CN217378953U - Seasonal frozen soil area slope drainage system - Google Patents
Seasonal frozen soil area slope drainage system Download PDFInfo
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- CN217378953U CN217378953U CN202221258889.XU CN202221258889U CN217378953U CN 217378953 U CN217378953 U CN 217378953U CN 202221258889 U CN202221258889 U CN 202221258889U CN 217378953 U CN217378953 U CN 217378953U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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Abstract
The utility model discloses a drainage system for a side slope in a seasonal frozen soil area, which comprises a drainage blind ditch and a slope drainage structure; the drainage intercepting blind ditch is positioned at the top end of the side slope and comprises a first side wall, a bottom edge and a second side wall which are sequentially connected, the first side wall is close to the side slope, the second side wall is provided with a latticed soil retaining net, and the lower end of the soil retaining net is positioned in a non-frozen soil layer; the slope drainage structure is arranged on the side slope at intervals along the lateral direction of the side slope, the slope drainage structure comprises a vertical drainage ditch and a plurality of drainage floral tubes, through holes are formed in the drainage floral tubes, and the drainage floral tubes are arranged in the frozen soil layer of the side slope along the vertical drainage ditch in a row. The utility model provides a drainage system can effectively discharge the freeze thawing water of seasonality frozen soil, can eliminate the frozen soil's frozen swelling power again, and the effect is showing, and drainage system has the construction simple and efficient simultaneously, and the cost is lower etc. has a little.
Description
Technical Field
The utility model relates to a side slope protection technical field, in particular to seasonal frozen soil district side slope drainage system.
Background
With the development of economy, a plurality of highway lines are planned and constructed in cold, plateau and frozen soil areas such as northeast, northwest and southwest of China. The seasonal frozen soil is a special soil-water system containing ice crystals, a seasonal active layer which is frozen in winter and melted in summer exists, the water content of a frozen soil layer of the seasonal frozen soil is large, an ice gathering effect can occur in the freezing process, the volume of a soil body can be expanded, frost heaving force is generated, the roadbed and the roadbed slope are deformed to cause frost heaving damage, and the roadbed slope are eroded when the seasonal frozen soil area frequently falls water.
At present, a method of combining a drainage ditch and a blind ditch is adopted for draining water of a roadbed side slope in a seasonal frozen soil region, wherein the drainage ditch is arranged at the bottom of the side slope and is used for draining water in the seasonal frozen soil region on the side slope after freezing and thawing; the blind ditches are arranged on two sides of the top of a roadbed side slope, the direction of the blind ditches is the same as that of a highway line, water in a seasonal frozen soil area above the top of the side slope is subjected to freeze thawing and drainage, at present, the blind ditches adopt bottom edges and side walls, coarse grain materials such as crushed gravel and the like are filled in the blind ditches, drainage and water interception blind ditches are paved with inverted filter layers, for example, patents such as a reverse embedded blind ditch drainage and seepage system (CN201520439472.7) of a tailing dam and a rapid drainage type plastic blind ditch (CN202120486305.3) and the like, and the side slope interception and drainage blind ditches are mostly manufactured by intercepting surface flowing water. In the prior art, the bottom edge and the side wall are made of concrete structures, water formed after seasonal frozen soil is melted in spring cannot be intercepted, the water easily permeates into the soil body of the side slope to influence the safety of the side slope, and meanwhile, frost heaving force is generated on the side wall of the blind ditch when the frozen soil is formed in winter to influence the stability and the service life of the side wall. In the prior art, a drainage ditch is arranged at the bottom of the side slope, the drainage ditch can be formed only by reserving the bottom of the side slope after freezing and thawing of water in a seasonal frozen soil region in a side slope body, and the side slope cannot be eroded due to timely drainage of the water. In view of the above, the frost heaviness of the seasonal frozen soil area cannot be reasonably solved by the conventional slope drainage method.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to solve the not good problem of side slope drainage effect among the prior art, provide a seasonal frozen soil district side slope drainage system.
In order to realize the purpose of the utility model, the utility model provides a following technical scheme:
a drainage system for a side slope in a seasonal frozen soil area comprises a drainage intercepting blind ditch and a slope drainage structure;
the drainage intercepting blind ditch is positioned at the top end of the side slope and comprises a first side wall, a bottom edge and a second side wall which are sequentially connected, the first side wall is close to the side slope, the second side wall is provided with a latticed soil retaining net, and the lower end of the soil retaining net is positioned in a non-frozen soil layer;
the slope drainage structure is arranged on the side slope at intervals along the side slope in the transverse direction, and comprises vertical drainage ditches and a plurality of drainage floral tubes, through holes are formed in the drainage floral tubes, and the drainage floral tubes are arranged in the frozen soil layer of the side slope along the vertical drainage ditches in a row.
The technical scheme of the utility model is that a drainage blind ditch is arranged at the top end of the side slope and used for discharging frozen water in the seasonal frozen soil area above the top of the side slope, a slope drainage structure is arranged on the side slope and used for discharging frozen water in the seasonal frozen soil area of the side slope, a first side wall of the drainage blind ditch is close to and close to the side slope, a second side wall is close to the seasonal frozen soil area above the top of the side slope, a retaining net with the lower end located in a non-frozen soil layer is arranged on the second side wall, and a hole is arranged on the retaining net; when the frozen soil in the seasonal frozen soil area above the top of the side slope melts, shallow groundwater is formed, water enters the drainage blind ditch through the hole holes in the soil retaining net, and then is collected on the surface of the component 1 to flow away; when the frozen soil in the slope body melts, shallow groundwater is formed, water enters the drainage floral tube from the through hole on the drainage floral tube and then enters the drainage floral tube to be drained to the vertical drainage ditch. In winter, rainwater and snow water enter the seasonal frozen soil area to form frozen soil, the frozen soil forms frozen expansion force on the retaining net, and the retaining net has flexibility, can eliminate the frozen expansion force and prevents the influence of the frozen expansion force on the structural stability of the side wall of the blind ditch.
Further, the cross section of the drainage blind ditch is in a shape of an inverted trapezoid with a large top and a small bottom, the first side wall is close to and close to the side slope, and the second side wall is close to the seasonal frozen soil area above the top of the side slope.
Furthermore, the second side wall comprises a third side wall and a fourth side wall, the third side wall is the soil blocking net, the fourth side wall is connected with the bottom edge, and the bottom edge, the first side wall and the fourth side wall are of a concrete structure.
Furthermore, the depth of the lower end of the soil retaining net extending into the non-frozen soil layer is 20-30 cm.
Furthermore, the soil blocking net is made of galvanized iron wires, and the space between grids is 4-10 mm.
Further, the water intercepting and draining blind ditch is filled with stones or pebbles. When frozen soil is formed in the seasonal frozen soil area, the soil retaining net transmits the frost heaving force to the block stone or pebble filling layer in the water intercepting and draining blind ditch, and the frost heaving force is compressed and digested through gaps among the block stone or the pebbles.
Furthermore, the slope surface drainage structure is transversely arranged along the side slope at an interval distance of 1.5-3 m.
Further, the interval distance of the drainage flower pipes arranged in a row along the vertical drainage ditch is 1-2.5 m.
Furthermore, the lower end of the drainage perforated pipe extends into the non-frozen soil layer for a distance of 10-40 cm.
Furthermore, a through hole is formed in one half of the pipe wall of the drainage flower pipe, the through hole is located in the upper end of the drainage flower pipe on the side slope, the through hole is not formed in the lower end of the drainage flower pipe at the moment, water enters the drainage flower pipe through the through hole and then is discharged into the vertical drainage ditch through the drainage flower pipe, and the water is prevented from entering the side slope again.
Furthermore, the diameter of a through hole in each drainage perforated pipe is 6-10 mm, and the distance between every two rows of drainage perforated pipes is 10-15 cm.
Furthermore, the angle formed by the drainage perforated pipe and the horizontal plane is 5-15 degrees.
Further, the side slope is provided with the bottom drainage ditch, is located the side slope bottom, every vertical drainage ditch with the bottom drainage ditch intercommunication, from the drainage intraductal discharged water warp vertical drainage ditch finally arranges extremely in the bottom drainage ditch.
Compared with the prior art, the beneficial effects of the utility model are that:
the utility model discloses a drainage system make full use of cut drainage french drain and domatic drainage structures's effective combination, cut drainage french drain be used for discharging the freezing water that melts in seasonal frozen soil district more than the side slope top, domatic drainage structures is used for discharging the freezing and thawing water in side slope body seasonal frozen soil district, when seasonal frozen soil district forms the frozen soil, the fender net passes the frozen expansive force to the piece stone or the cobble filling layer in cutting drainage french drain, and through the space compression digestion frozen expansive force between piece stone or cobble, prevent the influence of frozen expansive force to french drain side wall structural stability, the utility model provides a drainage system can effectively discharge the freezing and thawing water of seasonal frozen soil, can eliminate the frozen expansive force of frozen soil again, and the effect is showing, and drainage system has the simple and fast, cost lower etc. has the point simultaneously.
Drawings
FIG. 1 is a sectional view of a drainage system for seasonally frozen soil slopes according to example 1;
FIG. 2 is a schematic view showing a structure of a retaining net in the drainage system for a side slope according to example 1;
FIG. 3 is a top view of the slope drainage structure of embodiment 1;
FIG. 4 is a sectional view of a water discharge floral tube in the drainage system for a side slope according to example 1;
FIG. 5 is a schematic diagram of a drainage pipe in the drainage system for a side slope according to example 1;
FIG. 6 is a top view of the slope drainage structure of embodiment 2;
the labels in the figure are: 1-frozen soil layer, 2-non-frozen soil layer, 3-cut drainage blind ditch, 31-first side wall, 32-bottom edge, 33-retaining net, 34-fourth side wall, 4-slope, 5-drainage flower pipe, 51-through hole, 6-vertical drainage ditch and 7-bottom drainage ditch.
Detailed Description
The present invention will be described in further detail with reference to test examples and specific embodiments. However, it should not be understood that the scope of the above subject matter is limited to the following embodiments, and all the technologies realized based on the content of the present invention are within the scope of the present invention.
Example 1
The drainage system of the seasonally frozen soil side slope 4 as shown in figure 1 comprises a drainage intercepting blind ditch 3 and a slope surface drainage structure; the water stopping and draining blind ditch 3 is positioned at the top end of the side slope 4, the water stopping and draining blind ditch 3 comprises a first side wall 31, a bottom edge 32 and a second side wall which are sequentially connected, the first side wall 31 is close to the side slope 4, the second side wall is provided with a latticed soil retaining net 33, and the lower end of the soil retaining net 33 is positioned on the non-frozen soil layer 2; slope surface drainage structures are arranged on the side slope 4 along the side slope 4 at intervals, each slope surface drainage structure comprises a vertical drainage ditch 6 and a plurality of drainage floral tubes 5, through holes 51 are formed in the drainage floral tubes 5, and the drainage floral tubes 5 are arranged in the frozen soil layer of the side slope 4 along the vertical drainage ditches 6 in a row.
The depth of the frozen soil layer 1 in the seasonal frozen soil area is generally 0.6-1.6m, a small amount of 2.0-2.4m and the deepest depth of 2.4m in the country. The side slope 4 is provided with the bottom escape canal 7, is located the side slope 4 bottom, and the section of intercepting drainage french drain 3 is big-end-up, as shown in fig. 1, and first side wall 31 is close to and is close to side slope 4, and the second side wall is close to the seasonality frozen soil district more than the side slope 4 top.
In some embodiments, the blind cut-off drain ditch 3 is filled with stones or pebbles, the second side wall includes a third side wall and a fourth side wall 34, the third side wall is a retaining net 33, the fourth side wall 34 is connected with the bottom edge 32, and the bottom edge 32, the first side wall 31 and the fourth side wall 34 are of a concrete structure. The distance that the lower end of the retaining net 33 extends into the non-frozen soil layer 2 is 20-30 cm. Further, the retaining net 33 is made of galvanized iron wires, and the space between the grids is 5mm, as shown in fig. 2.
The slope drainage structure is transversely arranged along the side slope 4 at an interval distance of 1.5-3m, the side slope 4 transversely refers to the slope surface width direction of the side slope 4, the vertical drainage ditch 6 is perpendicular to the bottom drainage ditch 7 of the side slope 4, and all the drainage floral tubes 5 are arranged in a # -shape, as shown in fig. 3. The interval distance of the drainage floral tubes 5 arranged in a row along the vertical drainage ditch 6 is 1-2.5m, and the distance that the lower ends of the drainage floral tubes 5 extend into the non-frozen soil layer 2 is 10-40 cm. As shown in FIG. 4, a through hole 51 is formed in a half of the wall of the drainage pipe 5, when the drainage pipe 5 is constructed, the through hole 51 is located at the upper end, the diameter of the through hole 51 on the drainage pipe 5 is 6-10 mm, and as shown in the actual figure of FIG. 5, the distance between each row of the drainage pipes 5 is 10-15 cm. The angle formed by the drainage perforated pipe 5 and the horizontal plane is 5-15 degrees. On the side slope 4, the through hole 51 is positioned at the upper end of the drainage floral tube 5, at this time, the through hole 51 is not arranged at the lower end of the drainage floral tube 5, water enters the drainage floral tube 5 through the through hole 51 and then is discharged into the vertical drainage ditch 6 through the drainage floral tube 5, and the water is prevented from entering the side slope 4 again.
In spring, the frozen soil in the seasonal frozen soil area above the top of the side slope 4 melts to form shallow underground water, water enters the water intercepting and draining blind ditch 3 through the hole holes in the soil retaining net 33, and then the water is collected on the surface of the component 1 to flow away; when the frozen soil in the slope body of the side slope 4 melts, shallow groundwater is formed, water enters the drainage floral tube 5 from the through hole 51 on the drainage floral tube 5, then enters the drainage floral tube 5 to be discharged to the vertical drainage ditch 6, and finally is discharged to the bottom drainage ditch 7. In winter, rainwater and snow water enter the seasonal frozen soil area to form frozen soil, the frozen soil forms a frozen expansion force on the retaining net 33, the retaining net 33 has flexibility, the retaining net 33 transmits the frozen expansion force to the block stones or the pebble filling layers in the drainage blind ditch 3, and the frozen expansion force is compressed and digested through gaps among the block stones or the pebbles, so that the influence of the frozen expansion force on the structural stability of the blind ditch side wall is prevented.
Example 2
This embodiment is similar to embodiment 1, and is different in that the vertical drainage ditch 6 of the slope drainage structure is not perpendicular to the bottom drainage ditch 7 of the side slope 4, and all the drainage floral tubes 5 are arranged in a plum-shape, as shown in fig. 6.
The above description is only exemplary of the present invention and should not be taken as limiting the scope of the present invention, as any modifications, equivalents, improvements and the like made within the spirit and principles of the present invention are intended to be included within the scope of the present invention.
Claims (10)
1. A drainage system for a side slope in a seasonal frozen soil area is characterized by comprising a water interception and drainage blind ditch (3) and a slope drainage structure;
the drainage cut-off blind ditch (3) is positioned at the top end of a side slope (4), the drainage cut-off blind ditch (3) comprises a first side wall (31), a bottom edge (32) and a second side wall which are sequentially connected, the first side wall (31) is close to the side slope (4), the second side wall is provided with a latticed soil retaining net (33), and the lower end of the soil retaining net (33) is positioned on a non-frozen soil layer (2);
domatic drainage structures sets up on side slope (4) along side slope (4) horizontal interval, domatic drainage structures includes vertical escape canal (6) and a plurality of drainage floral tubes (5), be provided with through-hole (51) on drainage floral tube (5), drainage floral tube (5) become to be listed as along vertical escape canal (6) and arrange in the frozen soil layer of side slope (4).
2. The seasonal permafrost region slope drainage system according to claim 1, characterized in that the second side wall comprises a third side wall and a fourth side wall (34), the third side wall is the retaining net (33), and the fourth side wall (34) is connected with the bottom edge (32).
3. The seasonal frozen soil zone slope drainage system of claim 2, wherein the bottom edge (32), the first side wall (31) and the fourth side wall (34) are of a concrete structure.
4. The seasonal permafrost region slope drainage system according to claim 1, wherein the lower end of the soil retaining net (33) extends into the non-frozen soil layer (2) to a depth of 20-30 cm.
5. The system for slope drainage in seasonal frozen soil zone according to claim 1, wherein the intercepting drainage blind ditches (3) are filled with stones or pebbles.
6. The system of claim 1, wherein the sloping surface drainage structures are arranged laterally along the slope (4) at a distance of 1.5-3 m.
7. The seasonal permafrost region slope drainage system according to claim 6, wherein the drainage floral tubes (5) are arranged in a row along the vertical drainage ditch (6) at a spacing distance of 1-2.5 m.
8. The seasonal permafrost region slope drainage system according to claim 1, characterized in that the angle of the drainage floral tube (5) to the horizontal plane is 5-15 degrees.
9. The slope drainage system for the seasonal frozen soil area according to claim 1, wherein a through hole (51) is formed in one half of the wall of the drainage floral tube (5), the diameter of the through hole (51) in the drainage floral tube (5) is 6-10 mm, and the distance between every two rows of the drainage floral tubes is 10-15 cm.
10. Seasonal permafrost region slope drainage system according to any of claims 1-9, characterized in that the slope (4) is provided with a bottom drain (7) at the bottom of the slope (4).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221258889.XU CN217378953U (en) | 2022-05-24 | 2022-05-24 | Seasonal frozen soil area slope drainage system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221258889.XU CN217378953U (en) | 2022-05-24 | 2022-05-24 | Seasonal frozen soil area slope drainage system |
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| Publication Number | Publication Date |
|---|---|
| CN217378953U true CN217378953U (en) | 2022-09-06 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202221258889.XU Active CN217378953U (en) | 2022-05-24 | 2022-05-24 | Seasonal frozen soil area slope drainage system |
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| CN (1) | CN217378953U (en) |
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2022
- 2022-05-24 CN CN202221258889.XU patent/CN217378953U/en active Active
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