CN216515649U - Expansive soil or freeze thawing frozen expansive soil slope protection structure - Google Patents
Expansive soil or freeze thawing frozen expansive soil slope protection structure Download PDFInfo
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- CN216515649U CN216515649U CN202121970559.9U CN202121970559U CN216515649U CN 216515649 U CN216515649 U CN 216515649U CN 202121970559 U CN202121970559 U CN 202121970559U CN 216515649 U CN216515649 U CN 216515649U
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- 239000002689 soil Substances 0.000 title claims abstract description 121
- 238000010257 thawing Methods 0.000 title claims description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 108
- 239000000463 material Substances 0.000 claims abstract description 46
- 230000007246 mechanism Effects 0.000 claims abstract description 31
- 239000004746 geotextile Substances 0.000 claims description 7
- 238000004873 anchoring Methods 0.000 claims description 5
- 230000008961 swelling Effects 0.000 claims description 5
- 238000001914 filtration Methods 0.000 claims description 4
- 230000002093 peripheral effect Effects 0.000 claims description 4
- 238000000429 assembly Methods 0.000 claims description 3
- 230000000712 assembly Effects 0.000 claims description 3
- 230000001681 protective effect Effects 0.000 claims description 2
- 230000000087 stabilizing effect Effects 0.000 claims description 2
- 239000000126 substance Substances 0.000 claims description 2
- 230000015572 biosynthetic process Effects 0.000 abstract description 4
- 238000000034 method Methods 0.000 abstract description 3
- 239000010410 layer Substances 0.000 description 18
- 239000000440 bentonite Substances 0.000 description 12
- 229910000278 bentonite Inorganic materials 0.000 description 12
- SVPXDRXYRYOSEX-UHFFFAOYSA-N bentoquatam Chemical compound O.O=[Si]=O.O=[Al]O[Al]=O SVPXDRXYRYOSEX-UHFFFAOYSA-N 0.000 description 12
- 239000012791 sliding layer Substances 0.000 description 4
- 238000005336 cracking Methods 0.000 description 3
- 230000008595 infiltration Effects 0.000 description 3
- 238000001764 infiltration Methods 0.000 description 3
- 229920003023 plastic Polymers 0.000 description 3
- 239000004033 plastic Substances 0.000 description 3
- 239000004698 Polyethylene Substances 0.000 description 2
- 230000006378 damage Effects 0.000 description 2
- 230000008014 freezing Effects 0.000 description 2
- 238000007710 freezing Methods 0.000 description 2
- 230000005484 gravity Effects 0.000 description 2
- 239000003673 groundwater Substances 0.000 description 2
- 238000002844 melting Methods 0.000 description 2
- 230000008018 melting Effects 0.000 description 2
- 230000005012 migration Effects 0.000 description 2
- 238000013508 migration Methods 0.000 description 2
- -1 polyethylene Polymers 0.000 description 2
- 229920000573 polyethylene Polymers 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 230000001932 seasonal effect Effects 0.000 description 2
- 239000002344 surface layer Substances 0.000 description 2
- 239000002352 surface water Substances 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000008602 contraction Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
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- 238000006073 displacement reaction Methods 0.000 description 1
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- 239000011229 interlayer Substances 0.000 description 1
- 230000002262 irrigation Effects 0.000 description 1
- 238000003973 irrigation Methods 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000010309 melting process Methods 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
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- 239000010959 steel Substances 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
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Abstract
The utility model belongs to the technical field of water conservancy building engineering, and particularly relates to a side slope protection structure for expansive soil or frozen and thawed expansive soil. The main technical scheme is as follows: the method comprises the steps of arranging underground water permeable pipes in soil foundations forming the side slope, arranging drainage check valves and underground water forced drainage mechanisms, laying anti-seepage base materials and the like, so that the anti-seepage base materials are laid on the top of the slope, the slope and the bottom of the slope, and the slope and the bottom of the slope are provided with expansive soil or frozen and thawed frost heaving soil side slope protection structures formed by the underground water forced drainage mechanisms and the side slope lining structures. According to the side slope protection structure, the anti-seepage base material is extended and paved to the top of the side slope structure, so that a relatively dry soil foundation area is formed between the top of the slope and the slope, the formation of a slip layer structure on the surface of expansive soil or hydrous freeze-thaw frost-heaving soil in the area is effectively avoided, and meanwhile, the anti-seepage base material is anchored. Effectively ensuring the stability of the side slope.
Description
Technical Field
The utility model belongs to the technical field of water conservancy building engineering, and particularly relates to a side slope protection structure of expansive soil or freeze-thaw frost expansive soil.
Background
The side slopes comprise water delivery channel side slopes constructed by pairs of west lines, middle lines and east lines distributed in the west and east of China in the south-to-north water transfer mode, various large, medium and small-sized water channel reservoir side slopes constructed in various regions of China for agricultural irrigation, and engineering side slopes formed by constructing railways and road ravine-splitting filling. In the operation process of the slope projects, underground water in a slope body of the formed slope cannot be effectively treated, and the project slope can deform and collapse. The side slope is particularly the side slope with expansive soil as soil foundation and the side slope with freeze-thaw frost heaving soil foundation ditch used in the regions with higher latitude, and the groundwater in the soil foundation of the side slope is more harmful to the side slope.
The bentonite is a special rock soil base, and is unsaturated soil with multiple cracking property, strong expansion and contraction property and strength attenuation property, namely the bentonite is infiltrated to the depth of about 0.8-1.2 m to form a fixed bentonite layer, and the bentonite layer is easy to slide with a structural layer without water immersion to form a surface sliding layer structure, so that the conditions of structural cracking, deformation, slope instability and the like are caused. In the natural environment, the water absorption and water loss of the bentonite slope occur repeatedly along with seasons, rainfall and the like, so that the strength attenuation caused by the swelling and shrinkage deformation of the soil-based structure is caused, and the slope protection structure is potentially damaged for a long time. Meanwhile, landslide disasters of the bentonite (expansive) soil side slope have the characteristics of shallow layer property, traction property, smoothness, long-term property and seasonality, so that the bentonite (expansive) soil side slope is more difficult to control and protect.
Meanwhile, because the water channel used in the high latitude area is seasonal water delivery, in the cold winter when water is cut off, water in the soil of the channel soil foundation is frozen into ice in the freezing process, and a plurality of ice interlayers and ice mirror bodies are generated to form a frozen swelling soil structure. The phenomenon of relative displacement of soil particles caused by frost heaving soil, resulting in expansion of soil foundation, is called frost heaving. The appearance phenomenon of frost heaving is uniform or non-uniform swelling, bulging, cracking and the like of the soil layer; after melting, the steel plate is obviously sunk, so that the slope structure is damaged.
It is known that, in both bentonite and frozen/thawed/frozen swelled soil as a side slope soil base, groundwater (or infiltration water) contained therein is not effectively discharged, and a diseased side slope is formed, which may cause damage to the side slope and a canal.
SUMMERY OF THE UTILITY MODEL
The utility model aims to provide a side slope protection structure of expansive soil or freeze-thaw frost heaving soil, which can effectively treat the harm caused by expansion or freeze-thaw frost heaving.
In order to achieve the purpose, the technical scheme adopted by the utility model is as follows:
the utility model provides an inflation soil or freeze thawing frozen swelling soil side slope protective structure which characterized in that: the underground water forced drainage system comprises an anti-seepage base material paved on a slope top, a slope and a slope bottom, wherein underground water forced drainage mechanisms are arranged on the slope and the slope bottom, and a side slope lining structure is arranged on the outer side surface of the anti-seepage base material; wherein the content of the first and second substances,
the end part of the seepage-proofing base material paved on the slope top is fixed with the soil foundation forming the slope top;
the structure of the underground water forced drainage mechanism comprises a water collecting tank body which is arranged in the soil foundation and provided with water collecting holes on the peripheral side and is used for collecting underground water and a drainage pump mechanism which is matched with the water collecting tank body and can forcibly drain collected water.
The additional technical characteristics of the expansive soil or freeze-thaw frost expansive soil side slope protection structure further comprise:
the anti-seepage base material comprises an anti-seepage base material body and a support structure which is formed by a plurality of side-by-side support assemblies and is arranged on the inner side surface of the anti-seepage base material body at intervals or continuously, and a geotextile layer with water seepage performance is arranged outside the support structure; a water flowing channel is formed between the supporting mechanism and the geotextile;
the slope and the slope bottom are respectively provided with a drainage check valve, and the position of the drainage check valve arranged on the slope is higher than that of the underground water forced drainage mechanism;
a water gathering structure obliquely inserted into the deep part of the soil foundation is arranged on the valve body of the slope drainage check valve;
a water collecting tank body of the slope forced-drainage mechanism is provided with a second water collecting structure which is obliquely inserted into the deep part of the soil foundation;
the water-gathering structure is formed by water-permeable pipelines provided with water-permeable holes;
the water collecting structure consists of a water collecting groove, a water filtering material filled in the water collecting groove and a water permeable pipeline;
the end part of the anti-seepage base material paved on the slope top is deeply inserted into the soil foundation of the slope top;
-the end of the topsides impervious substrate extends at least 0.5 meters into the topsides foundation;
the end part of the slope top seepage-proofing base material is deeply inserted into the slope top soil foundation and is fixed through an anchoring piece;
and a fixing foot is arranged at the junction of the bottom of the side slope and the slope bottom and is used for stabilizing the lining structure.
Compared with the prior art, the expansive soil or freeze-thaw frost heaving soil slope protection structure provided by the utility model has the following advantages: firstly, because the anti-seepage base material is extended and paved to the top of the side slope structure, the slope and the bottom of the slope are provided with the underground water forced-drainage mechanism, the water in the side slope soil foundation can be forcibly drained, so that a relatively dry soil foundation area is formed between the top of the slope and the slope, the formation of a sliding layer structure on the surface of expansive soil or water-containing freeze-thaw frost-expansive soil in the area is effectively avoided, the occurrence of a gliding phenomenon is effectively avoided, and meanwhile, the anti-seepage base material is anchored, so that the anti-seepage base material can bear the gliding force formed by the gravity of the lining structure, and the safety of the side slope lining structure is ensured; and secondly, because the water collecting box body of the valve body of the slope part drainage check valve and the slope part forced drainage mechanism is provided with the water collecting structure which is obliquely inserted into the deep part of the slope soil foundation, free water in the slope soil foundation can be effectively discharged through seepage, the migration of water is guided purposefully, in addition, the water collecting and penetrating pipe can realize the anchoring effect on the slope structure, and the stability of the slope is further enhanced.
Drawings
FIG. 1 is a schematic cross-sectional structure view of an expansive soil foundation slope protection structure;
FIG. 2 is a schematic cross-sectional structure view of a slope protection structure of a frozen and thawed frost heaving soil foundation;
fig. 3 is a schematic cross-sectional structure diagram of the impermeable base material in the slope protection structure.
Detailed Description
The structure and the working principle of the slope protection structure of expansive soil or frozen and thawed expansive soil provided by the utility model are further described in detail with reference to the accompanying drawings.
As shown in fig. 1, the cross-sectional structure of the bentonite soil base slope protection structure provided by the utility model is schematically shown. The side slope protection structure comprises an anti-seepage base material 2 which is formed by plastic materials such as polyethylene and is paved on a top soil foundation 11, a slope surface soil foundation 12 and a bottom soil foundation 13 of a slope in an extending way, underground water forced drainage mechanisms 31 and 32 are respectively arranged on the slope and the bottom of the slope forming the side slope, and each underground water forced drainage mechanism comprises a water collection tank body 302 which is arranged in the soil foundations 12 and 13 and is provided with water collection holes 301 on the peripheral side for collecting underground water and a drainage pump mechanism 303 which is matched with the water collection tank body and can discharge collected water in a forced way; a side slope lining structure 4 formed by lightweight concrete is arranged on the lengthened protection area of the slope top, the slope surface and the outer side surface of the anti-seepage base material of the slope bottom; wherein, the end part 20 of the anti-seepage base material paved on the top of the slope is fixed with the soil foundation 11 on the top of the slope through an anchoring mechanism 21.
The side slope protection structure is particularly suitable for the side slope of the bentonite soil base, and the mechanism is as follows: the anti-seepage base material which is only paved on the slope surface soil foundation and the slope bottom soil foundation in the prior art and is formed by plastic materials such as polyethylene and the like is extended and paved on the slope top soil foundation, so that the infiltration of surface water at the top of the slope can be effectively prevented, the side slope soil foundation formed between the slope top and the slope surface of the side slope forms a relatively dry soil foundation area A, the formation of a sliding layer structure on the surface of bentonite or water-containing frost heaving soil is effectively avoided, the occurrence of the gliding phenomenon is effectively overcome, and meanwhile, the anti-seepage base material is anchored, so that the gliding force of the structure for preventing the lining can be greatly enhanced, and the safety of the side slope lining structure is ensured. In the above slope protection structure, the slope and the slope bottom of the slope are respectively provided with the underground water forced drainage mechanisms 31 and 32, so that the slope can collect surface water permeating into the slope soil foundation and underground water in the slope soil foundation into the water collection tank body 302 through the water collection holes 301 arranged on the peripheral sides of the slope in operation (water channel water delivery), and the drainage pump mechanism 303 can be forcibly discharged by matching with the water collection holes, so that the water level in the soil foundation of the slope can be effectively reduced, and the slope can not slide due to erosion instability of the underground water with high water level.
In the construction of the expansive soil or freeze-thaw frost-expansive soil side slope protection structure,
the slope and the slope bottom are respectively provided with the drainage check valves 51 and 52, and the drainage check valve 51 arranged on the slope is higher than the underground water forced drainage mechanism 31; the arrangement of the drainage check valves 51 and 52 aims to solve the problem of draining the underground water when the underground water forced drainage mechanisms 31 and 32 are not forced to drain (forced drainage is seasonal, forced drainage is generally carried out between 9 months and 10 months when the water in a ditch is cut off, and the drainage pump mechanism 303 forming the forced drainage mechanism is removed in cold winter); when the underground water forced drainage mechanism 31 is in a rich water season in the side slope soil foundation, the underground water forced drainage mechanism 31 at a lower position can collect more water seepage and discharge the water seepage forcibly so as to ensure low water holding capacity in the side slope soil foundation;
in order to adapt the slope structure to the northern area of high latitude, a water gathering structure 61 obliquely inserted into the deep of the soil foundation 11 is arranged on the valve body of the slope drainage check valve 51 as shown in fig. 2; the structure of the water-collecting structure 61 preferably includes a water-collecting groove 601, a water-filtering material 604 such as backfill gravel or medium coarse sand capable of effectively collecting seepage water, and a water-permeable pipe 603 laid in the groove 601 and externally wrapped with a water-permeable geotechnical material 602; this water collection structure can be to the percolating water that gathers through the filtration back, discharge in the drainage check valve or the water collecting tank is flowed into by the permeable pipeline of slant setting. The water content of the soil foundation of the side slope is a main factor influencing the freeze thawing and frost heaving conditions of the soil foundation, and the structure is used for discharging free water in the soil foundation of the side slope through seepage and purposefully guiding the migration of water; meanwhile, by utilizing the characteristic that the soil foundation freezing and melting processes are carried out layer by layer, when the slope top and the side slope are melted layer by layer, the anchoring mechanism 21 is deeply buried in the slope top soil foundation and is still in a frozen state, so that the effective fixation of the anti-seepage base materials on the slope top and the side slope can be effectively realized, and the gliding force of a slope surface formed by melting the surface layer of the whole side slope is born; and when the soil base on the top of the slope is completely melted, the water held by the soil base on the top of the slope and the surface layer of the side slope is seeped or evaporated to form a stable layer. The water-permeable pipe for collecting water is adopted to anchor the side slope, so that the stability of the side slope can be further enhanced, and the self-bearing capacity of the lining structure of the side slope is enhanced by utilizing the high-strength characteristic of the high-strength composite geomembrane;
in order to further improve the effective discharge of seepage water and freeze-thaw water in the slope soil foundation, a second water collecting structure 62 which is obliquely inserted into the deep part of the slope soil foundation and has the same structure as the water collecting structure 61 is arranged on the water collecting tank body 302 of the slope strong drainage mechanism, so that the effective discharge of seepage water and freeze-thaw water in the slope soil foundation can be further improved, and the service life of the slope is prolonged;
because the infiltration depth of the bentonite (swelled) soil is generally 0.5-1.2 m and the depth of the frozen soil is about two m, the end part 20 of the anti-seepage base material 2 laid on the top of the slope is preferably at least 0.5 m deep into the soil foundation of the top of the slope, so that a relatively dry integral slope area A is formed between the top of the slope and the slope by the anti-seepage base material 2 in a surrounding way, the formation of a sliding layer structure on the surface of the frozen swelled soil containing water is effectively avoided, the occurrence of a gliding phenomenon is effectively avoided, meanwhile, the anti-seepage base material is anchored, an anti-tensile integral body can be effectively formed, the anti-tensile integral body has a gliding force formed by bearing the gravity of the side slope lining structure 4, and the safety of the side slope lining structure is ensured;
-fixing feet 14, preferably concrete, are provided at the interface between the foundation 12 of the slope and the foundation 13 of the bottom of the slope, for fixing the lining structure 4 on the slope;
the impermeable base material laid on the top, the bottom and the slope of the side slope may be:
the geomembrane provided with the reinforcing layer is mainly used for preventing canal water of a canal formed by a side slope from permeating the soil foundation of the side slope, and has better seepage-proofing performance; secondly, because the reinforced layer for improving the tensile strength of the geotechnical film layer is arranged on the geotechnical film layer, the liner structure can bear the gliding force of the liner structure arranged on the geotechnical film layer, and the safety of the slope liner structure is ensured;
the impermeable base material can also be a structure as shown in fig. 3, namely, the impermeable base material comprises an impermeable base material body 21 formed by plastic materials and a supporting structure formed by a plurality of side-by-side supporting assemblies 22 arranged on the inner side surface of the impermeable base material body at intervals or continuously, a geotextile layer 23 with water permeability is arranged outside the supporting structure, and a water flowing channel 24 is formed between the supporting structure and the geotextile; the seepage water and the underground water in the soil foundation forming the side slope enter the water flowing channel through the geotextile layer and are collected into the drainage check valve 51 or/and the underground water forced drainage mechanism 31 to be discharged.
Claims (11)
1. The utility model provides an inflation soil or freeze thawing frozen swelling soil side slope protective structure which characterized in that: the underground water forced drainage system comprises an anti-seepage base material paved on a slope top, a slope and a slope bottom, wherein underground water forced drainage mechanisms are arranged on the slope and the slope bottom, and a side slope lining structure is arranged on the outer side surface of the anti-seepage base material; wherein the content of the first and second substances,
the end part of the anti-seepage base material paved on the slope top is fixed with the soil foundation forming the slope top;
the structure of the underground water forced drainage mechanism comprises a water collecting tank body which is arranged in the soil foundation and provided with water collecting holes on the peripheral side and is used for collecting underground water and a drainage pump mechanism which is matched with the water collecting tank body and can forcibly drain collected water.
2. The expansive soil or freeze-thaw frost expansive soil slope protection structure according to claim 1, wherein: the anti-seepage base material comprises an anti-seepage base material body and a supporting structure which is formed by a plurality of side-by-side supporting assemblies and is arranged on the inner side surface of the anti-seepage base material body at intervals or continuously, and a geotextile layer with water seepage performance is arranged outside the supporting structure; and a water flowing channel is formed between the supporting structure and the geotextile.
3. The expansive soil or freeze-thaw frost expansive soil slope protection structure according to claim 1, wherein: the slope and the slope bottom are respectively provided with a drainage check valve, and the drainage check valve arranged on the slope is higher than the underground water forced drainage mechanism.
4. The expansive soil or freeze-thaw frost expansive soil slope protection structure according to claim 3, wherein: and a water gathering structure obliquely inserted into the deep soil foundation is arranged on the valve body of the drainage check valve.
5. The expansive soil or freeze-thaw frost expansive soil slope protection structure according to claim 1, wherein: and a water collecting tank body of the slope forced-drainage mechanism is provided with a second water collecting structure which is obliquely inserted into the deep part of the soil foundation.
6. The expansive soil or freeze-thaw frost expansive soil slope protecting structure according to claim 4 or 5, wherein: the water-gathering structure is composed of water-permeable pipelines provided with water-permeable holes.
7. The expansive soil or freeze-thaw frost expansive soil slope protecting structure according to claim 4 or 5, wherein: the water-gathering structure is composed of a water-collecting groove, a water-filtering material filled in the water-collecting groove and a water-permeable pipeline.
8. The expansive soil or freeze-thaw frost expansive soil slope protection structure according to claim 1, wherein: the end part of the anti-seepage base material laid on the slope top is deep into the soil foundation of the slope top.
9. The expansive soil or freeze-thaw frost expansive soil slope protection structure according to claim 1, wherein: the end part of the slope top seepage-proofing base material is deep into the slope top soil foundation by at least 0.5 m.
10. The expansive soil or freeze-thaw frost expansive soil slope protection structure according to claim 9, wherein: the end part of the slope top seepage-proofing base material is fixed through an anchoring part.
11. The expansive soil or freeze-thaw frost expansive soil slope protection structure according to claim 1, wherein: and a fixing foot is arranged at the junction of the bottom of the side slope and the slope bottom and is used for stabilizing the lining structure.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202121970559.9U CN216515649U (en) | 2021-08-20 | 2021-08-20 | Expansive soil or freeze thawing frozen expansive soil slope protection structure |
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| CN202121970559.9U CN216515649U (en) | 2021-08-20 | 2021-08-20 | Expansive soil or freeze thawing frozen expansive soil slope protection structure |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117588603A (en) * | 2024-01-18 | 2024-02-23 | 衡水道一工程材料有限公司 | Warm water overflow pipe and severe cold region water delivery channel protection system comprising same |
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2021
- 2021-08-20 CN CN202121970559.9U patent/CN216515649U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117588603A (en) * | 2024-01-18 | 2024-02-23 | 衡水道一工程材料有限公司 | Warm water overflow pipe and severe cold region water delivery channel protection system comprising same |
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Assignee: Dezhou Huanjing Landscape Environment Co.,Ltd. Assignor: Hengshui Dao I Engineering Materials Co.,Ltd. Contract record no.: X2024980001057 Denomination of utility model: A slope protection structure for expansive soil or freeze-thaw frozen expansive soil Granted publication date: 20220513 License type: Common License Record date: 20240118 |