CN113916663A - Test device and test method for simulating drawing failure of seabed anchor plate in plane - Google Patents
Test device and test method for simulating drawing failure of seabed anchor plate in plane Download PDFInfo
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- CN113916663A CN113916663A CN202111431236.7A CN202111431236A CN113916663A CN 113916663 A CN113916663 A CN 113916663A CN 202111431236 A CN202111431236 A CN 202111431236A CN 113916663 A CN113916663 A CN 113916663A
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- 238000012360 testing method Methods 0.000 title claims abstract description 75
- 238000010998 test method Methods 0.000 title claims abstract description 12
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- 239000010959 steel Substances 0.000 claims abstract description 54
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- 239000011248 coating agent Substances 0.000 claims description 3
- 238000000576 coating method Methods 0.000 claims description 3
- 238000005429 filling process Methods 0.000 claims description 3
- 239000004746 geotextile Substances 0.000 claims description 3
- 238000009434 installation Methods 0.000 claims description 3
- 239000004576 sand Substances 0.000 claims description 3
- 239000012780 transparent material Substances 0.000 claims description 2
- XOOUIPVCVHRTMJ-UHFFFAOYSA-L zinc stearate Chemical compound [Zn+2].CCCCCCCCCCCCCCCCCC([O-])=O.CCCCCCCCCCCCCCCCCC([O-])=O XOOUIPVCVHRTMJ-UHFFFAOYSA-L 0.000 claims 1
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- 230000009286 beneficial effect Effects 0.000 description 3
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- G—PHYSICS
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- 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
- G01N3/08—Investigating strength properties of solid materials by application of mechanical stress by applying steady tensile or compressive forces
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- 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
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- G—PHYSICS
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- 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
- G01N3/06—Special adaptations of indicating or recording means
- G01N3/068—Special adaptations of indicating or recording means with optical indicating or recording means
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/0001—Type of application of the stress
- G01N2203/0003—Steady
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- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/0014—Type of force applied
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- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/003—Generation of the force
- G01N2203/0032—Generation of the force using mechanical means
- G01N2203/0037—Generation of the force using mechanical means involving a rotating movement, e.g. gearing, cam, eccentric, or centrifuge effects
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- G—PHYSICS
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- G01N2203/0058—Kind of property studied
- G01N2203/0069—Fatigue, creep, strain-stress relations or elastic constants
- G01N2203/0075—Strain-stress relations or elastic constants
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- G—PHYSICS
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- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/02—Details not specific for a particular testing method
- G01N2203/026—Specifications of the specimen
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- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/02—Details not specific for a particular testing method
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- G01N2203/0641—Indicating or recording means; Sensing means using optical, X-ray, ultraviolet, infrared or similar detectors
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/02—Details not specific for a particular testing method
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- G01N2203/067—Parameter measured for estimating the property
- G01N2203/0682—Spatial dimension, e.g. length, area, angle
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Abstract
The invention relates to the field of anchor plate experiments, in particular to a test device and a test method for simulating drawing failure of a seabed anchor plate in a plane, wherein the test device for simulating drawing failure of the seabed anchor plate comprises a support frame, a model box and a winch, the support frame comprises a horizontal top plate and a vertical support plate, a longitudinal sliding rail is arranged in a longitudinal slit, a pulley assembly is matched on the longitudinal sliding rail in a sliding manner, a steel strand led out by the winch passes through the longitudinal slit and then sequentially bypasses the first pulley assembly and the second pulley assembly to be connected with the anchor plate, and the first pulley assembly and the horizontal top plate are relatively fixed. The test device for the drawing failure of the submarine anchor plate can realize the vertical drawing test and the inclined drawing test of the anchor plate, disclose the anchor plate damage modes and the uplift bearing capacity exertion mechanism under different embedding angles, obtain the influence rule and exertion process of anchor plate embedding parameters and soil property parameters on the ultimate uplift bearing capacity of the anchor plate, and achieve the purpose of guiding the engineering design of the anchor plate.
Description
Technical Field
The invention relates to the field of anchor plate experiments, in particular to a test device and a test method for simulating drawing failure of a seabed anchor plate in a plane.
Background
The anchor plate foundation has the advantages of simple structure, convenient construction, good economy and the like, so the anchor plate foundation is widely applied to projects such as side slopes, retaining walls, signal towers and the like. In particular, in recent years, the marine economy of China is rapidly developed, a large amount of marine engineering represented by marine drilling platforms, submarine oil and gas pipelines and the like is built, anchor plate foundations are commonly adopted in the engineering, and new anchor plates such as suction anchors, penetration anchors, normal bearing anchors and the like are developed. As a pull-type member, the anchor plate provides primarily resistance to pull-out in the direction of the pull rod. Taking an ocean drilling platform as an example, the working principle of the anchor plate is as follows: under the action of seawater buoyancy, the marine drilling platform generally shows a vertical drawing trend, the drawing force on the marine drilling platform is transmitted to the lower deeply-buried anchor plate through the pull rod connected with the marine drilling platform, and then is dispersed to the surrounding seabed through the anchor plate, so that the effect of anchoring the upper marine drilling platform to the seabed is achieved. The exertion of the anti-pulling force of the anchor plate is closely related to the embedding angle. For example, when the anchor plate is horizontally buried, the anchor plate provides vertical uplift resistance for the structure; when vertically buried, it provides horizontal uplift force for the structure, when buried between the two, then provides horizontal and vertical uplift force simultaneously. Therefore, the determination of the ultimate uplift bearing capacity under different embedding angles based on the stress characteristics of the structure is the key of the anchor plate engineering design.
But at present, the study on the uplift bearing capacity of the anchor plate under different burying angles (particularly inclined burying) is relatively rare. Especially, when the embedding angle changes, the drawing failure mechanism of the anchor plate and the relation between the drawing failure mechanism and the geometric dimension and the appearance of the anchor plate, the soil characteristics around the anchor plate and the like are not clear, and the popularization and the application of the anchor plate foundation in projects with complicated stress are limited. Therefore, it is necessary to develop an in-depth study of the uplift bearing capacity of the anchor plate under different burying angles. Because the process is clear and intuitive, and the result is real and reliable, the indoor model test becomes the most common means for the research. The test research must have with plan to carry out the test device that experimental operating mode assorted, but current anchor slab draws test device and still does not have this kind of ability, and concrete not enough shows:
(1) the existing test device is only designed for the specific working condition of horizontal or vertical embedding, and the anchor plate drawing test under any embedding angle cannot be realized;
(2) the existing design idea is used, only an anchor plate drawing test device capable of developing a certain specific embedding inclination angle can be obtained, the pulling resistance bearing capacity of the anchor plate and the law analysis of the exertion mechanism of the pulling resistance bearing capacity under different embedding angles are not convenient to carry out, and due to the fact that the test devices are different, namely the control variable is not unique, the obtained test data of all working conditions are not comparable.
Disclosure of Invention
The invention aims to: aiming at the prior art, the method comprises the following steps: the existing test device can not test the anchor plate in an inclined drawing manner, and the test device and the test method for simulating the drawing failure of the submarine anchor plate in a plane can perform the inclined drawing test of the anchor plate, so that the damage mode and the uplift bearing capacity exertion mechanism of the anchor plate under different embedding angles can be disclosed, the influence rule and the exertion process of anchor plate embedding parameters and soil property parameters on the ultimate uplift bearing capacity of the anchor plate can be obtained, and the purpose of guiding the engineering design of the anchor plate can be achieved.
In order to achieve the purpose, the invention adopts the technical scheme that:
a test device for simulating drawing failure of a seabed anchor plate in a plane comprises a support frame, a model box and a winch, wherein a soil sample is placed in the model box, the anchor plate is embedded in the soil sample, the support frame comprises a horizontal top plate and a vertical support plate for supporting the horizontal top plate, the model box is positioned below the horizontal top plate, a longitudinal slit penetrating through the horizontal top plate is horizontally arranged on the horizontal top plate, one end of the longitudinal slit penetrates through one side of the horizontal top plate, a longitudinal sliding rail is horizontally arranged in the longitudinal slit, at least two pulley assemblies are in sliding fit on the longitudinal sliding rail, the two pulley assemblies are respectively defined as a first pulley assembly and a second pulley assembly, the winch is connected to the top of the horizontal top plate, a steel strand led out by the winch sequentially bypasses the first pulley assembly and the second pulley assembly after penetrating through the longitudinal slit and then is connected with the anchor plate, the sheave assembly can be fixed relative to the horizontal top plate.
The application discloses a test device for simulating drawing failure of an in-plane seabed anchor plate, a longitudinal slit penetrating through a horizontal top plate is horizontally arranged on the horizontal top plate, one end of the longitudinal slit penetrates through one side of the horizontal top plate, a longitudinal sliding rail is arranged in the longitudinal slit, so that pulley assemblies can be installed into the longitudinal slit and are in sliding fit with the longitudinal sliding rail, at least two pulley assemblies are arranged on the longitudinal sliding rail in an auxiliary mode, during testing, a first pulley assembly and a second pulley assembly are arranged at a target position firstly, then the first pulley assembly and the second pulley assembly are both fixed relative to the horizontal top plate, during testing at other angles, the second pulley assembly and the horizontal top plate are loosened relatively, the position is changed through the sliding fit of the second pulley assembly and the longitudinal sliding rail, and then the second pulley assembly and the horizontal top plate are fixed relatively, the method is used for realizing the vertical drawing test and the inclined drawing test of the anchor plate, thereby revealing the anchor plate damage modes and the uplift bearing capacity exertion mechanism under different embedding angles, and obtaining the influence rule and exertion process of the anchor plate embedding parameters and soil property parameters on the ultimate uplift bearing capacity of the anchor plate so as to achieve the purpose of guiding the engineering design of the anchor plate.
Preferably, the pulley assembly comprises a first pulley in sliding fit with the longitudinal sliding rail, a first pulley frame is connected to the lower end of the first pulley, a pulley is arranged on the first pulley frame, a first screw rod is connected to the upper end of the first pulley, the first screw rod penetrates through the longitudinal slot and is fixed to the upper surface of the horizontal top plate through a first base plate and a first nut, and when the pulley assembly and the horizontal top plate are fixed relatively, the first base plate and the first pulley frame clamp the horizontal top plate from two sides of the horizontal top plate.
Preferably, the third pulley assembly is connected to the side wall of the model box and can be vertically matched with the side wall in a sliding mode along the side wall, the third pulley assembly can be fixed relative to the side wall, and a steel strand led out by the winch passes through the longitudinal slot and then sequentially bypasses the first pulley assembly, the second pulley assembly and the third pulley assembly and then is connected with the anchor plate.
Preferably, a vertical seam penetrating through the side wall is vertically arranged on the side wall of the model box, the lower end of the vertical seam corresponds to the maximum embedding depth of the anchor plate, vertical sliding rails are arranged on two sides of the vertical seam, the third pulley assembly comprises a second pulley frame, a second pulley is connected onto the second pulley frame, the second pulley is in sliding fit with the vertical sliding rails, a second screw and a third pulley are connected onto the second pulley frame, one end of the second screw penetrates through the vertical seam and is fixed on the side wall through a second base plate and a second nut, and when the third pulley assembly and the side wall are relatively fixed, the second base plate and the second pulley frame clamp the side wall from two sides of the thickness of the side wall.
The third pulley assembly is arranged on the side wall of the model box, and during testing, the steel strand led out by the winch penetrates through the longitudinal slit and then sequentially bypasses the first pulley assembly and the second pulley assembly and then is connected with the anchor plate, or the steel strand led out by the winch penetrates through the longitudinal slit and then sequentially bypasses the first pulley assembly, the second pulley assembly and the third pulley assembly and then is connected with the anchor plate, so that the horizontal drawing test, the vertical drawing test and the inclined drawing test of the anchor plate are realized, the anchor plate damage modes and the uplift bearing capacity exertion mechanism under different embedding angles are disclosed, the influence rule and the exertion process of the anchor plate embedding parameters and the soil property parameters on the ultimate uplift bearing capacity of the anchor plate can be obtained, and the purpose of guiding the engineering design of the anchor plate is achieved.
Preferably, the bottom of the vertical supporting plate is provided with a vertical hole, and the vertical hole is matched with a first expansion nut for fixing the vertical supporting plate on the ground.
The invention also discloses a test method for simulating the drawing failure of the in-plane seabed anchor plate, and based on the test device for simulating the drawing failure of the in-plane seabed anchor plate, the specific operation steps are as follows:
s1, vertically placing the vertical supporting plate in a test site, and fixing the vertical supporting plate on the ground surface by an expanded first nut;
s2, erecting the horizontal top plate along the side edge, enabling the longitudinal slotted open end to face upwards, sequentially sliding the second pulley assembly and the first pulley assembly into the longitudinal sliding rail from the longitudinal slotted open end, and then placing the horizontal top plate into the mortise of the vertical supporting plate through the dovetail joint;
s3, after the vertical supporting plate and the horizontal top plate are spliced, fixing the winch on one side, close to the longitudinal slotted opening end, of the upper surface of the horizontal top plate, and enabling a steel strand of the winch to penetrate through the slotted opening;
s4, placing the model box below a support frame;
s5, arranging a second pulley which is connected into a whole by a second pulley frame in the vertical sliding track, screwing a second screw rod into a screw hole of the second pulley frame, and completing the installation of a third pulley assembly;
s6, install first loose pulley assembly under the hoist goes out the rope for the hoist goes out the rope direction and is vertical, and defines the pulley on the first loose pulley assembly and be the fourth pulley, and the pulley on the second loose pulley assembly is the fifth pulley:
after the steel strand is taken out of the winch, the steel strand sequentially winds around a fourth pulley and a fifth pulley and then is connected with an anchor plate, and a force displacement sensor is connected between a pull rod of the anchor plate and the steel strand;
or
After being taken out of the winch, the steel strand is sequentially wound around a fourth pulley, a fifth pulley and a third pulley and then is connected with an anchor plate, and a force displacement sensor is connected between a pull rod of the anchor plate and the steel strand;
s7, filling the soil sample into the model box by adopting a rain method, placing the anchor plate with the pull rod on the surface of the soil sample and fixing when the filling height is level with the embedding depth of the anchor plate, then continuously filling the soil sample, and plugging the vertical seam by using geotextile in the filling process to prevent soil leakage;
s8, in order to observe the lateral deformation of the soil sample, coating a layer of colored sand on the inner side of the front wall of the mold box every time a certain height is filled, and stopping filling the soil when the soil sample is filled to the specified height;
s9, arranging a first camera and a laser displacement sensor on the side wall of the model box, erecting a second camera right in front of the front wall of the model box, wherein,
the first camera is used for capturing deformation of the upper surface part of the soil sample in the rope winding process of the winch;
the laser displacement sensor is used for capturing the displacement of the upper surface part of the soil sample in the rope winding process of the winch;
the front wall of the model box is made of transparent material;
the second camera is used for catching the deformation of the colored sand part on the front side surface of the soil sample in the rope winding process of the winch.
Preferably, in step S6, the relative positions of the fifth pulley and the third pulley satisfy the following relationship:
(a) when the anchor plate is horizontally embedded, after the horizontal position of the anchor plate is determined, the position of the fifth pulley is adjusted, the left side of the wheel track of the fifth pulley is tangent to the steel strand, and then the fifth pulley is fixed on the horizontal top plate;
(b) when the anchor plate is vertically embedded, after the vertical position of the anchor plate is determined, the position of a third pulley is adjusted, the lower side of a wheel rail of the third pulley is tangent to the steel strand, then the third pulley is fixed on the left side wall of the model box, and the vertical position of a fifth pulley is consistent with that of the third pulley;
(c) when the anchor plate is buried underground with certain inclination, define inclination theta as the contained angle between the steel strand wires of being connected with the anchor plate and the vertical, inclination theta' is when the third pulley removes to vertical slip track topmost, the contained angle between the steel strand wires of being connected with the anchor plate and the vertical, and the relative position of fifth pulley and third pulley is:
c 1: when theta is more than 0 degree and less than or equal to theta', the fifth pulley is fixed on the left side L of the fourth pulley through the first base plate and the first nutccTherein is disclosed
Lcc＝Htanθ-R/sinθ+R，
The third pulley is not active and its position is not required;
c 2: when theta is less than or equal to 90 degrees, the model is usedSetting the upper edge of the left side wall of the box as an initial position, and fixing the third pulley below the initial positioncTherein is disclosed
Hc＝(H-h1)-(Lcm+tm+Lma)tanθ，
The vertical position of the fifth pulley is consistent with that of the third pulley; here, the
In the above formula, h1The distance h from the geometric center of the fifth pulley to the upper edge of the model box2Is the distance h from the center of gravity of the anchor plate to the upper surface of the soil sample3Is the height of the soil sample, h4Height of the inside of the mold box, taR is the fourth sheave radius, the fourth, fifth and third sheaves have the same diameter, L' is the horizontal distance of the fifth sheave when θ is 0 ° relative to the fifth sheave when θ is 0 °, LcmIs the horizontal distance from the geometric center of the third pulley to the outer side of the left side wall of the model box, tmIs the thickness of the left side wall of the model box, LmaThe horizontal distance from the inner side of the left side wall of the model box to the gravity center of the anchor plate.
According to the test method for simulating the drawing failure of the in-plane seabed anchor plate, the anchor plate is drawn at any preset angle (0-90 degrees) by designing the supporting frame and the model box, arranging the sliding rails and the pulleys on the top of the supporting frame and the side wall of the model box and arranging the vertical slits on the side wall of the model box; the front wall of the model box is made of transparent toughened glass and is preset with positioning mark points, and the right side wall and the front wall are additionally provided with a camera and a laser displacement sensor, so that the motion trail of the anchor plate and the deformation and damage forms of the soil sample can be accurately captured in real time; the drawing angle setting mode is flexible, the testing device is uniform, the testing expenditure is saved, and the ultimate drawing bearing capacity of the anchor plate, the drawing failure mechanism and the change rule of the ultimate drawing bearing capacity can be more accurately obtained.
In summary, due to the adoption of the technical scheme, the invention has the beneficial effects that:
1. the application discloses a test device for simulating drawing failure of a seabed anchor plate in a plane, wherein a longitudinal slit penetrating through a horizontal top plate is horizontally arranged on the horizontal top plate, one end of the longitudinal slit penetrates through one side of the horizontal top plate, a longitudinal sliding rail is arranged in the longitudinal slit, so that pulley assemblies can be installed into the longitudinal slit and are in sliding fit with the longitudinal sliding rail, at least two pulley assemblies are arranged on the longitudinal sliding rail in an auxiliary manner, during the test, a first pulley assembly and a second pulley assembly are arranged at a target position firstly, then the first pulley assembly and the second pulley assembly are both fixed relative to the horizontal top plate, during the test at other angles, the second pulley assembly and the horizontal top plate are loosened relatively, and the position is changed through the sliding fit of the second pulley assembly and the longitudinal sliding rail, and then the second pulley assembly and the horizontal top plate are relatively fixed to realize the vertical drawing test and the inclined drawing test of the anchor plate, so that the anchor plate damage modes and the uplift bearing capacity exertion mechanism under different embedding angles are disclosed, and the influence rule and the exertion process of the anchor plate embedding parameters and the soil property parameters on the ultimate uplift bearing capacity of the anchor plate can be obtained to achieve the aim of guiding the engineering design of the anchor plate.
2. The application the test device that the simulation in-plane seabed anchor plate drawed inefficacy, through setting up the third loose pulley assembly on the lateral wall of mold box, when experimental, the steel strand wires that the hoist was drawn are connected with the anchor slab after passing and vertically slotting in proper order around first loose pulley assembly and second loose pulley assembly, perhaps the steel strand wires that the hoist was drawn are connected with the anchor slab after passing and vertically slotting in proper order around first loose pulley assembly, second loose pulley assembly and third loose pulley assembly to realize anchor slab level and draw the experiment with the slope, thereby reveal anchor slab failure mode and resistance to plucking bearing capacity performance mechanism under the different angle of burying underground, and can obtain anchor slab embedding parameter and soil property parameter to the influence law and the performance process of anchor slab limit resistance to plucking bearing capacity, in order to reach the mesh of guiding anchor slab engineering design.
3. According to the test method for simulating the drawing failure of the in-plane seabed anchor plate, the anchor plate is drawn at any preset angle (0-90 degrees) by designing the supporting frame and the model box, arranging the sliding rails and the pulleys on the top of the supporting frame and the side wall of the model box and arranging the vertical slits on the side wall of the model box; the front wall of the model box is made of transparent toughened glass and is preset with positioning mark points, and the right side wall and the front wall are additionally provided with a camera and a laser displacement sensor, so that the motion trail of the anchor plate and the deformation and damage forms of the soil sample can be accurately captured in real time; the drawing angle setting mode is flexible, the testing device is uniform, the testing expenditure is saved, and the ultimate drawing bearing capacity of the anchor plate, the drawing failure mechanism and the change rule of the ultimate drawing bearing capacity can be more accurately obtained.
Drawings
FIG. 1 is a front view of the structure of a test device for simulating in-plane pulling failure of a subsea anchor plate according to the present invention (the steel strand passes around a fourth pulley and a fifth pulley, the fifth pulley being located directly above the anchor plate).
FIG. 2 is a front view of the structure of a test device for simulating in-plane pulling failure of a subsea anchor plate according to the present invention (the steel strand passes around a fourth pulley and a fifth pulley, the fifth pulley being located diagonally above the anchor plate).
FIG. 3 is a schematic structural front view of a test device for simulating in-plane pulling failure of a submarine anchor plate according to the present invention (the steel strand passes around the fourth pulley, the fifth pulley and the third pulley, and the third pulley is located obliquely above the anchor plate).
FIG. 4 is a schematic structural front view of a test device for simulating in-plane pulling failure of a seabed anchor plate (steel strands are wound around a fourth pulley, a fifth pulley and a third pulley, and the fifth pulley and the third pulley are arranged in a collinear way with the anchor plate) according to the invention.
FIG. 5 is a schematic structural front view of a test device for simulating in-plane pulling failure of a subsea anchor plate according to the present invention (the steel strand passes around the fourth and fifth pulleys and the third pulley, and the pulley assembly is located on the horizontal left side of the anchor plate).
FIG. 6 is a schematic top view of the test device for simulating in-plane pulling failure of the seabed anchor plate according to the present invention.
FIG. 7 is a schematic view of a vertical cut-away left view of a test device for simulating in-plane subsea anchor plate pull-out failure in accordance with the present invention.
Fig. 8 is an enlarged view of the portion a of fig. 7 according to the present invention.
Figure 9 is a schematic of the construction of the sheave assembly of the present invention.
In the figure: 1-a support frame; 2-a model box; 3-vertical supporting plates; 4-a horizontal top plate; 5-a winch; 6-longitudinal sliding track; 7-a first pulley; 8-a second nut; 9-a first screw; 10-a first backing plate; 11-a first nut; 12-vertical glide tracks; 13-anchor plate; 14-soil sample; 15-longitudinal slotting; 16-a first sheave frame; 17-steel strand wires; 18-a third sheave assembly; 19-a side wall; 20-vertical slotting; 21-a first sheave assembly; 22-a second sheave assembly; 23-a second sheave frame; 24-a second pulley; 25-a second backing plate; 26-a fourth pulley; 27-a fifth pulley; 28-third pulley, 29-second screw.
Detailed Description
The present invention will be described in detail below with reference to the accompanying drawings.
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
Example 1
As shown in fig. 1-9, the test apparatus for simulating in-plane seabed anchor plate pulling failure according to this embodiment includes a support frame 1, a model box 2, a winch 5, and a third pulley assembly 18, a soil sample 14 is placed in the model box 2, an anchor plate 13 is buried in the soil sample 14, the support frame 1 includes a horizontal top plate 4 and a vertical support plate 3 for supporting the horizontal top plate 4, the model box 2 is located below the horizontal top plate 4, a longitudinal slit 15 penetrating through the horizontal top plate 4 is horizontally arranged on the horizontal top plate 4, one end of the longitudinal slit 15 penetrates through one side of the horizontal top plate 4, a longitudinal sliding rail 6 is horizontally arranged in the longitudinal slit 15, at least two pulley assemblies are slidably fitted on the longitudinal sliding rail 6, wherein the two pulley assemblies are respectively defined as a first pulley assembly 21 and a second pulley assembly 22, the winch 5 is connected to the top of the horizontal top plate 4, the steel strand 17 led out from the winch 5 penetrates through the longitudinal slit 15 and then sequentially bypasses the first pulley assembly 21 and the second pulley assembly 22 to be connected with the anchor plate 13, the first pulley assembly 21 and the second pulley assembly 22 can be fixed relative to the horizontal top plate 4, and the upper part of the model box 2 is open.
The pulley assembly comprises a first pulley 7 in sliding fit with a longitudinal sliding rail 6, a first pulley frame 16 is connected to the lower end of the first pulley 7, pulleys are arranged on the first pulley frame 16, a first screw 9 is connected to the upper end of the first pulley 7, the first screw 9 penetrates through the longitudinal slot 15 and is fixed to the upper surface of the horizontal top plate 4 through a first base plate 10 and a first nut 11, when the pulley assembly and the horizontal top plate 4 are fixed relatively, the first base plate 10 and the first pulley frame 16 clamp the horizontal top plate 4 from two sides of the horizontal top plate 4, and a third pulley assembly 18 is connected to a side wall 19 of the model box 2 and can be in sliding fit with the side wall 19 along the vertical direction of the side wall 19.
The third pulley assembly 18 can be fixed relative to the side wall 19, and the steel strand 17 led out from the winch 5 passes through the longitudinal slit 15 and then sequentially bypasses the first pulley assembly 21, the second pulley assembly 22 and the third pulley assembly 18 to be connected with the anchor plate 13. A vertical slit 20 penetrating through the side wall 19 is vertically arranged on the side wall 19 of the mold box 2, the lower end of the vertical slit 20 corresponds to the maximum embedding depth of the anchor plate 13, vertical sliding rails 12 are arranged on both sides of the vertical slit 20, the third pulley assembly 18 comprises a second pulley frame 23, a second pulley 24 is connected to the second pulley frame 23, the second pulley 24 is in sliding fit with the vertical sliding rails 12, the second pulley frame 23 is connected with a second screw 29 and a third pulley 28, one end of the second screw 29 penetrates through the vertical slit 20 and is fixed on the side wall 19 through a second backing plate 25 and a second nut 8, and when the third pulley assembly 18 is fixed relative to the side wall 19, the second backing plate 25 and the second pulley frame 23 clamp the side wall 19 from both sides of the thickness of the side wall 19.
Through arranging the third pulley assembly 18 on the side wall 19 of the model box 2, during testing, the steel strand 17 led out by the winch 5 passes through the longitudinal slit 15 and then sequentially bypasses the first pulley assembly 21 and the second pulley assembly 22 to be connected with the anchor plate 13, or the steel strand 17 led out by the winch 5 passes through the longitudinal slit 15 and then sequentially bypasses the first pulley assembly 21, the second pulley assembly 22 and the third pulley assembly 18 to be connected with the anchor plate 13, so that the horizontal drawing test, the vertical drawing test and the inclined drawing test of the anchor plate 13 are realized, the damage modes and the uplift bearing capacity exertion mechanism of the anchor plate 13 under different embedding angles are disclosed, and the influence rule and exertion process of the embedding parameters and the soil property parameters of the anchor plate 13 on the ultimate uplift bearing capacity of the anchor plate 13 can be obtained, so as to achieve the purpose of guiding the engineering design of the anchor plate 13.
The bottom of the vertical supporting plate 3 is provided with a vertical hole, and the vertical hole is matched with a first expansion nut 11 which is used for fixing the vertical supporting plate 3 on the ground.
The beneficial effects of this embodiment: the application discloses a test device for simulating drawing failure of a seabed anchor plate in a plane, a longitudinal slit 15 penetrating through a horizontal top plate 4 is horizontally arranged on the horizontal top plate 4, one end of the longitudinal slit 15 penetrates through one side of the horizontal top plate 4, a longitudinal sliding rail 6 is arranged in the longitudinal slit 15, so that a first pulley assembly 21 and a second pulley assembly 22 can be installed into the longitudinal slit 15 and are in sliding fit with the longitudinal sliding rail 6, at least two first pulley assemblies are arranged on the longitudinal sliding rail 6 in an auxiliary mode, during testing, the first pulley assembly 21 and the second pulley assembly 22 are firstly arranged at target positions, then the first pulley assembly and the horizontal top plate 4 are relatively fixed, during testing at other angles, the second pulley assembly 22 is relatively loosened from the horizontal top plate 4 and is in sliding fit with the longitudinal sliding rail 6 through the second pulley assembly 22, and changing the position, and then relatively fixing the second pulley assembly 22 and the horizontal top plate 4 to realize the vertical drawing test and the inclined drawing test of the anchor plate 13, thereby revealing the damage mode and the uplift bearing capacity exertion mechanism of the anchor plate 13 under different embedding angles, and obtaining the influence rule and the exertion process of the embedding parameters and the soil property parameters of the anchor plate 13 on the ultimate uplift bearing capacity of the anchor plate 13 so as to achieve the purpose of guiding the engineering design of the anchor plate 13.
Example 2
As shown in fig. 1-9, the test device for simulating the drawing failure of the in-plane seabed anchor plate according to the embodiment comprises a support frame 1 and a model box 2;
the supporting frame 1 comprises a vertical supporting plate 3 and a horizontal top plate 4, the vertical supporting plate 3 is an inverted T-shaped hollow steel plate and is used for supporting the horizontal top plate 4, and the horizontal top plate 4 is a straight hollow steel plate and is used for adjusting the drawing direction of an anchor plate 13 and fixing a winch 5;
the bottom of the vertical supporting plate 3 is provided with a vertical hole so as to fix the vertical supporting plate 3 on the ground by expanding a first nut 11;
a winch 5 for applying driving force is arranged on the right side of the upper surface of the horizontal top plate 4, a longitudinal sliding rail 6 is arranged on the lower surface by taking the right end as a starting point, and a longitudinal slit 15 penetrating through the upper surface of the horizontal top plate 4 is preset right above the rail;
four first pulleys 7 capable of translating freely are arranged in the longitudinal sliding track 6, the lower ends of the first pulleys 7 are connected with the pulleys, the upper ends of the first pulleys 7 are connected with first screws 9, the first screws 9 penetrate through the longitudinal slits, and a first base plate 10 and first nuts 11 are fixed on the upper surface of the horizontal top plate 4;
the steel strand of the winch 5 penetrates through the longitudinal slit 15 and is placed in a concave guide rail of a fourth pulley 26, a fifth pulley 27 and a third pulley 28;
the vertical supporting plate 3 and the horizontal top plate 4 are connected in a mortise mode, a mortise is arranged at the upper part of the vertical supporting plate 3, and a dovetail tenon matched with the mortise is arranged at the end part of the horizontal top plate 4;
the model box 2 is positioned inside the support frame 1 and comprises a left side wall, a right side wall, a front wall, a rear wall and a bottom plate, and the box body with an open top is sealed between the side walls and the bottom plate through rivets;
a vertical slit 20 which completely penetrates is formed in the longitudinal symmetrical axis of the left side wall 19, so that the steel strand of the winch 5 can penetrate through the vertical slit 20, the starting point of the vertical slit 20 is consistent with the corresponding position of the maximum embedding depth of the anchor plate 13, and the end point is the upper edge of the left side wall 19;
taking a longitudinal symmetry axis as a boundary, two vertical sliding tracks 12 are arranged on the outer side of the left side wall 19, the specifications of the vertical sliding tracks 12 are the same as those of the longitudinal sliding tracks 6, and the starting point and the stopping point are consistent with those of the vertical slit 20;
the vertical sliding tracks 12 are respectively provided with a second pulley 24, the pulleys in the vertical sliding tracks 12 are connected into a whole by adopting a steel plate, the geometric center of the steel plate is provided with a screw hole and a second screw 29 is penetrated through, the left end of the second screw 29 is connected with a third pulley 28, and the right end of the second screw passes through the vertical slit 20, so that the third pulley 28 is fixed at the appointed position of the appointed left side wall 19;
a high-definition camera is arranged at the middle point of the upper edge of the right side wall, and two laser displacement sensors are arranged on two sides of the high-definition camera and are respectively used for capturing the surface damage form and displacement of the soil sample in the model box 2;
the front side wall is made of transparent toughened glass, positioning mark points are arranged on the outer side of the front side wall, and a high-definition camera is arranged right in front of the front side wall so as to shoot the deformation of the side face of the soil sample in the model box 2 in real time and obtain a soil sample displacement vector diagram based on a smooth particle flow technology.
Example 3
As shown in fig. 1 to 9, the invention also discloses a test method for simulating in-plane pulling failure of a subsea anchor plate, based on the test apparatus for simulating in-plane pulling failure of a subsea anchor plate described in embodiment 1 or 2, the specific operation steps are as follows:
s1, placing the vertical supporting plate 3 in an inverted T shape in a test site, and fixing the vertical supporting plate on the ground surface by an expanded first nut 11;
s2, erecting the horizontal top plate 4 along the side edge, enabling the open end of the longitudinal slit 15 to face upwards, sequentially sliding the second pulley assembly 22 and the first pulley assembly 21 into the longitudinal sliding rail 6 from the open end of the longitudinal slit 15, and then placing the horizontal top plate 4 into the mortise of the vertical supporting plate 3 through a dovetail;
s3, after the vertical supporting plate 3 and the horizontal top plate 4 are spliced, fixing the winch 5 on one side, close to the open end of the longitudinal slit 15, of the upper surface of the horizontal top plate 4, and enabling the steel strand of the winch 5 to penetrate through the slit 15;
s4, the model box 2 is arranged on the lower side of the right side of the support frame 1, and the horizontal distance between the model box 2 and the vertical support plate 3 can be freely adjusted according to the test working condition;
s5, placing a second pulley 24 which is connected into a whole by a second pulley frame 23 in the vertical sliding track 12 on the outer side of the left side wall of the model box 2, screwing a second screw 9 into a screw hole of the second pulley frame 23, and completing the installation of a third pulley assembly 18;
s6, install first loose pulley assembly 21 under hoist 5 goes out the rope for hoist 5 goes out the rope direction and is vertical, and defines the pulley on the first loose pulley assembly 21 and be fourth pulley 26, and the pulley on the second loose pulley assembly 22 is fifth pulley 27:
the steel strand 17 is led out of the winch 5 and then sequentially wound around a fourth pulley 26 and a fifth pulley 27 to be connected with the anchor plate 13, and a force displacement sensor is connected between a pull rod of the anchor plate 13 and the steel strand;
or
After going out of the winch 5, the steel strand 17 sequentially rounds a fourth pulley 26, a fifth pulley 27 and a third pulley 28 and then is connected with the anchor plate 13, and a force displacement sensor is connected between a pull rod of the anchor plate 13 and the steel strand;
the relative positions of the fifth pulley 27 and the third pulley 28 satisfy the following relationship:
(a) when the anchor plate 13 is horizontally embedded, after the horizontal position of the anchor plate 13 is determined, the position of the fifth pulley 27 is adjusted, the left side of the wheel track of the fifth pulley 27 is tangent to the steel strand 17, and then the fifth pulley 27 is fixed on the horizontal top plate 4;
(b) when the anchor plate 13 is vertically buried, after the vertical position of the anchor plate 13 is determined, the position of the third pulley 28 is adjusted, the lower side of a wheel rail of the third pulley 28 is tangent to the steel strand 17, then the third pulley 28 is fixed on the left side wall of the model box 2, and the vertical position of the fifth pulley 27 is consistent with that of the third pulley 28;
(c) when the anchor plate 13 is buried at a certain inclination angle, the inclination angle θ is defined as an included angle between the steel strand 17 connected with the anchor plate 13 and the vertical direction, the inclination angle θ' is an included angle between the steel strand 17 connected with the anchor plate 13 and the vertical direction when the third pulley 28 moves to the topmost end of the vertical sliding track 12, and the relative positions of the fifth pulley 27 and the third pulley 28 are as follows:
c 1: when theta is more than 0 degree and less than or equal to theta', the fifth pulley 27 is fixed on the left side L of the fourth pulley 26 through the first backing plate 10 and the first nut 11ccTherein is disclosed
Lcc＝Htanθ-R/sinθ+R，
The third pulley 28 is inactive and its position is not required;
c 2: when theta' is less than or equal to 90 degrees, the upper edge of the left side wall of the model box 2 is taken as the initial position, and the third pulley 28 is fixed below the initial position by HcTherein is disclosed
Hc＝(H-h1)-(Lcm+tm+Lma)tanθ，
The vertical position of the fifth pulley 27 is kept identical to that of the third pulley 28; here, the
In the above formula, h1The distance h from the geometric center of the fifth pulley 27 to the upper edge of the mold box 22The distance h from the center of gravity of the anchor plate 13 to the upper surface of the soil sample3Is the height of the soil sample, h4Is the height of the inside of the mold box 2, taR is the radius of the fourth sheave 26, the diameters of the fourth sheave 26, the fifth sheave 27 and the third sheave 28 are the same, L 'is the horizontal distance of the fifth sheave 27 when θ' is 0 ° with respect to the fifth sheave 27 when θ is 0 °, L is the thickness of the anchor plate 13cmThe horizontal distance from the geometric center of the third pulley 28 to the outside of the left side wall of the mold box 2, tmIs the thickness of the left side wall of the model box 2, LmaThe horizontal distance from the inner side of the left side wall of the model box 2 to the gravity center of the anchor plate 13;
s7, filling the soil sample 14 into the model box 2 by adopting a rain method, placing the anchor plate 13 with the pull rod on the surface of the soil sample and fixing when the filling height is level with the embedding depth of the anchor plate 13, then continuously filling the soil sample 14, and plugging the vertical seam 20 by using geotextile in the filling process to prevent soil leakage;
s8, in order to observe the lateral deformation of the soil sample, coating a layer of colored sand on the inner side of the front wall of the model box 2 every time a certain height is filled, and stopping filling the soil when the soil sample is filled to the specified height;
s9, arranging a camera and a laser displacement sensor on the side wall of the model box 2, erecting the camera right in front of the front wall of the model box 2 for capturing deformation and displacement of the side surface and the upper surface of the soil sample in the loading process, and connecting the force displacement sensor between the pull rod of the anchor plate 13 and the steel strand for measuring the drawing force.
S10, detecting the test device and loading and testing equipment, after potential hidden dangers are eliminated, starting the winch 5 for loading, and starting the camera to capture the deformation of the soil sample.
The beneficial effects of this embodiment: according to the test method for simulating the drawing failure of the in-plane seabed anchor plate, the support frame 1 and the model box 2 are designed, the top of the support frame 1 and the side wall of the model box 2 are provided with the sliding tracks and the pulleys, the side wall of the model box 2 is provided with the vertical slits, and the anchor plate 13 can be drawn along any preset angle (0-90 degrees); the front wall of the model box 2 is made of transparent toughened glass and is preset with positioning mark points, and the right side wall and the front wall are additionally provided with a camera and a laser displacement sensor, so that the motion trail of the anchor plate 13 and the deformation and damage forms of the soil sample can be accurately captured in real time; the drawing angle setting mode is flexible, the testing device is uniform, the testing expenditure is saved, and the ultimate drawing bearing capacity of the anchor plate 13, the drawing failure mechanism and the change rule of the ultimate drawing bearing capacity can be more accurately obtained.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.
Claims (7)
1. The test device for simulating the drawing failure of the submarine anchor plate in the plane is characterized by comprising a support frame (1), a model box (2) and a winch (5), wherein a soil sample (14) is placed in the model box (2), an anchor plate (13) is buried in the soil sample (14), the support frame (1) comprises a horizontal top plate (4) and a vertical support plate (3) used for supporting the horizontal top plate (4), the model box (2) is positioned below the horizontal top plate (4), a longitudinal slit (15) penetrating through the horizontal top plate (4) is horizontally arranged on the upper edge of the horizontal top plate (4), one end of the longitudinal slit (15) penetrates through one side of the horizontal top plate (4), a longitudinal sliding rail (6) is horizontally arranged in the longitudinal slit (15), and at least two pulley assemblies are slidably matched on the longitudinal sliding rail (6), the two pulley assemblies are respectively defined as a first pulley assembly (21) and a second pulley assembly (22), the winch (5) is connected to the top of the horizontal top plate (4), a steel strand (17) led out of the winch (5) penetrates through the longitudinal slot (15) and then sequentially bypasses the first pulley assembly (21) and the second pulley assembly (22) and then is connected with the anchor plate (13), and the pulley assemblies can be fixed relative to the horizontal top plate (4).
2. The test device for simulating in-plane submarine anchor plate pulling failure according to claim 1, wherein the pulley assembly comprises a first pulley (7) in sliding fit with the longitudinal sliding rail (6), the lower end of the first pulley (7) is connected with a first pulley holder (16), a pulley is arranged on the first pulley holder (16), the upper end of the first pulley (7) is connected with a first screw (9), the first screw (9) penetrates through the longitudinal slit (15) and is fixed on the upper surface of the horizontal top plate (4) through a first backing plate (10) and a first nut (11), and when the pulley assembly and the horizontal top plate (4) are relatively fixed, the first backing plate (10) and the first pulley holder (16) clamp the horizontal top plate (4) from two sides of the horizontal top plate (4).
3. The test device for simulating the pulling failure of the in-plane seabed anchor plate according to claim 2, further comprising a third pulley assembly (18), wherein the third pulley assembly (18) is connected to the side wall (19) of the model box (2) and can be in sliding fit with the side wall (19) along the vertical direction of the side wall (19), the third pulley assembly (18) can be fixed relative to the side wall (19), and the steel strand (17) led out by the winch (5) passes through the longitudinal slit (15) and then sequentially bypasses the first pulley assembly (21), the second pulley assembly (22) and the third pulley assembly (18) and then is connected with the anchor plate (13).
4. The test device for simulating in-plane seabed anchor plate pulling failure according to claim 3, wherein a vertical slit (20) penetrating through the side wall (19) is vertically arranged on the side wall (19) of the model box (2), the lower end of the vertical slit (20) corresponds to the maximum embedding depth of the anchor plate (13), vertical sliding rails (12) are arranged on both sides of the vertical slit (20), the third pulley assembly (18) comprises a second pulley frame (23), a second pulley (24) is connected to the second pulley frame (23), the second pulley (24) is in sliding fit with the vertical sliding rails (12), the second pulley frame (23) is connected with a second screw (29) and a third pulley (28), one end of the second screw (29) penetrates through the vertical slit (20), and is fixed on the side wall (19) through a second backing plate (25) and a second nut (8), when the third pulley assembly (18) and the side wall (19) are fixed relatively, the second cushion plate (25) and the second pulley frame (23) clamp the side wall (19) from two sides of the thickness of the side wall (19).
5. A test device for simulating in-plane pulling failure of a seabed anchor plate according to any one of claims 1 to 4, wherein the bottom of the vertical support plate (3) is provided with a vertical hole, and the vertical hole is matched with an expansion first nut (11) for fixing the vertical support plate (3) on the ground.
6. A test method for simulating drawing failure of a seabed anchor plate in a plane is characterized in that based on the test device for simulating drawing failure of the seabed anchor plate in the plane in claim 4, the specific operation steps are as follows:
s1, vertically placing the vertical supporting plate (3) on a test site, and fixing the vertical supporting plate on the ground surface by an expanded first nut (11);
s2, erecting the horizontal top plate (4) along the side edge, enabling the open end of the longitudinal slit (15) to face upwards, sequentially sliding the second pulley assembly (22) and the first pulley assembly (21) into the longitudinal sliding rail (6) from the open end of the longitudinal slit (15), and then placing the horizontal top plate (4) into the mortise of the vertical supporting plate (3) through a dovetail;
s3, after the vertical supporting plate (3) and the horizontal top plate (4) are spliced, fixing the winch (5) on one side, close to the open end of the longitudinal slit (15), of the upper surface of the horizontal top plate (4), and enabling the steel strand of the winch (5) to penetrate through the longitudinal slit (15);
s4, placing the model box (2) below the support frame (1);
s5, arranging a second pulley (24) which is connected into a whole by a second pulley frame (23) in the vertical sliding track (12), screwing a second screw (9) into a screw hole of the second pulley frame (23), and completing the installation of a third pulley assembly (18);
s6, the first pulley assembly (21) is installed under the rope outlet of the winch (5), the rope outlet direction of the winch (5) is vertical, a pulley on the first pulley assembly (21) is defined as a fourth pulley (26), and a pulley on the second pulley assembly (22) is defined as a fifth pulley (27):
after being taken out of the winch (5), the steel strand (17) sequentially rounds a fourth pulley (26) and a fifth pulley (27) and then is connected with an anchor plate (13), and a force displacement sensor is connected between a pull rod of the anchor plate (13) and the steel strand;
or
After being taken out of the winch (5), the steel strand (17) sequentially rounds a fourth pulley (26), a fifth pulley (27) and a third pulley (28) and then is connected with an anchor plate (13), and a force displacement sensor is connected between a pull rod of the anchor plate (13) and the steel strand;
s7, filling the soil sample (14) into the model box (2) by adopting a rain method, placing the anchor plate (13) with the pull rod on the surface of the soil sample and fixing when the filling height is level with the embedding depth of the anchor plate (13), then continuously filling the soil sample (14), and plugging the vertical slit (20) by using geotextile in the filling process to prevent soil leakage;
s8, in order to observe the lateral deformation of the soil sample, coating a layer of colored sand on the inner side of the front wall of the model box (2) every time when the soil sample is filled to a certain height, and stopping filling the soil when the soil sample is filled to the specified height;
s9, arranging a first camera and a laser displacement sensor on the side wall of the model box (2), erecting a second camera right in front of the front wall of the model box (2),
the first camera is used for capturing deformation of the upper surface part of the soil sample in the rope winding process of the winch;
the laser displacement sensor is used for capturing the displacement of the upper surface part of the soil sample in the rope winding process of the winch;
the front wall of the model box (2) is made of transparent material;
the second camera is used for catching the deformation of the colored sand part on the front side surface of the soil sample in the rope winding process of the winch.
7. The test method for simulating in-plane submarine anchor plate pullout failure according to claim 6, wherein in step S6, the relative positions of the fifth pulley (27) and the third pulley (28) satisfy the following relationship:
(a) when the anchor plate (13) is horizontally embedded, after the horizontal position of the anchor plate (13) is determined, the position of a fifth pulley (27) is adjusted, the left side of a wheel rail of the fifth pulley (27) is tangent to the steel strand (17), and then the fifth pulley (27) is fixed on the horizontal top plate (4);
(b) when the anchor plate (13) is vertically buried, after the vertical position of the anchor plate (13) is determined, the position of a third pulley (28) is adjusted, the lower side of a wheel rail of the third pulley (28) is tangent to the steel strand (17), then the third pulley (28) is fixed on the side wall of the model box (2), and the vertical position of a fifth pulley (27) is consistent with that of the third pulley (28);
(c) when the anchor plate (13) is buried at a certain inclination angle, the inclination angle theta is defined as an included angle between a steel strand (17) connected with the anchor plate (13) and the vertical direction, when the third pulley (28) moves to the topmost end of the vertical sliding track (12), the included angle between the steel strand (17) connected with the anchor plate (13) and the vertical direction is defined as an included angle between the fifth pulley (27) and the third pulley (28):
c 1: when theta is more than 0 degree and less than or equal to theta', the fifth pulley (27) is fixed on the left side L of the fourth pulley (26) through the first base plate (10) and the first nut (11)ccTherein is disclosed
Lcc＝Htanθ-R/sinθ+R；
c 2: when theta' is less than or equal to 90 degrees, the upper edge of the left side wall of the model box (2) is taken as the initial position, and the third pulley (28) is fixed below the initial position by HcTherein is disclosed
Hc＝(H-h1)-(Lcm+tm+Lma)tanθ，
The vertical position of the fifth pulley (27) is consistent with that of the third pulley (28); here, the
In the above formula, h1The distance h from the geometric center of the fifth pulley (27) to the upper edge of the model box (2)2The distance h from the center of gravity of the anchor plate (13) to the upper surface of the soil sample3Is the height of the soil sample, h4Is the height of the inside of the mold box (2), taThe thickness of the anchor plate (13) is determined, R is the radius of the fourth pulley (26), the diameters of the fourth pulley (26), the fifth pulley (27) and the third pulley (28) are the same, the horizontal distance of the fifth pulley (27) relative to the fifth pulley (27) when theta is 0 DEG when L' is theta, and L is LcmThe horizontal distance t from the geometric center of the third pulley (28) to the outer side of the side wall (19) of the model box (2)mIs the thickness, L, of the side wall (19) of the mold box (2)maThe horizontal distance from the inner side of the side wall (19) of the model box (2) to the gravity center of the anchor plate (13).
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| CN202111431236.7A CN113916663A (en) | 2021-11-29 | 2021-11-29 | Test device and test method for simulating drawing failure of seabed anchor plate in plane |
| PCT/CN2022/082666 WO2023092911A1 (en) | 2021-11-29 | 2022-03-24 | Test device and method for simulating pull-out failure of seabed anchor plate in plane |
| JP2022159321A JP7199770B1 (en) | 2021-11-29 | 2022-10-03 | Test equipment and test method for simulating pull-out invalidation of in-plane submarine anchor plates |
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| WO2023092911A1 (en) * | 2021-11-29 | 2023-06-01 | 浙大城市学院 | Test device and method for simulating pull-out failure of seabed anchor plate in plane |
| CN116793837A (en) * | 2023-06-07 | 2023-09-22 | 中国科学院力学研究所 | Dynamic stress simulation device and method for pipeline in soft clay seabed environment |
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| JP7199770B1 (en) | 2023-01-06 |
| WO2023092911A1 (en) | 2023-06-01 |
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