CN106702998A - High-precision micro flat spade lateral expansion instrument - Google Patents
High-precision micro flat spade lateral expansion instrument Download PDFInfo
- Publication number
- CN106702998A CN106702998A CN201611039037.0A CN201611039037A CN106702998A CN 106702998 A CN106702998 A CN 106702998A CN 201611039037 A CN201611039037 A CN 201611039037A CN 106702998 A CN106702998 A CN 106702998A
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- China
- Prior art keywords
- chamber
- flat
- cover plate
- precision micro
- plate
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D1/00—Investigation of foundation soil in situ
- E02D1/02—Investigation of foundation soil in situ before construction work
- E02D1/022—Investigation of foundation soil in situ before construction work by investigating mechanical properties of the soil
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D2600/00—Miscellaneous
- E02D2600/10—Miscellaneous comprising sensor means
Abstract
The invention discloses a high-precision micro flat spade lateral expansion instrument which is composed of two parts which are a first cavity and a second cavity. The first cavity is formed in the position, close to the sharp end of a spade, on a flat spade plate, and the second cavity is formed in the position, away from the sharp end of the spade, on the flat spade plate. A cover plate with a bolt, a displacement sensor, an O-shaped sealing ring, a piston, a wave spring and an O-shaped sealing ring are sequentially arranged on the first cavity from top to bottom. A cover plate with a bolt, a pressure sensor and an O-shaped sealing ring are sequentially arranged on the second cavity from top to bottom. A nut is arranged on the bottom face of the flat spade plate. The high-precision micro flat spade lateral expansion instrument based on the 3D printing technology has the beneficial effects that in-situ, multifunctionality, visualization, automation, intelligence and the like are achieved, testing is convenient, continuous, fast, accurate and economical, nonlinear characteristics of a soil body can be evaluated, meanwhile, development of the 3D printing technology in geotechnical engineering test equipment is pushed, and fast and effect testing parameters are provided for geotechnical engineering design.
Description
Technical field
The invention belongs to Geotechnical Engineering testing field, more particularly to a kind of high accuracy Dmt of application 3D printing technique
Instrument, belongs to a kind of in-situ test dress of the visual high-precision automatic that can use 3D printing technique in Geotechnical Engineering field
Put.
Background technology
Dmt technology is the home position testing method that the seventies in last century, professor Marchetti proposed, refers to using quiet
After power or hammering power are by a flat spade probe penetration test soil layer, make the steel diaphragm on flat chisel probe laterally swollen using air pressure
Swollen a certain distance, measures its atmospheric pressure value, according to the air pressure and deformation relationship that measure, obtains the parameter of foundation soil, and such as soil is super
Knot is crossed than OCR, the undrained shear strength of soil, coefficient of consolidation of soil etc..Flat Dilatometer Test is had been widely used in the world, and is taken
Obtain good result.China introduces also rapid popularization after Flat Dilatometer Test, but, controlled manually in traditional Flat Dilatometer Test
Hydraulic cylinder system promotes steel membrane, and the displacement of steel membrane determined indirectly by measuring the Volume Changes of air pressure, and this is by band
Carry out some potential errors, along with traditional flat dilatometer is only capable of measuring three readings：Steel membrane is outwards expanded to 0.05mm
With 1.1mm when the bulbs of pressure, and the bulbs of pressure of final release steel membrane when retracting to 0.05mm.Can only provide limited
For given depth, data point during to low stress can only be assumed to linear stress strain paths to stress-strain diagram, it is difficult to obtain
Nonlinear pressure displacement relation is obtained, but existing lot of research is proved, even if the soil body is under low stress strained situation, it is special
It is also nonlinear to levy, and such measurement error can be bigger, it is impossible to the true characteristic for continuously reflecting the soil body.
In recent years with the rapid development of science and technology, the accelerated development of sensor technology, new Dmt technology
Occur, along with reaching its maturity for 3D printing technique, application field is more and more extensive so that manufacture is more intelligent, realize straight
Junction to product manufacturing, software it is integrated, 3D printing technique be based on mathematical model file, with powdery metal or
Plastics etc. can bonding material, be superimposed by continuous physical layer, successively increase material to generate the technology of 3D solid.Although 3D
Printing technique has had many breakthrough applications in many fields, but using little in During Geotechnical Tests field.
The present invention is based on conventional Flat Dilatometer Test, it is proposed that one kind has in situ, multi-functional, automation, intellectuality
The features such as 3D printing technique high-precision micro flat dilatometer so that measurement efficiency is high, result is accurate, is that Geotechnical Engineering is surveyed
Survey design and efficiently and effectively test parameter is provided.
The content of the invention
Technical problem：The technical problem to be solved in the present invention is directed to traditional Flat Dilatometer Test its device measuring error
Greatly, time-consuming, and degree of intelligence is low, the problems such as unitary function, proposes a kind of there is the spies such as in situ, multi-functional, automation, intellectuality
The high-precision micro flat dilatometer of the 3D printing technique of point.Ground geotechnique can be fast and effeciently determined using the test device
Journey mechanical characteristic, and measurement efficiency is high, test result is accurate.
Technical scheme：A kind of high-precision micro flat dilatometer, including flat chisel plate, be arranged on flat chisel plate close to spear end
First chamber and the second chamber away from spear end, be provided with the flat chisel wooden partition between first chamber and second chamber
Through signal transmssion line and the via of pressure-air；The first chamber is top-down hollow out chamber, and bottom radially extends
There is boss；The second chamber is the hollow chamber of bottom lock, and second chamber bottom is provided with pressure sensor, and top passes through
First cover plate for sealing of strap bolt；
Be provided with displacement transducer, piston and wavy spring in the first chamber, the piston by top major diameter
The minor diameter goblet integration of ring and lower section is fabricated by, and the major diameter ring top edge of the top offers connection via
Through hole, can communications signals transmission line and pressure-air to piston inner side, the minor diameter goblet inner side fixed displacement sensing
Device, minor diameter goblet outside is arranged wavy spring, and described wavy spring one end contacts with major diameter ring, one end is positioned over boss
On；First chamber top by the second cover plate for sealing of strap bolt, after sealing, the hypanthial bottom surface of minor diameter and first chamber bottom
Portion flushes；
The signal transmssion line of institute's displacement sensors passes through the signal transmssion line of via and first chamber pressure sensor
Outside is delivered to together.
Further, the bolt in the first cover plate of the strap bolt and the second cover plate of strap bolt is worn from cover plate
Cross, and penetrate flat chisel plate, fixed by nut to flat chisel plate bottom.
Further, the first cover plate of the strap bolt and the second cover plate of strap bolt are sealed by O-ring seal.
Further, it is provided with O-ring seal between the wavy spring bottom and boss.
Further, described flat chisel plate, 45-55mm long, 90-100mm wide, thickness is 13-18mm.
Further, the second chamber can be used for configuring installation signal transmssion line, and for assembling provides space.
Further, the minor diameter goblet inner side sets fluted, in displacement transducer fixed installation groove.
Further, the second cover plate of the first cover plate of the strap bolt and strap bolt, flat chisel plate and piston pass through 3D
Printed material clothing aluminium powder grain is made.
Further, 3D printing material clothing aluminium powder grain stretch modulus is 3850MPa, and density is 1380kg/m3, tensile strength
It is 52MPa, bending modulus is 3700MPa, and bending strength is 80kPa.
Beneficial effect：The present invention solves that traditional Flat Dilatometer Test its device measuring error is big, and time-consuming, degree of intelligence
It is low, the problems such as unitary function, can fast and effeciently determine foundation soil engineering mechanical properties, and measurement efficiency is high, test knot
Fruit is accurate, and repeatability is strong.With direct displacement test system and a larger displacement scope, can not only assess continuous
The soil counterforce characteristic of line pressure shift, while having promoted 3D printing technique in the development and application of Geotechnical Engineering testing equipment.
Brief description of the drawings
Fig. 1 is element assembling figure of the invention；
Fig. 2 is the top view of flat chisel plate；
Fig. 3 is the upward view of flat chisel plate；
Fig. 4 is flat chisel plate working condition upward view.
Specific embodiment
The present invention is described further below in conjunction with the accompanying drawings.
High-precision micro flat dilatometer based on 3D printing technique of the invention：Including flat chisel plate 6, it is arranged at flat chisel plate
On the first chamber 9 close to spear end and the second chamber 10 away from spear end, it is flat between first chamber 9 and second chamber 10
The via through signal transmssion line and pressure-air is provided with shovel board wall；The first chamber 9 is engraved for top-down
Plenum chamber, bottom has radially extended boss 11；The second chamber 10 is the hollow chamber of bottom lock, and second chamber bottom sets
Pressure sensor 8 is equipped with, top is sealed by the first cover plate 1.1 of strap bolt；
Displacement transducer 2, piston 4 and wavy spring 5 are provided with the first chamber 9, the piston 4 is by the big of top
The minor diameter goblet integration of diameter ring and lower section is fabricated by, and the major diameter ring top edge of the top is offered and connected
The through hole in hole, can communications signals transmission line and pressure-air to the inner side of piston 4, minor diameter goblet inner side fixed displacement
Sensor 2, minor diameter goblet outside is arranged wavy spring 5, and the one end of the wavy spring 5 is contacted with major diameter ring, one end is put
It is placed on boss 11；The top of first chamber 9 is sealed by the second cover plate 1.2 of strap bolt, after sealing, the hypanthial bottom of minor diameter
Face flushes with the bottom of first chamber 9；
The signal transmssion line of institute's displacement sensors 2 passes through the signal transmission of via and the pressure sensor 8 of first chamber 9
Line is delivered to outside together.
The design and fabrication of miniature flat dilatometer is divided into the design of miniature Flat Dilatometer Test flat chisel plate, 3D printing flat chisel
Plate, three parts of total system of flat dilatometer, the design of 3D models all parts and installation diagram of flat chisel plate pass through CAD software
Draw and produce.Relate generally to a Flat Dilatometer Test main body flat chisel body, piston, two dismountable 3D printing materials of aluminum powders
With the cover plate of other compositions material.Using a piston of a diameter of 40mm, rather than the steel membrane of conventional 60mm, piston compares steel
Film is more stable especially when displacement becomes much larger.
Second chamber is used for configuring installation circuit and for assembly element provides space.The contact sealing of O-ring different elements
(specifically, the first O-ring seal 3.1 is used for sealing the first cover plate 1.1, the second O-ring seal 3.2 is used for sealing piston 4, the
Three O-ring seals 3.3 are used for sealing the second cover plate 1.2), finally with the bolt on dismountable cover plate through the bolt on flat chisel
Hole, is fixed in flat chisel another side with nut, and in this way, the screw thread being easily damaged avoids its hair in 3D printing material
It is raw.
The miniature flat dilatometer flat chisel plate of 3D printing is mainly and is manufactured in 3D printing technique by laser sintered process
Clothing aluminium powder grain flat chisel, the powder filling aluminum of polyamide 12, polyamide has relatively low fusing point than aluminium in whole process, and sintering produces one
Solid body, it is so more more economical than direct metal laser sintering, because it needs power laser diode higher and metal dust one
Play work.In nonmetallic materials in 3D printing, the characteristics of clothing aluminium powder grain specific high-strength rigidity.3D printing receive from it is any
During the geometry that runs into limit these traditional handicrafts, once Dmt 3D model flat chisels are sent to laser sintered printer
On, prototype can be obtained in the time of one day.3D printing material clothing aluminium powder grain stretch modulus is 3850MPa, and density is
1380kg/m3, tensile strength is 52MPa, and bending modulus is 3700MPa, and bending strength is 80kPa.
Displacement transducer is arranged in the groove of the bottom of piston to test the motion of piston, wavy spring be located at piston with
Between flat chisel, under static state, help to maintain piston and flushed with flat chisel surface line.Pressure sensor is arranged on flat chisel plate
In second chamber, i.e., pressure adjusts exit, real-time atmospheric pressure can be tested, because two side rooms are insertions, in air pressure
Under effect, air pressure is entered in piston by piston top through hole, increases air pressure in piston seal region, and piston is along waveform bullet
Spring direction moves downward, and displacement transducer can measure the real-time displacement of piston, and overall miniature Dmt instrument system passes through
Computer is controlled, and for the data collecting system of Stress control, can automatically record measured value with electricity regulation pressure.It is whole real
Program is tested by computer control, such as loading and unloading circulation, and different plus rate of debarkation, you can draw the reality of pressure-displacement
When curve.
The test device retains and improves the function of conventional Flat Dilatometer Test, solves its device measuring error greatly,
Time-consuming, and degree of intelligence is low, the problems such as unitary function, can fast and effeciently determine foundation soil engineering mechanical properties, and survey
Amount efficiency is high, test result is accurate, and repeatability is strong.With direct displacement test system and a larger displacement scope,
The soil counterforce characteristic of continuous pressure displacement can not only be assessed, and has promoted 3D printing technique to be set in Geotechnical Engineering experiment
Standby development and application.
The above is only the preferred embodiment of the present invention, it is noted that for the ordinary skill people of the art
For member, under the premise without departing from the principles of the invention, some improvements and modifications can also be made, these improvements and modifications also should
It is considered as protection scope of the present invention.
Claims (9)
1. a kind of high-precision micro flat dilatometer, it is characterised in that：Including flat chisel plate (6), it is arranged on flat chisel plate close to shovel
The first chamber (9) and the second chamber (10) away from spear end at tip, it is flat between first chamber (9) and second chamber (10)
The via through signal transmssion line and pressure-air is provided with shovel board wall；The first chamber (9) is top-down
Hollow out chamber, bottom has radially extended boss (11)；The second chamber (10) is the hollow chamber of bottom lock, second chamber
Bottom is provided with pressure sensor (8), and top is sealed by first cover plate (1.1) of strap bolt；
Displacement transducer (2), piston (4) and wavy spring (5) are provided with the first chamber (9), the piston (4) is by upper
The minor diameter goblet integration of the major diameter ring and lower section of side is fabricated by, and the major diameter ring top edge of the top is offered
Connect the through hole of via, can communications signals transmission line and pressure-air to piston (4) inner side, the minor diameter goblet inner side
Fixed displacement sensor (2), minor diameter goblet outside is arranged wavy spring (5), described wavy spring (5) one end and major diameter
Ring contact, one end are positioned on boss (11)；First chamber (9) top is sealed by second cover plate (1.2) of strap bolt, sealing
Afterwards, the hypanthial bottom surface of minor diameter flushes with first chamber (9) bottom；
The signal transmssion line of institute's displacement sensors (2) is passed through via with the signal of first chamber (9) pressure sensor (8)
Defeated line is delivered to outside together.
2. a kind of high-precision micro flat dilatometer according to claim 1, it is characterised in that：The first of the strap bolt
Bolt in second cover plate (1.2) of cover plate (1.1) and strap bolt is passed through from cover plate, and penetrates flat chisel plate, to flat chisel plate
Bottom is fixed by nut.
3. a kind of high-precision micro flat dilatometer according to claim 1 and 2, it is characterised in that：The strap bolt
Second cover plate (1.2) of the first cover plate (1.1) and strap bolt is sealed by O-ring seal.
4. a kind of high-precision micro flat dilatometer according to claim 1, it is characterised in that：The wavy spring (5)
O-ring seal is provided between bottom and boss (11).
5. a kind of high-precision micro flat dilatometer according to claim 1, it is characterised in that：Described flat chisel plate (6),
45-55mm long, 90-100mm wide, thickness is 13-18mm.
6. a kind of high-precision micro flat dilatometer according to claim 1, it is characterised in that：The second chamber (10)
Can be used for configuring installation signal transmssion line, and for assembling provides space.
7. a kind of high-precision micro flat dilatometer according to claim 1, it is characterised in that：The minor diameter goblet
Inner side sets fluted, in displacement transducer fixed installation groove.
8. a kind of high-precision micro flat dilatometer according to claim 1, it is characterised in that：The first of the strap bolt
Second cover plate (1.2) of cover plate (1.1) and strap bolt, flat chisel plate (6) and piston are made by 3D printing material clothing aluminium powder grain
Form.
9. a kind of high-precision micro flat dilatometer according to claim 8, it is characterised in that：3D printing material clothing aluminium powder
Grain stretch modulus is 3850MPa, and density is 1380kg/m3, and tensile strength is 52MPa, and bending modulus is 3700MPa, and bending is strong
It is 80kPa to spend.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611039037.0A CN106702998B (en) | 2016-11-21 | 2016-11-21 | A kind of high-precision micro flat dilatometer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611039037.0A CN106702998B (en) | 2016-11-21 | 2016-11-21 | A kind of high-precision micro flat dilatometer |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106702998A true CN106702998A (en) | 2017-05-24 |
| CN106702998B CN106702998B (en) | 2018-08-17 |
Family
ID=58940257
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201611039037.0A Active CN106702998B (en) | 2016-11-21 | 2016-11-21 | A kind of high-precision micro flat dilatometer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106702998B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115110509A (en) * | 2022-07-21 | 2022-09-27 | 上海旻悦勘察设计有限公司 | Deep soil body side direction load test probe |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SU1609855A1 (en) * | 1989-03-07 | 1990-11-30 | Калининский политехнический институт | Dilatometer |
| CN202899117U (en) * | 2012-10-30 | 2013-04-24 | 台州市建元工程勘察仪器有限公司 | Test head device special for flat spade diameter test device |
| CN103306254A (en) * | 2013-06-08 | 2013-09-18 | 温岭市迪信勘察仪器有限公司 | Probe for testing lateral load of deep soil |
| CN203320506U (en) * | 2013-07-02 | 2013-12-04 | 温岭市迪信勘察仪器有限公司 | Pore pressure displacement chisel probe |
| JP2014190041A (en) * | 2013-03-27 | 2014-10-06 | Kiso Jiban Consultants Kk | Penetration type lateral load test method and penetration type lateral load test device |
| CN204125928U (en) * | 2014-10-24 | 2015-01-28 | 内蒙古工业大学 | Portable static lateral pressure coefficient analyzer |
-
2016
- 2016-11-21 CN CN201611039037.0A patent/CN106702998B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SU1609855A1 (en) * | 1989-03-07 | 1990-11-30 | Калининский политехнический институт | Dilatometer |
| CN202899117U (en) * | 2012-10-30 | 2013-04-24 | 台州市建元工程勘察仪器有限公司 | Test head device special for flat spade diameter test device |
| JP2014190041A (en) * | 2013-03-27 | 2014-10-06 | Kiso Jiban Consultants Kk | Penetration type lateral load test method and penetration type lateral load test device |
| CN103306254A (en) * | 2013-06-08 | 2013-09-18 | 温岭市迪信勘察仪器有限公司 | Probe for testing lateral load of deep soil |
| CN203320506U (en) * | 2013-07-02 | 2013-12-04 | 温岭市迪信勘察仪器有限公司 | Pore pressure displacement chisel probe |
| CN204125928U (en) * | 2014-10-24 | 2015-01-28 | 内蒙古工业大学 | Portable static lateral pressure coefficient analyzer |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115110509A (en) * | 2022-07-21 | 2022-09-27 | 上海旻悦勘察设计有限公司 | Deep soil body side direction load test probe |
| CN115110509B (en) * | 2022-07-21 | 2023-09-19 | 上海旻悦勘察设计有限公司 | Deep soil lateral load test probe |
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| Publication number | Publication date |
|---|---|
| CN106702998B (en) | 2018-08-17 |
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