CN112962686A - Centrifugal machine loading device for suction anchor out-of-plane test - Google Patents
Centrifugal machine loading device for suction anchor out-of-plane test Download PDFInfo
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- CN112962686A CN112962686A CN202110138630.5A CN202110138630A CN112962686A CN 112962686 A CN112962686 A CN 112962686A CN 202110138630 A CN202110138630 A CN 202110138630A CN 112962686 A CN112962686 A CN 112962686A
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D33/00—Testing foundations or foundation structures
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Abstract
The invention discloses a centrifuge loading device for a suction anchor out-of-plane test, which comprises a model suction anchor, a loading and out-of-plane adjusting system, a measuring system and a centrifuge model box, wherein a guide rod buckle is fixedly arranged at the contact position of a vertical guide rod of the loading and out-of-plane adjusting system and a guide groove, and a ball is arranged between the guide rod buckle and a top plate so as to reduce friction; vertical guide rod dog is fixed with on one side of the vertical guide rod, and vertical guide rod dog and play plane regulation servo motor's guide rod fixed connection, the motion accessible play plane of final vertical guide rod is adjusted servo motor and is carried out accurate control. The device can adjust different loading positions and outlet plane loading angles through the transverse outlet plane movement of the vertical guide rod, and can realize the loading test of any position and any outlet plane angle of the suction anchor.
Description
Technical Field
The invention belongs to the technical field of centrifugal tests, and relates to a centrifugal machine loading device for a suction anchor out-of-plane test. The device simulates the stress state of in-situ ocean soil through a centrifugal machine, can adjust different loading positions and out-of-plane loading angles through the transverse out-of-plane movement of the vertical guide rod, and can realize the loading test of any position and any out-of-plane angle of the suction anchor.
Background
The suction anchor is an important anchoring foundation type, is installed on the surface of a seabed in a suction penetration mode, is provided with a mooring point at a certain position and is connected with an upper floating body through an anchor chain or a steel strand so as to realize mooring and positioning of the upper floating body, and the foundation type plays an important role in a mooring system of a deep and shallow sea structure at present.
However, because the basic bearing capacity of the suction anchor is closely related to the size, soil condition and action angle of the anchor body, the current research on the bearing capacity of the suction anchor mainly focuses on the bearing capacity and movement in the plane of the suction anchor. In fact, due to the large-scale transverse movement of the upper floating body, the mooring line is driven to move together, the mooring line is no longer collinear with the central line of the suction anchor (namely, out-of-plane movement occurs), at the moment, the suction anchor is subjected to out-of-plane load, the bearing capacity is obviously reduced, however, at present, no experimental research on out-of-plane bearing capacity and movement characteristics of the suction anchor exists, and a corresponding experimental testing device is also lacked. Therefore, a set of test device capable of testing the bearing capacity of the suction anchor out of the plane is needed to be developed.
If the bearing capacity of the suction anchor is tested under the condition of normal gravity, the difference from the actual result is larger because the soil is a material related to the self-weight. In geotechnical engineering, the self-weight stress of soil generally dominates, the mechanical property of soil changes with the stress level, and the conventional small scale model cannot reproduce the property of a prototype because the self-weight stress is far lower than that of the prototype. The supergravity centrifugal model test compensates the dead weight loss of the geotechnical structure caused by the scale reduction of the model by enabling the model to bear the action of centrifugal acceleration higher than the gravity acceleration, thereby reproducing the characteristics of the prototype rock-soil body and structure. The soil body material in the hypergravity simulation can better reflect the characteristics of the prototype soil body such as the particle scattering property, the stress correlation, the friction characteristic, the strong nonlinearity, the shear expansion property, the heterogeneity, the stress history correlation and the like. The supergravity centrifugal model test is particularly effective in simulating the characteristics of rock-soil structures with dead weight as a main load, so that the supergravity centrifugal model test is widely applied.
The invention provides a centrifuge loading device for a suction anchor out-of-plane test, which can adjust different loading positions and out-of-plane loading angles through the transverse out-of-plane movement of a vertical guide rod, and can realize the loading test of any position and any out-of-plane angle of an anchor pile.
Disclosure of Invention
The invention provides a centrifuge loading device for testing the out-of-plane of a suction anchor, which is used for solving the problem of loading test at any position and any out-of-plane angle of the suction anchor in a centrifugal test. The device can adjust different loading positions and out-of-plane loading angles through the transverse out-of-plane movement of the vertical guide rod, and can realize the loading test of any position and any out-of-plane angle of the anchor pile.
The invention adopts the following technical scheme:
a centrifuge loading device for testing the out-of-plane of a suction anchor comprises a model suction anchor, a loading and out-of-plane adjusting system, a measuring system and a centrifuge model box; the upper part of the centrifuge model box is provided with a top plate, and soil is filled in the centrifuge model box; the model suction anchor is arranged in a centrifuge model box, and the model suction anchor is partially embedded in soil; the loading and out-of-plane adjusting system is used for loading the model suction anchor, and the measuring system is used for testing the horizontal displacement and the inclination angle of the model suction anchor in the loading process;
the model suction anchor comprises a steel pipe, a lateral guide groove and a shackle; the steel pipe is of a steel thin-wall cylindrical structure, the lateral guide grooves are arranged along the whole length of the side wall of the steel pipe, the anchor point fixing devices are arranged on the lateral guide grooves, each anchor point fixing device comprises two sets of bolt nuts, each shackle is arranged between the two sets of bolt nuts, each shackle in the middle is fixed by screwing the two bolts, and each shackle is connected with a steel strand; the anchor point fixing device can move up and down in the lateral guide groove to realize the adjustment of different loading positions;
the loading and out-of-plane adjusting system comprises an out-of-plane adjusting servo motor, a vertical guide rod and a loading servo motor; the outlet plane adjusting servo motor is fixed on the upper part of the top plate, and a guide groove is formed in the top plate and used for limiting the transverse outlet plane movement of the vertical guide rod; the initial loading direction of the suction anchor is the x direction, namely the central line of the steel strand and the anchor is superposed; the guide groove is vertical to the initial loading direction of the suction anchor, namely the y direction; a guide rod buckle is fixedly arranged at the position, in contact with the guide groove, of the vertical guide rod, and a ball is arranged between the guide rod buckle and the top plate so as to reduce friction; a vertical guide rod stop block is fixed on one side of the vertical guide rod and is fixedly connected with a guide rod of the out-plane adjusting servo motor, and finally the movement of the vertical guide rod can be accurately controlled through the out-plane adjusting servo motor; a pulley guide groove is formed in the inner side of the vertical guide rod, a direction control pulley is arranged in the pulley guide groove, and the position of the steel strand is adjusted by adjusting the position of the direction control pulley, so that the loading inclination angle is adjusted; the other end of the steel strand penetrates through the direction control pulley and then is connected to a loading servo motor, and the loading servo motor is fixed on the vertical guide rod and can move along with the transverse movement of the vertical guide rod.
In the above technical solution, further, the measuring system includes a rectangular box, 4 x-direction laser displacement sensors, 4 y-direction displacement sensors, and 1 bidirectional angle sensor; the cuboid box body is fixed at the top of the model suction anchor and is made of high-strength light aluminum alloy material; the 4 x-direction laser displacement sensors are fixed on the side wall of the centrifuge model box, are arranged on the side wall of the centrifuge model box at intervals of 10cm in a square shape and are symmetrically arranged along the center line of the anchor, and are used for measuring the horizontal x-direction displacement of four marking points on the cuboid box body; the 4 y displacement sensors are fixed on the side wall of the centrifuge model box, the 4 y displacement sensors are arranged in a square shape at intervals of 10cm on the side wall of the centrifuge model box and are symmetrically arranged along the center line of the anchor, the two-way angle sensor is used for measuring horizontal y displacement of four mark points on the cuboid box, the two-way angle sensor is arranged at the center of the top of the cuboid box and is used for measuring the inclination angles of the cuboid box along two directions x-z and y-z, and through the measuring system, the freedom degree of the model suction anchor can be captured. The high-strength light aluminum alloy material is 7075 aluminum alloy.
Furthermore, the lateral guide groove is welded on the side wall of the steel pipe.
Further, the guide rod buckle includes two parts that are located roof upper end and lower extreme respectively, and two parts all are equipped with the ball with roof contact site, and two parts all span the guide slot.
The invention has the following advantages:
the invention provides a centrifuge loading device for testing the out-of-plane of a suction anchor, which is used for solving the problem of loading test at any position and any out-of-plane angle of the suction anchor in a centrifugal test. The device can adjust different loading positions and outlet plane loading angles through the transverse outlet plane movement of the vertical guide rod, and can realize the loading test of any position and any outlet plane angle of the suction anchor.
Drawings
FIG. 1 is a front view of the present invention;
FIG. 2 is a top view of the present invention;
FIG. 3 is a detail front view of the model pile of the present invention;
FIG. 4 is a detailed top view of the model post of the present invention;
FIG. 5 is a detailed front view of the vertical guide of the present invention;
the device comprises a model suction anchor 1, a loading and plane-outlet adjusting system 2, a measuring system 3, a centrifuge model box 4, a steel pipe 5, a lateral guide groove 6, an anchor point fixing device 7, a shackle 8, a steel strand 9, a top plate 10, a plane-outlet adjusting servo motor 11, a guide groove 12, a vertical guide rod 13, a vertical guide rod stop 14, a pulley guide groove 15, a direction control pulley 16, a loading servo motor 17, a cuboid box 18, an x-direction laser displacement sensor 19, a y-direction displacement sensor 20, a bidirectional angle sensor 21, a guide rod buckle 22 and a ball 23.
Detailed Description
Fig. 1 shows a centrifuge loading device for testing the outlet plane of a suction anchor according to the present invention, which comprises a model suction anchor 1, a loading and outlet plane adjusting system 2, a measuring system 3 and a centrifuge model box 4; the upper part of the centrifuge model box 4 is provided with a top plate 10, and soil is filled in the centrifuge model box; the model suction anchor 1 is arranged in a centrifuge model box 4, and the model suction anchor 1 is partially embedded in soil; the loading and out-of-plane adjusting system 2 is used for loading the model suction anchor 1, and the measuring system 3 is used for testing the horizontal displacement and the inclination angle of the model suction anchor 1 in the loading process;
the model suction anchor 1 comprises a steel pipe 5, a lateral guide groove 6 and a shackle 8; the steel pipe 5 is of a steel thin-wall cylindrical structure, the lateral guide groove 6 is arranged along the through length of the side wall of the steel pipe 5, an anchor point fixing device 7 is arranged on the lateral guide groove, the anchor point fixing device 7 comprises two sets of bolt nuts, the shackle 8 is arranged between the two sets of bolt nuts, the shackle 8 in the middle is fixed by screwing the two bolts, and the shackle 8 is connected with a steel strand 9; the anchor point fixing device 7 can move up and down in the lateral guide groove 6 to realize the adjustment of different loading positions;
the loading and out-of-plane adjusting system 2 comprises an out-of-plane adjusting servo motor 11, a vertical guide rod 13 and a loading servo motor 17; the out-of-plane adjusting servo motor 11 is fixed on the upper part of the top plate 10, and the top plate 10 is provided with a guide groove 12 for limiting the transverse out-of-plane movement of the vertical guide rod 13; the initial loading direction of the suction anchor is the x direction, namely the central line of the steel strand and the anchor is superposed; the guide groove 12 is perpendicular to the initial loading direction of the suction anchor, namely the y direction; a guide rod buckle 22 is fixedly arranged at the contact position of the vertical guide rod 13 and the guide groove 12, and a ball is arranged between the guide rod buckle 22 and the top plate 10 to reduce friction; a vertical guide rod stop block 14 is fixed on one side of the vertical guide rod 13, the vertical guide rod stop block 14 is fixedly connected with a guide rod of the out-plane adjusting servo motor 11, and finally the movement of the vertical guide rod 13 can be accurately controlled through the out-plane adjusting servo motor 11; a pulley guide groove 15 is formed in the inner side of the vertical guide rod 13, a direction control pulley 16 is arranged in the pulley guide groove 15, and the position of the steel strand 9 is adjusted by adjusting the position of the direction control pulley 16, so that the loading inclination angle is adjusted; the other end of the steel strand 9 passes through the direction control pulley 16 and then is connected to a loading servo motor 17, and the loading servo motor 17 is fixed on the vertical guide rod 13 and can move along with the transverse movement of the vertical guide rod 13.
The measuring system 3 comprises a cuboid box 18, 4 x-direction laser displacement sensors 19, 4 y-direction displacement sensors 20 and 1 bidirectional angle sensor 21; the cuboid box 18 is fixed at the top of the model suction anchor 1 and is made of high-strength light aluminum alloy material; the 4 x-direction laser displacement sensors 19 are fixed on the side wall of the centrifuge model box 4, the 4 x-direction laser displacement sensors 19 are arranged on the side wall of the centrifuge model box 4 at intervals of 10cm in a square shape and symmetrically arranged along the center line of the anchor, and are used for measuring horizontal x-direction displacement of four marking points on the cuboid box body 18; the 4 y-direction displacement sensors 20 are fixed on the side wall of the centrifuge model box 4, the 4 y-direction displacement sensors 20 are arranged on the side wall of the centrifuge model box 4 at intervals of 10cm in a square shape and symmetrically arranged along the center line of the anchor, and are used for measuring the horizontal y-direction displacement of four mark points on the cuboid box 18, the bidirectional angle sensor 21 is arranged at the center of the top of the cuboid box 18 and is used for measuring the inclination angles of the cuboid box 18 along two directions x-z and y-z, and 6 degrees of freedom of the model suction anchor 1 can be captured through the measuring system.
The lateral guide groove 6 is welded on the side wall of the steel pipe 5.
The guide rod fastener 22 includes two parts respectively located at the upper end and the lower end of the top plate 10, the contact portions of the two parts and the top plate are both provided with balls, and the two parts both cross the guide groove 12.
Claims (4)
1. A centrifuge loading device for a suction anchor out-of-plane test is characterized by comprising a model suction anchor (1), a loading and out-of-plane adjusting system (2), a measuring system (3) and a centrifuge model box (4); a top plate (10) is arranged at the upper part of the centrifuge model box (4), and soil is filled in the top plate; the model suction anchor (1) is arranged in the centrifuge model box (4), and the model suction anchor (1) is partially embedded in soil; the loading and out-of-plane adjusting system (2) is used for loading the model suction anchor (1), and the measuring system (3) is used for testing the horizontal displacement and the inclination angle of the model suction anchor (1) in the loading process;
the model suction anchor (1) comprises a steel pipe (5), a lateral guide groove (6) and a shackle (8); the steel pipe (5) is of a steel thin-wall cylindrical structure, the lateral guide groove (6) is arranged along the through length of the side wall of the steel pipe (5), an anchor point fixing device (7) is arranged on the lateral guide groove, the anchor point fixing device (7) comprises two sets of bolt nuts, the shackle (8) is arranged between the two sets of bolt nuts, the shackle (8) in the middle is fixed by screwing the two bolts, and the shackle (8) is connected with a steel strand (9); the anchor point fixing device (7) can move up and down in the lateral guide groove (6) to realize the adjustment of different loading positions;
the loading and out-of-plane adjusting system (2) comprises an out-of-plane adjusting servo motor (11), a vertical guide rod (13) and a loading servo motor (17); the exit plane adjusting servo motor (11) is fixed on the upper part of the top plate (10), and a guide groove (12) is formed in the top plate (10) and used for limiting the transverse exit plane movement of the vertical guide rod (13); the initial loading direction of the suction anchor is the x direction, namely the central line of the steel strand and the anchor is superposed; the guide groove (12) is vertical to the initial loading direction of the suction anchor, namely the y direction; a guide rod buckle (22) is fixedly arranged at the contact position of the vertical guide rod (13) and the guide groove (12), and a ball is arranged between the guide rod buckle (22) and the top plate (10) to reduce friction; a vertical guide rod stop block (14) is fixed on one side of the vertical guide rod (13), the vertical guide rod stop block (14) is fixedly connected with a guide rod of the out-of-plane adjusting servo motor (11), and finally the movement of the vertical guide rod (13) can be accurately controlled through the out-of-plane adjusting servo motor (11); a pulley guide groove (15) is formed in the inner side of the vertical guide rod (13), a direction control pulley (16) is arranged in the pulley guide groove (15), and the position of the steel strand (9) is adjusted by adjusting the position of the direction control pulley (16), so that the loading inclination angle is adjusted; the other end of the steel strand (9) penetrates through the direction control pulley (16) and then is connected to a loading servo motor (17), and the loading servo motor (17) is fixed on the vertical guide rod (13) and can move along with the transverse movement of the vertical guide rod (13).
2. The centrifuge loading device for suction anchor out-of-plane testing of claim 1, wherein the measurement system (3) comprises a cuboid box (18), 4 x-direction laser displacement sensors (19), 4 y-direction displacement sensors (20) and 1 bidirectional angle sensor (21); the cuboid box body (18) is fixed at the top of the model suction anchor (1) and is made of high-strength light aluminum alloy material which is 7075 aluminum alloy; the 4 x-direction laser displacement sensors (19) are fixed on the side wall of the centrifuge model box (4), are arranged on the side wall of the centrifuge model box (4) at intervals of 10cm in a square shape and are symmetrically arranged along the center line of the anchor, and are used for measuring the horizontal x-direction displacement of four marking points on the cuboid box body (18); the 4 y-direction displacement sensors (20) are fixed on the side wall of the centrifuge model box (4), the 4 y-direction displacement sensors (20) are arranged on the side wall of the centrifuge model box (4) at intervals of 10cm in a square mode and are symmetrically arranged along the center line of the anchor and used for measuring horizontal y-direction displacement of four mark points on the cuboid box body (18), the bidirectional angle sensor (21) is arranged at the center of the top of the cuboid box body (18) and used for measuring inclination angles of the cuboid box body (18) along two directions x-z and y-z, and 6 degrees of freedom of the model suction anchor (1) can be captured through the measuring system.
3. The centrifuge loading device for suction anchor out-of-plane testing according to claim 1 wherein the lateral guide slots (6) are welded to the side walls of the steel tube (5).
4. The centrifuge loading apparatus for suction anchor out-of-plane testing according to claim 1 wherein the guide rod snap (22) comprises two parts at the upper and lower ends of the top plate (10) respectively, where the two parts contact the top plate, both provided with balls, and both spanning the guide slot (12).
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110138630.5A CN112962686A (en) | 2021-02-01 | 2021-02-01 | Centrifugal machine loading device for suction anchor out-of-plane test |
| PCT/CN2021/079869 WO2022160417A1 (en) | 2021-02-01 | 2021-03-10 | Centrifuge loading device for suction anchor out-of-plane test |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110138630.5A CN112962686A (en) | 2021-02-01 | 2021-02-01 | Centrifugal machine loading device for suction anchor out-of-plane test |
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| Publication Number | Publication Date |
|---|---|
| CN112962686A true CN112962686A (en) | 2021-06-15 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110138630.5A Pending CN112962686A (en) | 2021-02-01 | 2021-02-01 | Centrifugal machine loading device for suction anchor out-of-plane test |
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| CN (1) | CN112962686A (en) |
| WO (1) | WO2022160417A1 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113916515A (en) * | 2021-09-02 | 2022-01-11 | 孔剑桥 | Device for measuring performance of anchor component for marine facility culture |
| CN114524051A (en) * | 2022-03-18 | 2022-05-24 | 交通运输部广州打捞局 | Suction anchor azimuth angle adjusting method |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115977174B (en) * | 2023-01-05 | 2023-10-27 | 江苏科技大学 | Multidirectional loading test device and method for foundation model |
| CN116256267B (en) * | 2023-05-15 | 2023-08-01 | 微网优联科技(成都)有限公司 | Induction type complete machine testing device |
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2021
- 2021-02-01 CN CN202110138630.5A patent/CN112962686A/en active Pending
- 2021-03-10 WO PCT/CN2021/079869 patent/WO2022160417A1/en active Application Filing
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113916515A (en) * | 2021-09-02 | 2022-01-11 | 孔剑桥 | Device for measuring performance of anchor component for marine facility culture |
| CN114524051A (en) * | 2022-03-18 | 2022-05-24 | 交通运输部广州打捞局 | Suction anchor azimuth angle adjusting method |
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| Publication number | Publication date |
|---|---|
| WO2022160417A1 (en) | 2022-08-04 |
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Application publication date: 20210615 |