CN207499007U - Horizontal bidirectional cyclic load loading device based on model casing - Google Patents
Horizontal bidirectional cyclic load loading device based on model casing Download PDFInfo
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- CN207499007U CN207499007U CN201721509964.4U CN201721509964U CN207499007U CN 207499007 U CN207499007 U CN 207499007U CN 201721509964 U CN201721509964 U CN 201721509964U CN 207499007 U CN207499007 U CN 207499007U
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Abstract
The utility model is related to ocean pile foundation engineering research fields, it is desirable to provide a kind of horizontal bidirectional cyclic load loading device based on model casing.Model casing in the device is open-topped cube box-structure, and internal fill stratum, soil layer fills water on surface；Fixed pulley is respectively provided on two adjacent edges of model casing.Loading system includes two sets of identical charging assemblies and is loaded for power loop control；Monitoring system includes data collector, and data collector is respectively connected to dynamometer, foil gauge and displacement sensor by cable.The utility model can simulate the cyclic loads effects such as offshore pile basis wind-engaging sudden and violent load, wave load in model casing.The arrangement achieves the CYCLIC LOADINGs of two orthogonal horizontal directions, realize real simulation.Different two-dimensional level cyclic loads is exported by changing the conditions such as load amplitude, cycle frequency, cycle-index, simulates the superposition of load under a variety of natural conditions.
Description
Technical field
The utility model is about ocean pile foundation engineering research field, is related to a kind of two-dimensional level tested based on model casing
Bidirectional circulating load loading device.
Background technology
With the continuous expansion of ocean development construction, the ocean engineering construction based on stake is more and more, such as sea turn
Power generator, offshore oil drilling platform, power transmission tower etc..Under afloat particular surroundings, as the Long-term Cyclic Loading of stormy waves is made
With bringing very big challenge to the design of pile foundation.Cyclic load can lead to pile peripheral earth accumulated deformation and plastic strain
Increase so that superstructure tilts excessive, pile peripheral earth Stiffness, and bearing capacity of pile foundation reduces.
Due to the complexity of marine natural situation, acting on the directions such as wave load, the wind load in pile foundation level direction has
Not confirmability, offshore platform pile foundation has the cyclic load that subject horizontal bidirectional in the case of a big chunk, relative to previous
One-dimensional horizontal CYCLIC LOADING research, apply two-way horizontal cyclic load to Yu Haiyang pile foundation recycle reduction rule research have more
Authenticity and accuracy.Biaxial loadings are acted on so that being substantially change under the more unidirectional load action of bearing capacity of stake.It is followed two-way
Under ring load action, the strength and stiffness of stake have larger difference compared with one-way circulation load action.
However it is very limited for the research of the stake by two-way horizontal cyclic load at present, in Practical Project in order to ensure
Safety takes the method for amplification safety coefficient, so as to produce larger waste.Therefore, research pile foundation is recycled in two-way horizontal
Character under load action changes, and has larger benefit for improving social benefit and economic interests.
Utility model content
The technical problems to be solved in the utility model is to overcome the deficiencies in the prior art, is provided a kind of based on mould
The horizontal bidirectional cyclic load loading device of molding box.
To solve technical problem, the solution of the utility model is：
A kind of horizontal bidirectional cyclic load loading device based on model casing is provided, including model casing, loading system and prison
Examining system, the concrete structure and connection relation of each system are：
The model casing is open-topped cube box-structure, inner lower filling soil layer, soil layer surface and case
Space dress water between body upper limb；First fixed pulley is respectively provided on two adjacent edges of model casing；Model casing
Center is equipped with a Model Pile, and lower half portion is inserted vertically into soil layer；
The loading system includes two sets of identical charging assemblies：There are one power loop controls in charging assembly to load
Device, power loop control loading device include fixed pedestal, two stents being connected with shaft are set on pedestal；The shaft is passed through
The through-hole being arranged on rectangle balance twin beams, enables balance twin beams to be swung centered on shaft；The balance of shaft both sides
Twin beams is asymmetric, wherein the end of slightly shorter lateral balance twin beams is equipped with counterpoise；The end of a slightly long lateral balance twin beams
Top is equipped with motor, and motor shaft vertical is passed down through the end of balance twin beams；The bull stick of a piece horizontal direction, one end of which is fixed on
The end of motor shaft, the other end fixes dress, and there are one counterweights；Motor and balance twin beams shaft between, be fixed with one with
Shaft parallel cross bar is equipped with the second fixed pulley on cross bar；One end that motor is housed on twin beams is balanced far from Model Pile, equipped with flat
One end of weighing apparatus counterweight is close to Model Pile；One end of first steel strand wires is fixed on by the second fixed pulley on pedestal, and the other end is fixed
On the draw ring at the top of Model Pile；One end of second steel strand wires is fixed on the draw ring at the top of Model Pile, and the other end passes through first
Weights are connected after fixed pulley；First steel strand wires and the second fixed pulley, Model Pile, the second steel strand wires, the first fixed pulley institute shape
Into line be a straight line perpendicular to model casing edge, and the line in two sets of charging assemblies is also orthogonal；
The monitoring system includes data collector, and data collector is respectively connected to dynamometer, foil gauge by cable
And displacement sensor；Wherein, it there are two dynamometers, is attached separately on the first steel strand wires in two sets of charging assemblies；Foil gauge has
It is multiple, be pasted onto on the outside of the Model Pile in soil layer by load axis, it is and evenly distributed in stake length direction, in stake diameter
Arrangement on direction is identical with horizontal bidirectional load-bearing direction；Displacement sensor is mounted in the cable between Model Pile and model chamber interior wall
On, which is located at the lower section of the second steel strand wires.
In the utility model, the stock on two adjacent vertical edges of model casing respectively equipped with a horizontal direction, institute
State the centre that the first fixed pulley is mounted in stock.
It is described to have more for the line of installing displacement sensor in the utility model, on every cable respectively there are one dresses
Displacement sensor；The cable is located at the part that Model Pile exposes soil layer, and 10cm is spaced between neighbouring both threads cable.
In the utility model, four sides of the model casing and bottom are steel plate；The bottom of four sides is equipped with equal
The osculum of even arrangement is equipped with strainer in osculum.
In the utility model, the Model Pile is hollow steel pipe, with the cable that each foil gauge connects across Model Pile
Connect behind inner cavity with data collector.
In the utility model, the draw ring at the top of the Model Pile includes being buckled in the steel hat shape ontology at the top of Model Pile,
Outside is connected with the round draw ring for being mutually perpendicular to four direction.
In the utility model, the data collector is computer.
The method that wave load load test is carried out using device described in the utility model, is included the following steps：
(1) it bankets
Soil layer is divided into the sandy gravel stratum of lower floor and the clay layer on upper strata；The sandy gravel stratum of the first laying depth 10cm in model casing,
Then permeable geotextiles are laid on sandy gravel stratum, recharge clay；The filling of clay is carried out by layer, the 15~20cm that often bankets compactings
And water filling, make the abundant saturation of the soil body；Next layer of clay is filled out after standing again, after the completion of every layer of soil filling, ensures the surface water of soil layer
It is flat, and shaving processing is carried out before filling is continued, it avoids artificially being layered；The final upper surface of soil layer is less than the upper limb of model casing
At least more than 10cm；
(2) it consolidates
After the completion of soil layer filling, it is abound with preloading on its surface and is consolidated；Record consolidation time simultaneously tests the degree of consolidation, adopts
Degree of consolidation judgement is carried out with penetration test, the control degree of consolidation is in the range of 85%~93%；In consolidation process, according to experiment
Need to open or close the osculum of model casing bottom, for simulating the process of saturation not draining or saturation draining；It has consolidated
Cheng Hou is laid with permeable geotextiles on model casing soil layer surface；
(3) it is packed into Model Pile
It is needed that piles with different diameter and the steel pipe of length is selected to contact with clay in Model Pile outer as Model Pile according to experiment
Surface mount foil gauge, evenly distributed in stake length direction, the arrangement of stake diameter direction is identical with horizontal bidirectional load-bearing direction, foil gauge
Outside applies epoxy resin and is protected, and foil gauge conducting wire is pierced by out of Model Pile；By the consolidation soil of Model Pile press-in designated position
It is interior, Model Pile embedded depth is determined according to different tests type and stake diameter size, so that it is determined that dress soil height.Expose in Model Pile
Displacement sensor is installed on cable between the part of soil layer and model chamber interior wall；
(4) instrument and equipment is installed
A, the mounting bracket on pedestal links together balance twin beams, shaft and stent, in balance twin beams one end successively
Motor, bull stick and counterweight are installed, temporarily fixed bull stick is allowed to perpendicular to equalizer bar；In balance twin beams other end installation balance weight
Code, ensures balance of the entire power loop control loading device before CYCLIC LOADING；
B, Model Pile exposure is protected in fixed model stake in the support of the upper part horizontal direction of soil layer temporarily to fix
Model of a syndrome stake be not subjected to displacement before by cyclic load；
C, steel strand wires are connected, the second steel strand wires and stake end draw ring are connected first, then increase weights；Then
Connect the first steel strand wires；
D, entire loading device balance is adjusted, removes the horizontally-supported of fixed model stake, adjustment counterpoise is double in balance
The position of beam one end, until dynamometer reading is consistent with the value of weights, ensure CYCLIC LOADING system before being initiated be
System balance；
E, dynamometer line is arranged, itself and data collector are connected；
F, the step of repeating more than a-e installs the charging assembly in another horizontal vertical direction；
(5) water filling
Water is injected to soil layer superjacent air space, the height of the final water surface is made to be maintained at 10cm；
(6) it is tested
Set the cyclic load frequency of motor and the frequency acquisition of data collector, dynamometer, foil gauge and displacement sensing
Device collects the data monitored and is sent to data collector, and real-time display simultaneously records test data；It is set before experiment is reached
Cyclic load loading number or stake top add up horizontal displacement more than setting value make pile body occur unstable failure when, off-test,
Gained test data is used for post-processing.
When in by the consolidation soil of Model Pile press-in designated position, to protect the cable inside Model Pile, in Model Pile
It is additionally arranged at the bottom conical pullover.
Compared with prior art, the beneficial effects of the utility model are：
The utility model can simulate the cyclic loads effects such as offshore pile basis wind-engaging sudden and violent load, wave load in model casing
It should.Compared to other cyclic load loading devices, the arrangement achieves the CYCLIC LOADINGs of two orthogonal horizontal directions, real
Real simulation is showed.Different two-dimensional level cycles is exported by changing the conditions such as load amplitude, cycle frequency, cycle-index
Load simulates the superposition of load under a variety of natural conditions.
Description of the drawings
Fig. 1 is power loop control loading device schematic diagram.
Fig. 2 is the CYCLIC LOADING system longitudinal section in a direction.
Fig. 3 is loading system vertical view.
In figure label for：Model casing 1, sandy gravel stratum 2, clay layer 3, power loop control loading device 4, pedestal 5 balance twin beams
6, shaft 7, motor 8, bull stick 9, counterweight 10, counterpoise 11, weights 12, the first fixed pulley 13, the first steel strand wires 14, survey
Power meter 15, data collector 16, foil gauge 17, displacement sensor 18, Model Pile 19, stent 20, stock 21, the second fixed pulley
22。
Specific embodiment
The utility model is described in further detail below in conjunction with the accompanying drawings：
Horizontal bidirectional cyclic load loading device based on model casing including model casing 1, loading system and monitors system,
The concrete structure and connection relation of each system be：
Model casing 1 is open-topped cube box-structure, inner lower filling soil layer, on soil layer surface and babinet
Space dress water between edge；Four sides of model casing 1 and bottom are steel plate；The bottom of four sides is equipped with what is be evenly arranged
Osculum is equipped with strainer in osculum.Soil layer is divided into the sandy gravel stratum 2 of lower floor and the clay layer 3 on upper strata, and 2 thickness of sandy gravel stratum is
10cm, distance is at least 10cm between the surface of clay layer 3 and babinet upper limb；On two adjacent vertical edges of model casing 1
Stock 21 respectively equipped with a horizontal direction, the centre of stock 21 is respectively provided with first fixed pulley 13；The center of model casing 1
Equipped with a Model Pile 19, lower half portion is inserted vertically into soil layer.
The loading system includes two sets of identical charging assemblies：There are one power loop controls in charging assembly to load
Device 4, power loop control loading device include fixed pedestal 5, two stents 20 being connected with shaft 7 are set on pedestal 5；It should
Shaft 7 runs through the through-hole being set on balance twin beams 6, and balance twin beams 6 is enable to be swung centered on shaft 7；7 both sides of shaft
Balance twin beams 6 is asymmetric, wherein the end of slightly shorter lateral balance twin beams 6 is equipped with counterpoise 11；A slightly long lateral balance is double
Equipped with motor 8 above the end of beam 6, motor shaft vertical is passed down through the end of balance twin beams 6；The bull stick 9 of a piece horizontal direction,
One end of which is fixed on the end of motor shaft, the other end fixes dress, and there are one counterweights 10；Motor 8 with balance twin beams 6 shaft 7 it
Between, a cross bar parallel with shaft 7 is fixed with, the second fixed pulley 22 is housed on cross bar；It balances and motor 8 is housed on twin beams 6
One end far from Model Pile 19, one end equipped with counterpoise 11 is close to Model Pile 19；One end of first steel strand wires 14 passes through
Two fixed pulleys 22 are fixed on pedestal 5, and the other end is fixed on the draw ring at 19 top of Model Pile；One end of second steel strand wires 22 is consolidated
It is scheduled on the draw ring at 19 top of Model Pile, the other end is by connecting weights 12 after the first fixed pulley 13；19 top of Model Pile
Draw ring include the steel hat shape ontology for being buckled in the top of Model Pile 19, outside, which is connected with, to be mutually perpendicular to the round of four direction and draws
Ring.The line that first steel strand wires 14 are formed with the second fixed pulley 22, Model Pile 19, the second steel strand wires, the first fixed pulley 13 is
One straight line perpendicular to 1 edge of model casing, and the line in two sets of charging assemblies is also orthogonal；
The monitoring system includes data collector 16 (computer), and data collector 16 is respectively connected to survey by cable
Power meter 15, foil gauge 17 and displacement sensor 18；Wherein, there are two dynamometers 15, be attached separately in two sets of charging assemblies
On one steel strand wires 14；Foil gauge 17 have it is multiple, be pasted onto the outside of Model Pile 19 in soil layer by load axis, and
Evenly distributed in stake length direction, the arrangement on stake diameter direction is identical with horizontal bidirectional load-bearing direction；Model Pile 19 is hollow steel
Pipe, the cable to connect with each foil gauge 17 connect behind the inner cavity across Model Pile 19 with data collector 16.Displacement sensor
On 18 cable between 1 inner wall of Model Pile 19 and model casing, the cable for installing displacement sensor 18 has more, every
Respectively there are one displacement sensors 18 for dress on cable；The cable be located at Model Pile 19 expose soil layer part, neighbouring two
10cm is spaced between cable, all cables are respectively positioned on the lower section of the second steel strand wires.
The method that wave load load test is carried out using device described in the utility model, is included the following steps：
(1) it bankets
Soil layer is divided into the sandy gravel stratum 2 of lower floor and the clay layer 3 on upper strata；The gravel of the first laying depth 10cm in model casing 1
Then layer 2 is laid with permeable geotextiles on sandy gravel stratum 2, recharge clay 3；The filling of clay is carried out by layer, often banket 15~
20cm compactings and water filling, make the abundant saturation of the soil body；Next layer of clay is filled out after standing again, after the completion of every layer of soil filling, ensures soil layer
Surface it is horizontal, and shaving processing is carried out before filling is continued, avoids artificially being layered；The final upper surface of soil layer is less than model
The upper limb of case 1 at least more than 10cm；
(2) it consolidates
After the completion of soil layer filling, it is abound with preloading on its surface and is consolidated；Record consolidation time simultaneously tests the degree of consolidation, adopts
Degree of consolidation judgement is carried out with penetration test, the control degree of consolidation is in the range of 85%~93%；In consolidation process, according to experiment
Need to open or close the osculum of 1 bottom of model casing, for simulating the process of saturation not draining or saturation draining；It has consolidated
Cheng Hou is laid with permeable geotextiles on 1 soil layer surface of model casing；
(3) it is packed into Model Pile
According to experiment need that piles with different diameter and the steel pipe of length is selected to contact with clay in Model Pile 19 as Model Pile 19
Outer surface paste foil gauge 17, it is evenly distributed in stake length direction, stake diameter direction arrangement it is identical with horizontal bidirectional load-bearing direction, answer
The outside painting epoxy resin for becoming piece 17 is protected, and 17 conducting wire of foil gauge is pierced by out of Model Pile 19；The press-in of Model Pile 19 is referred to
It positions in the consolidation soil put, exposes in Model Pile 19 and displacement biography is installed on the cable between 1 inner wall of part and model casing of soil layer
Sensor 18；When Model Pile 19 is pressed into the consolidation soil of designated position, to protect the cable inside Model Pile 19, in Model Pile 19
Be additionally arranged at the bottom conical pullover.
(4) instrument and equipment is installed
A, the mounting bracket 20 on pedestal 5 links together balance twin beams 6, shaft 7 and stent 20, in balance twin beams 6
Motor 8, bull stick 9 and counterweight 10 are installed in one end successively, and temporarily fixed bull stick 9 is allowed to perpendicular to balance twin beams 6；In balance twin beams 6
The other end installs counterpoise 11, ensures balance of the entire power loop control loading device 4 before CYCLIC LOADING；
B, fixed model stake 19, to 19 exposure of Model Pile in the upper part horizontal direction of soil layer support with temporarily solid
It is fixed, ensure that Model Pile 19 be not subjected to displacement before by cyclic load；
C, steel strand wires are connected, first connect the second steel strand wires and stake end draw ring, then increase weights 12；So
After connect the first steel strand wires 14；
D, entire loading device balance is adjusted, removes the horizontally-supported of fixed model stake 19, adjustment counterpoise 11 is flat
The position of 6 one end of weighing apparatus twin beams, until 15 reading of dynamometer is consistent with the value of weights 12, guarantee CYCLIC LOADING system is starting
System balancing before；
E, 15 line of dynamometer is arranged, itself and data collector 16 are connected；
F, the step of repeating more than a-e installs the charging assembly in another horizontal vertical direction；
(5) water filling
Water is injected to soil layer superjacent air space, the height of the final water surface is made to be maintained at 10cm；
(6) it is tested
Set the cyclic load frequency of motor 8 and the frequency acquisition of data collector 16, dynamometer 15, foil gauge 17 and position
Displacement sensor 18 collects the data monitored and is sent to data collector 16, and real-time display simultaneously records test data；When reaching
The cyclic load loading number or stake top set before experiment adds up horizontal displacement makes pile body that unstable failure occur more than setting value
When, off-test, gained test data is used for post-processing.
During experiment, by applying two-way horizontal cyclic load to Model Pile and monitoring in real time, research model stake exists
Working characteristics, bearing capacity reduction situation under two-way horizontal cyclic load and the coverage to the periphery soil body.Two sets add
Power loop control loading device 4 in load component is into horizontal vertical direction arrangement, the cyclic load F that can be provided, and size is：In formula, L1It is grown for bull stick 9, L2For distance, m between shaft 7 and fixed pulley 13 on pedestal 5aFor weight
10 mass of code, T are the intrinsic torque of power loop control loading device 4, and M is 9 mass of bull stick.
Horizontal bidirectional cyclic load loading device in the utility model is easy to process, and Standard is simple, has certain
Scientific research promotional value.The above is the preferred embodiment of the utility model, it should be pointed out that：For the general of the art
For logical technical staff, under the premise of the utility model principle is not departed from, several improvements and modifications can also be made, these change
The scope of protection of the utility model is also should be regarded as into retouching.
Claims (7)
1. a kind of horizontal bidirectional cyclic load loading device based on model casing, including model casing；Add it is characterized in that, further including
Loading system and monitoring system, the concrete structure and connection relation of each system are：
The model casing is open-topped cube box-structure, inner lower filling soil layer, on soil layer surface and babinet
Space dress water between edge；First fixed pulley is respectively provided on two adjacent edges of model casing；The center of model casing
Equipped with a Model Pile, lower half portion is inserted vertically into soil layer；
The loading system includes two sets of identical charging assemblies：There are one power loop control loading dresses in charging assembly
It puts, power loop control loading device includes fixed pedestal, and two stents being connected with shaft are set on pedestal；The shaft runs through
Through-hole on rectangle balance twin beams, enables balance twin beams to be swung centered on shaft；The balance of shaft both sides is double
Beam is asymmetric, wherein the end of slightly shorter lateral balance twin beams is equipped with counterpoise；On the end of a slightly long lateral balance twin beams
Equipped with motor, motor shaft vertical is passed down through the end of balance twin beams for side；The bull stick of a piece horizontal direction, one end of which is fixed on electricity
The end of arbor, the other end fixes dress, and there are one counterweights；Between the shaft of motor and balance twin beams, one is fixed with turning
Axis parallel cross bar is equipped with the second fixed pulley on cross bar；One end that motor is housed on twin beams is balanced far from Model Pile, equipped with balance
One end of counterweight is close to Model Pile；One end of first steel strand wires is fixed on by the second fixed pulley on pedestal, and the other end is fixed on
On draw ring at the top of Model Pile；One end of second steel strand wires is fixed on the draw ring at the top of Model Pile, and the other end is fixed by first
Weights are connected after pulley；First steel strand wires are formed with the second fixed pulley, Model Pile, the second steel strand wires, the first fixed pulley
Line be a straight line perpendicular to model casing edge, and the line in two sets of charging assemblies is also orthogonal；
The monitoring system includes data collector, and data collector is respectively connected to dynamometer, foil gauge and position by cable
Displacement sensor；Wherein, it there are two dynamometers, is attached separately on the first steel strand wires in two sets of charging assemblies；Foil gauge have it is multiple,
Be pasted onto on the outside of the Model Pile in the soil layer by load axis, it is and evenly distributed in stake length direction, in stake diameter direction
On arrangement it is identical with horizontal bidirectional load-bearing direction；Displacement sensor is mounted on the cable between Model Pile and model chamber interior wall,
The cable is located at the lower section of the second steel strand wires.
2. the apparatus according to claim 1, which is characterized in that one is respectively equipped on two adjacent vertical edges of model casing
The stock of root horizontal direction, first fixed pulley are mounted in the centre of stock.
3. the apparatus according to claim 1, which is characterized in that the cable for installing displacement sensor has more,
Respectively there are one displacement sensors for dress on every cable；The line be located at Model Pile expose soil layer part, neighbouring two
10cm is spaced between cable.
4. the apparatus according to claim 1, which is characterized in that four sides of the model casing and bottom are steel plate；
The bottom of four sides is equipped with the osculum being evenly arranged, and strainer is housed in osculum.
5. the apparatus according to claim 1, which is characterized in that the Model Pile is hollow steel pipe, is connected with each foil gauge
Cable connect behind the inner cavity across Model Pile with data collector.
6. the apparatus according to claim 1, which is characterized in that the draw ring at the top of the Model Pile includes being buckled in model stake top
The steel hat shape ontology in portion, outside are connected with the round draw ring for being mutually perpendicular to four direction.
7. the apparatus according to claim 1, which is characterized in that the data collector is computer.
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| CN201721509964.4U CN207499007U (en) | 2017-11-11 | 2017-11-11 | Horizontal bidirectional cyclic load loading device based on model casing |
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| CN201721509964.4U CN207499007U (en) | 2017-11-11 | 2017-11-11 | Horizontal bidirectional cyclic load loading device based on model casing |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107829451A (en) * | 2017-11-11 | 2018-03-23 | 广州环保投资集团有限公司 | Horizontal bidirectional cyclic load loading device and test method based on model casing |
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2017
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107829451A (en) * | 2017-11-11 | 2018-03-23 | 广州环保投资集团有限公司 | Horizontal bidirectional cyclic load loading device and test method based on model casing |
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