CN109853590B - Device for infiltrating foreign soil base layer on rock steep slope surface by utilizing rainfall and construction method - Google Patents

Device for infiltrating foreign soil base layer on rock steep slope surface by utilizing rainfall and construction method Download PDF

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CN109853590B
CN109853590B CN201910061237.3A CN201910061237A CN109853590B CN 109853590 B CN109853590 B CN 109853590B CN 201910061237 A CN201910061237 A CN 201910061237A CN 109853590 B CN109853590 B CN 109853590B
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pvc
slope
pipe
rock
drainage
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CN109853590A (en
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桂跃
刘声钧
赵振兴
张秋敏
方超
刘锐
吴承坤
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Kunming University of Science and Technology
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Kunming University of Science and Technology
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    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02ATECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
    • Y02A10/00TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE at coastal zones; at river basins
    • Y02A10/23Dune restoration or creation; Cliff stabilisation
    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02ATECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
    • Y02A30/00Adapting or protecting infrastructure or their operation
    • Y02A30/60Planning or developing urban green infrastructure

Abstract

The invention discloses a device for infiltrating a foreign soil base layer on a rocky steep slope surface by utilizing rainfall and a construction method, and belongs to the technical field of mine ecological restoration. The device comprises an intercepting ditch, PVC pipes, drainage ditches and permeable stone gaskets, wherein the intercepting ditch is formed at the top of a rocky abrupt slope, a drainage through hole is formed in the side wall of the bottom of the intercepting ditch and extends towards the rocky abrupt slope, a drainage ditch is formed at the toe of the rocky abrupt slope, the PVC pipes are fixedly arranged on the rocky abrupt slope, the arrangement direction of the PVC pipes is consistent with the inclination direction of the rocky abrupt slope, the water outlets of the drainage through holes are communicated with the water inlets at the top ends of the PVC pipes through PVC connecting pipes, the bottom ends of the PVC pipes extend into the drainage ditches, the permeable stone gaskets are arranged in the PVC pipes at intervals of 2-3 m, the side walls of the PVC pipes are uniformly provided with water flow through holes, a passenger soil layer is paved on the rocky abrupt slope, and the PVC pipes are uniformly buried in the middle of. The invention can solve the problems of drought caused by easy water seepage and evaporation of the foreign soil base layer on the rocky steep slope and low survival rate of vegetation on the foreign soil base layer.

Description

Device for infiltrating foreign soil base layer on rock steep slope surface by utilizing rainfall and construction method
Technical Field
The invention relates to a device for infiltrating a foreign soil base layer on a rock steep slope surface by utilizing rainfall and a construction method, and belongs to the technical field of mine ecological restoration.
Background
With the rapid development of economy, the progress of people in the aspects of roads, traffic, buildings and the like is increased day by day, and the exploitation of various stones and mines is increased more and more. However, with the mountain-opening and road-repairing and deep mining, more and more exposed rock slopes become a problem to be solved. The rocky side slope is not beautiful and is easy to weather, so that stones can slide down and even the whole side slope is unstable. Therefore, the novel foreign soil spraying technology can be produced at the same time.
In the further process of implementing the alien soil spray-seeding technology, particularly the construction of carrying out alien soil spray-seeding on a rocky slope has a particularly outstanding problem. After construction is completed, plants grow stably and quickly in the initial stage, but because the rocky slope does not have water retention property, it is difficult to ensure that sufficient water is kept in the soil dressing layer at any time for the growth of the plants, especially when the plants encounter continuous drought with high solar irradiation intensity. The water in the soil dressing layer can evaporate quickly, the rock wall in contact with the soil dressing layer can not supplement water to the soil layer in time, and the plants in the soil dressing layer can wither and die quickly. This results in failure of the entire spray, resulting in irreparable losses.
Disclosure of Invention
Aiming at the problem that the water content of the alien soil cannot be ensured after the alien soil is sprayed on the steep rock slope in the prior art, the invention provides the device for infiltrating the alien soil base layer on the steep rock slope surface by utilizing rainfall and the construction method.
The utility model provides an utilize rainfall infiltration rock matter abrupt slope surface soil dressing basic unit's device, including intercepting ditch 1, PVC pipe 3, escape canal 5, permeable stone gasket 9, intercepting ditch 1 is seted up to the top of slope 10 of rock matter abrupt slope, intercepting ditch 1's bottom lateral wall is seted up drainage through-hole and is extended to rock matter abrupt slope domatic, escape canal 5 is seted up to rock matter abrupt slope's slope toe 11, the fixed arrangement direction that sets up PVC pipe 3 and PVC pipe 3 on the rock matter abrupt slope is unanimous with the sloping direction of rock matter abrupt slope domatic, PVC pipe and the water inlet intercommunication on 3 tops of PVC pipe are passed through to drainage through-hole's delivery port, PVC pipe 3's bottom extends to in the escape canal 5, PVC pipe 3 is interior every 2~ m sets up permeable stone gasket 9, PVC pipe 3's lateral wall evenly buries the rivers through-hole underground, rock matter abrupt slope surface is domatic lays guest soil layer 2 and PVC pipe 3 evenly buries in guest soil layer.
The vertical distance between the PVC pipes 3 and the rock steep slope surface is 10-15 cm, and the horizontal distance between every two adjacent PVC pipes 3 is 1-2 m;
the PVC pipe 3 is fixedly arranged on the rock steep slope surface through an anchor 4;
geotextiles 6 are filled in the PVC pipes 3 and the PVC connecting pipes;
the insides of the PVC pipe 3 and the PVC connecting pipe are filled with sponges 7;
further, the sponge 7 is cylindrical columnar sponge, and humus soil is filled in a hollow cylinder of the cylindrical columnar sponge;
furthermore, pebbles are uniformly paved in the drainage ditch;
the inner diameter of the drainage through hole is the same as that of the PVC pipe 3 and the PVC connecting pipe, and the PVC connecting pipe is fixedly connected with the top end of the PVC pipe 3;
the inside diameter of the pipe of PVC pipe is 200~250 mm, and the pipe wall is 3~ 4mm thick, and pipe wall rivers through-hole diameter is 5~ 8mm, and the interval of the vertical water circulation hole that goes up of PVC pipe is 30~35 mm.
A construction method for infiltrating a foreign soil base layer on a rock steep slope surface by utilizing rainfall comprises the following specific steps:
(1) processing a PVC pipeline according to the gradient and height of the steep slope surface of the rock quality, and adjusting the PVC pipe according to the uneven gradient of the slope surface to ensure that the PVC pipe is consistent with the slope surface gradient; uniformly arranging water flow through holes on the side wall of the PVC pipeline, and arranging permeable stone gaskets in the PVC pipeline every 2-3 m;
(2) excavating a water intercepting ditch at the slope top of the rock steep slope, wherein drainage through holes are uniformly formed in the side wall of the bottom of the water intercepting ditch and extend to the slope surface of the rock steep slope;
(3) excavating a drainage ditch at the slope toe of the rock steep slope;
(4) uniformly arranging anchor bolts on the rocky steep slope surface, uniformly fixing PVC pipes on the rocky steep slope surface through the anchor bolts, wherein the arrangement direction of the PVC pipes is consistent with the inclination direction of the rocky steep slope surface, and ensuring that the bottom ends of the PVC pipes extend into drainage ditches;
(5) the PVC pipe is communicated with the drainage through hole on the side wall of the bottom of the intercepting drain through a PVC connecting pipe;
(6) and spraying a foreign soil layer on the steep rocky slope.
Geotextile, sponge or cylindrical sponge-humus soil is filled in the PVC pipeline in the step (1), and pebbles are laid in the drainage ditch in the step (3).
The permeable stone gasket can protect the water in the pipe and reduce the water loss;
pebbles are paved in the drainage ditch to slow down the flow velocity of water and better ensure the water storage function in the PVC pipe;
the length of the PVC pipe and whether the pipe body is bent or not need to be designed according to the slope condition, and the PVC pipe can be properly bent along the convex condition of the slope at the slope where the larger bulge cannot be leveled, so that the PVC water-retaining pipe can better fit the slope;
the vertical distance between the PVC pipe and the slope surface can be selected according to the thickness of the alien soil spray seeding to be carried out, and after the alien soil spray seeding is ensured, the PVC pipe body is positioned in the middle of the thickness of the alien soil layer, so that the alien soil wraps the PVC water-retaining pipe, and the water in the PVC pipe can be more effectively conveyed to the whole alien soil layer under the drought or excessive sunshine condition.
The invention has the beneficial effects that:
(1) the invention effectively utilizes rainwater, leads the rainwater into the PVC pipe with water retention effect through the intercepting ditch, so that sufficient water is retained in the PVC pipe, and effectively solves the problems of drought caused by water seepage and evaporation of the soil dressing base layer on the rocky steep slope and low survival rate of vegetation on the soil dressing base layer through the release of the water in the water retention pipe under the conditions of continuous sunshine and drought;
(2) the water in the water-retaining PVC pipe comes from rainwater in the intercepting ditch, manual water replenishing is not needed, the cost is low, and the efficiency is high;
(3) according to the invention, by processing the PVC pipe and a special construction process, withering of plants in a vegetation layer due to water shortage can be effectively prevented, and the growth and maintenance of the plants after the external soil spray seeding are facilitated;
(4) the construction method is convenient and fast, and the cost is low.
Drawings
FIG. 1 is a cross-sectional view of the construction of the device for infiltrating a foreign soil base layer on a rocky steep slope in embodiment 1 by rainfall;
FIG. 2 is a front view of the construction of the device for infiltrating the foreign soil base layer on the rock steep slope surface by rainfall in the embodiment 1;
FIG. 3 is a schematic structural view of the assembly of the PVC pipe and the geotextile of example 1;
FIG. 4 is a top view of the assembly of the PVC pipe with geotextile of example 1;
FIG. 5 is a schematic structural view of the assembly of the PVC pipe with cylindrical sponge-humus soil of example 2;
FIG. 6 is a top view of the PVC pipe of example 2 assembled with cylindrical sponge-humus soil;
FIG. 7 is a schematic view showing the structure of the assembly of the PVC pipe and the sponge according to example 3;
fig. 8 is a top view of the PVC pipe and geotextile sponge of example 3.
Detailed Description
The present invention will be described in further detail with reference to specific embodiments, but the scope of the present invention is not limited to the description.
Example 1: as shown in fig. 1 to 4, a device for infiltrating foreign soil base layers on rock steep slope surfaces by rainfall comprises an intercepting ditch 1, a PVC pipe 3, a drainage ditch 5 and a permeable stone gasket 9, wherein the intercepting ditch 1 is arranged on the top 10 of the rock steep slope, a drainage through hole is formed in the side wall of the bottom of the intercepting ditch 1 and extends towards the rock steep slope surfaces, a drainage ditch 5 is formed on the toe 11 of the rock steep slope, the PVC pipe 3 is fixedly arranged on the rock steep slope surfaces, the arrangement direction of the PVC pipe 3 is consistent with the inclination direction of the rock steep slope surfaces, the water outlet of the drainage through hole is communicated with the water inlet at the top end of the PVC pipe 3 through a PVC connecting pipe, the bottom end of the PVC pipe 3 extends into the drainage ditch 5, the permeable stone gaskets 9 are arranged every 2m in the PVC pipe 3, water flow through holes are uniformly formed in the side wall of the PVC pipe 3, a guest soil layer 2 is laid on the rock steep slope surfaces, and the PVC pipe 3 is uniformly buried in the middle of;
the vertical distance between the PVC pipes 3 and the rock steep slope surface is 10cm, and the horizontal distance between every two adjacent PVC pipes 3 is 1 m;
the PVC pipe 3 is fixedly arranged on the rock steep slope surface through an anchor 4;
geotextiles 6 are filled in the PVC pipes 3 and the PVC connecting pipes;
pebbles are uniformly paved in the drainage ditch;
the inner diameter of the drainage through hole is the same as that of the PVC pipe 3 and the PVC connecting pipe, and the PVC connecting pipe is fixedly connected with the top end of the PVC pipe 3; the inner diameter of the PVC pipe is 200mm, the wall thickness of the PVC pipe is 3 mm, the diameter of the water flow through holes on the pipe wall is 5mm, and the distance between the water flow through holes in the PVC pipe in the longitudinal direction is 30 mm;
a construction method for infiltrating a foreign soil base layer on a rock steep slope surface by utilizing rainfall comprises the following specific steps:
(1) processing a PVC pipeline according to the gradient and height of the steep slope surface of the rock quality, and adjusting the PVC pipe according to the uneven gradient of the slope surface to ensure that the PVC pipe is consistent with the slope surface gradient; the side wall of the PVC pipeline is uniformly provided with water flow through holes, geotechnical cloth is filled in the PVC pipeline, and permeable stone gaskets are arranged in the PVC pipeline every 2m and can protect water in the pipeline and reduce water loss;
(2) excavating a water intercepting ditch at the slope top of the rock steep slope, wherein drainage through holes are uniformly formed in the side wall of the bottom of the water intercepting ditch and extend to the slope surface of the rock steep slope;
(3) a drainage ditch is dug at the slope toe of the steep rock slope, pebbles are paved in the drainage ditch, the flow velocity of water can be slowed down, the water storage function in the PVC pipe is better ensured,
(4) uniformly arranging anchor bolts on the rocky steep slope surface, uniformly fixing PVC pipes on the rocky steep slope surface through the anchor bolts, wherein the arrangement direction of the PVC pipes is consistent with the inclination direction of the rocky steep slope surface, and ensuring that the bottom ends of the PVC pipes extend into drainage ditches;
(5) the PVC pipe is communicated with the drainage through hole on the side wall of the bottom of the intercepting drain through a PVC connecting pipe;
(6) spraying a foreign soil layer on the rocky abrupt slope surface;
the length of the PVC pipe and whether the pipe body is bent or not need to be designed according to the slope condition, and the PVC pipe can be properly bent along the convex condition of the slope at the slope where the larger bulge cannot be leveled, so that the PVC water-retaining pipe can better fit the slope;
the vertical distance between the PVC pipe and the slope surface can be selected according to the thickness of the alien soil spray seeding to be carried out, and after the alien soil spray seeding is ensured, the PVC pipe body is positioned in the middle of the thickness of the alien soil layer, so that the alien soil wraps the PVC water-retaining pipe, and the water in the PVC pipe can be more effectively conveyed to the whole alien soil layer under the drought or excessive sunshine condition.
Example 2: as shown in figures 1-2 and 5-6, a device for infiltrating a foreign soil base layer on a rocky steep slope by rainfall comprises a catch basin 1, a PVC pipe 3, the drainage ditch is characterized by comprising a drainage ditch 5 and permeable stone gaskets 9, wherein a slope top 10 of a rocky steep slope is provided with a cut-off ditch 1, the side wall of the bottom of the cut-off ditch 1 is provided with a drainage through hole, the drainage through hole extends towards the rocky steep slope, a slope toe 11 of the rocky steep slope is provided with the drainage ditch 5, a PVC pipe 3 is fixedly arranged on the rocky steep slope, the arrangement direction of the PVC pipe 3 is consistent with the inclination direction of the rocky steep slope, the water outlet of the drainage through hole is communicated with the water inlet at the top end of the PVC pipe 3 through a PVC connecting pipe, the bottom end of the PVC pipe 3 extends into the drainage ditch 5, the PVC pipe 3 is internally provided with the permeable stone gaskets 9 every 3m, the side wall of the PVC pipe 3 is uniformly provided with water flow through holes, a guest soil layer 2 is paved on the;
the vertical distance between the PVC pipes 3 and the rock steep slope surface is 15cm, and the horizontal distance between every two adjacent PVC pipes 3 is 2 m;
the PVC pipe 3 is fixedly arranged on the rock steep slope surface through an anchor 4;
the insides of the PVC pipe 3 and the PVC connecting pipe are filled with sponge 7; the sponge 7 is cylindrical sponge, and humus soil is filled in a hollow cylinder of the cylindrical sponge;
pebbles are uniformly paved in the drainage ditch;
the inner diameter of the drainage through hole is the same as that of the PVC pipe 3 and the PVC connecting pipe, and the PVC connecting pipe is fixedly connected with the top end of the PVC pipe 3; the inner diameter of the PVC pipe is 250mm, the wall thickness of the PVC pipe is 4mm, the diameter of the water flow through holes on the pipe wall is 8mm, and the distance between the water flow through holes in the PVC pipe in the longitudinal direction is 35 mm;
a construction method for infiltrating a foreign soil base layer on a rock steep slope surface by utilizing rainfall comprises the following specific steps:
(1) processing a PVC pipeline according to the gradient and height of the steep slope surface of the rock quality, and adjusting the PVC pipe according to the uneven gradient of the slope surface to ensure that the PVC pipe is consistent with the slope surface gradient; the side wall of the PVC pipeline is uniformly provided with water flow through holes, cylindrical columnar sponge-humus soil is filled in the PVC pipeline, and permeable stone gaskets are arranged in the PVC pipeline every 3m and can protect water in the pipeline and reduce water loss;
(2) excavating a water intercepting ditch at the slope top of the rock steep slope, wherein drainage through holes are uniformly formed in the side wall of the bottom of the water intercepting ditch and extend to the slope surface of the rock steep slope;
(3) a drainage ditch is dug at the slope toe of the steep rock slope, pebbles are paved in the drainage ditch, the flow velocity of water can be slowed down, the water storage function in the PVC pipe is better ensured,
(4) uniformly arranging anchor bolts on the rocky steep slope surface, uniformly fixing PVC pipes on the rocky steep slope surface through the anchor bolts, wherein the arrangement direction of the PVC pipes is consistent with the inclination direction of the rocky steep slope surface, and ensuring that the bottom ends of the PVC pipes extend into drainage ditches;
(5) the PVC pipe is communicated with the drainage through hole on the side wall of the bottom of the intercepting drain through a PVC connecting pipe;
(6) spraying a foreign soil layer on the rocky abrupt slope surface;
the length of the PVC pipe and whether the pipe body is bent or not need to be designed according to the slope condition, and the PVC pipe can be properly bent along the convex condition of the slope at the slope where the larger bulge cannot be leveled, so that the PVC water-retaining pipe can better fit the slope;
the vertical distance between the PVC pipe and the slope surface can be selected according to the thickness of the alien soil spray seeding to be carried out, and after the alien soil spray seeding is ensured, the PVC pipe body is positioned in the middle of the thickness of the alien soil layer, so that the alien soil wraps the PVC water-retaining pipe, and the water in the PVC pipe can be more effectively conveyed to the whole alien soil layer under the drought or excessive sunshine condition.
Example 3: as shown in figures 1-2 and 7-8, a device for infiltrating a foreign soil base layer on a rocky steep slope by rainfall comprises a catch basin 1, a PVC pipe 3, the drainage ditch is characterized by comprising a drainage ditch 5 and permeable stone gaskets 9, wherein a slope top 10 of a rocky steep slope is provided with a cut-off ditch 1, the side wall of the bottom of the cut-off ditch 1 is provided with a drainage through hole, the drainage through hole extends towards the rocky steep slope, a slope toe 11 of the rocky steep slope is provided with the drainage ditch 5, a PVC pipe 3 is fixedly arranged on the rocky steep slope, the arrangement direction of the PVC pipe 3 is consistent with the inclination direction of the rocky steep slope, the water outlet of the drainage through hole is communicated with the water inlet at the top end of the PVC pipe 3 through a PVC connecting pipe, the bottom end of the PVC pipe 3 extends into the drainage ditch 5, the PVC pipe 3 is internally provided with the permeable stone gaskets 9 every 2m, the side wall of the PVC pipe 3 is uniformly provided with water flow through holes, a guest soil layer 2 is paved on the;
the vertical distance between the PVC pipes 3 and the rock steep slope surface is 12 cm, and the horizontal distance between every two adjacent PVC pipes 3 is 2 m;
the PVC pipe 3 is fixedly arranged on the rock steep slope surface through an anchor 4;
the insides of the PVC pipe 3 and the PVC connecting pipe are filled with sponge 7;
pebbles are uniformly paved in the drainage ditch;
the inner diameter of the drainage through hole is the same as that of the PVC pipe 3 and the PVC connecting pipe, and the PVC connecting pipe is fixedly connected with the top end of the PVC pipe 3; the inner diameter of the PVC pipe is 220 mm, the wall thickness of the PVC pipe is 4mm, the diameter of the water flow through holes on the pipe wall is 7 mm, and the distance between the water flow through holes in the PVC pipe in the longitudinal direction is 32 mm;
a construction method for infiltrating a foreign soil base layer on a rock steep slope surface by utilizing rainfall comprises the following specific steps:
(1) processing a PVC pipeline according to the gradient and height of the steep slope surface of the rock quality, and adjusting the PVC pipe according to the uneven gradient of the slope surface to ensure that the PVC pipe is consistent with the slope surface gradient; the side wall of the PVC pipeline is uniformly provided with water flow through holes, the PVC pipeline is filled with sponge, and permeable stone gaskets are arranged in the PVC pipeline every 2m, so that the water in the PVC pipeline can be protected by the permeable stone gaskets, and the water loss is reduced;
(2) excavating a water intercepting ditch at the slope top of the rock steep slope, wherein drainage through holes are uniformly formed in the side wall of the bottom of the water intercepting ditch and extend to the slope surface of the rock steep slope;
(3) a drainage ditch is dug at the slope toe of the steep rock slope, pebbles are paved in the drainage ditch, the flow velocity of water can be slowed down, the water storage function in the PVC pipe is better ensured,
(4) uniformly arranging anchor bolts on the rocky steep slope surface, uniformly fixing PVC pipes on the rocky steep slope surface through the anchor bolts, wherein the arrangement direction of the PVC pipes is consistent with the inclination direction of the rocky steep slope surface, and ensuring that the bottom ends of the PVC pipes extend into drainage ditches;
(5) the PVC pipe is communicated with the drainage through hole on the side wall of the bottom of the intercepting drain through a PVC connecting pipe;
(6) spraying a foreign soil layer on the rocky abrupt slope surface;
the length of the PVC pipe and whether the pipe body is bent or not need to be designed according to the slope condition, and the PVC pipe can be properly bent along the convex condition of the slope at the slope where the larger bulge cannot be leveled, so that the PVC water-retaining pipe can better fit the slope;
the vertical distance between the PVC pipe and the slope surface can be selected according to the thickness of the alien soil spray seeding to be carried out, and after the alien soil spray seeding is ensured, the PVC pipe body is positioned in the middle of the thickness of the alien soil layer, so that the alien soil wraps the PVC water-retaining pipe, and the water in the PVC pipe can be more effectively conveyed to the whole alien soil layer under the drought or excessive sunshine condition.

Claims (9)

1. A construction method for infiltrating a foreign soil base layer on a rock steep slope surface by utilizing rainfall is characterized by comprising the following steps of: utilize rainfall infiltration rock matter abrupt slope foreign soil base's device, the device includes catch basin (1), PVC pipe (3), escape canal (5), permeable rock gasket (9), the top of slope (10) of rock matter abrupt slope sets up catch basin (1), the bottom lateral wall of catch basin (1) sets up drainage through hole and drainage through hole extends to rock matter abrupt slope, drainage canal (5) is set up to the toe (11) of rock matter abrupt slope, fixed PVC pipe (3) of setting up on the rock matter abrupt slope and PVC pipe (3) arrange the direction unanimous with the slope direction of rock matter abrupt slope, the delivery port of drainage through hole passes through PVC connecting pipe and PVC pipe (3) water inlet intercommunication of top, the bottom of PVC pipe (3) extends to in escape canal (5), set up permeable rock gasket (9) every 2~3m in PVC pipe (3), the lateral wall of PVC pipe (3) evenly sets up rivers through hole, lay on the rock matter abrupt slope and lay in the soil layer (2) and PVC pipe (3) evenly bury in the middle part of rock matter abrupt slope;
the construction method comprises the following steps:
(1) processing a PVC pipeline according to the gradient and height of the steep slope surface of the rock quality, and adjusting the PVC pipe according to the uneven gradient of the slope surface to ensure that the PVC pipe is consistent with the slope surface gradient; uniformly arranging water flow through holes on the side wall of the PVC pipeline, and arranging permeable stone gaskets in the PVC pipeline every 2-3 m;
(2) excavating a water intercepting ditch at the slope top of the rock steep slope, wherein drainage through holes are uniformly formed in the side wall of the bottom of the water intercepting ditch and extend to the slope surface of the rock steep slope;
(3) excavating a drainage ditch at the slope toe of the rock steep slope;
(4) uniformly arranging anchor bolts on the rocky steep slope surface, uniformly fixing PVC pipes on the rocky steep slope surface through the anchor bolts, wherein the arrangement direction of the PVC pipes is consistent with the inclination direction of the rocky steep slope surface, and ensuring that the bottom ends of the PVC pipes extend into drainage ditches;
(5) the PVC pipe is communicated with the drainage through hole on the side wall of the bottom of the intercepting drain through a PVC connecting pipe;
(6) and spraying a foreign soil layer on the steep rocky slope.
2. The construction method for infiltrating foreign soil base course on the rocky steep slope by utilizing rainfall as claimed in claim 1, wherein the construction method comprises the following steps: the vertical distance between the PVC pipes (3) and the rock mass steep slope surface is 10-15 cm, and the horizontal distance between every two adjacent PVC pipes (3) is 1-2 m.
3. The construction method for infiltrating foreign soil base course on the rocky steep slope by utilizing rainfall as claimed in claim 2, wherein: the PVC pipe (3) is fixedly arranged on the rock steep slope surface through the anchor bolts (4).
4. The construction method for infiltrating foreign soil base course on rock steep slope surface by utilizing rainfall according to any one of claims 1 to 3, characterized by comprising the following steps: geotechnical cloth (6) is filled in the PVC pipe (3) and the PVC connecting pipe.
5. The construction method for infiltrating foreign soil base course on rock steep slope surface by utilizing rainfall according to any one of claims 1 to 3, characterized by comprising the following steps: the insides of the PVC pipe (3) and the PVC connecting pipe are filled with sponges (7).
6. The construction method for infiltrating foreign soil base course on the rocky steep slope by utilizing rainfall as claimed in claim 5, wherein: the sponge (7) is cylindrical columnar sponge, and humus is filled in a hollow cylinder of the cylindrical columnar sponge.
7. The construction method for infiltrating foreign soil base course on the rocky steep slope by utilizing rainfall as claimed in claim 1, wherein the construction method comprises the following steps: pebbles are uniformly paved in the drainage ditch.
8. The construction method for infiltrating foreign soil base course on the rocky steep slope by utilizing rainfall as claimed in claim 1, wherein the construction method comprises the following steps: the drainage through hole is the same with the inner diameter of the PVC pipe (3) and the PVC connecting pipe, and the PVC connecting pipe is fixedly connected with the top end of the PVC pipe (3).
9. The construction method for infiltrating foreign soil base course on the rocky steep slope by utilizing rainfall as claimed in claim 1, wherein the construction method comprises the following steps: geotextile, sponge or cylindrical sponge-humus soil is filled in the PVC pipeline in the step (1), and pebbles are laid in the drainage ditch in the step (3).
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