CN102721618B - Uniaxial compression creep test method for saturated and unsaturated rock-soil body - Google Patents

Uniaxial compression creep test method for saturated and unsaturated rock-soil body Download PDF

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Publication number
CN102721618B
CN102721618B CN201210185114.9A CN201210185114A CN102721618B CN 102721618 B CN102721618 B CN 102721618B CN 201210185114 A CN201210185114 A CN 201210185114A CN 102721618 B CN102721618 B CN 102721618B
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China
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sample
valve
water
drainpipe
test
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CN201210185114.9A
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Chinese (zh)
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CN102721618A (en
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李志清
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中国科学院地质与地球物理研究所
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Abstract

The invention discloses a uniaxial compression creep test method for a saturated and unsaturated rock-soil body, which is characterized in that the uniaxial compression creep test for the rock-soil body is carried out by a device. The device mainly comprises a water tank (1), a pressurized framework (2), a dial indicator (4), a pressure chamber (5), a water inlet pipe (6), a water outlet pipe (8), a pressurized shaft (11), an upper drain pipe (12), a water conduit (14), a drift cap (15), an upper porous stone (16), a lower porous stone (18), a base (19), a water measuring pipe (20), a lower drain pipe (23), a pressure chamber base (24), a dead bolt (25), a weight (26), a pressurized lever (30) and the like. The instrument has the advantages of simpleness in manufacture and high measurement precision, can be used for directly measuring the long-term creep compressive strength and the deformation parameter of various soft rocks and hard soils under the saturated and unsaturated condition, and can be used for the indoor and field tests for various soft rocks and hard soils in the civil engineering. The test method is mainly divided into three steps of installing a test sample, making a water filling preparation and loading the test sample.

Description

A kind of saturated unsaturation Rock And Soil uniaxial compression creep test method

Technical field

The present invention is a kind of geotechnological method of testing, belongs to building (ground) field of engineering technology.

Background technology

Chinese scholars is divided into rock mass (rock) and the soil body (soil) geologic body, they become respectively rock mechanics and soil mechanics research object independently separately, under the guiding of this ideological trend, the research of expansive rock and swelled ground is carried out respectively, but along with going deep into of research, each state has all run into a large amount of " rock or not, soil is or not ", the geologic body of " like the non-rock of rock, like native non-soil ".In the international symposium that 1993 hold in Athens, proposed to be different from rock and native concept " soft rock/pan soil ", advocated and specialize in.For this " soft rock/pan soil ", under the test condition of different tests regulation and stipulation, it is very large that the distortion of swelling property ground and intensity index differ, and the modulus that rock test method obtains is equivalent to 9-30 times of soil test result.The long-term creep strength of Rock And Soil and the test of rule thereof problem demanding prompt solution especially particularly.

The reasons such as for a long time, the long-term uniaxial compressive strength that carries out Rock And Soil sample is all to utilize the compression strength value of short-term to replace, and main because single shaft resistance to compression long-term strength test period is longer, and instrument is controlled stable not, and test data discreteness is large.And Chinese scholars is very large to the understanding difference of long-term strength, mainly contain following 4 kinds of schools: 1. long-term strength reduces group, and the scholar who holds this argument is more; 2. long-term strength improves group; 3. the constant group of long-term strength; 4. the indefinite group of long-term strength.The long-term creep shearing strength of soft rock/pan soil will, according to actual conditions, just can be drawn a conclusion by theoretical analysis and experimental test.Under different tests condition, testing the long-term creep strength of soft rock/pan soil, is the basis of carrying out theoretical analysis.At present both at home and abroad also comparatively unripely be used for measuring soft rock/pan soil without single shaft resistance to compression creep test method under confining pressure.This application be exactly to invent a kind of for soft rock/pan soil the single shaft resistance to compression creep test device under state of saturation or unsaturated state condition, be used for testing its creep properties.

Summary of the invention

The object of the invention is to provide a kind of saturated unsaturation Rock And Soil uniaxial compression creep test method, solves the long-term creep of soft rock/pan soil under saturated or unsaturated state and the measurement problem of longtime compressive strength.

Technical solution of the present invention, it is characterized in that utilizing a kind of test unit to carry out saturated unsaturation Rock And Soil uniaxial compression creep test, this device comprises water tank 1, increased pressure frame 2, bolt 3, clock gauge 4, pressure chamber 5, water inlet pipe 6, water inlet pipe valve 7, drainpipe 8, drainpipe valve 9, rotation axis 10, pressuring shaft 11, upper drainpipe 12, upper drainpipe valve 13, aqueduct 14, top cap 15, upper dankness stone 16, sample 17, lower permeable stone 18, base 19, water column 20, aqueduct valve 21, lower drainpipe valve 22, lower drainpipe 23, pressure chamber's base 24, gim peg 25, counterweight 26, large counterweight 27, the first suspension hook 28, the second suspension hook 29, pressurization lever 30.Water tank 1 is connected with pressure chamber's base 24 by water inlet pipe 6, water inlet pipe 6 is controlled by water inlet pipe valve 7, drainpipe 8 is controlled by drainpipe valve 9, upper drainpipe 12 is controlled by upper drainpipe valve 13, lower drainpipe 23 is controlled by lower drainpipe valve 22, pressure chamber 5 is connected with water column 20 by aqueduct 14, aqueduct 14 is controlled by aqueduct valve 21, base 19 is installed lower permeable stone 18 above, above lower permeable stone 18, installation sleeve has the sample 17 of rubber diaphragm, sample 17 is installed permeable stone 16 above, upper dankness stone 16 is installed top cap 15 above, top cap 15 is aimed at pressuring shaft 11, pressuring shaft 11 is connected with increased pressure frame 2 through pressure chamber 5, pressure chamber 5 is connected with pressure chamber's base 24 by bolt 3, clock gauge 4 is installed in pressure chamber 5, increased pressure frame 2 connects by gim peg 25Yu pressure chamber base 24, gim peg 25, large counterweight 27 passes through rotation axis 10 with pressurization lever 30, the first suspension hook 28 connects, pressurization lever 30 is connected by the second suspension hook 29 with counterweight 26.

Advantage of the present invention:

Instrument manufacturing is simple, and measuring accuracy is high, meets Sample consolidation, creep control requirement, can directly measure various soft rocks, pan soil long-term creep compressive strength and the deformation parameter under saturated or operate under unsaturated conditions.

The scope of application of the present invention:

The various soft rocks that can be used for running in civil engineering work, the indoor or on-the-spot test of pan soil, be applicable to measurement saturated without soft rock/pan soil under confining pressure and unsaturation long-term creep compressive strength and deformation parameter.

Accompanying drawing explanation:

Fig. 1 is the structural representation of measuring uniaxial compression creep test method test unit used.Wherein have: water tank 1, increased pressure frame 2, bolt 3, clock gauge 4, pressure chamber 5, water inlet pipe 6, water inlet pipe valve 7, drainpipe 8, drainpipe valve 9, rotation axis 10, pressuring shaft 11, upper drainpipe 12, upper drainpipe valve 13, aqueduct 14, top cap 15, upper dankness stone 16, sample 17, lower permeable stone 18, base 19, water column 20, aqueduct valve 21, lower drainpipe valve 22, lower drainpipe 23, pressure chamber's base 24, gim peg 25, counterweight 26.

Fig. 2 is the A-A right view of Fig. 1.Wherein have: rotation axis 10, gim peg 25, counterweight 26, large counterweight 27, the first suspension hook 28, the second suspension hooks 29, pressurization lever 30.

Embodiment:

Embodiment: as follows for measuring the test method of soft rock/pan soil uniaxial compression distortion:

(1) the creep test method under sample saturation conditions:

1. sample is installed: first sample 17 is bled saturated, and soak upper dankness stone 16 and lower permeable stone 18, then lower permeable stone 18 is placed on base 19, sample after saturated 17 is put to rubber diaphragm to be arranged on lower permeable stone 18, on sample 17, place upper dankness stone 16, upper dankness stone 16 tops add caping cap 15, and with rubber ring fixedly top cap 15 and base 19.

2. water-filling is prepared: pressure chamber 5 is arranged on pressure chamber's base 24, tight a bolt 3, pressuring shaft 11 is aimed to top cap 15, close drainpipe valve 9, open successively aqueduct valve 21, upper drainpipe valve 13 and water inlet pipe valve 7, pressure chamber 5 is full of to water until be full of half water in water column 20, closes water inlet pipe valve 7.

3. sample loads: open lower drainpipe valve 22, by pressuring shaft 11 contact top caps 15, regulate clock gauge 4, according to the saturated uniaxial compressive strength size of sample, place on request counterweight 26, carry out uniaxial loading test, after 24 hours, close lower drainpipe valve 22, throughput water pipe 20 carries out the measurement of sample 17 volume change, measures the axial strain of sample 17 by clock gauge 4, by counterweight 26, obtain pressure at right angle, by timer, calculate test period.

(2) the creep test method under sample operate under unsaturated conditions:

1. sample is installed: the lower permeable stone 18 after soaking is placed on base 19, filter paper on lower permeable stone 18 surface labels, natural sample 17 is put to rubber diaphragm to be arranged on lower permeable stone 18, sample 17 upper surfaces stick filter paper, on filter paper, place the upper dankness stone 16 after soaking, upper dankness stone 16 tops add caping cap 15, and with rubber ring fixedly top cap 15 and base 19.

2. water-filling is prepared: pressure chamber 5 is arranged on pressure chamber's base 24, tight a bolt 3, pressuring shaft 11 is aimed to top cap 15, close successively drainpipe valve 9 and upper drainpipe valve 13, open aqueduct valve 21 and water inlet pipe valve 7, pressure chamber 5 is full of to water until be full of half water in water column 20, closes water inlet pipe valve 7.

3. sample loads: open lower drainpipe valve 22, by pressuring shaft 11 contact top caps 15, regulate clock gauge 4, according to the saturated uniaxial compressive strength size of sample, place on request counterweight 26, carry out uniaxial loading test, after 24 hours, close lower drainpipe valve 22, throughput water pipe 20 carries out the measurement of sample 17 volume change, measures the axial strain of sample 17 by clock gauge 4, by counterweight 26, obtain pressure at right angle, by timer, calculate test period.

Claims (1)

1. a saturated unsaturation Rock And Soil uniaxial compression creep test method, it is characterized in that utilizing a kind of test unit to carry out the test of the saturated unsaturation uniaxial compression of Rock And Soil creep, this device comprises water tank (1), increased pressure frame (2), bolt (3), clock gauge (4), pressure chamber (5), water inlet pipe (6), water inlet pipe valve (7), drainpipe (8), drainpipe valve (9), rotation axis (10), pressuring shaft (11), upper drainpipe (12), upper drainpipe valve (13), aqueduct (14), top cap (15), upper dankness stone (16), sample (17), lower permeable stone (18), base (19), water column (20), aqueduct valve (21), lower drainpipe valve (22), lower drainpipe (23), pressure chamber's base (24), gim peg (25), counterweight (26), large counterweight (27), the first suspension hook (28), the second suspension hook (29), pressurization lever (30), the method of utilizing this device to test is as follows:
(I) the uniaxial compression creep test method under sample saturation conditions:
1. sample is installed: first sample (17) is bled saturated, and soak upper dankness stone (16) and lower permeable stone (18), then lower permeable stone (18) is put on base (19), sample after saturated (17) is put to rubber diaphragm to be arranged on lower permeable stone (18), the upper upper dankness stone (16) of placing of sample (17), upper dankness stone (16) top adds caping cap (15), and with rubber ring fixedly top cap (15) and base (19)
2. water-filling is prepared: pressure chamber (5) are arranged on pressure chamber's base (24), (3) tight a bolt, pressuring shaft (11) is aimed to top cap (15), close drainpipe valve (9), open successively aqueduct valve (21), upper drainpipe valve (13) and water inlet pipe valve (7), pressure chamber (5) are full of to water until be full of half water in water column (20), close water inlet pipe valve (7)
3. sample loads: open lower drainpipe valve (22), by pressuring shaft (11) contact top cap (15), regulate clock gauge (4), according to the saturated uniaxial compressive strength size of sample, place on request counterweight (26), carry out uniaxial loading test, after 24 hours, close lower drainpipe valve (22), throughput water pipe (20) carries out the measurement of sample (17) volume change, by clock gauge (4), measure the axial strain of sample (17), by counterweight (26), obtain pressure at right angle, by timer, calculate test period
(II) the uniaxial compression creep test method under sample operate under unsaturated conditions:
1. sample is installed: the lower permeable stone (18) after soaking is put on base (19), filter paper on lower permeable stone (18) surface label, sample (17) is put to rubber diaphragm to be arranged on lower permeable stone (18), sample (17) upper surface sticks filter paper, on filter paper, place the upper dankness stone (16) after soaking, upper dankness stone (16) top adds caping cap (15), and with rubber ring fixedly top cap (15) and base (19)
2. water-filling is prepared: pressure chamber (5) are arranged on pressure chamber's base (24), (3) tight a bolt, pressuring shaft (11) is aimed to top cap (15), close successively drainpipe valve (9) and upper drainpipe valve (13), open aqueduct valve (21) and water inlet pipe valve (7), pressure chamber (5) are full of to water until be full of half water in water column (20), close water inlet pipe valve (7)
3. sample loads: open lower drainpipe valve (22), by pressuring shaft (11) contact top cap (15), regulate clock gauge (4), according to the saturated uniaxial compressive strength size of sample, place on request counterweight (26), carry out uniaxial loading test, after 24 hours, close lower drainpipe valve (22), throughput water pipe (20) carries out the measurement of sample (17) volume change, by clock gauge (4), measure the axial strain of sample (17), by counterweight (26), obtain pressure at right angle, by timer, calculate test period.
CN201210185114.9A 2012-06-06 2012-06-06 Uniaxial compression creep test method for saturated and unsaturated rock-soil body CN102721618B (en)

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CN102944481A (en) * 2012-12-14 2013-02-27 重庆大学 Geotechnique test piece dry-wet cycle test device under loaded action
CN104020273A (en) * 2013-03-01 2014-09-03 中国地质科学院水文地质环境地质研究所 Ultrahigh pressure consolidation test device and method
CN104634714A (en) * 2013-11-13 2015-05-20 中国石油天然气集团公司 Impact osmometer and operating method
CN103940976B (en) * 2014-03-24 2016-03-16 中国地震局地壳应力研究所 For the high leakproofness pressure vessel of rock fracture seepage flow microseism test
CN104849193A (en) * 2015-05-25 2015-08-19 上海交通大学 Device and method for measuring permeability coefficient of cement-soil
CN105070176B (en) * 2015-07-16 2017-08-11 河海大学 A kind of multifunctional soil reclaimed water exercise effect teaching demonstration device and test method
CN106568622B (en) * 2016-10-12 2019-10-25 河海大学 For the water saturated experimental rig of high-intensitive rock sample positive pressure and application method
CN108593703A (en) * 2018-04-08 2018-09-28 中国矿业大学(北京) The recognition methods of aqueous ground unsaturation-saturation state transformation and its verification system
CN109030315B (en) * 2018-08-22 2020-11-27 福州大学 Low-stress initial one-dimensional compression-penetration test system and working method thereof
CN109030182B (en) * 2018-09-04 2020-04-28 大连理工大学 Saturated clay sample strength and strain softening parameter measuring device based on full-flow sounding

Citations (3)

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Publication number Priority date Publication date Assignee Title
US5219388A (en) * 1992-01-17 1993-06-15 University Of Florida Method and apparatus for testing water permeability of concrete
CN1766544A (en) * 2005-11-08 2006-05-03 河海大学 Method for testing rheology characteristics of soil and three-axial rheometer
CN102323159A (en) * 2011-08-12 2012-01-18 河海大学 Permeameter for contact surface of soil and works at high stress, high hydraulic gradient, and large shear deformation

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5219388A (en) * 1992-01-17 1993-06-15 University Of Florida Method and apparatus for testing water permeability of concrete
CN1766544A (en) * 2005-11-08 2006-05-03 河海大学 Method for testing rheology characteristics of soil and three-axial rheometer
CN102323159A (en) * 2011-08-12 2012-01-18 河海大学 Permeameter for contact surface of soil and works at high stress, high hydraulic gradient, and large shear deformation

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