CN210427197U - Test device for simulating surface fracture deformation of normal fault under earthquake - Google Patents
Test device for simulating surface fracture deformation of normal fault under earthquake Download PDFInfo
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- CN210427197U CN210427197U CN201921464602.7U CN201921464602U CN210427197U CN 210427197 U CN210427197 U CN 210427197U CN 201921464602 U CN201921464602 U CN 201921464602U CN 210427197 U CN210427197 U CN 210427197U
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Abstract
The utility model discloses a test device that positive fault earth's surface broke and warp under simulation earthquake, include: the device comprises a soil box, a profile steel frame, a limiting device and an actuator; the soil body box is fixed on the section steel framework, and the bottom plate of the soil body box is divided into two movable steel plates; the movable steel plate is movable around. The top of the actuator is contacted with the middle part of the lower surface of the movable steel plate; the movable steel plate plays a role in bearing soil and pushing the soil under the pushing of the actuator. And two sides of the movable steel plate are respectively provided with a limiting device, and the limiting devices are used for restricting the movable steel plate to be lifted at a certain angle and track when the movable steel plate is jacked up by the actuator, so that the lifting of the upper disc soil body on the earthquake mid-reverse fault is simulated. The utility model has the advantages that: the error is within a controllable range. The test phenomenon is obvious, the operation repeatability is strong, the experimental result is in accordance with the previous research and experience practice, the basis can be provided for the design construction of avoiding and anti-breaking of the building in the strong earthquake cracking area, and casualties and property loss are reduced.
Description
Technical Field
The utility model relates to an earthquake simulation test technical field, in particular to test device that positive fault earth's surface broke and warp under simulation earthquake.
Background
The strong earthquake ground surface fracture effect is a phenomenon that a fracture zone is transmitted to the ground surface under the action of earthquake fault dislocation, and the ground surface and nearby building structures are damaged or even collapsed. The fault dislocation can cause the deformation of an overlying soil layer, the deformation of the soil layer can threaten the stability of a foundation of a building (structure) built on the soil layer, and the building needs to carry out avoidance or anti-fracture design. Therefore, the research on the mechanism of the overburden layer rupture development and the foundation failure of the building near the fault caused by fault dislocation has important engineering practical value and scientific significance. Wherein, model test is an important research means.
At present, a common test device for simulating fault dislocation mainly uses a small servo motor as a loading device, and has respective technical defects: (1) the loading device at the bottom of the simulation box body has small load power and cannot well finish large-size and large-scale fault tests; (2) the balanced and uniform dislocation of the model box body in the loading process is difficult to technically realize, so that the precision of the test result is low; (3) many experimental simulation boxes are small-sized, and the real fracture condition of the overlying soil body under fault dislocation cannot be well reproduced.
SUMMERY OF THE UTILITY MODEL
The utility model discloses to prior art's defect, provide a test device that positive fault earth's surface broke and warp under the simulation earthquake, solved the defect that exists among the prior art.
In order to realize the purpose of the utility model, the utility model discloses the technical scheme who takes as follows:
a test device for simulating the fracture and deformation of the earth surface of a normal fault under earthquake comprises: the device comprises a counter-force floor, a soil body box, a profile steel frame, four limiting devices and two actuators;
the soil body box is a rectangular container and is used for containing soil; the soil body box is fixed on the profile steel frame, and the bottom of the profile steel frame is fixed on the counter-force floor;
the bottom plate of the soil body box is divided into two movable steel plates; the peripheries of the two movable steel plates are not connected with the soil box, and the peripheries of the movable steel plates are closely adjacent to the periphery of the bottom surface of the soil box through canvas soft connection, so that the soil is prevented from falling in the loading process;
the actuator is arranged in the profile steel frame, under the soil body box, the bottom of the actuator is fixed on the counter-force floor, and the top of the actuator is in contact with the middle part of the lower surface of the movable steel plate; the movable steel plates play a role in bearing soil and pushing soil under the pushing of the actuators, and one actuator corresponds to one movable steel plate.
The two sides of one movable steel plate are respectively provided with a limiting device, the limiting devices on the two sides are parallel to each other, and the contact point of the actuator and the movable steel plate is arranged between the limiting devices on the two sides.
The limiting device is used for restraining the movable steel plate from being lifted by the actuator at a certain angle and a fixed position, so that the lifting of the earth body of the normal fault in the earthquake is simulated.
Furthermore, the limiting device consists of an angle adjusting device and a guiding device, the angle adjusting device is welded and fixed on the section steel frame, the position of the angle adjusting device is positioned below two sides of the movable steel plate, and the guiding device is connected with the angle adjusting device through two bolts.
The angle adjusting device is a square steel plate, two opposite angles of the angle adjusting device are respectively provided with a group of screw holes, and angle control is carried out by the principle that a straight line is determined by two different screw holes.
The guiding device is composed of a steel cylinder in a hollow rectangular shape and a sliding block made of steel and capable of sliding in the steel cylinder. The side of the steel cylinder is provided with two screw holes which are fixedly connected with the screw holes of the angle adjusting device through two bolt bolts, the upper end of the sliding block is hinged and fixed with the lower surface of the movable steel plate, and the steel cylinder is used for enabling the sliding block to form an upward track and constraining the lifting angle and the track of the movable steel plate.
Compared with the prior art, the utility model has the advantages of:
the movable steel plate can be synchronously and horizontally lifted at a certain angle under the constraint of the guide device, and the error is within a controllable range. The test phenomenon is obvious, the operation can be repeated strongly, and the experimental result is in accordance with the previous research and experience practice. The device is used for carrying out tests and data analysis of a large number of working conditions, can deeply research the damage phenomenon and mechanism of soil deformation near the normal fault, particularly buildings, can provide basis for the design construction of avoiding and anti-breaking of the buildings in the strong earthquake fracture area, and reduces casualties and property loss.
Drawings
FIG. 1 is a schematic structural diagram of a testing apparatus according to an embodiment of the present invention;
figure 2 is a top view of a soil box according to an embodiment of the present invention;
FIG. 3 is a schematic view of a restriction device according to an embodiment of the present invention;
fig. 4 is a schematic structural diagram of an angle adjusting device according to an embodiment of the present invention;
FIG. 5 is a front view of a steel cylinder according to an embodiment of the present invention;
fig. 6 is a top view of a steel cylinder according to an embodiment of the present invention.
Description of reference numerals: the soil box is 1, the section steel frame is 2, the limiting device is 3, the actuator is 4, the movable steel plate is 5, the sliding block is 6, the angle adjusting device is 7, the guiding device is 8, and the steel cylinder is 9.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be further described in detail with reference to the accompanying drawings and examples.
As shown in fig. 1 and 2, a test device for simulating the surface fracture deformation of a normal fault under earthquake comprises: a counter-force floor, a soil body box 1, a section steel frame 2, four limiting devices 3 and two actuators 4,
the soil body box 1 is a rectangular container and is used for containing soil; the soil body box 1 is fixed on the section steel frame 2, and the bottom of the section steel frame 2 is fixed on the counter-force floor;
the bottom plate of the soil body box 1 is divided into two movable steel plates 5; the peripheries of the two movable steel plates 5 are not connected with the soil body box 1, the peripheries of the movable steel plates 5 are closely adjacent to the periphery of the bottom surface of the soil body box 1 in a canvas flexible connection mode, and the soil is prevented from falling in the loading process.
The actuator 4 is arranged in the profile steel frame 2, the bottom of the actuator 4 is fixed on the counter-force floor under the soil body box 1, and the top of the actuator 4 is contacted with the middle part of the lower surface of the movable steel plate 5; the movable steel plate 5 plays a role in bearing soil and pushing soil under the pushing of the actuator 4. One actuator 4 corresponds to one movable steel plate 5.
A limiting device 3 is respectively arranged on two sides of a movable steel plate 5, the limiting devices 3 on the two sides are parallel to each other, and the contact point of an actuator 4 and the movable steel plate 5 is arranged between the limiting devices 3 on the two sides.
The limiting device 3 is used for limiting the movable steel plate 5 to be lifted by the actuator 4 at a certain angle fixed position. Therefore, the lifting of the earth body of the normal fault in the earthquake is simulated.
Two sides of the soil body box 1 are steel plates with the thickness of 15mm, and the front side is supported by double-layer organic glass with the thickness of 12mm and a square steel pipe with the thickness of 8mm and the thickness of 80 mm.
As shown in fig. 3, the limiting device 3 is composed of an angle adjusting device 7 and a guiding device 8, the angle adjusting device 7 is welded and fixed on the section steel frame 2 and is positioned below two sides of the movable steel plate 5, and the guiding device 8 is connected with the angle adjusting device 7 through two bolts.
As shown in fig. 4, the angle adjusting device 7 is a square steel plate with a thickness of 30mm, two opposite corners of the angle adjusting device 7 are respectively provided with a group of screw holes, and angle control is performed by the principle that a straight line is determined by two different screw holes, and in this embodiment, a group of four screw holes are provided, so that angle changes of 30 °, 45 °, 60 ° and 75 ° are realized.
As shown in fig. 5 and 6, the guide 8 is composed of a steel cylinder 9 in the shape of a hollow rectangular body and a steel slider 6 slidable in the steel cylinder 9. The side of the steel cylinder 9 is provided with two screw holes to two bolt bolts are fixedly connected to the screw holes of the angle adjusting device 7, the upper end of the sliding block 6 is hinged and fixed with the lower surface of the movable steel plate 5, and the steel cylinder 9 is used for enabling the sliding block 6 to form an upward track and constraining the lifting angle and the track of the movable steel plate 5.
The test device's experimental flow as follows:
filling clay into the soil box 3 in layers, tamping the clay in layers, and burying sensors such as soil pressure gauges and accelerometers in different positions in the soil according to a set test scheme; and a displacement sensor and the like can be placed on the upper surface of the soil body. The adjustment actuator 4 is the same as and consistent with the required angle of the test. When the test is started, the actuator 4 is controlled to lift at a set speed, the actuator 4 lifts the movable steel plate 5, and the movable steel plate 5 lifts the soil layer at the set speed under the constraint of the guide device 8. Recording the change data of each sensor in the jacking process by using a data acquisition system; and observing and analyzing the experimental phenomenon.
It will be appreciated by those of ordinary skill in the art that the examples described herein are intended to assist the reader in understanding the manner of practicing the invention, and it is to be understood that the scope of the invention is not limited to such specific statements and examples. Those skilled in the art can make various other specific modifications and combinations based on the teachings of the present invention without departing from the spirit of the invention, and such modifications and combinations are still within the scope of the invention.
Claims (2)
1. A test device for simulating the fracture and deformation of the earth surface of a normal fault under earthquake is characterized by comprising: the device comprises a counter-force floor, a soil body box, a profile steel frame, four limiting devices and two actuators;
the soil body box is a rectangular container and is used for containing soil; the soil body box is fixed on the profile steel frame, and the bottom of the profile steel frame is fixed on the counter-force floor;
the bottom plate of the soil body box is divided into two movable steel plates; the peripheries of the two movable steel plates are not connected with the soil box, and the peripheries of the movable steel plates are closely adjacent to the periphery of the bottom surface of the soil box through canvas soft connection, so that the soil is prevented from falling in the loading process;
the actuator is arranged in the profile steel frame, under the soil body box, the bottom of the actuator is fixed on the counter-force floor, and the top of the actuator is in contact with the middle part of the lower surface of the movable steel plate; the movable steel plates are pushed by the actuators to take the effect of receiving soil and pushing the soil, and one actuator corresponds to one movable steel plate;
two sides of one movable steel plate are respectively provided with a limiting device, the limiting devices on the two sides are parallel to each other, and the contact point of the actuator and the movable steel plate is arranged between the limiting devices on the two sides;
the limiting device is used for restraining the movable steel plate from being lifted by the actuator at a certain angle and a fixed position, so that the lifting of the earth body of the normal fault in the earthquake is simulated.
2. The test device for simulating the surface fracture deformation of the normal fault under the earthquake according to claim 1, wherein: the limiting device consists of an angle adjusting device and a guiding device, the angle adjusting device is welded and fixed on the section steel frame and is positioned below two sides of the movable steel plate, and the guiding device is connected with the angle adjusting device through two bolts;
the angle adjusting device is a square steel plate, two opposite angles of the angle adjusting device are respectively provided with a group of screw holes, and angle control is carried out by the principle that a straight line is determined by two different screw holes;
the guide device consists of a steel cylinder in a hollow rectangular shape and a sliding block made of steel and capable of sliding in the steel cylinder; the side of the steel cylinder is provided with two screw holes which are fixedly connected with the screw holes of the angle adjusting device through two bolt bolts, the upper end of the sliding block is hinged and fixed with the lower surface of the movable steel plate, and the steel cylinder is used for enabling the sliding block to form an upward track and constraining the lifting angle and the track of the movable steel plate.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201921464602.7U CN210427197U (en) | 2019-09-04 | 2019-09-04 | Test device for simulating surface fracture deformation of normal fault under earthquake |
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| CN201921464602.7U CN210427197U (en) | 2019-09-04 | 2019-09-04 | Test device for simulating surface fracture deformation of normal fault under earthquake |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111473934A (en) * | 2020-06-05 | 2020-07-31 | 防灾科技学院 | Device and method for simulating avoidance distance of buildings close to strong earthquake surface fractured zone |
| CN111473934B (en) * | 2020-06-05 | 2024-05-07 | 防灾科技学院 | Building avoiding distance simulation device and simulation method for fractured zone close to strong earthquake ground surface |
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2019
- 2019-09-04 CN CN201921464602.7U patent/CN210427197U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111473934A (en) * | 2020-06-05 | 2020-07-31 | 防灾科技学院 | Device and method for simulating avoidance distance of buildings close to strong earthquake surface fractured zone |
| CN111473934B (en) * | 2020-06-05 | 2024-05-07 | 防灾科技学院 | Building avoiding distance simulation device and simulation method for fractured zone close to strong earthquake ground surface |
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