CN104891873B - A kind of analog material for simulating swell-shrink characteristic tunnel surrounding and preparation method thereof - Google Patents
A kind of analog material for simulating swell-shrink characteristic tunnel surrounding and preparation method thereof Download PDFInfo
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- CN104891873B CN104891873B CN201510275315.1A CN201510275315A CN104891873B CN 104891873 B CN104891873 B CN 104891873B CN 201510275315 A CN201510275315 A CN 201510275315A CN 104891873 B CN104891873 B CN 104891873B
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- bentonite
- flyash
- silicone oil
- swelled ground
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/91—Use of waste materials as fillers for mortars or concrete
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- Consolidation Of Soil By Introduction Of Solidifying Substances Into Soil (AREA)
- Lining And Supports For Tunnels (AREA)
Abstract
Patent of the present invention relates to a kind of analog material for simulating swell-shrink characteristic tunnel surrounding and preparation method thereof, the component proportion of the different infiltration grades of described analog material is as follows: high osmosis swelled ground: 96 105 parts of flyash, bentonite 11 17 parts, silicone oil 8 10 parts；Middle permeability swelled ground: 95 104 parts of flyash, bentonite 17 25 parts, silicone oil 8 11 parts；Hypotonicity swelled ground: 96 105 parts of flyash, bentonite 25 30 parts, silicone oil 9 12 parts.The present invention can carry out model experiment with the swelled ground of proportioning difference permeability, can not only simulate the field condition of drying and watering cycle, moreover it is possible to meets mechanics and the deformation characteristic of swell-shrink characteristic country rock, gathers materials on the spot, convenient saving.The rock that bentonite is mainly made up of montmorillonite, its dilatancy is high.In flyash, unburned carbon granule becomes loose and porous structure, has high osmosis, the most also has the effect of repression of swelling, by changing proportioning scalable analog material permeance property and inflation level.
Description
Technical field
Present invention relates particularly to a kind of analog material for simulating swell-shrink characteristic tunnel surrounding and preparation method thereof.
Technical background
At present, in Tunnel Engineering is built, engineering is often in precipitation weather condition, and tunnel swell-shrink characteristic is enclosed by drying and watering cycle effect
Rock has a significant impact, and country rock can cause a certain degree of destruction in sampling with transportation, its original mechanical property and deformation
Feature also can occur to change accordingly, and remote sampling cost simultaneously is higher；Present stage During Geotechnical Tests often uses swelling clay model
Intend tunnel swell-shrink characteristic country rock, but due to the character in its water-swellable blocking filler gap, infiltration experiment is difficult to, it is impossible to use
Tunnel swell-shrink characteristic country rock under simulation drying and watering cycle effect.
Summary of the invention
It is an object of the invention to overcome prior art not enough, it is provided that a kind of analog material for simulating swell-shrink characteristic tunnel surrounding and
Its preparation method, this analog material has preferable permeability performance, it is easy to simulation swell-shrink characteristic country rock is under drying and watering cycle effect
Mechanics and deformation characteristic, can gather materials on the spot simultaneously, improves resource utilization.
The technical scheme that patent of the present invention is taked is:
A kind of analog material for simulating swell-shrink characteristic tunnel surrounding, the component proportion of different infiltration grades is as follows:
High osmosis swelled ground: flyash 96-105 part, bentonite 11-17 part, silicone oil 8-10 part；
Middle permeability swelled ground: flyash 95-104 part, bentonite 17-25 part, silicone oil 8-11 part；
Hypotonicity swelled ground: flyash 96-105 part, bentonite 25-30 part, silicone oil 9-12 part.
Preferably, a kind of analog material for simulating swell-shrink characteristic tunnel surrounding, the component proportion of different infiltration grades is as follows:
High osmosis swelled ground: 100 parts of flyash, bentonite 11-13 part, silicone oil 8-9 part；
Middle permeability swelled ground: 100 parts of flyash, bentonite 17-19 part, silicone oil 8-10 part；
Hypotonicity swelled ground: 100 parts of flyash, bentonite 25-27 part, silicone oil 9-11 part.
Preferably, a kind of analog material for simulating swell-shrink characteristic tunnel surrounding, the component proportion of different infiltration grades is as follows:
High osmosis swelled ground: 100 parts of flyash, bentonite 12 parts, silicone oil 9 parts；
Middle permeability swelled ground: 100 parts of flyash, bentonite 18 parts, silicone oil 10 parts；
Hypotonicity swelled ground: 100 parts of flyash, bentonite 25 parts, silicone oil 11 parts.
The preparation method of a kind of analog material for simulating swell-shrink characteristic tunnel surrounding, comprises the steps:
(1) infiltration grade is determined according to practical situation；
(2) weight proportion of the infiltration corresponding raw material of hierarchical selection being determined by；
(3) feed and stir, making material mixing uniform, obtaining mixing material, wherein, high osmosis swelled ground: powder
Coal ash 96-105 part, bentonite 11-17 part；Middle permeability swelled ground: flyash 95-104 part, bentonite 17-25 part；
Hypotonicity swelled ground: flyash 96-105 part, bentonite 25-30 part；
(4) in mixing material, add silicone oil, and stir, obtain described analog material；
The purpose adding silicone oil in mixing material is to simulate actual country rock cohesive strength, and silicone oil usage amount is unsuitable excessive, silicon
When oil consumption is excessive, material permeability can be significantly reduced, thus cause the failure of an experiment；Silicone oil amount is too small may arrive cause similar
Material cohesive strength is not enough, and then at simulation of excavation process country rock premature failure.
(5) the analog material compaction moulding that will prepare in step (4).
Preferably, in step (4), high osmosis swelled ground adds silicone oil 8-10 part, middle permeability swelled ground adds silicon
Oil 8-11 part, adds silicone oil 9-12 part in hypotonicity swelled ground.
Preferably, described flyash crosses 0.5mm sieve.
Preferably, described bentonite crosses 0.5mm sieve.
Preferably, the compactness of described compaction moulding is in the range of 90-95%.
The invention has the beneficial effects as follows:
1, the present invention can carry out model experiment with the swelled ground of proportioning difference permeability.Common swelled ground analog material is for model
In experiment, often due to bentonite imbibition blocking penetrating passage, serious reduction material permeability performance, ultimately result in experiment
Failure；And the good material of permeability performance does not the most possess swell-shrink characteristic, it is impossible to the deformation of simulation swell-shrink characteristic country rock and mechanical characteristic.
Analog material in the present invention, have chosen the fly ash material seldom used in model test, and by a large amount of infrastests,
Draw a series of relatively reasonable proportioning so that analog material can simulate the field condition of drying and watering cycle, can meet again swollen
The mechanics of contracting country rock and deformation characteristic, gather materials on the spot, convenient saving.
2, the rock that bentonite is mainly made up of montmorillonite, its dilatancy is high.Flyash is produced by coal dust firing, wherein
Unburned carbon granule becomes loose and porous structure, and beneficially liquid passes through, and has high osmosis, the most also has the effect of repression of swelling,
By changing proportioning scalable analog material permeance property and inflation level.Analog material in the present invention can pass through flyash
The content of regulation bentonite montmorillonite, controls its permeability and swelliong power, to meet drying and watering cycle requirement of experiment and expansion
The mechanical property of soil.
3, for making analog material reach to envision character, present invention uses the common used material of multiple different field, and by basis
Centrifugal modeling makes it organically combine: bentonite determines material swell-shrink characteristic, and flyash improves material permeability and reacts on breathing
Property, silicone oil promotes material cohesive strength, can be that similar application invention provides certain reference.
Detailed description of the invention
Below in conjunction with specific embodiment, the invention will be further described.
Tunnel excavation model experiment under the conditions of simulation swelling clay rock, according to experiment needs, chooses many groups and has different infiltration coefficient
With the analog material of expansion rate for comparative study:
Embodiment 1
Prepared by described analog material specifically comprises the following steps that
(1) select without obvious impurity and the swelled ground of bigger knot and flyash；
(2) determining the permeability of analog material required by model test, differently configured ratio can be used for contrast experiment；
(3) proportioning is carried out by weight: 100 parts of flyash and bentonite 11 parts；
(4) feeding and stirring so that material mixing is uniform；
(5) adding silicone oil in the material stirred, the quality of silicone oil is the 9% of flyash and bentonite quality sum；
(6) need to control compactness according to experiment and make model test material compaction moulding, in the case of 95% compactness, infiltration
Coefficient is 2.7 × 10-5cm/s。
Embodiment 2
Prepared by described analog material specifically comprises the following steps that
(1) select without obvious impurity and the swelled ground of bigger knot and flyash；
(2) determining the permeability of analog material required by model test, differently configured ratio can be used for contrast experiment；
(3) 100 parts of proportioning flyash and bentonite 17 parts are carried out by weight；
(4) feeding and stirring so that material mixing is uniform；
(5) adding silicone oil in the material stirred, quality is the 8% of flyash and bentonite quality sum；
(6) need to control compactness according to experiment and make model test material compaction moulding, in the case of 95% compactness, ooze
Coefficient is respectively 1.6 × 10 thoroughly-5cm/s。
Embodiment 3
Prepared by described analog material specifically comprises the following steps that
(1) select without obvious impurity and the swelled ground of bigger knot and flyash；
(2) determining the permeability of analog material required by model test, differently configured ratio can be used for contrast experiment；
(3) 100 parts of proportioning flyash and bentonite 25 parts are carried out by weight；
(4) feeding and stirring so that material mixing is uniform；
(5) adding silicone oil in the material stirred, quality is the 7% of flyash and bentonite quality sum；
(6) need to control compactness according to experiment and make model test material compaction moulding, in the case of 95% compactness, infiltration
Coefficient is respectively 1.1 × 10-5cm/s。
Table 1 is composition and the permeance property of three embodiments, on the premise of having swelled ground expansion character, meets phase
Close experiment to its tonicity requirements.
The composition of table 1 different permeability swelled ground analog material and permeance property thereof
From table 1, along with the raising of analog material permeance property, the addition of silicone oil reduces, this is because along with swelling
Soil content increases, and the cohesive strength of analog material can be obviously improved, for reaching to need the silicone oil amount of intensity to reduce, the most swollen
Profit soil content increase can reduce analog material infiltration coefficient, too much adds silicone oil and infiltration performance can be caused cannot to meet experiment
Requirement.
Although the above-mentioned detailed description of the invention to the present invention is described, but not restriction to invention protection domain, affiliated
Skilled person should be understood that on the basis of technical scheme, and those skilled in the art need not pay creation
Property the various amendments that can make of work or deformation the most within the scope of the present invention.
Claims (8)
1. the analog material being used for simulating swell-shrink characteristic tunnel surrounding, it is characterised in that: the different infiltrations of described analog material
The component proportion of grade is as follows:
High osmosis swelled ground: flyash 96-105 part, bentonite 11-17 part, silicone oil 8-10 part；
Middle permeability swelled ground: flyash 95-104 part, bentonite 17-25 part, silicone oil 8-11 part；
Hypotonicity swelled ground: flyash 96-105 part, bentonite 25-30 part, silicone oil 9-12 part.
2. the analog material being used for simulating swell-shrink characteristic tunnel surrounding, it is characterised in that: the different infiltrations of described analog material
The component proportion of grade is as follows:
High osmosis swelled ground: 100 parts of flyash, bentonite 11-13 part, silicone oil 9-10 part；
Middle permeability swelled ground: 100 parts of flyash, bentonite 17-19 part, silicone oil 8-9 part；
Hypotonicity swelled ground: 100 parts of flyash, bentonite 25-27 part, silicone oil 9-11 part.
3. the analog material being used for simulating swell-shrink characteristic tunnel surrounding, it is characterised in that: the different infiltrations of described analog material
The component proportion of grade is as follows:
High osmosis swelled ground: 100 parts of flyash, bentonite 12 parts, silicone oil 9 parts；
Middle permeability swelled ground: 100 parts of flyash, bentonite 18 parts, silicone oil 10 parts；
Hypotonicity: 100 parts of flyash, bentonite 25 parts, silicone oil 11 parts.
4., for simulating a preparation method for the analog material of swell-shrink characteristic tunnel surrounding, comprise the steps:
(1) infiltration grade is determined according to practical situation；
(2) weight proportion of the infiltration corresponding raw material of hierarchical selection being determined by；
(3) feed and stir, making material mixing uniform, obtaining mixing material, wherein, high osmosis swelled ground: fine coal
Ash 96-105 part, bentonite 11-17 part；Middle permeability swelled ground: flyash 95-104 part, bentonite 17-25 part；Low
Permeability swelled ground: flyash 96-105 part, bentonite 25-30 part；
(4) in mixing material, add silicone oil, and stir, obtain described analog material；
(5) the analog material compaction moulding that will prepare in step (4).
Preparation method the most according to claim 4, it is characterised in that: in step (4), in high osmosis swelled ground
Add silicone oil 8-10 part, middle permeability swelled ground adds silicone oil 8-11 part, hypotonicity swelled ground adds silicone oil 9-12
Part.
Preparation method the most according to claim 5, it is characterised in that: described flyash crosses 0.5mm sieve.
Preparation method the most according to claim 5, it is characterised in that: described bentonite crosses 0.5mm sieve.
Preparation method the most according to claim 4, it is characterised in that: in step (5), the pressure of described compaction moulding
Solidity is in the range of 90-95%.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510275315.1A CN104891873B (en) | 2015-05-26 | 2015-05-26 | A kind of analog material for simulating swell-shrink characteristic tunnel surrounding and preparation method thereof |
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| CN201510275315.1A CN104891873B (en) | 2015-05-26 | 2015-05-26 | A kind of analog material for simulating swell-shrink characteristic tunnel surrounding and preparation method thereof |
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| CN104891873B true CN104891873B (en) | 2017-01-04 |
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| CN105242010B (en) * | 2015-09-28 | 2017-06-27 | 山东大学 | The model test apparatus and method of the lower swell-shrink characteristic earth tunnel of drying and watering cycle effect |
| 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 |
| CN109437672A (en) * | 2018-11-26 | 2019-03-08 | 西南科技大学 | A kind of Rock soil similar material and preparation method thereof that intensive parameter is controllable |
| CN110642583B (en) * | 2019-10-23 | 2020-11-03 | 山东大学 | Coral sand-crumbs limestone and coral conglomerate-crumbs limestone similar material, and preparation method and application thereof |
| CN111812300A (en) * | 2020-07-21 | 2020-10-23 | 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 |
| CN114034839B (en) * | 2021-11-03 | 2024-06-21 | 广东中煤江南工程勘测设计有限公司 | Soil adhesion curing agent and soil detection method |
| CN114577571A (en) * | 2022-03-18 | 2022-06-03 | 昆明理工大学 | Similar material for simulating IV-level and V-level surrounding rock of cross-fault tunnel model test and preparation method |
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| CN103242029B (en) * | 2013-05-07 | 2015-04-22 | 山东大学 | Similar material for simulating expansive soil tunnel surrounding rock in model test and preparation method thereof |
| CN103755209A (en) * | 2013-12-26 | 2014-04-30 | 中国矿业大学 | Hydrophobic similar material for mined rock mass crack research |
| CN103936330B (en) * | 2014-04-12 | 2016-10-26 | 北京工业大学 | A kind of geomechanics model analog material for simulating V class surrounding rock |
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