CN209873823U - Impervious protective structure of embankment side slope soaks - Google Patents
Impervious protective structure of embankment side slope soaks Download PDFInfo
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- CN209873823U CN209873823U CN201920414856.1U CN201920414856U CN209873823U CN 209873823 U CN209873823 U CN 209873823U CN 201920414856 U CN201920414856 U CN 201920414856U CN 209873823 U CN209873823 U CN 209873823U
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Abstract
The utility model relates to the technical field of side slope protection, and discloses a side slope anti-seepage protective structure of a submerged embankment, which comprises a foundation, seepage geotextile, a gravel reverse filter layer, seepage-proof geotextile, stone concrete and a one-way water drain pipe; the foundation is arranged at the bottom of the embankment, and the bottom surface of the foundation is embedded into a riverbed; the seepage geotextile, the gravel reverse filter layer and the seepage-proof geotextile are arranged from the top surface of the foundation to the top in sequence from the slope surface to the outside at a preset height; each one-way water drain pipe penetrates through the gravel reversed filter layer, the anti-seepage geotextile and the stone-laminated concrete in sequence along the direction of declining from inside to outside, and the one-way water drain pipes are arranged in an array on the slope surface of the side slope between the preset heights from the top surface to the top of the foundation. The utility model adopts the stone concrete which has lower cost than the reinforced concrete; a one-way water drain pipe is additionally arranged to reduce seepage influence caused by difference between internal and external water levels; the permeable geotextile and the impermeable geotextile are additionally arranged, so that water in the embankment can be discharged, fine particles in the filler are not brought out, and the stability of the roadbed is ensured.
Description
Technical Field
The utility model relates to a side slope protection technical field specifically relates to an impervious protective structure of embankment side slope soaks.
Background
Along with the rapid development of the transportation industry in China, more and more embankments are built along rivers and reservoirs, and the embankments are soaked in water all the year round or seasonally, are affected by flowing water to cause embankment wetting and slope foot emptying, or are affected by water level sudden drop to take away filling materials in the embankments, so that the embankments are unstable and the slopes collapse, and therefore the soaked embankments are well protected, and the method has great significance for ensuring smooth transportation and safe driving.
In bank region water-immersed embankment side slope engineering, the problems of side slope deformation and settlement, collapse and even instability and the like caused by seepage generated by water level fluctuation are always the key problems of protection. The slope protection is carried out by adopting reinforced concrete and gabion paving in the prior art, although the mode can resist the scouring of waves, the problem of slope seepage damage cannot be solved, and the gabion protection also has the problem of poor durability.
Therefore, to the reason and the mechanism of reservoir area soaking embankment side slope destruction, the utility model discloses from the basic principle of the balanced inside and outside water pressure of control side slope, provide a reservoir area soaking embankment side slope impervious protective structure, improve the impervious performance of side slope, solve prior art's not enough and defect.
Disclosure of Invention
An object of the utility model is to provide an improve impervious protective structure of soakage embankment side slope of impervious performance of side slope.
In order to realize the purpose, the seepage-proofing protective structure for the side slope of the submerged embankment comprises a foundation, seepage geotextile, a gravel reverse filter layer, seepage-proofing geotextile, stone concrete and a one-way water drain pipe; the foundation is arranged at the bottom of the embankment, and the bottom surface of the foundation is embedded into a riverbed; the water seepage geotextile, the gravel reverse filter layer and the seepage-proofing geotextile are sequentially arranged from the top surface of the foundation to the top from the slope surface to the outside at preset heights; each one-way water drain pipe penetrates through the gravel reversed filter layer, the seepage-proof geotextile and the stone concrete in sequence along the direction of declining from inside to outside so as to drain water seeping out of the seepage-proof geotextile to the outside of the stone concrete, and the one-way water drain pipes are arranged in an array on the slope surface of the side slope between the preset heights from the top surface to the top of the foundation.
As a preferred scheme, the foundation is arranged along the slope toe in multiple sections, settlement joints are arranged between the foundations of the adjacent sections, the foundation is built by stone concrete, the settlement joints are sealed by asphalt caulking paste, and the height of the foundation is 2 m.
Preferably, the mass per unit area of the water-permeable geotextile is 300-500 g/m2The vertical permeability coefficient is more than or equal to 1 multiplied by 10-2cm/s; the impermeable geotextile adopts a two-cloth one-film type composite geomembrane, and the vertical permeability coefficient is less than or equal to 1 multiplied by 10-12cm/s。
As a preferred scheme, the preset height of the top of the water seepage geotextile, the gravel reverse filter layer and the anti-seepage geotextile is the sum of the designed water level, the choked water and the wave height plus 0.5 m.
Preferably, the one-way water drain pipes in each row are distributed on the slope surface at equal intervals in the horizontal direction between the adjacent one-way water drain pipes, the one-way water drain pipes in two adjacent rows are distributed on the slope surface at equal intervals in the vertical direction, and the one-way water drain pipes in two adjacent rows are distributed in a staggered mode in the vertical direction.
Preferably, the horizontal spacing between the adjacent one-way drain pipes is 2m, the vertical spacing between the adjacent two rows of the one-way drain pipes is 1.5m, and the one-way drain pipes are inclined from inside to outside to the lower direction by 3 degrees to 5 degrees relative to the horizontal direction.
As a preferred scheme, the water inlet section of the one-way water drain pipe is provided with water seepage holes, the end head of the one-way water drain pipe is wrapped by a 200-mesh nylon net and then bound by No. 14 galvanized wires, and the water seepage holes are uniformly distributed on the water inlet section along the circumferential direction and are staggered in the axial direction.
Preferably, 5 water seepage holes are distributed in the circumferential direction of the one-way water drain pipe, the diameter of each water seepage hole is 1.2cm, and the axial distance between the water seepage holes along the one-way water drain pipe is 5 cm.
The utility model has the advantages that: the utility model discloses an among the impervious protective structure of embankment side slope soaks: (1) the stone concrete is adopted, so that the cost is lower than that of reinforced concrete, and the durability is higher than that of a gabion; (2) the unidirectional water drain pipe is additionally arranged, when the water level fluctuates, the internal and external water pressures can be consistent along with the seepage of water flow in the slope, so that the seepage influence caused by the difference between the internal and external water pressures is reduced; (3) the permeable geotextile and the impermeable geotextile are additionally arranged, so that water in the embankment can be discharged while fine particles in the filler are not carried out when the water level of the reservoir area fluctuates, and the stability of the roadbed is ensured.
Drawings
Fig. 1 is a sectional view of the seepage-proofing structure of the side slope of the submerged embankment in the preferred embodiment of the present invention.
Fig. 2 is a layout of one-way drain pipes of the side slope anti-permeability protection structure of the submerged embankment in fig. 1.
Fig. 3 is a partial structural view of a one-way drain pipe of the submerged embankment side slope anti-permeability protection structure in fig. 1.
The components in the figures are numbered as follows: the water seepage and seepage prevention foundation comprises a foundation 1, water seepage geotextile 2, a gravel reversed filter layer 3, seepage prevention geotextile 4, stone concrete 5, a one-way water drain pipe 6 (wherein, a water seepage hole 6A, a 200-mesh nylon net 6B, No. 14 galvanized wire 6C) and an original ground line 7.
Detailed Description
The present invention will be described in further detail with reference to the following drawings and specific embodiments.
The above-mentioned problem to prior art exists, the utility model provides a reservoir area soaks impervious protective structure of embankment side slope and method effectively avoids the seepage flow destruction of wading the side slope to the construction is simple, engineering low cost.
As shown in fig. 1, the impervious protective structure of embankment side slope that soaks of the utility model discloses preferred embodiment, including basis 1, infiltration geotechnological cloth 2, gravel reversed filter 3, prevention of seepage geotechnological cloth 4, piece stone concrete 5 and one-way water-drain mast 6.
The foundation 1 is constructed by stone concrete and is arranged on a riverbed at the slope toe of a bank side slope. The top surface of the foundation 1 is as high as the top surface of the riverbed, the bottom surface of the foundation 1 is embedded into the riverbed, and the outer side of the foundation 1 is level with the original ground line 7. The foundation 1 is arranged in a plurality of sections on the riverbed of the slope toe of the bank side slope along the bank side slope toe, settlement joints are arranged between the foundations 1 of adjacent sections, and the settlement joints are sealed by asphalt caulking paste. In the illustrated embodiment, the height of the foundation 1 is about 2 m.
The seepage geotextile 2, the gravel reverse filter layer 3 and the seepage-proofing geotextile 4 are arranged in sequence from the inner side to the outer side from the top surface to the top of the foundation 1 on the slope surface of the bank slope. In the illustrated embodiment, the predetermined height H2 at the top of the permeable geotextile 2, gravel reverse filter 3 and impermeable geotextile 4 is the design water level H1 plus the stagnant water plus the wave height plus 0.5m, namely: h2 is H1+ damming + wave height +0.5 m.
The mass per unit area of the water-permeable geotextile 2 is 300-500 g/m2The tensile strength is more than or equal to 10kN/m, the elongation at break is less than 50 percent, the tear strength is more than or equal to 0.5kN, the burst strength of CBR is more than or equal to 3.5kN/m, and the vertical permeability coefficient is more than or equal to 1 multiplied by 10-2cm/s。
The impermeable geotextile 4 adopts a two-cloth one-film type, and has the specification: the mass of the fabric/the thickness of the film/the mass of the fabric is 200 g/0.5-1 mm/200g (per m)2) The tensile strength is more than or equal to 15kN/m, the elongation at break is less than 50 percent, the tear strength is more than or equal to 0.5kN, the burst strength of CBR is more than or equal to 3.5kN/m, and the vertical permeability coefficient is less than or equal to 1 multiplied by 10-12cm/s。
And the stone slab concrete 5 is poured outside the impermeable geotextile 4 from the top surface to the top of the foundation 1 to the designed height.
Referring to fig. 2, the unidirectional water drain pipes 6 are arranged in an array on the slope surface of the bank slope between the top surface of the foundation 1 and the preset height of the top. In each row of unidirectional drain pipes 6, adjacent single pipesThe water drain pipes 6 are distributed at equal intervals horizontally, and the horizontal interval between the adjacent one-way water drain pipes 6 is 2m in the illustrated embodiment. The two adjacent rows of the one-way drain pipes 6 are arranged at equal intervals, the two adjacent rows of the one-way drain pipes 6 are arranged in a vertically staggered manner, and the interval between the two adjacent rows of the one-way drain pipes 6 is 1.5m in the illustrated embodiment. The water inlet section of the one-way water drain pipe 6 is embedded in the gravel reverse filtering layer 3 and inclines 3-5 degrees from the inside to the outside to the horizontal direction, so that the function of one-way drainage from the inside of the side slope to the outside of the side slope is realized, and the function of adjusting the water pressure inside and outside the side slope is realized. The one-way water drain pipe 6 is a hard PVC pipe, the Vicat softening temperature is more than or equal to 79 ℃, the longitudinal retraction rate is less than or equal to 5%, the TIR (20 ℃) of a drop hammer impact test is less than or equal to 10%, and the circumferential rigidity is more than or equal to 4KN/m2. The one-way drain pipe 6 can be an existing one-way drain pipe, such as the drain pipe described in "a floating ball one-way drain pipe" of chinese utility model patent No. 201520377749.8 or "a cover plate one-way drain pipe" of chinese utility model patent No. 201420784797.4.
Referring to fig. 2, the part of the one-way drain pipe 6 inserted into the gravel back-filtering layer 3 is a water inlet section, and the water inlet section is provided with a water seepage hole 6A. The seepage holes 6A are uniformly distributed on the water inlet section of the unidirectional water drain pipe 6 along the circumferential direction and are staggered in the axial direction. In the illustrated embodiment, the number of the water penetration holes 6A in the circumferential direction is preferably 5, the diameter of the water penetration holes 6A is 1.2cm, and the axial distance between the water penetration holes 6A along the one-way drain pipe 6 is 5 cm.
The end of the water inlet section of the one-way drain pipe 6 is wrapped by a 200-mesh nylon net 6B and tightly bound by No. 14 galvanized wires 6C. In the illustrated embodiment, the water inlet section of the one-way water drain pipe 6 is wrapped by the 2-layer 200-mesh nylon net 6B, and the nylon net 6B is required to cover all the water seepage holes 6A. The water outlet section of the one-way drain pipe 6 penetrates through the stone concrete 5.
In the seepage-proofing protective structure for the side slope of the submerged embankment, the seepage geotextile 2, the gravel reverse filter layer 3, the seepage-proofing geotextile 4 and the one-way water drain pipe 6 are combined and combined with the flat stone concrete 5, so that the protective structure with the seepage-proofing effect is formed.
The construction method of the seepage-resistant protection structure for the side slope of the water-immersed embankment comprises the following steps:
before water storage or in a dry season, construction is carried out, the construction is divided into a plurality of construction sections along the extending direction of the protected bank slope, and construction is carried out on each construction section according to the following steps in sequence:
step a, excavating a foundation groove of a construction section at the river bottom of a bank slope toe, pouring a foundation 1 in the foundation groove, burying the bottom surface of the foundation 1 into a river bed, setting a settlement joint between the top surfaces of the foundations 1 and the river bed at the same height, and filling asphalt caulking paste into the settlement joint;
b, brushing the slope surface of the bank side slope according to design, paving water-permeable geotextile 2 on the slope surface of the bank side slope from the top surface to the top of the foundation 1 at a preset height, and overlapping the water-permeable geotextile 2 by adopting a welding mode;
step c, paving a gravel reversed filter layer 3 at a preset height from the top surface to the top of the foundation 1 on the outer side of the water-permeable geotextile 2;
d, laying impermeable geotextiles 4 at a preset height from the top surface to the top of the foundation 1 on the outer sides of the gravel reverse filter layers 3, overlapping the impermeable geotextiles 4 by adopting a welding mode, and punching holes at the superposed positions of the impermeable geotextiles 4 and the one-way water drain pipes 6 in advance;
e, pouring the stone concrete 5 by using a vertical mold, and placing the unidirectional water drain pipe 6 when the stone concrete 5 is constructed to the position of the designed unidirectional water drain pipe 6, and inclining the unidirectional water drain pipe 3-5 degrees downwards from inside to outside relative to the horizontal direction;
and f, erecting a template and pouring the stone concrete 5 to the designed height of the top.
Compared with the prior art, the utility model discloses an impervious protective structure of embankment side slope and construction method soak has following advantage:
(1) compared with the existing paving protection structure, the stone concrete has the advantages of lower manufacturing cost than reinforced concrete and higher durability than gabion protection.
(2) Compared with the existing reinforced concrete paving protection structure, the one-way water drain pipe is additionally arranged, and the effect of consistent water pressure inside and outside the slope is realized under the condition of water immersion; when the water level fluctuates, the internal and external water pressures can be consistent along with the seepage of water flow in the slope, so that the seepage influence caused by the difference between the internal and external water pressures is reduced.
(3) Compared with the existing structure gabion protective structure, the water seepage geotextile and the water seepage prevention geotextile are additionally arranged, so that water in the embankment can be discharged while fine particles in the filler are not taken out when the water level of the reservoir area fluctuates, and the stability of the roadbed is ensured.
(4) The utility model has the advantages of simple structure, economy is reasonable, the function is reliable, the construction is swift, long service life, can weaken the seepage flow destruction of side slope by a wide margin, is favorable to wading the long-term stability of side slope.
The above-mentioned embodiments only represent some embodiments of the present invention, and the description thereof is specific and detailed, but not to be construed as limiting the scope of the present invention. It should be noted that, for those skilled in the art, without departing from the spirit of the present invention, several variations and modifications can be made, which are within the scope of the present invention. Therefore, the protection scope of the present invention should be subject to the appended claims.
Claims (8)
1. The utility model provides an impervious protective structure of embankment side slope soaks which characterized in that: comprises a foundation (1), water seepage geotextile (2), a gravel reversed filter layer (3), anti-seepage geotextile (4), stone concrete (5) and a one-way water drain pipe (6); the foundation (1) is arranged at the bottom of the embankment, and the bottom surface of the foundation is embedded into a river bed; the water seepage geotextile (2), the gravel reversed filter layer (3) and the seepage-proofing geotextile (4) are sequentially arranged from the top surface of the foundation (1) to the outside from the slope surface of the side slope at a preset height from the top surface to the top; each one-way water drain pipe (6) sequentially penetrates through the gravel reverse filter layer (3), the anti-seepage geotextile (4) and the stone concrete (5) from inside to outside in a downward-inclined direction so as to drain water seeping out of the water seepage geotextile (2) to the outside of the stone concrete (5), and the one-way water drain pipes (6) are arranged in an array on a slope surface between the preset height from the top surface to the top of the foundation (1).
2. The embankment side slope anti-permeability protection structure of claim 1, wherein: foundation (1) is the multistage setting along the side slope toe, adjacent section be provided with the subsiding crack between foundation (1), foundation (1) is built by stone concrete, the subsiding crack adopts pitch class caulking paste sealed, the height of foundation (1) is 2 m.
3. The embankment side slope anti-permeability protection structure of claim 1, wherein: the mass per unit area of the water-permeable geotextile (2) is 300-500 g/m2The vertical permeability coefficient is more than or equal to 1 multiplied by 10-2cm/s; the impermeable geotextile (4) adopts a two-cloth one-film type composite geomembrane, and the vertical permeability coefficient is less than or equal to 1 multiplied by 10-12cm/s。
4. The embankment side slope anti-permeability protection structure of claim 1, wherein: infiltration geotechnological cloth (2) gravel reversed filter layer (3) reaches the top of prevention of seepage geotechnological cloth (4) is predetermine highly to add 0.5m for design water level, choked water, wave height sum.
5. The embankment side slope anti-permeability protection structure of claim 1, wherein: the one-way water drain pipes (6) in each row are horizontally distributed on the slope surface at equal intervals between the adjacent one-way water drain pipes (6), the two adjacent rows of the one-way water drain pipes (6) are vertically arranged at equal intervals on the slope surface, and the two adjacent rows of the one-way water drain pipes (6) are vertically staggered.
6. The embankment side slope anti-permeability protection structure of claim 4, wherein: the horizontal distance between the adjacent one-way drain pipes (6) is 2m, the vertical distance between the adjacent two rows of the one-way drain pipes (6) is 1.5m, and the one-way drain pipes (6) are inclined by 3-5 degrees from the horizontal direction from inside to outside.
7. The embankment side slope anti-permeability protection structure of claim 1, wherein: the water inlet section of the one-way water drain pipe (6) is provided with water seepage holes (6A), the end of the water seepage holes is wrapped by a 200-mesh nylon net (6B) and then bound by No. 14 zinc-plated wires (6C), and the water seepage holes (6A) are uniformly distributed along the circumferential direction and are staggered in the axial direction on the water inlet section.
8. The embankment side slope anti-permeability protection structure of claim 7, wherein: the one-way water drain pipe (6) upwards distribute 5 infiltration hole (6A) in circumference, the diameter in infiltration hole (6A) is 1.2cm, infiltration hole (6A) are followed the axial interval of one-way water drain pipe (6) is 5 cm.
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| CN201920414856.1U CN209873823U (en) | 2019-03-28 | 2019-03-28 | Impervious protective structure of embankment side slope soaks |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109868830A (en) * | 2019-03-28 | 2019-06-11 | 中交第二公路勘察设计研究院有限公司 | The impervious safeguard structure of immerseable embankment side slope and construction method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109868830A (en) * | 2019-03-28 | 2019-06-11 | 中交第二公路勘察设计研究院有限公司 | The impervious safeguard structure of immerseable embankment side slope and construction method |
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