CN106226162B - A kind of improved soil static lateral pressure coefficient analyzer - Google Patents
A kind of improved soil static lateral pressure coefficient analyzer Download PDFInfo
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- CN106226162B CN106226162B CN201610560098.5A CN201610560098A CN106226162B CN 106226162 B CN106226162 B CN 106226162B CN 201610560098 A CN201610560098 A CN 201610560098A CN 106226162 B CN106226162 B CN 106226162B
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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
- G01N3/10—Investigating strength properties of solid materials by application of mechanical stress by applying steady tensile or compressive forces generated by pneumatic or hydraulic pressure
- G01N3/12—Pressure testing
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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
- G01N2203/003—Generation of the force
- G01N2203/0042—Pneumatic or hydraulic means
- G01N2203/0048—Hydraulic means
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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
- G01N2203/02—Details not specific for a particular testing method
- G01N2203/026—Specifications of the specimen
- G01N2203/0284—Bulk material, e.g. powders
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- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
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- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
- Sampling And Sample Adjustment (AREA)
- Investigation Of Foundation Soil And Reinforcement Of Foundation Soil By Compacting Or Drainage (AREA)
Abstract
The present invention provides a kind of improved soil static lateral pressure coefficient analyzers, increase by four ballast sensors, weighing terminal box and weighing displaying controller on the basis of existing analyzer, wherein, four weighing sensors are placed on the pedestal top of soil static lateral pressure coefficient analyzer, at test specimen tube bottom, to replace supporting pad to support test specimen tube, and measure sample and test specimen tube sidewall friction power；Ballast sensor is connected with weighing terminal box respectively, and weighing terminal box is connected with weighing displaying controller；Weighing terminal box is summarized by force signal and is adjusted angular difference for four weighing sensors, will finally be summarized and is transferred to weighing displaying controller by force signal；Weighing displaying controller receives the summarizing by force signal of weighing terminal box input, and by pressure that four ballast sensors are subject to and shows；Pressure that four ballast sensors that weighing displaying controller is shown are subject to and, i.e. sidewall friction power size.The present invention is easy to use, and measurement result is accurate.
Description
Technical field
The invention belongs to Soil Parameters measuring device field, in particular to a kind of improved soil static lateral pressure coefficient is surveyed
Determine instrument.
Background technique
Static lateral pressure coefficient refers to the soil body compressed horizontal direction principal stress and vertical master under the conditions of no lateral deformation
The ratio between stress, i.e., the ratio between horizontal direction principal stress and vertical principal stress under virgin state of stress are that one very in geotechnical engineering
Important parameter, practical ranges are more and more wide, as determined the stress state in horizontal field, calculating earth pressure at rest, soil
Pore water pressure, stake side-friction force of dam construction time etc. need accurately to measure static lateral pressure coefficient.
Existing soil static lateral pressure coefficient analyzer measuring principle are as follows: analyzer axial loading device applies vertical lotus
It carries, load is measured by load sensor；After vertical load applies, sample has lateral deformation trend, by the drawing for connecting test specimen tube
Pressure sensor limits sample lateral deformation, measures sample lateral swelling force at this time, i.e. lateral force is sensed by two pairs of pressures
Device measurement；Vertical stress and lateral stress are obtained according to the conversion of the vertical force and lateral force of measurement；Static lateral pressure coefficient is by side
It is acquired to the ratio between stress and vertical stress.However, load sensor measures vertical lotus due to the influence of test specimen tube sidewall friction power
It carries and is greater than the practical vertical force being subject to of the soil body, the vertical stress for causing conversion to obtain is bigger than actual value, so that last calculate
Obtained static lateral pressure coefficient is less than normal.
The present invention is a kind of improvement based on patent 201210473962.X.
Summary of the invention
Goal of the invention: to solve the problems, such as soil static lateral pressure coefficient analyzer, the present invention provides one kind
Soil static lateral pressure coefficient analyzer Curve guide impeller eliminates the soil body and test cylinder sidewall friction power to the shadow of Instrumental results
It rings.
The present invention technical problem also to be solved is to provide a kind of soil body and rigid body sidewall friction force coefficient asked
Method.
Technical solution: a kind of improved soil static lateral pressure coefficient analyzer provided by the invention, for existing soil
The Curve guide impeller of body static lateral pressure coefficient analyzer, the existing soil static lateral pressure coefficient analyzer includes pressure
Room, loading device, measuring and controlling；The loading device is connect with pressure chamber；The pressure chamber includes pedestal (101), sets
In on pedestal bottom plate and support pads, the test specimen tube on support pads, with test specimen tube top opening cooperation top board, under
Pressurization cover board and the load sensor being sequentially arranged on and on top board；The bottom plate is the identical half-round metal of two panels radius
Board group at circular bottom plate；The bottom base plate is equipped with the first ball cavity group, is equipped with ball in the first ball cavity group；It is described
It is equipped with the second ball cavity group at the top of support pads, is equipped with ball in the second ball cavity group；The test specimen tube is by two radiuses
Identical cylinder semicircular cylinder composition and connected on outer side wall by least two pairs of pull pressure sensor；The top board is two
The identical half-round metal board group of piece radius at round top board；The pressurization cover board bottom surface is equipped with third ball cavity group,
Ball is equipped in the third ball cavity group；The signaling interface of the measuring and controlling is sensed with loading device, loading respectively
Device and pull pressure sensor connection；The measuring and controlling outputs signal to loading device, the load sensor and drawing
Pressure sensor outputs signal to measuring and controlling；
Wherein, increase by four ballast sensors on the basis of above-mentioned soil static lateral pressure coefficient analyzer, weighing connects
Wire box and weighing displaying controller,
Wherein, four weighing sensors are placed on the pedestal top of soil static lateral pressure coefficient analyzer, examination
At sample cylinder bottom, to replace supporting pad to support test specimen tube, and sample and test specimen tube sidewall friction power are measured；The ballast sensor
It is connected respectively with the weighing terminal box, the weighing terminal box is connected with the weighing displaying controller；The weighing wiring
Box is summarized by force signal and is adjusted angular difference for four weighing sensors, will finally summarize that be transferred to weighing by force signal aobvious
Show controller；The weighing displaying controller receives the summarizing by force signal of weighing terminal box input, and four ballasts are passed
The pressure and show that sensor is subject to；Pressure that four ballast sensors that weighing displaying controller is shown are subject to and, i.e. side
Wall friction power size.
The soil static lateral pressure coefficient analyzer includes being made of two semicircular cylinders and being connected by pull pressure sensor
Test specimen tube converts to obtain sample lateral stress so as to directly measure lateral swelling force by pull pressure sensor；Test specimen tube bottom
Portion's bottom plate and the top board at top are force transmitting board, respectively include two semi-circular plates, between bottom semicircular plate and pedestal, top half
Ball is set between plectane and pressurization cover board to reduce frictional force, to keep measurement result more acurrate.
It is described by two half-round metals as a kind of a kind of improvement of soil static lateral pressure coefficient analyzer of the present invention
Board group at bottom plate, by two half-round metal board groups at top board and the diameter of the test specimen tube being made of two semicircular cylinders break
Mouth is in the same plane；After making stress, bottom plate, top board and the test specimen tube direction of motion are consistent, ensure that measurement knot
Fruit it is accurate.
Another as a kind of soil static lateral pressure coefficient analyzer of the present invention improves, and sets among the base top
There is the positioning pin of protrusion, the bottom base plate is equipped with the groove with base top detent fit；By raised positioning pin and recessed
Slot is worked in coordination, so that bottom plate be made to position and be firmly fixed on pedestal, avoiding bottom plate from not being placed in center leads to pressure
Equipment is unevenly set to generate displacement, to ensure that the accurate of measurement result.
Another as a kind of soil static lateral pressure coefficient analyzer of the present invention improves, and the support pads are to be fixed on
The cuboid cushion block being oppositely arranged at the top of base edge, quantity are 2 to 4 pairs.
Another as a kind of soil static lateral pressure coefficient analyzer of the present invention improves, the pull pressure sensor
Quantity is 2 to 4 pairs, relatively uniform to be set on test specimen tube lateral wall.
Another as a kind of soil static lateral pressure coefficient analyzer of the present invention improves, and the first ball cavity group is equal
It is even to be distributed in bottom base plate, arrange that ball, ball can freely be rolled in base top surface in ball cavity.
Another as a kind of soil static lateral pressure coefficient analyzer of the present invention improves, and the second ball cavity group is equal
It is even to be distributed at the top of support pads, ball is arranged in ball cavity.
Another as a kind of soil static lateral pressure coefficient analyzer of the present invention improves, and the third ball cavity group is equal
It is even to be distributed in pressurization lid board bottom portion, ball is arranged in ball cavity.
Another as a kind of soil static lateral pressure coefficient analyzer of the present invention improves, and the loading device includes adding
Compressing cylinder and the mobilizable pressure frame of top margin, the pressurization oil cylinder and pressure chamber are sequentially arranged in pressure frame from bottom to top；Pass through
The oil cylinder that pressurizes presses to pressure chamber base, provides counter-force by pressure frame top margin, to realize the pressurization to sample in pressure chamber.
The utility model has the advantages that soil static lateral pressure coefficient analyzer structure provided by the invention is simple, easy to use, measurement knot
Fruit is accurate, applied widely, can be used for measuring the static side pressure of the various soil bodys including coarse-grained soil and general clay, sand
Force coefficient.
Detailed description of the invention
Fig. 1 soil static lateral pressure coefficient analyzer original design (cross-sectional view)；
Fig. 2 soil static lateral pressure coefficient analyzer Curve guide impeller (cross-sectional view)；
Fig. 3 Curve guide impeller station diagram (top view)；
1 relational graph of K0- σ of Fig. 4 sand sample；
Wherein, appended drawing reference is respectively as follows: 1 for pressure chamber, and 2 be loading device, and 3 be measuring and controlling, and 101 be pedestal,
102 be bottom plate, and 103 be supporting pad, and 104 be test specimen tube, and 105 be top board, and 106 be pressurization cover board, and 107 be load sensor,
108 be pull pressure sensor, and 109 be positioning pin, and 110 be groove, and 111 ballast sensors, 112 be weighing terminal box, and 113 be title
Weight display controller, 201 be pressurization oil cylinder, and 202 be pressure frame.
Specific embodiment
The soil static lateral pressure coefficient analyzer of improvement of the present invention makes further explanation with reference to the accompanying drawing.
The contents of the present invention are described in detail with reference to the accompanying drawing.
Fig. 1 is the cross-sectional view of soil static lateral pressure coefficient analyzer original design, and structure composition and application method are draped over one's shoulders
It is exposed in patent 201210473962.X, specifically comprising pressure chamber 1, loading device 2, measuring and controlling 3.Wherein, it presses
Power room 1 includes pedestal 101, the bottom plate 102 on pedestal 101 and support pads 103, the test specimen tube on support pads 103
104, the top board 105 cooperated with 104 top opening of test specimen tube, the pressurization cover board being sequentially arranged on top board 105 from bottom to top
106 and load sensor 107.101 top center of pedestal is additionally provided with the positioning pin 109 of protrusion, and 102 bottom of bottom plate is equipped with and pedestal
The groove 110 of 101 top dowel pins 109 cooperation；Bottom plate 102 be the identical half-round metal board group of two panels radius at circular base
Plate, bottom are evenly arranged with the first ball cavity group, are equipped with ball in the first ball cavity group.Support pads 103 are to be fixed on pedestal
The cushion block that 101 edge tops are oppositely arranged, optionally, support pads 103 are 2 to 4 pairs of cuboid cushion blocks being oppositely arranged；Bearing
It is evenly arranged with the second ball cavity group at the top of pad 103, is equipped with ball in the second ball cavity group.Test specimen tube 104 is by two radiuses
Identical cylinder semicircular cylinder composition and connected on outer side wall by 2 pairs of pull pressure sensor 108, optionally, pressure passes
The quantity of sensor 108, which also can according to need, is set as two pairs of reasonable quantity of any of the above, relatively uniform to be set to test specimen tube
On 104 lateral walls, it is therefore preferable to 2 to 4 pairs；Top board 105 be the identical half-round metal board group of two panels radius at circle on
Pressing plate；Pressurization 106 bottom surface of cover board is evenly arranged with third ball cavity group, is equipped with ball in third ball cavity group.By two and half
The bottom plate 102 of circular metal plate composition, by two half-round metal board groups at top board 105 and be made of two semicircular cylinders
The diameter fracture of test specimen tube 104 be in the same plane.
Loading device 2 includes pressurization oil cylinder 201 and the mobilizable pressure frame 202 of top margin, the pressurization oil cylinder 201 and pressure
Room 1 is sequentially arranged in from bottom to top in pressure frame 202.
The signaling interface of measuring and controlling 3 respectively with loading device 2, load sensor 107 and pull pressure sensor
108 connections, measuring and controlling 3 output signal to loading device 2, and load sensor 107 and pull pressure sensor 108 export
Signal is to measuring and controlling 3.
Fig. 2, Fig. 3 are the cross-sectional view and top view of soil static lateral pressure coefficient analyzer Curve guide impeller respectively.Comparison
Known to Fig. 1 and Fig. 2: the Curve guide impeller includes four weighing sensors 111, weighing terminal box 112, weighing displaying controller 113
(see Fig. 3).Wherein, four weighing sensors 111 are placed on to the bottom of test specimen tube 104,101 top of bottom of analyzer, to claim
Retransmitting sensor (111) replaces supporting pad 103 to support test specimen tube, four ballast sensors 111 by force signal in weighing terminal box
112 are collected and are shown by weighing displaying controller 113, and the frictional force in experimentation can be thus obtained, into
And the friction coefficient of sample and side wall is obtained, and evade friction effects calculating static lateral pressure coefficient.
Measuring method, condition: the soil body to be measured is placed in test specimen tube 104, is pressurizeed by pressurization oil cylinder 201, to pass through
202 top margin of pressure frame provides counter-force, and power passed through respectively load sensor 107, pressurization cover board 106, third ball set and on
Pressing plate 105 is transmitted at the top of sample, and measures vertical load by load sensor 107, is surveyed by four weighing sensors 111
Sidewall friction power is measured, vertical load is subtracted into sidewall friction power and both obtains sample true vertical power；It is surveyed by pull pressure sensor 108
Determine lateral swelling force；Vertical stress and lateral stress are obtained according to the conversion of the true vertical power and lateral force of measurement；Static side pressure
Force coefficient is acquired by the ratio between lateral stress and vertical stress.
Measurement result: lateral force that sample vertical force that load sensor 107 obtains, stretch sensor 108 obtain, ballast
The sidewall friction power that sensor 111 obtains is shown in table 1.Thus quiet when corresponding vertical stress and lateral stress can be calculated
Only lateral pressure coefficient K0, and vertical stress and static lateral pressure coefficient relation curve are drawn, as shown in Figure 4.Measured Stationary side
Pressure coefficient meets general understanding.
1 sand sample testing data of table
Claims (9)
1. a kind of improved soil static lateral pressure coefficient analyzer, for existing soil static lateral pressure coefficient analyzer
Curve guide impeller, the existing soil static lateral pressure coefficient analyzer include pressure chamber (1), loading device (2), measurement control
Device (3)；The loading device (2) connect with pressure chamber (1)；The pressure chamber (1) includes pedestal (101), is set to pedestal
(101) bottom plate (102) and support pads (103) on, the test specimen tube (104) being set on support pads (103), with test specimen tube (104)
The top board (105) of top opening cooperation, the pressurization cover board (106) being sequentially arranged on top board (105) from bottom to top and loading
Sensor (107)；The bottom plate (102) be the identical half-round metal board group of two panels radius at circular bottom plate；The bottom plate
(102) bottom is equipped with the first ball cavity group, is equipped with ball in the first ball cavity group；It is equipped at the top of the support pads (103)
Second ball cavity group, the second ball cavity group is interior to be equipped with ball；The test specimen tube (104) is by the identical semicircle of two radiuses
Cylinder cylinder composition and connected on outer side wall by least two pairs of pull pressure sensor (108)；The top board (105) is two
The identical half-round metal board group of piece radius at round top board；Pressurization cover board (106) bottom surface is equipped with third ball
Chamber group, the third ball cavity group is interior to be equipped with ball；The signaling interface of the measuring and controlling (3) respectively with loading device
(2), load sensor (107) and pull pressure sensor (108) connection；The measuring and controlling (3), which outputs signal to, to be added
It carries and sets (2), the load sensor (107) and pull pressure sensor (108) output signal to measuring and controlling (3)；
It is characterized by: on the basis of above-mentioned soil static lateral pressure coefficient analyzer increase by four ballast sensors (111),
Weighing terminal box (112) and weighing displaying controller (113),
Wherein, four weighing sensors (111) are placed on the pedestal (101) of soil static lateral pressure coefficient analyzer
At portion, test specimen tube (104) bottom, to replace supporting pad (103) to support test specimen tube, and sample and test specimen tube sidewall friction are measured
Power；The ballast sensor (111) is connected with the weighing terminal box (112) respectively, the weighing terminal box (112) with it is described
Weighing displaying controller (113) is connected；Weighing terminal box (112) by four weighing sensors (111) by force signal into
Row summarizes and adjusts angular difference, will finally summarize and is transferred to weighing displaying controller (113) by force signal；The weighing display control
Device connect (113) receive weighing terminal box input the pressure for summarizing by force signal, and four ballast sensors (111) being subject to and
It shows；The pressure that is subject to of four ballast sensors (111) of weighing displaying controller (113) display and, i.e. sidewall friction
The sum of power and the gravity of test specimen tube.
2. improved soil static lateral pressure coefficient analyzer according to claim 1, which is characterized in that described by two
Half-round metal board group at bottom plate (102), by two half-round metal board groups at top board (105) and by two semicircular cylinders
The diameter fracture of the test specimen tube (104) of composition is in the same plane.
3. improved soil static lateral pressure coefficient analyzer according to claim 1, which is characterized in that the pedestal
(101) top center is equipped with positioning pin (109), and bottom plate (102) bottom is equipped with and pedestal (101) top dowel pin (109)
The groove (110) of cooperation.
4. improved soil static lateral pressure coefficient analyzer according to claim 1, which is characterized in that the support pads
It (103) is the cuboid cushion block being oppositely arranged for being fixed on pedestal (101) edge top, quantity is 2 to 4 pairs.
5. improved soil static lateral pressure coefficient analyzer according to claim 1, which is characterized in that the pressure
The quantity of sensor (108) is 2 to 4 pairs, relatively uniform to be set on test specimen tube (104) lateral wall.
6. improved soil static lateral pressure coefficient analyzer according to claim 1, which is characterized in that first rolling
Pearl chamber group is uniformly distributed in bottom plate (102) bottom.
7. improved soil static lateral pressure coefficient analyzer according to claim 1, which is characterized in that second rolling
Pearl chamber group is uniformly distributed at the top of support pads (103).
8. improved soil static lateral pressure coefficient analyzer according to claim 1, which is characterized in that the third rolling
Pearl chamber group is uniformly distributed in pressurization cover board (106) bottom.
9. improved soil static lateral pressure coefficient analyzer according to claim 1, which is characterized in that the load dress
Setting (2) includes pressurization oil cylinder (201) and the mobilizable pressure frame of top margin (202), the pressurization oil cylinder (201) and pressure chamber (1)
It is sequentially arranged in pressure frame (202) from bottom to top.
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| CN106226162B true CN106226162B (en) | 2019-02-12 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107036901B (en) * | 2017-04-28 | 2019-12-24 | 武汉大学 | Monofilament drawing test device capable of applying lateral pressure |
| CN109655338B (en) * | 2018-12-13 | 2021-04-23 | 深圳宏业基岩土科技股份有限公司 | Method for controlling rock-socketed quality of rock-socketed pile |
| CN110308263B (en) * | 2019-07-18 | 2024-01-26 | 天水红山试验机有限公司 | Coarse-grained soil compression test pressure chamber |
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| CN104849146A (en) * | 2015-06-01 | 2015-08-19 | 上海市城市建设设计研究总院 | Air pressure loading device for static lateral pressure coefficient K0 meter |
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| CN1699997A (en) * | 2005-06-16 | 2005-11-23 | 长安大学 | Soil one-dimensional consolidation, penetration and stress looseness comprehensive test apparatus and method of use thereof |
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Application publication date: 20161214 Assignee: Changchun QIHANG Test Instrument Co.,Ltd. Assignor: HOHAI University Contract record no.: X2020320000407 Denomination of invention: An improved instrument for measuring static lateral pressure coefficient of soil Granted publication date: 20190212 License type: Common License Record date: 20201229 |
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