CN102691305A - Fiber reinforced earth and slope protection - Google Patents
Fiber reinforced earth and slope protection Download PDFInfo
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- CN102691305A CN102691305A CN2012101567547A CN201210156754A CN102691305A CN 102691305 A CN102691305 A CN 102691305A CN 2012101567547 A CN2012101567547 A CN 2012101567547A CN 201210156754 A CN201210156754 A CN 201210156754A CN 102691305 A CN102691305 A CN 102691305A
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Abstract
The invention discloses a fiber reinforced earth and a slope protection. The steps of preparing the fiber reinforced earth comprise weighting a needed earth of which the quality is M; drying the earth and making the earth pass through geotechnical sieves of which diameters are 5mm, 2.36mm, 1.18mm respectively; mixing uniformly the earth on the 5mm sieve, the earth on the 2.36mm sieve and the earth on the 1.18mm sieve of which percentages are 5%, 70%, 25% to obtain a sand clay; weighting a mekralon with a certain diameter which is one selected from 6mm, 12mm 19mm, wherein the quality of the mekralon takes i per mill which is one selected from 1.5 per mill, 5 per mill and 10 per mill of M quality of the earth; blending the mekralon with the earth that is mixing a proper amount of the mekralon after weighted into the sand clay; adding the mixture and water into a blending machine to get a uniform mixture that is the earth and the water are totally uniformly mixed and perform a plastic flow; finally preparation of a sample of the fiber reinforced earth is finished. The fiber reinforced earth and the slope protection technology not only can play a role of reinforcing protection but also can protect environmental ecology and maintain balance.
Description
Technical field
What the present invention relates to is a kind of fiber and steel bar reinforced soil and bank protection.
Background technology
When Ancient Times in China was built the house, ancients can mix an amount of straw or wheat straw to guarantee the safety and the durability of institute's walling body in building the required soil of body of wall.Modern science proof soil is the not material of tension of a kind of resistance to compression, and this material is widely used in engineering reality.Be to reach resistance to tension that improves soil and the purpose that improves the resistance to overturning of the soil body, be employed in and mix a certain proportion of method in the soil and reach this purpose with material of certain resistance to tension.Geosynthetics then with its low cost, be convenient to process and characteristics with certain flexibility are widely used in geotechnical engineering
Geotechnique's reinforced earth is used for the stability that side slope protection can effectively improve side slope, has increased the bulk strength and the erosion resistibility on side slope top layer.Be in the reinforced earth process of purpose to improve soil body tensile strength, banded perhaps sheet muscle material is buried underground by certain orientation in reinforced earth, thereby makes the mechanical property of reinforced earth have the characteristics of significant anisotropism.
Summary of the invention
Technical problem to be solved by this invention is that the deficiency that is directed against prior art provides a kind of fiber and steel bar reinforced soil and bank protection.
Technical scheme of the present invention is following:
A kind of fiber and steel bar reinforced soil takes by weighing the mass M of required soil, and with the soil oven dry, crossing diameter is geotechnique's sieve of 5mm, 2.36mm, 1.18mm; Get soil 5% on the 5mm sieve, soil 70% on the 2.36mm sieve, soil 25% on the 1.18mm sieve, and mix is even; Take by weighing the polypropylene fibre of certain-length with the i ‰ of the mass M of soil, the polypropylene fibre quality is M*i ‰, wherein one of the optional 6mm of polypropylene fibre length, 12mm and three kinds of length of diameter 19mm; Incorporation proportioning i ‰ optional 1.5 ‰, 5 ‰ and 10 ‰; Carry out the mix of fiber and soil earlier, an amount of polypropylene fibre after the weighing soon mixes in the sand clay, then mixture is added the lorry mounted mixer mix, adds water simultaneously and is stirred to evenly, i.e. the even fully fusion of water and soil is stream and moulds shape, and then fiber and steel bar reinforced soil sample is processed.
The present invention has adopted polypropylene fibre or other geotechnological synthetic fibers natural, that the macromolecular material fiber constitutes that different length is arranged native.By a certain percentage with the mixture of fiber and (sand) soil, water through the formed fiber and steel bar reinforced soil of high-pressure injection operation.Fiber is evenly and irregularly to mix in the soil.Therefore fiber and steel bar reinforced soil can be regarded as isotropic material of homogeneous.In fiber soil, continuous fiber be continuous bending, interlaced, be connected to each other, be mutually being present in the soil of network, the mechanism of action can be summarized as two aspects, i.e. " crooked mechanism " and " mechanism interweaves ".
The implication of crooked mechanism: the geometric shape of fibre in soil is countless turnover bendings, almost do not have straightway, and under external force, when fiber was drawn, its crooked recessed side just can be given birth to pressure and frictional force to local products.
The implication of the mechanism that interweaves: because fiber has countless intertwined points in the soil; If the power that in the cross fibers place, produces attempt lateral displacement fiber; Run into other fibers soon and stop this displacement; The stress deformation that is any section fibre all can affect the fiber of adjacent with it all directions, thereby forms the three-dimensional force area in space.
Fiber and steel bar reinforced soil also has following advantage ecological with environmental protection:
A) identical or similar with original side slope basement rock (soil) material, can not cause the soil fail or the pollution of basement rock (soil).
B) can not block the waterpower passage and the plant roots and stems development growth space of basement rock (soil).
C) can keep the style and features of original basement rock (soil).
D) accomplish the protective capacities that will form natural vegetation behind the initial stage safeguard function.
In sum, the novel slope protecting technique of fiber and steel bar reinforced soil can play reinforcement protection and can protect environmental ecology again and keep balance on side slope protection.So this plants Study on Technology and application is very important.
The specific embodiment
Below in conjunction with specific embodiment, the present invention is elaborated.
1) material constitutes
Fiber and steel bar reinforced native main body is after the common sand clay of most of areas guarantees good graduation curve through screening, takes by weighing the mass M (confirming to get the weight of corresponding soil as required) of required soil.Take by weighing the polypropylene fibre of certain-length with the i ‰ of the mass M of soil, the polypropylene fibre quality is M*i ‰, wherein the optional 6mm of polypropylene fibre length, 12mm and three kinds of length of diameter 19mm; Incorporation proportioning i ‰ optional 1.5 ‰, 5 ‰ and 10 ‰.
Carry out the mix of fiber and soil earlier, an amount of polypropylene fibre after the weighing soon mixes in the sand clay, then mixture is added the lorry mounted mixer mix, adds water simultaneously and is stirred to evenly, i.e. the even fully fusion of water and soil is stream and moulds shape, and then fiber and steel bar reinforced soil sample is processed.
2) sample preparation example
(1) the sample preparation example of soil sample and water
Raw material soil adopts the common sand clay of Chongqing region, and with the soil oven dry, crossing diameter is geotechnique's sieve of 5mm, 2.36mm, 1.18mm.In order to satisfy the sprinkling requirement of the grid that is of a size of 30cm*30cm*3cm, then get native 300g on the 5mm sieve, native 4200g on the 2.36mm sieve, native 1500g on the 1.18mm sieve amount to 6000g soil, and mix is even.Take by weighing 1500～2000g water.
(2) fiber incorporation example
A) 6mm polypropylene fibre
Match ratio 1.5 ‰ o'clock, incorporation or weighing are 9g; Match ratio 5 ‰ o'clock, incorporation or weighing are 30g; Match ratio 10 ‰ o'clock, incorporation or weighing are 60g.
B) 12mm polypropylene fibre
Match ratio 1.5 ‰ o'clock, incorporation or weighing are 9g; Match ratio 5 ‰ o'clock, incorporation or weighing are 30g; Match ratio 10 ‰ o'clock, incorporation or weighing are 60g.
C) 19mm polypropylene fibre
Match ratio 1.5 ‰ o'clock, incorporation or weighing are 9g; Match ratio 5 ‰ o'clock, incorporation or weighing are 30g; Match ratio 10 ‰ o'clock, incorporation or weighing are 60g.
(3) mix forming process
Load weighted fiber added to leave standstill in the entry in the soil that adds mix after 5 minutes stir, evenly merge to soil sample and fiber and be stream and mould shape, add air compressor machine and be sprayed in the grid, maintenance under normal temperature and pressure, then fiber and steel bar reinforced soil sample (plate) is processed.
3) strength test and contrast
(1) compressive strength contrast test
1. fibre length is to the influence of intensity
Different fibre lengths has obvious influence to the intensity of fiber soil, and this test has adopted the fiber soil test specimen of three kinds of fibre lengths (6mm, 12mm, 19mm) to compare, and the research fibre length is to the influence of fiber soil intensity.The result of the test that obtains is as shown in table 1:
The compressive strength index of the fiber soil of the different fibre lengths of table 1
2. the fiber match ratio is to the influence of intensity
Polypropylene fibre is adopted in test, makes an experiment by three kinds of match ratios (1.5 ‰, 5 ‰, 10 ‰), and result of the test is as shown in table 2.
Fiber soil compressive strength index under the table 2 different mixture ratio condition
(2) rupture strength contrast test
Polypropylene fibre is adopted in test, makes an experiment by different length (6mm, 12mm, 19mm) and different mixture ratio (1.5 ‰, 5 ‰, 10 ‰), and result of the test is as shown in table 3.
The rupture strength index of fiber soil under table 3 different condition
| Kind | Fiber is joined and is compared | Rupture strength (MPa) |
| (1) | Plain soil | 0.27 |
| (2) | Polypropylene 6mm 1.5 ‰ | 0.32 |
| (3) | Polypropylene 6mm 5 ‰ | 0.55 |
| (4) | Polypropylene 6mm 10 ‰ | 0.37 |
| (5) | Polypropylene 12mm 1.5 ‰ | 0.53 |
| (6) | Polypropylene 12mm 5 ‰ | 1.39 |
| (7) | Polypropylene 12mm 10 ‰ | 1.21 |
| (8) | Polypropylene 19mm 1.5 ‰ | 0.30 |
| (9) | Polypropylene 19mm 5 ‰ | 1.17 |
| (10) | Polypropylene 19mm 10 ‰ | 0.40 |
(3) reinforced effects analysis
Under different length and the conditions of mixture ratios, part resistance to compression and rupture strength reinforced effects are seen table 4 and table 5 respectively.
Table 4 polypropylene fibre match ratio 5 ‰, different length fiber soil intensity increases multiple
| Plain soil | 6mm | 12mm | 19mm | |
| Compressive resistance increases multiple | 1.0 | 3.13 | 7.03 | 3.93 |
| Fracture resistence force increases multiple | 1.0 | 1.98 | 5.00 | 4.21 |
Table 5 19mm polypropylene fibre, different mixture ratio fiber soil intensity increases multiple
| Plain soil | 1.5‰ | 5‰ | 10‰ | |
| Compressive resistance increases multiple | 1.0 | 1.64 | 3.93 | 1.85 |
| Fracture resistence force increases multiple | 1.0 | 1.08 | 4.21 | 1.43 |
Aforementioned calculation result shows: in soil, mix after the fibre, when the soil body deformed, fiber had effectively retrained the distortion of the soil body, had improved the compressive strength of the soil body.Plain relatively soil, fiber and steel bar reinforced soil has obviously improved native intensity, with effectively having guaranteed the resistance to overturning of soil in side slope protection fiber and steel bar reinforced.
Site construction technology and technology:
(1) confirms grid size and material usage (grid height basic fixed position 5cm to 6cm) according to the engineering entity during preparation of construction, facility configuration and debugging.II?I?III
(2) when construction is fixed on wooden grid on the side slope that desire reinforces earlier, treats that the fixing high-power air compressor machine of back use of accomplishing is injected into ready fiber and steel bar reinforced soil in the middle of the grid with high voltage style, makes material that grid is filled up.Carry out apparent processing after filling up, guarantee to spray as far as possible equal even distribution of material evenly.
(3) AEI After End of Injection increases moisture in initial stage safeguard procedures maintenance to the spray material and evaporates basically and can remove covering after making material bodies reveal certain intensity, promptly externally under the environment maintenance to the strength of materials bring into play fully, can come into operation.
Should be understood that, concerning those of ordinary skills, can improve or conversion, and all these improvement and conversion all should belong to the protection domain of accompanying claims of the present invention according to above-mentioned explanation.
Claims (2)
1. a fiber and steel bar reinforced soil is characterized in that, takes by weighing the mass M of required soil, and with the soil oven dry, crossing diameter is geotechnique's sieve of 5mm, 2.36mm, 1.18mm; Get soil 5% on the 5mm sieve, soil 70% on the 2.36mm sieve, soil 25% on the 1.18mm sieve, and mix is even; Take by weighing the polypropylene fibre of certain-length with the i ‰ of the mass M of soil, the polypropylene fibre quality is M*i ‰, wherein one of the optional 6mm of polypropylene fibre length, 12mm and three kinds of length of diameter 19mm; Incorporation proportioning i ‰ optional 1.5 ‰, 5 ‰ and 10 ‰; Carry out the mix of fiber and soil earlier, an amount of polypropylene fibre after the weighing soon mixes in the sand clay, then mixture is added the lorry mounted mixer mix, adds water simultaneously and is stirred to evenly, i.e. the even fully fusion of water and soil is stream and moulds shape, and then fiber and steel bar reinforced soil sample is processed.
2. the bank protection that fiber and steel bar reinforced soil according to claim 1 is constructed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012101567547A CN102691305A (en) | 2012-05-18 | 2012-05-18 | Fiber reinforced earth and slope protection |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012101567547A CN102691305A (en) | 2012-05-18 | 2012-05-18 | Fiber reinforced earth and slope protection |
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| Publication Number | Publication Date |
|---|---|
| CN102691305A true CN102691305A (en) | 2012-09-26 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2012101567547A Pending CN102691305A (en) | 2012-05-18 | 2012-05-18 | Fiber reinforced earth and slope protection |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103422491A (en) * | 2013-06-28 | 2013-12-04 | 上海理工大学 | Palm fiber reinforced soil, preparation method thereof and application |
| CN104099921A (en) * | 2014-07-24 | 2014-10-15 | 南京大学（苏州）高新技术研究院 | Wavy fiber reinforced soil and preparation method for same |
| CN104831740A (en) * | 2015-05-29 | 2015-08-12 | 长沙理工大学 | Slope protection method and structure based on earthwork standard room and mixture of fiber and clay |
| CN107903904A (en) * | 2017-11-23 | 2018-04-13 | 上海理工大学 | A kind of Polypropylene Fiber Reinforced improvement weak soil and preparation method thereof |
| CN112266206A (en) * | 2020-10-29 | 2021-01-26 | 南京工业大学 | Semi-dry mixing method preparation technology for waste rubber particle reinforced composite soil sample |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2573554Y (en) * | 2002-08-16 | 2003-09-17 | 李兰英 | Reinforcement gridiron |
| CN101619619A (en) * | 2009-07-16 | 2010-01-06 | 重庆交通大学 | Construction method for strengthening concrete component by prestress carbon fiber prepregs |
| CN102011394A (en) * | 2010-11-12 | 2011-04-13 | 赵莹莹 | Method for reinforcing aeolian sandy soil by polypropylene fibers |
-
2012
- 2012-05-18 CN CN2012101567547A patent/CN102691305A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2573554Y (en) * | 2002-08-16 | 2003-09-17 | 李兰英 | Reinforcement gridiron |
| CN101619619A (en) * | 2009-07-16 | 2010-01-06 | 重庆交通大学 | Construction method for strengthening concrete component by prestress carbon fiber prepregs |
| CN102011394A (en) * | 2010-11-12 | 2011-04-13 | 赵莹莹 | Method for reinforcing aeolian sandy soil by polypropylene fibers |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103422491A (en) * | 2013-06-28 | 2013-12-04 | 上海理工大学 | Palm fiber reinforced soil, preparation method thereof and application |
| CN104099921A (en) * | 2014-07-24 | 2014-10-15 | 南京大学（苏州）高新技术研究院 | Wavy fiber reinforced soil and preparation method for same |
| CN104099921B (en) * | 2014-07-24 | 2016-05-11 | 南京大学（苏州）高新技术研究院 | A kind of undulated fibre reinforced earth and preparation method thereof |
| CN104831740A (en) * | 2015-05-29 | 2015-08-12 | 长沙理工大学 | Slope protection method and structure based on earthwork standard room and mixture of fiber and clay |
| CN107903904A (en) * | 2017-11-23 | 2018-04-13 | 上海理工大学 | A kind of Polypropylene Fiber Reinforced improvement weak soil and preparation method thereof |
| CN112266206A (en) * | 2020-10-29 | 2021-01-26 | 南京工业大学 | Semi-dry mixing method preparation technology for waste rubber particle reinforced composite soil sample |
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Application publication date: 20120926 |