CN107022994B - The miniature dynamic spy instrument of one kind and test method - Google Patents
The miniature dynamic spy instrument of one kind and test method Download PDFInfo
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- CN107022994B CN107022994B CN201710223332.XA CN201710223332A CN107022994B CN 107022994 B CN107022994 B CN 107022994B CN 201710223332 A CN201710223332 A CN 201710223332A CN 107022994 B CN107022994 B CN 107022994B
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- hammer
- feeler lever
- test
- instrument
- guide rod
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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
-
- 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
- G01N3/32—Investigating strength properties of solid materials by application of mechanical stress by applying repeated or pulsating forces
- G01N3/34—Investigating strength properties of solid materials by application of mechanical stress by applying repeated or pulsating forces generated by mechanical means, e.g. hammer blows
-
- 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
- G01N2203/0032—Generation of the force using mechanical means
- G01N2203/0039—Hammer or pendulum
-
- 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)
- Analytical Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Soil Sciences (AREA)
- Health & Medical Sciences (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Physics & Mathematics (AREA)
- Biochemistry (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Mining & Mineral Resources (AREA)
- Paleontology (AREA)
- Civil Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Investigation Of Foundation Soil And Reinforcement Of Foundation Soil By Compacting Or Drainage (AREA)
- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
Abstract
The invention discloses a kind of miniature dynamic spys instrument and test method, moving and visiting instrument includes probe, feeler lever, hammer seat, guide rod, replaceable to drop hammer and cover plate；Method includes the following steps: to prepare sample, leveling specimen surface with die trial, and records specimen height；According to the soft or hard degree of tested sample, selection is suitably dropped hammer, and is packed into feeler lever for dropping hammer；Nose cone is directed at the soil sample surface to be detected, and ensures that feeler lever is vertical with soil sample surface；By drop hammer lifting to overhead gage, then loosing one's grip makes free-falling of dropping hammer；When feeler lever enters sample 20mm, take out feeler lever, and record drop hammer at this time hit number, test terminates, arrange instrument and equipment；Carry out parallel test；Finishing analysis test data.Dynamic spy instrument of the invention is small in size, easy to carry；It is easy to operate, it can quickly obtain test result；Multiple groups test can be carried out under experimental condition at the scene, reduces test error, improves test accuracy.
Description
Technical field
The present invention relates to geotechnical engineering the field of test technology, especially a kind of miniature dynamic spy instrument and test method.
Background technique
At present in the construction of the engineerings such as building construction, road engineering, municipal works and hydraulic engineering, generally moved
Power cone penetration test, dynamic penetration test are very important on-the-spot test means in geotechnical engineering investigation.Dynamic penetrometer is benefit
Conehead is transmitted to by injection bar with its kinetic energy caused by free-falling that drops hammer, conehead is made to overcome the resistance injection of the soil body to soil
In body, the change of properties of soil layer is differentiated according to the impedance magnitude squeezed into soil, mechanics layering can be carried out to soil layer, and determine soil
The physico-mechanical properties of layer carry out engineering properties evaluation to foundation soil.But common dynamic penetrometer exists in use
Following defect: weight is big, not easy to operate, large labor intensity, and the accuracy of feeler inspection index is difficult to the data for being guaranteed, providing
Often error is larger.
Summary of the invention
Technical problem to be solved by the present invention lies in provide the miniature dynamic spy instrument of one kind and test method, easy to carry, behaviour
Make simply, to can be improved the precision of dynamic penetration test.
In order to solve the above technical problems, the present invention provides a kind of miniature dynamic spy instrument, comprising: probe 1, feeler lever 2 are hammered seat 3 into shape, led
Bar 4, replaceable 5 and the cover plate 6 of dropping hammer；It is followed successively by probe 1, feeler lever 2, hammer seat 3, guide rod 4, replaceable 5 and the lid of dropping hammer from top to bottom
Piece 6, probe 1, feeler lever 2, hammer seat 3 and guide rod 4 are a non-removable adult, replaceable 5 free skatings on guide rod 4 of dropping hammer
Dynamic, cover plate 6 and guide rod 4 are connected through a screw thread.
Preferably, probe 1 is high 10mm, the cone that cone angle is 60 °.
Preferably, the cylindrical body that feeler lever 2 is high 10mm, diameter is 16mm.
Preferably, the cylindrical body that hammer seat 3 is high 20mm, diameter is 50mm.
Preferably, the cylindrical body that guide rod 4 is high 165mm, diameter is 16mm, top 5mm have screw thread.
Preferably, drop hammer 5 be 20mm for high 60mm, internal diameter annulus, overhead gage is high 5mm, outer diameter is 40mm and guide rod 4
The round nut that top matches.
Correspondingly, a kind of miniature dynamic test method for visiting instrument, includes the following steps:
(1) sample is prepared with die trial, flattens specimen surface, and record specimen height；
(2) according to the soft or hard degree of tested sample, selection is suitably dropped hammer, and is packed into feeler lever for dropping hammer；
(3) nose cone is directed at the soil sample surface to be detected, and ensures that feeler lever is vertical with soil sample surface；
(4) by drop hammer lifting to overhead gage, then loosing one's grip makes free-falling of dropping hammer；
(5) when feeler lever enters sample 20mm, take out feeler lever, and record drop hammer at this time hit number；Test terminates, and arranges instrument
Device equipment；
(6) parallel test is carried out；Dynamic detection examination is carried out to the different location of same sample, it is desirable that test gained hits number twice
Difference be no more than both average value 5%；
(7) finishing analysis test data.
Preferably, in step (1), die trial internal diameter 152mm, height 170mm, pad thickness 50mm.
The invention has the benefit that dynamic spy instrument of the invention is small in size, it is easy to carry；It is easy to operate, it can quickly obtain
Test result；Multiple groups test can be carried out under experimental condition at the scene, reduces test error, improves test accuracy.
Detailed description of the invention
Fig. 1 is the structural diagram of the present invention.
Wherein, 1, probe；2, feeler lever；3, seat is hammered into shape；4, guide rod；5, replaceable to drop hammer；6, cover plate.
Specific embodiment
As shown in Figure 1, a kind of miniature dynamic spy instrument, including probe 1, feeler lever 2, hammer seat 3, guide rod 4, replaceable 5 and the lid of dropping hammer into shape
Piece 6；It is followed successively by probe 1, feeler lever 2, hammer seat 3, guide rod 4, replaceable drop hammer 5 and cover plate 6, probe 1, feeler lever 2, hammer seat from top to bottom
3 and guide rod 4 be a non-removable adult, replaceable to drop hammer 5 free to slide on guide rod 4, cover plate 6 and guide rod 4 pass through spiral shell
Line connection.Probe 1 is high 10mm, the cone that cone angle is 60 °.The cylindrical body that feeler lever 2 is high 10mm, diameter is 16mm.Hammer seat 3 into shape
The cylindrical body for being 50mm for high 20mm, diameter.The cylindrical body that guide rod 4 is high 165mm, diameter is 16mm, top 5mm have screw thread.
Drop hammer 5 be 20mm for high 60mm, internal diameter annulus, overhead gage is high 5mm, outer diameter is circle that 40mm is matched with 4 top of guide rod
Shape nut.For the miniature dynamic dimensional structure for visiting instrument with reference to the relative configurations of GCO probe GCO instrument, above-mentioned size is to pass through test
Determining preferred size, the size is in the case where meeting test request while having the advantages that portable easy-operating.
The quality and size dropped hammer are respectively as follows: 148g, 305g, 444g；Three kinds of height dropped hammer are 60mm, and internal diameter is
20mm, 148g drop hammer outer diameter as 30mm, and 305g drops hammer outer diameter as 35mm, and 444g drops hammer outer diameter as 40mm.Select these three specifications
To drop hammer be sample for test different types, such as: sand, silt, cohesive soil etc..
Correspondingly, a kind of miniature dynamic test method for visiting instrument, includes the following steps:
(1) sample is prepared with die trial, flattens specimen surface, and record specimen height；Die trial internal diameter 152mm, height
170mm, pad thickness 50mm；
(2) according to the soft or hard degree of tested sample, selection is suitably dropped hammer, and is packed into feeler lever for dropping hammer；
(3) nose cone is directed at the soil sample surface to be detected, and ensures that feeler lever is vertical with soil sample surface；
(4) by drop hammer lifting to overhead gage, then loosing one's grip makes free-falling of dropping hammer；
(5) when feeler lever enters sample 20mm, take out feeler lever, and record drop hammer at this time hit number；Test terminates, and arranges instrument
Device equipment；
(6) parallel test is carried out；Dynamic detection examination is carried out to the different location of same sample, it is desirable that test gained hits number twice
Difference be no more than both average value 5%；
(7) finishing analysis test data.
Embodiment one
Test specification is carried out by taking the clay of somewhere as an example.Atterberg Limit, specific gravity test are carried out to the clay, to obtain the clay
Atterberg Limit and specific gravity；To the clay carry out staight scissors, consolidation test, come obtain clay c,Value, the compressed coefficient, compression modulus
Deng.
(1) physical property test of clay
Referring to " highway earthwork test rule JTG_E40-2007 ", respectively according to dish-style liquid limit apparatus method, rubbing method and ratio
Weight bottle method is measured the liquid limit, plastic limit and specific gravity of the clay, and gained test data is as shown in table 1.
Liquid limit, plastic limit and the specific gravity of 1 clay of table
(2) consolidation, staight scissors, the miniature dynamic trial and error test of geotechnique
It is heuristiced referring to " highway earthwork test rule JTG_E40-2007 " consolidation, consolidated quick shear and miniature move for carrying out soil
It tests.Select quality dropping hammer for 305g.Test data is as shown in table 2.
Staight scissors, consolidation and the miniature dynamic trial and error test data of 2 clay of table
(3) data are analyzed
Hitting number with the viscous soil's water content, cohesive strength, internal friction angle, compression by small power feeler inspection known to fitting is
Relationship between number, compression modulus.Table 3 is the relationship that dynamic sounding is hit between several and clay.
Dynamic visit of table 3 hits several and clay moisture content, staight scissors, consolidates the relational expression between data
| Index | Drop hammer 2 | R2 |
| ω/% | Y=-0.0718x+38.752 | 0.9723 |
| C/kpa | Y=0.8376e0.0209x | 0.8698 |
| a1-2/Mpa-1 | Y=-0.0024x+1.0271 | 0.9943 |
| Es1-2/Mpa | Y=0.0057x+1.6023 | 0.9761 |
Table 3 is analyzed it is found that using same drop hammer, several and different water cut is hit in dynamic spy to the cohesive soil
And obtained under the conditions of the moisture content cohesive strength, the compressed coefficient, there are apparent correlations between compression modulus.
Therefore to same clay, under identical experiment condition, can by miniature dynamic trial and error test come indirect determination its
The indexs such as moisture content, cohesive strength, the compressed coefficient, compression modulus.Sample is tested with miniature dynamic spy instrument, can quickly be obtained
The indexs such as moisture content, cohesive strength, the compressed coefficient, compression modulus.
Embodiment two
Physico-mechanical properties and miniature dynamic trial and error test are carried out to several frequently seen soil, miniature dynamic spy is established by relevant calculation
Hit the relationship between several and its characteristic load bearing capacity.
According to a variety of cohesive soils, silt and Extra-fine sand are carried out mechanics index of physics test and it is miniature it is dynamic visit (hammer weight:
Resulting data 305g) are tested, analysis and summary obtains hitting several relationships about the characteristic load bearing capacity of a variety of soil and miniature dynamic spy
Table, as shown in table 4- table 6.
Several relation tables are hit in 4 Clay Bearing Capacity characteristic value of table and miniature dynamic spy
Several relation tables are hit in 5 silt characteristic load bearing capacity of table and miniature dynamic spy
Several relation tables are hit in 6 Extra-fine sand characteristic load bearing capacity of table and miniature dynamic spy
By above-mentioned relation table it is found that the pass between the several and bearing capacity of variety classes soil is hit in the miniature dynamic dynamic spy for visiting instrument
System.Quickly and effectively the bearing capacity of soil sample can be judged in conjunction with miniature dynamic spy instrument.
Although the present invention is illustrated and has been described with regard to preferred embodiment, it is understood by those skilled in the art that
Without departing from scope defined by the claims of the present invention, variations and modifications can be carried out to the present invention.
Claims (3)
1. a kind of miniature dynamic spy instrument characterized by comprising probe (1), feeler lever (2) are hammered into shape seat (3), and guide rod (4) is replaceable to fall
Hammer (5) and cover plate (6) into shape；Be followed successively by from top to bottom probe (1), feeler lever (2), hammer seat (3), guide rod (4), it is replaceable drop hammer (5) and
Cover plate (6), probe (1), feeler lever (2), hammer seat (3) and guide rod (4) are a non-removable adult, and replaceable drop hammer (5) exist
Free to slide on guide rod (4), cover plate (6) and guide rod (4) are connected through a screw thread；(1) is popped one's head in as high 10mm, the circle that cone angle is 60 °
Cone；The cylindrical body that feeler lever (2) is high 10mm, diameter is 16mm；Hammer the cylindrical body that seat (3) are high 20mm, diameter is 50mm into shape；It leads
The cylindrical body that bar (4) is high 165mm, diameter is 16mm, top 5mm have screw thread；Replaceable drop hammer (5) are that high 60mm, internal diameter are
The annulus of 20mm, overhead gage is high 5mm, outer diameter is round nut that 40mm is matched with guide rod (4) top；It is replaceable to drop hammer
(5) quality is respectively as follows: 148g, 305g, 444g.
2. a kind of dynamic test method for visiting instrument miniature as described in claim 1, includes the following steps:
(1) sample is prepared with die trial, flattens specimen surface, and record specimen height；
(2) according to the soft or hard degree of tested sample, selection is suitably dropped hammer, and is packed into feeler lever for dropping hammer；
(3) nose cone is directed at the soil sample surface to be detected, and ensures that feeler lever is vertical with soil sample surface；
(4) by drop hammer lifting to overhead gage, then loosing one's grip makes free-falling of dropping hammer；
(5) when feeler lever enters sample 20mm, take out feeler lever, and record drop hammer at this time hit number；Test terminates, and arranges instrument and sets
It is standby；
(6) parallel test is carried out；Dynamic detection examination is carried out to the different location of same sample, it is desirable that test gained hits several differences twice
Value is no more than the 5% of the two average value；
(7) finishing analysis test data.
3. the miniature dynamic test method for visiting instrument as claimed in claim 2, which is characterized in that in step (1), die trial internal diameter
152mm, height 170mm, pad thickness 50mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710223332.XA CN107022994B (en) | 2017-04-07 | 2017-04-07 | The miniature dynamic spy instrument of one kind and test method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710223332.XA CN107022994B (en) | 2017-04-07 | 2017-04-07 | The miniature dynamic spy instrument of one kind and test method |
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| Publication Number | Publication Date |
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| CN107022994A CN107022994A (en) | 2017-08-08 |
| CN107022994B true CN107022994B (en) | 2019-10-11 |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107607405A (en) * | 2017-09-06 | 2018-01-19 | 东南大学 | A kind of standard penetrometer and operating method for the test of deep soil loaded deformation |
| CN109667257B (en) * | 2019-03-01 | 2021-01-29 | 四川电力设计咨询有限责任公司 | Portable dynamic sounding tester and testing method |
| CN111879633B (en) * | 2020-06-19 | 2022-09-09 | 东南大学 | Indoor model device for free-fall dynamic sounding test |
| CN114606922B (en) * | 2022-02-28 | 2024-01-23 | 中冶南方城市建设工程技术有限公司 | Portable geotechnical measuring instrument and geotechnical roadbed measuring method |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5427208A (en) * | 1977-08-02 | 1979-03-01 | Chuo Kaihatsu | Automatic recorder of intrusion test that measure quantity of rebound of hammer at same time |
| CN1243900A (en) * | 1998-08-03 | 2000-02-09 | 杨祖文 | Light contact-inspection tester for test slot of foundation |
| CN102012349A (en) * | 2010-11-30 | 2011-04-13 | 华侨大学 | Dynamic sounding device |
-
2017
- 2017-04-07 CN CN201710223332.XA patent/CN107022994B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5427208A (en) * | 1977-08-02 | 1979-03-01 | Chuo Kaihatsu | Automatic recorder of intrusion test that measure quantity of rebound of hammer at same time |
| CN1243900A (en) * | 1998-08-03 | 2000-02-09 | 杨祖文 | Light contact-inspection tester for test slot of foundation |
| CN102012349A (en) * | 2010-11-30 | 2011-04-13 | 华侨大学 | Dynamic sounding device |
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| CN107022994A (en) | 2017-08-08 |
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