CN201170760Y - Machine for formation in solid of hollow cylinder torsional shear instrument remodeling sample - Google Patents

Abstract

The utility model discloses a hollow cylinder torsion shearing apparatus remodeling sample compaction device which comprises two parts of a die and a compaction device. The die comprises a sample base, a sample external die, a sample internal die, an external prolonged cylinder and an internal prolonged cylinder. The sample base is provided with a sample external die and a sample internal die. The upper end of the external sample die is provided with the external prolonged cylinder. The upper end of the internal sample die is provided with the internal prolonged cylinder. The compaction device comprises a leveling ring, a lower force transferring cylinder, an upper force transferring cylinder, a cover plate of the compaction cylinder, a compaction hammer, a guide rod and a positioning device. The lower end of the lower force transferring cylinder is provided with the leveling ring. The upper force transferring cylinder is arranged under the cover plate of the compaction cylinder. The top part of the cover plate of the compaction cylinder is provided with the guide rod which is provided with the compaction hammer. The upper end of the guide rod is provided with the positioning device. The hollow cylinder torsion shearing apparatus remodeling sample compaction device can be used and operated simply and conveniently, save the test time and obtain good effect in producing uniform and standardized remodeling samples. Thus, great help is provided for the remodeling test of the hollow cylinder torsion shearing apparatus.

Description

The hollow cylinder torsional shear apparatus remodeling sample compacting instrument

Technical field

The utility model relates to laboratory tests of soil dynamics equipment, relates in particular to a kind of hollow cylinder torsional shear apparatus remodeling sample compacting instrument.

Background technology

The layering compacting process is the common method that sample is reinvented in preparation in the laboratory soil test, Zhejiang University and Britain GDS company have developed jointly the dynamic hollow cylinder torsional shear instrument of 5Hz, but it is that the long plastics vibrating spear of 5mm is as reinventing the real instrument of hitting of sample that producer only disposes a diameter, as hitting real instrument, have following problem with this sticking plaster when sample preparation: 1) each thick layer by layer being difficult to is controlled; 2) uniformity coefficient of each layer and each layer by layer the flatness of face be difficult to control; 3) can't prepare the big problems such as sample of relative density.

Summary of the invention

The purpose of this utility model provides a kind of hollow cylinder torsional shear apparatus remodeling sample compacting instrument.Can overcome the above problems, finish the sample preparation that the hollow cylinder torsional shear instrument is reinvented sample.

The hollow cylinder torsional shear apparatus remodeling sample compacting instrument comprises mould and ramming device two partly, mould comprises specimen mount, the sample outer mold, the sample inner mold, the outer tube that prolongs, the interior tube that prolongs, on specimen mount, be provided with the sample outer mold, the sample inner mold, sample outer mold upper end is provided with the outer tube that prolongs, in being provided with, sample inner mold upper end prolongs tube, ramming device comprises planarization ring, following power transmission tube, last power transmission tube, the compaction cylinder cover plate, compaction hammer, guide rod, stop, following power transmission tube lower end is provided with planarization ring, compaction cylinder cover plate below is provided with the power transmission tube, compaction cylinder cover plate top is provided with guide rod, guide rod is provided with compaction hammer, and the guide rod upper end is provided with stop.Specimen mount is provided with the circular pickup groove of sample outer mold, sample inner mold.

The main body instrument that the utility model depended on (hollow cylinder torsional shear instrument) is a kind of earthwork test Instrument of tip, at home and abroad all belongs to the advanced product in the quasi-instrument.Yet reinvent the instrument of sample by the making that the hollow cylinder torsional shear instrument is provided,, reinvent sample to uniformly, make the reliability of test findings and accuracy be under suspicion so that be difficult to produce each hitting reality, smashing and be short of to some extent aspect the equality.At this problem, this ramming device is through tight mechanical analysis, at test features, designed reasonable plan: the design of planarization ring, the design of power section, and the inside and outside design that prolongs tube of sample preparation mould.Each design link has rationally effectively utilized mechanics criterion and material behavior, thereby has reached good test effect.In experimental study after this, this ramming device is not only simple and direct in the use, is convenient to operation, has saved test period; More producing the effect that has reached good on the sample of reinventing even, up to standard.Thereby, for the sample test of reinventing of hollow cylinder torsional shear instrument provides great help.

Description of drawings

Accompanying drawing is hollow cylinder torsional shear apparatus remodeling sample compacting instrument and sample preparation mould;

Among the figure: specimen mount 1, sample outer mold 2, sample inner mold 3, soil sample 4, planarization ring 5, down power transmission tube 6, go up power transmission tube 7, outer tube 8, interior prolongations tins 9, compaction cylinder cover plate 10, compaction hammer 11, guide rod, the stop 13 of prolonging.

Embodiment

As shown in drawings, the hollow cylinder torsional shear apparatus remodeling sample compacting instrument comprises mould and ramming device two partly, mould comprises specimen mount 1, sample outer mold 2, sample inner mold 3, the outer tube 8 that prolongs, the interior tube 9 that prolongs, on specimen mount 1, be provided with sample outer mold 2, sample inner mold 3, sample outer mold 2 upper ends are provided with the outer tube 8 that prolongs, in being provided with, sample inner mold 3 upper ends prolong tube 9, ramming device comprises planarization ring 5, following power transmission tube 6, last power transmission tube 7, compaction cylinder cover plate 10, compaction hammer 11, guide rod 12, stop 13, following power transmission tube 6 lower ends are provided with planarization ring 5, compaction cylinder cover plate 10 belows are provided with power transmission tube 7, compaction cylinder cover plate 10 tops are provided with guide rod 12, guide rod 12 is provided with compaction hammer 11, and guide rod 12 upper ends are provided with stop 13.Described specimen mount 1 is provided with the circular pickup groove of sample outer mold 2, sample inner mold 3.

The utility model ramming device divides large and small two sizes, (the full-page proof size: (the sample size: internal diameter * external diameter * height/60 * 100 * 200mm) are corresponding, introduced the design concept (the sample principle is identical with full-page proof) of bulk specimen ramming device here for internal diameter * external diameter * height/160 * 200 * 400mm) and small sample with the hollow cylinder bulk specimen respectively.

The design of planarization ring

The diameter of three samples of standard is 39.1mm, the diameter of planarization ring is 38mm, the gap of reserving about 0.5mm during sample preparation between rubber membrane and the ramming device can make ramming device come in and go out flexibly, and the friction between minimizing and the rubber membrane is avoided rubber membrane to be subjected to ramming device to pull distortion and caused the sample local defect.For hollow cylinder sample compacting device, because of the xsect of its sample is an annular, the shape of planarization ring also must be designed to annular, and the planarization ring Shen is gone into the gap of still respectively leaving 1mm behind the cylindrical cavity between the ring and inside and outside rubber membrane and is convenient to operate.

The design of power section

Ramming device for three experiments of standard, compaction hammer falls along guide rod, and gravitional force is converted into kinetic energy, gives planarization ring to soil sample NE BY ENERGY TRANSFER again, hit real effect to reach leveling, control the real merit of hitting that each hits thereby control height that weight falls by the stop on guide rod top.The material of compaction hammer is that (density is 7.9g/cm to stainless steel ²), quality is 311.2g, and maximum falls apart from 300mm, and the maximum on the unit area is hit real merit and is:

$W_{\mathrm{ave}}=m\&CenterDot;g\&CenterDot;H/\mathrm{\&pi;}{\mathrm{<figure-callout\; id="2"\; label="R\; TS"\; filenames="Y20072030334800071.png"\; state="\{\{state\}\}">R</figure-callout>}}_{\mathrm{TS}}^{}=806.8J/m^2---\left(1\right)$

The utility model guide rod diameter is elected 8mm as, and maximum falls apart from electing 300mm as, and the real merit identical calculations of hitting that falls on unit area by maximum obtains the quality m that the hollow cylinder sample compacting is hammered into shape _HBe 2793g.The diameter of compaction hammer is decided to be 76mm, highly for 80mm; Material adopts stainless steel, and the actual thus compaction hammer quality that obtains is 2835g, can satisfy and hit real requirement.

The design of power transmission tube

For the real merit of hitting of power section is effectively passed to planarization ring, the power transmission tube needs reasonable globality, satisfy the requirement of intensity, distortion and stability, reduce the loss of energy as far as possible, also will satisfy the requirement of using flexibly, being convenient to availabilities such as operating simultaneously.Power transmission tube employing thickness is that the corrosion resistant plate of 3mm bends, is welded, and globality is good.The power transmission tube is divided into two sections, connects with bolt, and wherein epimere can be dismantled as required.Soil amount is lower than two of standard sample height/for the moment in mould, needs two sections connected to use; Two of standard sample height/for the moment, the epimere of can dismantling directly links to each other hypomere with power section, is convenient to personnel operation when the soil amount is higher than, and also helps the steadily of centre of gravity, real to forehand of ramming device.

The inside and outside design that prolongs tube of sample preparation mould

Because of die edge just is the height of sample,, last one deck soil sample hits reality so being in the original mould of can't disposablely packing into when hitting preceding in fact rarefaction.Before the last one deck soil of packing into, mould need be prolonged.The length of prolongation tube is standard according to just holding last one deck soil after the mould prolongation, and rule of thumb a full-page proof prolongation tube effective length is chosen 50mm, and sample prolongation tube is chosen 25mm.Prolong tube should engage with original mould continuously, tight, the integrality of assurance sample; The internal diameter of outer prolongation tube and the internal diameter of former outer mold are consistent, and the external diameter of interior prolongation tube is identical with the external diameter of former inner mold.

Operation steps of the present utility model is as follows

1) takes by weighing required dry soil samples according to the dry density that calculates, soil sample is divided into some parts (being example with five parts) here according to the needs of sample preparation.

2) assemble specimen mount 1, sample outer mold 2, sample inner mold 3, the mould inside and outside wall respectively packages rubber membrane, on the permeable stone of base, put filter paper well, with funnel first part of soil sample 4 evenly bled in the cylindrical cavity, keep funnel to be higher than the soil sample surface with level altitude all the time in the process of bleeding, and at the uniform velocity rotate in first part of soil all bleeds the sample preparation mould along cylindrical cavity.

3) height of sample is 400mm, and the thickness of every part of soil sample is 80mm, and whether mark in advance on the power transmission tube is so that reached predetermined height by upper edge and every layer of soil sample of mark check and correction of mould.

4) it is real earlier with the plastics club ground floor soil sample to be smash flat a little, with planarization ring 5 and following power transmission tube 6, go up power transmission tube 7 and connect, the interior outer of planarization ring is coated talcum powder prevent planarization ring connection rubber membrane.After planarization ring places on the soil sample, check that whether inside and outside rubber membrane still is adjacent to interior outer mold, connects compaction cylinder cover plate 10, compaction hammer 11, guide rod 12, stop 13 again.Zhi Bei sample density is less if desired, needs to adopt the multi-hit inferior way of low distance, and it is real excessive to prevent to hit; It is bigger to prepare density if desired, can adopt bigger falling to attack apart from increasing each reality of hitting of hitting.It is even with the thickness that guarantees this layer soil sample to hit the verticality of noting the maintenance ramming device in the real process.

5) after hitting in fact hair is scraped on the surface of this layer soil,, prevented lamination, hit real second to the 4th layer with same way with the connection of increase interlayer and the integrality of sample integral body.The 4th layer of soil dress finished, and installation earlier is outer to prolong tube 8, interior prolongation tube 9, and then the layer 5 of packing into is native and hit real in the original mould edge.After sample preparation was finished, dismantling prolonged tube and interior outer mold.

Claims (2)

1. hollow cylinder torsional shear apparatus remodeling sample compacting instrument, it is characterized in that comprising mould and ramming device two partly, mould comprises specimen mount (1), sample outer mold (2), sample inner mold (3), the outer tube (8) that prolongs, the interior tube (9) that prolongs, on specimen mount (1), be provided with sample outer mold (2), sample inner mold (3), sample outer mold (2) upper end is provided with the outer tube (8) that prolongs, in being provided with, sample inner mold (3) upper end prolongs tube (9), ramming device comprises planarization ring (5), following power transmission tube (6), last power transmission tube (7), compaction cylinder cover plate (10), compaction hammer (11), guide rod (12), stop (13), following power transmission tube (6) lower end is provided with planarization ring (5), compaction cylinder cover plate (10) below is provided with power transmission tube (7), compaction cylinder cover plate (10) top is provided with guide rod (12), guide rod (12) is provided with compaction hammer (11), and guide rod (12) upper end is provided with stop (13).

2. a kind of hollow cylinder torsional shear apparatus remodeling sample compacting instrument according to claim 1 is characterized in that described specimen mount (1) is provided with the circular pickup groove of sample outer mold (2), sample inner mold (3).

Images