CN220666301U - Vibration liquefaction model test device - Google Patents
Vibration liquefaction model test device Download PDFInfo
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- CN220666301U CN220666301U CN202322102718.9U CN202322102718U CN220666301U CN 220666301 U CN220666301 U CN 220666301U CN 202322102718 U CN202322102718 U CN 202322102718U CN 220666301 U CN220666301 U CN 220666301U
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- 238000012360 testing method Methods 0.000 title claims abstract description 38
- 230000005540 biological transmission Effects 0.000 claims description 10
- 238000013016 damping Methods 0.000 claims description 2
- 230000003028 elevating effect Effects 0.000 claims 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 24
- 238000002347 injection Methods 0.000 abstract description 3
- 239000007924 injection Substances 0.000 abstract description 3
- 238000009434 installation Methods 0.000 description 23
- 239000004576 sand Substances 0.000 description 18
- 239000002689 soil Substances 0.000 description 14
- 239000011148 porous material Substances 0.000 description 5
- 239000000243 solution Substances 0.000 description 5
- 230000009471 action Effects 0.000 description 4
- 239000007788 liquid Substances 0.000 description 3
- 239000002245 particle Substances 0.000 description 3
- 239000000843 powder Substances 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000011160 research Methods 0.000 description 2
- 229920006395 saturated elastomer Polymers 0.000 description 2
- 238000004088 simulation Methods 0.000 description 2
- 230000001133 acceleration Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000009933 burial Methods 0.000 description 1
- 238000007596 consolidation process Methods 0.000 description 1
- 230000008094 contradictory effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000000280 densification Methods 0.000 description 1
- 229920001971 elastomer Polymers 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
Landscapes
- Investigation Of Foundation Soil And Reinforcement Of Foundation Soil By Compacting Or Drainage (AREA)
Abstract
The utility model relates to the technical field of saturated sand vibration liquefaction test equipment, in particular to a vibration liquefaction model test device which comprises a cylinder body, a lifting device arranged on the cylinder body and a vibration device arranged on the lifting device, wherein the vibration device comprises a driving motor and a vibration rod, the driving motor drives the vibration rod to vibrate, the lifting device can control the vibration rod to move up and down in the cylinder body, a feed door is arranged on the side edge of the cylinder body, a water stop belt is arranged at the joint of the feed door and the cylinder body to prevent the cylinder body from water seepage outwards after water injection.
Description
Technical Field
The utility model relates to the technical field of saturated sand vibration liquefaction test equipment, in particular to a vibration liquefaction model test device.
Background
The saturated sand layer is a common weak bad stratum, is common in projects such as underground comprehensive pipe racks, subways, tunnels and the like, has loose structure and poor self-stability, is easy to suddenly deform so as to induce accidents, and has the advantages that the vibration force is dispersed, the vibration frequency cannot be adjusted, and the influence of the vibration action of different vibration frequency research centers on the liquefaction of sand with different burial depths cannot be obtained for the liquefaction research of the saturated sand layer in the prior art; after the saturated sand layer is affected by vibration, pore water pressure in the soil body suddenly rises, so that stress among soil particles is reduced to zero, the soil body is in a nearly liquid state, sand can be liquefied under the action of earthquake load and becomes like fluid, the shear strength and bearing capacity are lost, so that accidents are induced, the sand liquefaction refers to the phenomenon that the saturated loose powder and fine sand are suddenly destroyed under the action of vibration to be in a liquid state, and the sand is changed from a solid state to a liquid state due to the rising of pore water pressure and the reduction of effective stress. The mechanism is that saturated loose powder and fine sand soil body have the tendency of movement and densification of particles under the action of vibration, the stress bearing is changed from a sand framework to water, the pore water pressure can be increased sharply due to poor seepage force of the powder and the fine sand, when the pore water pressure is large to the total stress value, the effective stress is reduced to zero, the particles are suspended in the water, and the sand body is liquefied.
Disclosure of Invention
Aiming at the defects in the prior art, the utility model provides a vibration liquefaction model test device.
In order to achieve the above object, the present utility model provides a vibration liquefaction model test apparatus, comprising: the cylinder body is arranged on a lifting device on the cylinder body and a vibrating device on the lifting device, the vibrating device comprises a driving motor and a vibrating rod, the driving motor drives the vibrating rod to vibrate, the lifting device drives the vibrating rod to move up and down in the cylinder body, a feeding door is arranged on the side edge of the cylinder body, and a water stop is arranged at the joint of the feeding door and the cylinder body.
In an alternative embodiment, in the vibration liquefaction model test device provided by the utility model, the vibration device further comprises a mounting component and a vibration component, the driving motor is arranged at the top of the mounting component, the bottom of the mounting component is connected with the vibration component, and a transmission shaft of the driving motor penetrates through the mounting component and stretches into the vibration component to provide a vibration source.
In an optional embodiment, in the vibration liquefaction model test device provided by the utility model, the installation component comprises a first installation frame, a second installation frame and a supporting rod for connecting the first installation frame and the second installation frame, the diameter of the first installation frame is larger than that of the second installation frame, the driving motor is installed on the first installation frame, a through hole for the transmission shaft of the driving motor to pass through is formed in the center position of the first installation frame, and the bottom of the second installation frame is connected with the vibration component.
In an alternative embodiment, in the vibration liquefaction model test device provided by the utility model, a damping piece is arranged on the vibration rod, the top end of the vibration rod is connected with the second mounting frame, and the transmission shaft of the driving motor extends into the vibration rod.
In an optional embodiment, in the vibration liquefaction model test device provided by the utility model, the lifting device comprises a fixed bracket and a lifting bracket, wherein the fixed bracket is arranged at the top of the cylinder body, the lifting bracket is in sliding connection with the fixed bracket, and the first mounting frame is mounted on the lifting bracket.
In an alternative embodiment, in the vibration liquefaction model test device provided by the utility model, pulleys are arranged on two outer sides of the lifting support, sliding grooves matched with the pulleys are arranged on two inner sides of the fixing support, and the lifting support slides in the sliding grooves through the pulleys.
In an alternative embodiment, in the vibration liquefaction model test device provided by the utility model, the lifting device further comprises a winch, the winch is arranged on the fixed support, a fixed pulley is arranged at the top end of the fixed support, the winch is connected with the lifting support through a winch rope bypassing the fixed pulley, and the winch rotates to drive the lifting support to slide in the fixed support.
In an alternative embodiment, in the vibration liquefaction model test device provided by the utility model, the driving motor is connected with a variable frequency controller.
Compared with the prior art, the technical scheme of the utility model has the beneficial effects that: according to the vibration liquefaction model test device, the cylinder body is arranged, the lifting device is arranged on the cylinder body, the vibration device is arranged on the lifting device and comprises the driving motor and the vibration rod, the driving motor drives the vibration rod to vibrate, the lifting device can control the vibration rod to move up and down in the cylinder body so as to adjust the height of the vibration rod in the cylinder body, so that multiple tests are carried out, different vibration positions are adjusted, in addition, the side edge of the cylinder body is provided with the feeding door, and the water stop belt is arranged at the joint of the feeding door and the cylinder body, so that the cylinder body is prevented from water seepage outwards after water injection; the device is arranged the vibration source in the sand bed, compares this experimental apparatus vibration force more concentrated with prior art, and the influence of the different buried depth sand liquefaction is researched to the center vibration effect of accessible regulation different vibration frequency.
Drawings
In order to more clearly illustrate the embodiments of the present utility model or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, and it is obvious that the drawings in the following description are only some embodiments of the present utility model, and other drawings may be obtained according to the structures shown in these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic diagram of a vibration liquefaction model test apparatus provided by the present utility model;
FIG. 2 is a front view of the structure of the vibration liquefaction model test apparatus provided by the present utility model;
FIG. 3 is a schematic diagram of a vibration device and a driving motor;
fig. 4 is a schematic structural view of the mounting assembly.
[ reference numerals description ]
1. A cylinder; 2. a feed gate; 3. a vibrating rod; 31. a shock absorbing member; 32. a transmission shaft; 4. a driving motor; 5. a lifting bracket; 6. a mounting assembly; 61. a first mounting frame; 62. a second mounting frame; 63. a support rod; 64. a through hole; 7. a fixed bracket; 71. a chute; 8. a winch; 81. a rope; 82. a fixed pulley; 9. and the variable frequency controller.
Detailed Description
The following description of the embodiments of the present utility model will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all embodiments of the utility model. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.
It should be noted that all directional indicators such as first, second, up, down, left, right, front, and rear … … are merely used to explain the relative positional relationship, movement, etc. between the components in a particular posture as shown in the drawings, and if the particular posture is changed, the directional indicator is changed accordingly.
In addition, the technical solutions of the embodiments of the present utility model may be combined with each other, but it is necessary to be based on the fact that those skilled in the art can implement the technical solutions, and when the technical solutions are contradictory or cannot be implemented, the combination of the technical solutions should be considered as not existing, and not falling within the scope of protection claimed by the present utility model.
The utility model provides a vibration liquefaction model test device, which is shown in fig. 1-4, and comprises a cylinder body 1, a lifting device arranged on the cylinder body 1 and a vibration device arranged on the lifting device, wherein the vibration device comprises a driving motor 4 and a vibration rod 3, the driving motor 4 drives the vibration rod 3 to vibrate, the lifting device drives the vibration rod 3 to move up and down in the cylinder body 1, a feed door 2 is arranged on the side edge of the cylinder body 1, and a water stop belt is arranged at the joint of the feed door 2 and the cylinder body 1; specifically, the left side of the feeding door 2 is connected with the cylinder body 1 through a hinge, the right side of the feeding door is connected with the cylinder body 1 through a bolt, a water stop is arranged in a gap between the feeding door 2 and the cylinder body 1, and the water stop is a strip-shaped water stop. According to the vibration liquefaction model test device provided by the utility model, through the arrangement of the cylinder body 1, the lifting device arranged on the cylinder body 1 and the vibration device arranged on the lifting device, the vibration device comprises the driving motor 4, the driving motor 4 drives the vibration rod 3 of the vibration device to vibrate, the lifting device drives the vibration rod 3 of the vibration device to move up and down in the cylinder body 1 so as to adjust the height of the vibration rod 3 in the cylinder body 1, so that multiple tests are carried out, different vibration positions are adjusted, in addition, the side edge of the cylinder body 1 is provided with the feed gate 2, and the joint of the feed gate 2 and the cylinder body 1 is provided with the water stop belt to prevent the cylinder body 1 from water seepage outwards after water injection; the device is arranged the vibration source in the sand bed, compares this experimental apparatus vibration force more concentrated with prior art, and the influence of the different buried depth sand liquefaction is researched to the center vibration effect of accessible regulation different vibration frequency.
In the vibration liquefaction model test device provided by the utility model, as shown in fig. 1 and 3, the vibration device further comprises a mounting assembly 6 and a vibration assembly, the driving motor 4 is arranged at the top of the mounting assembly 6, the bottom of the mounting assembly 6 is connected with the vibration assembly, and a transmission shaft 32 of the driving motor 4 penetrates through the mounting assembly 6 to extend into the vibration assembly to provide a vibration source.
Further, as shown in fig. 4, in the vibration liquefaction model test apparatus provided by the present utility model, the installation component 6 includes a first installation frame 61, a second installation frame 62, and a support rod 63 connecting the first installation frame 61 and the second installation frame 62, the diameter of the first installation frame 61 is greater than the diameter of the second installation frame 62, the driving motor 4 is installed on the first installation frame 61, a through hole 64 for the transmission shaft 32 of the driving motor 4 to pass through is opened at the center position of the first installation frame 61, the bottom of the second installation frame 62 is connected with the vibration component, and specifically, the first installation frame 61 and the second installation frame 62 are both circular installation frames.
In the vibration liquefaction model test device provided by the utility model, the vibration rod 3 is provided with the vibration absorbing piece 31, the top end of the vibration rod 3 is connected with the second mounting frame 62, the transmission shaft 32 of the driving motor 4 stretches into the vibration rod 3, and the vibrators at the upper end and the lower end of the vibration rod 3 are connected through the rubber vibration absorbing piece 31, so that vibration can be concentrated at the lower end of the vibration rod 3.
As shown in fig. 1, the lifting device comprises a fixing bracket 7 and a lifting bracket 5, the fixing bracket 7 is arranged at the top of the cylinder body 1, the lifting bracket 5 is slidably connected with the fixing bracket 7, and the lifting bracket 5 is provided with a first mounting frame 61. Specifically, the bottom of the fixing bracket 7 is fixed at the top edge of the cylinder 1. The two outsides of the lifting support 5 are provided with pulleys, the two insides of the fixing support 7 are provided with sliding grooves 71 matched with the pulleys, the lifting support 5 slides in the sliding grooves 71 through the pulleys, as shown in fig. 1, the lifting support 5 can slide up and down in the fixing support 7, the two ends of a first base of the fixing support 7 are arranged along the diameter of the cylinder body 1 and fixedly connected with the top edge of the cylinder body 1, a second base provided with a winch 8 is arranged on the circumference outside of the cylinder body 1 and on the circumference corresponding to the central position of the first base, so that a triangular fixing area is formed, the equipment stability is improved, and a rectangular supporting frame of the fixing support 7 is vertically connected with the first base along the axial direction of the cylinder body 1, so that the vibrating rod 3 can lift in the vertical direction. In addition, the lifting bracket 5 is a tripod lifting bracket 5, and one of the sub-brackets of the tripod lifting bracket 5 is horizontally provided for horizontally fixing the first mounting bracket 61.
Further, the lifting device further comprises a winch 8, the winch 8 is arranged on the fixed support 7, a fixed pulley 82 is arranged at the top end of the fixed support 7, the winch 8 is connected with the lifting support 5 through a winch rope 81 bypassing the fixed pulley 82, and the winch 8 rotates to drive the lifting support 5 to slide in the fixed support 7. Specifically, a rope 81 is fixed to the upper end of the lifting frame 5, and the other end of the rope 81 passes around a fixed pulley 82 at the top end of the fixed frame 7 and is connected to the winch 8, so that the lifting frame 5 is lifted or lowered by rotating the winch 8, and the height of the vibration rod 3 on the lifting frame 5 is adjusted.
In addition, in the vibration liquefaction model test device provided by the utility model, the driving motor 4 is connected with the variable frequency controller 9, so as to control the rotating speed of the driving motor 4, and further adjust the vibration frequency of the vibration rod 3.
The utility model also provides a test method of the vibration liquefaction model test device, which comprises the following steps:
s1: setting an initial position of the vibrating rod 3, a position of soil sensor equipment, a sand depth, an initial water level, a vibration frequency and a vibration duration;
s2: adding water and sand into the cylinder body 1 according to a preset sand depth to the burying depth of the soil sensor equipment, burying the soil sensor equipment, connecting the soil sensor equipment to the data acquisition equipment, and continuously adding water and sand until the preset sand depth;
s3: waiting for soil body consolidation in the cylinder body 1 for 24 hours;
s4: starting a data acquisition device to record data of the soil body sensor device;
s5: adjusting the rotating speed of the driving motor 4 according to the preset vibration frequency of the vibration rod 3 until the vibration rod 3 reaches the preset frequency;
s6: after a group of vibration liquefaction simulation tests are completed, the vibration rod 3 is lifted until the vibration rod is separated from the surface of the soil body;
s7: and (3) changing parameters such as vibration frequency, vibration duration, sensor position and the like, performing a plurality of groups of tests and recording data.
S8: and after all groups of vibration liquefaction simulation tests are completed, the motor power switch and the switch of the data acquisition equipment are turned off.
Preferably, the soil mass sensor device comprises a soil mass pore water pressure sensor, a soil pressure sensor and an acceleration sensor.
It should be understood that the above description of the specific embodiments of the present utility model is only for illustrating the technical route and features of the present utility model, and is for enabling those skilled in the art to understand the present utility model and implement it accordingly, but the present utility model is not limited to the above-described specific embodiments. All changes or modifications that come within the scope of the appended claims are intended to be embraced therein.
Claims (8)
1. The utility model provides a vibration liquefaction model test device, its characterized in that includes cylinder body (1), locates elevating gear on cylinder body (1) and locate vibrating device on the elevating gear, vibrating device includes driving motor (4) and vibrating rod (3), driving motor (4) drive vibrating rod (3) vibration, elevating gear drives vibrating rod (3) are in up-and-down motion in cylinder body (1).
2. The vibration liquefaction model test device according to claim 1, further comprising a mounting assembly (6) and a vibration assembly, wherein the driving motor (4) is arranged at the top of the mounting assembly (6), the bottom of the mounting assembly (6) is connected with the vibration assembly, and a transmission shaft (32) of the driving motor (4) penetrates through the mounting assembly (6) and stretches into the vibration assembly to provide a vibration source.
3. The vibration liquefaction model test device according to claim 2, wherein the mounting assembly (6) comprises a first mounting frame (61), a second mounting frame (62) and a supporting rod (63) for connecting the first mounting frame (61) and the second mounting frame (62), the diameter of the first mounting frame (61) is larger than that of the second mounting frame (62), the driving motor (4) is mounted on the first mounting frame (61), a through hole (64) for the transmission shaft (32) of the driving motor (4) to pass through is formed in the central position of the first mounting frame (61), and the bottom of the second mounting frame (62) is connected with the vibration assembly.
4. A vibration liquefaction model test device according to claim 3, characterized in that the vibration rod (3) is provided with a damping member (31), the top end of the vibration rod (3) is connected with the second mounting frame (62), and the transmission shaft (32) of the driving motor (4) extends into the vibration rod (3).
5. The vibration liquefaction model test device according to claim 4, wherein the lifting device comprises a fixed support (7) and a lifting support (5), the fixed support (7) is arranged at the top of the cylinder body (1), the lifting support (5) is in sliding connection with the fixed support (7), and the first mounting frame (61) is mounted on the lifting support (5).
6. The vibration liquefaction model test device according to claim 5, wherein pulleys are arranged on two outer sides of the lifting support (5), sliding grooves (71) matched with the pulleys are arranged on two inner sides of the fixing support (7), and the lifting support (5) slides in the sliding grooves (71) through the pulleys.
7. The vibration liquefaction model test device according to claim 5, wherein the lifting device further comprises a winch (8), the winch (8) is arranged on the fixed support (7), a fixed pulley (82) is arranged at the top end of the fixed support (7), the winch (8) is connected with the lifting support (5) through a winch rope (81) which bypasses the fixed pulley (82), and the winch (8) rotates to drive the lifting support (5) to slide in the fixed support (7).
8. The vibration liquefaction model test device according to any one of claims 1 to 7, wherein the driving motor (4) is connected with a variable frequency controller (9).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322102718.9U CN220666301U (en) | 2023-08-07 | 2023-08-07 | Vibration liquefaction model test device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322102718.9U CN220666301U (en) | 2023-08-07 | 2023-08-07 | Vibration liquefaction model test device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220666301U true CN220666301U (en) | 2024-03-26 |
Family
ID=90342281
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202322102718.9U Active CN220666301U (en) | 2023-08-07 | 2023-08-07 | Vibration liquefaction model test device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220666301U (en) |
-
2023
- 2023-08-07 CN CN202322102718.9U patent/CN220666301U/en active Active
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