CN101441149B - Sample preparing machine and method of soil body rapid triaxial test - Google Patents
Sample preparing machine and method of soil body rapid triaxial test Download PDFInfo
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- CN101441149B CN101441149B CN2008102439770A CN200810243977A CN101441149B CN 101441149 B CN101441149 B CN 101441149B CN 2008102439770 A CN2008102439770 A CN 2008102439770A CN 200810243977 A CN200810243977 A CN 200810243977A CN 101441149 B CN101441149 B CN 101441149B
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- Investigation Of Foundation Soil And Reinforcement Of Foundation Soil By Compacting Or Drainage (AREA)
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Abstract
The invention relates to a sample-making device for soil quick triaxial test and a sample-making method thereof. The sample-making device comprises a sample-beating cylinder and a sample-beating device, wherein the sample-beating cylinder comprises a base, a three-section mould, a lower clamp, an upper clamp and a protective cylinder; the sample-beating device comprises a power transmission plate, a compact hammer, a guide bar, a stopper; the base of the sample-beating cylinder is a double-faced base with one face of the central part of the base is a circular fixed groove, the other face of which is a circular fixed groove with a circular hole at the center; the three-section mould is composed of three circular-arc metal sheets with a central angle of 120 DEG. The sample-making method comprises: fixing the guide bar on the base, laminatedly compacting the soil according to the required dry density, sealing the central hole of the base with clay after being compacted, laminatedly pouring sands into the central cylinder hole and compacting the soil according to the required density, finally sealing the upper hole of the cylinder hole with clay. The invention has simple use, convenient operation, testing time saving, good effect for making uniform, standard sand-core cylinder, can be popularized in the field of soil test technique.
Description
Technical field
What the present invention relates to is the sample preparation device and the method for making sample thereof of the test of soil body rapid triaxial, belongs to the soil test technique field.
Background technology
For cohesive soil, mix the triaxial consolidation shearing test of gravel clay, because the cohesive soil infiltration coefficient is very low, draining is extremely slow, test method is finished in one three (the consolidation draining scissor test of diameter of phi=101mm) is often needed to surpass 7 days time routinely, and for big three (diameter of phi=300mm), a test even need nearly one-month period is finished the time that one group (4～5 tests) needs some months, utmost point spended time.
In order to solve the long problem of above-mentioned test period, adopted a kind of rapid triaxial shearing test method, this method employing center is provided with the cylindrical sample (being called the sand-core cylinder sample) of the cylindrical core that is formed by the sand grains filling and tests, make that the sample draining is carried out fast, pore water pressure is able to rapid dissipation, efficiently solve the long problem of normal triaxial consolidation shearing test test period.
Yet the used sand-core cylinder sample of rapid triaxial test does not have ready-made sample preparation device, and the standard sample preparation device of existing cylindrical sample can not be directly used in makes the sand-core cylinder sample, therefore, needs the sample preparation device of redesign and configuration sand-core cylinder sample; Simultaneously, because sand-core cylinder sample and conventional cylinder sample are cylindrical, its height, diameter dimension are all consistent, the sample preparation device of sand-core cylinder sample has many parts and cylinder sample sample preparation device to use mutually, therefore, also should consider its versatility to cause the wasting of resources during sample preparation device of design sand-core cylinder sample to avoid repeated configuration to the cylinder sample.In addition, the sand-core cylinder sample since admixture the core cylinder, during sample preparation routinely method for making sample carry out, need research to be applicable to the method for making sample of sand-core cylinder sample.
Summary of the invention
The objective of the invention is to propose a sample preparation device and the method for making sample thereof that to make the sand-core cylinder sample, solve the sample preparation problem of above-mentioned sand-core cylinder sample, this sample preparation device can be applicable to make cylindrical sample, avoid repeated configuration, saved resource.
The sample preparation device of soil body rapid triaxial test comprises and hits the sample tube and hit sample device two parts.Hit the sample tube and comprise base, three-part pattern, lower clamp, upper clamp and casing; Hit sample tube base and be provided with three-part pattern, the three-part pattern outside has lower clamp that base and three-part pattern are fixed together, and three-part pattern is fixed by upper clamp.Hit the sample device and comprise force transmitting board, compaction hammer, guide rod, stop; Guide rod is provided with compaction hammer, and the guide rod upper end is provided with stop.Hitting sample tube base is two-sided base, and its edge is two-sided all the screw-type circular hole, and the base middle part is the circular fixed groove of center band circular hole for circular fixed groove, another side simultaneously.Three-part pattern is 120 ° circular arc sheet metal by three central angles and forms.Lower clamp is an annular, and its edge has circular hole, can be fixed together with key screw base and three-part pattern by lower clamp; Upper clamp is a clamshell type, and two strip terminals place are with holes and connect with screw.Force transmitting board has two kinds, and a kind of is the sheet metal of the threaded circular hole of end face, another kind of sheet metal for the centre perforation.Guide rod is cylindrical straight-bar, and end is threaded, the other end does not have screw thread but the cross section is less, and guide rod can be fixed together with the hammer power transmission base plate of the threaded circular hole of end face or the base of center band circular hole.
During the sample preparation of sand-core cylinder sample earlier with guide rod (the guide rod diameter should less than specimen finish 1/5) be fixed on and hit on the sample tube base, toward hit in the sample tube by part pour into the soil body and on request dry density carry out layering and hit reality, afterwards, take out guide rod, fill up the base center hole with clay, (the sand grains composition should be fine sand～coarse sand to pour sand grains into toward the layering of sample center cylindrical hole, particle diameter 0.075mm～2mm), and density (should less than soil body dry density) tamping on request are after sand grains fills and finishes, seal aperture, cylindrical hole top with clay, at this moment, that has finished the sand-core cylinder sample hits the sample step, afterwards, progressively remove and hit the sample device and hit the sample tube, promptly obtain the sand-core cylinder sample.
The present invention has at first solved the sample preparation device problem of sand-core cylinder sample, makes the sample preparation device can be applicable to the making of conventional cylinder sample simultaneously, has avoided the repeated configuration of a plurality of same parts of different sample preparation devices, has effectively saved resource; Simultaneously, the invention allows for the method for making sample of sand-core cylinder sample, solved the sample making technology problem of sand-core cylinder sample.This sample preparation device and method for making sample thereof not only use simple and direct, easy to operate, have saved test period, have more reached good effect producing on the sand-core cylinder sample even, up to standard.
Description of drawings
Accompanying drawing 1 is that the master of the sample preparation device of soil body rapid triaxial test looks diagrammatic cross-section.Among the figure, 1 hits sample tube base, 2 three-part patterns, 3 lower clamp, 4 upper clamp, 5 casings, 6 hits sample device force transmitting board, 7 compaction hammers, 8 guide rods, 9 stops, 10 fixed screws.
Accompanying drawing 2 is by the sand-core cylinder shape sample synoptic diagram after the sample preparation of the present invention.Among the figure, 1 cylindrical core, 2 soil bodys to be tested.
Embodiment
As shown in Figure 1, the sample preparation device of soil body rapid triaxial test comprises and hits the sample tube and hit sample device two parts.Hit the sample tube and comprise base 1, three-part pattern 2, lower clamp 3, upper clamp 4 and casing 5; Hit sample tube base 1 and be provided with three-part pattern 2, three-part pattern 2 outsides have lower clamp 3 that base 1 and three-part pattern 2 are fixed together, three-part pattern 2 by upper clamp 4 with its clamping.Hit the sample device and comprise force transmitting board 6, compaction hammer 7, guide rod 8, stop 9; Guide rod 8 is provided with compaction hammer 7, and guide rod 8 upper ends are provided with stop 9.Hit sample tube base 1 and be two-sided base, its edge is two-sided all the screw-type circular hole, and the base middle part simultaneously be circular fixed groove, uses when making the cylinder sample of routine, and another side is the circular fixed groove of center band circular hole, is used to make the sand-core cylinder sample.Three-part pattern 2 is 120 ° circular arc sheet metal by three central angles and forms.Lower clamp 3 is an annular, and its edge has circular hole, base 1 and anchor clamps 3 is fixed together with screw 10 by lower clamp; Upper clamp 4 is a clamshell type, and two strip terminals place are with holes and connect with screw; Anchor clamps 3 and anchor clamps 4 are used for fixing test specimen tube, prevent that test specimen tube is loosening, so that make highdensity sample.Hit sample device part, force transmitting board 6 has two kinds, and a kind of is the sheet metal of the threaded circular hole of end face, is used to make conventional cylinder sample, and another kind of sheet metal for the centre perforation is used to make the sand-core cylinder sample.Guide rod 8 is cylindrical straight-bar, end is threaded, the other end does not have screw thread but the cross section is less, can be fixed together with the hammer force transmitting board 6 of the threaded circular hole of end face or the base 1 of center band circular hole, there is stop 9 the guide rod upper end, there are several spacing holes guide rod 8 upper ends, and the position of stop 9 can be set as required.
To make the sand-core cylinder sample is example, contrast accompanying drawing 1, and the operation steps during sample preparation is as follows: (1) respectively is divided into 5～8 parts according to testing requirements waiting to test the soil body and sand grains.(2) install hitting the sample tube, promptly three-part pattern 2 is placed on the test specimen tube base 1 and (one of base band circular hole is faced up), put lower clamp 3 in three-part pattern 2 outsides, and base 1 and lower clamp 3 are fixed together with screw 10, load onto upper clamp 4, guide rod 8 (the guide rod diameter should less than hit sample tube diameter 1/5) a threadless end plug advances in the circular hole of base 1, guide rod 8 is fixed on the base 1.(3) pour first part of soil body in the sample tube into toward hitting, be inserted in compaction hammer 7 and load onto stop 9 on guide rod 8, dry density is hit reality to the soil body as requested, after having hit, with scraper soil body surface is scraped hair, carries out the reality of hitting of second part of soil body; Carry out successively, hit reality when a soil body (make last need put casing 5) at three-part pattern 2 tops up to what finish the last a soil body.(4) take out guide rod 8, fill up base 1 center hole with clay, (the sand grains composition should be fine sand～coarse sand to pour sand grains into toward the layering of sample center cylindrical hole, particle diameter 0.075mm～2mm), and density (should less than soil body dry density) tamping on request, after sand grains fills and finishes, seal aperture, cylindrical hole top with clay.(5) dismounting is hit the sample device and is hit the sample tube successively, promptly obtains needed sand-core cylinder sample.
Claims (3)
1. the sample preparation device of soil body rapid triaxial test, it is characterized in that: the sample preparation device comprises and hits the sample tube and hit sample device two parts, hit the sample tube and comprise base (1), three-part pattern (2), lower clamp (3), upper clamp (4) and casing (5), hit sample tube base (1) and be provided with three-part pattern (2), three-part pattern (2) outside has lower clamp (3) that base (1) and three-part pattern (2) are fixed together, three-part pattern (2) top by upper clamp (4) with its clamping; Hit the sample device and comprise force transmitting board (6), compaction hammer (7), guide rod (8), stop (9), guide rod (8) is provided with compaction hammer (7), guide rod (8) upper end is provided with stop (9), the described sample tube base (1) that hits is two-sided base, its edge is two-sided all the screw-type circular hole, and the base middle part is the circular fixed groove of center band circular hole for circular fixed groove, another side simultaneously; Described lower clamp (3) is an annular, and its edge has circular hole, is fixed together with key screw base and lower clamp (3) by lower clamp (3); Upper clamp (4) is a clamshell type, and two strip terminals place are with holes and connect with screw; Described force transmitting board (6) has two kinds, and a kind of is the sheet metal of the threaded circular hole of end face, another kind of sheet metal for the centre perforation; Described guide rod (8) is cylindrical straight-bar, and end is threaded, the other end does not have screw thread but the cross section is less, and guide rod (8) can be fixed together with the force transmitting board of the threaded circular hole of end face or the base of center band circular hole.
2. the sample preparation device of soil body rapid triaxial according to claim 1 test is characterized in that: three-part pattern (2) is 120 ° circular arc sheet metal by three central angles and forms.
3. the method for making sample of the sample preparation device of soil body rapid triaxial test as claimed in claim 1, it is characterized in that: earlier diameter is fixed on less than 1/5 the guide rod (8) that hits sample tube diameter during sample preparation and hits on the sample tube base (1), toward hit in the sample tube by part pour into the soil body and on request dry density carry out layering and hit reality, afterwards, take out guide rod (8), fill up base (1) center hole with clay, pour sand grains into toward the layering of sample center cylindrical hole, and by density tamping less than soil body dry density, after sand grains fills and finishes, seal aperture, cylindrical hole top with clay.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN2008102439770A CN101441149B (en) | 2008-12-19 | 2008-12-19 | Sample preparing machine and method of soil body rapid triaxial test |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2008102439770A CN101441149B (en) | 2008-12-19 | 2008-12-19 | Sample preparing machine and method of soil body rapid triaxial test |
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| CN101441149A CN101441149A (en) | 2009-05-27 |
| CN101441149B true CN101441149B (en) | 2011-01-19 |
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| CN2008102439770A Expired - Fee Related CN101441149B (en) | 2008-12-19 | 2008-12-19 | Sample preparing machine and method of soil body rapid triaxial test |
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