CN108287124A - The hole water soluble salt content memory characteristic test method of cohesive soil under drying and watering cycle - Google Patents
The hole water soluble salt content memory characteristic test method of cohesive soil under drying and watering cycle Download PDFInfo
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- CN108287124A CN108287124A CN201810133407.XA CN201810133407A CN108287124A CN 108287124 A CN108287124 A CN 108287124A CN 201810133407 A CN201810133407 A CN 201810133407A CN 108287124 A CN108287124 A CN 108287124A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N13/00—Investigating surface or boundary effects, e.g. wetting power; Investigating diffusion effects; Analysing materials by determining surface, boundary, or diffusion effects
Abstract
The invention discloses a kind of hole water soluble salt content memory characteristic test methods of cohesive soil under drying and watering cycle, one, it is tested by the pinhole test of conventional criteria, broken soil test, the experiment of hole water soluble salt and double hydrometer method comprehensive identifications, typical dispersive clay disturbed sample is chosen, test soil sample is made；Two, carry out the test soil sample hole water soluble salt dispersibility qualification test；Three, wet, dry cyclic test is carried out to test soil sample；Four, the dispersed qualification result of the dispersed qualification result described in comparative analysis second step and air-dried sample described in third step；Five, repairing experiment data study the memory characteristic of the hole water soluble salt content of the dispersive clay disturbed sample under wet, dry cycling condition.The variation characteristic and trend for taking specific Test Research clay hole water soluble salt content of the invention, technical support is provided for the safe operation mode of the engineerings such as reservoir dam dyke.
Description
Technical field
The present invention relates to geotechnical engineering fields, contain more particularly, to the hole water soluble salt of cohesive soil under the conditions of drying and watering cycle
Measure memory characteristic test method.
Background technology
Dispersed cohesive soil distribution is wide, and wprks are strong, and difficulty of governance is big, and clay dispersibility is tested in geotechnical engineering
It is indispensable.There is the engineering accident event report caused by the dispersibility of soil both at home and abroad.Currently, both at home and abroad to cohesive soil point
There are many research for dissipating property qualification test method and dispersive mechanism, and there is also more cognitive dissonances.But dispersed water is managed
The experimental study of memory characteristic yet there are no report.However, the soil body has Memorability, especially mechanics special in terms of certain characteristics
Sign, has obtained the approval of industry.In Practical Project, for earth and rockfill dam, especially homogeneous earth dam, upstream water level is year after year
Ground causes dam body soil to be influenced for a long time by dry, wet cycle period condition with the variation up and down in season or time.If
Can have to the water reason memory of soil and clearly recognize, can clearly instruct engineering application, subtract under the premise of the dispersion mechanism of soil understanding
The occurrence probability of few engineering accident, provides for social safety and mitigation beneficial to help.Dispersive soil is clay in low saline salinity water
Cohesive strength between middle fine grained largely disappear or all disappear, in granule self-dispersing existing for aggregate at simple
The soil of clay particle.This soil self-dispersing power is strong, erosion resistance is very low, easily causes the dykes and dams soil body gradually to disperse, piping
Deng phenomena such as can further resulting in the unstabilitys such as engineering, roadbed or destroy.It is main at present for the engineering treatment of dispersive soil
There are the methods of water quality transformation, soil improvement, engineering isolation and anti-filter measure, but above-mentioned measure all has some disadvantages, such as
Low dissolved salt library water is transformed into high dissolved salt library water by water quality transformation, and to improve the dispersibility of the soil body, this method changes water quality, right
Surrounding enviroment pollute；Soil improvement theory is feasible, but not easy to operate in construction, and homogeneity is difficult to realize, quality is difficult to
Ensure；Engineering is isolated and anti-filter measure investment is big, and is difficult to carry out to built engineering.
Invention content
Present invention aims at the hole water soluble salt content memory characteristic experiments of cohesive soil under a kind of drying and watering cycle of offer
Method, the characteristics of for dispersive soil and the problem of project treatment, incorporation engineering actual motion condition pass through the hole for studying soil
Water soluble salt content memory characteristic obtains the relationship of the power and drying moistening cycle of dispersibility, to change to be simple, economical
The method and project treatment of the dispersibility of kind cohesive soil provide technical support.
To achieve the above object, the present invention takes following technical proposals：
The hole water soluble salt content memory characteristic test method of cohesive soil under drying and watering cycle of the present invention, as steps described below
It carries out：
The first step chooses test specimen：
It is tested by the pinhole test of conventional criteria, broken soil test, the experiment of hole water soluble salt and double hydrometer method comprehensive identifications,
Typical dispersive clay disturbed sample is chosen, is pulverized after air-drying, test soil sample is made in the round-hole mesh for crossing 0.5mm, spare；
Second step carries out the test soil sample hole water soluble salt dispersibility qualification test：
The test soil sample in the first step is taken, appropriate distilled water is added, test soil sample is mixed and stirred with the distilled water close to liquid limit
Degree, using have filter plant water vacuum extract out hole water sample, measure calcium, magnesium, sodium, the potassium in the hole water sample
Four kinds of metal cations, calculate the total amount of the metal cation, and find out the percentage of wherein sodium ions content, use pore water
The dispersibility of the percentage differential test soil sample of metal cation total amount and sodium ions content in sample；
Third step carries out wet, dry cyclic test to test soil sample：
It takes and tests soil sample in the first step and be placed in porcelain dish, add water not have the immersion of test soil sample, then air-dry at normal temperatures and complete the
Primary wet, dry cycle；Then, the air-dried test soil sample after wet, the dry cycle described for the first time is subjected to second of wet, dry cycle；
It repeats the above process, so impregnates, air-dries to wet, the dry cycle-index of setting, the air-dried survey of last time is wet, dry cycle
Examination soil sample is taken out from the porcelain dish pulverizes, and air-dried sample is made in the round-hole mesh for crossing 0.5mm, then according to second step to the wind
Dry sample carries out hole water soluble salt dispersibility qualification test；
The dispersibility of dispersed qualification result and air-dried sample described in third step described in 4th step, comparative analysis second step
Qualification result judges the dispersibility of air-dried sample described in the first step with the variation of wet, dry cycle-index, until testing soil sample
Dispersibility is substantially unchanged, stops experiment；
5th step, repairing experiment data analyze test result, judge DIFFERENT WET, dry cycle-index to test soil sample dispersibility
It influences, realization is wet, the memory of the hole water soluble salt content of the dispersive clay disturbed sample is special under dry cycling condition
Property.
In third step, test soil sample in the first step is taken to be placed in porcelain dish, adds water not have test soil sample to impregnate 10 hours ~ 12 small
When, it then air-dries at normal temperatures and completes wet for the first time, dry cycle.
The invention has the advantages that incorporation engineering actual motion condition, passes through the water in wet, the dry circulating analog engineering of soil sample
Position ascending, descending mechanical periodicity, take Test Research clay hole water soluble salt content of the invention specific variation characteristic and
Trend provides new method foundation for the project treatment that dispersive soil is built a dam.So that by artificially control dry and wet condition variation come
Processing dispersibility is possibly realized, and technical support is provided for the safe operation mode of the engineerings such as reservoir dam dyke.
Specific implementation mode
The hole water soluble salt content memory characteristic test method of cohesive soil under drying and watering cycle of the present invention, according to following
Step carries out：
The first step chooses test specimen：
It is tested by the pinhole test of conventional criteria, broken soil test, the experiment of hole water soluble salt and double hydrometer method comprehensive identifications,
Typical dispersive clay disturbed sample is chosen, is ground with wood after air-drying and is pulverized on rubber matting, the round-hole mesh for crossing 0.5mm is made
Soil sample is tested, it is spare；
Second step carries out the test soil sample hole water soluble salt dispersibility qualification test：
The test soil sample in the first step is taken, appropriate distilled water is added, test soil sample is mixed and stirred with the distilled water close to liquid limit
Degree, using have filter plant water vacuum extract out hole water sample, measure calcium, magnesium, sodium, the potassium in the hole water sample
Four kinds of metal cations, calculate the total amount of the metal cation, and find out the percentage of wherein sodium ions content, use pore water
The dispersibility of the percentage differential test soil sample of metal cation total amount and sodium ions content in sample；
Third step carries out wet, dry cyclic test to test soil sample：
It takes test soil sample in the first step to be placed in porcelain dish, adds water not have test soil sample to impregnate 10 hours ~ 12 hours, then in room temperature
Leeward finishes into wet for the first time, dry cycle；Then, the air-dried test soil sample after wet, the dry cycle described for the first time is carried out second
Secondary wet, dry cycle；It repeats the above process, so impregnates, air-dries to wet, the dry cycle-index of setting, it will be wet, dry for the last time
The air-dried test soil sample of cycle is taken out from the porcelain dish, is ground with wood and is pulverized on rubber matting, and the round-hole mesh for crossing 0.5mm is made
Then air-dried sample carries out hole water soluble salt dispersibility qualification test according to second step to the air-dried sample；
The dispersibility of dispersed qualification result and air-dried sample described in third step described in 4th step, comparative analysis second step
Qualification result judges the dispersibility of air-dried sample described in the first step with the variation of wet, dry cycle-index, until testing soil sample
Dispersibility is substantially unchanged, stops experiment；
5th step, repairing experiment data analyze test result, judge DIFFERENT WET, dry cycle-index to test soil sample dispersibility
It influences, realization is wet, the memory of the hole water soluble salt content of the dispersive clay disturbed sample is special under dry cycling condition
Property.
Claims (2)
1. the hole water soluble salt content memory characteristic test method of cohesive soil under a kind of drying and watering cycle, it is characterised in that：According to
Following step carries out：
The first step chooses test specimen：
It is tested by the pinhole test of conventional criteria, broken soil test, the experiment of hole water soluble salt and double hydrometer method comprehensive identifications,
Typical dispersive clay disturbed sample is chosen, is pulverized after air-drying, test soil sample is made in the round-hole mesh for crossing 0.5mm, spare；
Second step carries out the test soil sample hole water soluble salt dispersibility qualification test：
The test soil sample in the first step is taken, appropriate distilled water is added, test soil sample is mixed and stirred with the distilled water close to liquid limit
Degree, using have filter plant water vacuum extract out hole water sample, measure calcium, magnesium, sodium, the potassium in the hole water sample
Four kinds of metal cations, calculate the total amount of the metal cation, and find out the percentage of wherein sodium ions content, use pore water
The dispersibility of the percentage differential test soil sample of metal cation total amount and sodium ions content in sample；
Third step carries out wet, dry cyclic test to test soil sample：
It takes and tests soil sample in the first step and be placed in porcelain dish, add water not have the immersion of test soil sample, then air-dry at normal temperatures and complete the
Primary wet, dry cycle；Then, the air-dried test soil sample after wet, the dry cycle described for the first time is subjected to second of wet, dry cycle；
It repeats the above process, so impregnates, air-dries to wet, the dry cycle-index of setting, the air-dried survey of last time is wet, dry cycle
Examination soil sample is taken out from the porcelain dish pulverizes, and air-dried sample is made in the round-hole mesh for crossing 0.5mm, then according to second step to the wind
Dry sample carries out hole water soluble salt dispersibility qualification test；
The dispersibility of dispersed qualification result and air-dried sample described in third step described in 4th step, comparative analysis second step
Qualification result judges the dispersibility of air-dried sample described in the first step with the variation of wet, dry cycle-index, until testing soil sample
Dispersibility is substantially unchanged, stops experiment；
5th step, repairing experiment data analyze test result, judge DIFFERENT WET, dry cycle-index to test soil sample dispersibility
It influences, realization is wet, the memory of the hole water soluble salt content of the dispersive clay disturbed sample is special under dry cycling condition
Property.
2. according to claim 1 under drying and watering cycle cohesive soil hole water soluble salt content memory characteristic test method,
It is characterized in that：In third step, takes test soil sample in the first step to be placed in porcelain dish, water is added not have test soil sample to impregnate 10 hours ~ 12
Hour, it then air-dries at normal temperatures and completes wet for the first time, dry cycle.
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| CN201810133407.XA CN108287124A (en) | 2018-02-09 | 2018-02-09 | The hole water soluble salt content memory characteristic test method of cohesive soil under drying and watering cycle |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101596490A (en) * | 2008-06-05 | 2009-12-09 | 中国矿业大学(北京) | A kind of dried, the integrated ore-dressing technique of wet method of diatomite ore |
| CN104876480A (en) * | 2015-05-11 | 2015-09-02 | 西南科技大学 | Special anti-cracking bentonite-based composite drill hole backfill material for ground source heat pump |
| CN106582576A (en) * | 2016-12-31 | 2017-04-26 | 天津汉晴环保科技有限公司 | Heavy metal ion adsorption type hybrid hollow fiber film and production method thereof |
| CN106637522A (en) * | 2016-10-19 | 2017-05-10 | 南通大学 | High-dispersion PAN (polyacrylonitrile) fiber for asphalt concrete and method for preparing high-dispersion PAN fiber |
| CN106644805A (en) * | 2016-10-17 | 2017-05-10 | 吉林大学 | Combined determination device and method for combined water content of soft clay |
-
2018
- 2018-02-09 CN CN201810133407.XA patent/CN108287124A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101596490A (en) * | 2008-06-05 | 2009-12-09 | 中国矿业大学(北京) | A kind of dried, the integrated ore-dressing technique of wet method of diatomite ore |
| CN104876480A (en) * | 2015-05-11 | 2015-09-02 | 西南科技大学 | Special anti-cracking bentonite-based composite drill hole backfill material for ground source heat pump |
| CN106644805A (en) * | 2016-10-17 | 2017-05-10 | 吉林大学 | Combined determination device and method for combined water content of soft clay |
| CN106637522A (en) * | 2016-10-19 | 2017-05-10 | 南通大学 | High-dispersion PAN (polyacrylonitrile) fiber for asphalt concrete and method for preparing high-dispersion PAN fiber |
| CN106582576A (en) * | 2016-12-31 | 2017-04-26 | 天津汉晴环保科技有限公司 | Heavy metal ion adsorption type hybrid hollow fiber film and production method thereof |
Non-Patent Citations (3)
| Title |
|---|
| 巨娟丽: "粘性土分散性鉴定试验研究", 《中国优秀硕士学位论文全文数据库工程科技Ⅱ辑》 * |
| 易亮: "红黏土土水特征及湿化特性试验研究", 《中国优秀硕士学位论文全文数据库工程科技Ⅱ辑》 * |
| 曾召田: "膨胀土干湿循环效应与微观机制研究", 《中国优秀硕士学位论文全文数据库工程科技Ⅱ辑》 * |
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Application publication date: 20180717 |