CN202383028U - Assembled variable-size direct shear compressometer - Google Patents

Assembled variable-size direct shear compressometer Download PDF

Info

Publication number
CN202383028U
CN202383028U CN2011205157538U CN201120515753U CN202383028U CN 202383028 U CN202383028 U CN 202383028U CN 2011205157538 U CN2011205157538 U CN 2011205157538U CN 201120515753 U CN201120515753 U CN 201120515753U CN 202383028 U CN202383028 U CN 202383028U
Authority
CN
China
Prior art keywords
box
sample
dress appearance
sample box
ring
Prior art date
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.)
Withdrawn - After Issue
Application number
CN2011205157538U
Other languages
Chinese (zh)
Inventor
符文熹
郑星
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Sichuan University
Original Assignee
Sichuan University
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Sichuan University filed Critical Sichuan University
Priority to CN2011205157538U priority Critical patent/CN202383028U/en
Application granted granted Critical
Publication of CN202383028U publication Critical patent/CN202383028U/en
Withdrawn - After Issue legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Abstract

The utility model discloses an assembled variable-size direct shear compressometer for carrying out shearing tests and compression tests of various variable-size geotechnical samples. An upper shearing box and a lower shearing box of an apparatus main body adopt an assembled variable-size sample box element composed of at least two suits of sample box rigid components in laminated connection; each suit of sample box rigid component comprises a plurality of nested sampling rings; the sampling ring at the inner side is axially limited in one direction by the sampling ring at the outer side; the rigid components for respectively forming the upper shearing box and the lower shearing box are anchored together; a rolling support matching structure is arranged on the sampling ring at the outer side of one suit of rigid component in the upper shearing box and the lower shearing box, and a drainage channel is arranged on each sampling ring located at the bottom part of the lower shearing box. A drainage function can be closed according to test requirements. The direct shearing tests and compression tests of a soil sample and a soft rock, direct shearing tests of a rock joint and in-situ direct shearing tests of a soil body and the soft rock can be carried out. The apparatus is simple in operation, convenient to maintain, convenient to dismantle and assemble and good in environmental adaptability.

Description

Assembly type becomes size staight scissors compressometer
Technical field
The utility model relates to a kind of test unit, is mainly used in to carry out indoor or open-air rock soil mass staight scissors compression test.
Background technology
In the Geotechnical Engineering field, the mechanics parameter index of obtaining rock soil mass in the target engineering zone through the test approach that usually is absolutely necessary.Mainly draw the intensity index of rock soil mass at present through shop experiment.Shop experiment comprises large and small triaxial test, direct shear test, compression test etc.Indoor direct shear test comprises standard cutting ring staight scissors and large-sized square box staight scissors.These tests all are under the fixing sample size, sample to be sheared or compressed, and can not realize the variation on the specimen size.
At present; Also relatively lack the instrument and equipment that can carry out direct shear test in the open air, such as the open-air original position direct shear apparatus that utilizes lever principle, lateral pressure applies with counterweight; Horizontal thrust applies with manpower; The counter-force that can provide is all less, especially lacks to possess soil body sample to be become size combinations is sheared and the function of compression, and can also carry out the instrument and equipment of compression test of shearing and the rock of soft rock.
In order to study the shearing strength relation of same rock soil mass sample when the change in size; And the realization soil body, soft rock shearing and hard rock compression test is comprehensive; The size effect Changing Pattern of soil body mechanical characteristic can be studied and test can be carried out in the open air; Suddenly wait to develop the shearing compressometer that a cover function is complete, the scope of application is wider, require this instrument have the counter-force of applying greatly, volume is less, weight is lighter, the laying out apparatus of test has size variable property; The characteristics of disassembly and assembly are carried out the shear test of different size (comprising different ratio of height to diameters and different aspect ratios) ground sample thereby be easy to carry to the field easily.
The utility model content
In order to overcome the deficiency that existing direct shear apparatus only is applicable to the fixed measure sample; The utility model technical matters to be solved provides a kind of assembly type and becomes size staight scissors compressometer; This instrument can carry out the direct shear test and the compression test of soil sample and soft rock, and the direct shear test of rock joint.
The utility model solves the technical scheme that its technical matters adopted: assembly type becomes size staight scissors compressometer; Comprise reaction frame, sample box and be connected with reaction frame and be arranged on horizontal charger, the vertical loading device between reaction frame and the sample box; Said sample box comprise shear box, down cut box and be arranged on shear box and the down cut box between rolling support; Said upward shear box, down cut box all adopt assembly type to become size sample box external member; Said assembly type becomes size sample box external member and is made up of the sample box stiff member that at least two covers can mutual range upon range of connection; Every suit sample box stiff member comprises at least two mutually nested dress appearance rings; In each adjacent two dress appearance ring, the outer rim that is positioned at inboard dress appearance ring fits with the inner edge of the dress appearance ring that is positioned at the outside, is positioned at dress appearance annulate shaft that inboard dress appearance ring is positioned at the outside to unidirectional spacing; Outermost dress appearance ring being provided with rolling support matching structure in the wherein cover sample box stiff member of composition assembly type change size sample box external member.
In said each adjacent two dress appearance ring, be positioned at inboard dress appearance ring outer rim and be provided with positioning spigot, the dress appearance ring inner edge that is positioned at the outside is provided with and the corresponding locating slot of corresponding positioning spigot.
Described sample box stiff member also comprises one group of part of filling up with locating slot coupling.
The positioning spigot and/or the locating slot of said each dress appearance ring have four, and the layout that is centrosymmetric.
All offer rhone on each dress appearance ring of a said wherein cover sample box stiff member; When each dress appearance ring is nested with setting means; Rhone on each dress appearance ring is formed groove, otherwise wherein has at least two rhones on the adjacent dress appearance ring to stagger each other.
The said outer rim that is provided with the dress appearance ring of the support matching structure that rolls is square, and outer rim is provided with two fixedly ears.
Said compressometer also comprises one group of force transmitting board, each the piece plate in this group force transmitting board respectively with the sample box stiff member in the inner edges of different dress appearance rings be complementary, the center of force transmitting board is provided with the counterbore with vertical loading device coupling.
Said force transmitting board is the porous disc that is laid with permeable hole.
Said reaction frame comprises the column of base plate, vertical reaction plate, horizontal reacting force post and four rectangular distribution; Column and horizontal reacting force post are screw mandrel; Base plate is parallel to each other with vertical reaction plate and is vertical with each column and be fixed on each column through nut; The horizontal reacting force seat that on the horizontal reacting force post, has been threaded, the stiff end of horizontal charger contacts with the horizontal reacting force seat.
The beneficial effect of the utility model is: can realize that rock, soil sample become the combination staight scissors and the compression test of diameter, degree of uprising, lighter weight, be easy to carry that disassembly and assembly are convenient, be applicable to and indoorly carry out rock soil mass with the field and shear compression test; Instrument is convenient to safeguard, the parts handling ease, have good environmental adaptability, simple to operate, cost is low, general personnel through instructing the characteristics that just can operate, are suitable for promoting the use of in the on-the-spot in the open air original state ground staight scissors compression test slightly.
Description of drawings
Fig. 1 is the agent structure synoptic diagram that the assembly type of the utility model becomes size staight scissors compressometer.
Fig. 2 is the synoptic diagram of sample box stiff member (with drainage channels).
Fig. 3 is the vertical view of Fig. 2.
Fig. 4 is the synoptic diagram of general sample box stiff member.
Fig. 5 is the vertical view of Fig. 4.
Fig. 6 is the front view of one of them dress appearance ring of sample box stiff member among Fig. 4.
Fig. 7 is the A-A cut-open view of Fig. 6.
Fig. 8 is the B-B cut-open view of Fig. 6.
Fig. 9 is the front view of one of them dress appearance ring of sample box stiff member among Fig. 4.
Figure 10 is the front view of one of them dress appearance ring of sample box stiff member among Fig. 4.
Figure 11 is the synoptic diagram of outermost dress appearance ring (band ball grooves).
Figure 12 is the C-C cut-open view of Figure 11.
Figure 13 is the synoptic diagram of force transmitting board (being provided with permeable hole).
Figure 14 is the synoptic diagram of force transmitting board (no permeable hole).
Figure 15 is an enlarged diagram of filling up part.
Be labeled as 1-reaction frame, the horizontal charger of 2-, 3-vertical loading device, 4-shear box, the last shear box of 41-among the figure; The support of rolling of 42-down cut box, 43-rigidity shear layer, 5-, 6 force transmitting boards, 11-base plate, 12 columns; The vertical reaction plate of 13-, 14-horizontal reacting force post, 15-horizontal reacting force seat, 16-nut, 17-vertical loading device roll and support the 18-steel plate; 40-sample box stiff member, 61-counterbore, 62-permeable hole, 400-dress appearance ring, the outermost dress appearance of 401-ring, 402-positioning spigot; The 403-locating slot, 404-fills up part, the 405-ball grooves, the 406-rhone, 407-is ear fixedly, the 408-bolt hole.
Embodiment
Below in conjunction with accompanying drawing and embodiment the utility model is further specified.
Like Fig. 1~shown in Figure 15; The assembly type of the utility model becomes that size staight scissors compressometer comprises reaction frame 1, sample box 4 and is connected with reaction frame 1 and is arranged on horizontal charger 2, the vertical loading device 3 between reaction frame 1 and the sample box 4; Said sample box 4 comprise shear box 41, down cut box 42 and be arranged on shear box 41 and down cut box 42 between rolling support 5; Said upward shear box 41, down cut box 42 all adopt assembly type to become size sample box external member; Said assembly type becomes size sample box external member and is made up of the sample box stiff member 40 that at least two covers can mutual range upon range of connection; Every suit sample box stiff member 40 comprises at least two mutually nested dress appearance rings 400; In each adjacent two dress appearance ring 400, the outer rim that is positioned at inboard dress appearance ring 400 fits with the inner edge of the dress appearance ring 400 that is positioned at the outside, and being positioned at inboard dress appearance ring 400, to be positioned at the dress appearance ring 400 in the outside axially unidirectional spacing; After outermost dress appearance ring 401 was mutually permanently connected, inboard dress appearance ring 400 spacingly also was fixed because of should be axial unidirectional simultaneously; Outermost dress appearance ring 401 is provided with rolling support matching structure in the wherein cover sample box stiff member 40 of composition assembly type change size sample box external member.
Last shear box 41, down cut box 42 all adopt assembly type to become size sample box external member; Said assembly type becomes size sample box external member and is made up of the sample box stiff member 40 that at least two covers can mutual range upon range of connection; Be for the ground test specification in the requirement of sample ratio of height to diameter adapt; Each dress appearance ring 400 in the sample box stiff member 40 has identical thickness; The sample box stiff member 40 that respectively overlaps of forming same set of assembly type change size sample box external member also has identical thickness, and when sample box stiff member 40 the most inboard dress appearance rings 400 varied in size, the cross-sectional area of its inner chamber is corresponding to change; The number of plies of the sample box stiff member 40 of the range upon range of connection that assembly type change size sample box external member is comprised also can correspondingly adjust; Be the sectional area of laying out apparatus and highly all can adjust variation, the sample box 4 and the sample of different size are complementary, thereby same staight scissors compressometer is used for the shear test of different size sample.
Obviously; Consider placement location and convenient fixing after each assembly type becomes the assembling of size sample box external member; In the sample box stiff member 40; End face when the rolling of a cover sample box stiff member 40 is wherein supported matching structure and is arranged on each dress appearance ring 400 and can mutually nestedly supports; And the bottom surface of the rolling of another set of sample box stiff member 40 when supporting matching structure and being arranged on each dress appearance ring 400 and can mutually nestedly supporting, the end face of the upwards inboard dress appearance of the end face of the upwards inboard dress appearance of alleged end face spindle ring 400 not limited sides, alleged bottom surface spindle ring 400 limited sides.
From testing requirements; Usually upward shear box 41, down cut box 42 each sample box stiff member 40 by identical tricks constitute; To guarantee that shear surface is positioned at the sample center; And last shear box 41, down cut box 42 those relative one decks should use outermost dress appearance ring 401 to be provided with to roll and support that cover sample box stiff member 40 of matching structure, with convenient install to roll support 5.In addition, requiring to adorn in each layer appearance ring 400 usually has higher right alignment, with the warranty test precision.
The intracavity section shape of dress appearance ring 400 is generally circular or square according to test needs, but keeps circular sectional area to equate with square sectional area, with the variation of the investigation sample cross sectional shape influence to test findings.Be preferably each compressometer and be equipped with circular hole sample box stiff member and each some cover of square hole sample box stiff member.When the assembly type of the utility model becomes size staight scissors compressometer and is used for soil sample with the experiment of soft rock uniaxial compression, only use down cut box 42 and need not go up shear box 41, this moment can be through the height of interpolation sample box stiff member 40 corresponding increase down cut boxes 42.Its method of application is: sample is put into down cut box 42, put lastblock force transmitting board 6 at the sample top, the vertical loading device forces on the force transmitting board 6 and destroys up to sample.Because down cut box 42 adopts assembly type to become size sample box external member, same reason can be used for same staight scissors compressometer the uniaxial compression test of different size sample.
Like Fig. 4~shown in Figure 10; Because all connect during range upon range of installation through outermost each dress appearance ring 401; Therefore in each adjacent two dress appearance ring 400; The dress appearance that is positioned at the inboard is encircled 400 outer rims and is provided with positioning spigot 402, and the dress appearance that is positioned at the outside is encircled 400 inner edges and is provided with and corresponding positioning spigot 402 corresponding locating slots 403, encircles a requirement on machining accuracy of 400 to reduce dress appearance; Guarantee the right alignment of each dress appearance ring in the sample box stiff member 40, and then avoid levels that sample eccentric so that pack into takes place between the dress appearance ring 400 of same radial position and do not satisfy testing requirements.No matter adorn appearance ring 400 and be annulus or Fang Huan, positioning spigot 402 and locating slot 403 preferably all are set.
Like Fig. 4~Figure 10 and shown in Figure 15; At this moment; For the complete Pass Test requirement of the sample that guarantees to pack into; Improve test accuracy, described sample box stiff member 40 also comprise one group with locating slot 403 couplings fill up part 404, should adopt equal number and shape and big or small also identical locating slot 403 on said each cavity ring.
As shown in Figures 2 and 3; In order to realize draining shearing or undrained shear; Can all offer rhone 406 on each dress appearance ring 400 with a said wherein cover sample box stiff member 40, when each dress appearance ring 400 was nested with setting means, each rhone 406 was interconnected; Shear to be used for draining; With the alternate manner beyond the setting means when nested, the rhone 406 at least two adjacent dress appearance rings 400 is staggered each other, just can make rhone 406 seal as long as there is wherein rhone 406 on two adjacent dress appearance rings 400 stagger each other.If in the time of need doing the undrained shear test of full-size sample, the sample box stiff member 40 that any one deck is not provided with rhone places the bottommost of down cut box 42 to get final product.
Like Fig. 4~shown in Figure 10, the positioning spigot 402 and/or the locating slot 403 of preferred said each dress appearance ring 400 have four, and layouts that be centrosymmetric, and the dress appearance of symmetrical structure is encircled 400 and helped improving packaging efficiency, and has made things convenient for the setting of rhone 406.At this moment, the quantity of filling up part 404 of corresponding every cover sample box stiff member 40 also is four, and at this moment, two mutual out of plumb of straight line at place can realize that draining and undrained shear can shared same set of sample box stiff members 40 when designing and arranging tank 406 was communicated with.
It should be noted that; That cover sample box stiff member 40 that is provided with rhone 406 should not be to be provided with to roll to support that cover sample box stiff member 40 of matching structure; To improve versatility; Because that cover sample box stiff member 40 that is provided with rhone 406 must be positioned at the bottom of down cut box 42, and the face at rhone 406 places is positioned at bottommost.The horizontal charger 2 of staight scissors compressometer is the last shear box 41 that acts in the sample box 4.Horizontal for ease charger 2 acts on sample box 4, and the said outer rim that is provided with the dress appearance ring 401 of the support matching structure that rolls is square, and outer rim is provided with two fixedly ears 407; Up and down corresponding two groups fixedly insert register pin in the ear 407; Two groups of sample box stiff members 40 to belonging to shear box 41, down cut box 42 carry out radial location, guarantee right alignment, guarantee that specimen size satisfies testing requirements; Improve test accuracy, after dress appearance finishes the register pin extraction is got final product.
For convenient will constitute assembly type change size sample box external member respectively overlap the 40 range upon range of connections of sample box stiff member; Can, each process pin-and-hole or bolt hole 408 on overlapping the outermost dress appearance ring 400 of sample box stiff member 40; Connect the range upon range of sample box stiff member 40 that respectively overlaps through pin or bolt, it should be noted that being provided with rolls this moment and support that pin-and-hole or the bolt hole 408 on that cover sample box stiff member 40 of matching structure should be processed as blind hole.
For making things convenient for vertical loading device 3 positive pressure in sample; Said compressometer also comprises one group of force transmitting board 6; Each piece plate in this group force transmitting board 6 is complementary with the inner edge that each adorns appearance ring 400 respectively, and the center of force transmitting board 6 is provided with the counterbore 61 with vertical loading device 3 couplings.
When needs were used for the draining shearing, said force transmitting board 6 was for being laid with the porous disc of permeable hole 62.In the practice, preferably respectively dispose one group of waterproof steel plate and permeable steel plate as force transmitting board 6.
For eliminating between the upper and lower shear box sliding friction to the influence of test findings; Need between upper and lower shear box facing surfaces, be provided with rolls supports 5; The 5 general steel balls that adopt are supported in said rolling; Therefore, it is parallel and with respect to the symmetrically arranged ball grooves 405 in center of dress appearance ring 400 that said and the structure that roll to support 5 couplings are generally two row.
Shear test usually requires xsect with the sample middle as shear surface, when laying out apparatus can be adjusted, obviously; Need the relative position between laying out apparatus and the horizontal charger 2 be adjusted accordingly; At this moment, can adjust through below laying out apparatus, adding the mode of adjusting cushion block, the mode of vertical height that also can be through adjusting horizontal charger 2 is adjusted; In order to alleviate the weight of equipment set; A kind of mode is adjusted after preferred, and as shown in Figure 1, said reaction frame 1 comprises the column 12 of base plate 11, vertical reaction plate 13, horizontal reacting force post 14 and four rectangular distribution; Column 12 is screw mandrel with horizontal reacting force post 14; Base plate 11 is parallel to each other with vertical reaction plate 13 and is vertical with each column 12 and be fixed on each column 12 through nut 16, the horizontal reacting force seat 15 that on horizontal reacting force post 14, has been threaded, and the stiff end of horizontal charger 2 contacts with horizontal reacting force seat 15.
Need to prove; Except that reaction frame 1, horizontal charger 2, vertical loading device 3 etc.; The requisite ingredient of boxshear apparatus or compressometer also comprises data acquisition and recording system, and in these areas, the assembly type of the utility model becomes size staight scissors compressometer can be with reference to using prior art; The main improvement of the utility model is sample box 4, and sample box 4 also is called as laying out apparatus sometimes.
Embodiment:
Like Fig. 1~shown in Figure 15; The assembly type of the utility model becomes size staight scissors compressometer; It has comprised the standard size of laboratory direct shear test; After being provided with shear surface artificially, can apply several grades vertical loads to the soil body and soft rock sample and shear or compression test, also can carry out shear test to rock mass discontinuity.
At first utilize the steel plate of 2.5cm thickness, make to be numbered 1.~8. eight cover sample box stiff members 40, the thickness that promptly is used to constitute the sample box stiff member 40 of going up shear box 41, down cut box 42 is 2.5cm; Every cover sample box stiff member 40 is made up of four concentric steel loops, and wherein outermost one deck steel loop outer rim is a square, length of side 27cm; Inner to be the center of circle drawn diameter is thereby that the cylinder of 20cm forms a cavity ring one with its centre of form; Cavity ring one is provided with bolt hole 408, and then is the cavity ring two of an external diameter 20cm, internal diameter 15cm, and institute is nested by square steel loop; Then this encircles the cavity ring three of a nested external diameter 15cm, internal diameter 10cm; The cavity ring four of three nested external diameter 10cm of cavity ring, internal diameter diameter 6.18cm is for realizing the axial unidirectional spacing of each ring, so that fixing each dress appearance ring; Avoid the contraposition that relatively moves and make things convenient for rhone in shear history between each ring; Each ring is gone up relative set positioning spigot 402 and locating slot 403, and locating slot 403 is located on the end face, thereby realizes that relative positioning is unidirectional spacing with axially.In addition, make respectively one group of permeable and fluid-tight force transmitting board 6, every group of force transmitting board 6 has four blocks of plates, is plectane, and diameter is respectively 20cm, 15cm, 10cm, 6.18cm.
If the dress appearance of each cover sample box stiff member 40 is encircled 400 intracavity sections and is shaped as square; " returning " shape ring that then corresponding cavity ring one is outer rim length of side 27cm, inner edge length of side 17.72cm; Cavity ring two is " returning " shape ring of outer rim length of side 17.72cm, inner edge length of side 13.29cm; Cavity ring three is " returning " shape ring of outer rim length of side 13.29cm, inner edge length of side 8.86cm; Cavity ring four is " returning " shape ring of outer rim length of side 8.86cm, inner edge length of side 5.475cm; The sectional area of sectional area and right cylinder sample that is the square sample is suitable, and corresponding permeable or fluid-tight force transmitting board 6 is a square plate, and the length of side is respectively 17.72cm, 13.29cm, 8.86cm, 5.475cm.
Sample box stiff member 40 realizes that through nested mode the radial dimension of sample changes; Each dress appearance ring 400 can mutually nested support and interconnecting and fixing by outermost layer dress appearance ring 401; When using normal inner diameter to contact with sample as other dress appearance ring beyond the dress appearance ring of 6.18cm; Correspondingly in each locating slot 403 of the most inboard cavity ring of contact sample fill up,, thereby guarantee that specimen size is accurate in order to avoid sample is clamp-oned in the locating slot 403 during dress appearance to fill up part 404.
Some sample box stiff member 40 local structure is slightly different:
The cavity ring one that is numbered sample box stiff member 40 4. is provided with the fixedly ear 407 of symmetry, and is provided with ball grooves 405 in its bottom surface;
The cavity ring one that is numbered sample box stiff member 40 5. is provided with the fixedly ear 407 of symmetry, and is provided with ball grooves 405 at its end face;
Each cavity ring bottom surface that is numbered sample box stiff member 40 8. is carved with four rhones 406 symmetrically.When the rhone 406 rotation alignment of four cavity ring of this layer, sample can realize that the bottom surface draining shears; After any ring was rotary shifted, drainage channel was closed, and sample is realized undrained shear.
Be numbered 1., 2., 3., shear box 41 in 4. the sample box stiff member 40 range upon range of fixedly formation, be numbered 5., 6., 7., the 40 range upon range of fixedly formation down cut boxes 42 of sample box stiff member 8..
Four angle points and the four limit mid points of the cavity ring one of every layer of sample box stiff member 40 all are drilled with bolt hole 408, realize sample variation in height thereby can be easily with the bolt of certain-length the sample box stiff member 40 of certain tricks be fixed together.
For realizing moving of vertical loading device 3 in the vertical directions; Four root posts 12 on the reaction frame 1 adopt four rhizoid bars; It is fixing that itself and vertical reaction plate 13, base plate 11 1 are reinstated nut 16, can realize the location of vertical reaction plate 13 at column 12 arbitrary height places like this.
Like Fig. 1~shown in Figure 15; The assembly type of the utility model becomes size staight scissors compressometer and comprises by vertical reaction plate 13, four and be the reaction frame 1 that column 12, base plate 11, horizontal reacting force post 14, horizontal reacting force baffle plate 15 and some nuts 16 of square profile are formed, last shear box 41 and down cut box 42 and the counter force system of being made up of vertical loading device 3, horizontal charger 2 and vertical loading device rolling support 17.The height of last shear box 41 and down cut box 42 is by the number of plies decision of each self-contained sample box stiff member 40, and each is capable of being combined to go out 2.5cm, 5cm, 7.5cm, four height of 10cm.It should be noted that; 4. number sample box stiff member 40 in the last shear box 41 must be placed on the bottom; Because which is provided with ball grooves 405, the 5. number sample box stiff member 40 in the down cut box 42 must be placed on top simultaneously, is provided with ball grooves 405 on it equally; 8. number sample box stiff member 40 in the down cut box 42 must be placed on the bottom, because which is provided with rhone 406.When need are that the sample of 5cm is when carrying out draining and shearing to specimen height; Last shear box 41 has only 4. number sample box stiff member 40; Down cut box 42 should with 5. 8. number sample box stiff member 40 be fixed together, and in the cavity ring four of 8. number sample box stiff member 40, install diameter be 6.18cm, highly for the permeable stone of 2.5cm with the realization draining.
During on-test, assemble instrument earlier.Column 12, horizontal reacting force post 14 usefulness nuts 16 are fixed together with base plate 11; The down cut box 42 that assembles according to the sample blade diameter length ratio of standard defined is fixed together with base plate 11 usefulness bolts; Then in the ball grooves 405 of 5. number sample box stiff member 40, put into and support 5 an amount of steel ball after lubricated as rolling; Last shear box 41 left-hand threads that are connected equally on down cut box 42, are noticed that steel ball should embed in the closed guide slot of upper and lower ball grooves 405 formation.For avoiding left-hand thread upper and lower shear box together ball row along shear surface when adorning appearance to slide; As shown in Figure 3; Near shear surface 4., 5. insert pin in the fixedly ear 407 on the cavity ring one of number sample box stiff member 40; Upper and lower shear box is fixed, extracted out pin after dress appearance finishes and get final product.
When appearance dress, for the soil sample of human configuration, by test standard with getting final product in its sample box 4 of successively packing into.For undisturbed soil, should use special sampler barrel that getting original state appearance is put into the sample box 4 that assembles carefully and make an experiment.The size of soft rock sample also should conform to corresponding sample box inside dimension.
For the shear test of rock mass discontinuity, because specimen shape maybe be very irregular, the reply sample carries out certain processing before test.Generally be with concrete sample to be wrapped up to become with instrument to adorn the inner corresponding regular shape of appearance box so that can put into sample box, the position at structural plane place will place the shear surface position of instrument to make an experiment.
For soil sample, after sample filling finished, whether the draining of looking test installed the permeable or fluid-tight force transmitting board 6 of corresponding size additional at the sample top.For soft rock, need not consider drainage problem.
Vertical reaction plate 13 usefulness nuts are fixed on position suitable on the column 12 and it is adjusted into horizontality as far as possible.Two block plates that are carved with ball grooves and the steel ball that lubricated are assembled into the vertical loading device roll and be placed between vertical loading device 3 and the vertical reaction plate 13 after supporting 17, let vertical loading device 3 between lower floor's steel plate of the support 17 of can itself and vertical loading device being rolled after the sample application of force, interfix a little.Horizontal charger 2 is placed on the bearing made from certain thickness plancon; Its rear end contacts with horizontal reacting force seat 15; Horizontal reacting force seat 15 is threaded with horizontal reacting force post 14; Thereby can adjust the height of horizontal charger 2, the front end of horizontal charger 2 contacts with the 4. number sample box stiff member 40 of last shear box 41 near shear surface, when reducing the horizontal application of force as far as possible to the moment of torsion of shear surface.
On last shear box 41, install and measure the machinery or the digital display dial gauge of sample level and vertical deformation.Apply certain lateral pressure and can carry out shear test.Carry out quick shear test, consolidated quick shear test, slow shear test by " earthwork test rule ".Every group of test should prepare 4 to 5 samples, and its density difference must not be greater than 0.03g/cm 3, the water percentage difference must not be greater than 1%.Under different pressures, make an experiment, pressure at right angles at different levels are differential roughly the same.The staight scissors mode of operation of the direct shear test of soft rock and soil sample is roughly the same, does not just need draining in the process of the test.
During the soil sample compression test, by " earthwork test rule " regulation, this instrument is applicable to that maximum particle diameter is the coarse-grained soil of 2.5cm, and this moment, specimen finish should be 20cm, highly should be 10cm.Also can the sample of other sizes be made an experiment, but corresponding sample maximum particle diameter should reduce by standard is corresponding.Equally carry out sample preparation and test for the original state appearance or the disturbance appearance of other great soil groups by this standard.
Clock gauge is installed is measured the vertical distortion of sample.Apply lateral pressures at different levels, establishing the maximum actual pressure of soil layer is 200m level earth and rockfill dam, and maximum lateral pressure is about 4MPa, and then testing the afterbody pressure that applies is about 4200KPa.Pressure rating is generally 50,100,200,400,800,1600,3200,4200KPa, and this moment, vertical loading device 3 minimum rated load capability was 15 tons.
During the rock uniaxial compression test, according to test specification, the rock sample standard size is the cylinder of diameter 5cm, high 10cm.The dress sampling device of this moment need be formed down cut box 42 by quadruplet sample box stiff member 40, and each grip assembly not need external diameter be the cavity ring four of 10cm.Sample is put into down cut box 42, adjust the position of vertical reaction plate 13 and vertical loading device 3 simultaneously according to aforementioned operation, no longer needing this moment to note the vertical loading device to roll and support 17, available block plate replacement.Sillar collapses the bullet wound people when avoiding sample to destroy, and around sample, can install a special protective cover additional.Put the force transmitting board 6 of size and specimen finish coupling at the sample top, vertical loading device 3 forces on the force transmitting board 6 and destroys up to sample.Because the rock sample breakdown strength is many more than 100MPa, so this moment, used vertical loading device 3 should can provide 30 tons load at least.
It is 15 tons lifting jack that horizontal charger 2 and vertical loading device 3 can use the minimum rated load capability.The intensity of vertical loading device 3 can be reached for the lateral pressure that compression test provides 4.2MPa.According to standard, the described compressometer of present embodiment can be realized the direct shear and the compression concretion test of the coarse-grained soil of maximum particle diameter 2.5cm.

Claims (9)

1. assembly type becomes size staight scissors compressometer; Comprise reaction frame (1), sample box (4) and be connected with reaction frame (1) and be arranged on horizontal charger (2), the vertical loading device (3) between reaction frame (1) and the sample box (4); Said sample box (4) comprise shear box (41), down cut box (42) and be arranged on shear box (41) and down cut box (42) between rolling support (5); It is characterized in that: said upward shear box (41), down cut box (42) all adopt assembly type to become size sample box external member; Said assembly type becomes size sample box external member and is made up of the sample box stiff member (40) that at least two covers can mutual range upon range of connection; Every suit sample box stiff member (40) comprises at least two mutually nested dress appearance rings (400); In each adjacent two dress appearance ring (400), the outer rim that is positioned at inboard dress appearance ring (400) fits with the inner edge of the dress appearance ring (400) that is positioned at the outside, and being positioned at inboard dress appearance ring (400), to be positioned at the dress appearance ring (400) in the outside axially unidirectional spacing; Outermost dress appearance ring (401) is provided with rolling support matching structure in the wherein cover sample box stiff member (40) of composition assembly type change size sample box external member.
2. assembly type as claimed in claim 1 becomes size staight scissors compressometer; It is characterized in that: in said each adjacent two dress appearance ring (400); Be positioned at inboard dress appearance ring (400) outer rim and be provided with positioning spigot (402), dress appearance ring (400) inner edge that is positioned at the outside is provided with and the corresponding locating slot (403) of corresponding positioning spigot (402).
3. assembly type as claimed in claim 2 becomes size staight scissors compressometer, it is characterized in that: described sample box stiff member (40) comprises that also one group is filled up part (404) with locating slot matees.
4. assembly type as claimed in claim 2 becomes size staight scissors compressometer, it is characterized in that: the positioning spigot (402) and/or the locating slot (403) of said each dress appearance ring (400) have four, and the layout that is centrosymmetric.
5. become size staight scissors compressometer like the described assembly type of any claim in the claim 1~4; It is characterized in that: all offer rhone (406) on each dress appearance ring (400) of a said wherein cover sample box stiff member (40); When each dress appearance ring (400) is nested with setting means; Rhone (406) on each dress appearance ring (400) is formed groove, otherwise wherein has at least two rhones (406) on the adjacent dress appearance ring (400) to stagger each other.
6. become size staight scissors compressometer like the described assembly type of any claim in the claim 1~4, it is characterized in that: the said outer rim that is provided with the dress appearance ring (401) of the support matching structure that rolls is square, and outer rim is provided with two fixedly ears (407).
7. become size staight scissors compressometer like the described assembly type of any claim in the claim 1~4; It is characterized in that: said compressometer also comprises one group of force transmitting board (6); Each piece plate in this group force transmitting board (6) respectively with sample box stiff member (40) in the inner edges of different dress appearance rings (400) be complementary, the center of force transmitting board (6) is provided with the counterbore (61) with vertical loading device coupling.
8. assembly type as claimed in claim 7 becomes size staight scissors compressometer, it is characterized in that: said force transmitting board (6) is for being laid with the porous disc of permeable hole (62).
9. become size staight scissors compressometer like the described assembly type of any claim in the claim 1~4; It is characterized in that: said reaction frame (1) comprises the column (12) of base plate (11), vertical reaction plate (13), horizontal reacting force post (14) and four rectangular distribution; Column (12) and horizontal reacting force post (14) are screw mandrel; Base plate (11) is parallel to each other with vertical reaction plate (13) and is vertical with each column (12) and be fixed on each column (12) through nut (16); The horizontal reacting force seat (15) that on horizontal reacting force post (14), has been threaded, the stiff end of horizontal charger (2) contacts with horizontal reacting force seat (15).
CN2011205157538U 2011-12-12 2011-12-12 Assembled variable-size direct shear compressometer Withdrawn - After Issue CN202383028U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN2011205157538U CN202383028U (en) 2011-12-12 2011-12-12 Assembled variable-size direct shear compressometer

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN2011205157538U CN202383028U (en) 2011-12-12 2011-12-12 Assembled variable-size direct shear compressometer

Publications (1)

Publication Number Publication Date
CN202383028U true CN202383028U (en) 2012-08-15

Family

ID=46631523

Family Applications (1)

Application Number Title Priority Date Filing Date
CN2011205157538U Withdrawn - After Issue CN202383028U (en) 2011-12-12 2011-12-12 Assembled variable-size direct shear compressometer

Country Status (1)

Country Link
CN (1) CN202383028U (en)

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102435510A (en) * 2011-12-12 2012-05-02 四川大学 Assembled variable dimension direct shearing compression apparatus
CN102854069A (en) * 2012-09-24 2013-01-02 中国能源建设集团广东省电力设计研究院 Large-scale direct shear apparatus
CN102980809A (en) * 2012-11-20 2013-03-20 河海大学 Earth mass stillness lateral-compression coefficient determinator
CN103759957A (en) * 2013-12-25 2014-04-30 广西科技大学 Geogrid pull-out test device
CN104614231A (en) * 2015-02-12 2015-05-13 南京工业大学 Loadable stratiform shearing model soil box
CN104964883A (en) * 2015-06-26 2015-10-07 中国科学院地质与地球物理研究所 Landslide shear strength and shear zone deformation test method
CN105115833A (en) * 2015-06-26 2015-12-02 中国科学院地质与地球物理研究所 Strain control type gravel soil large-scale interlaminar shear test apparatus
CN107941597A (en) * 2017-11-27 2018-04-20 同济大学 A kind of shear box reduced scale device for large scale rectangle geotechnique's direct shear apparatus
CN109030242A (en) * 2018-08-15 2018-12-18 三峡大学 A kind of electromagnetic power rock direct shear apparatus and operating method
CN109283058A (en) * 2018-10-30 2019-01-29 山东大学 It is applicable in the adjustable three-dimensional load test system of different size and shape steel concrete components
CN109557023A (en) * 2018-11-19 2019-04-02 河海大学 It is a kind of can self-adapting stretching deformation platen systems and its application method

Cited By (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102435510A (en) * 2011-12-12 2012-05-02 四川大学 Assembled variable dimension direct shearing compression apparatus
CN102435510B (en) * 2011-12-12 2013-06-12 四川大学 Assembled variable dimension direct shearing compression apparatus
CN102854069A (en) * 2012-09-24 2013-01-02 中国能源建设集团广东省电力设计研究院 Large-scale direct shear apparatus
CN102980809A (en) * 2012-11-20 2013-03-20 河海大学 Earth mass stillness lateral-compression coefficient determinator
CN103759957A (en) * 2013-12-25 2014-04-30 广西科技大学 Geogrid pull-out test device
CN104614231A (en) * 2015-02-12 2015-05-13 南京工业大学 Loadable stratiform shearing model soil box
CN104964883A (en) * 2015-06-26 2015-10-07 中国科学院地质与地球物理研究所 Landslide shear strength and shear zone deformation test method
CN105115833A (en) * 2015-06-26 2015-12-02 中国科学院地质与地球物理研究所 Strain control type gravel soil large-scale interlaminar shear test apparatus
CN105115833B (en) * 2015-06-26 2017-10-27 中国科学院地质与地球物理研究所 A kind of strain controlling formula rubble soil large-scale layer shear test device
CN107941597A (en) * 2017-11-27 2018-04-20 同济大学 A kind of shear box reduced scale device for large scale rectangle geotechnique's direct shear apparatus
CN107941597B (en) * 2017-11-27 2020-10-30 同济大学 Shearing box scaling device for large-size rectangular geotechnical direct shear apparatus
CN109030242A (en) * 2018-08-15 2018-12-18 三峡大学 A kind of electromagnetic power rock direct shear apparatus and operating method
CN109030242B (en) * 2018-08-15 2020-09-22 三峡大学 Electromagnetic power rock direct shear apparatus and operation method
CN109283058A (en) * 2018-10-30 2019-01-29 山东大学 It is applicable in the adjustable three-dimensional load test system of different size and shape steel concrete components
CN109557023A (en) * 2018-11-19 2019-04-02 河海大学 It is a kind of can self-adapting stretching deformation platen systems and its application method
CN109557023B (en) * 2018-11-19 2021-02-12 河海大学 Pressure plate system capable of self-adaptive stretching deformation and use method thereof

Similar Documents

Publication Publication Date Title
CN202383028U (en) Assembled variable-size direct shear compressometer
CN102435510B (en) Assembled variable dimension direct shearing compression apparatus
CN202383029U (en) Assembled size-variable dual-sided shearing apparatus
CN102494958A (en) Assembled size-changeable double-face shear apparatus
CN102419284B (en) Assembled variable-dimension sample box suite
CN104614497B (en) True triaxial stream pressure fracturing, slot, seepage flow, gas drive integrated experimental system
CN102175533B (en) Ultra-large type geotechnical engineering three-dimensional model test system
Hight et al. The development of a new hollow cylinder apparatus for investigating the effects of principal stress rotation in soils
CN102175516B (en) Large-sized combined dynamic and static multifunctional geotechnical engineering simulation testing device
CN106840810B (en) A kind of ring shear test and preparation of soil sample device suitable for vertical shearing face
Sadrekarimi et al. A new ring shear device to measure the large displacement shearing behavior of sands
CN201983987U (en) Extra-large geotechnical engineering three-dimensional model test system
CN102967506B (en) Middle-sized rock servo control true triaxial test device
CN101344445A (en) Self-balancing type true three-dimensional loading model testing bench frame with sliding wall
CN201266124Y (en) Self-balancing type true three-dimensional loading model testing bench frame with sliding wall
CN202383010U (en) Assembling-type variable-size sample box member
CN107036909B (en) A kind of ring shear test instrument suitable for vertical shearing face
CN104075921A (en) Centrifugal model foundation soil layer consolidometer
CN102496329B (en) Physical experimental apparatus for simulation of mudstone smearing, forming and evolution and usage of apparatus
CN108801807B (en) A kind of pile-soil interface shearing dynamic characteristic test apparatus
CN203376215U (en) Rock direct shear apparatus applicable to large-span loads and multi-scale samples
CN105842418B (en) Real-time measurement excavates the model test apparatus of slope landslide slope-mass slide displacement stress
CN210071525U (en) Pressure chamber for large-diameter sandy gravel stratum triaxial experiment
CN104404940B (en) A kind of Deep Soil Layers high pressure waterproof self-stabilising load test device
CN110686980A (en) Tunnel excavation analogue means under inhomogeneous side direction load

Legal Events

Date Code Title Description
C14 Grant of patent or utility model
GR01 Patent grant
RGAV Abandon patent right to avoid regrant
AV01 Patent right actively abandoned

Granted publication date: 20120815

Effective date of abandoning: 20130612