CN102661914A - High-pressure low-temperature triaxial corrosion experimental device and experimental method thereof - Google Patents
High-pressure low-temperature triaxial corrosion experimental device and experimental method thereof Download PDFInfo
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- CN102661914A CN102661914A CN2012101359243A CN201210135924A CN102661914A CN 102661914 A CN102661914 A CN 102661914A CN 2012101359243 A CN2012101359243 A CN 2012101359243A CN 201210135924 A CN201210135924 A CN 201210135924A CN 102661914 A CN102661914 A CN 102661914A
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Abstract
The invention relates to a high-pressure low-temperature triaxial corrosion experimental device, and aims to provide a high-pressure low-temperature triaxial corrosion experimental device which is simple in structure and convenient to operate to provide experimental basis and basic data for accurately understanding deep karst development characteristics and provide scientific basis for subsequent necessary engineering supporting measures. The device is fixed on an experiment table, and is characterized by comprising a confining pressure bin seat riveted with the experiment table, a confining pressure bin cover fixedly riveted on the top of the seat, and an axial load server arranged above the bin cover, wherein the outside of the confining pressure bin seat has a circular truncated cone shape, and a hollow cylindrical confining bin is formed in the confining pressure bin seat; the confining pressure bin cover is a flat plate and is provided with a through hole of which the diameter is matched with that of a sample; and the axial load server consists of two cylinders with different diameters, and a pressure gauge is arranged in an upper cylinder with a large diameter and is communicated with the confining pressure bin below through a pipeline. The high-pressure low-temperature triaxial corrosion experimental device is suitable for underground engineering such as hydraulic and hydro-power engineering, traffic and mines.
Description
Technical field
The present invention relates to three corrosion experimental provisions of a kind of high pressure low temperature and experimental technique thereof.Be applicable to underground workss such as Hydraulic and Hydro-Power Engineering, traffic, mine.
Background technology
According to the karst development characteristics in the engineering district and the needs of project construction; (comprise artificial material like hypogee, dam foundation, traffic tunnel or other rock soil mass especially; Like concrete); Owing to suffer high pressure seepage flow, corrosion for a long time, the abominable nature and the influence of running environment such as wash away, cause the rock soil mass overall characteristic As time goes on to the direction variation of its function and security reduction.Water and the rock soil mass interaction long-term existence of bearing high pressure cause that the border country rock produces microfissure and many coupling effects damage, and the freezing effect of low temperature has especially in addition been quickened the speed of its reduction undoubtedly.Above aspect all causes the problem such as reduce of country rock physico-mechanical properties easily, and promptly along with the increase at operation age, country rock can wear out gradually.Engineering higher-pressure region rock soil mass endurance issues is one of focal issue of countries in the world engineering circle common concern all the time.So far, under the seepage flow condition of high pressure low temperature, relative to lacking to the karst region to the corrosion characteristic and the corrosion Depth Study of rock mass.
Summary of the invention
The technical matters that the present invention will solve is: to the problem of above-mentioned existence; Three corrosion experimental provisions of a kind of simple in structure, easy to operate high pressure low temperature and experimental technique thereof are provided; For being familiar with the deep karst development characteristics exactly experimental basis and basic data are provided, and scientific basis are provided for necessary engineering support measure of later stage.
The technical scheme that the present invention adopted is: three corrosion experimental provisions of high pressure low temperature; This device is fixed on the experiment table; It is characterized in that: said experimental provision comprises with the confined pressure Cang Gai at the confined pressure storehouse seat of experiment table riveted joint, the present top of rivet clasp and is located at the axial compression servomechanism of the side of covering, storehouse; This seat outside, confined pressure storehouse is truncated cone-shaped, and inside is the confined pressure storehouse of hollow cylindrical, and confined pressure Cang Gai is one dull and stereotyped and have a through hole that diameter and specimen finish are complementary; The axial compression servomechanism is made up of two different right cylinders of diameter; Tensimeter is housed in the upper diameter large cylinder also is communicated with the confined pressure storehouse of below through pipeline, also pass an aqueduct in the said axial compression servomechanism, aqueduct one end communicates with the confined pressure storehouse; The other end is communicated with outside karst water through temperature controller, flow instrument I, high-pressure pump successively, and the centre of said experiment table is equipped with the flow instrument II.
Adopt three corrosion experimental provisions of high pressure low temperature to carry out the method for corrosion experiment, it is characterized in that comprising step:
1) gets former state water or prepare, the cooling of pressurizeing of the high-pressure pump of flowing through successively, flow instrument and temperature controller according to the chemical feature of engineering district karst water;
2) choosing 3 column type cores is sample, and with the impurity such as dust on distilled water washed samples surface, the diameter of 3 samples is 20mm, height 30mm;
3) sample is placed on dries 24 hours in the drying baker, claim its weight, note is made W
1, unit: mg;
4) 3 lateral pressure σ that sample applied
1, be respectively 40Mpa, 50Mpa and 60Mpa;
5) 3 levels that sample applied are to confined pressure σ
2=σ
3, be respectively 20Mpa, 30Mpa and 40Mpa;
6) karst water hydraulic pressure is respectively 15Mpa, 25Mpa and 35Mpa;
7) temperature of karst water is controlled at 10 ℃;
8) monitor the flow instrument data in real time, when the flow instrument data become big suddenly, should stop test;
9) each sample in the confined pressure storehouse test period 24 hours, first sample σ that makes an experiment
1Be 40Mpa, σ
2=σ
3Be 20Mpa, karst water hydraulic pressure is 15Mpa; Second sample σ that makes an experiment
1Be 50Mpa, σ
2=σ
3Be 30Mpa, karst water hydraulic pressure is 25Mpa; The 3rd sample σ that makes an experiment
1Be 60Mpa, σ
2=σ
3Be 40Mpa, karst water hydraulic pressure is 35Mpa;
10) after each test finishes, this sample is put into drying baker dried 24 hours, sweep off floating dust, adopt the per mille scales/electronic balance weighing, the weight that draws three groups of corrosions experiment back samples is remembered respectively and is made W
2, W
3, W
4, unit: mg;
11) get the tail water infiltration water,, calculate calcium carbonate content T through indoor chemical examination
i(i=2,3,4), unit: mg/L;
12) ask for corrosion amount and erosion rate:
Quality corrosion amount a
i=W
1– W
i(i=2,3,4)
Quality erosion rate c
i=(W
1– W
i)/24 (i=2,3,4)
Erosion rate X
i=4E
iT
i/ 100 (i=2,3,4) unit: mm/ thousand; Wherein, E is a depth of erosion, unit: dm.
The invention has the beneficial effects as follows: this experimental provision is simple in structure, easy to operate; Experiment through this device; Can grasp underground deep building and other bears high pressure low temperature underground hole group country rock under stressed corrosion state; Along with the variation of external condition, its corrosion rule reaches the corrosion influence to the rock mass sample; Grasp the inner solution corrosion process of carbonatite under water under high pressure infiltration condition and the cryogenic high pressure state in underground deep simultaneously, removing the potential danger of engineering, and scientific basis is provided for follow-up mechanical test.
Description of drawings
Fig. 1 is the cut-open view of experimental provision of the present invention.
Fig. 2 is the vertical view of experimental provision of the present invention.
Embodiment
Like Fig. 1, shown in Figure 2, present embodiment is three corrosion experimental provisions of a kind of high pressure low temperature, comprises experiment table 1, confined pressure storehouse seat 13, confined pressure storehouse lid 14 and axial compression servomechanism 8 etc., and wherein experiment table 1 centre is provided with pod apertures and flow instrument II 11 is installed.Confined pressure storehouse seat 13 is riveted on the experiment table 1 through rivet 9, and top and confined pressure storehouse lid 14 are fixing.Seat 13 outsides, said confined pressure storehouse are truncated cone-shaped, and inside is the confined pressure storehouse 10 of hollow cylindrical, is used to place institute's test specimens in the confined pressure storehouse 10, and can apply level to confined pressure σ to sample
2, σ
3Said confined pressure storehouse lid 14 is a flat board, and heart position has the through hole that diameter and specimen finish are complementary therein.Corresponding to the through hole on the confined pressure storehouse lid 14, in the side of covering, storehouse axial compression servomechanism 8 is installed and (is applied lateral pressure σ to sample in the confined pressure storehouse 10 of below
1), both are through rivet 9 rivet clasps.Tensimeter 6 is housed on the axial compression servomechanism 8 and passes through pipeline and be communicated with the confined pressure storehouse 10 of below; Also be provided with an aqueduct 12 in this axial compression servomechanism; Aqueduct one end (water delivering orifice) communicates with confined pressure storehouse 10; The other end is communicated with outside karst water 2 through temperature controller 5, flow instrument I 4, high-pressure pump 3 successively, and karst water is imported in this experimental provision after the pressurization cooling is handled.
The method that adopts three corrosion experimental provisions of high pressure low temperature to experimentize in the present embodiment is following:
1) get former state water and perhaps prepare according to the chemical feature of engineering district karst water, consider actual conditions, the high-pressure pump 3 of flowing through successively, flow instrument I 4 and temperature controller 5 pressurize to lower the temperature and handle;
2) choosing 3 column type cores is sample 7, and with the impurity such as dust on distilled water washed samples surface, the diameter of 3 samples is 20mm, height 30mm;
3) sample is placed on dries 24 hours in the drying baker, claim its weight, note is made W
1, unit: mg;
4) 3 lateral pressure σ that sample applied
1, be respectively 40Mpa, 50Mpa and 60Mpa;
5) 3 levels that sample applied are to confined pressure σ
2=σ
3, be respectively 20Mpa, 30Mpa and 40Mpa;
6) karst water hydraulic pressure is respectively 15Mpa, 25Mpa and 35Mpa;
7) temperature of karst water is controlled at 10 ℃;
8) monitor flow instrument 4 data in real time, when the flow instrument data become big suddenly, should stop test, excessive with waterproofing pressure, cause the sample hydraulic fracture, cause test failure;
9) each sample in the confined pressure storehouse 10 test periods 24 hours, first sample σ that makes an experiment
1Be 40Mpa, σ
2=σ
3Be 20Mpa, karst water hydraulic pressure is 15Mpa; Second sample σ that makes an experiment
1Be 50Mpa, σ
2=σ
3Be 30Mpa, karst water hydraulic pressure is 25Mpa; The 3rd sample σ that makes an experiment
1Be 60Mpa, σ
2=σ
3Be 40Mpa, karst water hydraulic pressure is 35Mpa;
10) after each test finishes, this sample is put into drying baker dried 24 hours, sweep off floating dust, adopt the per mille scales/electronic balance weighing, the weight that draws three groups of corrosions experiment back samples is remembered respectively and is made W
2, W
3, W
4, unit: mg;
11) get tail water infiltration water (centre via experiment table is equipped with the water that the flow instrument II flows out, and is test karst water later),, draw calcium ion concentration, calculate calcium carbonate content T through chemical equation through indoor chemical examination
i(i=2,3,4), unit: mg/L;
12) ask for corrosion amount and erosion rate:
Quality corrosion amount a
i=W
1– W
i(i=2,3,4)
Quality erosion rate c
i=(W
1– W
i)/24 (i=2,3,4)
Erosion rate X
i=4E
iT
i/ 100 (i=2,3,4) unit: mm/ thousand; Wherein, E is a depth of erosion, can obtain unit through apparatus measures: dm.
The quality erosion rate is meant the whole loss percentage of (per hour generally being) test specimen in the unit interval; Erosion rate is the karstology specialized vocabulary, refers to sample the corrosion degree of depth in per thousand; The former is a weight concept, and the latter is a length concept.
Claims (2)
1. three corrosion experimental provisions of a high pressure low temperature; This device is fixed on the experiment table (1); It is characterized in that: said experimental provision comprises with the confined pressure Cang Gai (14) at the confined pressure storehouse seat (13) of experiment table riveted joint, the present top of rivet clasp and is located at the axial compression servomechanism (8) of the side of covering, storehouse; This confined pressure storehouse seat (13) outside is truncated cone-shaped; Inside is the confined pressure storehouse (10) of hollow cylindrical; Confined pressure Cang Gai (14) is one dull and stereotyped and have the through hole that diameter and specimen finish are complementary, and axial compression servomechanism (8) is made up of two different right cylinders of diameter, tensimeter (6) is housed in the upper diameter large cylinder and passes through pipeline to be communicated with the confined pressure storehouse (10) of below; Also pass an aqueduct (12) in the said axial compression servomechanism (8); Aqueduct one end communicates with confined pressure storehouse (10), and the other end is communicated with outside karst water (2) through temperature controller (5), flow instrument I (4), high-pressure pump (3) successively, and the centre of said experiment table (1) is equipped with flow instrument II (11).
2. one kind is adopted experimental provision as claimed in claim 1 to carry out the method that corrosion is tested, and it is characterized in that comprising step:
1) gets former state water or prepare, the cooling of pressurizeing of the high-pressure pump of flowing through successively (3), flow instrument (4) and temperature controller (5) according to the chemical feature of engineering district karst water;
2) choosing 3 column type cores is sample (7), and with the impurity such as dust on distilled water washed samples surface, the diameter of 3 samples is 20mm, height 30mm;
3) sample is placed on dries 24 hours in the drying baker, claim its weight, note is made W
1, unit: mg;
4) 3 lateral pressure σ that sample applied
1, be respectively 40Mpa, 50Mpa and 60Mpa;
5) 3 levels that sample applied are to confined pressure σ
2=σ
3, be respectively 20Mpa, 30Mpa and 40Mpa;
6) karst water hydraulic pressure is respectively 15Mpa, 25Mpa and 35Mpa;
7) temperature of karst water is controlled at 10 ℃;
8) monitor flow instrument (4) data in real time, when the flow instrument data become big suddenly, should stop test;
9) each sample in confined pressure storehouse (10) test period 24 hours, first sample σ that makes an experiment
1Be 40Mpa, σ
2=σ
3Be 20Mpa, karst water hydraulic pressure is 15Mpa; Second sample σ that makes an experiment
1Be 50Mpa, σ
2=σ
3Be 30Mpa, karst water hydraulic pressure is 25Mpa; The 3rd sample σ that makes an experiment
1Be 60Mpa, σ
2=σ
3Be 40Mpa, karst water hydraulic pressure is 35Mpa;
10) after each test finishes, this sample is put into drying baker dried 24 hours, sweep off floating dust, adopt the per mille scales/electronic balance weighing, the weight that draws three groups of corrosions experiment back samples is remembered respectively and is made W
2, W
3, W
4, unit: mg;
11) get the tail water infiltration water,, calculate calcium carbonate content T through indoor chemical examination
i(i=2,3,4), unit: mg/L;
12) ask for corrosion amount and erosion rate:
Quality corrosion amount a
i=W
1– W
i(i=2,3,4)
Quality erosion rate c
i=(W
1– W
i)/24 (i=2,3,4)
Erosion rate X
i=4E
iT
i/ 100 (i=2,3,4) unit: mm/ thousand; Wherein, E is a depth of erosion, unit: dm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210135924.3A CN102661914B (en) | 2012-05-03 | 2012-05-03 | High-pressure low-temperature triaxial corrosion experimental device and experimental method thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210135924.3A CN102661914B (en) | 2012-05-03 | 2012-05-03 | High-pressure low-temperature triaxial corrosion experimental device and experimental method thereof |
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|---|---|
| CN102661914A true CN102661914A (en) | 2012-09-12 |
| CN102661914B CN102661914B (en) | 2014-06-25 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103728085A (en) * | 2013-12-20 | 2014-04-16 | 国家电网公司 | Uplift pressure measuring device of hydraulic power plant basis gallery |
| CN106153859A (en) * | 2016-06-22 | 2016-11-23 | 福建工程学院 | A kind of rock salt moves assay device and the computational methods of water-soluble erosion |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
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| CN106153859A (en) * | 2016-06-22 | 2016-11-23 | 福建工程学院 | A kind of rock salt moves assay device and the computational methods of water-soluble erosion |
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| Publication number | Publication date |
|---|---|
| CN102661914B (en) | 2014-06-25 |
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