CN108149720A - A kind of experiment deviation correcting device rectified a deviation to oblique model pile foundation and method - Google Patents

A kind of experiment deviation correcting device rectified a deviation to oblique model pile foundation and method Download PDF

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Publication number
CN108149720A
CN108149720A CN201711275536.4A CN201711275536A CN108149720A CN 108149720 A CN108149720 A CN 108149720A CN 201711275536 A CN201711275536 A CN 201711275536A CN 108149720 A CN108149720 A CN 108149720A
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China
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pile foundation
model pile
experiment
deviation
model
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CN201711275536.4A
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Chinese (zh)
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CN108149720B (en
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贺瑞
朱涛
马博
张继生
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河海大学
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    • EFIXED CONSTRUCTIONS
    • E02HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02DFOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D33/00Testing foundations or foundation structures
    • EFIXED CONSTRUCTIONS
    • E02HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02DFOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D35/00Straightening, lifting, or lowering of foundation structures or of constructions erected on foundations

Abstract

The invention discloses a kind of experiment deviation correcting device rectified a deviation to oblique model pile foundation and method, device includes chamber, puller system, traverse cycle load loading device and longitudinal cyclic load loading device;Puller system provides the correction power automatically adjusted according to model pile foundation corner size for model pile foundation, and traverse cycle load loading device is used to apply traverse cycle load to model pile foundation;Longitudinal cyclic load loading device is in the vertical application cyclic load of model pile foundation inclination.The inclination that the present invention is generated under Long-term Cyclic Loading for offshore pile model provides method for correcting error, i.e., is acted on, while apply power of rectifying a deviation and rectify a deviation to model pile foundation between weakening stake soil by applying horizontal and vertical horizontal whirl-sprayed pile respectively.Experimental rig and test method can measure the variation at model pile foundation inclination angle after application long-time cyclic load and correction power, so as to investigate the feasibility and science of the method that cyclic load rectifies a deviation to model pile foundation.

Description

A kind of experiment deviation correcting device rectified a deviation to oblique model pile foundation and method

Technical field

The present invention relates to a kind of test measurement technical field, rectify a deviation more particularly to a kind of to oblique model pile foundation Test deviation correcting device and method.

Background technology

Large diameter single pile foundation is a kind of most ripe base form of current offshore wind turbine, apply in general to the depth of water 20 ~ The shallow sea water of 30m is inserted into 20 ~ 35m in soil.

The marine environment that offshore wind turbine is faced is extremely severe, and wind turbine is by eternal wind-force, wave force and flow Power etc., these lateral cyclic loads, which are transferred to pile foundation, will cause permanent lateral deformation.When pile body corner is more than 0.5 °, so that it may It can cause wind-driven generator can not normal operation.And there is very big non-intellectual in accumulative deformation of the pile foundation under lateral load, give The design of pile foundation increases very big difficulty.

The residing marine environment of offshore wind turbine installation is equally sufficiently complex, by factors such as wind, wave, stream and tides during installation It influences, and sea bed soil, generally than relatively soft, piling is easy to run-off the straight.

When single-pile foundation pile body inclining angle is more than 0.5 °, it is possible to cause wind-driven generator can not normal operation, at this time If huge economic loss can be caused by directly scrapping wind turbine.Therefore, it is necessary to propose reliably method by pile body in time into Row correction so as to improve the service life of wind turbine, increases economic benefit.

Single pile formula offshore wind turbine foundation is built in China, is faced with complicated marine geo-hazard.In Sea Area in Fujian sea bed Surface layer is mainly muck soil, silty clay, sand etc. of sea product accumulation, is underlied for Weathered Granite layer, usually at the bottom of pile foundation Portion is already close to seabed batholith layer.It is therefore desirable to the in test true marine geo-hazard of effective simulation, including simulation The experiment sand of sea bed, the experiment water of simulated seawater and the concrete layer for simulating batholith.

Invention content

It is a primary object of the present invention to isometric with wind, wave, stream in installation process with regard to current offshore wind turbine single-pile foundation The defects of lateral displacement easily occurs under phase cyclic load proposes what is rectified a deviation by applying cyclic load to tilting pile foundation Method for correcting error, and the experimental rig and method that verification experimental verification is carried out to this method are provided, especially suitable for offshore wind turbine raked pile The correction experimental study of base.

The technical problems to be solved by the invention be to provide it is compact-sized, convenient for disassembly and assembly, be easy to make, securely and reliably, in fact With a kind of strong experiment deviation correcting device rectified a deviation to oblique model pile foundation of property, the complicated ring residing for pile foundation can be simulated Border, and the rectifying effect for tilting pile foundation under the cyclic load of correction power and different directions is accurately obtained, passed through with demonstration After additional traverse cycle load, longitudinal cyclic load carry out attenuation to stake soil, correction power is rectified a deviation to tilting pile foundation Feasibility and science, and in Practical Project pile foundation correction provide guidance, have the utility value in industry.

Another technical problem to be solved by this invention is to provide variable simulated environment, response quickly, measures accurate, measurement As a result effective a kind of test method rectified a deviation to oblique model pile foundation, by load test and data acquisition and to score Analysis can obtain the changing rule at the model pile foundation angle of inclination under different cycle-indexes and different correction loads.

In order to achieve the above object, the technical solution adopted by the present invention is:It is a kind of to rectify a deviation to oblique model pile foundation Deviation correcting device is tested, hollow chamber, puller system, traverse cycle load loading device, longitudinal direction cycle including top surface opening Load loading device, the model pile foundation in chamber and data acquisition device;

Be filled with successively from top to bottom in the chamber for simulate batholith concrete, simulate sea bed experiment soil and for mould Intend the experiment water of seawater;

The data acquisition device includes Acquisition Instrument, computer and displacement sensor, and Acquisition Instrument is connected with computer, and displacement passes Sensing unit is connected with Acquisition Instrument, and the displacement sensor is arranged on the model pile foundation side;

Puller system provides horizontal correction dead load for model pile foundation, and the puller system is connected to model pile foundation by flexible cable two On the side opposite with inclined direction, model pile foundation that computer is calculated according to the displacement that the displacement sensor measures Corner changes the horizontal correction dead load size to adjust puller system offer;

The traverse cycle load loading device includes motor, eccentric massblock, connecting plate, pulley one, pulley two and pulley three, The pulley one and pulley two are respectively positioned at chamber and model pile foundation inclined direction opposite side, model pile foundation inclined direction Side, the motor are fixed on horizontal connecting plate on one end far from chamber, and the power output shaft of motor passes through connection Plate simultaneously passes through connecting rod and is connected with eccentric massblock, and the both ends of connecting rod connect the power output shaft and eccentric massblock of motor respectively, One end of flexible cable one is connected on model pile foundation inclined direction side, and the other end is connected on the connecting plate around pulley three and leans on On the side of nearly chamber;One end connection balance mass block of flexible cable three, the other end connect after bypassing pulley one, pulley two successively On the side of the separate chamber of the connecting plate, the connecting plate is articulated on the outside of chamber, the traverse cycle load Loading device is used to apply traverse cycle load to model pile foundation;

The longitudinal direction cyclic load loading device includes vibrator and mandril, and the vibrator is located at the model pile foundation side, One end of the mandril and vibrator are affixed, and the other end and model pile foundation are affixed, and the power of vibrator is passed to described by mandril Model pile foundation, for applying longitudinal cyclic load to model pile foundation.

Further, the puller system includes electromagnet, adjustable resistance and quality iron block, and the quality iron block passes through soft The side opposite with inclined direction of two link model pile foundation of rope, described in the electromagnet face quality iron block set, it is described can Resistance is adjusted to connect with the electromagnet, the computer is connected with adjustable resistance, and computer is measured according to displacement sensor The model pile foundation corner variation that displacement is calculated carrys out the magnetic force of regulating magnet so as to adjust correction power size.

Further, the experimental rig further includes the taper pile guider for carrying out angle control to model pile foundation, Taper pile guider is located in the middle part of the chamber internal face, is truss structure, and the top-bottom chord end of truss is each to be hinged one A semicircular cylinder that can be freely rotated, angle of inclination of the boom end retractable structure so as to Controlling model pile foundation of winding up.

Further, the semicircular cylinder internal diameter of the taper pile guider is slightly larger than model pile foundation outer diameter, the upper lower edge of truss Bar distance is fixed, and the boom end that winds up can stretch and indicate scale;After model pile foundation installs, top-bottom chord retractable To the position of no longer contact model pile foundation.

Further, the displacement sensor includes the displacement sensor one for being respectively positioned on model pile foundation side and displacement passes Sensor two, displacement sensor one and displacement sensor are arranged about two, are measured by displacement sensor one and displacement sensor two The corner variation of model pile foundation is calculated after 2 displacements.

Further, the data acquisition device further includes force snesor, and force snesor is connected with Acquisition Instrument, and the power passes Sensor is arranged on the advancing side of model pile foundation, for the size of cyclic load suffered by measurement model pile foundation.

The vibrator is fixed on by screw rod on loading frame, and the loading frame is inverted U, is hung down including crossbeam and respectively Directly in the vertical beam at crossbeam both ends, the loading frame is erected at chamber upper end, and loading frame can be moved forward and backward.

The test method rectified a deviation using above-mentioned experimental rig to oblique model pile foundation, is included the following steps:

(1)Fill concrete and experiment soil are layered in chamber and is tamped;

(2)After above-mentioned soil is filled to experiment desired height, into chamber adding water to the water surface floods soil, and after native saturation, water is arranged Go out, until native surface is anhydrous, wait for the complete discharging consolidation of soil;

(3)After native discharging consolidation completely, inclined model pile foundation is squeezed into scheduled angle;

(4)Start automatic adjustment correction power apparatus, reciprocating mechanism and longitudinal cyclic load loading device, to inclined model Pile foundation applies the cyclic load of the constant load opposite with inclined direction and different directions, and real-time measurement model pile foundation is in correction Angle of inclination afterwards, and utilize the size of automatic adjustment correction power apparatus adjusting constant load;

(5)Repeat step(3)、(4), change cyclic load cycle-index, measure the angle of inclination after taper pile correction respectively, with Compare the rectifying effect after the cyclic load of different cycle-indexes.

The test method obtains different cycle-indexes and different corrections by load test and data acquisition and comparative analysis The changing rule at the model pile foundation angle of inclination under load, so as to obtain optimal cyclic load number and correction power size, and Reference and guidance are provided to the inclination pile foundation correction in Practical Project.

Further, step is further included(6), the control shut down computer to adjustable resistance, manual adjustment correction power size, The angle of inclination after taper pile correction is measured respectively, to compare the influence of the deviation adjustment angle of different correction power;Wherein, step(6) For replacing the step(5)Or include step simultaneously(5)And step(6).

Further, step(3)In, by adjusting the top boom tip lengths of taper pile guider to reach scheduled angle Degree is squeezed into inclined model pile foundation with scheduled angle with the mode of hammering injection, after model pile foundation installs, is shunk up and down Chord member is to the position of no longer contact model pile foundation.

Compared with prior art, the invention has the advantages that:

Can be what offshore wind turbine single-pile foundation generated under Long-term Cyclic Loading by this test measurement device and test method Accumulative displacement provides experiment deviation correcting device and test method, passes through the vertical application in model pile foundation inclined direction and inclined direction Cyclic load weakens the contact between the soil body and stake, then reversely applies adjustable constant correction power in inclined direction;By this Experimental rig and test method investigate the feasibility and science of the method that cyclic load rectifies a deviation to pile foundation, so as to being existing Field deviation correcting device and method provide a kind of reference.

The above is only the general introduction of technical solution of the present invention, in order to be better understood upon the technological means of the present invention, under With reference to attached drawing, the invention will be further described in face.

Description of the drawings

Fig. 1 is a kind of structure diagram of experimental rig rectified a deviation to tilting pile foundation of the present invention;

Fig. 2 is a kind of taper pile guider structure diagram of experimental rig rectified a deviation to tilting pile foundation of the present invention;

Fig. 3-1 is a kind of taper pile guider top boom end construction of experimental rig rectified a deviation to tilting pile foundation of the present invention Front view;

Fig. 3-2 is a kind of taper pile guider top boom end construction of experimental rig rectified a deviation to tilting pile foundation of the present invention Vertical view;

Fig. 3-3 is that the present invention is a kind of to wind up boom end chord member to tilting the taper pile guider of experimental rig rectified a deviation of pile foundation Top partial view diagram and front view;

Fig. 4 is a kind of puller system schematic diagram of experimental rig rectified a deviation to tilting pile foundation of the present invention;

Fig. 5-1 is a kind of main view of the traverse cycle load loading device of experimental rig rectified a deviation to tilting pile foundation of the present invention Figure;

Fig. 5-2 is a kind of vertical view of the traverse cycle load loading device of experimental rig rectified a deviation to tilting pile foundation of the present invention Figure;

Fig. 6 is a kind of longitudinal cyclic load loading device front view of experimental rig rectified a deviation to tilting pile foundation of the present invention;

Fig. 7 is a kind of longitudinal cyclic load loading device left view of experimental rig rectified a deviation to tilting pile foundation of the present invention;

Fig. 8 is a kind of vertical view of experimental rig rectified a deviation to tilting pile foundation of the present invention.

Specific embodiment

With reference to the accompanying drawings of the specification, the present invention is further illustrated.

A kind of experimental rig rectified a deviation to oblique model pile foundation as shown in figures 1-8, including top surface open hollow Chamber 1, puller system, traverse cycle load loading device and longitudinal cyclic load loading device 3, in chamber 1 Model pile foundation 4 and data acquisition device.Chamber is preferably iron case, and the experiment iron case is welded, and do by steel plate Antirust treatment.The chamber 1 is welded by steel plate and does antirust treatment, is inside filled with the experiment soil for simulating sea bed 11st, the concrete 13 for the experiment water 12 of simulated seawater and for simulating batholith, experiment soil 11 are chosen as sand.Such as Fig. 1 institutes Show, the tank wall medial surface and bottom inner bottom surface of chamber 1 are both provided with damping coating layer;In order to increase intensity, the case of chamber 1 Axially length direction is provided with angle steel rib 14 to wall lateral surface.

Drainpipe 15 is additionally provided in the case of the chamber 1, the drainpipe 15 is laid and stretched close to top of concrete Go out the tank wall of chamber 1.Specifically process of deployment can be:Certain thickness concrete 13 is poured in 1 bottom of chamber to simulate rock Base arranges drainpipe 15 in 13 top surface of concrete, and setpoint distance is spaced on drainpipe 15 and stamps osculum, surrounding pads upper gravel Stone, gravel top layer overlay geotechnique's woven fabric prevent sand class experiment soil to be lost in from drainpipe 15;Then above geotechnological woven fabric Sand is inserted in layering.

The data acquisition device includes Acquisition Instrument 61, computer 62 and displacement sensor, Acquisition Instrument 61 and computer 62 are connected, and displacement sensor is connected with Acquisition Instrument 61, and the displacement sensor is arranged on 4 side of model pile foundation;Institute Displacement sensor is stated to include being respectively positioned on the displacement sensor 1 of 4 side of model pile foundation and displacement sensor 28, displacement sensing Device 1 and displacement sensor are arranged about 28, are counted after measuring 2 displacements by displacement sensor 1 and displacement sensor 28 Calculate the corner variation of model pile foundation 4.

Puller system provides horizontal correction dead load for model pile foundation, and the puller system is connected to Model Pile by flexible cable two On the side opposite with inclined direction of base, mould that computer 62 is calculated according to the displacement that the displacement sensor measures Type pile foundation corner changes the horizontal correction dead load size to adjust puller system offer.

The traverse cycle load loading device includes motor 21, eccentric massblock 22, pulley 1, pulley 2 16 and slides 3 18 are taken turns, the pulley 1 and pulley 2 16 are respectively positioned at chamber 1 and 4 inclined direction opposite side of model pile foundation, model Pile foundation inclination direction side, the motor 21 are fixed on connecting plate 23 on one end far from chamber 1, and the power of motor 21 is defeated Shaft passes through connecting plate 23 and passes through connecting rod to be connected with eccentric massblock 22, and one end of flexible cable one is connected to model pile foundation 4 and tilts On the side of direction, the other end is connected on the connecting plate 23 around pulley 3 18 on the side of chamber;Flexible cable three One end connection balance mass block, the other end are connected to the separate examination of the connecting plate 23 around pulley 1, after pulley 2 16 successively On the side of tryoff, the connecting plate 23 is articulated on the outside of chamber, and the traverse cycle load loading device is used for model Pile foundation applies the gravity of traverse cycle load, pulley 1 and pulley 2 16 for balancing motor and eccentric massblock 22, pulley four 17 for applying horizontal correction dead load, and pulley 3 18 is used to apply cyclic load.The traverse cycle load loading device adds Load process drives 22 uniform rotation of eccentric massblock for motor 21, and eccentric massblock 22 and connecting plate 23 are close to one side of chamber The distance of point is SIN function, then torque caused by eccentric massblock 22 is also SIN function, so applied by flexible cable Pulling force is sinusoidal cyclic load.

The puller system includes electromagnet 241, adjustable resistance 242 and quality iron block 243, and the quality iron block 243 is logical Cross the side opposite with inclined direction of two link model pile foundation 4 of flexible cable, quality iron block 243 described in 241 face of electromagnet Setting, the adjustable resistance 242 are connected with the electromagnet 241, and the computer 62 is connected with adjustable resistance 242, computer 62 according to the model pile foundation corners that are calculated of displacements that displacement sensor measures change come the magnetic force of regulating magnet so as to Adjustment correction power size.Preferably, one end of flexible cable two is connected on the side opposite with inclined direction of model pile foundation 4, separately One end is connected to around pulley 4 17 on quality iron block 243, and quality iron block 243 applies correction power, electromagnet by pulley 4 17 241 are placed in immediately below quality iron block 243, and for adjusting power size of rectifying a deviation, displacement sensor one and displacement sensor two are set In the side of model pile foundation 4, distance 20cm up and down measures the variation that 4 corner of model pile foundation can be calculated after 2 displacements, when When corner varies less, illustrate that constant load size is inadequate, then can trigger feedback regulation program, reduce 242 size of adjustable resistance, Increase 241 magnetic force of electromagnet, so as to increase the correction power of the application of quality iron block 243, conversely, can reduce when corner changes very greatly Correction power;The longitudinal direction cyclic load loading device 3 is made of vibrator 31 and loading frame 32, is tilted in model pile foundation 4 vertical Apply cyclic load, achieve the purpose that contact between reduction model pile foundation and the soil body;The vibrator 31 is fixed on by screw rod On loading frame 32;The loading frame 32 is inverted U, including crossbeam and the vertical beam 33 for being respectively perpendicular to crossbeam both ends;The vertical beam It is provided with steel plate ribbed stiffener.

The longitudinal direction cyclic load loading device includes vibrator 31 and mandril, and the vibrator 31 is located at the Model Pile 4 side of base, one end of the mandril and vibrator 31 are affixed, and the other end and model pile foundation 4 are affixed, and the power of vibrator 31 passes through top Bar passes to the model pile foundation 4, and user applies model pile foundation longitudinal cyclic load.Preferably, there is spiral shell at the mandril both ends Line, one end are screwed in 31 screw hole of vibrator, and the other end is screwed in the reserved screw hole of model pile foundation 4, realizes mandril and vibrator 31 It is affixed with model pile foundation 4.

The steel pipe model pile foundation 4 is hollow steel pile pile, by hammer mode penetration test soil 11, and passes through taper pile Guider 5 carries out angle control.

The taper pile guider 5 is installed on position among 1 wall inner face of chamber, for truss structure 51, top-bottom chord end Each hinged semicircular cylinder 54 that can be freely rotated in portion, the boom end 53 that winds up are scalable so as to control taper pile angle.Semicircular cylinder 54 preferably half thin-walled cylinders.

The semicircular cylinder internal diameter of the taper pile guider is slightly larger than model pile foundation outer diameter, and the top-bottom chord distance of truss is solid Fixed, the boom end that winds up can stretch and indicate scale;After model pile foundation installs, top-bottom chord retractable is to no longer connecing The position of touch type pile foundation.

The data acquisition device further includes force snesor 63, and force snesor 63 is connected with Acquisition Instrument 61, the power sensing Device 63 is arranged on the advancing side of model pile foundation 4, for the size of cyclic load suffered by measurement model pile foundation.

The vibrator 31 is fixed on by screw rod on loading frame 32, the loading frame 32 be inverted U, include crossbeam with The vertical beam 33 at crossbeam both ends is respectively perpendicular to, the loading frame 32 is erected at 1 upper end of chamber, and loading frame 32 front and rear can move It is dynamic.

It is tested using a kind of experimental rig rectified a deviation to oblique model pile foundation provided by the invention, experiment side Method includes the following steps:

1)Layering is inserted experiment soil 11 and is tamped in chamber 1;

2)After experiment soil 11 is filled to experiment desired height, by drainpipe 151, into chamber, test for added water water 12 to the water surface floods Soil 11 is not tested, after native 11 saturation to be tested, experiment water 12 is discharged from drainpipe 15, native 11 surfaces are anhydrous to testing, waiting The native 11 complete discharging consolidations of experiment;

3)After the native 11 complete discharging consolidations of experiment, adjustment taper pile guider 5 winds up 53 length of boom end to reach scheduled Angle squeezes into taper pile 4 with the mode of hammering injection;

4)Start-up loading motor 21 and vibrator 31 apply taper pile 4 constant load and different directions opposite with inclined direction Cyclic load, measure angle of inclination of the taper pile 4 after correction in real time, and dead load size is adjusted using puller system;

5)Repeat 4)Step changes cyclic load cycle-index, the angle of inclination after taper pile 4 is rectified a deviation is measured respectively, with comparison Rectifying effect after the cyclic load of different cycle-indexes;

6)Correction force feedback regulating device 24 is closed, actively adjusts correction power size, measures the inclination after taper pile 4 is rectified a deviation respectively Angle, to compare the influence of the deviation adjustment angle of different correction power.

The size that chamber 1 provided by the invention can be made into length × width × height is 2m × 2m × 1.5m, and experiment soil 11 is optional Grain size is taken as the sand of the .2mm of 0 .08mm ~ 0.

It is provided using the present invention a kind of to tilting experiment deviation correcting device and the test method that pile foundation is rectified a deviation, Practical Project In to tilt pile foundation correction can refer to this experimental rig and test method, pass through cyclic load and correction power collective effect It rectifies a deviation to pile foundation.

The innovation of the invention consists in that by this experiment deviation correcting device and test method, it can study and be recycled by applying It is contacted between load reduction stake soil, and then applies the feasibility and science of method that constant load rectifies a deviation to pile foundation, and Provide the angle controller squeezed into of raked pile in experiment, additionally provide it is a kind of can automatic feedback adjust correction load Method, and may finally will provide reference for the deviation correcting device in Practical Project and method.

Basic principle, the main features and advantages of the present invention have been shown and described above.The technical staff of the industry should Understand, the present invention is not limited to the above embodiments, and the above embodiments and description only describe the originals of the present invention Reason, without departing from the spirit and scope of the present invention, various changes and improvements may be made to the invention, these changes and improvements It all fall within the protetion scope of the claimed invention.The claimed scope of the invention is by appended claims and its equivalent circle It is fixed.

Claims (10)

1. a kind of experiment deviation correcting device rectified a deviation to oblique model pile foundation, which is characterized in that including the hollow of top surface opening Chamber(1), puller system, traverse cycle load loading device, longitudinal cyclic load loading device, set on chamber(1)It is interior Model pile foundation(4)And data acquisition device;
The chamber(1)Inside it is filled with the concrete for simulating batholith successively from top to bottom(13), simulation sea bed experiment soil (11)With the experiment water for simulated seawater(12);
The data acquisition device includes Acquisition Instrument(61), computer(62)And displacement sensor, Acquisition Instrument(61)And calculating Machine(62)It is connected, displacement sensor and Acquisition Instrument(61)It is connected, the displacement sensor is arranged on the model pile foundation(4) Side;
Puller system provides horizontal correction dead load for model pile foundation, and the puller system is connected to model pile foundation by flexible cable two On the side opposite with inclined direction, computer(62)The model that the displacement measured according to the displacement sensor is calculated Pile foundation corner changes the horizontal correction dead load size to adjust puller system offer;
The traverse cycle load loading device includes motor(21), eccentric massblock(22), connecting plate(23), pulley one(9)、 Pulley two(16)With pulley three(18), the pulley one(9)With pulley two(18)Inclining with model pile foundation positioned at chamber respectively Tilted direction opposite side, model pile foundation inclined direction side, the motor are fixed on horizontal connecting plate(23)Upper separate experiment On one end of case, motor(21)Power output shaft pass through connecting plate(23)And pass through connecting rod and be connected with eccentric massblock, connecting rod Both ends connect the power output shaft and eccentric massblock of motor respectively(22), one end of flexible cable one is connected to model pile foundation(4) On inclined direction side, the other end bypasses pulley three(18)It is connected to the connecting plate(23)On the side of upper close chamber; One end connection balance mass block of flexible cable three, the other end bypass pulley one successively(9), pulley two(16)After be connected to the connection Plate(23)Separate chamber side on, the connecting plate(23)It is articulated on the outside of chamber, the traverse cycle load adds It carries and puts to apply traverse cycle load to model pile foundation;
The longitudinal direction cyclic load loading device includes vibrator(31)And mandril, the vibrator(31)It is located at the Model Pile Base(4)Side, one end of the mandril and vibrator(31)It is affixed, the other end and model pile foundation(4)It is affixed, vibrator(31)'s Power passes to the model pile foundation by mandril(4), for model pile foundation(4)Apply longitudinal cyclic load.
2. experiment deviation correcting device according to claim 1, which is characterized in that the puller system includes electromagnet(241)、 Adjustable resistance(242)With quality iron block(243), the quality iron block(243)Model pile foundation is connected to by flexible cable two(4)With On the opposite side of inclined direction, the electromagnet(241)Quality iron block described in face(243)Setting, the adjustable resistance (242)With the electromagnet(241)Series connection, the computer(62)With adjustable resistance(242)It is connected, computer(62)According to position It moves the model pile foundation corner variation that the displacement that sensing element measures is calculated and carrys out the magnetic force of regulating magnet so as to adjust correction Power size.
3. experiment deviation correcting device according to claim 1, which is characterized in that the experimental rig is further included for model Pile foundation carries out the taper pile guider of angle control, and taper pile guider is located at the chamber(1)It is purlin in the middle part of internal face Frame structure, each hinged semicircular cylinder that can be freely rotated in top-bottom chord end of truss, wind up boom end(53)It is scalable Structure is so as to Controlling model pile foundation(4)Angle of inclination.
4. experiment deviation correcting device according to claim 3, which is characterized in that the semicircular cylinder internal diameter of the taper pile guider Slightly larger than model pile foundation outer diameter, the top-bottom chord distance of truss is fixed, and the boom end that winds up can stretch and indicate scale;Model Pile After base installs, top-bottom chord retractable to the position of no longer contact model pile foundation.
5. experiment deviation correcting device according to claim 1, which is characterized in that the displacement sensor includes being respectively positioned on mould Type pile foundation(4)The displacement sensor one of side(7)With displacement sensor two(8), displacement sensor one(7)With displacement sensor two (8)Arrangement up and down, passes through displacement sensor one(7)With displacement sensor two(8)Model pile foundation is calculated after measuring 2 displacements (4)Corner variation.
6. experiment deviation correcting device according to claim 1, which is characterized in that the data acquisition device further includes power sensing Device(63), force snesor(63)With Acquisition Instrument(61)It is connected, the force snesor(63)It is arranged on model pile foundation(4)Tension portion Position, for the size of cyclic load suffered by measurement model pile foundation.
7. experiment deviation correcting device according to claim 1, which is characterized in that the vibrator(31)It is fixed on by screw rod Loading frame(32)On, the loading frame(32)For inverted U, including crossbeam and the vertical beam for being respectively perpendicular to crossbeam both ends(33), The loading frame(32)It is erected at chamber(1)Upper end, loading frame(32)It can be moved forward and backward.
8. the experiment side rectified a deviation using the experiment deviation correcting device as described in one of claim 1-7 to oblique model pile foundation Method, which is characterized in that include the following steps:
(1)Layering is inserted experiment soil and is tamped in chamber;
(2)After experiment soil is filled to experiment desired height, the water surface is added water into chamber and floods experiment soil, soil saturation to be tested Afterwards, water is discharged, until the native surface of experiment is anhydrous, waits the complete discharging consolidation of soil to be tested;
(3)After experiment soil discharging consolidation completely, inclined model pile foundation is squeezed into scheduled angle;
(4)Start puller system, motor and vibrator, apply the constant load opposite with inclined direction to inclined model pile foundation With the cyclic load of different directions, angle of inclination of the real-time measurement model pile foundation after correction, and the big of constant load is adjusted It is small;
(5)Repeat step(4), change cyclic load cycle-index, the angle of inclination after taper pile correction measured respectively, with comparison Rectifying effect after the cyclic load of different cycle-indexes.
9. test method according to claim 8, which is characterized in that further include step(6), shut down computer to adjustable electric The control of resistance, manual adjustment correction power size, measures the angle of inclination after taper pile correction respectively, to compare different correction power The influence of deviation adjustment angle;Wherein, step(6)For replacing the step(5)Or include step simultaneously(5)And step(6).
10. test method according to claim 8, which is characterized in that step(3)In, by adjusting taper pile guider Top boom tip lengths to reach scheduled angle, with hammering injection mode inclined Model Pile is squeezed into scheduled angle Base after model pile foundation installs, shrinks top-bottom chord to the position of no longer contact model pile foundation.
CN201711275536.4A 2017-12-06 2017-12-06 The test deviation correcting device and method that a kind of pair of oblique model pile foundation is rectified a deviation CN108149720B (en)

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