPTION

[0031] In order to make the purpose, technical solutions and advantages of the utility model more clearly understood, the utility model is further described in detail below in conjunction with embodiments and drawings. The schematic implementation manner of the utility model and its description are only used to explain the utility model and are not intended to limit the utility model.

[0032] In the description of the present invention, it should be understood that the terms "front", "rear", "left", "right", "up", "down", "vertical", "horizontal", "high", "low", "inside", "outside", etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as limiting the scope of protection of the present invention.

[0033] Example 1

[0034] like Figure 1 As shown, the device includes a first movable platform 1 and a second movable platform 2, a support rod 3 is connected between the first movable platform 1 and the second movable platform 2, a fixing rod 10 is connected to the lower end of the first movable platform 1, a soil collecting barrel 4 and a telescopic mechanism are connected to the second movable platform 2, a first through hole 9 is provided on the first movable platform 1, the telescopic mechanism is used to adjust the up and down movement of the soil collecting barrel 4, and to collect soil through the first through hole 9; a second through hole 8 is also provided on the first movable platform 1, the first through hole 9, the second through hole 8 and the soil collecting barrel 4 are coaxial, the inner diameter of the second through hole 8 is larger than the inner diameter of the first through hole 9, and the second through hole 8 is detachably connected to the sample cup 12.

[0035] After the second through hole 8 is connected to the sample cup 12, Figure 2 As shown, the sample cup 12 is coaxial with the soil sampling tube 4.

[0036] When using, Figure 1 The device shown is moved to the position where soil needs to be taken, and the telescopic mechanism is adjusted to move the soil sampling tube 4 downward and insert it into the soil layer, and the soil sample is taken into the sample cup. The telescopic mechanism is adjusted, and the soil sampling tube 4 drives the soil sample to move upward together, and then the sample cup 12 is connected to the first through hole 9 on the first movable platform 1, and the soil sample in the sample cup falls directly into the sample cup, and the sample cup is removed to complete the sampling.

[0037] In some embodiments, the telescopic mechanism includes a first telescopic rod 5, the upper end of the first telescopic rod 5 is connected to the second mobile platform 2, the lower end of the first telescopic rod 5 is connected to the soil collecting barrel 4, and the first telescopic rod 5 drives the soil collecting barrel 4 to move up and down by telescoping. A connecting plate 11 is provided on the side of the soil collecting barrel 4, and the lower end of the first telescopic rod 5 is connected to the connecting plate 11 at the soil collecting barrel 4.

[0038] Example 2

[0039] On the basis of the above embodiment, a pulley is provided at the lower end of the fixed rod 10. The fixed rod 10 is a telescopic rod with adjustable length. In some embodiments, the sample cup 12 is a cylindrical structure with both upper and lower ends open, and the outer diameter of the soil sampling tube 4 is smaller than the inner diameter of the sample cup 12. The lower end of the sample cup 12 is detachably connected to the bottom cover 13, and the bottom cover 13 is used to cover the opening at the lower end of the sample cup 12. The bottom cover 13 is detachably connected to the side of the sample cup 12. Preferably, the bottom cover 13 is detachably connected to the side of the sample cup 12 through a magnet layer. When the sample cup is connected to the first through hole, the soil sampling tube 4 moves downward through the interior of the sample cup and enters the soil layer. After taking soil, the soil sampling tube 4 drives the soil sample to move upward together. When the lower end of the soil sampling tube 4 exceeds the lower end of the sample cup, the bottom cover 13 on the side of the sample cup 12 is removed and connected to the opening at the lower end of the sample cup 12. The soil sampling tube continues to move upward, and the soil sample falls into the sample cup.

[0040] In some embodiments, the sample cup 12 is a cylindrical structure with an open upper end. After the soil sampling tube takes soil and moves upward to between the first movable platform and the second movable platform, the sample cup is connected to the first through hole and the soil sample falls into the sample cup.

[0041] Example 3

[0042] On the basis of the above embodiment, a movable plate 7 is provided in the soil taking cylinder 4, and the movable plate 7 is connected to the adjusting rod 6, and the adjusting rod 6 includes a second telescopic rod and a spring rod, one end of the second telescopic rod is connected to the second movable platform 2, the other end of the second telescopic rod is connected to one end of the spring rod, and the other end of the spring rod is connected to the movable plate 7; Figure 3 As shown, the adjusting rod 6 passes through the upper end of the soil sampling tube 4 and is connected to the moving plate 7. A pressure sensor is provided at the sampling height of the inner side of the soil sampling tube 4, and the pressure sensor is used to receive the pressure signal of the moving plate 7.

[0043] When the soil sampling tube 4 is taking soil, the first telescopic rod and the second telescopic rod are extended at the same time, the soil sampling tube 4 and the movable plate move downward, and the soil sampling tube 4 continuously loads the soil sample into the soil sampling tube. When the upper end of the soil sample contacts the movable plate, Figure 4As shown, the spring rod is compressed and the movable plate 7 moves upward. When the movable plate 7 moves upward to the pressure sensor, the pressure sensor receives a pressure signal, the required soil sample is taken in the soil barrel, the first telescopic rod and the second telescopic rod stop extending, and at the same time, the first telescopic rod and the second telescopic rod are shortened at the same time, driving the soil barrel and the soil sample therein to move upward together.

[0044] like Figure 5 As shown, when the soil sampling tube 4 moves to the top of the sample cup, the second telescopic rod is extended, and the movable plate 7 drives the soil sample to move downward into the sample cup 12, as shown in FIG. Figure 6 shown.

[0045] The terms "first", "second", etc. used herein are only used to distinguish the corresponding components for the sake of clarity of description, and are not intended to limit any order or emphasize importance, etc. In addition, the term "connected" used herein, unless otherwise specified, may refer to direct connection or indirect connection via other components.

[0046] The specific implementation methods described above further illustrate the purpose, technical solutions and beneficial effects of the utility model in detail. It should be understood that the above description is only the specific implementation method of the utility model and is not used to limit the protection scope of the utility model. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the utility model should be included in the protection scope of the utility model.

Claims

1. A soft soil sampling device for geotechnical testing, comprising a first mobile platform (1) and a second mobile platform (2), wherein a support rod (3) is connected between the first mobile platform (1) and the second mobile platform (2), and a fixing rod (10) is connected to the lower end of the first mobile platform (1), characterized in that: The second movable platform (2) is connected to a soil taking cylinder (4) and a telescopic mechanism, the first movable platform (1) is provided with a first through hole (9), and the telescopic mechanism is used to adjust the soil taking cylinder (4) to move up and down and to take soil through the first through hole (9); The first moving platform (1) is also provided with a second through hole (8); the first through hole (9), the second through hole (8) and the soil sampling tube (4) are coaxial; the inner diameter of the second through hole (8) is greater than the inner diameter of the first through hole (9); the second through hole (8) is detachably connected to the sample cup (12); and the sample cup (12) is a cylindrical structure with openings at both the upper and lower ends; After the second through hole (8) is connected to the sample cup (12), the sample cup (12) and the soil sampling tube (4) are coaxial.

2. The soft soil sampling device for geotechnical testing according to claim 1, characterized in that: The lower end of the sample cup (12) is detachably connected to a bottom cover (13), and the bottom cover (13) is used to cover the opening of the lower end of the sample cup (12).

3. The soft soil sampling device for geotechnical testing according to claim 2, characterized in that: The bottom cover (13) is detachably connected to the side of the sample cup (12).

4. The soft soil sampling device for geotechnical testing according to claim 1, characterized in that: The telescopic mechanism comprises a first telescopic rod (5), the upper end of the first telescopic rod (5) is connected to the second moving platform (2), the lower end of the first telescopic rod (5) is connected to the soil collecting barrel (4), and the first telescopic rod (5) drives the soil collecting barrel (4) to move up and down by telescoping.

5. The soft soil sampling device for geotechnical testing according to claim 1, characterized in that: A movable plate (7) is arranged in the soil sampling tube (4), the movable plate (7) is connected to an adjusting rod (6), the adjusting rod (6) comprises a second telescopic rod and a spring rod, one end of the second telescopic rod is connected to the second movable platform (2), the other end of the second telescopic rod is connected to one end of the spring rod, and the other end of the spring rod is connected to the movable plate (7); when the soil sampling tube (4) is sampling soil, the spring rod is compressed and the movable plate (7) moves upward; when the soil sampling tube (4) is loading the soil sample into the sample cup (12), the second telescopic rod is extended and the movable plate (7) drives the soil sample to move downward into the sample cup (12).

6. The soft soil sampling device for geotechnical testing according to claim 1, characterized in that: The outer diameter of the soil sampling tube (4) is smaller than the inner diameter of the sample cup (12).

7. The soft soil sampling device for geotechnical testing according to claim 1, characterized in that: The lower end of the fixing rod (10) is provided with a pulley.

8. The soft soil sampling device for geotechnical testing according to claim 1, characterized in that: The fixing rod (10) is a telescopic rod with adjustable length.

9. The soft soil sampling device for geotechnical testing according to claim 5, characterized in that: A pressure sensor is provided at the sampling height on the inner side surface of the soil sampling tube (4), and the pressure sensor is used to receive the pressure signal of the movable plate (7).

10. The soft soil sampling device for geotechnical testing according to claim 3, characterized in that: The bottom cover (13) is detachably connected to the side of the sample cup (12) via a magnetic layer.

Images