Pressure cell assembly for testing mechanical characteristics of rock and soil

Abstract

The invention relates to the technical field of geotechnical engineering testing, and discloses a pressure box assembly for testing geotechnical mechanical characteristics, the pressure box assembly comprises a pressure box and further comprises a drilling assembly, the drilling assembly comprises a supporting frame and a drilling device body, the supporting frame is connected to the ground through a stabilizing piece, the drilling device body is fixedly connected to the supporting frame, and the stabilizing piece is fixedly connected to the drilling device body. The drilling end of the drilling device body is fixedly connected with a circular plate, a drilling piece is arranged on the circular plate, and the drilling piece is used for drilling holes into soil and collecting the drilled soil into the drilling piece; and the mounting assembly comprises two mounting boxes, the two mounting boxes extend into the soil in the drilling piece from the two opposite sides of the drilling piece respectively, connecting pieces are arranged on the two mounting boxes, and the mounting boxes are used for containing the pressure boxes. The purpose of in-situ detection of the internal stress of the soil layer without artificial external force introduction is achieved, the detection initial value can accurately reflect the internal stress of the soil layer, and the long-term detection value is stable and real.

Description

Technical Field

[0001] The invention relates to the technical field of geotechnical engineering testing, and in particular to a pressure box assembly for testing geotechnical mechanical characteristics. Background Art

[0002] Pressure cells are usually used to detect changes in stress inside the soil layer at a preset location in the soil layer. This facilitates monitoring of the geotechnical properties around the construction site during construction. It is also used for long-term monitoring of the geotechnical state around the building after construction is completed.

[0003] In the prior art, the pressure box usually needs to be placed in rock and soil, and it is often necessary to first drill a hole at the placement position, then place the pressure box in the hole, and backfill the drill hole after placing the pressure box. On the one hand, the placed pressure box cannot guarantee the balance angle in the rock and soil layer. On the other hand, the purpose of in-situ detection of stress in the soil layer cannot be achieved after backfilling after excavation. The initial detection value cannot accurately reflect the internal stress of the soil layer, and there is a large deviation in the long-term detection value.

[0004] Therefore, there is an urgent need for a pressure box assembly for testing geotechnical mechanical characteristics to solve the above problems. Summary of the invention

[0005] The purpose of the present invention is to provide a pressure box assembly for testing geotechnical mechanical characteristics, so as to solve the problems existing in the above-mentioned prior art.

[0006] To achieve the above object, the present invention provides the following solution: The present invention provides a pressure cell assembly for testing geotechnical mechanical characteristics, including a pressure cell and:

[0007] A drilling assembly, the drilling assembly comprising a support frame and a drilling device body, the support frame being connected to the ground through a stabilizing member, the drilling device body being fixedly connected to the support frame, a circular plate being fixedly connected to the drilling end of the drilling device body, a drilling member being arranged on the circular plate, the drilling member being used to drill into the soil and collect the drilled soil in the drilling member;

[0008] The installation component includes two installation boxes, which extend into the soil in the drilling member from opposite sides of the drilling member respectively. Connecting parts are arranged on the two installation boxes, and the pressure box is placed in the installation boxes.

[0009] Preferably, the drilling member includes a plurality of frames fixedly connected to the bottom end of the top plate at equal intervals along the circumferential direction, storage grooves are provided on both sides of the frames, baffles are slidably connected in the storage grooves, adjacent two baffles on two adjacent frames are contactingly arranged, the plurality of frames and the storage grooves form a tubular structure, a driving member is provided on the top plate, and the plurality of baffles are respectively connected to the driving member.

[0010] Preferably, the driving member includes a support frame fixedly connected to the top plate, one end of a plurality of electric telescopic rods are hinged on the support frame at equal intervals in the circumferential direction, the other end of the electric telescopic rod is hinged to a push plate, the push plate is slidably connected to the top plate, the top end of the baffle is fixedly connected to a toggle plate, the top end of the toggle plate extends out of the top plate and is hinged to one end of a toggle rod, the other end of the toggle rod is rotatably connected to the top plate via a rotating shaft, a gear is fixedly connected to the rotating shaft, the push plate is located between the two gears on the same frame, and the two gears are respectively meshed with the push plate.

[0011] Preferably, the baffle is provided with a plurality of through holes at equal intervals in the axial direction, a slide groove is provided on the inner wall of the through hole, a sealing plate is slidably connected in the slide groove via a first spring, and the sealing plate is used to seal the through hole.

[0012] Preferably, the installation box is adapted to the through hole, and the two installation boxes extend into the tubular structure from two opposite through holes respectively for separating the soil. The installation box includes a top plate, a bottom plate and two side plates, and the two side plates are respectively fixedly connected on both sides between the top plate and the bottom plate. The installation box also includes a movable frame, and the movable frame is detachably connected to the top plate and the bottom plate through the connecting piece, and the pressure box is arranged in the movable frame.

[0013] Preferably, the connecting member includes two vertical grooves opened on the movable frame, a sliding rod is fixedly connected in the vertical groove, both ends of the sliding rod are slidably connected to sliders, one end of the connecting rod is fixedly connected to the slider, and connecting holes are opened on the opposite sides of the top plate and the bottom plate, and the other end of the connecting rod passes through the movable frame and extends into the connecting hole.

[0014] Preferably, the stabilizing member comprises a plurality of stabilizing rods threadedly connected to the support frame, and the bottom ends of the stabilizing rods are conical structures extending into the soil layer.

[0015] Preferably, a handle is fixedly connected to the sliding block.

[0016] Preferably, both ends of the slide rod are sleeved with a second spring, and both ends of the second spring are fixedly connected to the inner wall of the vertical groove and the slide block respectively.

[0017] Preferably, a lead-out hole is provided on the movable frame, and the lead-out hole is adapted to the cable on the pressure box.

[0018] Compared with the prior art, the present invention has the following advantages and technical effects:

[0019] The present invention provides a pressure box assembly for testing geotechnical mechanical characteristics. The support frame is connected to the ground through a stabilizing member. After the connection, the drilling device body is set to drive the drilling member to perform drilling operations. During the drilling operation, the soil in the hole is collected into the drilling member, and then the drilling member is taken out together with the soil. The installation box is inserted into the specified soil layer of the drilling member to separate the soil. The pressure box is taken out and a hole is dug in the separated soil to put it into the pressure box, and then it is placed back into the soil layer. The installation box is taken out and the pressure box is left in the soil. The soil is placed back into the drilled hole through the drilling member, thereby realizing the burial of the pressure box in the soil. The present invention has a simple structure and is easy to operate. It ensures the angle of the pressure box placement, realizes the purpose of no artificial external force introduction, and can detect the stress in the soil layer in situ. The initial value of the detection can accurately reflect the internal stress of the soil layer, and the long-term detection value is stable and true. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments are briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative labor:

[0021] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0022] Figure 2 This is a schematic diagram of the expanded structure of the baffle of the present invention;

[0023] Figure 3 This is a schematic diagram of the sealing plate structure of the present invention;

[0024] Figure 4 It is a schematic diagram of the structure of the connecting piece of the present invention;

[0025] Figure 5 It is a schematic diagram of the side structure of the movable frame of the present invention;

[0026] Among them, 1. pressure box; 2. support frame; 3. installation box; 31. top plate; 32. bottom plate; 33. side plate; 34. moving frame; 4. round plate; 5. frame; 6. storage slot; 7. baffle; 8. support frame; 9. electric telescopic rod; 10. push plate; 11. toggle plate; 12. toggle rod; 13. rotating shaft; 14. gear; 15. through hole; 16. slide groove; 17. first spring; 18. sealing plate; 19. vertical groove; 20. slide rod; 21. slider; 22. connecting rod; 23. connecting hole; 24. stabilizing rod; 25. handle; 26. second spring; 27. lead-out hole; 28. cable; 29. ​​drilling device body. DETAILED DESCRIPTION

[0027] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0028] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0029] Reference Figure 1-Figure 5 The present invention provides a pressure cell assembly for testing geotechnical mechanical characteristics, comprising a pressure cell 1, and further comprising:

[0030] The drilling assembly includes a support frame 2 and a drilling device body 29. The support frame 2 is connected to the ground through a stabilizing member. The drilling device body 29 is fixedly connected to the support frame 2. A circular plate 4 is fixedly connected to the drilling end of the drilling device body 29. A drilling member is provided on the circular plate 4. The drilling member is used to drill into the soil and collect the drilled soil in the drilling member.

[0031] The installation assembly includes two installation boxes 3, which extend into the soil in the drilling member from opposite sides of the drilling member respectively. Connecting parts are arranged on the two installation boxes 3, and the pressure box 1 is placed in the installation boxes 3.

[0032] In one embodiment of the present invention, the support frame 2 is connected to the ground through a stabilizing member. After the connection, the drilling device body 29 is provided to drive the drilling member to perform drilling operations. During the drilling operation, the soil in the hole is collected into the drilling member, and then the drilling member is taken out together with the soil, and the installation box 3 is inserted into the specified soil layer of the drilling member to separate the soil, and the pressure box 1 is taken out and a hole is dug in the separated soil to be placed, and then the pressure box 1 is placed back into the soil layer, and the installation box 3 is taken out to leave the pressure box 1 in the soil, and the soil is placed back into the drilled hole through the drilling member, thereby realizing the burial of the pressure box 1 in the soil, achieving the purpose of basically no artificial external force introduction, and being able to detect the internal stress of the soil layer in situ. The initial value of the detection can accurately reflect the internal stress of the soil layer, and the long-term detection value is stable and true.

[0033] A further optimized solution is that the drilling member includes a plurality of frames 5 fixedly connected to the bottom end of the top plate 4 at equal intervals along the circumferential direction, both sides of the frames 5 are provided with receiving grooves 6, baffles 7 are slidably connected in the receiving grooves 6, adjacent baffles 7 on two adjacent frames 5 are arranged in contact with each other, the plurality of frames 5 and the receiving grooves 6 form a tubular structure, a driving member is provided on the top plate 4, and the plurality of baffles 7 are respectively connected to the driving member.

[0034] In one embodiment of the present invention, referring to Figure 2 The frame 5 is inserted into the soil and rotated, and the baffle 7 is extended out of the receiving groove 6 to expand and dock. A plurality of frames 5 and a plurality of baffles 7 form a tubular structure for drilling, and the soil in the drilling process is collected in the tubular structure.

[0035] A further optimized solution is that the driving member includes a support frame 8 fixedly connected to the top plate 4, and one end of a plurality of electric telescopic rods 9 are hinged on the support frame 8 at equal intervals along the circumferential direction, and a push plate 10 is hinged on the other end of the electric telescopic rod 9, and the push plate 10 is slidably connected to the top plate 4. A toggle plate 11 is fixedly connected to the top of the baffle 7, and the top of the toggle plate 11 extends out of the top plate 4 and is hinged to one end of a toggle rod 12, and the other end of the toggle rod 12 is rotatably connected to the top plate 4 through a rotating shaft 13, and a gear 14 is fixedly connected to the rotating shaft 13, and the push plate 10 is located between two gears 14 on the same frame 5, and the two gears 14 are respectively meshed with the push plate 10.

[0036] In one embodiment of the present invention, referring to Figure 2 The electric telescopic rod 9 is used to push the push plate 10 to move. When the push plate 10 moves, the meshing gear 14 is driven to rotate, and then the toggle rod 12 can be controlled to rotate. The toggle rod 12 is a telescopic rod structure, which drives the hinged toggle plate 11 to move and push the baffle 7 out of the storage groove 6.

[0037] Specifically, the circular plate 4 is provided with a corresponding long hole (not shown in the figure) for moving the toggle plate 11 .

[0038] According to a further optimization scheme, a plurality of through holes 15 are provided at equal intervals in the axial direction on the baffle plate 7 , a slide groove 16 is provided on the inner wall of the through hole 15 , a sealing plate 18 is slidably connected in the slide groove 16 via a first spring 17 , and the sealing plate 18 is used to seal the through hole 15 .

[0039] In one embodiment of the present invention, referring to Figure 3 The through hole 15 is sealed by the first spring 17 and the sealing plate 18 , and the through hole 15 can be opened later by moving the sealing plate 18 .

[0040] A further optimized solution is that the mounting box 3 is adapted to the through hole 15, and the two mounting boxes 3 extend into the tubular structure from two opposite through holes 15 respectively to separate the soil. The mounting box 3 includes a top plate 31, a bottom plate 32 and two side plates 33, and the two side plates 33 are respectively fixedly connected to both sides between the top plate 31 and the bottom plate 32, and also includes a movable frame 34, which is detachably connected to the top plate 31 and the bottom plate 32 through a connecting piece, and the pressure box 1 is arranged in the movable frame 34.

[0041] In one embodiment of the present invention, referring to Figure 2 , Figure 3One end of the installation box 3 is an open end, and the installation boxes 3 are respectively inserted through the two through holes 15 on both sides. The two installation boxes 3 are docked in the soil layer to achieve soil separation. Then the installation box 3 is pulled out, a hole is dug in the soil, and the pressure box 1 is placed in the original position, and the installation box 3 is pulled out to achieve the burial of the pressure box 1 in the soil.

[0042] A further optimized solution is that the connecting part includes two vertical grooves 19 opened on the movable frame 34, and a sliding rod 20 is fixedly connected in the vertical groove 19. Both ends of the sliding rod 20 are slidably connected to sliders 21, and one end of the connecting rod 22 is fixedly connected to the slider 21. Connecting holes 23 are opened on the opposite sides of the top plate 31 and the bottom plate 32, and the other end of the connecting rod 22 penetrates the movable frame 34 and extends into the connecting hole 23.

[0043] In one embodiment of the present invention, referring to Figure 4 , Figure 5 The two sliders 21 move on the slide rod 20, and when moving, the connected connecting rod 22 is driven to extend into the connecting hole 23, so as to realize the connection between the moving frame 34 and the top plate 31 and the bottom plate 32, and vice versa, the moving frame 34 and the top plate 31 and the bottom plate 32 are disassembled.

[0044] Specifically, when the installation box 3 of the present application is in use, the two installation boxes 3 are inserted into the sampled soil through the through holes 15 on both sides. The entry end of the installation box 3 is an open interface. The two installation boxes 3 are docked to collect the internal soil into the installation box 3, and then the limit of the connecting rod 22 and the connecting hole 23 is released, and the two movable frames 34 are moved in one direction. A hole for placing the pressure box 1 is dug in the soil inside the movable frame 34 to place the pressure box 1, and then it is put back into the soil layer, and the installation box 3 is withdrawn so that the pressure box 1 is located in the soil layer, and then the soil layer is placed and pushed into the excavated hole, thereby realizing the burial of the pressure box 1 in the soil.

[0045] According to a further optimized solution, the stabilizing member includes a plurality of stabilizing rods 24 threadedly connected to the support frame 2, and the bottom ends of the stabilizing rods 24 are conical structures extending into the soil layer.

[0046] In one embodiment of the present invention, referring to Figure 1 The stabilizing rod 24 is provided to penetrate the device and insert it into the soil layer, thereby ensuring the stability of the device during drilling.

[0047] According to a further optimized solution, a handle 25 is fixedly connected to the slider 21 .

[0048] In one embodiment of the present invention, referring to Figure 4 , Figure 5 The handle 25 is provided to facilitate the use of the moving frame 34. Specifically, the handle 25 is pressed toward the middle by two fingers of one hand to make the two connecting rods 22 on both sides move out of the connecting holes 23 synchronously, thereby controlling the movement of the moving frame 34.

[0049] According to a further optimized solution, both ends of the slide rod 20 are sleeved with a second spring 26 , and both ends of the second spring 26 are fixedly connected to the inner wall of the vertical groove 19 and the slide block 21 , respectively.

[0050] In one embodiment of the present invention, referring to Figure 4 , Figure 5 The second spring 26 is provided to ensure a stable connection between the connecting rod 22 and the connecting hole 23.

[0051] To further optimize the solution, a lead-out hole 27 is provided on the movable frame 34 , and the lead-out hole 27 is adapted to the cable 28 on the pressure box 1 .

[0052] In one embodiment of the present invention, referring to Figure 5 The outlet hole 27 is used to allow the cable 28 on the pressure box 1 to pass through.

[0053] In the description of the present invention, it should be understood that the terms "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0054] The embodiments described above are only descriptions of the preferred modes of the present invention, and are not intended to limit the scope of the present invention. Without departing from the design spirit of the present invention, various modifications and improvements made to the technical solutions of the present invention by ordinary technicians in this field should all fall within the protection scope determined by the claims of the present invention.

Claims

1. A pressure cell assembly for testing geotechnical mechanical characteristics, comprising a pressure cell (1), characterized in that: Also includes: A drilling assembly, the drilling assembly comprising a support frame (2) and a drilling device body (29), the support frame (2) being connected to the ground via a stabilizing member, the drilling device body (29) being fixedly connected to the support frame (2), the drilling end of the drilling device body (29) being fixedly connected to a circular plate (4), the circular plate (4) being provided with a drilling member, the drilling member being used to drill a hole into the soil and collecting the drilled soil in the drilling member; The installation assembly comprises two installation boxes (3), the two installation boxes (3) respectively extending into the soil in the drilling member from opposite sides of the drilling member, and the two installation boxes (3) are both provided with connecting parts, and the pressure box (1) is placed in the installation box (3).

2. A pressure cell assembly for testing geotechnical mechanical characteristics according to claim 1, characterized in that: The drilling member comprises a plurality of frames (5) fixedly connected to the bottom end of the top plate (4) at equal intervals along the circumferential direction, receiving grooves (6) are provided on both sides of the frames (5), baffles (7) are slidably connected in the receiving grooves (6), adjacent two baffles (7) on two adjacent frames (5) are arranged in contact, the plurality of frames (5) and the receiving grooves (6) form a tubular structure, a driving member is provided on the top plate (4), and the plurality of baffles (7) are respectively connected to the driving member.

3. A pressure cell assembly for testing geotechnical characteristics according to claim 2, characterized in that: The driving member comprises a support frame (8) fixedly connected to the top plate (4); one end of a plurality of electric telescopic rods (9) are hingedly connected to the support frame (8) at equal intervals in the circumferential direction; the other end of the electric telescopic rod (9) is hingedly connected to a push plate (10); the push plate (10) is slidably connected to the top plate (4); a toggle plate (11) is fixedly connected to the top of the baffle (7); the top of the toggle plate (11) extends out of the top plate (4) and is hingedly connected to one end of a toggle rod (12); the other end of the toggle rod (12) is rotatably connected to the top plate (4) via a rotating shaft (13); a gear (14) is fixedly connected to the rotating shaft (13); the push plate (10) is located between two gears (14) on the same frame (5), and the two gears (14) are respectively meshed with the push plate (10).

4. A pressure cell assembly for testing geotechnical characteristics according to claim 3, characterized in that: The baffle plate (7) is provided with a plurality of through holes (15) at equal intervals in the axial direction, a slide groove (16) is provided on the inner wall of the through hole (15), a sealing plate (18) is slidably connected in the slide groove (16) via a first spring (17), and the sealing plate (18) is used to seal the through hole (15).

5. A pressure cell assembly for testing geotechnical mechanical characteristics according to claim 4, characterized in that: The installation box (3) is adapted to the through hole (15); the two installation boxes (3) extend into the tubular structure from two opposite through holes (15) for separating soil; the installation box (3) comprises a top plate (31), a bottom plate (32) and two side plates (33); the two side plates (33) are respectively fixedly connected to the top plate (31) and the bottom plate (32) on both sides; the installation box (3) also comprises a movable frame (34); the movable frame (34) is detachably connected to the top plate (31) and the bottom plate (32) via the connecting piece; the pressure box (1) is arranged in the movable frame (34).

6. A pressure cell assembly for testing geotechnical mechanical characteristics according to claim 5, characterized in that: The connecting member comprises two vertical grooves (19) formed on the movable frame (34), a sliding rod (20) being fixedly connected in the vertical grooves (19), both ends of the sliding rod (20) being slidably connected to sliders (21), one end of a connecting rod (22) being fixedly connected to the slider (21), a connecting hole (23) being formed on opposite sides of the top plate (31) and the bottom plate (32), the other end of the connecting rod (22) passing through the movable frame (34) and extending into the connecting hole (23).

7. The pressure cell assembly for testing geotechnical mechanical characteristics according to claim 1, characterized in that: The stabilizing member comprises a plurality of stabilizing rods (24) threadedly connected to the support frame (2); the bottom ends of the stabilizing rods (24) are conical structures extending into the soil layer.

8. The pressure cell assembly for testing geotechnical mechanical characteristics according to claim 2, characterized in that: A handle (25) is fixedly connected to the slider (21).

9. The pressure cell assembly for testing geotechnical mechanical characteristics according to claim 6, characterized in that: The two ends of the slide rod (20) are sleeved with a second spring (26), and the two ends of the second spring (26) are respectively fixedly connected to the inner wall of the vertical groove (19) and the slide block (21).

10. The pressure cell assembly for testing geotechnical mechanical characteristics according to claim 5, characterized in that: The movable frame (34) is provided with a lead-out hole (27), and the lead-out hole (27) is adapted to be matched with the cable (28) on the pressure box (1).

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