CN104164883B - A kind of loose unsaturated soil side slope superficial again compacting in conjunction with vegetative coverage means of defence - Google Patents
A kind of loose unsaturated soil side slope superficial again compacting in conjunction with vegetative coverage means of defence Download PDFInfo
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- CN104164883B CN104164883B CN201410329055.7A CN201410329055A CN104164883B CN 104164883 B CN104164883 B CN 104164883B CN 201410329055 A CN201410329055 A CN 201410329055A CN 104164883 B CN104164883 B CN 104164883B
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- 238000005056 compaction Methods 0.000 claims abstract description 20
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- 238000009412 basement excavation Methods 0.000 claims abstract description 12
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- 230000003628 erosive effect Effects 0.000 description 2
- 239000000945 filler Substances 0.000 description 2
- 238000005192 partition Methods 0.000 description 2
- 230000002265 prevention Effects 0.000 description 2
- 230000001681 protective effect Effects 0.000 description 2
- 102000002322 Egg Proteins Human genes 0.000 description 1
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Landscapes
- Pit Excavations, Shoring, Fill Or Stabilisation Of Slopes (AREA)
Abstract
The invention discloses a kind of loose unsaturated soil side slope superficial again compacting in conjunction with vegetative coverage means of defence.The loose residual soil thick to domatic following 2-3m or clinosol implement excavation, from the domatic length of toe upwards 1/3-1/2, and spaced set many inclined slope aspect weeper drains, french drain is all communicated with the spilled water hole of toe retaining wall; By the loose residual soil of excavation or the above degree of compaction of clinosol compaction in layers to 90%, namely form compacting covering layer again; Above compacting covering layer, laying depth is the Nutrition Soil of 0.15-0.3m again, and plants short and small vegetation.The present invention effectively can reduce rainfall infiltration, controls bottom, slope phreatic line height, keeps suction in unsaturated soil, improves soil shear strength, strengthens whole slope stability, effectively the failure by leaking of the loose unsaturated soil side slope of control.The method that the present invention relates to can be gathered materials on the spot, easily construct, cost is low, practical, and has good Effect of Ecological Restoration.
Description
Technical field
The present invention relates to the slope protection method of soil-slope, especially relate to a kind of loose unsaturated soil side slope superficial again compacting in conjunction with vegetative coverage means of defence.
Background technology
Igneous rock Weathering-residual, southwest strong earthquakes, mine tailing casting and engineering construction excavation topple over a large amount of loose unsaturated soil side slope of formation, to infiltrate by heavy showers in annual summer and affect, landslide happens occasionally, and such rainfall induced landslide has failure by leaking, the feature had a large capacity and a wide range.Existing national regulation mainly comprises for the slope protection measure of soil-slope: slope protection by masonry structure and facing wall, sash, beat face etc.Slope protection by masonry structure and facing wall main material are slabstone or block stone, and point laid dry, grouts two kinds of engineering methods, be applicable to abound with building stones area, be subject to the soil-slope that surface water washes away.Sash protection adopts concrete, grouts sheet (block) stone, ovum (gravel) stone etc. makes skeleton, should planting plants or adopt other supplemental protective measures in sash.Beating face protection is tabia, four is closed soil or cement slag composite soil etc. paves in domatic, and hand compaction forms closed impervious barrier, and the gradient being applicable to be subject to rain drop erosion delays the soil-slope in 1:0.5.Above-mentioned safeguard procedures need the exogenous materials such as a large amount of stone material, cement, domatic being difficult to formed carries out afforesting and restoration of the ecosystem, and passes in time, grouts body, concrete, tabia etc. and to be subject to drench with rain weathering and aging, even destroy, later maintenance regulation costly.Therefore engineering needs environmental protection, more durable guard technology, particularly for a large amount of loose slight slope.
Summary of the invention
In order to overcome the deficiencies in the prior art, the object of the invention be to provide a kind of loose unsaturated soil side slope superficial again compacting in conjunction with vegetative coverage means of defence.By shallow-layer again compacting improve loose ground barrier performance to reduce rainfall time infiltrate the water yield of side slope, vegetable layer contributes in the evapotranspiration of fine day the moisture that drainage infiltrates, and controls bottom, slope phreatic line height by inclined slope aspect weeper drain.Above-mentioned three measures synergy can effectively keep side slope unsaturated soil suction and shear strength, safeguards slope texture and domatic durability, and reaches good afforestation effect.
The technical solution used in the present invention step is as follows:
Step 1) implements excavation to the thick loose residual soil of domatic following 2-3m or clinosol, from the domatic length of toe upwards 1/3-1/2, and spaced set many inclined slope aspect weeper drains, french drain is all communicated with the spilled water hole of toe retaining wall;
Step 2) be loose residual soil or the above degree of compaction of clinosol compaction in layers to 90% that step 1) is excavated, namely form compacting covering layer again;
Step 3) is in step 2) the covering layer of compacting again above laying depth be the vegetable layer of 0.15-0.3m.
Described many inclined slope aspect weeper drains, every bar thickness is 0.3-0.5m, and width is 0.5-1 m, and adjacent two inclined slope aspect weeper drain spacing are 5-10m, and cobble or the rubble that particle diameter is 20-60mm is filled in french drain inside, and mud content is less than 1%, is lined with outward and spins geotextile.
When described loose residual soil or clinosol compaction in layers, every layer of virtual resurfacing thickness is 0.3-0.4m.
The spilled water hole aperture of described toe retaining wall is 0.05-0.1m.
The beneficial effect that the present invention has is:
1, by shallow-layer compacting again, the synergy of vegetative coverage, three measures of inclined slope aspect weeper drain, effectively can reduce rainfall infiltration, controls bottom, slope phreatic line height, keep unsaturation soil body suction and shear strength, effectively the failure by leaking of control loose ground side slope.
2, compacting covering layer again, the composition material overwhelming majority of vegetable layer and inclined slope aspect weeper drain three part can gather materials on the spot, the natural materials good endurance used.
3, this technology is easily constructed, cost is low, practical.
4, this method meets the theory of greening and environmental protection, has good Effect of Ecological Restoration.
Accompanying drawing explanation
Fig. 1 is concrete structure generalized section of the present invention.
Fig. 2 is the A direction view of Fig. 1.
Fig. 3 is the construction order of space partition of the present invention.
In figure: 1, top, slope catchwater, 2, loose residual soil or clinosol, 3, again compacting covering layer, 4, inclined slope aspect weeper drain, 5, be lined with and spin geotextile outward, 6, vegetable layer, 7, the spilled water hole of toe retaining wall.
Detailed description of the invention
Below in conjunction with drawings and Examples, the present invention is further illustrated.
As shown in Figure 1 and Figure 2, after the present invention excavates the thick loose residual soil of domatic following 2-3m or clinosol 2, the domatic length of upwards 1/3-1/2 at the bottom of slope, spaced set many inclined slope aspect weeper drains 4, french drain 4 is all communicated with the spilled water hole 7 of toe retaining wall, and top, slope is provided with a slope parallel with toe retaining wall and pushes up catchwater 1;
Step 2) be loose residual soil or the above degree of compaction of clinosol 2 compaction in layers to 90% that step 1) is excavated, namely form compacting covering layer 3 again;
Step 3) is in step 2) the covering layer of compacting again 3 above laying depth be the Nutrition Soil of 0.15-0.3m and plant ground controlled approach, form vegetable layer 6, vegetable layer 6 kinds is planted and is adapted to local climate condition and have grass or the stunted brushwood of good erosion resistibility.
Described many inclined slope aspect weeper drains 4, every bar thickness is 0.3-0.5m, and width is 0.5-1m, and adjacent two inclined slope aspect weeper drain 4 spacing are 5-10m, and cobble or the rubble that particle diameter is 20-60mm is filled in french drain inside, and mud content is less than 1%, is lined with outward and spins geotextile 5;
When described loose residual soil or clinosol 2 compaction in layers, every layer of virtual resurfacing thickness is 0.3-0.4m.
Spilled water hole 7 aperture of described toe retaining wall is 0.05-0.1m.
Means of defence principle of the present invention is such:
By the loose residual soil of domatic following 2-3m or clinosol 2 are excavated compacting again, improve compactness, reduce the porosity of the loose residual soil of shallow-layer or clinosol 2.The effect of compaction treatment comprises two aspects again: a transmission coefficient being reduction of shallow-layer loose ground, the transmission coefficient of compacting covering layer 3 is than former loose residual soil or low at least one the order of magnitude of clinosol 2 again, when therefore significantly reducing rainfall, rainwater infiltrates slope body, major part rainfall is converted into surface flow, the minimizing of rainfall infiltration contributes to keeping suction and shear strength in side slope unsaturated soil, effectively reduces rainfall to the adverse effect of side slope shallow soil body stability; Two is the globality and the shear strength that improve shallow-layer loose ground by excavating compacting again, further increases the stability of the side slope superficial soil body.Slope vegetation layer 6 plays when rainfall and conserves water and soil, and avoids domatic effect of too washing away; After rainfall stops, the moisture that vegetable layer 6 was infiltrated by the evapotranspiration continuous drainage rainy day, makes rainfall infiltration cause the suction losses of the shallow-layer soil body to be restored, thus eliminates rainfall to the adverse effect of side slope shallow soil body stability.The moisture side direction guide accumulated by toe of inclined slope aspect weeper drain 4 is discharged to the spilled water hole 7 of toe retaining wall, controls bottom, slope phreatic line height, effectively solves toe local buckling problem.Infiltrate the water yield of side slope when effectively reducing rainfall by the synergy of above-mentioned three measures, keep the suction of slope soil to be greater than critical suction corresponding to the softening destruction of water suction, safeguard slope texture and domatic durability, and reach good afforestation effect.
As shown in Figure 1, Figure 2, Figure 3 shows, embodiments of the present invention: select, in construction in dry season, along the construction of domatic space partition from left to right, to excavate from top to bottom in single construction section, compacting from bottom to top, as shown in Figure 3.To domatic longer sides slope, the section construction of single section, arranges packway between adjacent segment.Concrete construction method in selected construction section: top, (1) slope is provided with a slope parallel with toe retaining wall and pushes up catchwater 1; (2) the loose residual soil of domatic for excavation construction district following 2-3m or clinosol 2 are dug out from top to bottom, be deposited in interim mound district for subsequent use; (3) the excavation bottom surface in smooth excavation construction district, digs the dark groove of 0.3-0.5m under inclined slope aspect weeper drain 4 position is further, fills cobble or rubble that particle diameter is 20-60mm, is lined with outward and spins geotextile 5, namely form inclined slope aspect weeper drain 4 in groove; (4) the loose residual soil dug out in (1) or clinosol 2 are backfilled again, the above degree of compaction of compaction in layers to 90% from bottom to top, namely form compacting covering layer 3 again; (5) by the interim mound district of requirement excavation in (1), the loose residual soil dug out or clinosol 2 are deposited on the covering layer of compacting again 3 in excavation construction district; (6) interim mound district is by (3), and (4) require construction, lays Nutrition Soil simultaneously and plants grass planting or stunted brushwood, namely form vegetable layer 6 on the covering layer of compacting again 3 in excavation construction district; (7) excavate non-excavation area by requirement in (1), the loose residual soil dug out or clinosol 2 are deposited on the covering layer of compacting again 3 in interim mound district, and subsequent construction, by above-mentioned requirements iterative method, repeats no more.
Describe the present invention in detail according to drawings and embodiments below, object of the present invention and effect will become more obvious.
embodiment 1
Be positioned at Beijing-Fuzhou expressway Nan Ping section one residual soil high-filled embankment, the domatic following soil layer of this side slope of embankment is followed successively by: 5 m thick loose lam, the thick gravelly soil of 2.6 m, 2.6 m thick chiltern cohesive soil, the severely-weathered packsand of the thick chunky shape of 1.8 m, the thick weak weathering packsand of 1.8 m.This residual soil embankment construction quality is poor, and degree of compaction is low, and side slope superficial bankets and is in loose condition (of surface).This project is positioned at moist climate region, and heavy showers in summer has caused part way side slope of embankment stability failure and slide, has a strong impact on embankment safety.
Prevention and controls of the present invention is adopted to administer this residual soil side slope of embankment.Domatic following 3m thick loose lam is excavated from top to bottom along domatic, at digging process, stone is picked independent stacking, be ready for use on weeper drain filler.Along road direction, inclined slope aspect weeper drain is set by 10m spacing, french drain upwards excavates construction from toe, length is 1/2 of domatic length, degree of depth 0.5m, width 1m, the stone picked in inner filling digging process, stone particle diameter being greater than to 60mm is filled out after fragmentation again, control mud content and be less than 1%, after french drain filling, outer lining Woven geofabric is as loaded filter.Toe builds 2m height stone masonry retaining wall, and retaining wall bottom arranges spilled water hole and is communicated with inclined slope aspect weeper drain, spilled water hole diameter 0.1m.By the loose lam backfill consolidation in layers dug out, control degree of compaction and be not less than 90 %, during compaction in layers, every layer of virtual resurfacing thickness is 0.3m.Pave above compacting covering layer again 0.15m Nutrition Soil and plant bermudagrass grass formed vegetable layer.After administering, embankment slope stability significantly improves, and by summer, heavy showers tested for many years, unstable failure does not occur.
embodiment 2:
Be positioned at grand celebration-speedway Jiangxi, Guangzhou Li Ren-Longnan section one granite residual soil cutting.Cut slope soil layer is respectively from top to bottom: thick cultivated of 0.5m grows soil, Weathered Granite that 2m is thick remains containing gravel silty clay, broken weathering granite that thickness is larger.Side slope superficial is ploughed and is grown soil and be loose unsaturated soil containing gravel silty clay, and water permeability is strong, under intense rainfall condition, unstability landslide easily occurs.
Adopt this residual soil cut slope of prevention and controls process of the present invention.Ploughed by shallow-layer 2.5m and grow soil and all excavate from top to bottom along domatic containing gravel silty clay, the cultivated soil of growing dug out is stacked separately and is ready for use on nutrition soil layer and lays.At digging process, stone is picked independent stacking, be ready for use on weeper drain filler.5m spaced set inclined slope aspect weeper drain is pressed along road direction, french drain upwards excavates construction from toe, length is 1/3 of domatic length, degree of depth 0.3m, wide 0.5m, the stone picked in inner filling digging process, controls particle diameter between 35-60m, mud content is less than 1%, and after french drain filling, outer lining Woven geofabric is as loaded filter.Toe builds 1.5m high concrete barricade, and barricade bottom arranges spilled water hole and is communicated with inclined slope aspect weeper drain, spilled water hole diameter 0.05m.By the silty clay backfill consolidation in layers dug out, control degree of compaction and be not less than 90%, during compaction in layers, every layer of virtual resurfacing thickness is 0.4m.And then backfill dig out cultivatedly grow soil, after compacting, thickness is 0.3m, ploughs to grow soil plants Korea lawn grass form vegetable layer in backfill.By above-mentioned shallow-layer, compacting is in conjunction with vegetative coverage protective treatment again, and this stable slope significantly improves, and has good afforestation effect, runs and for many years unstability does not occur.
Above-described embodiment is used for explaining and the present invention is described, instead of limits the invention, and in the protection domain of spirit of the present invention and claim, any amendment make the present invention and change, all fall into protection scope of the present invention.
Claims (3)
1. compacting is in conjunction with a vegetative coverage means of defence again for loose unsaturated soil side slope superficial, and the step of the method is as follows:
Step 1) implements excavation to the thick loose residual soil of domatic following 2-3m or clinosol, from the domatic length of toe upwards 1/3-1/2, and spaced set many inclined slope aspect weeper drains, french drain is all communicated with the spilled water hole of toe retaining wall;
Step 2) be loose residual soil or the above degree of compaction of clinosol compaction in layers to 90% that step 1) is excavated, namely form compacting covering layer again;
Step 3) is in step 2) the covering layer of compacting again above laying depth be the Nutrition Soil of 0.15-0.3m, and plant short and small vegetation; Described many inclined slope aspect weeper drains, every bar thickness is 0.3-0.5m, and width is 0.5-1 m, and adjacent two inclined slope aspect weeper drain spacing are 5-10m, and cobble or the rubble that particle diameter is 20-60mm is filled in french drain inside, and mud content is less than 1%, is lined with outward and spins geotextile.
2. the loose unsaturated soil side slope superficial of one according to claim 1 again compacting in conjunction with vegetative coverage means of defence, it is characterized in that: when described loose residual soil or clinosol compaction in layers, every layer of virtual resurfacing thickness is 0.3-0.4m.
3. the loose unsaturated soil side slope superficial of one according to claim 1 again compacting in conjunction with vegetative coverage means of defence, it is characterized in that: the spilled water hole aperture of described toe place retaining wall is 0.05-0.1m.
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| CN201410329055.7A CN104164883B (en) | 2014-07-11 | 2014-07-11 | A kind of loose unsaturated soil side slope superficial again compacting in conjunction with vegetative coverage means of defence |
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| CN201410329055.7A CN104164883B (en) | 2014-07-11 | 2014-07-11 | A kind of loose unsaturated soil side slope superficial again compacting in conjunction with vegetative coverage means of defence |
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| CN104164883B true CN104164883B (en) | 2015-10-07 |
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| CN104823675B (en) * | 2015-05-19 | 2017-03-22 | 上海交通大学 | Production method for pure turf without culture substrate |
| CN113068570A (en) * | 2021-04-08 | 2021-07-06 | 西北农林科技大学 | Vegetation configuration method for controlling water and soil loss of alpine slope |
| CN115007633B (en) | 2022-06-14 | 2023-03-14 | 贵州大学 | In-situ repair method for lead-zinc waste residue storage yard |
| CN115012455B (en) * | 2022-06-30 | 2023-04-14 | 福州大学 | Capillary blocking type covering layer for promoting interception drainage and uniform distribution of landfill gas |
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|---|---|---|---|---|
| KR100419883B1 (en) * | 2002-09-14 | 2004-02-26 | 케이지건설(주) | Method for constructing green reinforcement slope; R, S Green |
| CN1632240A (en) * | 2004-11-23 | 2005-06-29 | 陈永烽 | Method for treating slope slide through modified reinforcement soil blind grids |
| CN101148886A (en) * | 2007-11-13 | 2008-03-26 | 中冶长天国际工程有限责任公司 | Drainage treatment structure for unbuilt or abuilding landfill slope underground water |
| CN103572765A (en) * | 2013-11-19 | 2014-02-12 | 成军 | Treatment and construction method of bridge site river bank expansive soil landslide positions |
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2014
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100419883B1 (en) * | 2002-09-14 | 2004-02-26 | 케이지건설(주) | Method for constructing green reinforcement slope; R, S Green |
| CN1632240A (en) * | 2004-11-23 | 2005-06-29 | 陈永烽 | Method for treating slope slide through modified reinforcement soil blind grids |
| CN101148886A (en) * | 2007-11-13 | 2008-03-26 | 中冶长天国际工程有限责任公司 | Drainage treatment structure for unbuilt or abuilding landfill slope underground water |
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Non-Patent Citations (1)
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Inventor after: Zhan Liangtong Inventor after: Liu Xiaochuan Inventor after: Qiu Qingwen Inventor after: Chen Yunmin Inventor before: Zhan Liangtong Inventor before: Liu Xiaochuan Inventor before: Chen Yunmin |
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