A soil sampling and grouting device for model test in geotechnical engineering

Abstract

The present invention belongs to the technical field of geotechnical engineering, and discloses a soil grouting device for model tests in geotechnical engineering, including a base; a column, which is arranged on the upper side of the base; a multifunctional power head, which is arranged on the side of the column; a first adjustment device, whose fixing part is arranged on the column, and is used to adjust the height of the multifunctional power head; a first rotating device, which is arranged on the moving part of the first adjustment device, and is used to realize the station interchange of the multifunctional power head; a second adjustment device, whose fixing part is connected to the side of the first rotating device away from the column, and whose moving part is connected to the multifunctional power head, and is used to adjust the lateral position of the multifunctional power head. Compared with the prior art, the present invention uses the multifunctional power head to compact the loose soil to form a hard structure soil, and then drills holes in the hard structure soil that meets the experimental conditions. The device reduces the human participation component, ensures the accuracy of the test results, and has a simple and reliable structure, which improves the test efficiency.

Description

Technical Field

[0001] The invention relates to the technical field of geotechnical engineering, and in particular to a soil sampling and grouting device used for model tests in geotechnical engineering. Background Art

[0002] With the rapid development of the economy, the requirements for the construction level of geotechnical engineering are increasing. In order to obtain more performance data to provide guidance for actual construction, it is often necessary to conduct repeated tests on various geotechnical models in the field of geotechnical engineering in the laboratory. In the pile foundation performance test, the conventional test is to first obtain hard test adobe manually, adjust its mechanical properties to be consistent with the soil properties of the test site, and then drill and grout, and then measure its performance after the slurry solidifies. However, under this operation mode, the test efficiency is low, and too much human participation will also affect the accuracy of the test results. Summary of the invention

[0003] The present invention provides a soil sampling and grouting device for model test in geotechnical engineering, so as to overcome the problems existing in the above-mentioned prior art.

[0004] The technical solution of the present invention is:

[0005] A soil sampling and grouting device for model testing in geotechnical engineering, comprising:

[0006] Base;

[0007] A column, arranged on the upper side of the base;

[0008] A multifunctional power head is arranged on the side of the column;

[0009] A first adjustment device, whose fixing part is arranged on the column, and is used to adjust the height of the multifunctional power head;

[0010] A first rotating device, arranged on the moving part of the first adjusting device, for realizing the station interchange of the multifunctional power head;

[0011] The second adjusting device has a fixed part connected to the side of the first rotating device away from the column, and a movable part connected to the multifunctional power head, and is used for adjusting the lateral position of the multifunctional power head.

[0012] Preferably, the multifunctional power head comprises a fixed frame fixed to the moving part of the second adjusting device, and the fixed frame is provided with a ramming assembly for compacting loose soil and a drill assembly for drilling holes in hard structure soil.

[0013] Preferably, the rammed earth assembly includes a first sleeve fixed to one end of the fixed frame, a pressure rod is inserted into the first sleeve, one end of the pressure rod is fixedly connected to the pressure block, the other end of the pressure rod is hinged to the open end of the U-shaped frame, the closed end of the U-shaped frame is hinged to one end of the first connecting rod, the other end of the first connecting rod is hinged to one end of the second connecting rod, the other end of the second connecting rod is sleeved and fixed on a rotating shaft, the rotating shaft is connected to the output shaft of the first motor after passing through the bracket, the first motor is fixed to one end of the bracket, and the other end of the bracket is fixedly connected to the first sleeve.

[0014] Preferably, the drill bit assembly includes a second motor arranged in the fixed frame, the output shaft of the second motor is connected to one end of the second sleeve, the other end of the second sleeve is detachably connected to one end of the first connecting head, the other end of the first connecting head is connected to one end of the drill barrel, and the other end of the drill barrel is provided with a plurality of teeth.

[0015] Preferably, it also includes a third motor arranged on the inner bottom surface of the drill barrel, the output shaft of the third motor is detachably connected to one end of the second connecting head, the other end of the second connecting head is connected to the drill bit, and the diameter of the drill bit is clearance-matched with the inner diameter of the drill barrel.

[0016] Preferably, it also includes a first through hole and a second through hole opened on the inner bottom surface of the drill barrel, one end of the first through hole extends to the inner cavity of the drill barrel, and the other end is connected to the outlet of the water pump, the water pump is arranged in an external water tank, one end of the second through hole extends to the inner cavity of the drill barrel, and the other end is connected to the inlet of the sewage pump, the water pump and the sewage pump are both electrically connected to the controller, and the controller is electrically connected to the power supply through the control switch.

[0017] Preferably, a second rotating device is provided between the base and the column for driving the column to realize circumferential rotation.

[0018] Compared with the prior art, the soil sampling and grouting device for model test in geotechnical engineering provided by the present invention has the following beneficial effects:

[0019] 1. The structure of the present invention is simple and reliable;

[0020] 2. The present invention reduces the human involvement, ensures the accuracy of the test results, improves the test efficiency, has strong practicality, and is worthy of popularization and use. BRIEF DESCRIPTION OF THE DRAWINGS

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

[0022] Figure 2 It is a schematic diagram of the local structure of the present invention Figure 1 ;

[0023] Figure 3 It is a schematic diagram of the local structure of the present invention Figure 2 . DETAILED DESCRIPTION

[0024] The following is combined with the attached drawings Figures 1 to 3 , a specific embodiment of the present invention is described in detail, but it should be understood that the protection scope of the present invention is not limited by the specific embodiment.

[0025] Example 1

[0026] like Figure 1 As shown, an embodiment of the present invention provides a soil sampling and grouting device for model tests in geotechnical engineering, the structure of which includes a base 1 used as a main body support, a column 3 is arranged on the upper side of the base 1, the column 3 is vertically arranged, and one end of the column 3 is fixed to the base 1.

[0027] A multifunctional power head is arranged on the side of the column 3, and the multifunctional power head is used to compact the loose soil to form a hard structural soil, and then to drill holes in the hard structural soil that meets the experimental conditions.

[0028] The column 3 is provided with a first adjusting device 4, which is used to adjust the height of the multifunctional power head. Figure 1 As shown, the column 3 is a hollow structure, the first adjustment device 4 is a ball screw structure, the screw is vertically inserted into the column 3 and is coaxially arranged with the column 3, the lower end of the screw is fixed with a first bearing, the first bearing is set in the groove on the top surface of the boss, and the bottom surface of the boss is fixed to the inner bottom surface of the column 3. The upper end of the screw is fixed with a second bearing, the second bearing is set in the through hole on the top surface of the column 3, one end of the screw extending out of the column 3 is connected to the output shaft of the fourth motor, the fourth motor is mounted on the top of the column 3, and the screw is set with a nut seat that can move up and down along the screw.

[0029] During use, when the fourth motor rotates, it can drive the lead screw to rotate synchronously, thereby synchronously driving the nut seat on the lead screw to move up and down, thereby achieving the purpose of adjusting the height of the multi-functional power head.

[0030] A slot is provided on the side wall of the column 3, and the nut seat extends outside after passing through the slot. A first rotating device 5 is provided on the nut seat of the first adjusting device 4, and the first rotating device 5 is used to realize the station interchange of the multifunctional power head.

[0031] Specifically, the first rotating device 5 can be selected as an electric dividing plate, which can achieve arbitrary division within the range of 0 to 360 degrees, has high division accuracy and good reliability, can be accurately positioned at the angle where it needs to stop, and realizes the station interchange of the multifunctional power head.

[0032] The side of the first rotating device 5 facing away from the column 3 is connected to the fixing part of the second adjusting device 6, the moving part of the second adjusting device 6 is connected to the multifunctional power head, and the second adjusting device 6 is used to adjust the lateral position of the multifunctional power head.

[0033] Specifically, the structure of the second adjustment device 6 can be preferably a hydraulic cylinder, wherein the cylinder body of the hydraulic cylinder is fixed to the first rotating device 5, and the end of the piston rod of the hydraulic cylinder is connected to the multifunctional power head. The lateral position of the multifunctional power head can be changed by extending or retracting the piston rod of the hydraulic cylinder.

[0034] Furthermore, the structure of the multifunctional power head includes a fixed frame 7 fixed to the moving part of the second adjustment device 6, and the fixed frame 7 is respectively provided with a ramming assembly 10 for compacting loose soil and a drill assembly 9 for drilling holes in hard structure soil.

[0035] More specifically, Figure 3 As shown, the structure of the rammed earth assembly 10 includes a first sleeve 1001 fixed to one end of the fixed frame 7, a pressure rod 1007 is inserted into the first sleeve 1001, one end of the pressure rod 1007 is fixedly connected to the pressure block 1008, the other end of the pressure rod 1007 is hinged to the open end of the U-shaped frame 1006, the closed end of the U-shaped frame 1006 is hinged to one end of the first connecting rod 1005, the other end of the first connecting rod 1005 is hinged to one end of the second connecting rod 1004, the other end of the second connecting rod 1004 is sleeved and fixed on the rotating shaft, the rotating shaft passes through the bracket 1002 and is connected to the output shaft of the first motor 1003, the first motor 1003 is fixed to one end of the bracket 1002, and the other end of the bracket 1002 is fixedly connected to the first sleeve 1001.

[0036] During use, after the first motor 1003 is started, it can drive the second connecting rod 1004 to rotate synchronously. The second connecting rod 1004 synchronously drives the first connecting rod 1005 and the pressure rod 1007 at the end of the first connecting rod 1005 to move up and down in the first sleeve 1001, driving the pressure block 1008 to act on the soil, thereby compacting the loose soil to form a hard structural soil.

[0037] More specifically, Figure 2 As shown, the structure of the drill bit assembly 9 includes a second motor arranged in a fixed frame 7, the output shaft of the second motor is connected to one end of a second sleeve 8, the other end of the second sleeve 8 is detachably connected to one end of a first connecting head 903 via a connecting thread, the other end of the first connecting head 903 is connected to one end of a drill barrel 901, and the other end of the drill barrel 901 is provided with a plurality of teeth 908.

[0038] When the second motor is started, it can drive the drill tube 901 to rotate synchronously, so that the multiple teeth 908 can be used to cut soil samples on the hard structure soil and eat the soil samples into the drill tube. After stopping, the drill tube 901 withdraws with the cut soil samples to form a test hole.

[0039] Example 2

[0040] Furthermore, as a further improvement scheme based on Example 1, in order to reduce the heating problem of the drill bit when cutting a hard rock structure, a third motor 905 is provided on the inner bottom surface of the drill tube 901. Figure 2 As shown, the output shaft of the third motor 905 is detachably connected to one end of the second connector 906 , and the other end of the second connector 906 is connected to the drill bit 907 , and the diameter of the drill bit 907 is in clearance with the inner diameter of the drill barrel 901 .

[0041] Further, such as Figure 2 As shown, it also includes a first through hole and a second through hole opened on the inner bottom surface of the drill barrel 901, one end of the first through hole extends to the inner cavity of the drill barrel 901, and the other end is connected to the outlet of the water pump, the water pump is arranged in an external water tank, one end of the second through hole extends to the inner cavity of the drill barrel 901, and the other end is connected to the inlet of the sewage pump, the water pump and the sewage pump are electrically connected to the controller, and the controller is electrically connected to the power supply through the control switch.

[0042] When in use, the third motor 905 is used to drive the second connecting head 906 and the drill bit 907 to rotate synchronously. While the drill barrel 901 is cutting, the drill bit 907 cuts the internal structure of the drill barrel 901. The controller starts the water pump and the sewage pump at the same time, so that water enters the first through hole through the water pump. After the drill bit 907 and the drill barrel 901 are cooled, the heated water and slurry flow out through the second through hole under the action of the sewage pump. This cycle is repeated, so that the heating problem of the drill bit 907 and the drill barrel 901 is alleviated.

[0043] Example 3

[0044] Furthermore, as a further improvement scheme based on Example 1, in order to facilitate the yielding operation or multi-station operation, a second rotating device 2 is provided between the base 1 and the column 3 for driving the column 3 to realize circumferential rotation.

[0045] Specifically, the second rotating device 2 can be selected as an electric dividing plate, which can achieve arbitrary division within the range of 0 to 360 degrees, has high division accuracy and good reliability, and can be accurately positioned at the angle where it needs to stop, facilitating yielding operations or multi-station operations.

[0046] Under the premise of only two working positions, the second rotating device 2 can also be preferably a steering gear, which can realize rotation and stopping within a predetermined angle range, which is economical and easy to control.

[0047] Compared with the prior art, the present invention provides a soil sampling and grouting device for model tests in geotechnical engineering, which utilizes a multifunctional power head to compact loose soil to form a hard structural soil, and then drills holes in the hard structural soil that meets the experimental conditions. The device reduces the human participation component, ensures the accuracy of the test results, and has a simple and reliable structure, improves the test efficiency, is highly practical, and is worthy of popularization and use.

[0048] The above disclosures are only several specific embodiments of the present invention. However, the embodiments of the present invention are not limited thereto. Any changes that can be conceived by those skilled in the art should fall within the protection scope of the present invention.

Claims

1. A soil sampling and grouting device for model testing in geotechnical engineering, characterized in that: include: Base (1); A column (3) arranged on the upper side of the base (1); A multifunctional power head, arranged on the side of the column (3); A first adjustment device (4), a fixing member of which is arranged on the column (3) and is used to adjust the height of the multifunctional power head; A first rotating device (5), arranged on the moving part of the first adjusting device (4), and used for realizing the interchange of working positions of the multifunctional power head; A second adjustment device (6), whose fixed part is connected to the side of the first rotating device (5) away from the column (3), and whose movable part is connected to the multifunctional power head, and is used to adjust the lateral position of the multifunctional power head; The multifunctional power head comprises a fixed frame (7) fixed to the moving part of the second adjustment device (6), and the fixed frame (7) is provided with a ramming assembly (10) for compacting loose soil and a drill assembly (9) for drilling holes in hard structure soil. The rammed earth assembly (10) comprises a first sleeve (1001) fixed to one end of the fixed frame (7), a pressure rod (1007) is inserted into the first sleeve (1001), one end of the pressure rod (1007) is fixedly connected to a pressure block (1008), the other end of the pressure rod (1007) is hinged to an open end of a U-shaped frame (1006), the closed end of the U-shaped frame (1006) is hinged to one end of a first connecting rod (1005), the other end of the first connecting rod (1005) is hinged to one end of a second connecting rod (1004), the other end of the second connecting rod (1004) is sleeved and fixed on a rotating shaft, the rotating shaft passes through a bracket (1002) and is connected to an output shaft of a first motor (1003), the first motor (1003) is fixed to one end of the bracket (1002), and the other end of the bracket (1002) is fixedly connected to the first sleeve (1001); The drill bit assembly (9) comprises a second motor arranged in the fixed frame (7), the output shaft of the second motor is connected to one end of a second sleeve (8), the other end of the second sleeve (8) is detachably connected to one end of a first connector (903), the other end of the first connector (903) is connected to one end of a drill barrel (901), and the other end of the drill barrel (901) is provided with a plurality of teeth (908).

2. A soil grouting device for model testing in geotechnical engineering as claimed in claim 1, characterized in that: It also includes a third motor (905) arranged on the inner bottom surface of the drill barrel (901), the output shaft of the third motor (905) being detachably connected to one end of a second connector (906), the other end of the second connector (906) being connected to a drill bit (907), and the diameter of the drill bit (907) being loosely matched with the inner diameter of the drill barrel (901).

3. A soil sampling and grouting device for model testing in geotechnical engineering as claimed in claim 2, characterized in that: It also includes a first through hole and a second through hole formed on the inner bottom surface of the drill barrel (901), one end of the first through hole extending into the inner cavity of the drill barrel (901), and the other end communicating with the outlet of a water pump; the water pump is arranged in an external water tank; one end of the second through hole extending into the inner cavity of the drill barrel (901), and the other end communicating with the inlet of a sewage pump; the water pump and the sewage pump are both electrically connected to a controller, and the controller is electrically connected to a power supply via a control switch.

4. A soil sampling and grouting device for model testing in geotechnical engineering as claimed in claim 1, characterized in that: A second rotating device (2) is provided between the base (1) and the column (3) for driving the column (3) to achieve circumferential rotation.

Images