CN111076895B - Seabed landslide simulation system and test method based on wave vibration effect - Google Patents
Seabed landslide simulation system and test method based on wave vibration effect Download PDFInfo
- Publication number
- CN111076895B CN111076895B CN202010058372.5A CN202010058372A CN111076895B CN 111076895 B CN111076895 B CN 111076895B CN 202010058372 A CN202010058372 A CN 202010058372A CN 111076895 B CN111076895 B CN 111076895B
- Authority
- CN
- China
- Prior art keywords
- landslide
- simulation
- wave
- test
- pore pressure
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 238000004088 simulation Methods 0.000 title claims abstract description 89
- 230000000694 effects Effects 0.000 title claims abstract description 12
- 238000010998 test method Methods 0.000 title abstract description 5
- 239000011148 porous material Substances 0.000 claims abstract description 58
- 238000012360 testing method Methods 0.000 claims abstract description 52
- 238000006073 displacement reaction Methods 0.000 claims abstract description 40
- 230000007246 mechanism Effects 0.000 claims abstract description 37
- 230000005284 excitation Effects 0.000 claims abstract description 28
- 230000009471 action Effects 0.000 claims abstract description 17
- 238000012806 monitoring device Methods 0.000 claims abstract description 11
- 230000006378 damage Effects 0.000 claims abstract description 10
- 230000004044 response Effects 0.000 claims abstract description 8
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 34
- 238000012544 monitoring process Methods 0.000 claims description 32
- 239000011521 glass Substances 0.000 claims description 27
- 238000000034 method Methods 0.000 claims description 20
- 230000008569 process Effects 0.000 claims description 16
- 238000002347 injection Methods 0.000 claims description 9
- 239000007924 injection Substances 0.000 claims description 9
- 239000002689 soil Substances 0.000 claims description 8
- 239000000463 material Substances 0.000 claims description 5
- 229910000278 bentonite Inorganic materials 0.000 claims description 4
- 239000000440 bentonite Substances 0.000 claims description 4
- SVPXDRXYRYOSEX-UHFFFAOYSA-N bentoquatam Chemical compound O.O=[Si]=O.O=[Al]O[Al]=O SVPXDRXYRYOSEX-UHFFFAOYSA-N 0.000 claims description 4
- 239000004927 clay Substances 0.000 claims description 4
- 238000011161 development Methods 0.000 claims description 4
- 239000004576 sand Substances 0.000 claims description 4
- 238000003756 stirring Methods 0.000 claims description 4
- 238000009434 installation Methods 0.000 claims description 3
- 230000000149 penetrating effect Effects 0.000 claims description 3
- 238000012545 processing Methods 0.000 claims description 3
- 238000006424 Flood reaction Methods 0.000 claims description 2
- 230000007547 defect Effects 0.000 abstract description 8
- 238000004364 calculation method Methods 0.000 abstract description 4
- 238000011081 inoculation Methods 0.000 abstract description 4
- 238000011160 research Methods 0.000 description 7
- 238000009825 accumulation Methods 0.000 description 2
- 238000004422 calculation algorithm Methods 0.000 description 2
- 230000001066 destructive effect Effects 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 101710154918 Trigger factor Proteins 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000005553 drilling Methods 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M10/00—Hydrodynamic testing; Arrangements in or on ship-testing tanks or water tunnels
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/02—Details
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/32—Investigating strength properties of solid materials by application of mechanical stress by applying repeated or pulsating forces
- G01N3/36—Investigating strength properties of solid materials by application of mechanical stress by applying repeated or pulsating forces generated by pneumatic or hydraulic means
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- General Health & Medical Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- Life Sciences & Earth Sciences (AREA)
- Health & Medical Sciences (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Fluid Mechanics (AREA)
- Testing Or Calibration Of Command Recording Devices (AREA)
- Geophysics And Detection Of Objects (AREA)
Abstract
The invention relates to a seabed landslide simulation system and a seabed landslide test method based on wave vibration, which are mainly used for researching the dynamic response of a seabed landslide under the wave vibration effect and revealing the inoculation mechanism and the destruction mechanism of the seabed landslide. The device structurally comprises a frame supporting structure, a landslide simulation device, a wave simulation device and a landslide monitoring device, wherein the landslide simulation mechanism comprises a simulation landslide body and an inclination angle adjusting mechanism, the wave simulation mechanism comprises an excitation plate and an excitation driving mechanism, and the landslide monitoring device comprises a pore pressure monitor and a displacement sensor. The invention fully considers the important role of wave load in the submarine landslide, greatly overcomes the defects of large-scale harbor basin test and theoretical numerical calculation, and can be used for revealing the inoculation mechanism and the destruction mechanism of the submarine landslide under the action of wave load.
Description
Technical Field
The invention relates to the technical field of ocean geological disasters, in particular to a submarine landslide simulation system based on wave vibration, which is mainly used for researching dynamic response and triggering mechanism of a submarine landslide under the action of wave load.
Background
The submarine landslide is taken as a marine geological disaster with extremely destructive power, has great destructive effect on offshore projects such as submarine optical cables, wind power pile foundations, ports and wharfs, drilling platforms and the like, and brings immeasurable loss to coastal area development and people's life and property safety. Because the occurrence environment of the submarine landslide is obviously different from that of the land landslide, the causative mechanism and the trigger factor of the submarine landslide are complex. Accordingly, in recent years, the related research of the seabed landslide gradually becomes a research hotspot of the ocean engineering discipline and the ocean disaster discipline, and the research shows that the wave vibration effect is an important influencing factor for triggering the seabed landslide, in particular the offshore seabed landslide. The influence of wave vibration load on the submarine landslide is mainly divided into two aspects: 1. the wave is used as a vibration load, and the change of the stress condition of the landslide body is caused in the propagation process of the wave, so that the downward sliding acting force of the landslide body is increased circularly, and the stability of the landslide body is reduced; 2. the wave is used as a circulating load, and when the wave propagates, pore pressure changes in the landslide body, including instantaneous pore pressure and accumulated pore pressure, are caused, so that the effective strength of the soil body is reduced, and the stability of the landslide body is further reduced.
At present, the main means for researching the influence of waves on the submarine landslide in academia are as follows: theoretical algorithm, numerical simulation and large harbor basin physical model test. However, theoretical algorithms and numerical simulations are limited by more hypothesis, so that the degree of matching between the research result and the engineering reality is low; the large harbor basin physical model test is the most intuitive and reliable method for developing the related research of the submarine landslide at the present stage, but has the defects of high cost, long period and the like. At present, no small physical simulation equipment with laboratory scale exists, and the small physical simulation equipment can be used for carrying out experimental study on the influence of wave load on a sea wave landslide.
Disclosure of Invention
The invention provides a submarine landslide simulation system and a submarine landslide simulation method based on wave vibration, which are used for researching dynamic response and triggering mechanism of a submarine landslide under the action of wave load, and aims to overcome the defects of theoretical calculation and numerical simulation in the prior art and avoid the defects of high cost and long period of a large-scale harbor physical model test.
In order to achieve the above purpose, the present invention adopts the following technical scheme:
The invention discloses a seabed landslide simulation system based on wave vibration, which comprises a frame supporting structure, a landslide simulation device, a wave simulation device and a landslide monitoring device, wherein the frame supporting structure comprises a glass container, the landslide simulation mechanism comprises a simulation landslide body and an inclination angle adjusting mechanism, the wave simulation mechanism comprises an excitation plate and an excitation driving mechanism, the excitation plate is arranged at the top of the glass container through the excitation driving mechanism, the simulation landslide body is arranged at the bottom of the glass container, the inclination angle adjusting mechanism is arranged below the simulation landslide body, the landslide monitoring device comprises a pore pressure monitor and a displacement sensor, the pore pressure monitor is embedded in the simulation landslide body, the displacement sensor is arranged on the surface of the simulation landslide body, and the pore pressure monitor and the displacement sensor are used for monitoring and recording dynamic response of the simulation landslide body.
Preferably, the inclination angle adjusting mechanism comprises a spiral flywheel, a flywheel transverse shaft, a driving motor and a sliding plate, the sliding plate is arranged at the bottom of the simulated sliding body, a plurality of sliding plate bottom holes penetrating through the upper surface and the lower surface of the sliding plate are formed in the sliding plate, the flywheel transverse shaft is transversely arranged at the bottom of the glass container and located below the sliding plate, the spiral flywheel is arranged on the flywheel transverse shaft, the spiral flywheel abuts against the lower side of the sliding plate, and the driving motor drives the spiral flywheel to rotate through the flywheel transverse shaft.
Preferably, two parallel supporting beams are arranged at the bottom of the glass container, a flywheel transverse shaft is transversely arranged between the two supporting beams, and a transverse shaft bolt is arranged on the flywheel transverse shaft and fixedly connected with the supporting beams.
Preferably, the excitation driving mechanism comprises a bracket beam, supporting springs, spring bolts and a vibrating motor, wherein the bracket beam is arranged on the inner side of the glass container, the supporting springs are arranged above the bracket beam, four corners of the excitation plate are arranged at the top ends of the supporting springs and are connected with the supporting springs through the spring bolts, and the vibrating motor is arranged at the top of the excitation plate.
Preferably, the vibration excitation plate top is provided with a vibration motor bottom plate, the vibration motor bottom plate is fixedly connected with the vibration excitation plate through a plurality of bottom plate bolts, and the vibration motor is arranged on the vibration motor bottom plate.
Preferably, the frame supporting structure comprises supporting columns, supporting plates, glass containers and supporting beams, the supporting columns are arranged at four corners of the supporting plates, organic glass is arranged between the supporting columns above the supporting plates to form the glass containers, and two parallel supporting beams are arranged above the supporting plates.
The invention also provides a seabed landslide simulation test method based on the wave vibration effect, which is applied to the seabed landslide simulation system based on the wave vibration effect and comprises the following steps:
Step 1, preparing a simulated landslide: uniformly mixing ISO standard sand, remolded clay and bentonite according to a certain mixing ratio, adding a proper amount of water, and fully stirring; layering and stacking fully stirred soil materials into a simulated landslide body according to a mode set by a test;
step 2, monitoring equipment placement: in the layering stacking process of the simulated landslide body, arranging a pore pressure monitor and a displacement sensor according to the position set by the test; after the simulated landslide body is piled up, all monitoring equipment is connected with a host, initial monitoring data are debugged and obtained, and the integrity of the monitoring equipment is verified;
Step 3, landslide posture adjustment: starting a driving motor of the simulated landslide device, rotating the spiral flywheel to a proper position, and adjusting the sliding plate to a preset inclination angle;
step 4, vibration system installation: the exciting plate of the wave simulation system is tightly screwed with the supporting spring by adopting a spring bolt;
And 5, injecting water into the test equipment: injecting water into the test device, when the water level submerges the simulated landslide body, controlling the water injection rate, so as to reduce disturbance influence of the water injection process on the simulated landslide body, stopping water injection when the water level reaches a preset height, and standing for 48 hours;
step 6, landslide process simulation: resetting monitoring data of all monitoring devices, starting a vibration motor of a wave simulation system, taking the starting time as a time 0 point, dynamically monitoring pore water pressure and displacement deformation conditions of each part of a simulated landslide body in the test process through a pore pressure monitor and a displacement sensor, and ending the test until reaching a preset test time or after the simulated landslide body is unstable and damaged;
Step 7, monitoring data processing: establishing a time-displacement coordinate system by taking time as an abscissa and displacement as an ordinate, and drawing a monitoring data curve of a displacement sensor in the time-displacement coordinate system, so as to study the displacement deformation development conditions of different positions of the landslide body under the action of wave load; establishing a time-pore pressure coordinate system by taking time as an abscissa and pore pressure as an ordinate, and drawing a monitoring data curve of a pore pressure monitor in the time-pore pressure coordinate system, so as to study the accumulated distribution condition of pore water pressure at different positions of a landslide body under the action of wave load; and identifying a time point t f of landslide instability according to the time-displacement curve, and obtaining pore water pressure p f corresponding to a time point t f in the time-pore pressure curve, namely simulating the accumulated pore pressure threshold value of the landslide body under the test condition. In the wave load process, when the accumulated pore pressure in the seabed simulation landslide body does not exceed a threshold value p f, instability damage does not occur; when the accumulated pore pressure in the seabed simulation landslide body exceeds a threshold p f, triggering the instability and damage of the seabed landslide;
Step 8, repeating the simulation test: according to the test requirements, the soil mix proportion, vibration load amplitude, vibration load frequency, sliding plate inclination angle and other influencing factors can be changed, the test is repeatedly carried out according to the steps 1-7, and the accumulated pore pressure threshold value of the submarine landslide under different test conditions is researched.
The beneficial effects of the invention are as follows:
1. The seabed landslide simulation system based on the wave vibration effect is realized, the important effect of wave load in the seabed landslide is fully considered, the defects of theoretical calculation and numerical simulation are overcome, and the seabed landslide simulation test under various combined working conditions can be developed based on the actual geological condition and the sea condition of the seabed landslide.
2. The method overcomes the defects of high test cost and long period of the large harbor basin, simplifies wave vibration load into simple harmonic vibration load, transmits the simple harmonic vibration load through the combined use of the exciting plate and the supporting spring, realizes miniaturization and simplification of the test device on the premise of not changing mechanical essence, and greatly improves the operability of experimental equipment.
3. Through the combined use of the driving motor and the spiral flywheel, the gesture of the simulated landslide body is accurately adjustable within a certain range, and the submarine landslide simulation test under different geological conditions is conveniently carried out; the sliding plate air holes are formed in the sliding plate, so that accumulation of hole pressure on the contact surface of the sliding plate and the simulated landslide body is effectively avoided, and accuracy of a simulation test is greatly improved.
4. The combined dynamic monitoring of the pore pressure monitor and the displacement sensor is adopted, the dynamic response of the simulated landslide body under the action of wave load is fully reflected, and powerful data support is provided for the research of the inoculation mechanism and the destruction mechanism of the seabed landslide.
Drawings
FIG. 1 is a front view of a subsea landslide simulation system based on wave vibration action of the present invention.
Fig. 2 is a top view of a subsea landslide simulation system based on wave vibration action of the present invention.
Fig. 3 is a left side view of a subsea landslide simulation system based on wave vibration action of the present invention.
Fig. 4 is a cross-sectional view of a subsea landslide simulation system based on wave vibration action of the present invention.
Reference numerals in the drawings: 1: a support column; 2: a support plate; 3: organic glass; 4: a support beam; 5: a flywheel cross shaft; 6: a cross shaft bolt; 7: a spiral flywheel; 8: a driving motor; 9: a sliding plate; 10: a sliding plate bottom hole; 11: simulating a landslide body; 12: a pore pressure monitor; 13: a displacement sensor; 14: a bracket beam; 15: a support spring; 16: a spring bolt; 17: exciting plate; 18: a vibrating motor base plate; 19: a base plate bolt; 20: a vibration motor.
Detailed Description
The invention is further described below with reference to the drawings and detailed description.
As shown in fig. 1, fig. 2, fig. 3 and fig. 4, the seabed landslide simulation system based on wave vibration comprises a frame supporting structure, a landslide simulation device, a wave simulation device and a landslide monitoring device, wherein the frame supporting structure comprises a glass container, the landslide simulation mechanism comprises a simulation landslide body 11 and an inclination angle adjusting mechanism, the wave simulation mechanism comprises an excitation plate 17 and an excitation driving mechanism, the excitation plate 17 is arranged at the top of the glass container through the excitation driving mechanism, the simulation landslide body 11 is arranged at the bottom of the glass container, the inclination angle adjusting mechanism is arranged below the simulation landslide body 11, the landslide monitoring device comprises a pore pressure monitor 12 and a displacement sensor 13, the pore pressure monitor 12 is embedded in the simulation landslide body 11, the displacement sensor 13 is arranged on the surface of the simulation landslide body 11, and the pore pressure monitor 12 and the displacement sensor 13 are used for monitoring and recording dynamic responses of the simulation landslide body 11.
The simulated slope body is prepared by uniformly mixing ISO standard sand, remolded clay and bentonite according to a certain mixing ratio, adding a proper amount of water, and fully stirring; according to the mode set by the test, the fully stirred soil materials are layered and piled up.
The frame supporting structure comprises supporting columns 1, supporting plates 2, glass containers and supporting beams 4, the supporting columns 1 are arranged at four corners of the supporting plates 2, organic glass 3 is arranged between the supporting columns 1 above the supporting plates 2 to form the glass containers, and two parallel supporting beams 4 are arranged above the supporting plates 2.
The inclination angle adjusting mechanism comprises a spiral flywheel 7, a flywheel transverse shaft 5, a driving motor 8, a sliding plate 9 and a sliding plate bottom hole 10, the sliding plate 9 is arranged at the bottom of the simulated sliding slope body 11, the sliding plate 9 is provided with a plurality of sliding plate bottom holes 10 penetrating through the upper surface and the lower surface of the sliding plate 9, the flywheel transverse shaft 5 is transversely arranged at the bottom of a glass container and is positioned below the sliding plate 9, the spiral flywheel 7 is arranged on the flywheel transverse shaft 5, the spiral flywheel 7 abuts against the lower side of the sliding plate 9, and the driving motor 8 drives the spiral flywheel 7 to rotate through the flywheel transverse shaft 5. The flywheel transverse shaft 5 is transversely arranged between the two supporting beams 4, and the flywheel transverse shaft 5 is provided with a transverse shaft bolt 6 fixedly connected with the supporting beams 4.
The vibration excitation driving mechanism comprises a bracket beam 14, a supporting spring 15, a spring bolt 16 and a vibration motor 20, wherein the bracket beam 14 is arranged on the inner side of the glass container, the supporting spring 15 is arranged above the bracket beam 14, four corners of the vibration excitation plate 17 are arranged at the top end of the supporting spring 15 and are connected with the supporting spring 15 through the spring bolt 16, and the vibration motor 20 is arranged at the top of the vibration excitation plate 17. The vibration excitation plate 17 top is equipped with vibrating motor bottom plate 18, through a plurality of bottom plate bolts 19 fixed connection between vibrating motor bottom plate 18 and the vibration excitation plate 17, vibrating motor 20 sets up on vibrating motor bottom plate 18.
The invention also provides a seabed landslide simulation test method based on the wave vibration effect, which is applied to the seabed landslide simulation system based on the wave vibration effect and comprises the following steps:
Step 1, preparing a simulated landslide: uniformly mixing ISO standard sand, remolded clay and bentonite according to a certain mixing ratio, adding a proper amount of water, and fully stirring; according to the mode set by the test, the fully stirred soil materials are layered and piled up to form a simulated landslide body 11;
Step 2, monitoring equipment placement: in the layering and stacking process of the simulated landslide body 11, arranging a pore pressure monitor 12 and a displacement sensor 13 according to the positions set by the test; after the simulated landslide body 11 is piled up, all monitoring equipment is connected with a host, initial monitoring data are debugged and obtained, and the integrity of the monitoring equipment is verified;
Step 3, landslide posture adjustment: starting a driving motor 8 of the simulated landslide device, and rotating the spiral flywheel 7 to a proper position so that the sliding plate 9 is adjusted to a preset inclination angle;
Step 4, vibration system installation: the exciting plate 17 of the wave simulation system is tightly screwed with the supporting spring 15 by adopting a spring bolt 16;
And 5, injecting water into the test equipment: injecting water into the test device, when the water level floods the simulated landslide body 11, controlling the water injection rate, so as to reduce the disturbance influence of the water injection process on the simulated landslide body 11, stopping water injection when the water level reaches a preset height, and standing for 48 hours;
Step 6, landslide process simulation: resetting monitoring data of all monitoring devices, starting a vibration motor 20 of the wave simulation system, taking the starting time as a time 0 point, dynamically monitoring pore water pressure and displacement deformation conditions of each part of the simulated landslide body 11 in the test process through the pore pressure monitor 12 and the displacement sensor 13 until reaching a preset test time or after the simulated landslide body 11 is unstably damaged, and ending the test;
Step 7, monitoring data processing: establishing a time-displacement coordinate system by taking time as an abscissa and displacement as an ordinate, and drawing a monitoring data curve of the displacement sensor 13 in the time-displacement coordinate system, so as to study the displacement deformation development conditions of different positions of the landslide body 11 under the action of wave load; establishing a time-pore pressure coordinate system by taking time as an abscissa and pore pressure as an ordinate, and drawing a monitoring data curve of a pore pressure monitor 12 in the time-pore pressure coordinate system so as to study the accumulated distribution condition of pore water pressures at different positions of a simulated landslide body 11 under the action of wave load; and identifying a time point t f of landslide instability according to the time-displacement curve, and simulating the accumulated pore pressure threshold value of the landslide body 11 under the test condition by using pore water pressure p f corresponding to the time point t f in the time-pore pressure curve. In the wave load process, when the accumulated pore pressure in the seabed simulation landslide body 11 does not exceed a threshold p f, instability damage does not occur; when the accumulated pore pressure in the seabed simulation landslide body 11 exceeds a threshold value p f, triggering the instability and damage of the seabed landslide;
Step 8, repeating the simulation test: according to the test requirements, the soil mix proportion, vibration load amplitude, vibration load frequency, the inclination angle of the sliding plate 9 and other influencing factors can be changed, the test is repeatedly carried out according to the steps 1-7, and the accumulated pore pressure threshold value of the submarine landslide under different test conditions is researched.
The invention realizes a submarine landslide simulation system based on wave vibration, fully considers the important role of wave load in submarine landslide, overcomes the defects of theoretical calculation and numerical simulation, and can develop submarine landslide simulation tests under various combined working conditions based on the actual geological conditions and sea conditions of the submarine landslide.
The invention overcomes the defects of high test cost and long period of a large harbor basin, simplifies wave vibration load into simple harmonic vibration load, and transmits the simple harmonic vibration load through the combined use of the exciting plate 17 and the supporting spring 15, thereby realizing miniaturization and simplification of the test device and greatly improving the operability of the test device on the premise of not changing the mechanical essence.
According to the invention, through the combined use of the driving motor 8 and the spiral flywheel 7, the gesture of the simulated landslide body 11 is accurately adjustable within a certain range, so that the submarine landslide simulation test under different geological conditions can be conveniently carried out; the sliding plate 9 is internally provided with the air holes of the sliding plate 9, so that the accumulation of hole pressure on the contact surface of the sliding plate 9 and the simulated landslide body 11 is effectively avoided, and the accuracy of the simulation test is greatly improved.
The invention adopts the combined dynamic monitoring of the pore pressure monitor 12 and the displacement sensor 13, fully reflects the dynamic response of the simulated landslide body 11 under the action of wave load, and provides powerful data support for the research of the inoculation mechanism and the destruction mechanism of the submarine landslide.
Claims (5)
1. The submarine landslide simulation system based on wave vibration is characterized by comprising a frame supporting structure, a landslide simulation device, a wave simulation device and a landslide monitoring device, wherein the frame supporting structure comprises a glass container, the landslide simulation device comprises a simulation landslide body (11) and an inclination angle adjusting mechanism, the wave simulation device comprises an excitation plate (17) and an excitation driving mechanism, the excitation plate (17) is arranged at the top of the glass container through the excitation driving mechanism, the simulation landslide body (11) is arranged at the bottom of the glass container, the inclination angle adjusting mechanism is arranged below the simulation landslide body (11), the landslide monitoring device comprises a pore pressure monitor (12) and a displacement sensor (13), the pore pressure monitor (12) is embedded in the simulation landslide body (11), the displacement sensor (13) is arranged on the surface of the simulation landslide body (11), and the pore pressure monitor (12) and the displacement sensor (13) are used for monitoring and recording dynamic responses of the simulation landslide body (11);
The inclination angle adjusting mechanism comprises a spiral flywheel (7), a flywheel cross shaft (5), a driving motor (8) and a sliding plate (9), wherein the sliding plate (9) is arranged at the bottom of the simulated landslide body (11), a plurality of sliding plate bottom holes (10) penetrating through the upper surface and the lower surface of the sliding plate (9) are formed in the sliding plate (9), sliding plate air holes are formed in the sliding plate (9), the flywheel cross shaft (5) is transversely arranged at the bottom of the glass container and is positioned below the sliding plate (9), the spiral flywheel (7) is arranged on the flywheel cross shaft (5), the spiral flywheel (7) is propped against the lower part of the sliding plate (9), and the driving motor (8) drives the spiral flywheel (7) to rotate through the flywheel cross shaft (5);
the vibration excitation driving mechanism comprises a bracket beam (14), supporting springs (15), spring bolts (16) and a vibration motor (20), wherein the bracket beam (14) is arranged on the inner side of the glass container, the supporting springs (15) are arranged above the bracket beam (14), four corners of the vibration excitation plate (17) are arranged on the top ends of the supporting springs (15) and are connected with the supporting springs (15) through the spring bolts (16), and the vibration motor (20) is arranged on the top of the vibration excitation plate (17).
2. The seabed landslide simulation system based on wave vibration effect according to claim 1, wherein two parallel supporting beams (4) are arranged at the bottom of the glass container, a flywheel cross shaft (5) is transversely arranged between the two supporting beams (4), and the flywheel cross shaft (5) is provided with a cross shaft bolt (6) fixedly connected with the supporting beams (4).
3. The seabed landslide simulation system based on wave vibration according to claim 1, wherein a vibrating motor base plate (18) is arranged at the top of the exciting plate (17), the vibrating motor base plate (18) and the exciting plate (17) are fixedly connected through a plurality of base plate bolts (19), and a vibrating motor (20) is arranged on the vibrating motor base plate (18).
4. The seabed landslide simulation system based on wave vibration effect according to claim 1, wherein the frame supporting structure comprises supporting columns (1), supporting plates (2), glass containers and supporting beams (4), the supporting columns (1) are arranged at four corners of the supporting plates (2), organic glass (3) is arranged between the supporting columns (1) above the supporting plates (2) to form the glass containers, and two parallel supporting beams (4) are arranged above the supporting plates (2).
5. A method for simulating a submarine landslide based on wave vibration action, characterized in that it uses a submarine landslide simulation system based on wave vibration action according to any one of claims 1-4, and comprises the following steps:
Step 1, preparing a simulated landslide: uniformly mixing ISO standard sand, remolded clay and bentonite according to a certain mixing ratio, adding a proper amount of water, and fully stirring; according to the mode set by the test, the fully stirred soil materials are layered and piled into a simulated landslide body (11);
Step 2, monitoring equipment placement: in the layering and stacking process of the simulated landslide body (11), a pore pressure monitor (12) and a displacement sensor (13) are arranged according to the set positions of the test; after the simulated landslide body (11) is piled up, all monitoring equipment is connected with a host, initial monitoring data are debugged and obtained, and the integrity of the monitoring equipment is verified;
step 3, landslide posture adjustment: starting a driving motor (8) of the simulated landslide device, and rotating the spiral flywheel (7) to a proper position so that the sliding plate (9) is adjusted to a preset inclination angle;
step 4, vibration system installation: an excitation plate (17) of the wave simulation system is tightly screwed with a supporting spring (15) by adopting a spring bolt;
And 5, injecting water into the test equipment: injecting water into the test device, when the water level floods the simulated landslide body (11), controlling the water injection rate, so as to reduce the disturbance influence of the water injection process on the simulated landslide body (11), stopping water injection after the water level reaches a preset height, and standing for 48 hours;
Step 6, landslide process simulation: resetting monitoring data of all monitoring devices, starting a vibration motor of a wave simulation system, taking the starting time as a time 0 point, dynamically monitoring pore water pressure and displacement deformation conditions of each part of a simulated landslide body (11) in the test process through a pore pressure monitor (12) and a displacement sensor (13), and ending the test until reaching a preset test time or after the simulated landslide body (11) is unstable and damaged;
Step 7, monitoring data processing: establishing a time-displacement coordinate system by taking time as an abscissa and displacement as an ordinate, and drawing a monitoring data curve of a displacement sensor (13) in the time-displacement coordinate system, so as to study displacement deformation development conditions of different positions of a landslide body (11) under the action of wave load; establishing a time-pore pressure coordinate system by taking time as an abscissa and pore pressure as an ordinate, and drawing a monitoring data curve of a pore pressure monitor (12) in the time-pore pressure coordinate system, so as to study the accumulated distribution condition of pore water pressures at different positions of a simulated landslide body (11) under the action of wave load; identifying a time point t f of landslide instability according to a time-displacement curve, and obtaining pore water pressure p f corresponding to a time point t f in the time-pore pressure curve, namely simulating an accumulated pore pressure threshold value of a landslide body (11) under the test condition; in the wave load process, when the accumulated pore pressure in the seabed simulation landslide body (11) does not exceed a threshold value p f, instability damage does not occur; when the accumulated pore pressure in the seabed simulation landslide body (11) exceeds a threshold value p f, triggering the instability and damage of the seabed landslide;
Step 8, repeating the simulation test: according to the test requirement, the soil material mixing ratio, vibration load amplitude, vibration load frequency and the inclination angle influence factor of the sliding plate (9) can be changed, the test is repeatedly carried out according to the steps 1-7 again, and the accumulated pore pressure threshold value of the submarine landslide under different test conditions is researched.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010058372.5A CN111076895B (en) | 2020-01-19 | 2020-01-19 | Seabed landslide simulation system and test method based on wave vibration effect |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010058372.5A CN111076895B (en) | 2020-01-19 | 2020-01-19 | Seabed landslide simulation system and test method based on wave vibration effect |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN111076895A CN111076895A (en) | 2020-04-28 |
| CN111076895B true CN111076895B (en) | 2024-06-28 |
Family
ID=70323681
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010058372.5A Active CN111076895B (en) | 2020-01-19 | 2020-01-19 | Seabed landslide simulation system and test method based on wave vibration effect |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111076895B (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113702619B (en) * | 2021-07-26 | 2024-05-24 | 中国电建集团华东勘测设计研究院有限公司 | Submarine landslide evaluation method based on three-dimensional wave flow harbor basin test |
| CN114323554A (en) * | 2021-11-23 | 2022-04-12 | 国核电力规划设计研究院有限公司 | Submarine suspended cable wave-induced oscillation monitoring test device and monitoring method |
| CN114467560B (en) * | 2022-01-07 | 2022-12-16 | 三峡大学 | Water-level-fluctuating zone vegetation planting experimental device and method for simulating reservoir wave washing |
| CN118150809A (en) * | 2024-05-09 | 2024-06-07 | 江西省煤田地质勘察研究院 | Landslide geological disaster physical simulation test device and method |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN211904601U (en) * | 2020-01-19 | 2020-11-10 | 中国电建集团华东勘测设计研究院有限公司 | Seabed landslide simulation system based on wave vibration effect |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101532931B (en) * | 2009-04-17 | 2011-07-13 | 中国科学院武汉岩土力学研究所 | Experimental method of simulating dynamic and static load and device thereof |
| KR101376092B1 (en) * | 2013-02-13 | 2014-03-21 | 한국지질자원연구원 | Laboratory flume for examining water wave propagation due to submarine landslides |
| CN103353516B (en) * | 2013-05-27 | 2015-07-15 | 中国地质大学（武汉） | Large movable lateral uplifting composite lading slope physical model test apparatus |
| CN107367599A (en) * | 2017-09-01 | 2017-11-21 | 中国电建集团成都勘测设计研究院有限公司 | Water power reservoir area rock slope with along layer near cut Experimental mimic system |
| CN110398578A (en) * | 2019-06-17 | 2019-11-01 | 山东黄金矿业科技有限公司深井开采实验室分公司 | A kind of three-dimensional load different water cut landslide experimental rig |
-
2020
- 2020-01-19 CN CN202010058372.5A patent/CN111076895B/en active Active
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN211904601U (en) * | 2020-01-19 | 2020-11-10 | 中国电建集团华东勘测设计研究院有限公司 | Seabed landslide simulation system based on wave vibration effect |
Also Published As
| Publication number | Publication date |
|---|---|
| CN111076895A (en) | 2020-04-28 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN111076895B (en) | Seabed landslide simulation system and test method based on wave vibration effect | |
| Tjelta | Geotechnical aspects of bucket foundations replacing piles for the Europipe 16/11-E jacket | |
| Zhang et al. | Centrifuge modeling of suction bucket foundations for platforms under ice-sheet-induced cyclic lateral loadings | |
| CN115200815A (en) | Dynamic response testing device and testing method for seabed suction type three-barrel foundation | |
| Thevanayagam et al. | Laminar box system for 1-g physical modeling of liquefaction and lateral spreading | |
| CN111560973B (en) | Underwater pile-based multi-pile construction system | |
| Peng et al. | A device to cyclic lateral loaded model piles | |
| CN112227433B (en) | Model test device and test method for pile foundation bearing capacity during fault zone dislocation | |
| KR102092694B1 (en) | Shear Test Method and Equipment for Friction on Breakwater Cassion | |
| CN211904601U (en) | Seabed landslide simulation system based on wave vibration effect | |
| Sparrevik | Offshore wind turbine foundations state of the art | |
| CN104535738A (en) | Centrifugal model test lateral static force loading device and testing method | |
| Garcia | Assessment of Helical Anchors Bearing Capacity for Offshore Aquaculture Applications | |
| Sumer et al. | Pore pressure buildup in the subsoil under a caisson breakwater | |
| Yan et al. | Centrifuge performance of LCSM wall reinforced pile-supported wharf subjected to yard load-induced marine slope soil movement | |
| CN220768186U (en) | Testing device for multi-suction barrel combined foundation under earthquake and environmental load | |
| Xiao et al. | Experimental and numerical study on motion characteristics of a bucket foundation during immersion process | |
| Le et al. | Collision analysis between spudcan and seabed during the process of jack-up platform lowering jack-up legs | |
| Sakr et al. | Model study of jacked pile with varied geometry in sand | |
| CN116837848B (en) | Underwater multi-pile piling guide device and application method thereof | |
| Chen et al. | Influences of earthquake characteristics on seismic performance of anchored sheet pile quay with barrette piles | |
| Senner | Analysis of long term jack-up rig foundation performance | |
| Jamil et al. | Experimental study of comparison of settlement behavior of pile raft foundation with batter and vertical piles | |
| Otunyo | Design of offshore concrete gravity platforms | |
| Lu et al. | Simulation of dynamic loading in centrifuge modeling for suction bucket foundations |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |