Dynamic compaction simulation test device in high gravity field

Abstract

The utility model belongs to the field of centrifugal simulation tests in geotechnical engineering, and provides a dynamic compaction simulation test device in a hypergravity field, which comprises a box body, a three-dimensional positioning system and an automatic compaction system, the three-dimensional positioning system comprises an X-direction movement module, a Y-direction movement module and a Z-direction movement module, the X-direction movement module is installed on the box body, the Y-direction movement module is installed at the moving end of the X-direction movement module, and the Z-direction movement module is installed at the moving end of the Y-direction movement module. According to the device, a dynamic compaction simulation test of a super-gravity field can be carried out in a centrifugal machine through a model, a three-dimensional positioning system on the box body is used for accurately adjusting the compaction position, automatic falling and lifting of a compaction hammer are achieved through an automatic compaction system, automatic simulation of dynamic compaction construction under the conditions of different compaction positions and different compaction energy can be achieved, and the construction efficiency is improved. The test efficiency is greatly improved, and a reliable way is provided for verifying and optimizing the effect of a foundation treatment engineering project.

Description

Technical Field

[0001] The utility model belongs to the field of centrifugal simulation tests for geotechnical engineering, and in particular relates to a strong compaction simulation test device in a hypergravity field. Background Art

[0002] Dynamic consolidation method, also known as dynamic consolidation method, is to use lifting machinery to drop a heavy hammer of a certain mass from a high altitude to make it fall freely. The foundation soil is compacted by strong impact energy, the pores of the foundation soil are compressed, the shear resistance, compression characteristics and dynamic characteristics are improved, and the settlement and uneven settlement of the building can be controlled. Dynamic consolidation method has been widely used in engineering, but the theoretical research of dynamic consolidation method lags far behind engineering practice. The fundamental reason is that the on-site prototype test research is limited by the formation and construction conditions, the applicability of the corresponding research results is limited, and the similarity of the conventional indoor 1g test model is difficult to meet.

[0003] Centrifugal simulation test uses a high-speed rotating centrifuge to apply n times the centrifugal inertial force to a model with a scale of 1 / n, and truly reproduces the stress level on site in a hypergravity field, and makes the stress and strain of the model and the prototype equal, and the failure mechanism is the same. Therefore, centrifugal simulation test technology has been widely used in the field of geotechnical engineering research.

[0004] The dynamic compaction simulation device in the hypergravity field needs to realize the free fall of the tamping hammer, the precise positioning of the tamping point, the lifting and re-tamping of the tamping hammer, and at the same time, it needs to meet the requirements of different projects for the tamping energy by adjusting the tamping hammer mass and the tamping height. The existing device cannot meet the above requirements at the same time. Utility Model Content

[0005] In view of the deficiencies in the prior art, the utility model provides a device for simulating a dynamic compaction test in a hypergravity field, which can perform a dynamic compaction simulation test in a hypergravity field through a model in a centrifuge.

[0006] In order to achieve the above-mentioned purpose, the utility model adopts the following technical scheme: a strong compaction simulation test device in a hypergravity field, comprising a box, a three-dimensional positioning system, and an automatic compaction system;

[0007] The three-dimensional positioning system comprises an X-direction motion module, a Y-direction motion module and a Z-direction motion module, wherein the X-direction motion module is mounted on the box, the Y-direction motion module is mounted on the moving end of the X-direction motion module, and the Z-direction motion module is mounted on the moving end of the Y-direction motion module;

[0008] The automatic tamping system includes a variable diameter positioning rod, a card release joint and a tamping hammer, wherein the variable diameter positioning rod is vertically mounted on the moving end of the Y-direction motion module, the card release joint is provided with a first through hole running through the upper and lower parts, the variable diameter positioning rod is inserted into the first through hole, and the moving end of the Z-direction motion module is fixed to the card release joint through an L-shaped transmission rod;

[0009] The side walls on both sides of the release joint are provided with embedded grooves, the embedded grooves are communicated with the first through hole, and the embedded grooves are provided with toothed buckles, torsion springs, rollers, and through-axis shafts. The inner walls on both sides of the embedded grooves are provided with horizontal strip grooves, and the two ends of the through-axis shaft are respectively inserted in the strip grooves on both sides, and the rollers, the toothed buckles, and the torsion springs can be rotatably sleeved on the outside of the through-axis shaft, and the rollers are in rolling contact with the side walls of the variable diameter positioning rod, and the torsion springs are used to connect the inner walls of the embedded grooves and the toothed buckles, and the toothed buckles protrude from the embedded grooves at one end away from the variable diameter positioning rod, and the protruding length is equal to the length of the strip grooves, and the toothed buckles are provided with an inclined surface obliquely downward at one end away from the variable diameter positioning rod;

[0010] The ramming hammer comprises a ramming hammer fixing ring and a counterweight hammer, wherein the ramming hammer fixing ring is sleeved on the outside of the release joint, the ramming hammer fixing ring is overlapped on the inclined surfaces of the toothed buckles on both sides of the release joint, the counterweight hammer is fixedly connected to the ramming hammer fixing ring through a connecting rod, a second through hole is penetrated through the upper and lower parts of the counterweight hammer, and the variable diameter positioning rod is inserted into the second through hole;

[0011] The variable diameter positioning rod includes an upper section and a lower section. The diameter of the upper section is smaller than that of the lower section. The intersection of the upper section and the lower section is smoothly connected by an inclined surface. The radius difference between the upper section and the lower section is equal to the length of the strip groove.

[0012] Preferably, the lower section of the variable diameter positioning rod is composed of a plurality of short rods threadedly connected.

[0013] Preferably, the automatic ramming system also includes a ring connecting module, which is fixed on the top of the release joint and is sleeved on the outside of the variable diameter positioning rod. The moving end of the Z-axis motion module is fixed to the ring connecting module through the L-shaped transmission rod.

[0014] Preferably, the X-axis motion module includes an X-axis displacement motor, an X-axis transmission nut, an X-axis lead screw, an X-axis slide rail, and an X-axis transmission slider; the X-axis displacement motor and the X-axis slide rail are both mounted on the box; the X-axis lead screw is rotatably mounted on the box; the power output end of the X-axis displacement motor is coaxially fixed with the X-axis lead screw; the X-axis transmission nut is threadedly connected to the X-axis lead screw; the X-axis transmission slider is slidably matched with the X-axis slide rail; and the X-axis transmission nut is fixed to the X-axis transmission slider.

[0015] Preferably, the X-direction motion module comprises two X-direction slide rails and two X-direction transmission sliders, the two X-direction transmission sliders are respectively slidably matched with the two X-direction slide rails, and the two X-direction transmission sliders are connected and fixed by a connecting rod.

[0016] Preferably, the Y-axis motion module includes a Y-axis displacement motor, a Y-axis transmission nut, a Y-axis mobile platform, a Y-axis lead screw, and a Y-axis slide rail. The Y-axis displacement motor and the Y-axis slide rail are both installed on the X-axis transmission slider. The Y-axis lead screw is rotatably installed on the X-axis transmission slider. The power output end of the Y-axis displacement motor is coaxially fixed with the Y-axis lead screw. The Y-axis transmission nut is threadedly connected to the Y-axis lead screw. The Y-axis mobile platform is slidably matched with the Y-axis slide rail, and the Y-axis transmission nut is fixed to the Y-axis mobile platform.

[0017] Preferably, the Y-direction motion module includes two Y-direction slide rails, and the Y-direction moving platform is slidably matched with the two Y-direction slide rails at the same time.

[0018] Preferably, the Z-direction motion module is installed on the Y-direction moving platform, and the moving end of the Z-direction motion module passes downward through the Y-direction moving platform.

[0019] Preferably, transparent glass is provided on one side wall of the box body.

[0020] Preferably, the transparent glass is organic glass.

[0021] Compared with the prior art, the beneficial effects of the utility model are:

[0022] The utility model provides a dynamic compaction simulation test device in a hypergravity field, which can perform a dynamic compaction simulation test in a hypergravity field through a model in a centrifuge, utilize a three-dimensional positioning system on a box body to accurately adjust the tamping position of the tamping hammer, realize automatic dropping and lifting of the tamping hammer through an automatic tamping system, and realize adjustment of the tamping height and the mass of the tamping hammer through modular assembly of a variable-diameter positioning rod and the tamping hammer, thereby realizing automatic simulation of dynamic compaction construction under different tamping positions and tamping energies, greatly improving the test efficiency, and providing a reliable way to verify and optimize the effect of foundation treatment engineering projects. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 A schematic diagram of the three-dimensional structure of a dynamic compaction simulation test device in a hypergravity field provided by an embodiment of the utility model;

[0024] Figure 2 A schematic diagram of the three-dimensional structure of a dynamic compaction simulation test device in a hypergravity field provided by an embodiment of the utility model;

[0025] Figure 3 A schematic diagram of the front view of a dynamic compaction simulation test device in a hypergravity field provided by an embodiment of the utility model;

[0026] Figure 4 A schematic diagram of the side structure of a dynamic compaction simulation test device in a hypergravity field provided by an embodiment of the utility model;

[0027] Figure 5 for Figure 4 A schematic diagram of the enlarged structure at A in the middle;

[0028] Figure 6 A schematic diagram of the three-dimensional structure of a disengagement joint and related parts of a dynamic compaction simulation test device in a hypergravity field provided by an embodiment of the utility model;

[0029] Figure 7 A schematic diagram of the three-dimensional structure of a toothed buckle and related parts of a dynamic compaction simulation test device in a hypergravity field provided by an embodiment of the utility model;

[0030] Figure 8 A schematic diagram of the top view of a disengagement joint of a dynamic compaction simulation test device in a hypergravity field provided by an embodiment of the utility model;

[0031] Fig. 9 A schematic diagram of the three-dimensional structure of a torsion spring of a dynamic compaction simulation test device in a hypergravity field provided in an embodiment of the utility model.

[0032] In the accompanying drawings, the components represented by the reference numerals are listed as follows:

[0033] 1. Box body; 1-1. Transparent glass;

[0034] 2-1, X-axis motion module;

[0035] 2-1-1, X-axis displacement motor; 2-1-3, X-axis transmission nut; 2-1-4, X-axis lead screw; 2-1-6, X-axis slide rail;

[0036] 2-2, Y-axis motion module;

[0037] 2-2-1, Y-axis displacement motor; 2-2-2, Y-axis transmission nut; 2-2-3, Y-axis moving platform; 2-2-4, Y-axis lead screw; 2-2-6, Y-axis slide rail;

[0038] 2-3. Z-axis motion module;

[0039] 3-1, variable diameter positioning rod;

[0040] 3-2, card release connector; 3-2-1, ring connection module;

[0041] 3-2-21, toothed buckle; 3-2-22, torsion spring; 3-2-23, roller; 3-2-24, through-shaft;

[0042] 3-3, tamping hammer;

[0043] 3-3-1, ramming hammer fixing ring; 3-3-2, counterweight hammer; 3-3-3, connecting rod;

[0044] 3-4. L-shaped transmission rod. DETAILED DESCRIPTION

[0045] The present invention will be further described in detail below in conjunction with specific embodiments so that those skilled in the art can understand the present invention more clearly.

[0046] It should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected" and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integrally formed structure. For ordinary technicians in this field, the specific meanings of such terms in this patent can be understood according to specific circumstances.

[0047] This embodiment provides a device for simulating a strong compaction test in a hypergravity field, comprising a box 1, a three-dimensional positioning system, and an automatic compaction system. The box 1 is made of a high-strength aluminum alloy material, and its inner dimensions are 850 mm×640 mm×870 mm.

[0048] like Figure 1-2As shown, the three-dimensional positioning system includes an X-axis motion module 2-1, a Y-axis motion module 2-2, and a Z-axis motion module 2-3. The X-axis motion module 2-1 is installed on the box 1, the Y-axis motion module 2-2 is installed on the mobile end of the X-axis motion module 2-1, and the Z-axis motion module 2-3 is installed on the mobile end of the Y-axis motion module 2-2.

[0049] Based on the above structure, the X-direction motion module 2-1 can drive the Y-direction motion module 2-2 to move freely along the X direction, and then the Y-direction motion module 2-2 can drive the Z-direction motion module 2-3 to move freely along the Y direction.

[0050] like Figure 3-4 As shown, the automatic ramming system includes a variable diameter positioning rod 3-1, a disengaging joint 3-2 and a ramming hammer 3-3. The variable diameter positioning rod 3-1 is vertically installed on the moving end of the Y-axis motion module 2-2. The disengaging joint 3-2 is penetrated by a first through hole from top to bottom. The variable diameter positioning rod 3-1 is inserted into the first through hole. The moving end of the Z-axis motion module 2-3 is fixed to the disengaging joint 3-2 by an L-shaped transmission rod 3-4.

[0051] Among them, the Z direction is vertical, and the Z-direction motion module 2-3 can be an automatic lifting device. The moving end of the Z-direction motion module 2-3 can move freely in the vertical direction, and then can drive the de-carding joint 3-2 to move freely in the vertical direction. In other words, through the Z-direction motion module 2-3, the de-carding joint 3-2 can be driven to slide up and down along the variable diameter positioning rod 3-1. Combined with the X-direction motion module 2-1 and the Y-direction motion module 2-2, the free movement of the de-carding joint 3-2 in three-dimensional space can be realized.

[0052] like Figure 5-8 As shown, the side walls of the release connector 3-2 are provided with embedded grooves, the embedded grooves are connected with the first through hole, the embedded grooves are provided with toothed buckles 3-2-21, torsion springs 3-2-22, rollers 3-2-23, and through-axis 3-2-24, the inner walls of the embedded grooves are provided with horizontal strip grooves, and the two ends of the through-axis 3-2-24 are respectively inserted into the strip grooves on both sides. The strip grooves are arranged along the direction of approaching or moving away from the first through hole, that is, the inner end of the strip groove is closest to the first through hole, and the outer end of the strip groove is farthest from the first through hole, so that when the through-axis 3-2-24 moves along the strip groove, it will gradually approach or move away from the first through hole.

[0053] The roller 3-2-23, the toothed buckle 3-2-21 and the torsion spring 3-2-22 can be rotatably mounted on the outside of the through-axis 3-2-24. The roller 3-2-23 is in rolling contact with the side wall of the variable diameter positioning rod 3-1. When the disengaging joint 3-2 slides up and down along the variable diameter positioning rod 3-1, the roller 3-2-23 rolls up and down along the side wall of the variable diameter positioning rod 3-1.

[0054] The torsion spring 3-2-22 is sleeved on the outside of the through-axis 3-2-24, and the two ends of the torsion spring 3-2-22 are respectively connected to the inner wall of the embedded groove and the toothed buckle 3-2-21. It should be noted that when the through-axis 3-2-24 is located at the outer end of the strip groove, the torsion spring 3-2-22 is in a natural state. When the toothed buckle 3-2-21 is subjected to an external force and swings around the through-axis 3-2-24, or when the toothed buckle 3-2-21 is subjected to an external force and moves horizontally along the strip groove, the kinetic energy will be converted into the elastic potential energy of the torsion spring 3-2-22, and when the external force is eliminated, the elastic potential energy will be converted into kinetic energy again.

[0055] The toothed buckle 3-2-21 protrudes out of the embedded groove away from one end of the variable diameter positioning rod 3-1, and the protruding length is equal to the length of the strip groove. It should be noted that when the through-axis 3-2-24 is located at the inner end of the strip groove, the toothed buckle 3-2-21 does not protrude out of the embedded groove at this time, and when the through-axis 3-2-24 is located at the outer end of the strip groove, the toothed buckle 3-2-21 protrudes out of the embedded groove at this time, and the protruding length is equal to the length of the strip groove. Based on this, when the part of the toothed buckle 3-2-21 protruding out of the embedded groove is squeezed by external force, the through-axis 3-2-24 can be pushed to move inward along the strip groove until the protruding part of the toothed buckle 3-2-21 is completely retracted into the embedded groove, and at this time the through-axis 3-2-24 just moves to the inner end of the strip groove.

[0056] like Figure 5 As shown, the toothed buckle 3-2-21 is provided with an inclined surface obliquely downward at one end away from the variable diameter positioning rod 3-1. The ramming hammer 3-3 includes a ramming hammer fixing ring 3-3-1 and a counterweight hammer 3-3-2. The ramming hammer fixing ring 3-3-1 is sleeved on the outside of the de-clamping joint 3-2. The ramming hammer fixing ring 3-3-1 is overlapped on the inclined surfaces of the toothed buckles 3-2-21 on both sides of the de-clamping joint 3-2. The counterweight hammer 3-3-2 is fixedly connected to the ramming hammer fixing ring 3-3-1 through a connecting rod 3-3-3. A second through hole is penetrated from top to bottom of the counterweight hammer 3-3-2, and the variable diameter positioning rod 3-1 is inserted into the second through hole.

[0057] Due to the gravity of the ramming hammer fixing ring 3-3-1, an inward squeezing force is generated on the inclined surface of the toothed buckle 3-2-21, so that the toothed buckle 3-2-21 can move inward.

[0058] The variable diameter positioning rod 3-1 includes an upper section and a lower section, the diameter of the upper section is smaller than that of the lower section, the upper section and the lower section are smoothly connected at the intersection through an inclined surface, and the radius difference between the upper section and the lower section is equal to the length of the strip groove. It should be noted that when the disengaging joint 3-2 is located in the lower section, and the roller 3-2-23 is in rolling contact with the side wall of the lower section, the through-axis 3-2-24 is just located at the outer end of the strip groove, and the toothed buckle 3-2-21 protrudes from the embedded groove. When the disengaging joint 3-2 is located in the upper section, and the roller 3-2-23 is in rolling contact with the side wall of the upper section, the through-axis 3-2-24 is located at the inner end of the strip groove, and the toothed buckle 3-2-21 does not protrude from the embedded groove. Based on this, when the disengagement joint 3-2 moves from the lower section to the upper section, due to the smaller radius of the upper section, the roller 3-2-23 will be separated from the variable diameter positioning rod 3-1. At this time, there is a certain space on the inner side of the roller 3-2-23, and at the same time, there is a certain space on the inner side of the through-shaft 3-2-24. When gravity (the gravity of the ramming hammer fixing ring 3-3-1) acts on the inclined surface of the toothed buckle 3-2-21, an inward extrusion force will be generated, pushing the toothed buckle 3-2-21 inward until the toothed buckle 3-2-21 does not protrude from the embedded groove. At this time, the ramming hammer fixing ring 3-3-1 will be separated from the toothed buckle 3-2-21 and automatically fall due to the action of gravity.

[0059] In summary, the working principle of the dynamic compaction simulation test device provided in this embodiment is as follows: in the supergravity dynamic compaction simulation test, the foundation model is first prepared in the box 1, and the appropriate counterweight hammer 3-3-2 and variable diameter positioning rod 3-1 are determined according to the mass of the tamping hammer and the tamping height required for the test. Then the whole set of dynamic compaction simulation test device is hoisted into the hanging basket of the geotechnical centrifuge. By setting the control parameters of the three-dimensional positioning system, the tamping hammer reaches the initial tamping point position, and the unstuck joint 3-2 and the tamping hammer 3-3 are located at the lower section of the variable diameter positioning rod 3-1.

[0060] Start the geotechnical centrifuge, and start the strong tamping simulation operation after the acceleration reaches the predetermined acceleration and stabilizes. Operate the Z-axis motion module 2-3 to drive the disengagement joint 3-2 to move upward through the L-shaped transmission rod 3-4. When the roller 3-2-23 rolls to the variable diameter position, the tamping hammer 3-3 will squeeze and push the toothed buckle 3-2-21 inward under its own weight, driving the through-shaft 3-2-24 to move inward. When the roller 3-2-23 reaches the upper section, the tamping hammer 3-3 crosses the toothed buckle 3-2-21 under its own weight, and begins to fall freely along the variable diameter positioning rod 3-1 and tamping the foundation soil. After the disengagement joint 3-2 moves to the upper section, it stops moving upward, completing the first tamping of the single point.

[0061] After the first tamping is completed, the Z-direction motion module 2-3 drives the disengagement joint 3-2 to move downward along the variable diameter positioning rod 3-1 through the L-shaped transmission rod 3-4, and moves to the upper surface of the tamping hammer fixing ring 3-3-1, and continues to move downward. At this time, the toothed buckle 3-2-21 is subjected to resistance, and overcomes the elastic force of the torsion spring 3-2-22 to swing upward and shrink into the embedded groove, and passes through the tamping hammer fixing ring 3-3-1. After the toothed buckle 3-2-21 moves to the lower surface of the tamping hammer fixing ring 3-3-1, it swings downward under the elastic force of the torsion spring 3-2-22 to reset and pop out, and the tamping hammer 3-3 is fixed. Afterwards, the Z-direction motion module 2-3 drives the disengagement joint 3-2 and the tamping hammer 3-3 to move upward along the variable diameter positioning rod 3-1 through the L-shaped transmission rod 3-4. When the disengagement joint 3-2 and the tamping hammer 3-3 pass through the variable diameter position of the variable diameter positioning rod 3-1 again, the disengagement joint 3-2 and the tamping hammer 3-3 are disengaged again, completing the secondary tamping. Such a cyclic operation realizes multiple single-point tamping. After the single-point tamping is completed, the automatic tamping system is made to reach the subsequent tamping point by operating the three-dimensional positioning system to complete the strong tamping simulation test of other tamping points.

[0062] The dynamic compaction simulation test device provided in this embodiment can control different compaction points by using the compaction positioning system, and can also control different compaction energies by changing the weight of the compaction hammer 3-3 and the length of the variable diameter positioning rod 3-1. In the hypergravity field, the dynamic compaction simulation indoor test can be well implemented. It should be emphasized that the relevant specifications and test procedures should be strictly followed when conducting the test.

[0063] In this embodiment, the lower section of the variable diameter positioning rod 3-1 is composed of a plurality of short rods threadedly connected. By changing the number of short rods, the length of the lower section can be changed, and the tamping height can be adjusted.

[0064] Please refer again Figure 3In this embodiment, the automatic ramming system also includes a circular connection module 3-2-1, which is fixed on the top of the release joint 3-2, and is sleeved on the outside of the variable diameter positioning rod 3-1. The moving end of the Z-direction motion module 2-3 is fixed to the circular connection module 3-2-1 through the L-shaped transmission rod 3-4.

[0065] The setting of the annular connection module 3-2-1 can avoid interference between the L-shaped transmission rod 3-4 and the ramming hammer 3-3.

[0066] Please refer again Figure 2 In this embodiment, the X-axis motion module 2-1 can include an X-axis displacement motor 2-1-1, an X-axis transmission nut 2-1-3, an X-axis lead screw 2-1-4, an X-axis slide rail 2-1-6, and an X-axis transmission slider. The X-axis displacement motor 2-1-1 and the X-axis slide rail 2-1-6 are both installed on the box body 1, and the X-axis lead screw 2-1-4 can be rotatably installed on the box body 1. The power output end of the X-axis displacement motor 2-1-1 is coaxially fixed with the X-axis lead screw 2-1-4, the X-axis transmission nut 2-1-3 is threadedly connected to the X-axis lead screw 2-1-4, the X-axis transmission slider is slidably matched with the X-axis slide rail 2-1-6, the X-axis transmission nut 2-1-3 is fixed to the X-axis transmission slider, and the X-axis lead screw 2-1-4 is parallel to the X-axis slide rail 2-1-6.

[0067] Among them, the X-direction motion module 2-1 includes two X-direction slide rails 2-1-6 and two X-direction transmission sliders. The two X-direction transmission sliders are respectively slidably matched with the two X-direction slide rails 2-1-6. The two X-direction transmission sliders are connected and fixed by connecting rods, and the structure is more stable.

[0068] The X-axis displacement motor 2-1-1 can drive the X-axis screw rod 2-1-4 to rotate, thereby driving the X-axis transmission nut 2-1-3 to move axially along the X-axis screw rod 2-1-4, thereby driving the X-axis transmission slider to move along the X-axis slide rail 2-1-6, and thereby driving the Y-axis motion module 2-2 to move along the X direction.

[0069] Please refer again Figure 2In this embodiment, the Y-axis motion module 2-2 includes a Y-axis displacement motor 2-2-1, a Y-axis transmission nut 2-2-2, a Y-axis moving platform 2-2-3, a Y-axis lead screw 2-2-4, and a Y-axis slide rail 2-2-6. The Y-axis displacement motor 2-2-1 and the Y-axis slide rail 2-2-6 are both mounted on the X-axis transmission slider. The Y-axis lead screw 2-2-4 can be rotatably mounted on the X-axis transmission slider. The power output end of the Y-axis displacement motor 2-2-1 is coaxially fixed with the Y-axis lead screw 2-2-4. The Y-axis transmission nut 2-2-2 is screwed with the Y-axis lead screw 2-2-4. The Y-axis moving platform 2-2-3 is slidably matched with the Y-axis slide rail 2-2-6. The Y-axis transmission nut 2-2-2 is fixed to the Y-axis moving platform 2-2-3. The Y-axis lead screw 2-2-4 is parallel to the Y-axis slide rail 2-2-6.

[0070] The Y-direction motion module 2-2 includes two Y-direction slide rails 2-2-6, and the Y-direction moving platform 2-2-3 slides with the two Y-direction slide rails 2-2-6 at the same time, so the structure is more stable.

[0071] The Y-axis displacement motor 2-2-1 can drive the Y-axis screw rod 2-2-4 to rotate, thereby driving the Y-axis transmission nut 2-2-2 to move axially along the Y-axis screw rod 2-2-4, thereby driving the Y-axis moving platform 2-2-3 to move along the Y-axis slide rail 2-2-6, and thereby driving the Z-axis motion module 2-3 to move along the Y direction.

[0072] The Z-direction motion module 2-3 is mounted on the Y-direction moving platform 2-2-3, and the moving end of the Z-direction motion module 2-3 passes through the Y-direction moving platform 2-2-3 downward. In other words, the moving end of the Z-direction motion module 2-3 can move freely under the Y-direction moving platform 2-2-3.

[0073] Please refer again Figure 1 In this embodiment, a transparent glass 1-1 is provided on one side wall of the box body 1. The transparent glass 1-1 is organic glass. In this way, in the centrifugal model experiment, the dynamic compaction simulation test process can be observed and recorded through the organic glass.

[0074] The mechanisms, components and parts not specifically described in the present invention are all existing structures in the prior art and can be directly purchased from the market.

[0075] In the description of the present utility model, it should be understood that the terms "upper", "lower", "left", "right", 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 utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, and a specific direction structure and operation, and therefore, cannot be understood as a limitation on the present utility model. In addition, "first" and "second" are only for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present utility model, unless otherwise specified, "multiple" means two or more.

[0076] The above is only a preferred embodiment of the utility model, and is not intended to limit the protection scope of the utility model. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A dynamic compaction simulation test device in a hypergravity field, characterized in that: It comprises a box (1), a three-dimensional positioning system, and an automatic tamping system; The three-dimensional positioning system comprises an X-direction motion module (2-1), a Y-direction motion module (2-2), and a Z-direction motion module (2-3), wherein the X-direction motion module (2-1) is mounted on the box (1), the Y-direction motion module (2-2) is mounted on the moving end of the X-direction motion module (2-1), and the Z-direction motion module (2-3) is mounted on the moving end of the Y-direction motion module (2-2); The automatic tamping system comprises a variable diameter positioning rod (3-1), a disengaging joint (3-2) and a tamping hammer (3-3); the variable diameter positioning rod (3-1) is vertically mounted on the moving end of the Y-direction motion module (2-2); the disengaging joint (3-2) is provided with a first through hole running through the upper and lower parts; the variable diameter positioning rod (3-1) is inserted into the first through hole; and the moving end of the Z-direction motion module (2-3) is fixed to the disengaging joint (3-2) via an L-shaped transmission rod (3-4); The side walls on both sides of the release joint (3-2) are provided with embedded grooves, the embedded grooves are connected to the first through hole, the embedded grooves are provided with toothed buckles (3-2-21), torsion springs (3-2-22), rollers (3-2-23), and through-axis (3-2-24), the inner walls on both sides of the embedded grooves are provided with horizontal strip grooves, the two ends of the through-axis (3-2-24) are respectively inserted into the strip grooves on both sides, the rollers (3-2-23), the toothed buckles (3-2-21), and the torsion springs (3-2-22) are all The rotating sleeve is arranged on the outside of the through-core shaft (3-2-24), the roller (3-2-23) is in rolling contact with the side wall of the variable diameter positioning rod (3-1), the torsion spring (3-2-22) is used to connect the inner wall of the embedded groove and the toothed buckle (3-2-21), the toothed buckle (3-2-21) protrudes out of the embedded groove at one end away from the variable diameter positioning rod (3-1), and the protruding length is equal to the length of the strip groove, and the toothed buckle (3-2-21) is provided with an inclined surface obliquely facing downward at one end away from the variable diameter positioning rod (3-1); The ramming hammer (3-3) comprises a ramming hammer fixing ring (3-3-1) and a counterweight hammer (3-3-2); the ramming hammer fixing ring (3-3-1) is sleeved on the outside of the release joint (3-2); the ramming hammer fixing ring (3-3-1) is overlapped on the inclined surfaces of the toothed buckles (3-2-21) on both sides of the release joint (3-2); the counterweight hammer (3-3-2) is fixedly connected to the ramming hammer fixing ring (3-3-1) via a connecting rod (3-3-3); a second through hole is penetrated from top to bottom of the counterweight hammer (3-3-2); the variable diameter positioning rod (3-1) is inserted into the second through hole; The variable diameter positioning rod (3-1) comprises an upper section and a lower section, the diameter of the upper section is smaller than that of the lower section, the intersection of the upper section and the lower section is smoothly connected via an inclined surface, and the radius difference between the upper section and the lower section is equal to the length of the strip groove.

2. The device for simulating a strong compaction test in a hypergravity field according to claim 1, characterized in that: The lower section of the variable diameter positioning rod (3-1) is composed of a plurality of short rods connected by threads.

3. The device for simulating a strong compaction test in a hypergravity field according to claim 1, characterized in that: The automatic tamping system also includes a circular connection module (3-2-1), the circular connection module (3-2-1) is fixed to the top of the release joint (3-2), the circular connection module (3-2-1) is sleeved on the outside of the variable diameter positioning rod (3-1), and the moving end of the Z-direction motion module (2-3) is fixed to the circular connection module (3-2-1) via the L-shaped transmission rod (3-4).

4. The device for simulating a strong compaction test in a hypergravity field according to claim 1, characterized in that: The X-direction motion module (2-1) comprises an X-direction displacement motor (2-1-1), an X-direction transmission nut (2-1-3), an X-direction lead screw (2-1-4), an X-direction slide rail (2-1-6), and an X-direction transmission slider. The X-direction displacement motor (2-1-1) and the X-direction slide rail (2-1-6) are both mounted on the box body (1); the X-direction lead screw (2-1-4) is rotatably mounted on the box body (1); the power output end of the X-direction displacement motor (2-1-1) is coaxially fixed with the X-direction lead screw (2-1-4); the X-direction transmission nut (2-1-3) is threadedly connected with the X-direction lead screw (2-1-4); the X-direction transmission slider is slidably matched with the X-direction slide rail (2-1-6); and the X-direction transmission nut (2-1-3) is fixed to the X-direction transmission slider.

5. The device for simulating a strong compaction test in a hypergravity field according to claim 4, characterized in that: The X-direction motion module (2-1) comprises two X-direction slide rails (2-1-6) and two X-direction transmission slide blocks. The two X-direction transmission slide blocks are respectively slidably matched with the two X-direction slide rails (2-1-6). The two X-direction transmission slide blocks are connected and fixed by a connecting rod.

6. The device for simulating a strong compaction test in a hypergravity field according to claim 4, characterized in that: The Y-direction motion module (2-2) comprises a Y-direction displacement motor (2-2-1), a Y-direction transmission nut (2-2-2), a Y-direction moving platform (2-2-3), a Y-direction lead screw (2-2-4), and a Y-direction slide rail (2-2-6); the Y-direction displacement motor (2-2-1) and the Y-direction slide rail (2-2-6) are both mounted on the X-direction transmission slider; the Y-direction lead screw (2-2-4) is rotatably mounted on the X-direction transmission slider; the power output end of the Y-direction displacement motor (2-2-1) is coaxially fixed with the Y-direction lead screw (2-2-4); the Y-direction transmission nut (2-2-2) is threadedly connected with the Y-direction lead screw (2-2-4); the Y-direction moving platform (2-2-3) is slidably matched with the Y-direction slide rail (2-2-6); and the Y-direction transmission nut (2-2-2) is fixed to the Y-direction moving platform (2-2-3).

7. The device for simulating a strong compaction test in a hypergravity field according to claim 6, characterized in that: The Y-direction motion module (2-2) comprises two Y-direction slide rails (2-2-6), and the Y-direction moving platform (2-2-3) is slidably matched with the two Y-direction slide rails (2-2-6) at the same time.

8. The device for simulating a strong compaction test in a hypergravity field according to claim 6, characterized in that: The Z-direction motion module (2-3) is installed on the Y-direction moving platform (2-2-3), and the moving end of the Z-direction motion module (2-3) passes through the Y-direction moving platform (2-2-3) downwards.

9. The device for simulating a strong compaction test in a hypergravity field according to claim 1, characterized in that: A transparent glass (1-1) is provided on a side wall of one side of the box body (1).

10. The device for simulating a strong compaction test in a hypergravity field according to claim 9, characterized in that: The transparent glass (1-1) is organic glass.

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