CN109841138A - A kind of test model and method of the ground foundation simulation sedimentation with Distribution of Magnetic Field - Google Patents

A kind of test model and method of the ground foundation simulation sedimentation with Distribution of Magnetic Field Download PDF

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Publication number
CN109841138A
CN109841138A CN201910244669.8A CN201910244669A CN109841138A CN 109841138 A CN109841138 A CN 109841138A CN 201910244669 A CN201910244669 A CN 201910244669A CN 109841138 A CN109841138 A CN 109841138A
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China
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layer
distribution
iron filings
ground
simulation
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Pending
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CN201910244669.8A
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Chinese (zh)
Inventor
孔令圳
陈文鑫
罗佳
张亚诏
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Southwest Petroleum University
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Southwest Petroleum University
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Priority to CN201910244669.8A priority Critical patent/CN109841138A/en
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Abstract

The invention discloses a kind of test model that the ground foundation simulation with Distribution of Magnetic Field settles and methods, including a model casing, one piece of partition, one energization magnetic coil group, an electrifying control system, an iron filings layer, one ground layer, be characterized in that: model casing cavity bottom is provided with partition, and one layer of iron filings are laid with above partition, several magnetic coils of controllable switch and watt level are provided with below partition.Test model and method of the invention, the switch and watt level of several magnetic coils can drive the iron filings of corresponding top to form different distributions, and the ground layer above iron filings layer can be equal to the distribution of iron filings layer, realize the simulation of settlement of foundation.The simulation to ground settlement law may be implemented in the present invention, has structure simple, and simulation effect is good, at low cost, repeats experimental strong advantage.

Description

A kind of test model and method of the ground foundation simulation sedimentation with Distribution of Magnetic Field
Technical field
The present invention relates to the test models and method of a kind of sedimentation of ground foundation simulation, more specifically, more particularly to a kind of benefit Iron filings are made to generate uneven distribution to the test model and method of ground foundation simulation sedimentation with magnetic field.
Background technique
It is influenced by multiple factors such as external load effect, temperature, water, the disease of settlement of foundation easily occurs in ground construction of structures Evil, mechanism and the prevention and treatment of settlement of foundation can be ground by the methods of theoretical calculation, numerical simulation, model test, on-the-spot test Study carefully.Wherein, model test be in proportion reduced scale restore engineering structure, it can be achieved that simulated object deformation monitor, many condition control System repeats, and is the effective means of research engineering structure stress deformation, passes through the stress to foundation model and upper part work structure Deformation test can be used for the performance indexes of the true engineering structure of estimate analysis.Model casing, which is that scale (model) test is common, to be set Standby, current model casing, which is all made of, is utilized respectively the sedimentation of multiple spot difference to simulate bulk settling, but can not simulate complete Stress curved surface cannot achieve the simulation to differential settlement.Theoretical calculation and numerical analysis can reflect ground to a certain extent Stress deformation changing rule, larger with actual error, accuracy is to be improved, although actual test most can intuitively reflect it is heavy Drop problem, but higher cost and being difficult to carries out the lower repetition test of more influence factors controls, and model test is lower with one compared to relatively Fixed advantage, therefore the test model that ground foundation simulation sedimentation can be achieved is developed with certain engineering value.
Summary of the invention
To overcome the above disadvantages, a kind of test model that the ground foundation simulation with Distribution of Magnetic Field settles and side are proposed Method.
The test model that ground foundation simulation with Distribution of Magnetic Field of the invention settles, the model including a upper end opening A partition that will separate up and down is arranged in case, the inside of model casing, and partition top is the cavity that ground layer is arranged, ground layer top Model is built in construction for placing pending test.Its special feature is that: the model casing bottom is fixed with support frame group, often An energization magnetic coil composition energization magnetic coil group is fixed on a support frame: electromagnetic coil group can control each magnetic with one The control system of coil switch and power is connected.It is provided with one layer of partition above the energization magnetic coil, is placed above partition One layer of iron filings.It is ground layer above the iron filings layer.
The test method for the test model that ground foundation simulation with Distribution of Magnetic Field of the invention settles, special feature exist In being realized by following steps: a) constructs model casing, and according to test requirements document and purpose, constructing corresponding size can be accommodated accordingly The model casing of test model;B) arranges energization magnetic coil, according to practical sedimentation situation to be simulated, first in model casing bottom The energization magnetic coil of suitable quantity and distribution is set;C) places the partition that can bear upper pressure above energization magnetic coil; D) places one layer of certain thickness iron filings above partition, and the magnetic field that energization magnetic coil generates can allow iron filings throughout to generate not Same thickness, thus the sedimentation of ground foundation simulation.E) fills out ground layer above iron filings layer, this layer of embedded ground with Practical Project The soil property that base phase adapts to.F) corresponding engineering model is placed in above ground layer by, buried under model a certain number of stress and Displacement sensor.G) forms different magnetic by the switch and energized power of the energization magnetic coil of the different location of control bottom , it controls the iron filings layer above partition and forms non-uniform thickness distribution, to simulate different sedimentation situations.H) data obtain It takes, the data for analysis is obtained by stress and displacement sensor.
The beneficial effects of the present invention are: experimental model and method that ground foundation simulation of the invention settles, model casing bottom are put It is placed in energization magnetic coil group, by controlling the logical solenoid switch and energized power of different location, can produce different magnetic Field distribution, and then by the attraction to top iron filings, the iron filings layer of uneven distribution is formed, and then generate the ground layer of top Corresponding sedimentation distribution, therefore the simulation of different ground settlement laws can be carried out.Relative to the ground simulation model having had For, the characteristics of there is the settlement of foundation more continuously smooth of simulation, mutation will not be generated, simulate complete sedimentation curved surface.
Detailed description of the invention
Fig. 1 is the structural schematic diagram for the test model that the ground foundation simulation of the invention with Distribution of Magnetic Field settles;
Fig. 2 is the test model application principle figure that ground foundation simulation of the invention settles;
In figure: 1- model casing, 2- partition, 3- energization magnetic coil, 4- control system, 5- iron filings layer, 6- ground layer.
Specific embodiment
The invention will be further described with embodiment with reference to the accompanying drawing.
As shown in Figure 1, the structure for giving the test model that the ground foundation simulation of the invention with Distribution of Magnetic Field settles is shown It is intended to, is made of model casing 1, partition 2, energization magnetic coil 3, control system 4, the top of shown model casing is cavity, cavity Lower section is the horizontal positioned partition 2 being connected with model casing, and partition lower section is provided with energization magnetic coil group 3, energization magnetic coil group and The control system 4 of outside is connected.
As shown in Fig. 2, give the test model application principle figure of ground foundation simulation sedimentation of the invention, this method include with Lower step: a) constructs model casing, and according to test requirements document and purpose, the model of corresponding test model can be accommodated by constructing corresponding size Case;B) arranges energization magnetic coil, according to it is to be simulated it is practical settle situation, first in model casing bottom setting suitable quantity and The energization magnetic coil of distribution;C) places the partition that can bear upper pressure above energization magnetic coil;D) is put above partition One layer of certain thickness iron filings are set, the magnetic field that energization magnetic coil generates can allow iron filings throughout to generate different thickness, thus mould The sedimentation of quasi- ground.E) fills out ground layer above iron filings layer, this layer of embedded soil property adaptable with the ground of Practical Project. F) corresponding engineering model is placed in above ground layer by, and a certain number of stress and displacement sensor are buried under model.g). By controlling the switch and energized power of the energization magnetic coil of the different location of bottom, different magnetic field is formed, is controlled on partition The iron filings layer of side forms non-uniform thickness distribution, to simulate different sedimentation situations.H) data acquisition, by stress and Displacement sensor obtains the data for analysis.The above is only a preferred embodiment of the present invention, it should be pointed out that: for this For the those of ordinary skill of technical field, without departing from the principle of the present invention, several improvement and profit can also be made Decorations, these modifications and embellishments should also be considered as the scope of protection of the present invention.

Claims (2)

1. a kind of test model that the ground foundation simulation with Distribution of Magnetic Field settles and method, it is characterised in that: including a model Case, one piece of partition, an energization magnetic coil group, an electrifying control system, an iron filings layer, a ground layer, energization magnet-wire Circle group is located at below model casing, by the switch and watt level of each energization magnetic coil, to generate different Distribution of Magnetic Field, into And the iron filings layer above partition is allowed to generate corresponding distribution, the distribution of the ground layer of top will be convergent with iron filings layer, to simulate Different settlement of foundation.
2. test model and method that a kind of ground foundation simulation with Distribution of Magnetic Field according to claim 1 settles, special Sign is: generating different Distribution of Magnetic Field with the switch and watt level of several magnetic coils, and then controls the iron filings of top The distribution of layer, the simulation of Lai Jinhang settlement of foundation.
CN201910244669.8A 2019-03-28 2019-03-28 A kind of test model and method of the ground foundation simulation sedimentation with Distribution of Magnetic Field Pending CN109841138A (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111576328A (en) * 2020-04-17 2020-08-25 华北水利水电大学 Utilize magnetic field force to change laboratory bench of gelatinization sand gravel dam model test piece unit weight
CN113883996A (en) * 2021-09-14 2022-01-04 中铁西北科学研究院有限公司 Simulation device and analysis method for influence of foundation additional stress on superstructure

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104898467A (en) * 2015-03-27 2015-09-09 西北工业大学 Uniform electromagnetic force field generation device and method
CN205120708U (en) * 2015-07-24 2016-03-30 华北水利水电大学 Test device of mechanism is subsided in simulation collecting space area
CN105527389A (en) * 2016-03-02 2016-04-27 山东交通学院 Jack-based experiment model and method for simulating uneven settlement of foundation
CN109243287A (en) * 2018-11-06 2019-01-18 重庆三峡职业学院 A kind of interactive sand table system

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104898467A (en) * 2015-03-27 2015-09-09 西北工业大学 Uniform electromagnetic force field generation device and method
CN205120708U (en) * 2015-07-24 2016-03-30 华北水利水电大学 Test device of mechanism is subsided in simulation collecting space area
CN105527389A (en) * 2016-03-02 2016-04-27 山东交通学院 Jack-based experiment model and method for simulating uneven settlement of foundation
CN109243287A (en) * 2018-11-06 2019-01-18 重庆三峡职业学院 A kind of interactive sand table system

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111576328A (en) * 2020-04-17 2020-08-25 华北水利水电大学 Utilize magnetic field force to change laboratory bench of gelatinization sand gravel dam model test piece unit weight
CN113883996A (en) * 2021-09-14 2022-01-04 中铁西北科学研究院有限公司 Simulation device and analysis method for influence of foundation additional stress on superstructure
CN113883996B (en) * 2021-09-14 2024-02-02 中铁西北科学研究院有限公司 Simulation device and analysis method for influence of foundation additional stress on upper structure

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