CN106088113A - A kind of expansive soil slope reinforcement means - Google Patents
A kind of expansive soil slope reinforcement means Download PDFInfo
- Publication number
- CN106088113A CN106088113A CN201610496324.8A CN201610496324A CN106088113A CN 106088113 A CN106088113 A CN 106088113A CN 201610496324 A CN201610496324 A CN 201610496324A CN 106088113 A CN106088113 A CN 106088113A
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- China
- Prior art keywords
- slope
- geomembrane
- soil
- expansive soil
- reinforcement means
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Classifications
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D17/00—Excavations; Bordering of excavations; Making embankments
- E02D17/20—Securing of slopes or inclines
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D17/00—Excavations; Bordering of excavations; Making embankments
- E02D17/20—Securing of slopes or inclines
- E02D17/202—Securing of slopes or inclines with flexible securing means
Abstract
The invention discloses a kind of expansive soil slope reinforcement means, the method comprises the following steps: at top, the slope of expansive soil slope and domatic excavation, the excavation face degree of depth is 0.4 0.6m；Excavating zanjon at slope edges line 8 12m, the degree of depth is 0.8 1.2m；Laying geomembrane in excavation face, geomembrane extends in zanjon to trailing edge on top, slope；At top, slope and the unexpansive soil of domatic backfill after geomembrane laying is smooth, thickness is 0.4 0.6m, and geomembrane is fixed in compaction in layers.Inhibit strength retrogression's characteristic of swelled ground after side slope is reinforced, reduce the moisture amplitude of variation of swelled ground simultaneously, prevent landslide.
Description
Technical field
The present invention relates to method for reinforcing side slope, be specifically related to a kind of expansive soil slope reinforcement means.
Background technology
Swelled ground is a kind of with strongly hydrophilic mineral, such as montmorillonite, illite etc., glues for mainly comprising the high-ductility of composition
Soil, it produces significant dilatancy after being mainly characterized by water suction, produces significant contraction distortion, the most also have many after dehydration
Fissurity, overconsolidation and strength retrogression's property.Owing to its engineering characteristic complicated difficult is commonly referred to as " problem soil ", to work to administer
Cheng Jianshe causes many puzzlements.Swelled ground early strength is the highest, and Side Slope Safety Coefficient is far longer than 1, there is not stable problem, but
As time go on, expansive soil slope soil strength is gradually decayed, and safety coefficient reduces, and then causes expansive soil slope unstability.
The slight slope of swelled ground area, often produces landslide such as embankment, cutting, channel side slopes etc..On railway, JIAOZHI line, crow official
There are 125 unstability accidents in the 70's of 20th century in line, at the subgrade defect 521 in sun peace swelled ground section；In water conservancy,
The trunk canal of Anhui Pishihang Irrigation District 1385km length occurs at landslide 195, and average every 10km has 1.4 landslides；Yin Dan irrigated area, Hubei
Trunk canal excavation canal section is caved at 55, and embankment section comes down at 18.Unstability usually occurs in the mildest side slope, as Tao Cha draws pellet
Channel, occurs after going into operation 1 year to come down at 13 in two canal sections in succession, and it mostly occurs on the gentle slope of 1:4～1:5.Some is sliding
Slope then occurs after engineering is built up for many years, such as the trunk canal on Pishihang Irrigation District swelled ground, builds up the fifties, occurs by 1989 years
Coming down at 195, wherein most occurred in the eighties.But also have quite a lot of expansive soil slope not mild steady in a long-term,
As Liu Te flood lists 24 case histories built a dam with swelled ground in " the swelled ground problem in engineering construction " book.
The instability Mechanism of expansive soil slope: when being dried, swelled ground dehydration shrinkage forms crack, and drawing crack soil structures is aobvious
Write the intensity index reducing the soil body；During rainfall, swelled ground imbibition makes the swollen pine of soil block internal structure, has been significantly reduced soil
The intensity index of block；Therefore the most homogeneous slope body has been divided into the soil up and down that intensity is dramatically different by the result of drying and watering cycle
Layer；No matter shrink the crack produced, or expansion causes the hole increase of soil block that rainwater all can be made quickly to penetrate into, gather.These
Combined factors results in expansive soil slope together and is prone to unstability.
At present swelled ground is processed by engineering circles does not has the treating method of maturation not yet, the main method that uses be change fill out non-swollen
Swollen cohesive soil, or weak expansive soil is modified into unexpansive soil by the admixture material such as cement, Calx changes and fill out, change the master filled out
Acting on is ballast, and secondary role is to close swelled ground, but the method quantities is bigger, it is impossible to effectively alleviate landslide phenomenon.
Summary of the invention
In order to overcome above the deficiencies in the prior art, the invention provides a kind of expansive soil slope reinforcement means, side slope warp
Inhibit strength retrogression's characteristic of swelled ground after reinforcing, reduce the moisture amplitude of variation of swelled ground simultaneously, prevent landslide.
The technical solution used in the present invention is: a kind of expansive soil slope reinforcement means, comprises the following steps:
(1) at top, the slope of expansive soil slope and domatic excavation, the excavation face degree of depth is 0.4-0.6m；
(2) excavating zanjon at slope edges line 8-12m, the degree of depth is 0.8-1.2 m；
(3) laying geomembrane in excavation face, geomembrane extends in zanjon to trailing edge on top, slope；
(4) at top, slope and the unexpansive soil of domatic backfill after geomembrane laying is smooth, thickness is 0.4-0.6m, the fixing soil of compaction in layers
Work film.
Preferably, the slope of above-mentioned steps (1) middle expansive soils side slope is than for 1:1.5-1:3.
Preferably, in above-mentioned steps (1), the ramp portion of excavation face is step, can increase connectivity robustness, prevent slope
Swelled ground on face glides.
Preferably, in above-mentioned steps (2), zanjon is parallel to side slope trend, is used for fixing geomembrane.
Preferably, after geomembrane is fixed in compaction in layers in above-mentioned steps (4), use vegetation green on unexpansive soil backfilling
Change, protect geomembrane, prevent geomembrane aging action.
Beneficial effect:
(1) utilize the impermeability of geomembrane, both can intercept the moisture evaporation in swelled ground face, it is possible to stop earth's surface rainfall to cause swollen
Swollen soil water content increases, and then stabilizes the water content of swelled ground under geomembrane, reduces the moisture amplitude of variation of swelled ground；
(2) swelled ground is after geomembrane covers, and under film, the moisture of swelled ground will maintain substantially because evaporation capacity greatly reduces
The water content of swelled ground, swelled ground would not occur excessive contraction distortion, would not produce excessive shrinkage stress, thus really
Protect the swelled ground lateral pressure that shrinkage stress causes during side slope operation under film less than the tensile strength of swelled ground and soil deadweight
Stress sum, and then prevent the contraction fissure of swelled ground to produce, the intensity of swelled ground also will not reduce；
(3) swelled ground is after geomembrane covers, and rainwater produced by rainfall cannot infiltrate to film swollen because there being the obstruct of geomembrane
In swollen soil, thus the water content avoiding swelled ground under film increases probability, and under film, swelled ground would not expand deformation, from
And guaranteeing that expanding filling's dry density under film is basically unchanged, soil structures will not be destroyed, and the original intensity maintaining swelled ground refers to
Mark；
(4) swelled ground is after geomembrane covers, and geomembrane covers unexpansive soil again, and its effect is for greening vegetation, and protects
Geomembrane, prevents geomembrane aging action.
Accompanying drawing explanation
Fig. 1 is the schematic diagram of expansive soil slope of the present invention, wherein: 1, Po Ding；2, domatic；3, geomembrane；4, zanjon；
Fig. 2 is test side slope plane graph in embodiment 2；
Fig. 3 is the crack developing position testing side slope in embodiment 2；
Fig. 4 embodiment 2 is tested slope crack district (on July 3rd, 2007 plugs phragmites communis)；
Fig. 5 embodiment 2 is tested slope crack district and plugs the schematic diagram of phragmites communis；
Fig. 6 embodiment 2 is tested and after side slope terminates, excavates proof diagram in geomembrane district；
Fig. 7 is the schematic diagram that the domatic lower moisture content in embodiment 2 Zhong You geomembrane district changes along depth profile；
Fig. 8 is the schematic diagram changed along depth profile without the domatic lower moisture content in geomembrane district in embodiment 2.
Detailed description of the invention
The present invention is described in further detail below.
Embodiment 1
A kind of expansive soil slope reinforcement means, comprises the following steps:
(1) as it is shown in figure 1, push up 1 and domatic 2 excavations on slope than the expansive soil slope slope for 1:1.5-1:3, the excavation face degree of depth is
0.4-0.6m, wherein the ramp portion of excavation face is step；
(2) push up excavation zanjon 4 at 1 edge line 8-12m away from slope, described zanjon 4 is parallel to side slope trend, and the degree of depth is 0.8-1.2 m；
(3) laying geomembrane 3 in excavation face, geomembrane 3 extends in zanjon 4 to trailing edge on top, slope 1；
(4) geomembrane 3 lay smooth after slope top 1 and domatic 2 backfill unexpansive soil, thickness is 0.4-0.6m, and compaction in layers is solid
Determine geomembrane 3, use greening vegetation on unexpansive soil backfilling.
Embodiment 2
Certain main road, city section side slope, before and after 2000, because the needs of bridge construction fetch earth on this slope, main road exists again when building
Soil is unloaded in this toe location, slope so that earth's surface exposes substantial amounts of primary swelled ground, and this swelled ground free swelling rate is 50～70,
In June, 2003, because of road excavation, comes down, and within 2004, once made two row's digging hole filling piles and reinforces, but still has regional area notable
Mobile.
In June, 2006, this side slope is tested, by long 30m as the small-sized on-the-spot of geomembrane covering treatment expansive soil slope
Scope accomplish test side slope, slope is than 1:1.5, slope height 2.5m, slope end face width 10m, and is divided into two regions, and the right 15m does not covers
Lid geomembrane, left side 15m is domatic and very useful covering the in slope reinforces (Fig. 2), and reinforcement means comprises the following steps:
(1) as it is shown in figure 1, at top, the slope of expansive soil slope 1 and domatic 2 excavations, slope ratio is for 1:1.5, and the excavation face degree of depth is 0.5m,
Wherein the ramp portion of excavation face is step；
(2) push up excavation zanjon 4 at 1 edge line 10m away from slope, described zanjon 4 is parallel to side slope trend, and the degree of depth is 1.0m；
(3) laying geomembrane 3 in excavation face, geomembrane 3 extends in zanjon 4 to trailing edge on top, slope 1；
(4) geomembrane 3 lay smooth after backfill unexpansive soil on top, slope 1 and domatic 2, thickness is 0.5m, the fixing soil of compaction in layers
Work film 3, uses greening vegetation backfilling on unexpansive soil.
In June, 2007, this area's rainfall is relatively big, and on-the-spot tour finds, the slope crack reinforced without geomembrane carries out (figure
3), there is tendency toward sliding, but the side slope having geomembrane to cover has no crack.In order to further appreciate that soil body situation under geomembrane, really
Determining whether the soil body under film has crack developing, regional area cuts out overburden soil protective layer above, does not finds crack, and under film, soil is hard
Firmly, step is intact, shows that geomembrane has reached Expected Results.Moreover, it has also pind down the unlapped side slope in right side so that it is
In the case of crack is significantly carried out, the most do not come down (Fig. 4-6).
December in 2006 respectively drills through two hole soil below two regional slope on the 6th and does water ratio test, using this value as
Initial value, moisture content data in the soil body during comparative analysis test.In process of the test, on January 5th, 2007, in January, 2007
10 days, on January 21st, 2007, on January 28th, 2007, on July 6th, 2007, on July 24th, 2007,2007 on JIUYUE 24,
JIUYUE in 2007 respectively drills through a hole soil below two regional slope on the 30th and does water ratio test, and wherein geomembrane is swollen after reinforcing
Water-cut variation in swollen soil is less, is 25% ± 3%, the side slope then water-cut variation that unused geomembrane is reinforced relatively big (Fig. 7-
8).
The present invention is described in detail the most with a general description of the specific embodiments, but in the present invention
On the basis of, it can be made some modifications or improvements, this will be apparent to those skilled in the art.Therefore, not
Deviate these modifications or improvements on the basis of spirit of the present invention, belong to the scope of protection of present invention.
Claims (5)
1. an expansive soil slope reinforcement means, it is characterised in that comprise the following steps:
(1) at top, the slope of expansive soil slope (1) and domatic (2) excavation, the excavation face degree of depth is 0.4-0.6m；
(2) excavating zanjon (4) at Po Ding (1) edge line 8-12m, the degree of depth is 0.8-1.2m；
(3) laying geomembrane (3) in excavation face, geomembrane (3) extends in zanjon (4) to trailing edge at Po Ding (1)；
(4) geomembrane (3) lay smooth after backfill unexpansive soil at Po Ding (1) and domatic (2), thickness is 0.4-0.6m, layering
The fixing geomembrane (3) of compacting.
A kind of expansive soil slope reinforcement means the most according to claim 1, it is characterised in that: described step (1) expands
The slope ratio of soil side slope is for 1:1.5-1:3.
A kind of expansive soil slope reinforcement means the most according to claim 1, it is characterised in that: excavation in described step (1)
The ramp portion in face is step.
A kind of expansive soil slope reinforcement means the most according to claim 1, it is characterised in that: zanjon in described step (2)
(4) side slope trend it is parallel to.
A kind of expansive soil slope reinforcement means the most according to claim 1, it is characterised in that: layering in described step (4)
After the fixing geomembrane (3) of compacting, use greening vegetation on unexpansive soil backfilling.
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| CN201610496324.8A CN106088113A (en) | 2016-06-30 | 2016-06-30 | A kind of expansive soil slope reinforcement means |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201610496324.8A CN106088113A (en) | 2016-06-30 | 2016-06-30 | A kind of expansive soil slope reinforcement means |
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| CN106088113A true CN106088113A (en) | 2016-11-09 |
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| CN201610496324.8A Pending CN106088113A (en) | 2016-06-30 | 2016-06-30 | A kind of expansive soil slope reinforcement means |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108951557A (en) * | 2018-08-20 | 2018-12-07 | 云南省红河州水利水电勘察设计研究院 | A kind of hydraulic engineering irrigates, flood control dam |
| CN111691435A (en) * | 2020-06-08 | 2020-09-22 | 上海交通大学 | Expansive soil cutting slope protection method |
| CN113065185A (en) * | 2021-03-31 | 2021-07-02 | 上海交通大学 | Woven bag structure unit for protecting expansive soil slope and design method |
| CN113529757A (en) * | 2021-08-24 | 2021-10-22 | 山东省交通科学研究院 | Step type water permeability building rubbish slope supporting structure and construction method |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003082670A (en) * | 2001-09-04 | 2003-03-19 | Ibiden Greentec Co Ltd | Construction of slope face |
| CN103088834A (en) * | 2013-02-01 | 2013-05-08 | 河海大学 | Method for improving slope stability of expansive soil and controlling structural damage of expansive soil |
| CN203346895U (en) * | 2013-06-20 | 2013-12-18 | 华侨大学 | Expansion soil slope protecting structure |
| CN203403426U (en) * | 2013-08-13 | 2014-01-22 | 南昌工程学院 | Supporting structure of expensive earth road cutting side slope |
| CN203654301U (en) * | 2013-12-16 | 2014-06-18 | 华侨大学 | Expanding soil slope protection system |
| CN104264694A (en) * | 2014-09-29 | 2015-01-07 | 南京赛伯通建筑工程有限公司 | Expansive soil slope and construction method |
| CN204356788U (en) * | 2014-12-24 | 2015-05-27 | 中铁二院工程集团有限责任公司 | Flexibility subtracts swollen ecological revetment structure |
-
2016
- 2016-06-30 CN CN201610496324.8A patent/CN106088113A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003082670A (en) * | 2001-09-04 | 2003-03-19 | Ibiden Greentec Co Ltd | Construction of slope face |
| CN103088834A (en) * | 2013-02-01 | 2013-05-08 | 河海大学 | Method for improving slope stability of expansive soil and controlling structural damage of expansive soil |
| CN203346895U (en) * | 2013-06-20 | 2013-12-18 | 华侨大学 | Expansion soil slope protecting structure |
| CN203403426U (en) * | 2013-08-13 | 2014-01-22 | 南昌工程学院 | Supporting structure of expensive earth road cutting side slope |
| CN203654301U (en) * | 2013-12-16 | 2014-06-18 | 华侨大学 | Expanding soil slope protection system |
| CN104264694A (en) * | 2014-09-29 | 2015-01-07 | 南京赛伯通建筑工程有限公司 | Expansive soil slope and construction method |
| CN204356788U (en) * | 2014-12-24 | 2015-05-27 | 中铁二院工程集团有限责任公司 | Flexibility subtracts swollen ecological revetment structure |
Non-Patent Citations (1)
| Title |
|---|
| 唐咸远等: "两种柔性支护技术处治部分滑塌的膨胀岩土路堑边坡", 《公路》 * |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108951557A (en) * | 2018-08-20 | 2018-12-07 | 云南省红河州水利水电勘察设计研究院 | A kind of hydraulic engineering irrigates, flood control dam |
| CN108951557B (en) * | 2018-08-20 | 2023-09-08 | 云南省红河州水利水电勘察设计研究院 | Irrigation and flood control dam for hydraulic engineering |
| CN111691435A (en) * | 2020-06-08 | 2020-09-22 | 上海交通大学 | Expansive soil cutting slope protection method |
| CN113065185A (en) * | 2021-03-31 | 2021-07-02 | 上海交通大学 | Woven bag structure unit for protecting expansive soil slope and design method |
| CN113065185B (en) * | 2021-03-31 | 2022-10-25 | 上海交通大学 | Woven bag structure unit for protecting expansive soil slope and design method |
| CN113529757A (en) * | 2021-08-24 | 2021-10-22 | 山东省交通科学研究院 | Step type water permeability building rubbish slope supporting structure and construction method |
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Application publication date: 20161109 |