CN105510560B - A kind of settling test model and its test method based on motor driving sand leakage method - Google Patents

A kind of settling test model and its test method based on motor driving sand leakage method Download PDF

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Publication number
CN105510560B
CN105510560B CN201610116265.7A CN201610116265A CN105510560B CN 105510560 B CN105510560 B CN 105510560B CN 201610116265 A CN201610116265 A CN 201610116265A CN 105510560 B CN105510560 B CN 105510560B
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China
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test
leakage
sand
casing
sandpipe
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CN201610116265.7A
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Chinese (zh)
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CN105510560A (en
Inventor
李晋
左珅
张波
王云江
辛强
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山东交通学院
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    • GPHYSICS
    • G01MEASURING; TESTING
    • G01NINVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N33/00Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
    • G01N33/24Earth materials

Abstract

The settling test model that sand leakage method is driven based on motor of the present invention, including model casing, are characterised by:The bottom of model casing internal cavities, which is provided with to be provided with least one outer tube, outer tube, takes sandpipe, and outer leakage sand hole is offered on outer tube, the interior leakage sand hole for being provided with and being engaged with outer leakage sand hole on sandpipe is taken.The test method of the present invention, including:A) builds model casing;B) designs sand leakage structure;C) fill-up grounds basic unit;D) builds upper part work structure sheaf;E) settlement of foundation is simulated;F) Data acquisition and issuances;G) observes ground interior change situation.The settling test model and its test method of the present invention, it is simple and reasonable, sand leakage point and quantity can be set according to requirement of experiment, the simulation of the different type sedimentations such as bumping at bridge-head, differential settlement, land in gully, edge sedimentation can be achieved, beneficial effect significantly, is suitable for the application of popularization.

Description

A kind of settling test model and its test method based on motor driving sand leakage method
Technical field
The present invention relates to a kind of settling test model and its test method, in particular, more particularly to one kind is based on electricity The settling test model and its test method of machine driving sand leakage method.
Background technology
Structure is built on the unfavorable foundations such as karst, goaf, weak soil, collapsible loess(Railway, highway, dam, room Room etc.), acted on by external loads, the multiple factors such as air, temperature, underground water are influenceed, and the disease of settlement of foundation easily occur, right The research of settlement of foundation is main by theoretical calculation and numerical simulation at present, and model test method can realize simulated object deformation It can monitor, many condition is controlled, repeatable, be the conventional means of research engineering structure stress deformation, wherein, foundation model is scene Ground scaled down is true available for estimate analysis by testing foundation model and the stress deformation of upper part work structure The property indices of engineering structure, current existing foundation model can not simulate sinking for deep ground earth, and therefore, it is difficult to obtain Take superstructure stress deformation rule caused by foundation soil depression.
The content of the invention
There is provided a kind of sedimentation examination based on motor driving sand leakage method in order to overcome the shortcoming of above-mentioned technical problem by the present invention Test model and its test method.
The settling test model that sand leakage method is driven based on motor of the present invention, includes the model casing of upper end open, model casing Inside to set the cavity of ground layer, the top of ground layer is used to set engineering structure layer to be tested;Its special feature exists In:The bottom of the model casing internal cavities is provided with least one outer tube, and the both ends open of outer tube simultaneously runs through model Being provided with case, outer tube can carry out offering some outer leakage sand holes on the sandpipe that takes of free rotation, outer tube, take and set on sandpipe The interior leakage sand hole being engaged with outer leakage sand hole is equipped with, takes the sand in sandpipe to be discharged by pushing away sand bar;Ground layer and/or engineering knot The measurement sensor for obtaining detection data is provided with structure layer.
The settling test model that sand leakage method is driven based on motor of the present invention, a side of the model casing is for ease of sight The transparent glass door of situation in cavity is examined, the both sides of transparent glass door are provided with the fixed frame being fixed on model casing, it is fixed The guide groove for being easy to glass door to be inserted and removed from is provided with framework.
The settling test model that sand leakage method is driven based on motor of the present invention, including sand leakage automaton, sand leakage is certainly Dynamic control device is made up of motor, power transmission shaft and driving gear, and driving gear is fixed on power transmission shaft, and motor is used for Drive power transmission shaft to be rotated, take the driven gear for being provided with and being meshed with driving gear on sandpipe.
Being marked on the settling test model that sand leakage method is driven based on motor of the present invention, the transparent glass door is had Line.
The settling test model that sand leakage method is driven based on motor of the present invention, described measurement sensor includes strain sensing Device, strain gauge and displacement transducer.
The test method of the settling test model that sand leakage method is driven based on motor of the present invention, it is particular in that, leads to Following steps are crossed to realize:A) builds model casing, according to test requirements document and purpose, builds what length was of the required size Model casing;B) designs sand leakage structure, straight in the bottom arrangement of model casing internal cavities according to the Practical Project situation to be simulated Footpath, quantity, the satisfactory outer tube in position, and installed in the inside of outer tube be matched therewith take sandpipe;By setting Outer tube, the position for taking sandpipe in model casing are put, to control ground layer settlement point position;C) fill-up grounds basic unit, according to wanting mould The Practical Project geological conditions of plan, chooses the bottom that suitable soil property is layed in model casing, forms ground layer;And will according to experiment Ask and a number of pressure sensor, displacement transducer are buried in ground layer;D) builds upper part work structure sheaf, for mould Intend object, the engineering structure consistent with treating simulated object is built on ground layer, form engineering structure layer, and in corresponding position Put embedded strain, pressure, displacement transducer;E) settlement of foundation is simulated, and is driven by manual or motor and is taken sandpipe to rotate, Take in sandpipe, and will be taken by pushing away sand bar in sandpipe so that the soil body of ground layer bottom is entered by outer leakage sand hole, interior leakage sand hole The soil body smash out;The settling amount of ground layer is controlled by controlling to take out the quantity of the soil body;F) Data acquisition and issuances, on ground In base sedimentation simulation process, the data of all embedded sensors are measured and record, by the data variation of Monitoring Data sensor, The analytically changing rule of superstructure stress deformation caused by base multi-point settlement, simulation test can be to the engineering knot on ground layer The destruction completely of structure layer;G) observes ground interior change situation, and simulated test enters after limiting damage state, by transparent glass door Extract out, the model ground layer after the completion of settling test is excavated according to analysis of experiments requirement, directly to observe inside ground layer Situation of change.
The beneficial effects of the invention are as follows:Settling test model and its experiment side that sand leakage method is driven based on motor of the present invention Method, sets outer tube in the bottom of model casing cavity according to test requirements document and takes sandpipe, can be achieved to sand leakage point, sand leakage point quantity Control, internally laid from the bottom to top in cavity ground layer, engineering structure layer, and ground layer, engineering structure layer in bury Strain, pressure, displacement transducer;In process of the test, control push away sand bar from take sandpipe to smash out the quantity of the soil body can control settlement Amount, passes through the change of the data variation of Monitoring Data sensor, analytically superstructure stress deformation caused by base multi-point settlement Rule.
Further, by setting the sand leakage being made up of motor, power transmission shaft, driving gear, driven gear to control automatically Device processed, motor is by the control to taking sandpipe rotational angle, to realize the control to sand leakage speed.By by model casing A side be set to transparent glass door, be easy in process of the test directly observe ground layer interior change situation.The present invention's Settling test model and test method, it is simple and reasonable, sand leakage point and quantity can be set according to requirement of experiment, can be real The simulation of the different type sedimentations such as existing bumping at bridge-head, differential settlement, land in gully, edge sedimentation, beneficial effect significantly, is suitable to Application.
The present invention's drives the settling test model and its test method advantage of sand leakage method to be embodied in based on motor:
(1), can according to the difference of test requirements document, flexibly set and adjustment outer tube position, pass through and reserve inside and outside leakage The position of sand hole, can be achieved the simulation of deep ground earth multi-point settlement, realizes bumping at bridge-head, differential settlement, land in gully, edge The simulation of the different types such as sedimentation sedimentation.
(2), by setting outer tube and taking the diameter of sandpipe and the quantity of leakage sand hole, and by motor control take The rotational angle of sandpipe, can be achieved to settling amount, the accurate control of the rate of settling.
(3), due to can be disposed within by whole testing equipment so that the model test environment of such as humidity, temperature parameter Easily controllable, measurement sensor is easy to lay and monitored, with reference to Sensor monitoring data, and process of the test can conveniently monitor ground layer And the deformation stressing conditions of upper part work structure sheaf.
(4), the transparent glass door that can extract of use, be easy to according to analysis of experiments requirement in process of the test and settling test After the completion of model foundation dredging, can and directly observe ground interior change situation.
(5), testing equipment construction is concise, operability is high, the model casing manufacturing cost is not high, and is widely used, the examination Test model and method is easily achieved and promoted.
Brief description of the drawings
Fig. 1 is the structural representation of the settling test model of the present invention;
Fig. 2 for the present invention in take the structural representation that sandpipe is engaged with outer tube;
Fig. 3 is the schematic diagram tested using settling test model in the present invention.
In figure:1 model casing, 2 cavitys, 3 outer tubes, 4 take sandpipe, 5 outer leakage sand holes, leakage sand hole in 6, and 7 push away sand bar, 8 transmissions Axle, 9 driving gears, 10 driven gears, 11 motors, 12 transparent glass doors, 13 fixed frames, 14 graduation marks, 15 ground layers, 16 engineering structures layer, 17 measurement sensors.
Embodiment
The invention will be further described with embodiment below in conjunction with the accompanying drawings.
As shown in figure 1, give the present invention settling test model structural representation, its by model casing 1, outer tube 3, Take sandpipe 4, push away sand bar 7, power transmission shaft 8, driving gear 9, driven gear 10, motor 11, transparent glass door 12, fixed frame 13 compositions, shown model casing 1 is the three-dimensional shape of upper end open, and the inside of model casing 1 is cavity.Outer tube 3 is arranged at mould The bottom of the internal cavities 2 of molding box 1, the both ends open of outer tube 3 simultaneously passes body wall with the both sides of model casing 1, takes sandpipe 4 to be located at outer It is coaxially disposed in sleeve pipe 3 and with outer tube 3, to ensure to take sandpipe 4 freely to rotate in outer tube 3.
Outer leakage sand hole 5 is offered on shown outer tube 3, takes and is opened up on position corresponding with outer leakage sand hole 5 on sandpipe 4 There is interior leakage sand hole 6;, can be to the sand leakage point quantity of ground layer to be tested by changing the quantity of outer leakage sand hole 5 and interior leakage sand hole 6 It is controlled, by changing the position of outer leakage sand hole 5 and interior leakage sand hole 6, the adjustment of sand leakage point position can be achieved.As shown in Fig. 2 The structural representation for taking sandpipe to be engaged with outer tube in the present invention is given, when outer leakage sand hole 5 with interior leakage sand hole 6 in the absence of weight During conjunction, sand leakage amount is minimum(It is zero), when outer leakage sand hole 5 is completely superposed with interior leakage sand hole 6, sand leakage amount is maximum, outer by adjustment Leakage sand hole 5 and the size of the overlapping region of interior leakage sand hole 6, can be controlled to sand leakage amount, with control settlement speed.Meanwhile, lead to Cross the outer tube 3 for using different-diameter size and take sandpipe 4, the rate of settling can be also controlled.
One side of shown model casing 1 is transparent glass door 12, and the both sides of transparent glass door 12 are provided with fixed frame Frame 13, fixed frame 13 is fixed on model casing, the guide groove fixed to transparent glass door 12 is provided with fixed frame 13, thoroughly Bright glass door 12 is installed and fixed by the guide groove on fixed frame 13, and graduation mark is additionally provided with transparent glass door 12 14.In the process of the test of settlement of foundation, the situation of change of ground layer can be observed by transparent glass door 12.
The sand leakage that motor 11, power transmission shaft 8, driving gear 9 and driven gear 10 constitute the present invention automatically controls dress Put, the output shaft of motor 11 is used to drive power transmission shaft 8 to be rotated.Driving gear 9 is fixed on power transmission shaft 8, passive tooth Wheel 10 is fixed on the one end for taking sandpipe 4, and driving gear 9 is meshed with driven gear 10, and such motor 11, which can drive, takes sand Pipe 4 is rotated.In process of the test, motor 11 by taking the rotational angle of sandpipe 4, can adjust in leakage sand hole 6 and leakage The overlapping region size of sand hole 5, and then realize the control to the rate of settling.
Wherein, model casing 1 can use Patent No. ZL201220527366.0, invention and created name for " ground foundation simulation is used Model casing disclosed in the patent document of Demountable combined-type model casing ", the one side use of model casing can be had an X-rayed organic Glass, is easy to mark scale on foundation settlement deformation in inspection box, clear glass, to precisely observation settling amount.Model casing 1 The size of length should be controlled within 2m*2m*1m, and the engineering structures such as subgrade and pavement layer, top work are laid on ground layer Journey structure sheaf size and material are designed according to simulated object, can basis in ground layer and upper part work structure sheaf Test objective is installed with requirement and measures strain, stress, the sensor of displacement, connects up flexible, survival rate height and convenient test.
As shown in figure 3, give the schematic diagram tested in the present invention using settling test model, it is of the invention based on The test method of the settling test model of motor driving sand leakage method, is realized by following steps:
A) builds model casing, according to test requirements document and purpose, builds the model casing that length is of the required size;
B) designs sand leakage structure, straight in the bottom arrangement of model casing internal cavities according to the Practical Project situation to be simulated Footpath, quantity, the satisfactory outer tube in position, and installed in the inside of outer tube be matched therewith take sandpipe;By setting Outer tube, the position for taking sandpipe in model casing are put, to control ground layer settlement point position;
C) fill-up grounds basic unit, according to the Practical Project geological conditions to be simulated, chooses suitable soil property and is layed in model casing Bottom, formed ground layer;And a number of pressure sensor, displacement sensing are buried in ground layer according to test requirements document Device;
D) builds upper part work structure sheaf, and for simulated object, the work consistent with treating simulated object is built on ground layer Journey structures, form engineering structure layer, and bury strain, pressure, displacement transducer in corresponding position;
E) settlement of foundation is simulated, and is driven by manual or motor and is taken sandpipe to rotate, so that the soil body of ground layer bottom Entered by outer leakage sand hole, interior leakage sand hole and taken in sandpipe, and by pushing away sand bar the soil body in sandpipe will be taken to smash out;Taken by control Go out the quantity of the soil body to control the settling amount of ground layer;
F) Data acquisition and issuances, in settlement of foundation simulation process, measure and record the number of all embedded sensors According to passing through the change of the data variation of Monitoring Data sensor, analytically superstructure stress deformation caused by base multi-point settlement Rule, simulation test can be to the engineering structure layer destruction completely on ground layer;
G) observes ground interior change situation, and simulated test enters after limiting damage state, transparent glass door is extracted out, The model ground layer after the completion of settling test is excavated according to analysis of experiments requirement, directly to observe ground layer interior change feelings Condition.

Claims (1)

1. a kind of test method of the settling test model based on motor driving sand leakage method, settling test model includes upper end open Model casing(1), the inside of model casing is setting ground layer(15)Cavity(2), the top of ground layer is used to set to be tested Engineering structure layer(16);The bottom of the model casing internal cavities is provided with least one outer tube(3), the two ends of outer tube Be open and run through be provided with model casing, outer tube can carry out free rotation take sandpipe(4), offer on outer tube some Outer leakage sand hole(5), take the interior leakage sand hole for being provided with and being engaged with outer leakage sand hole on sandpipe(6), the sand in sandpipe is taken by pushing away Sand bar(7)Discharge;The measurement sensor for obtaining detection data is provided with ground layer and/or engineering structure layer(17);
The model casing(1)A side for ease of observation cavity(2)The transparent glass door of middle situation(12), transparent glass door Both sides be provided with the fixed frame being fixed on model casing(13), it is provided with fixed frame and is easy to glass door to be inserted and removed from Guide groove;
Including sand leakage automaton, sand leakage automaton is by motor(11), power transmission shaft(8)And driving gear (9)Composition, driving gear is fixed on power transmission shaft, and motor is used to drive power transmission shaft to be rotated, and takes sandpipe(4)It is upper to set There is the driven gear being meshed with driving gear(10);
Characterized in that, driving the test method of the settling test model of sand leakage method based on motor, realized by following steps:
A) builds model casing, according to test requirements document and purpose, builds the model casing that length is of the required size;
B) designs sand leakage structure, according to the Practical Project situation to be simulated, bottom placement diameter in model casing internal cavities, Quantity, the satisfactory outer tube in position, and installed in the inside of outer tube be matched therewith take sandpipe;It is outer by setting Sleeve pipe, position of the sandpipe in model casing is taken, to control ground layer settlement point position;
C) fill-up grounds basic unit, according to the Practical Project geological conditions to be simulated, chooses the bottom that suitable soil property is layed in model casing Portion, forms ground layer;And a number of pressure sensor, displacement transducer are buried in ground layer according to test requirements document;
D) builds upper part work structure sheaf, and for simulated object, the engineering structure consistent with treating simulated object is built on ground layer Thing is built, engineering structure layer is formed, and strain, pressure, displacement transducer are buried in corresponding position;
E) settlement of foundation is simulated, and is driven by manual or motor and is taken sandpipe to rotate, so that the soil body of ground layer bottom passes through Outer leakage sand hole, interior leakage sand hole, which enter, to be taken in sandpipe, and by pushing away sand bar the soil body in sandpipe will be taken to smash out;By controlling to take out soil The quantity of body controls the settling amount of ground layer;
F) Data acquisition and issuances, in settlement of foundation simulation process, measure and record the data of all embedded sensors, lead to The data variation of Monitoring Data sensor is crossed, analytically the changing rule of superstructure stress deformation caused by base multi-point settlement, Simulation test can be to the engineering structure layer destruction completely on ground layer;
G) observes ground interior change situation, and simulated test enters after limiting damage state, transparent glass door is extracted out, according to Analysis of experiments requirement is excavated to the model ground layer after the completion of settling test, directly to observe ground layer interior change situation.
CN201610116265.7A 2016-03-02 2016-03-02 A kind of settling test model and its test method based on motor driving sand leakage method CN105510560B (en)

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CN2242456Y (en) * 1995-09-05 1996-12-11 邓福珍 Double layer rotary seal type sampling device
CN102426396B (en) * 2011-09-05 2013-10-16 同济大学 Testing apparatus for simulating deep-displacement-initiated strata deformation coordination mechanism
CN202351077U (en) * 2011-11-10 2012-07-25 南京银茂铅锌矿业有限公司 Cement sampler
CN105021418B (en) * 2015-07-22 2017-12-08 河海大学 Suitable for the shield tunneling surface model and analogy method of geotechnical centrifugal model test
CN105242028B (en) * 2015-11-11 2017-04-05 中国矿业大学 One kind is taken out filling by skyscraper load and subsoil water and causes soil body delaminating deposition model test apparatus and test method
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