CN214844563U - Horizontal cyclic loading system for foundation indoor geotechnical model test - Google Patents
Horizontal cyclic loading system for foundation indoor geotechnical model test Download PDFInfo
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- CN214844563U CN214844563U CN202121168744.6U CN202121168744U CN214844563U CN 214844563 U CN214844563 U CN 214844563U CN 202121168744 U CN202121168744 U CN 202121168744U CN 214844563 U CN214844563 U CN 214844563U
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Abstract
The utility model discloses a horizontal cyclic loading system for foundation indoor geotechnical model test, which comprises a door-shaped gantry steel framework; the first movable suspension fixing device, the second movable suspension fixing device and the third movable suspension fixing device are sequentially arranged on the door-shaped gantry steel framework at intervals; the first movable suspension fixing device is connected with the left pulley, the second movable suspension fixing device is connected with the steel strand fixing clamp, and the third movable suspension fixing device is fixedly connected with the right pulley; one end of the steel strand close to the left pulley is connected with a left balance weight, and the steel strand between the left pulley and the steel strand fixing clamp is connected with a similar structure model on the upper part of the foundation through a rubber hoop; a tension sensor is arranged on the steel strand between the steel strand fixing clamp and the right pulley, and one end of the steel strand close to the right pulley is connected with a right counterweight balance weight; the right counterweight balance weight is fixed on the motor driving device.
Description
Technical Field
The utility model belongs to the technical field of horizontal loading, concretely relates to indoor geotechnique model test's of foundation horizontal circulation loading system.
Background
Due to the influence of waves, water currents, wind loads and the like, the superstructure of foundation foundations (e.g., pile foundations, underground continuous walls) is required to withstand horizontal cyclic loads for a long period of time. The bearing capacity of the soil around the foundation base can be weakened under long-term horizontal cyclic load, so that the safe service of the foundation and the superstructure is influenced. Therefore, it is necessary to develop a research on the bearing characteristics of the foundation under horizontal cyclic load, and the indoor geotechnical model test is an important means and method for developing related research.
At present, relevant devices and schemes exist for indoor horizontal cyclic loading of foundation foundations. However, it should be noted that the related device principles and operations are complicated and it is difficult to realize the loading of multi-directional horizontal cyclic loading and control frequency. Therefore, it is necessary to develop a simple and effective horizontal cyclic loading test system for the foundation indoor geotechnical model test, and a great promotion effect will be generated on the horizontal cyclic stress analysis of the foundation.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to the aforesaid is not enough among the prior art, provides the horizontal circulation loading system of the indoor geotechnological model test of foundation to solve or improve foretell problem.
In order to achieve the purpose, the utility model adopts the technical proposal that:
on one hand, the horizontal circulating loading system for the foundation indoor geotechnical model test comprises a door-shaped gantry steel framework; the first movable suspension fixing device, the second movable suspension fixing device and the third movable suspension fixing device are sequentially arranged on the door-shaped gantry steel framework at intervals; the first movable suspension fixing device is connected with the left pulley, the second movable suspension fixing device is connected with the steel strand fixing clamp, and the third movable suspension fixing device is fixedly connected with the right pulley; the left pulley, the steel strand fixing clamp and the right pulley are sequentially connected through a steel strand;
one end of the steel strand close to the left pulley is connected with a left balance weight, and the steel strand between the left pulley and the steel strand fixing clamp is connected with a similar structure model on the upper part of the foundation through a rubber hoop; a tension sensor is arranged on the steel strand between the steel strand fixing clamp and the right pulley, and one end of the steel strand close to the right pulley is connected with a right counterweight balance weight; the right counterweight balance weight is fixed on the motor driving device.
Further, the similar structure model on the foundation base is arranged on the similar model of the foundation base, the similar model of the foundation base is contained in the similar model material of the foundation filling, and the similar model material of the foundation filling is uniformly distributed in the model groove.
Further, the steel strand fixing clamp comprises a fixing hole channel, and the steel strand penetrates through the fixing hole channel and is anchored through clamping plugs at two ends.
Further, the fixed aperture is rigidly connected to the second mobile suspension fixture.
Further, the motor driving device comprises a protective shell, and an arc-shaped smooth track is arranged in the protective shell; and a driving component for driving the right counterweight balance weight to move up and down is arranged in the smooth track.
Furthermore, the driving assembly comprises a half-moon rotor which can rotate, and the half-moon rotor is rotationally connected with the rotating shaft of the motor and used for driving the half-moon rotor to rotate; the movable pore channel on the semilunar rotor is movably connected with the connecting rod through a fixing bolt, and the distance between the connecting rod and the rotating shaft is adjusted by adjusting the position of the fixing bolt in the movable pore channel; the connecting rod is hinged with a piston positioned above the connecting rod; the top of piston and bracing piece bottom fixed connection, bracing piece top and the tray fixed connection that is used for fixed right counter weight balancing weight.
Further, the protective housing is mounted to the ground through a bottom stabilizing support.
The utility model provides an indoor geotechnical model test's of foundation horizontal circulation loading system has following beneficial effect:
the utility model discloses a left counter weight balance weight, steel strand wires fixing fixture, right counter weight balance weight and motor drive's ingenious cooperation has realized having stronger practicality and popularization nature to multidirectional horizontal circulation loading and frequency of control's loading.
Drawings
FIG. 1 is a schematic structural diagram of a loading test system.
Fig. 2 is a schematic structural diagram of the motor driving device.
Fig. 3 is a schematic structural view of the steel strand fixing clamp.
Fig. 4 is a unidirectional horizontal cyclic loading diagram.
Fig. 5 is a bidirectional asymmetric horizontal cyclic loading diagram.
Fig. 6 is a bidirectional symmetric horizontal cyclic loading diagram.
Wherein, 1, a left counterweight balance weight; 2. a left pulley; 3. a movable suspension fixture; 4. a door-shaped gantry steel framework; 5. a rubber cuff; 6. a similar structure model on the foundation; 7. steel strand wires; 8. filling soil in the foundation to form similar model materials; 9. a foundation base similarity model; 10. a tension sensor; 11. a mould groove; 12. a right pulley; 13. a right counterweight balancing weight; 14. a motor drive device; 15. fixing the fixture by the steel strand; 16. a tray; 17. a support bar; 18. a piston; 19. a motor shaft; 20. a connecting rod; 21. half-moon rotary slices; 22. fixing the bolt; 23. a protective shell; 24. a bottom stabilizing support; 25. a fixed pore channel; 26. the blocking plug is rotated.
Detailed Description
The following description of the embodiments of the present invention is provided to facilitate the understanding of the present invention by those skilled in the art, but it should be understood that the present invention is not limited to the scope of the embodiments, and various changes may be made apparent to those skilled in the art within the spirit and scope of the present invention as defined and defined by the appended claims.
First embodiment, referring to fig. 1, the horizontal cyclic loading system for foundation indoor geotechnical model test in the present scheme includes a door-shaped gantry steel framework 4 for bearing and supporting.
A plurality of movable hanging and fixing devices 3 are sequentially arranged on a door-shaped gantry steel framework 4 at intervals, and each movable hanging and fixing device 3 comprises a first movable hanging and fixing device, a second movable hanging and fixing device and a third movable hanging and fixing device which are sequentially and movably arranged.
The lower part of the first movable suspension fixing device is connected with the left pulley 2, the lower part of the second movable suspension fixing device is connected with the steel strand fixing clamp 15, and the lower part of the third movable suspension fixing device is fixedly connected with the right pulley 12; the left pulley 2, the steel strand fixing clamp 15 and the right pulley 12 are sequentially connected through a steel strand 7.
One end of a steel strand 7 close to the left pulley 2 is connected with the left counterweight balance weight 1, the steel strand 7 between the left pulley 2 and the steel strand fixing clamp 15 is connected with a similar structure model 6 on the foundation through a rubber hoop 5, the similar structure model 6 on the foundation is arranged on a similar model 9 on the foundation, the similar model 9 on the foundation is contained in a similar model material 8 on the foundation, and the similar model material 8 on the foundation is uniformly distributed in a mold groove 11.
A tension sensor 10 is arranged on the steel strand 7 between the steel strand fixing clamp 15 and the right pulley 12, and one end of the steel strand 7 close to the right pulley 12 is connected with a right counterweight balance weight 13; the right counterweight 13 is fixed to the motor drive 14.
In this embodiment, the motor driving device 14 capable of controlling the reciprocating up-and-down displacement is adopted to drive, the upward thrust force with periodic change is applied to the right counterweight balance weight 13, and then the dead weight G of the right counterweight balance weight 13 is driven by the high-strength steel strand 7, the right pulley 12 and the rubber cuff 5 which connect the right counterweight balance weight 13 and the foundation upper part similar structure model 62The resultant force F of the thrust T exerted on the right counterweight balance weight 13 by the motor driving device 14 capable of controlling reciprocating up and down displacement is transmitted to the similar structure model 6 on the upper part of the foundation, and simultaneously, the self weight G of the left counterweight balance weight 11The high-strength steel strand 7 and the rubber hoop 5 are transmitted to a similar structure model 6 on the upper part of the foundation through a left pulley 2.
At the moment, the resultant force acting on the similar structure model 6 on the upper part of the foundation is F-G1And the horizontal force acting on the foundation-based similar model 9 rigidly connected with the foundation-based upper similar structure model 6 is also F-G1By adjusting the range of the displacement value s during the vertical displacement of the motor driving device 14, the upward thrust T is controlled and the working angular speed w of the motor is controlled, so that the horizontal cyclic loads with different frequencies, amplitudes and directions can be applied to the foundation similar model 9.
The motor driving device 14 specifically includes: tray 16, bracing piece 17, piston 18, motor shaft 19, connecting rod 20, half moon piece 21, fixing bolt 22, protective housing 23 and bottom stabilizing support 24.
An arc-shaped smooth track is arranged in the protective shell 23; a driving assembly for driving the right counterweight balance weight 13 to move up and down is arranged in the smooth track, and the protective shell 23 is installed on the ground through a bottom stabilizing support 24.
The driving assembly comprises a half-moon rotor 21 capable of rotating, and the half-moon rotor 21 is rotationally connected with the motor rotating shaft 19 and is used for driving the half-moon rotor 21 to rotate; the movable pore channel on the semilunar rotor 21 is movably connected with the connecting rod 20 through a fixing bolt 22, and the distance between the connecting rod 20 and the rotating shaft is adjusted by adjusting the position of the fixing bolt 22 in the movable pore channel; the connecting rod 20 is hinged with the piston 18 positioned above the connecting rod; the top of the piston 18 is fixedly connected with the bottom of the support rod 17, and the top of the support rod 17 is fixedly connected with the tray 16 for fixing the right counterweight balance weight 13.
The operating principle of the motor drive 14 is: after the power is switched on, the motor rotating shaft 19 drives the half-moon rotor 21 to rotate clockwise, so as to drive the connecting rod 20 fixed on the half-moon rotor through the fixing bolt 22 to rotate and swing, the connecting rod 20 is hinged with the piston 18 at the upper part, at the moment, the piston 18 generates reciprocating up-and-down displacement in a smooth track formed by the protective shell 23, and the supporting rod 17 and the tray 16 on the piston 18 are driven to generate corresponding reciprocating up-and-down displacement.
The steel strand fixing jig 15 includes: a fixed tunnel 25 and a rotary bayonet 26; the steel strand wires 7 penetrate through the fixed pore channels 25 and are anchored through the clamping plugs, meanwhile, the fixed pore channels 25 are rigidly connected with the movable suspension fixing device, and it can be guaranteed that the tensile force borne by the steel strand wires 7 on the right side is not transmitted to the similar structure model 6 on the upper portion of the foundation base after the steel strand wire fixing clamping devices 15 are activated.
The connecting line of the central point of the motor rotating shaft 19 and the central point of the piston 18 is coincided with the central axis of the supporting rod 17; the central axis of the support bar 17 should be parallel to the plumb line. The inner diameter of the fixing tunnel 25 should be larger than the outer diameter of the steel strand 7.
The working principle of the scheme is as follows:
firstly, the left counterweight balance weight 1 and the right counterweight balance weight 13 are not connected to the steel strand 7, before loading, the steel strand fixing clamp 15 is activated, and the right counterweight balance weight 13 is fixed in the tray 16;
setting the angular speed w of the motor rotating shaft 19 to be 2 pi, starting the motor driving device 14, enabling the support rod 17 to bear force and push the tray 16 and the right counterweight balance weight 13 to generate periodic up-and-down displacement, and simultaneously applying an upward thrust T to the right counterweight balance weight 13 which changes periodically;
the tension sensor 10 collects the tension of the steel strand 7 on the right side of the steel strand fixing clamp 15 in real time, and the tension is the resultant force of the dead weight of the right counterweight balance weight 13 and the thrust T;
acquiring tension data acquired by the tension sensor 10, and if the acquired maximum tension value is smaller than a preset value, adjusting the position of the fixing bolt 22 in the movable pore channel to enable the connecting rod 20 to be far away from the rotating shaft, increasing the up-down displacement value of the supporting rod 17, and increasing the maximum tension value applied to the right counterweight balance weight 13; if the collected maximum tension value is larger than the preset value, adjusting the position of the fixing bolt 22 in the movable pore channel to enable the connecting rod 20 to be close to the rotating shaft, so that the up-down displacement value of the supporting rod 17 is reduced, and the maximum tension applied to the right counterweight balance weight 13 is reduced;
turning off the motor driving device 14, and resetting the angular speed w of the motor rotating shaft 19 according to the loading frequency f preset by the test;
w＝2πf
and (3) removing the steel strand fixing clamp 15, hanging the left counterweight balance weight 1 at one end of the steel strand 7 close to the left pulley 2, starting the motor driving device 14, and carrying out horizontal cyclic loading on the foundation model.
The horizontal cyclic loading of the foundation base model comprises unidirectional horizontal cyclic loading, bidirectional asymmetric horizontal cyclic loading and bidirectional symmetric horizontal cyclic loading.
Unidirectional horizontal cyclic loading, comprising: and starting the motor driving device 14 to horizontally and circularly load the foundation model.
Bidirectional asymmetric horizontal cyclic loading, comprising: when step S4 is executed, the tension sensor 10 collects the maximum tension value F not equal to the self weight G of the left counterweight balance weight 11。
Bidirectional symmetric horizontal cyclic loading, comprising: in the execution of step S4, the maximum tension value F collected by the tension sensor 10maxWith the minimum tensile force value FminAnd satisfies the following conditions:
Fmax－G1＝G1－Fmin。
while the present invention has been described in detail with reference to the embodiments, the scope of the present invention should not be limited to the embodiments. Various modifications and changes may be made by those skilled in the art without inventive step within the scope of the appended claims.
Claims (7)
1. The utility model provides an indoor geotechnological model test's of foundation horizontal circulation loading system which characterized in that: comprises a door-shaped gantry steel skeleton; the door-shaped gantry steel skeleton is sequentially provided with a first movable suspension fixing device, a second movable suspension fixing device and a third movable suspension fixing device at intervals; the first movable suspension fixing device is connected with the left pulley, the second movable suspension fixing device is connected with the steel strand fixing clamp, and the third movable suspension fixing device is fixedly connected with the right pulley; the left pulley, the steel strand fixing clamp and the right pulley are sequentially connected through a steel strand;
one end of the steel strand close to the left pulley is connected with a left balance weight, and the steel strand between the left pulley and the steel strand fixing clamp is connected with a similar structure model on the upper part of the foundation through a rubber hoop; a tension sensor is arranged on the steel strand between the steel strand fixing clamp and the right pulley, and one end of the steel strand close to the right pulley is connected with a right counterweight balance weight; and the right counterweight balance weight is fixed on the motor driving device.
2. The horizontal cyclic loading system for foundation base indoor geotechnical model test according to claim 1, characterized in that: the foundation upper part similar structure model is arranged on the foundation similar model, the foundation similar model is contained in the foundation filling similar model material, and the foundation filling similar model material is uniformly distributed in the model groove.
3. The horizontal cyclic loading system for foundation base indoor geotechnical model test according to claim 1, characterized in that: the steel strand fixing clamp comprises a fixing pore passage, and the steel strand penetrates through the fixing pore passage and is anchored through clamping plugs at two ends.
4. The horizontal cyclic loading system for foundation base indoor geotechnical model test according to claim 3, wherein: the fixed aperture is rigidly connected to a second movable suspended fixture.
5. The horizontal cyclic loading system for foundation base indoor geotechnical model test according to claim 1, characterized in that: the motor driving device comprises a protective shell, and an arc-shaped smooth track is arranged in the protective shell; and a driving assembly for driving the right counterweight balance weight to move up and down is arranged in the smooth track.
6. The horizontal cyclic loading system for foundation base indoor geotechnical model test according to claim 5, wherein: the driving assembly comprises a half-moon rotor which can rotate, and the half-moon rotor is rotationally connected with the motor rotating shaft and used for driving the half-moon rotor to rotate; the movable pore channel on the semilunar rotor is movably connected with the connecting rod through a fixing bolt, and the distance between the connecting rod and the rotating shaft is adjusted by adjusting the position of the fixing bolt in the movable pore channel; the connecting rod is hinged with a piston positioned above the connecting rod; the top of the piston is fixedly connected with the bottom of the supporting rod, and the top of the supporting rod is fixedly connected with a tray for fixing a right counterweight balance weight.
7. The horizontal cyclic loading system for foundation base indoor geotechnical model test according to claim 5, wherein: the protective housing is mounted on the ground through a bottom stabilizing support.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121168744.6U CN214844563U (en) | 2021-05-27 | 2021-05-27 | Horizontal cyclic loading system for foundation indoor geotechnical model test |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121168744.6U CN214844563U (en) | 2021-05-27 | 2021-05-27 | Horizontal cyclic loading system for foundation indoor geotechnical model test |
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| Publication Number | Publication Date |
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| CN214844563U true CN214844563U (en) | 2021-11-23 |
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| CN202121168744.6U Active CN214844563U (en) | 2021-05-27 | 2021-05-27 | Horizontal cyclic loading system for foundation indoor geotechnical model test |
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- 2021-05-27 CN CN202121168744.6U patent/CN214844563U/en active Active
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