CN103242029A - Similar material for simulating expansive soil tunnel surrounding rock in model test and preparation method thereof - Google Patents
Similar material for simulating expansive soil tunnel surrounding rock in model test and preparation method thereof Download PDFInfo
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- CN103242029A CN103242029A CN201310164796XA CN201310164796A CN103242029A CN 103242029 A CN103242029 A CN 103242029A CN 201310164796X A CN201310164796X A CN 201310164796XA CN 201310164796 A CN201310164796 A CN 201310164796A CN 103242029 A CN103242029 A CN 103242029A
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Abstract
The invention relates to a similar material for simulating expansive soil tunnel surrounding rock in a model test and a preparation method thereof. According to the similar material, clay and bentonite, which pass through a 4.75mm sieve, serve as main raw materials, the materials are proportioned by a weight part ratio according to different expansion levels, weak expansive soil is prepared from 100 parts of clay and not less than 2 and less than 10 parts of bentonite, medium expansive soil is prepared from 100 parts of clay and not less than 10 and less than 22 parts of bentonite, strong expansive soil is prepared from 100 parts of clay and not less than 22 and less than 30 parts of bentonite, water is added to the mixed materials, and compaction molding is carried out so as to prepare the similar material. According to the similar material and the preparation method, expansive soil with different free expansion ratios can be prepared so as to carry out the model test, so that the mechanical and deformation characteristics of the expansive soil surrounding rock can be met, the raw materials can be obtained locally, the operation is simple and convenient, and the resource utilization ratio is increased.
Description
Technical field
The present invention relates to a kind of analog material of simulating the swelling soil tunnel surrounding for model trial and preparation method thereof.
Background technology
At present, in Tunnel Engineering was built, the country rock in more tunnel had certain swelling property, and undisturbed soil is transported to the destruction that can cause in the process in laboratory to a certain degree, its original mechanical property and deformation behaviour also can change accordingly, and the cost that fetches earth at a distance is higher; But the existing stage does not have the analog material that a kind of method can be used for simulation swelling soil tunnel surrounding.
Summary of the invention
The objective of the invention is to overcome the prior art deficiency, and a kind of analog material for model trial simulation swelling soil tunnel surrounding and preparation method thereof is provided, can not only gather materials on the spot, improve resource utilization, and can satisfy mechanics and the deformation characteristic of swelling soil country rock.
The technical scheme that the present invention takes is:
A kind of analog material for model trial simulation swelling soil tunnel surrounding, so that clay and the wilkinite of 4.75mm sieve are main raw material excessively, according to different inflation level by weight than batching, weak swelling soil: 100 parts of clays, wilkinite more than or equal to 2 parts less than 10 parts; Medium swelling soil: 100 parts of clays, wilkinite more than or equal to 10 parts less than 22 parts; Strong swelling soil: 100 parts of clays, wilkinite more than or equal to 22 parts less than 30 parts.
A kind of preparation method of the analog material for model trial simulation swelling soil tunnel surrounding comprises that step is as follows:
(1) test raw material clay and wilkinite are crossed the sieve of 4.75mm;
(2) according to the swelling soil analog material inflation level of actual computation confirmed test needs;
(3) select corresponding raw material weight proportioning by the grade of determining: weak swelling soil: 100 parts of clays, wilkinite more than or equal to 2 parts less than 10 parts; Medium swelling soil: 100 parts of clays, wilkinite more than or equal to 10 parts less than 22 parts; Strong swelling soil: 100 parts of clays, wilkinite more than or equal to 22 parts less than 30 parts;
(4) material loading and stirring make material mixing even;
(5) raw material initial aqueous rate and the needed water ratio of model trial are calculated in contrast, add water to the design water ratio in the material that stirs;
(6) according to the compaction Control way to the moulding of model trial material compaction.
Swelling soil be a kind of be the cohesive soil of essential mineral composition with montmorillonite, illite, have that water-swellable, dehydration shrink feature, be a kind of clay matter of special expansion texture; And the rock that wilkinite mainly is made up of montmorillonite, its swelling property is high.Analog material of the present invention can be regulated smectite content to control its swelling capacity by wilkinite, can satisfy the Other Engineering mechanical property of swelling soil again, as expansion potentiality, no lotus rate of expansion, lotus rate of expansion, bulging force etc. are arranged.
The invention has the beneficial effects as follows, can proportioning the swelling soil of different degree of free swelling carry out model trial, can not only satisfy mechanics and the deformation characteristic of swelling soil country rock, can gather materials on the spot, simple and convenient, improve resource utilization.
Embodiment
Further specify below in conjunction with embodiment.
Embodiment 1
A kind of preparation method of the analog material for model trial simulation swelling soil tunnel surrounding, step:
(1) test raw material clay and wilkinite are crossed the sieve of 4.75mm; (2) determine the desired degree of free swelling 38% of model trial material; (3) 100 parts of clays by weight ratio, 2 parts of wilkinites free rate of expansion be 38%; (4) material loading and stirring make material mixing even; (5) water ratio and the compactness of the test of contrast computation model add water to the design water ratio in the material that stirs; (6) according to the compaction Control way to the moulding of model trial material compaction.
Embodiment 2
A kind of preparation method of the analog material for model trial simulation swelling soil tunnel surrounding, step:
(1) test raw material clay and wilkinite are crossed the sieve of 4.75mm; (2) determine the desired degree of free swelling 38% of model trial material; (3) 100 parts of clays by weight ratio, 4 parts of wilkinites free rate of expansion be 47%; (4) material loading and stirring make material mixing even; (5) water ratio and the compactness of the test of contrast computation model add water to the design water ratio in the material that stirs; (6) according to the compaction Control way to the moulding of model trial material compaction.
Embodiment 3
A kind of preparation method of the analog material for model trial simulation swelling soil tunnel surrounding, step:
(1) test raw material clay and wilkinite are crossed the sieve of 4.75mm; (2) determine the desired degree of free swelling 56% of model trial material; (3) 100 parts of clays by weight ratio, 6 parts of wilkinites free rate of expansion be 56%; (4) material loading and stirring make material mixing even; (5) water ratio and the compactness of the test of contrast computation model add water to the design water ratio in the material that stirs; (6) according to the compaction Control way to the moulding of model trial material compaction.
Embodiment 4
A kind of preparation method of the analog material for model trial simulation swelling soil tunnel surrounding, step:
(1) test raw material clay and wilkinite are crossed the sieve of 4.75mm; (2) determine the desired degree of free swelling 60% of model trial material; (3) 100 parts of clays by weight ratio, 10 parts of wilkinites free rate of expansion be 60%; (4) material loading and stirring make material mixing even; (5) water ratio and the compactness of the test of contrast computation model add water to the design water ratio in the material that stirs; (6) according to the compaction Control way to the moulding of model trial material compaction.
Through related experiment, be example with medium swelling soil analog material of the present invention, following table is formed and mechanical property for its relevant batching, satisfies mechanics and the deformation characteristic of swelling soil country rock.
The batching of the medium swelling soil analog material of table 1 is formed and physico-mechanical properties
Claims (2)
1. one kind is used for the analog material that model trial is simulated the swelling soil tunnel surrounding, it is characterized in that, be main raw material with clay and the wilkinite of crossing the 4.75mm sieve, according to different inflation level by weight than batching, weak swelling soil: 100 parts of clays, wilkinite more than or equal to 2 parts less than 10 parts; Medium swelling soil: 100 parts of clays, wilkinite more than or equal to 10 parts less than 22 parts; Strong swelling soil: 100 parts of clays, wilkinite more than or equal to 22 parts less than 30 parts.
2. a preparation method who is used for the analog material of model trial simulation swelling soil tunnel surrounding is characterized in that, comprises that step is as follows:
(1) test raw material clay and wilkinite are crossed the sieve of 4.75mm;
(2) according to the swelling soil analog material inflation level of actual computation confirmed test needs;
(3) select corresponding raw material weight proportioning by the grade of determining: weak swelling soil: 100 parts of clays, wilkinite more than or equal to 2 parts less than 10 parts; Medium swelling soil: 100 parts of clays, wilkinite more than or equal to 10 parts less than 22 parts; Strong swelling soil: 100 parts of clays, wilkinite more than or equal to 22 parts less than 30 parts;
(4) material loading and stirring make material mixing even;
(5) raw material initial aqueous rate and the needed water ratio of model trial are calculated in contrast, add water to the design water ratio in the material that stirs;
(6) according to the compaction Control way to the moulding of model trial material compaction.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310164796.XA CN103242029B (en) | 2013-05-07 | 2013-05-07 | Similar material for simulating expansive soil tunnel surrounding rock in model test and preparation method thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310164796.XA CN103242029B (en) | 2013-05-07 | 2013-05-07 | Similar material for simulating expansive soil tunnel surrounding rock in model test and preparation method thereof |
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| Publication Number | Publication Date |
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| CN103242029A true CN103242029A (en) | 2013-08-14 |
| CN103242029B CN103242029B (en) | 2015-04-22 |
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| CN201310164796.XA Expired - Fee Related CN103242029B (en) | 2013-05-07 | 2013-05-07 | Similar material for simulating expansive soil tunnel surrounding rock in model test and preparation method thereof |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104891873A (en) * | 2015-05-26 | 2015-09-09 | 山东大学 | Similar material for simulating expansible tunnel surrounding rock and preparation method of similar material |
| CN105242010A (en) * | 2015-09-28 | 2016-01-13 | 山东大学 | Device and method for testing swelling-shrinkage soil tunnel model under effect of dry-wet circles |
| CN106338409A (en) * | 2016-08-31 | 2017-01-18 | 中南大学 | Tunnel-bottom-structure stress-state accurate-simulation indoor test apparatus |
| CN107101867A (en) * | 2017-05-25 | 2017-08-29 | 山东大学 | Coal seam Genesis of Karst Subsided Column gushing water model test similar materials and preparation method |
| CN108002803A (en) * | 2017-11-20 | 2018-05-08 | 山东大学 | It is a kind of to be used to simulate Muddy Bottoms clay analog material of deep foundation pit construction mechanism and preparation method thereof |
| CN112051389A (en) * | 2020-07-21 | 2020-12-08 | 中煤科工集团重庆研究院有限公司 | Preparation material for remolding coal series mud rock sample and batch preparation method thereof |
-
2013
- 2013-05-07 CN CN201310164796.XA patent/CN103242029B/en not_active Expired - Fee Related
Non-Patent Citations (2)
| Title |
|---|
| 孟庆云等: "膨胀土分类方法研究", 《公路》 * |
| 郑毅等: "《工程地质》", 31 July 2009, 武汉理工大学出版社 * |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104891873A (en) * | 2015-05-26 | 2015-09-09 | 山东大学 | Similar material for simulating expansible tunnel surrounding rock and preparation method of similar material |
| CN105242010A (en) * | 2015-09-28 | 2016-01-13 | 山东大学 | Device and method for testing swelling-shrinkage soil tunnel model under effect of dry-wet circles |
| CN106338409A (en) * | 2016-08-31 | 2017-01-18 | 中南大学 | Tunnel-bottom-structure stress-state accurate-simulation indoor test apparatus |
| CN106338409B (en) * | 2016-08-31 | 2018-07-24 | 中南大学 | A kind of tunnel bottom structural stress state accurately simulates laboratory testing rig |
| CN107101867A (en) * | 2017-05-25 | 2017-08-29 | 山东大学 | Coal seam Genesis of Karst Subsided Column gushing water model test similar materials and preparation method |
| CN107101867B (en) * | 2017-05-25 | 2020-07-31 | 山东大学 | Coal bed karst collapse column water inrush model test analog simulation material and preparation method thereof |
| CN108002803A (en) * | 2017-11-20 | 2018-05-08 | 山东大学 | It is a kind of to be used to simulate Muddy Bottoms clay analog material of deep foundation pit construction mechanism and preparation method thereof |
| CN108002803B (en) * | 2017-11-20 | 2019-07-02 | 山东大学 | A kind of Muddy Bottoms clay analog material and preparation method thereof for simulating deep foundation pit construction mechanism |
| CN112051389A (en) * | 2020-07-21 | 2020-12-08 | 中煤科工集团重庆研究院有限公司 | Preparation material for remolding coal series mud rock sample and batch preparation method thereof |
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|---|---|
| CN103242029B (en) | 2015-04-22 |
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