CN106840884A - Soil mass elastic parameter test device and its method of testing - Google Patents
Soil mass elastic parameter test device and its method of testing Download PDFInfo
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- CN106840884A CN106840884A CN201710191532.1A CN201710191532A CN106840884A CN 106840884 A CN106840884 A CN 106840884A CN 201710191532 A CN201710191532 A CN 201710191532A CN 106840884 A CN106840884 A CN 106840884A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/08—Investigating strength properties of solid materials by application of mechanical stress by applying steady tensile or compressive forces
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/0001—Type of application of the stress
- G01N2203/0003—Steady
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/0014—Type of force applied
- G01N2203/0016—Tensile or compressive
- G01N2203/0019—Compressive
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/0058—Kind of property studied
- G01N2203/0069—Fatigue, creep, strain-stress relations or elastic constants
- G01N2203/0075—Strain-stress relations or elastic constants
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/02—Details not specific for a particular testing method
- G01N2203/025—Geometry of the test
- G01N2203/0256—Triaxial, i.e. the forces being applied along three normal axes of the specimen
Abstract
The present invention provides a kind of soil mass elastic parameter test device, the Up-Center-Down Structure that the pedestal of the device is constituted in six terrace with edges, six prisms, six terrace with edges, and the top surface of pedestal, bottom surface and all sides are provided with groove, 1 soil pressure cell is arranged at the top surface of the terrace with edge of pedestal top six；3 soil pressure cells are arranged in the groove not adjacent to each other of the terrace with edge side of pedestal top six, and 3 soil pressure cells are arranged in the groove not adjacent to each other of the prism side of pedestal six, and 3 soil pressure cells are arranged in the groove not adjacent to each other of the terrace with edge side of pedestal bottom six；10 strain boxes are arranged in the vacant pressure cell groove in pedestal side and bottom surface；10 soil pressure cells and 10 data conductors of strain box collect after hole is drawn from data wire through base interior data wire duct and are connected with data collecting system.There is provided a kind of method of testing of soil mass elastic parameter test device simultaneously.Beneficial effect is that the raising of precision in device detection operation can to the full extent be presented real soil mass elastic parameter, for the intensity and Study on Deformation of the soil body provide guarantee.
Description
Technical field
The invention belongs to Geotechnical Engineering field, it is related to a kind of soil mass elastic parameter test device and its method of testing, can uses
Elastic parameter in the test soil body.
Background technology
When the soil body can not produce displacement under external force, its geometry and size will change, this deformation
Referred to as strain.Reaction force resistance external force equal in magnitude but in opposite direction is generated inside when the soil body is deformed upon, definition is single
This reaction force in plane product is stress.The elastic parameter of the soil body is to study the bridge of resistance to shear of soil strain stress relation, is to build
The key of vertical soil strength model.
Rock And Soil has the material properties different from metal, because real stress-strain state is difficult to obtain, therefore according to
Assume to obtain its ess-strain value according to isotropism.Because of the feature, the reality of any such as the pressure hardness of the soil body, broken and scattered property, non-linear
Strain can not directly test acquisition.Embedded dress is acted on by the really soil pressure obtained in the embedded strain device of inside soil body
The device strain put and produce, and embedded device is that face contacts not wire body, the pressure for being essentially certain direction soil body of acquisition
The mean strain produced to embedded device.
Conventional soil mass elastic parameter determines that Main Basiss are one-dimensional or two-dimentional computational theory, or based on direct shear test, solid
The laboratory tests such as knot experiment, the parameter of measure is the parameter in meaning of equal value, not actual elastic parameter.For a long time,
Some ground worker proposes a series of strength model, and the class model has two-parameter variable elasticity model and cannot consider to cut swollen
Four parameter model；Seven parameter models are based on the universal relation that coaxial characteristic establishes orthogonal ergodicity, what nine parameters were represented
It is the elastic constant of orthotropic material.Because seven parameter models and nine parameter models are difficult to test in practical situations both,
Thus the strength model based on seven parameters and nine parameters is there is no so far.The He of the patent No. 2014103451953
2015109568005 disclose the computational methods for the test of three-dimensional Soil mass state with different view, are the test soil body
Conventional stress state is provided may.The patent No. 2014107401402 is disclosed for testing inside soil body three dimensional strain state
Test device, but soil body strain testing needs enough material similarity, and substance does not point out material type to the patent,
Still need to improve.Due to by the technical limitation such as method of testing, there is no nine bullets that can test orthotropic material
The device of property parameter.
It is the elastic performance of Validity Test various soil mass, rationally assesses ess-strain, intensity and the deformation characteristic of the soil body.Have
Necessity proposes the method for testing of soil mass elastic parameter.Such method of testing is provided just to recognize the mechanics and deformation characteristic of the soil body
Profit, will provide possibility for the foundation of the parameter intensity model of the soil body nine.
The content of the invention
It is an object of the invention to provide a kind of soil mass elastic parameter test device and its method of testing, to realize the true of the soil body
Live shell parameter testing, and then for rationally the ess-strain of the assessment soil body, intensity and deformation characteristic provide possibility.In this process
In, propose strain box and its method of testing.
To solve the above problems, the invention provides a kind of soil mass elastic parameter test device, the soil mass elastic parameter is surveyed
Trial assembly is put and is embedded in inside soil body, and is connected with data collecting system, wherein：The device includes 10 soil pressure cells, 10
Individual strain box, pedestal, data conductor, waterproof gasket cement composition；The pedestal in six terrace with edges, six prisms, six terrace with edges composition it is upper
In lower structure, and the top surface of pedestal, bottom surface and all sides are provided with groove, and 1 soil pressure cell is arranged at pedestal top six
The top surface of terrace with edge；3 soil pressure cells are arranged in the groove not adjacent to each other of the terrace with edge side of pedestal top six, 3 soil pressure cells
Be arranged in the groove not adjacent to each other of the prism side of pedestal six, 3 soil pressure cells be arranged at the terrace with edge side of pedestal bottom six that
In this non-conterminous groove；10 strain boxes are arranged in the vacant pressure cell groove in pedestal side and bottom surface；10 soil pressures
Box and 10 strain box data conductors through base interior data wire duct from data wire collect hole draw after with data acquisition system
System is connected, and by waterproof gasket cement by the gap filling between soil pressure cell and pedestal, forms soil mass elastic parameter test dress
Put.
There is provided a kind of method of testing of soil mass elastic parameter test device simultaneously.
Effect of the present invention is to have filled up the blank that the elastic parameter of the soil body nine can not be tested directly.Such method of testing is understanding
The mechanics and deformation characteristic of the soil body are provided convenience, and will provide possibility for the foundation of the parameter intensity model of the soil body nine.If single soil
The precision of pressure cell and single strain box is respectively κ, ρ, then maximum (normal) stress precision is 4.33 κ, and maximum shear stress precision is
3.5κ；Maximum normal strain precision is 10.33 ρ, and maximum shear strain precision is 34.67 ρ.The raising of precision can be at utmost in operation
It is upper that real soil mass elastic parameter is presented, for the intensity and Study on Deformation of the soil body provide guarantee.
Brief description of the drawings
Fig. 1 is that soil mass elastic parameter of the invention tests test device design sketch；
Fig. 2 is stress box design sketch of the present invention；
Fig. 3 is rigid pipe perspective view of the present invention；
Fig. 4 is pedestal effect of the present invention；
A kind of coordinate system that Fig. 5 soil body elastic-plastic mechanical parameter test devices of the invention are set up；
Fig. 6 is pedestal perspective view of the present invention；
Fig. 7 is pedestal profile of the present invention.
In figure：
1. pressure cell 2. strains the waterproof gasket cement of 3. pedestal of box, 4. data conductor 5.
The stopple of 21. rigid pipe, 22. elastomeric bladder, 23. inductor, 24. filling liquid 25.
The groove of 26. sealing ring, 27. seal groove, 28. inductor hole, 29. topping up hole 31.
The data wire of 32. data wire duct 33. collects hole
Specific embodiment
Soil mass elastic parameter test device of the invention and its method of testing are illustrated with reference to accompanying drawing.
Soil mass elastic parameter test device of the invention and its method of testing are to be based on：Soil body strain is set up with medium strain
Relation, so as to obtain its strain；Inverse operation according to the flexibility matrix between three-dimensional stress constraint and three dimensional strain state can be obtained
Take the elastic parameter of orthotropic material.
Soil mass elastic parameter test device structure of the invention is that the soil mass elastic parameter test device is embedded in the soil body
Portion, and be connected with data collecting system, it is characterized in that：The device includes 10 soil pressure cells, 1,10 strain boxes 2, pedestal
3rd, data conductor 4, waterproof gasket cement 5 are constituted；The Up-Center-Down Structure that the pedestal 3 is constituted in six terrace with edges, six prisms, six terrace with edges,
And the top surface of pedestal 3, bottom surface and all sides are provided with 31,1 soil pressure cell 1 of groove and are arranged at the terrace with edge of 3 top of pedestal six
Top surface groove 31 in；3 soil pressure cells 1 are arranged in the groove 31 not adjacent to each other of the terrace with edge side of 3 top of pedestal six, and 3
Individual soil pressure cell 1 is arranged in the groove 31 not adjacent to each other of the prism side of pedestal 3 six, and 3 soil pressure cells 1 are arranged at pedestal 3
In the groove 31 not adjacent to each other of the terrace with edge side of bottom six；10 strain boxes 2 are arranged at the vacant groove in the side of pedestal 3 and bottom surface
In 31；The data conductor 4 of 10 soil pressure cells 1 and 10 strain boxes 2 collects through the internal data line duct 32 of pedestal 3 from data wire
Hole 32 is connected after drawing with data collecting system；The gap between soil pressure cell 1 and pedestal 3 is filled out by waterproof gasket cement 5
Fill；Soil mass elastic parameter test device is formed, as shown in Figure 1.
It is of the invention strain the structure of box 2 be：The device include rigid pipe 21, elastomeric bladder 22, inductor 23, filling liquid 24,
Stopple 25, sealing ring 26, data wire 4, waterproof gasket cement 5.The rigid pipe 21 is one section of barrel of closing, rigid tube opening
End outer wall is provided with seal groove 27, and the bottom of rigid pipe 21 is provided with inductor hole 28, and the side wall of rigid pipe 21 is provided with topping up hole 29,
As shown in Figure 2.The test lead of inductor 23 is inserted into rigid pipe 21 through the inductor hole 28 of rigid pipe；With sealing ring 26 by elastomeric bladder
22 are arranged on rigid pipe seal groove 27；Filling liquid 24 is filled with inside rigid pipe 21 from topping up hole 29, and will be filled with stopple 25
Fluid apertures 29 is sealed；It is with waterproof gasket cement 5 that the gap filling on rigid pipe is closely knit；The data wire 4 that inductor 23 is connected and number
It is connected according to acquisition system, that is, forms soil body strain detection testing device.As shown in Figure 3.
Soil mass elastic parameter test device of the invention and its method of testing include following two kinds of steps：
A kind of step is：
1) the strain box 2 that will be assembled imbeds inside soil body, and data wire 4 is connected with data collecting system；
2) turn-on data acquisition system, stationary value P is recorded after pending data stabilization0；
3) soil body is loaded, obtains pressure value P1；
4) soil body strain value in embedded direction can be calculated using formula (1), formula (1) is
ε=(p1-p0) in K (1) formula (1), ε is soil body dependent variable；P0For step 1) in record stationary value；P1For
Step 2) the middle pressure value for obtaining.
Another step is：
1) the soil mass elastic parameter test device is embedded in the soil body to be measured；10 are obtained by data collecting system
The reading of soil pressure cell 1, i.e., σt；Simultaneously
10 readings of strain box 2 are obtained, i.e.,
σb；
2) three-dimensional stress constraint for obtaining the soil body is calculated according to formula (2), formula (3) and formula (4), according to formula formula (5), formula (6)
With the three-dimensional stress constraint that formula (7) obtains the soil body, computing formula is as follows：
In formula (2-4),σtIt is the soil body
10 readings of soil pressure cell 1 that elastic parameter test device is obtained； Represent
3 direct stress components and 3 shear stress components of tested point routine stress state.
In formula (5-7),σbIt is the soil body
10 strain values that elastic parameter test device is obtained；Represent tested point routine
3 normal strain components and 3 shearing strain components of strain regime；
3) elastic parameter of any is calculated according to formula (8-13)
Wherein, in formula (8-13), DijRepresent the elastic parameter of the soil body； Represent and survey
3 normal strain components and 3 shearing strain components of pilot routine strain regime；
Represent 3 direct stress components and 3 shear stress components of test point routine stress state.
4) elastic parameter of inside soil body can show according to formula (14)
Elastic parameter computational methods are obtained according to inside soil body, the real elastic parameter of inside soil body can be obtained, so as to be soil
Intensity and deformation in body engineering are calculated and provide facility.
What the method for testing of soil mass elastic parameter test device of the invention was realized in：
First, the making of pedestal 3.Pedestal 3 is made up of 2 six terrace with edges and six prisms, as shown in Figure 6.In Fig. 6
MNPQRS-M0N0P0Q0R0S0It is six terrace with edges, the six terrace with edges side and bottom surface angle are 45 °, a diameter of a of top surface inscribed circle, bottom
Face inscribed circle it is a diameter of M0N0P0Q0R0S0-M1N1P1Q1R1S1It is six prisms, six prism heights are a, inscribe
Circular diameter isThe whole height of pedestal 3 isM1N1P1Q1R1S1-M2N2P2Q2R2S2It is six terrace with edges, should
Six terrace with edge sides and bottom surface angle are 45 °, and top surface inscribed circle diameter is a, and bottom surface inscribed circle diameter isSuch as Fig. 7 institutes
Show.Each face to pedestal 3 is numbered, MNN0M0Place face is A1Face, M0N0N1M1Place face is A2Face, M1N1N2M2Place face is
A3Face, according to counter clockwise direction and first up and then down principle, numbering is B according to this in other faces1、B2、B3、C1、C2、C3、D1、D2、D3、
E1、E2、E3、F1、F2、F3, it is t, b that base top surface and base bottom surface are numbered respectively, as shown in Figure 5.In all surface of pedestal 3
Cylinder shape groove 31 is opened, groove diameter and groove depth are with soil pressure cell size；In the B of pedestal 33Face is opened data wire and collects hole 8, in groove
31 bottom center open data wire duct 7 leads to according to the total hole 9 of the congruence；As shown in Figure 4.
Second, three-dimensional soil mass elastic parameter test device assembling.10 soil pressure cells 1 are respectively arranged in the A of pedestal 31、
A2、A3、C1、C2、C3、E1、E2、E3, in groove 31 where t faces, box 2 will be strained be respectively arranged in the B of pedestal 31、B2、B3、D1、
D2、D3、F1、F2、F3, in groove 31 where b faces, and data conductor 4 is collected and through total according to the congruence by data wire duct 32
Hole 33 is connected after passing with data collecting system；The gap between soil pressure cell 1 and pedestal 3 is filled out by waterproof gasket cement 5
Fill, that is, form soil mass elastic parameter test device, as shown in Figure 1 and Figure 5.
3rd, device is buried.Soil mass elastic parameter test device is embedded in the soil body according to certain coordinate system, such as Fig. 5
It is shown.10 readings of soil pressure cell are obtained by data collecting system, 10 soil pressure cells 1 are obtained by data collecting system
Reading, i.e., σt；10 strains are obtained simultaneously
The reading of box 2, i.e., σb。
4th, the three-dimensional stress constraint of foundation formula (15), formula (16) and formula (17) the calculating acquisition soil body, foundation formula (18),
(19) and formula (20) obtains the three dimensional strain state of the soil body, computing formula is as follows：
In formula (15-17),σtIt is the soil body
10 readings of soil pressure cell 1 that elastic parameter test device is obtained； Represent
3 direct stress components and 3 shear stress components of tested point routine stress state.
In formula (18-20),σbIt is the soil body
10 strain values that elastic parameter test device is obtained；Represent tested point routine
3 normal strain components and 3 shearing strain components of strain regime；
3) elastic parameter of any is calculated according to formula (8)-(13)
Wherein, in formula (21-26), DijRepresent the elastic parameter of the soil body； Represent
3 normal strain components and 3 shearing strain components of test point routine strain regime；
Represent 3 direct stress components and 3 shear stress components of test point routine stress state.
4) elastic parameter of inside soil body can show according to formula (27)
Elastic parameter computational methods are obtained according to inside soil body, the real elastic parameter of inside soil body can be obtained, so as to be soil
Intensity and deformation in body engineering are calculated and provide facility.
The calculating derivation of soil body three dimensional elasticity parameter test device is as follows：
The three-dimensional stress constraint that stress state σ can be given according to formula (28) in different directions direct stress computational methods come
It is determined that；The computational methods of line strain are true in different directions for the three dimensional strain state that strain regime ε can be given according to formula (29)
It is fixed
σ=σxl2+σym2+σzn2+2σxylm+2σyzmn+2σzxnl (28)
σ in formula (28) and (29)x、σy、σz、σxy、σyz、σzx3 direct stress and 3 that conventional stress state is included are represented respectively
Individual shear stress；εx、εy、εz、εxy、εyz、εzxThe conventional strain regime of expression is included respectively 3 normal strains and 3 shearing strains；l、m、
N represents the direction cosines of measurement direction and x, y, z axle in rectangular coordinate system in space respectively.If known six independent, directions just should
, then formula (30) can be expressed as by power
In formula (30), σ1、σ2、σ3、σ4、σ5、σ6It is 6 direct stress in direction of a bit.Just should in known 6 independent, directions
On the premise of power, tangent stress can be drawn according to matrix inversion operation.The matrix of foundation formula (30) construction is simultaneously inverted, if
In the face A shown in Fig. 51、A2、C1、C2、E1、E2Soil pressure cell, tangent stress σ are arranged in facex、σy、σz、σxy、σyz、σzxCan
Calculated by formula (15)；If in face A2、A3、C2、C3、E2、E3Soil pressure cell is arranged in face, then the stress state at point O can be by formula (16)
Calculate；If in face t, A1、C1、E1、A2、C2Soil pressure cell is arranged in face, then the stress state at point O can be calculated by formula (17).
Similarly, if in face B1、B2、D1、D2、F1、F2Soil pressure cell, tangent stress ε are arranged in facex、εy、εz、εxy、
εyz、εzxCan be calculated by formula (18)；If in face B2、B3、D2、D3、F2、F3Soil pressure cell, tangent stress ε are arranged in facex、εy、
εz、εxy、εyz、ε zxCan be calculated by formula (19)；If in face b, B1、D1、F1、B2、F2Soil pressure cell, tangent stress are arranged in face
εx、εy、εz、εxy、εyz、εzxCan be calculated by formula (20).
3 three-dimensional stress constraints and 3 three-dimensional stress constraints that obtain are calculated based on formula (15-20) according to elastic theory,
The elastic parameter of the soil body can be calculated.
The foregoing is only and illustrated with reference to this manufacturing process, for the practical application of this area, the present invention
Can there are various change and change.All modifications within the spirit and principles in the present invention, made, equivalent, improvement etc.,
Should be included within protection scope of the present invention.
Claims (3)
1. a kind of soil mass elastic parameter test device, the soil mass elastic parameter test device is embedded in inside soil body, and and data
Acquisition system is connected, it is characterized in that：The device includes 10 soil pressure cells (1), 10 strains box (2), pedestal (3), numbers
According to wire (4), waterproof gasket cement (5)；The pedestal (3) presents six terrace with edges, six prisms, the upper, middle and lower knot of lower six terrace with edges composition
Structure, and the top surface of pedestal (3), bottom surface and all sides are provided with groove (31), 10 soil pressure cells (1) are set in turn in base
The top surface of seat (3) top six terrace with edge, six terrace with edge sides of pedestal (3) top three grooves (31) not adjacent to each other are interior, pedestal (3) six
Three grooves (31) that prism side three grooves (31) not adjacent to each other are interior, six terrace with edge sides of pedestal (3) bottom are not adjacent to each other
It is interior；10 strains box (2) are arranged in pedestal (3) side and bottom surface vacant groove (31)；10 soil pressure cells (1) and 10
Strain box (2) data conductor (4) through pedestal (3) internal data line duct (32) from data wire collect hole (33) draw after with number
It is connected according to acquisition system, by waterproof gasket cement (5) by the gap filling between soil pressure cell (1) and pedestal (3), forms soil
Body elasticity parameter test device.
2. soil mass elastic parameter test device according to claim 1, it is characterized in that：Strain box (2) is including rigidity
Pipe (21), elastomeric bladder (22), inductor (23), filling liquid (24), stopple (25), sealing ring (26), data wire (4), anti-watertight
Sealing (5), the rigid pipe (21) is the barrel of a closing, and rigid pipe openend outer wall is provided with seal groove (27), rigidity
Pipe (21) bottom is provided with inductor hole (28), and rigid pipe (21) side wall is provided with topping up hole (29)；By inductor (23) test
Rigid pipe (21) is inserted in end through the inductor hole (28) of rigid pipe；Elastomeric bladder (22) is arranged on rigid pipe with sealing ring (26) close
On sealing groove (27)；Filling liquid (24) from topping up hole (29) is filled with rigid pipe (21) internal, and with stopple (25) by topping up hole
(29) seal；It is with waterproof gasket cement (5) that the gap filling on rigid pipe is closely knit；The data wire (4) that inductor (23) is connected
It is connected with data collecting system, that is, forms the soil body and strain box (2).
3. the method for testing of soil mass elastic parameter test device according to claim 1, the method the first step includes
Have：
1) strain box (2) the embedment inside soil body that will be assembled, and data wire (4) is connected with data collecting system；
2) turn-on data acquisition system, stationary value P is recorded after pending data stabilization0；
3) soil body is loaded, obtains pressure value P1；
4) soil body strain value in embedded direction can be calculated using formula (1), formula (1) is
ε=(p1-p0)K (1)
In formula (1), ε is soil body dependent variable；P0For step 1) in record pressure value；P1For step 2) the middle pressure value for obtaining；
Another step is included：
1) the soil mass elastic parameter test device is embedded in the soil body to be measured；10 soil pressures are obtained by data collecting system
The reading of power box (1), i.e., σt；While 10
The reading of individual strain box (2), i.e., σb；
2) three-dimensional stress constraint for obtaining the soil body is calculated according to formula (2), formula (3) and formula (4), according to formula (5), formula (6) and formula (7)
The three dimensional strain state of the soil body is obtained, computing formula is as follows：
In formula (2-4),σtIt is soil body elasticity
10 readings of soil pressure cell (1) that parameter test device is obtained； Expression is treated
3 direct stress components and 3 shear stress components of measuring point routine stress state.
In formula (5-7),σbIt is soil body elasticity
10 strain values that parameter test device is obtained；Represent that tested point is routinely strained
3 normal strain components and 3 shearing strain components of state；
3) elastic parameter of any is calculated according to formula (8-13)
Wherein, in formula (8-13), DijRepresent the elastic parameter of the soil body； Represent test
3 normal strain components and 3 shearing strain components of the conventional strain regime of point；
Represent 3 direct stress components and 3 shear stress components of test point routine stress state.
4) elastic parameter of inside soil body can show according to formula (14)
Elastic parameter computational methods are obtained according to inside soil body, the real elastic parameter of inside soil body is obtained, so as to be soil body engineering
In intensity and deformation calculate provide facility.
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| CN107859019A (en) * | 2017-12-26 | 2018-03-30 | 天津城建大学 | The complete application apparatus of three-dimensional soil pressure cell and its implementation |
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| CN108760484A (en) * | 2018-03-22 | 2018-11-06 | 天津城建大学 | Integrating device for measuring inside soil body stress and strain relationship and its test method |
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| CN107859019A (en) * | 2017-12-26 | 2018-03-30 | 天津城建大学 | The complete application apparatus of three-dimensional soil pressure cell and its implementation |
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| CN108801525A (en) * | 2018-03-07 | 2018-11-13 | 中国电力科学研究院有限公司 | Some stress state detectors of plane and detection method |
| CN108760484A (en) * | 2018-03-22 | 2018-11-06 | 天津城建大学 | Integrating device for measuring inside soil body stress and strain relationship and its test method |
| CN108661036A (en) * | 2018-06-11 | 2018-10-16 | 浙江工业大学 | A kind of absorption type sealing device |
| CN109374442A (en) * | 2018-11-09 | 2019-02-22 | 天津城建大学 | Strain value calculating method based on rotational right angle tetrahedron shearing strain test device |
| CN113029417A (en) * | 2021-03-09 | 2021-06-25 | 三峡大学 | Small three-dimensional soil pressure cell suitable for soil deformation field test and model test |
| CN113029417B (en) * | 2021-03-09 | 2023-07-11 | 三峡大学 | Small three-dimensional soil pressure box suitable for soil deformation field test and model test |
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