CN108414304A - A kind of mold and method made for coupled shear-flow test joint samples - Google Patents
A kind of mold and method made for coupled shear-flow test joint samples Download PDFInfo
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- CN108414304A CN108414304A CN201810069513.6A CN201810069513A CN108414304A CN 108414304 A CN108414304 A CN 108414304A CN 201810069513 A CN201810069513 A CN 201810069513A CN 108414304 A CN108414304 A CN 108414304A
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- joint
- gusset body
- joint samples
- flow test
- coupled shear
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/28—Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q
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- Life Sciences & Earth Sciences (AREA)
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Abstract
The present invention relates to a kind of molds and method made for coupled shear-flow test joint samples, the mold includes bottom plate, the gusset body being placed on and the cover board being covered at the top of gusset body, the gusset body includes four pieces of side shields abutted successively, one end of every piece of side shield is abutted with the middle part of adjacent one piece of side shield, and fixed by screw and positioning pin, the cover board at the top of screw and four pieces of side shields by being fixedly connected.The material of finally obtained joint samples includes that mass ratio is 1：(1.1‑1.3)：(2.0‑3.0)：(0.08‑0.15)：The resin concrete of (0.04 0.1) includes epoxy resin, cement, sand, dibutyl ester and ethylenediamine.Compared with prior art, the rock joint sample of size required for the present invention can be produced accurately；And joint production method safe operation, the simplicity；Can be mass-produced sample, and sample works well, and joint samples preparation and curing cycle it is short, joint intensity is high.
Description
Technical field
The present invention relates to rock mechanics and permeation fluid mechanics technical field, and in particular to a kind of to make for shearing seepage flow coupling
Test the mold and method of joint samples.
Background technology
By long-term complicated geomechanics effect, the joint plane of many different scales can be formed in rock mass, due to it
Intensity and deformation parameter often one lower than rock material even several orders of magnitude, be the decisive of engineering rock mass stability
Factor.In addition, the hypotonicity relative to rock material itself, joint plane becomes the main of Groundwater movement in rock mass engineering project
Channel, especially recently as underground deep rock mass engineering project such as nuclear waste disposal, oil-gas storage, CO2The heavy constructions such as seal up for safekeeping
It builds, one of the key factor whether hydraulic properties of ROCK MASS JOINT are relationship such engineering safeties.And rock joint shear
Seepage coupling test is the most direct effective means of research ROCK MASS JOINT hydraulic characteristic, is corresponded to for quantitative study research of joints roughness coefficient of rock
The influence of power-seepage flow coupled characteristic need to use the joint test specimen with identical research of joints roughness coefficient of rock to carry out different normal force and difference
The experiment under hydraulic pressure is permeated, is all made of replicates the method for Rock Joint Plane to be studied at present.In addition, carrying out rock joint
It is stringenter to the shape need of joint test specimen during coupled shear-flow test, the generally length of 100 × 100 × 200mm
Cube test specimen, it is desirable that dimensional accuracy is higher, and stress surface is smooth and parallel, and bias, joint examination are otherwise will appear in loading procedure
Part is not placed into shearing seepage flow box and is phenomena such as side leakproofness is bad, causes test result inaccurate.
There are problems that two about the selection of the material of rock joint shear seepage coupling test and making at present：First, more
Rock Joint Plane is replicated using materials such as gypsum, cement mortar, compression strength is relatively low, cannot complete high normal stress and height
Joint coupled shear-flow test under hydraulic pressure, and the mechanical characteristic of rock-like materials cannot be more realistically restored, second is that saving
It manages in manufacturing process, the reduction degree of upper and lower research of joints roughness coefficient of rock is relatively low, and upper and lower joint plane is not complete coupling (i.e. joint plane
Initial gap width is that 0), while the size at joint cannot accurately control, and be installed in test manufacturing process, dismounting more fiber crops
It is tired.
Invention content
It is an object of the present invention to overcome the above-mentioned drawbacks of the prior art and provide a kind of making for shearing
The mold and method of seepage coupling test joint samples.
The purpose of the present invention can be achieved through the following technical solutions：A kind of make is used for coupled shear-flow test section
The mold of sample is managed, which includes bottom plate, the gusset body being placed on and the cover board being covered at the top of gusset body, institute
It includes four pieces of side shields abutted successively to state gusset body, and one end of every piece of side shield is abutted with the middle part of adjacent one piece of side shield,
And fixed by screw and positioning pin, the cover board at the top of screw and four pieces of side shields by being fixedly connected.
Multiple square grooves are equipped at the top of side shield described in every piece.
It is equipped at least two square groove at the top of every piece of side shield.Square groove is set, is to add resin concrete
When, extra resin concrete can be allowed to flow out, to ensure that the top of joint samples is horizontal and is bonded completely with cover board.
A method of coupled shear-flow test joint samples, including following step are used for using Mold Making as described above
Suddenly：
(1) the natural rock sample being bonded just with wall in gusset body is processed, joint is face-up and is placed on,
And the inner wall of the side wall fitting gusset body of natural rock sample, liquid silica gel then is poured into gusset body, waits for that liquid silicon is gelled
After Gu, the Silicon moulds that a side is replicated with joint profile are obtained；
(2) Silicon moulds are placed on gusset body bottom, and the joint profile of Silicon moulds is placed up, then in gusset body
Middle addition resin concrete covers cover board and is conserved until resin concrete is full of entire gusset body, and then demoulding obtains half
Block joint samples；
(3) the half block joint samples that step (2) obtains are placed on gusset body bottom, and the joint shape of half block joint samples
Looks are placed up, are then poured other half block joint samples according to the method for step (2), are used for up to described after maintenance demoulding
Coupled shear-flow test sample.
Containing 2%~3% curing agent in the liquid silica gel, curing agent can select vulcanizing agent etc., in liquid silica gel
Middle addition curing agent, can be such that liquid silica gel quickly solidifies, form Silicon moulds as early as possible.
When the liquid silica gel solidification, liquid silica gel is heated with heat gun, and makes its flowing to eliminate bubble.
When the Silicon moulds are placed on gusset body bottom, pad sets steel plate, and the thickness of steel plate between Silicon moulds and bottom plate
The 48%~52% of gusset body total height is accounted for the sum of the average thickness of Silicon moulds.Such setting is so that finally obtained half block
The height of joint samples accounts for 50% or so of gusset body, to ensure that joint profile is in sample in final complete coupling sample
Middle part.
The resin concrete includes epoxy resin, cement, sand, dibutyl ester and ethylenediamine, the epoxy resin, cement,
The mass ratio of sand, dibutyl ester and ethylenediamine is 1：(1.1-1.3)：(2.0-3.0)：(0.08-0.15)：(0.04-0.1), this is matched
The resin concrete compression strength of ratio is higher, easy mold release and sample preparation and curing cycle are short.
The cement is 525 white portland cement of high grade.Sand in the drying of free from admixture is selected, it will according to quality proportioning
Middle sand stirs evenly spare as aggregate with 525 white portland cement of high grade；Using the epoxy resin conduct marked as E44
Binder, this is that a kind of product size stability is good, hardness is high and the preferable organic compound of flexibility；Toughener uses two fourths
Ester, the product cost is low, plasticization effect is excellent and environmentally friendly, while also acting as diluting effect；Curing agent selects ethylenediamine, because it has
Corrosivity needs to wear special anticorrosion gloves in stirring.According to above-mentioned each component quality proportioning by epoxy resin, two
Butyl ester and ethylenediamine are stirred evenly as base fluid.
During the resin concrete is added to gusset body, entire mold is placed on a vibration table, resin concrete
It is vibrated while being added, and be added several times, stirring rod is used in combination to consolidate the resin concrete.
Compared with prior art, beneficial effects of the present invention are embodied in following several respects：
(1) a kind of new jointed material is obtained, at low cost, sample preparation and curing cycle are short, and the intensity at joint is high；
(2) a kind of prefabricated mould that rock joint replicates, the rock section of size required for capable of accurately producing are invented
Manage sample；
(3) joint production method safe operation, the simplicity；
(4) can be mass-produced sample, and sample works well.
Description of the drawings
Fig. 1 is the dimensional structure diagram of the mold of the present invention；
Fig. 2 is the front view of inventive die；
Fig. 3 is the side view of inventive die；
Fig. 4 is the vertical view of inventive die；
Fig. 5 is the stereogram of disassembling positioning pin bar of the present invention for splitting mold；
Fig. 6 is the front view of disassembling positioning pin bar of the present invention for splitting mold.
Wherein, 1 is bottom plate, and 2 be short side baffle, and 3 be long side shield, and 4 be cover board, and 5 be screw, and 6 be positioning pin, and 7 be side
Shape slot, 8 be external thread rod, and 9 be mobile jib pedestal, and 10 be mobile jib, and 11 be hollow cylinder.
Specific implementation mode
It elaborates below to the embodiment of the present invention, the present embodiment is carried out lower based on the technical solution of the present invention
Implement, gives detailed embodiment and specific operating process, but protection scope of the present invention is not limited to following implementation
Example.
Embodiment 1
A kind of mold made for coupled shear-flow test joint samples, as shown in figures 1-4, including bottom plate 1, two
2, two long side shields 3 of a short side baffle, cover board 4, screw 5, positioning pin 6 and square groove 7.In assembling, first a short side is kept off
Plate 2 and a long side shield 3 are fixed with two positioning pins 6, then by 2 and one long side shield 3 of another short side baffle, two positioning pins 6
It is fixed, after silica gel plate replicated at mating joint be positioned in the cavity of the long short slab of combinations of the above with rectangle iron block, then will
Four additional positioning pin 6 is installed with eight screws 5 so that fastening is integral, at the inside surrounding of long short side plate and the bottom of cover board
Portion applies and spreads epoxy resin mortar parting agent special, can thus start from the upper half block of rock joint.
In order to successfully extract positioning pin 6, disassembling positioning pin bar is devised, structure is as shown in Figure 5, Figure 6, by outer spiral shell
Rasp bar 8, mobile jib pedestal 9, mobile jib 10 and hollow cylinder 10 form, and threaded rod 8 is screwed into the internal thread of positioning pin 6 by when use
In, hollow cylinder 10 rearward hits mobile jib pedestal 9, you can is easy to extract positioning pin.
A method of it makes and is used for coupled shear-flow test joint samples, include the following steps：
Produce that rock sample completely cleaves tension joint or field condition selects natural section by artificial splitting method
The joint plane (100 × 200mm) to form predetermined size is manually cut and polished behind reason face, in this, as natural rock sample.It will
Above-mentioned joint mold is put at the clean template joint of surface clean, then liquid silica gel is added to the curing agent of 2%-3%
And stir evenly, it pours into certain thickness in mold, carrying out heating to solution using heat gun makes its flowing eliminate bubble, waits for
It cures the duplication Silicon moulds that form removal can be obtained Rock Joint Plane.
The thickness averaged that the surrounding of manufactured rock joint silica gel pattern mould is measured with slide calliper rule, is then processed into one
The rectangle iron block being sized, the thickness of the iron block are the difference of the half value and the above-mentioned average value sought of joint samples height
Value, the length and width of the iron block are processed into the length and width for being slightly less than the rock joint silica gel mould, to be easy peace
Dress.
The process for making high intensity jointed material is as follows：
1, the high intensity jointed material, is made of epoxy resin, cement, sand, toughener and curing agent, according to rock joint
The mass ratio epoxy resin of coupled shear-flow test specimen size and each component：Cement：Sand：Toughener：Curing agent=1：
1.2：2.5：0.1：0.05, to estimate the constituent mass (need to repeatedly manufacture experimently) needed for half block joint.
2, sand in the drying of free from admixture is selected, is stirred middle sand and 525 white portland cement of high grade according to quality proportioning
It mixes uniformly spare as aggregate；Using the epoxy resin marked as E44 as binder, this is a kind of product size stability
Good, hardness height and the preferable organic compound of flexibility；Toughener uses dibutyl ester, and the product cost is low, plasticization effect is excellent
And environmental protection, while also acting as diluting effect；Curing agent selects ethylenediamine, because it is corrosive, needs to wear in stirring special
Anticorrosion gloves.Epoxy resin, dibutyl ester and ethylenediamine are stirred evenly as base according to above-mentioned each component quality proportioning
Liquid.
3, above-mentioned aggregate and base fluid are mixed evenly as the material for making rock joint, mobility is preferable
Mortar material injects in prefabricated joint mold, pours at twice；Whole set of die placement is vibrated on a vibration table afterwards, while with stirring
Stick tamping is mixed, is after a period of time substantially polished mortar top layer with trowel, mortar material will inject, so as to upper cover plate more
Extra mortar can overflow exudation from square groove 7 after being fastened with surrounding baffle, and the manufactured joint plane of guarantee is smooth.
4, it can be demoulded after sample conserves 3 hours, with repairing knife by the half block joint samples surrounding of demoulding and square groove phase
The extra jointed material excision and equating of connection.
5, after complete upper joint block to be produced, by the joint, test block is put into joint and is made in mold, using identical sample preparation
Technique and method, repeat the above steps 2,3 and 4, to make other half block joint samples, are taken off after sample conserves 3 hours
The joint samples of mould, such one piece upper and lower joint plane coupling are made, and prefabricated high intensity model jointed material is supported
Shield, curing time are no less than 7 days, and 28 days best, keeps environmental drying, temperature is at 20 DEG C or more.Design curing time to be achieved
Afterwards, you can carry out rock joint shear seepage tests.
Claims (10)
1. a kind of mold made for coupled shear-flow test joint samples, which is characterized in that the mold includes bottom plate, puts
The cover board set the gusset body on bottom plate and be covered at the top of gusset body, the gusset body include four pieces of side blocks abutted successively
Plate, one end of every piece of side shield is abutted with the middle part of adjacent one piece of side shield, and is fixed by screw and positioning pin, the cover board
By being fixedly connected at the top of screw and four pieces of side shields.
2. a kind of mold made for coupled shear-flow test joint samples according to claim 1, feature exist
In equipped with multiple square grooves at the top of the side shield described in every piece.
3. a kind of mold made for coupled shear-flow test joint samples according to claim 2, feature exist
In equipped at least two square groove at the top of every piece of side shield.
4. a kind of side being used for coupled shear-flow test joint samples using the Mold Making as described in claims 1 to 3 is any
Method, which is characterized in that include the following steps：
(1) the natural rock sample being bonded just with wall in gusset body is chosen, joint is face-up and is placed on, and day
The inner wall of the side wall fitting gusset body of right rock sample, then pours into liquid silica gel into gusset body, after liquid silica gel solidification,
Obtain the Silicon moulds that a side is replicated with joint profile；
(2) Silicon moulds are placed on gusset body bottom, and Silicon moulds has joint profile to place up, then in gusset body
Resin concrete is added, until resin concrete is full of entire gusset body, covers cover board and is conserved, then demoulding obtains half block
Joint samples；
(3) the half block joint samples that step (2) obtains are placed on gusset body bottom, and the joint profile face of half block joint samples
It places upward, then other half block joint samples is poured according to the method for step (2), up to described for shearing after maintenance demoulding
Seepage coupling test sample.
5. a kind of method made for coupled shear-flow test joint samples according to claim 4, feature exist
In containing 2%~3% curing agent in the liquid silica gel.
6. a kind of method made for coupled shear-flow test joint samples according to claim 4, feature exist
When, liquid silica gel solidification, liquid silica gel is heated with heat gun, and make its flowing to eliminate bubble.
7. a kind of method made for coupled shear-flow test joint samples according to claim 4, feature exist
In when the Silicon moulds are placed on gusset body bottom, pad sets steel plate, and the thickness and silica gel of steel plate between Silicon moulds and bottom plate
The sum of average thickness of mould accounts for the 48%~52% of gusset body total height.
8. a kind of method made for coupled shear-flow test joint samples according to claim 4, feature exist
In the resin concrete includes epoxy resin, cement, sand, dibutyl ester and ethylenediamine, the epoxy resin, cement, sand, two
The mass ratio of butyl ester and ethylenediamine is 1：(1.1-1.3)：(2.0-3.0)：(0.08-0.15)：(0.04-0.1).
9. a kind of method made for coupled shear-flow test joint samples according to claim 4, feature exist
In the cement is 525 white portland cement of high grade.
10. a kind of method made for coupled shear-flow test joint samples according to claim 4, feature exist
During the resin concrete is added to gusset body, entire mold is placed on a vibration table, and resin concrete is several times
It is vibrated while being added, and be added, stirring rod is used in combination to consolidate the resin concrete.
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| CN201710942333X | 2017-10-11 | ||
| CN201710942333 | 2017-10-11 |
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Cited By (4)
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| CN109163949A (en) * | 2018-09-28 | 2019-01-08 | 中国矿业大学 | A kind of production method of the rocks of crack containing native three dimensional sample |
| CN109490055A (en) * | 2018-10-18 | 2019-03-19 | 浙江海洋大学 | A kind of mold and its application method making simulation rock mass discontinuity |
| CN113720671A (en) * | 2021-08-30 | 2021-11-30 | 歌尔光学科技有限公司 | Preparation method of test sample strip |
| CN114136747A (en) * | 2021-11-23 | 2022-03-04 | 中铁二十局集团第四工程有限公司 | Method for manufacturing rock sample containing complex joints |
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| CN114136747A (en) * | 2021-11-23 | 2022-03-04 | 中铁二十局集团第四工程有限公司 | Method for manufacturing rock sample containing complex joints |
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Application publication date: 20180817 |