CN102661914B - 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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- CN102661914B CN102661914B CN201210135924.3A CN201210135924A CN102661914B CN 102661914 B CN102661914 B CN 102661914B CN 201210135924 A CN201210135924 A CN 201210135924A CN 102661914 B CN102661914 B CN 102661914B
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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 a kind of high pressure low temperature three axle corrosion experimental provision and experimental techniques thereof.Be applicable to the underground workss such as Hydraulic and Hydro-Power Engineering, traffic, mine.
Background technology
According to the karst development characteristics in Project Areas and the needs of project construction, especially as hypogee, dam foundation, access tunnel or other Rock And Soil (comprise artificial material, as concrete), owing to suffering for a long time high pressure seepage flow, corrosion, severe nature and the impact of running environment such as wash away, the direction that causes Rock And Soil overall characteristic As time goes on to weaken to its function and security changes.Water and the Rock And Soil interaction long-term existence of bearing high pressure, cause that border country rock produces microfissure and many coupling effects damage, and the freezing effect of low temperature especially has in addition been accelerated the speed of its reduction undoubtedly.Above aspect all easily causes the problem such as reduce of country rock physico-mechanical properties, and, along with the increase at operation age, country rock can occur aging gradually.Engineering higher-pressure region Rock And Soil endurance issues is one of focal issue of countries in the world engineering circles common concern all the time.So far, to karst region, under the seepage flow condition of high pressure low temperature, the corrosion characteristics to rock mass and corrosion depth research relatively lack.
Summary of the invention
The technical problem to be solved in the present invention is: for the problem of above-mentioned existence, a kind of simple in structure, easy to operate high pressure low temperature three axle corrosion experimental provision and experimental techniques thereof are provided, provide experimental basis and basic data for being familiar with exactly deep karst development characteristics, and provide scientific basis for necessary engineering support measure of later stage.
The technical solution adopted in the present invention is: high pressure low temperature three axle corrosion experimental provisions, this device is fixed on experiment table, it is characterized in that: described experimental provision comprises the confined pressure storehouse seat with experiment table riveted joint, the confined pressure Cang Gai at the present top of rivet clasp and be located at the axial compression servomechanism of the storehouse side of covering, this seat outside, confined pressure storehouse is truncated cone-shaped, inside is the confined pressure storehouse of hollow cylindrical, confined pressure Cang Gai is one dull and stereotyped and have a through hole that diameter and specimen finish match, axial compression servomechanism is made up of two different right cylinders of diameter, tensimeter is housed in upper diameter large cylinder and is communicated with the confined pressure storehouse of below by pipeline, in described axial compression servomechanism, also pass an aqueduct, aqueduct one end communicates with confined pressure storehouse, the other end passes through temperature controller successively, flow instrument I, high-pressure pump is communicated with outside karst water, the centre of described experiment table is provided with flow instrument II.
The method that adopts high pressure low temperature three axle corrosion experimental provisions to carry out corrosion experiment, is characterized in that comprising step:
1) get former state water or prepare according to the chemical feature of Project Areas karst water, the cooling of pressurizeing of the high-pressure pump of flowing through successively, flow instrument and temperature controller;
2) impurity such as choosing 3 column type cores is sample, the dust on use distilled water washed samples surface, the diameter of 3 samples is 20mm, height 30mm;
3) sample is placed in drying baker and dries 24 hours, claim its weight, be denoted as W
1, unit: mg;
4) 3 lateral pressure σ that sample applies
1, be respectively 40Mpa, 50Mpa and 60Mpa;
5) level that 3 samples apply is 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 in real time flow instrument data, in the time that flow instrument data become suddenly large, should stop test;
9) each sample was confined pressure storehouse test period 24 hours, and first sample is tested σ
1for 40Mpa, σ
2=σ
3for 20Mpa, karst water hydraulic pressure is 15Mpa; Second sample tested σ
1for 50Mpa, σ
2=σ
3for 30Mpa, karst water hydraulic pressure is 25Mpa; The 3rd sample tested σ
1for 60Mpa, σ
2=σ
3for 40Mpa, karst water hydraulic pressure is 35Mpa;
10) after each test, this sample is put into drying baker and dry 24 hours, sweep off floating dust, adopt per mille scales/electronic balance weighing, show that the weight of three groups of rear samples of corrosion experiment is denoted as respectively W
2, W
3, W
4, unit: mg;
11) get tail water infiltration water, through indoor chemical examination, calculate calcium carbonate content T
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 depth of erosion, unit: dm.
The invention has the beneficial effects as follows: this experimental provision is simple in structure, easy to operate, by the experiment of 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 dissolve corrosion rule and the corrosion impact on rock mass sample; Grasp the solution corrosion process of carbonatite inside under the water under high pressure infiltration condition of underground deep and cryogenic high pressure state simultaneously, to remove the potential danger of engineering, and provide scientific basis for follow-up mechanical test.
Accompanying drawing explanation
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
As shown in Figure 1 and Figure 2, the present embodiment is a kind of high pressure low temperature three axle corrosion experimental provisions, 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 experiment table 1 through rivet 9, and top and confined pressure storehouse lid 14 are fixing.Seat 13 outsides, described confined pressure storehouse are truncated cone-shaped, and inside is the confined pressure storehouse 10 of hollow cylindrical, in confined pressure storehouse 10 for placing test specimens, and can apply level to confined pressure σ to sample
2, σ
3.Described confined pressure storehouse lid 14 is a flat board, and heart position has the through hole that diameter and specimen finish match therein.Apply lateral pressure σ corresponding to the through hole on confined pressure storehouse lid 14, the interior sample in confined pressure storehouse 10 below the storehouse side of covering installation axial compression servomechanism 8(gives
1), both are through rivet 9 rivet clasps.Tensimeter 6 is housed on axial compression servomechanism 8 and is communicated with the confined pressure storehouse 10 of below by pipeline, in this axial compression servomechanism, be also provided with an aqueduct 12, aqueduct one end (water delivering orifice) communicates with confined pressure storehouse 10, the other end is communicated with outside karst water 2 by temperature controller 5, flow instrument I 4, high-pressure pump 3 successively, and karst water is imported in this experimental provision after pressurization cooling is processed.
The method that adopts high pressure low temperature three axle corrosion experimental provisions to test in the present embodiment is as follows:
1) get former state water or prepare according to the chemical feature of Project Areas karst water, considering 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 process;
2) impurity such as choosing 3 column type cores is sample 7, the dust on use distilled water washed samples surface, the diameter of 3 samples is 20mm, height 30mm;
3) sample is placed in drying baker and dries 24 hours, claim its weight, be denoted as W
1, unit: mg;
4) 3 lateral pressure σ that sample applies
1, be respectively 40Mpa, 50Mpa and 60Mpa;
5) level that 3 samples apply is 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 in real time flow instrument 4 data, in the time that flow instrument data become suddenly large, should stop test, excessive with waterproofing pressure, cause sample hydraulic fracture, cause test failure;
9) each sample was confined pressure storehouse 10 test period 24 hours, and first sample is tested σ
1for 40Mpa, σ
2=σ
3for 20Mpa, karst water hydraulic pressure is 15Mpa; Second sample tested σ
1for 50Mpa, σ
2=σ
3for 30Mpa, karst water hydraulic pressure is 25Mpa; The 3rd sample tested σ
1for 60Mpa, σ
2=σ
3for 40Mpa, karst water hydraulic pressure is 35Mpa;
10) after each test, this sample is put into drying baker and dry 24 hours, sweep off floating dust, adopt per mille scales/electronic balance weighing, show that the weight of three groups of rear samples of corrosion experiment is denoted as respectively W
2, W
3, W
4, unit: mg;
11) get tail water infiltration water (via the centre of experiment table, the water that flow instrument II flows out being installed, is test karst water later), through indoor chemical examination, draw calcium ion concentration, calculate calcium carbonate content T by chemical equation
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 depth of erosion, can obtain by apparatus measures unit: dm.
Quality erosion rate refers to the overall loss percentage of (being generally per hour) test specimen in the unit interval; Erosion rate is karstology specialized vocabulary, refers to the sample corrosion depth of every thousand; The former is weight concept, and the latter is length concept.
Claims (1)
1. a method that adopts high pressure low temperature three axle corrosion experimental provisions to carry out corrosion experiment, this device is fixed on experiment table (1), described experimental provision also comprises the confined pressure storehouse seat (13) with experiment table riveted joint, the confined pressure Cang Gai (14) at the present top of rivet clasp and be located at the axial compression servomechanism (8) of the storehouse side of covering, 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 a through hole that diameter and specimen finish match, axial compression servomechanism (8) is made up of two different right cylinders of diameter, in the larger right cylinder of upper diameter, tensimeter (6) is housed and is communicated with the confined pressure storehouse (10) of below by pipeline, in described axial compression servomechanism (8), also pass an aqueduct (12), aqueduct one end communicates with confined pressure storehouse (10), the other end is successively by temperature controller (5), flow instrument I (4), high-pressure pump (3) is communicated with outside karst water (2), the centre of described experiment table (1) is provided with flow instrument II (11),
It is characterized in that this experimental technique comprises step:
1) get former state water or prepare according to the chemical feature of Project Areas karst water, the cooling of pressurizeing of the high-pressure pump of flowing through successively (3), flow instrument (4) and temperature controller (5);
2) impurity such as choosing 3 column type cores is sample (7), the dust on use distilled water washed samples surface, the diameter of 3 samples is 20mm, height 30mm;
3) sample is placed in drying baker and dries 24 hours, claim its weight, be denoted as W
1, unit: mg;
4) 3 lateral pressure σ that sample applies
1, be respectively 40Mpa, 50Mpa and 60Mpa;
5) level that 3 samples apply is 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 in real time flow instrument (4) data, in the time that flow instrument data become suddenly large, should stop test;
9) each sample was confined pressure storehouse (10) test period 24 hours, and first sample is tested σ
1for 40Mpa, σ
2=σ
3for 20Mpa, karst water hydraulic pressure is 15Mpa; Second sample tested σ
1for 50Mpa, σ
2=σ
3for 30Mpa, karst water hydraulic pressure is 25Mpa; The 3rd sample tested σ
1for 60Mpa, σ
2=σ
3for 40Mpa, karst water hydraulic pressure is 35Mpa;
10) after each test, this sample is put into drying baker and dry 24 hours, sweep off floating dust, adopt per mille scales/electronic balance weighing, show that the weight of three groups of rear samples of corrosion experiment is denoted as respectively W
2, W
3, W
4, unit: mg;
11) get tail water infiltration water, through indoor chemical examination, calculate calcium carbonate content T
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 depth of erosion, unit: dm.
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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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| 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 CN102661914A (en) | 2012-09-12 |
| CN102661914B true CN102661914B (en) | 2014-06-25 |
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| 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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| DE102006009502B3 (en) * | 2006-02-27 | 2007-08-30 | Framatome Anp Gmbh | Method for testing a fuel rod cladding tube and associated device |
| EP1887341A1 (en) * | 2006-08-01 | 2008-02-13 | Institute of Nuclear Energy Research Atomic Energy Council, Executive Yuan | Method and system for producing stress corrosion cracking |
| CN201615870U (en) * | 2010-01-21 | 2010-10-27 | 三峡大学 | Experimental instrument simulating water-rock interaction mechanism in reservoir water pressure state |
| CN101819132B (en) * | 2010-04-09 | 2012-05-23 | 重庆大学 | Method for realizing rock salt dissolving characteristic test under triaxial stress condition |
| CN102279150B (en) * | 2011-06-23 | 2013-05-22 | 长安大学 | Road material corrosion testing machine |
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| CN202189000U (en) * | 2011-07-14 | 2012-04-11 | 中国科学院武汉岩土力学研究所 | High-temperature fractured rock mass penetration testing device |
| CN202562835U (en) * | 2012-05-03 | 2012-11-28 | 中国水电顾问集团华东勘测设计研究院 | High-pressure low-temperature three-axis corrosion experimental device |
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