CN210262923U - Slope protection structure - Google Patents
Slope protection structure Download PDFInfo
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- CN210262923U CN210262923U CN201920841746.3U CN201920841746U CN210262923U CN 210262923 U CN210262923 U CN 210262923U CN 201920841746 U CN201920841746 U CN 201920841746U CN 210262923 U CN210262923 U CN 210262923U
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Abstract
The utility model discloses a side slope protection structure, which belongs to the technical field of riverbed protection, and comprises a shallow water seepage prevention structure and a slope top seepage prevention structure, wherein the shallow water seepage prevention structure comprises a backfill base layer, a clay filling layer, a reversed filter geotextile, a cushion layer, a steel wire gabion and a planting soil layer from bottom to top, and the backfill base layer, the clay filling layer and the cushion layer are all compacted after being paved; the steel wire stone cage comprises a steel wire net cage and stones inside the steel wire net cage. Performing primary seepage prevention on a shallow water area of a riverbed through a clay filling layer; laying reverse filtering geotextile, a cushion layer and a steel wire gabion on the shallow water area and the top of the slope, and consolidating the shallow water area of the riverbed for seepage prevention by using the water blocking performance of the reverse filtering geotextile and the clay; shallow water areas and slope tops on two sides of the riverbed are protected by the steel wire gabions, and the water impact resistance is effectively improved; adopt the utility model discloses can reduce engineering cost, adapt to river lake prevention of seepage on a large scale, be particularly useful for the prevention of seepage of the peripheral gravel and sand river course in northern city.
Description
Technical Field
The utility model relates to an environmental management technical field especially relates to a side slope protective structure.
Background
With the attention of people to the natural environment, river treatment becomes a mode of water and soil loss which is concerned by people, and conventional river treatment forms a mature treatment system, but for river channels around some northern cities, because of the limitation of geographical conditions and the influence of human intervention, no ecological base flow exists at ordinary times, the river channels mainly contain medium fine sand, the permeability is strong, and the evaporation capacity is large, so that the river channels around many northern cities are almost in a dry state all the year round, and in order to achieve the ecological restoration effect, proper artificial seepage prevention measures must be taken to ensure the water storage surface in the river channels, and the water and soil loss is reduced.
Conventional artificial anti-seepage measures generally include:
concrete seepage prevention: the anti-seepage measure is more suitable for the concrete anti-seepage main type of the artificial lake engineering with regular water body and smaller water surface area, and can be assembled by cast-in-place concrete and concrete precast blocks, and the service life can generally reach 30-50 years. The concrete seepage-proofing has the advantages of better seepage-proofing and impact-proofing properties and stronger durability, but has the defects of high construction cost, poor ecological effect and the like.
Clay seepage control: the clay seepage prevention belongs to a traditional seepage prevention method, has the characteristics of low investment and simple and convenient process for areas with high-quality clay, is favorable for ecological exchange, and has the service life of about 25 years generally. The thickness required by the clay seepage prevention is larger, so the total engineering quantity is large, and the clay seepage prevention method is more suitable for the situation of locally using materials. The Hutuo river is relatively short of the soil source along the shore region, so the cost for obtaining high-quality clay meeting the anti-seepage is high. Besides the two traditional engineering seepage-proofing types, masonry stone, asphalt concrete and the like can be used as seepage-proofing materials, but the application range and the effect of the seepage-proofing materials are generally not suitable for large-range river and lake seepage prevention, so that the seepage-proofing structure suitable for sand and stone riverways around northern cities needs to be developed and designed urgently.
SUMMERY OF THE UTILITY MODEL
The utility model aims to solve the technical problem that a side slope protective structure is provided, can effectively solve the more problem of current gravel and sand river course infiltration, can ensure the ecological effect of prevention of seepage, reduce engineering cost.
In order to solve the technical problem, the utility model discloses the technical scheme who takes is: the utility model provides a side slope protection structure, side slope protection structure lays on the shallow water district and the top of a slope of riverbed both sides, side slope protection structure includes shallow water district seepage prevention structure and top of a slope seepage prevention structure, shallow water district seepage prevention structure sets gradually backfill basic unit, clay filling layer, anti-geotechnological cloth, bed course, steel wire gabion and plants the soil layer from bottom to top, backfill basic unit, clay filling layer and bed course are all compaction after the pavement.
Preferably, the steel wire gabion comprises a steel wire net cage and stones filled in the steel wire net cage.
Further, the slope top seepage-proofing structure is located the part above the riverbed design water level, and the slope top seepage-proofing structure includes backfill base layer, anti-geotechnical cloth, bed course, steel wire gabion and planting soil layer that set up from bottom to top, and the backfill base layer, anti-geotechnical cloth, bed course, steel wire gabion and planting soil layer of slope top seepage-proofing structure are the continuous laying of backfill base layer, anti-geotechnical cloth, bed course, steel wire gabion and planting soil layer in the seepage-proofing structure of shallow water district.
Preferably, the steel wire gabion is paved on the bottom, shallow water areas on two sides and the top of a slope of a river bed and extends upwards to 2-3m of a river bank, and the thickness of the steel wire net cage is 0.3-0.4 m.
Preferably, the thickness of the cushion layer is 20-30 cm.
Adopt the produced beneficial effect of above-mentioned technical scheme to lie in: clay filling layers are paved in shallow water areas on two sides of a river bed, and the purpose of seepage prevention is achieved by using clay; the anti-filtration geotextile, the cushion layer and the steel wire gabion are laid on the shallow water area and the top of the slope, so that on one hand, the water resistance of the anti-filtration geotextile and the clay is fully exerted, on the other hand, the steel wire gabion is utilized to protect the shallow water area and the top of the slope on two sides of the riverbed, and the water resistance of the slope is effectively improved; adopt the utility model discloses also reduced engineering cost, adapted river lake prevention of seepage on a large scale, be particularly useful for the prevention of seepage of the peripheral gravel and sand river course in northern city.
Drawings
Fig. 1 is a schematic structural view of a side slope protection structure provided by the present invention;
wherein: 1. backfilling the base layer; 2. a clay cushion layer; 3. a bentonite waterproof blanket; 4. a clay protective layer; 5. filtering the geotextile; 6. a cushion layer; 7. a steel wire gabion; 8. backfilling the soil layer; 9. a clay filling layer; 10. and (5) planting a soil layer.
Detailed Description
The technical solutions in the embodiments of the present invention are clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, but the present invention may be implemented in other ways different from the specific details set forth herein, and one skilled in the art may similarly generalize the present invention without departing from the spirit of the present invention, and therefore the present invention is not limited to the specific embodiments disclosed below.
The side slope protection structure comprises a shallow water region seepage prevention structure and a slope top seepage prevention structure, wherein the shallow water region seepage prevention structure comprises a shallow water region seepage prevention structure and a slope top seepage prevention structure, the shallow water region seepage prevention structure is sequentially provided with a backfill base layer 1, a clay filling layer 9, an anti-filtration geotextile 5, a cushion layer 6, a steel wire gabion 7 and a planting soil layer 10 from bottom to top, and the backfill base layer 1, the clay filling layer 9 and the cushion layer 6 are compacted after being paved. Laying clay filling layers in shallow water areas on two sides of the riverbed, and realizing primary seepage prevention by using clay; the water blocking performance of the reversed filter geotechnical cloth and the clay is fully exerted by laying the reversed filter geotechnical cloth, the cushion layer and the steel wire gabion on the shallow water area and the top of the slope, and the shallow water areas on two sides and the top of the slope are further prevented from seepage; shallow water areas and slope tops on two sides of the riverbed are protected by the steel wire gabions, and the water-proof performance of the side slope is effectively improved; by adopting the technical scheme, the construction cost can be reduced.
The river bed waterproof structure comprises a river bottom seepage-proofing structure, a shallow water seepage-proofing structure and a slope top seepage-proofing structure, wherein the river bottom seepage-proofing structure is positioned in the middle of the river bed, and the shallow water seepage-proofing structure is positioned between the river bottom seepage-proofing structure and the slope top seepage-proofing structure; the river bottom seepage-proofing structure comprises a backfill base layer 1, a clay cushion layer 2, a bentonite waterproof blanket 3, a clay protection layer 4, a reverse filter geotextile 5, a cushion layer 6, a steel wire gabion 7 and a backfill soil layer 8 which are arranged from bottom to top, wherein the backfill base layer 1, the clay cushion layer 2, the clay protection layer 4 and the cushion layer 6 are compacted after being paved; the steel wire stone cage 7 comprises a steel wire net cage and stones filled in the steel wire net cage. The base layer is flatly backfilled at the bottom of the riverbed, and seepage prevention is realized by combining the bentonite waterproof blanket, the reverse filter geotextile and the clay, so that the water resistance of the reverse filter geotextile and the clay is fully exerted, the advantages of small influence on an ecological system and strong terrain change adaptability of the bentonite waterproof blanket are fully exerted, the service life is prolonged, and the ecological friendliness is improved. Meanwhile, the technical scheme greatly reduces the construction cost, is suitable for large-range river and lake seepage prevention, and is particularly suitable for the seepage prevention of sand and stone rivers around northern cities.
During specific implementation, the backfill base layer 1, the reverse filtration geotextile 5, the cushion layer 6 and the steel wire gabion 7 of the shallow water seepage-proofing structure are continuously paved with the backfill base layer 1, the reverse filtration geotextile 5, the cushion layer 6 and the steel wire gabion 7 of the river bottom seepage-proofing structure.
In a specific embodiment of the present invention, please refer to fig. 1, the slope top seepage-proofing structure is a part located above the designed water level of the riverbed, the slope top seepage-proofing structure comprises a backfill base layer 1, an anti-filtration geotextile 5, a cushion layer 6, a steel wire gabion 7 and a planting soil layer 10 arranged from bottom to top, and the backfill base layer 1, the anti-filtration geotextile 5, the cushion layer 6, the steel wire gabion 7 and the planting soil layer 10 of the slope top seepage-proofing structure are continuously laid of the backfill base layer 1, the anti-filtration geotextile 5, the cushion layer 6, the steel wire gabion 7 and the planting soil layer 10 in the shallow water seepage-proofing structure.
Wherein, the backfill base layers of the river bed bottom, shallow water areas on two sides and the slope top are constructed in advance, and after the clay cushion layer 2 with the river bottom seepage-proofing structure, the bentonite waterproof blanket 3 and the clay protective layer 4 are laid, the clay filling layer 9 with the shallow water area seepage-proofing structure is laid; then uniformly laying reverse filter geotextile 5, a cushion layer 6 and a steel wire gabion 7 at the bottom, shallow water areas at two sides and a slope top of the riverbed; and finally, paving planting soil layers 10 in shallow water areas and the top of the slope on two sides of the river bed. The steel wire stone cages 7 are fully paved at the bottom, shallow water areas on two sides and the top of the river bed and extend upwards to the river bank for 2-3m, and the thickness of the steel wire net cage is 0.3-0.4 m.
The thickness of the clay cushion layer 2 is 20-30cm, the thickness of the clay protective layer 4 is 30-40cm, and the thickness of the cushion layer 6 is 20-30 cm; the bentonite waterproof blankets 3 laid in the river bottom seepage-proofing structure are formed by overlapping a plurality of blocks, and the overlapping width of two adjacent bentonite waterproof blankets 3 is 50 cm. Wherein, the bentonite waterproof blanket is a sodium bentonite waterproof blanket.
In the specific construction process, the laying of the bentonite waterproof blanket is key, and the method comprises the steps of firstly carrying out backfill base layer 1 treatment, then laying a clay cushion layer 2, and finally laying the bentonite waterproof blanket 3. When the backfill base layer 1 is treated, the surface of a river bed is leveled, sundries such as stones, weeds, iron wires, tree roots and branches with the diameter larger than 2cm and garbage which can pollute the bentonite waterproof blanket are removed, the existing sand pits are backfilled in a layered rolling mode, the relative density of sand backfilling reaches 0.7, the filling compactness of the clay cushion layer 2 reaches 95%, the thickness of the lower clay cushion layer is 20cm, and the content of clay grains is not lower than 10% in order to ensure the anti-seepage effect of the sodium bentonite waterproof blanket; the upper clay protective layer is 30cm thick, and the content of clay particles is not less than 15%.
The bentonite waterproof blanket meeting the quality requirement is laid on the clay cushion layer, the waterproof blanket can adopt a standard size, each roll of the waterproof blanket is put in place by a crane according to the design requirement and then is spread by manpower, wherein the width of the bidirectional lap joint is 50cm, a proper amount of bentonite is uniformly scattered or bentonite clay is uniformly coated at the lap joint, the upstream side is ensured to be lapped on the downstream side when the waterproof blanket is lapped along the water flow direction, the bottom surface is parallelly lapped when the waterproof blanket is laid, the waterproof blanket cannot be stretched or folded in the laying process and is properly loosened and tightly attached to the ground, the slope is laid along the top and bottom direction of the slope and is parallelly lapped, the front and back surfaces of the bentonite waterproof blanket are respectively laid, the black surface is downward woven geotextile, and the white surface is upward non-woven fabric. In the laying process, if the bentonite waterproof blanket is damaged, the bentonite waterproof blanket which is larger than 300mm around a damaged gap is covered on the bentonite waterproof blanket and then is subjected to fixing treatment, in addition, the bentonite waterproof blanket is laid in a storage mode, the dryness of the bentonite waterproof blanket is guaranteed, the bentonite waterproof blanket is laid in a rainy day, and a clay protective layer is required to be implemented on the laid waterproof blanket as soon as possible.
The bentonite waterproof blanket is a geotechnical synthetic material, and is filled with high-expansibility sodium bentonite between special composite geotextile and non-woven fabrics, and is widely used in seepage-proofing projects of artificial lake waterscape, refuse landfill and the like in recent years. The impermeable performance of the bentonite waterproof blanket is between that of clay impermeable and that of a high polymer material (geomembrane), the bentonite waterproof blanket uses sodium bentonite, absorbs water with weight five times of the self weight when meeting water, the volume is expanded to more than 15-17 times of the original volume, the sodium bentonite is locked between two layers of geosynthetic materials to play a role in protection and reinforcement, and the bentonite waterproof blanket has certain integral shear strength. The bentonite waterproof blanket has the following advantages:
① compactness, wherein sodium bentonite forms a high-density diaphragm under water pressure, and when the thickness is 3mm, the water permeability is below 5 x 10-11m/s, which not only meets the anti-seepage requirement, but also has micro-permeability to ensure environmental friendliness;
② durability, because the sodium bentonite is natural inorganic material, even if the time is long or the surrounding environment changes, the aging or corrosion phenomena will not occur, so the waterproof performance is durable;
③ flexibility, the bentonite waterproof blanket can deform along with different terrains and different foundations, and has strong uneven settlement resistance and tensile strain resistance compared with other impermeable materials;
④ construction is simple, compared with other waterproof materials, the bentonite waterproof blanket construction is relatively simple, heating and sticking are not needed, and only bentonite powder, nails, gaskets and the like are needed for connection and fixation;
⑤ has strong adaptability, the bentonite waterproof blanket will not be brittle failure under cold weather conditions, can resist the cold temperature of minus 32 ℃, and the crack can be automatically closed after high temperature heating, drying and rehydration;
⑥ self-repairing property, because of the swelling property of bentonite when contacting water, the plant root system with diameter less than 2mm can be self-repaired after being punctured;
⑦ green environmental protection, bentonite is natural inorganic material, is harmless and nontoxic to human body, has no special influence on environment, and has good environmental protection performance.
Seepage prevention structure is according to the velocity of flow, according to washing away the requirement, different safeguard procedures are taken respectively at different positions, the utility model discloses the protective layer structural style of chooseing for use adopts the steel wire gabion to protect riverbed bottom and both sides shallow water district, sloping top, effectively improves river bottom waterproof performance, avoids rivers to wash the river bottom. Wherein the design thickness of the steel wire gabion is 30cm, the size of the net cage is 0.3m multiplied by 1m multiplied by 2m, and a spacer is added in the middle. The steel wire gabion is used for a near-shore shallow water area and a slope top at a water flow top flushing part, and planting soil is covered on the upper part of the steel wire gabion by 0.5 m.
In a word, the utility model realizes seepage prevention by adopting a mode of combining clay, a bentonite waterproof blanket and reversed filter geotextile in a river bottom seepage prevention structure, on one hand, the water resistance of the reversed filter geotextile and the clay is fully exerted, on the other hand, the bentonite waterproof blanket has the advantages of small influence on an ecological system and strong capability of adapting to terrain change, and the ecological friendliness is improved while the service life is prolonged; on the other hand, the steel wire gabion is adopted to protect the bottom of the riverbed, shallow water areas on two sides and the top of the riverbed slope, and the water impact resistance of the riverbed slope is effectively improved. The utility model discloses can reduce engineering cost, adapt to river lake prevention of seepage on a large scale, be particularly useful for the prevention of seepage of the peripheral sand and stone river course in northern city.
Claims (5)
1. A side slope protection structure is characterized in that: the side slope protection structure is laid on shallow water areas and slope tops of two sides of the riverbed, the side slope protection structure comprises a shallow water area seepage prevention structure and a slope top seepage prevention structure, the shallow water area seepage prevention structure is sequentially provided with a backfill base layer, a clay filling layer, an inverted filter geotextile, a cushion layer, a steel wire gabion and a planting soil layer from bottom to top, and the backfill base layer, the clay filling layer and the cushion layer are all compacted after being paved.
2. The slope protection structure of claim 1, wherein: the steel wire stone cage comprises a steel wire net cage and stones filled in the steel wire net cage.
3. The slope protection structure of claim 2, wherein: the slope top seepage-proofing structure is for lieing in the part above the riverbed design water level, and slope top seepage-proofing structure includes backfill basic unit, anti-geotechnological cloth, bed course, steel wire gabion and the planting soil layer that sets up from bottom to top, and the continuous laying of backfill basic unit, anti-geotechnological cloth, bed course, steel wire gabion and planting soil layer in the shallow water district seepage-proofing structure of slope top seepage-proofing structure is backfill basic unit, anti-geotechnological cloth, bed course, steel wire gabion and planting soil layer.
4. The slope protection structure of claim 3, wherein: the steel wire stone cage is fully paved at the bottom, shallow water areas on two sides and the top of a river bed and extends upwards to 2-3m of a river bank, and the thickness of the steel wire net cage is 0.3-0.4 m.
5. The slope protection structure of claim 4, wherein: the thickness of the cushion layer is 20-30 cm.
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| CN201920841746.3U CN210262923U (en) | 2019-06-05 | 2019-06-05 | Slope protection structure |
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| CN201920841746.3U CN210262923U (en) | 2019-06-05 | 2019-06-05 | Slope protection structure |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111676890A (en) * | 2020-04-26 | 2020-09-18 | 中国一冶集团有限公司 | Ecological reconstruction construction method for river bottom of black and odorous water body river |
| CN111749197A (en) * | 2020-05-20 | 2020-10-09 | 中国一冶集团有限公司 | Riverbank zone ecological restoration system and construction method thereof |
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2019
- 2019-06-05 CN CN201920841746.3U patent/CN210262923U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111676890A (en) * | 2020-04-26 | 2020-09-18 | 中国一冶集团有限公司 | Ecological reconstruction construction method for river bottom of black and odorous water body river |
| CN111749197A (en) * | 2020-05-20 | 2020-10-09 | 中国一冶集团有限公司 | Riverbank zone ecological restoration system and construction method thereof |
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