CN109024713A - Simulate clump of piles dynamic effect and the coefficient device of Pile Soil and its analogy method - Google Patents
Simulate clump of piles dynamic effect and the coefficient device of Pile Soil and its analogy method Download PDFInfo
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- CN109024713A CN109024713A CN201810604324.4A CN201810604324A CN109024713A CN 109024713 A CN109024713 A CN 109024713A CN 201810604324 A CN201810604324 A CN 201810604324A CN 109024713 A CN109024713 A CN 109024713A
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D33/00—Testing foundations or foundation structures
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D27/00—Foundations as substructures
- E02D27/10—Deep foundations
- E02D27/12—Pile foundations
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- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Mining & Mineral Resources (AREA)
- Paleontology (AREA)
- Civil Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Investigation Of Foundation Soil And Reinforcement Of Foundation Soil By Compacting Or Drainage (AREA)
Abstract
The invention discloses a kind of simulation clump of piles dynamic effects and the coefficient device of Pile Soil, the simulation clump of piles dynamic effect and the coefficient device of Pile Soil include shaking platform, the superstructure equivalent model for being installed on by rigid constraint the shaking platform, the pile foundation model for being fixed on by elastic restraint the superstructure equivalent model and the container equipped with medium for simulating soil model, the pile foundation model is inserted into the soil model, the vibration that the shaking platform is used to that superstructure equivalent model to be driven to carry out one or more forms.The present invention can simulate influence of a variety of dynamic responses of wood engineering field superstructure to substructure (single-pile foundation, multi-column pier foundation) etc., so as to the dynamic response and Pile Soil collective effect for studying the multi-column pier foundation when superstructure meets with power effect.
Description
Technical field
The present invention relates to vibration simulation technical fields, common more particularly to a kind of simulation clump of piles dynamic effect and Pile Soil
The device of effect.
Background technique
The safety on basis is the first layer barrier of building safety, and safety is the premise of structure general safety, studies base
Plinth is of great significance safely.The basis of the tall and slender structures such as skyscraper, electric power pylon generallys use the form of multi-column pier foundation,
Cost occupies biggish ratio in totality.One important research topic of multi-column pier foundation is that clump of piles dynamic response and Pile Soil are total
Same-action.High-rise structures superstructure generates dynamic response under power effect, and dynamic response is transmitted to infrastructure, brings
The problem of dynamic response and Pile Soil collective effect of pile foundation.The factor for causing structural vibration includes that wind etc. often meets power effect,
Load is assaulted including ship collision, aircraft impact and explosion etc..
Its dynamic response is studied by object of a clump of piles and the coefficient premise of Pile Soil is to need to make to occur between stake and soil
Relative displacement.The means for generating this relative displacement are by simple mechanical means or artificial mode in multi-column pier foundation at present
Model top applies a displacement.
Existing vibration simulation technology has the disadvantage in that
1) cannot consider transitive relation of the dynamic response to infrastructure of superstructure: existing means are directly to pass through machine
Tool measure applies a displacement at the top of pile foundation, and actual conditions are that superstructure is dynamic by the dynamic loads such as wind, shock, generation
Force-responsive, the dynamic response pass to lower part multi-column pier foundation by connection between superstructure and basis: superstructure -> on
Connection -> lower part multi-column pier foundation between substructure, it means that current clump of piles Study on dynamic response does not account for this biography
Pass relationship.
2) cannot simulate the multi-motion form that superstructure is likely to occur: existing means are directly to be applied by mechanical measure
Add a relative movement between stake and soil, be the simple repetition of single process, does not account for the different possibility of superstructure and go out
Existing forms of motion and its complete process.
3) can not achieve the accurate control of displacement: existing method can constantly repeat a single relative movement-
Reset-relative movement thereof, but this process not can be carried out and be accurately controlled, i.e. relative displacement in Pile Soil collective effect
Input cannot quantify well, this is unfavorable for the quantitative evaluation of the physical quantitys such as frictional force, extruding force between foundation deformation, stake soil.
Summary of the invention
In view of this, the purpose of the present invention is to provide one kind for simulating clump of piles dynamic effect and Pile Soil collective effect
Device.
To achieve the goals above, the technical solution that one embodiment of the invention provides is as follows:
A kind of simulation clump of piles dynamic effect and the coefficient device of Pile Soil, the simulation clump of piles dynamic effect and Pile Soil
Coefficient device include shaking platform, the superstructure equivalent model for being installed on by rigid constraint the shaking platform,
By elastic restraint be fixed on the superstructure equivalent model pile foundation model and for simulate soil model equipped with medium
Container, the pile foundation model is inserted into the soil model, and the shaking platform is for driving superstructure equivalent model to carry out
The vibration of one or more forms.
As a further improvement of the present invention, the pile foundation model includes pile body model, the pile body model and the soil
Connection between earth model is realized by the roughness of pile body model and the compactness of the medium.
As a further improvement of the present invention, the pile foundation model further includes stake top model, the stake top model with it is described
It is elastic restraint between soil model.
As a further improvement of the present invention, when needing soil types difference to be simulated, by the different containers
It is interior to place different types of media implementation.
As a further improvement of the present invention, when needing soil layering to be simulated, i.e. soil characteristic at different height
When different, by placing different types of media implementation into the same container.
As a further improvement of the present invention, the pile foundation model is laid with acceleration transducer and foil gauge, described to add
Velocity sensor and the foil gauge measure the pile foundation model as caused by the dynamic response of superstructure equivalent model
Dynamic response.
As a further improvement of the present invention, the contact surface of the pile foundation model and the soil model is laid with sensing
Device, frictional force and extruding force on sensor measurement Pile-soil contact face.
As a further improvement of the present invention, sensor is laid in the soil model, the sensor is for measuring
The deformation of surrounding soil.
As a further improvement of the present invention, the vibration of the superstructure equivalent model be sidesway, sinking, on pull out, turn round
Turn one of or a variety of couplings.
A kind of simulation clump of piles dynamic effect and the coefficient method of Pile Soil, comprising the following steps:
The simulation of superstructure vibration: superstructure is equivalent at rigid model, the vibration occurred under dynamic load function
It is dynamic to be realized by shaking platform；
The connection of superstructure and pile foundation: superstructure is connect with pile foundation by elastic restraint, and coupling stiffness is tied by top
The characteristics of structure and substructure, codetermines；
The simulation of soil class where pile foundation: the simulation by being packed into media implementation soil class in a reservoir；
The connection of pile foundation and ground: pile foundation and the connection of ground include 2 aspects: contact of the stake top with ground and pile body with
The contact of ground, contact of the stake top with ground realize that contact of the pile body with ground is by changing the thick of pile body by elastic connection
Compaction's realization of rough degree, surrounding soil；
The measurement of clump of piles dynamic response: laying acceleration transducer and foil gauge in pile foundation model, and measurement is tied by top
The dynamic response of multi-column pier foundation caused by the dynamic response of structure；
The measurement of pile soil common action size: sensor is laid in the contact surface of pile foundation model and ground, measures Pile Soil
Frictional force and extruding force on contact surface, sensor is laid around in ground, measure the deformation of surrounding soil.
The invention has the following advantages that
The present invention can simulate the dynamic response of field of civil engineering superstructure to substructure (single-pile foundation, a clump of piles
Basis) etc. influence, so as to for study superstructure meet with power act on when multi-column pier foundation dynamic response and stake-
Native collective effect:
1) consider transitive relation of the dynamic response to infrastructure of superstructure.Top is tied by vibration bringing device
Structure equivalent model applies scheduled displacement time-histories excitation, which passes through the connection between superstructure and basis, transmitting
Lower part multi-column pier foundation is given, fully considers connection -> lower part multi-column pier foundation of the dynamic response between superstructure -> top and the bottom structure
This transitive relation.
2) the multi-motion form that simulation superstructure is likely to occur, is calculated by field measurement or finite element method
Superstructure base dynamic response can be applied on model.
3) the accurate control for realizing displacement, is accurately controlled the shifted version and size of superstructure, this is conducive to
It repeats the progress of test and the physical quantitys such as frictional force, extruding force between multi-column pier foundation dynamic response, foundation deformation, stake soil is quantified
Change evaluation.
Detailed description of the invention
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technical description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this
The some embodiments recorded in invention, for those of ordinary skill in the art, without creative efforts,
It is also possible to obtain other drawings based on these drawings.
Fig. 1 is the perspective view that clump of piles dynamic effect and the coefficient device of Pile Soil are simulated in first embodiment of the invention；
Fig. 2 is that simulation clump of piles dynamic effect and the structure of the coefficient device of Pile Soil are shown in first embodiment of the invention
It is intended to；
Fig. 3 is the use shape that clump of piles dynamic effect and the coefficient device of Pile Soil are simulated in first embodiment of the invention
State schematic diagram.
In figure: 100, simulating clump of piles dynamic effect and the coefficient device of Pile Soil；10, container；20, shaking platform；
30, superstructure equivalent model；40, pile foundation model；42, pile body model；44, stake top model.
Specific embodiment
Technical solution in order to enable those skilled in the art to better understand the present invention, below in conjunction with of the invention real
The attached drawing in example is applied, technical scheme in the embodiment of the invention is clearly and completely described, it is clear that described implementation
Example is only a part of the embodiment of the present invention, instead of all the embodiments.Based on the embodiments of the present invention, this field is common
Technical staff's every other embodiment obtained without making creative work, all should belong to protection of the present invention
Range.
It should be noted that it can be directly on another component when component is referred to as " being fixed on " another component
Or there may also be components placed in the middle.When a component is considered as " connection " another component, it, which can be, is directly connected to
To another component or it may be simultaneously present component placed in the middle.When a component is considered as " being set to " another component, it
It can be and be set up directly on another component or may be simultaneously present component placed in the middle.Term as used herein is " vertical
", " horizontal ", "left", "right" and similar statement for illustrative purposes only.
Unless otherwise defined, all technical and scientific terms used herein and belong to technical field of the invention
The normally understood meaning of technical staff is identical.Term as used herein in the specification of the present invention is intended merely to description tool
The purpose of the embodiment of body, it is not intended that in the limitation present invention.Term " and or " used herein includes one or more phases
Any and all combinations of the listed item of pass.
It please refers to Fig.1 to Fig.3, the present invention simulates clump of piles dynamic effect and the coefficient device 100 of Pile Soil includes being used for
Simulate the container 10 equipped with medium of soil model, shaking platform 20, the top for being installed on by rigid constraint shaking platform 20
Structure equivalent model 30, the pile foundation model 40 that superstructure equivalent model 30 is fixed on by elastic restraint, pile foundation model 40 are inserted
Enter soil model, the vibration that shaking platform 20 is used to that superstructure equivalent model to be driven to carry out one or more forms.
Building in different places, soil class locating for pile foundation is different, different types of soil can by
The media implementation of different characteristics is packed into different vessels 10, in some grounds, soil is layering, i.e. soil at different height
Characteristic is different, and such case can be by holding different media implementations in same container 10.
Shaking platform 20 can drive superstructure equivalent model 30 vibration be sidesway, sinking, on pull out, reverse in one
Kind or a variety of couplings.
Pile foundation model 40 includes pile body model 42 and stake top model 44, and the connection between pile body model 42 and soil model is logical
It crosses the roughness for changing pile body model 42 and soil packing degree is realized.Be between stake top model 44 and soil model elasticity about
Beam.
Pile foundation model 40 is laid with acceleration transducer and foil gauge, and acceleration transducer and foil gauge measurement are tied by top
The dynamic response of pile foundation model caused by the dynamic response of structure equivalent model 30.Contact table of the pile foundation model 40 with soil model
Face is laid with sensor, for measuring frictional force and extruding force on Pile-soil contact face.Sensor is laid in soil model,
For measuring the deformation of surrounding soil.
The invention further relates to a kind of simulation clump of piles dynamic effects and the coefficient method of Pile Soil, comprising the following steps:
1) simulation of superstructure vibration
Superstructure is equivalent to a rigid body (for superstructure equivalent model), and superstructure bottom is in dynamic load function
The vibration of lower generation is realized by shaking platform.These vibration modes include the sidesway of superstructure, sinking, on pull out, reverse
And mutual any combination between them.
2) determination of superstructure equivalent model size.The length-width ratio of equivalent rigid model is determines according to actual conditions, main
It will be in order to cooperate the size of practical structures and the arrangement of multi-column pier foundation.
2) connection of superstructure and pile foundation model.The two is connected by elastic restraint, coupling stiffness by superstructure and
The characteristics of substructure, codetermines, including superstructure type and size, pile supported platform size and construction method etc..
3) simulation of the pile foundation model in soil class.Building in different places, soil locating for pile foundation model
Classification is different, and different types of soil can be by being packed into the media implementations of different characteristics in a reservoir.In some grounds, soil
It is layering, i.e., the soil characteristic at different height is different, and such case can be real by holding different media in a reservoir
It is existing.
4) multi-column pier foundation pile foundation pattern number purpose is simulated.The quantity of single pile controls the number control by model in pile foundation model
System realizes that actual number can be determined according to specific research object and research purpose.
5) connection of pile foundation model and soil model.The connection of pile foundation model and soil model include 2 aspect: stake top with
Contact of the contact and pile body of ground with soil model.Contact of the stake top with soil model by elastic connection realize, pile body with
The contact of soil model is by changing the degree of roughness of pile body, compaction's realization of surrounding medium.
6) measurement of clump of piles dynamic response.Acceleration transducer and foil gauge are laid in pile foundation model, are measured by top
The dynamic response of multi-column pier foundation caused by the dynamic response of structure equivalent model.
7) measurement of pile soil common action size.The sensing such as foil gauge is laid in the contact surface of pile foundation model and ground
Device measures frictional force and extruding force on Pile-soil contact face, lays the sensors such as foil gauge, measurement surrounding in ground around
The deformation of soil.
As can be seen from the above technical solutions, the invention has the following advantages that
The present invention can simulate the dynamic response of field of civil engineering superstructure to substructure (single-pile foundation, a clump of piles
Basis) etc. influence, so as to for study superstructure equivalent model meet with power act on when multi-column pier foundation power
Response and Pile Soil collective effect:
1) consider transitive relation of the dynamic response to infrastructure of superstructure.Top is tied by vibration bringing device
Structure equivalent model applies scheduled displacement time-histories excitation, which passes through the connection between superstructure and basis, transmitting
Lower part multi-column pier foundation is given, fully considers connection -> lower part multi-column pier foundation of the dynamic response between superstructure -> top and the bottom structure
This transitive relation.
2) the multi-motion form that simulation superstructure is likely to occur, is calculated by field measurement or finite element method
Superstructure base dynamic response can be applied on model.
3) the accurate control for realizing displacement, is accurately controlled the shifted version and size of superstructure, this is conducive to
It repeats the progress of test and the physical quantitys such as frictional force, extruding force between multi-column pier foundation dynamic response, foundation deformation, stake soil is quantified
Change evaluation.
It is obvious to a person skilled in the art that invention is not limited to the details of the above exemplary embodiments, Er Qie
In the case where without departing substantially from spirit or essential attributes of the invention, the present invention can be realized in other specific forms.Therefore, no matter
From the point of view of which point, the present embodiments are to be considered as illustrative and not restrictive, and the scope of the present invention is by appended power
Benefit requires rather than above description limits, it is intended that all by what is fallen within the meaning and scope of the equivalent elements of the claims
Variation is included within the present invention.Any reference signs in the claims should not be construed as limiting the involved claims.
In addition, it should be understood that although this specification is described in terms of embodiments, but not each embodiment is only wrapped
Containing an independent technical solution, this description of the specification is merely for the sake of clarity, and those skilled in the art should
It considers the specification as a whole, the technical solutions in the various embodiments may also be suitably combined, forms those skilled in the art
The other embodiments being understood that.
Claims (10)
1. a kind of simulation clump of piles dynamic effect and the coefficient device of Pile Soil, it is characterised in that: the simulation clump of piles power effect
It should include shaking platform, the superstructure for being installed on by rigid constraint the shaking platform with the coefficient device of Pile Soil
Equivalent model is fixed on the pile foundation model of the superstructure equivalent model by elastic restraint and for simulating soil model
The container equipped with medium, the pile foundation model is inserted into the soil model, and the shaking platform is for driving superstructure etc.
Effect model carries out the vibration of one or more forms.
2. simulation clump of piles dynamic effect according to claim 1 and the coefficient device of Pile Soil, it is characterised in that: institute
Stating pile foundation model includes pile body model, and the connection between the pile body model and the soil model passes through the coarse of pile body model
The compactness of degree and the medium is realized.
3. simulation clump of piles dynamic effect according to claim 2 and the coefficient device of Pile Soil, it is characterised in that: institute
Stating pile foundation model further includes stake top model, is elastic restraint between the stake top model and the soil model.
4. simulation clump of piles dynamic effect according to claim 1 and the coefficient device of Pile Soil, it is characterised in that: when
When needing soil types difference to be simulated, by placing different types of media implementation into the different containers.
5. simulation clump of piles dynamic effect according to claim 1 and the coefficient device of Pile Soil, it is characterised in that: when
When needing soil layering to be simulated, i.e., when soil characteristic difference at different height, by being placed not into the same container
The media implementation of same type.
6. simulation clump of piles dynamic effect according to claim 1 and the coefficient device of Pile Soil, it is characterised in that: institute
It states pile foundation model and is laid with acceleration transducer and foil gauge, the acceleration transducer and foil gauge measurement are tied by top
The dynamic response of the pile foundation model caused by the dynamic response of structure equivalent model.
7. simulation clump of piles dynamic effect according to claim 1 and the coefficient device of Pile Soil, it is characterised in that: institute
The contact surface for stating pile foundation model and the soil model is laid with sensor, on sensor measurement Pile-soil contact face
Frictional force and extruding force.
8. simulation clump of piles dynamic effect according to claim 1 and the coefficient device of Pile Soil, it is characterised in that: institute
It states and is laid with sensor in soil model, the sensor is used to measure the deformation of surrounding soil.
9. simulation clump of piles dynamic effect according to claim 1 and the coefficient device of Pile Soil, it is characterised in that: institute
State superstructure equivalent model vibration be sidesway, sinking, on one of pull out, reverse or a variety of couplings.
10. a kind of simulation clump of piles dynamic effect and the coefficient method of Pile Soil, which comprises the following steps:
The simulation of superstructure vibration: superstructure is equivalent at rigid model, and the vibration occurred under dynamic load function is equal
It is realized by shaking platform；
The connection of superstructure and pile foundation: superstructure is connect with pile foundation by elastic restraint, coupling stiffness by superstructure and
The characteristics of substructure, codetermines；
The simulation of soil class where pile foundation: the simulation by being packed into media implementation soil class in a reservoir；
The connection of pile foundation and ground: pile foundation includes 2 aspects: contact and pile body and ground of the stake top with ground with the connection of ground
Contact, contact of the stake top with ground by elastic connection realize, contact of the pile body with ground by change pile body coarse journey
Compaction's realization of degree, surrounding soil；
The measurement of clump of piles dynamic response: laying acceleration transducer and foil gauge in pile foundation model, measures by superstructure
The dynamic response of multi-column pier foundation caused by dynamic response；
The measurement of pile soil common action size: sensor is laid in the contact surface of pile foundation model and ground, measures Pile-soil contact
Frictional force and extruding force on face, sensor is laid around in ground, measure the deformation of surrounding soil.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201810604324.4A CN109024713A (en) | 2018-06-12 | 2018-06-12 | Simulate clump of piles dynamic effect and the coefficient device of Pile Soil and its analogy method |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201810604324.4A CN109024713A (en) | 2018-06-12 | 2018-06-12 | Simulate clump of piles dynamic effect and the coefficient device of Pile Soil and its analogy method |
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| CN203639954U (en) * | 2013-09-18 | 2014-06-11 | 中交公路长大桥建设国家工程研究中心有限公司 | Test platform for tri-directional static and dynamic loading model of bridge deep water foundation |
| CN204753656U (en) * | 2015-06-05 | 2015-11-11 | 山东科技大学 | A clump of piles - soil - structure interact experimental model directly replaces to one side |
| CN206503172U (en) * | 2017-02-28 | 2017-09-19 | 山东大学 | Study the combined type proportional loading experimental rig of pile-soil interaction |
| CN207194039U (en) * | 2017-07-06 | 2018-04-06 | 扬州大学 | Piled-box foundaton horizontal cyclic load testing machine |
| CN207469324U (en) * | 2017-11-10 | 2018-06-08 | 中国科学院武汉岩土力学研究所 | A kind of soil body and pile foundation interaction model experimental rig |
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2018
- 2018-06-12 CN CN201810604324.4A patent/CN109024713A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN203639954U (en) * | 2013-09-18 | 2014-06-11 | 中交公路长大桥建设国家工程研究中心有限公司 | Test platform for tri-directional static and dynamic loading model of bridge deep water foundation |
| CN204753656U (en) * | 2015-06-05 | 2015-11-11 | 山东科技大学 | A clump of piles - soil - structure interact experimental model directly replaces to one side |
| CN206503172U (en) * | 2017-02-28 | 2017-09-19 | 山东大学 | Study the combined type proportional loading experimental rig of pile-soil interaction |
| CN207194039U (en) * | 2017-07-06 | 2018-04-06 | 扬州大学 | Piled-box foundaton horizontal cyclic load testing machine |
| CN207469324U (en) * | 2017-11-10 | 2018-06-08 | 中国科学院武汉岩土力学研究所 | A kind of soil body and pile foundation interaction model experimental rig |
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Application publication date: 20181218 |