CN114908777B - Slope drainage device and drainage method based on stratum with different weathering degrees - Google Patents

Abstract

The invention discloses a slope drainage device and a drainage method based on stratum with different weathering degrees, which relate to the technical field of highway slope engineering and comprise the following steps: the full-weathering layer drain pipe comprises a full-weathering layer pipe body, a full-weathering layer first filter layer, a full-weathering layer second filter layer, a full-weathering layer end part first filter layer and a full-weathering layer end part second filter layer, and full-weathering layer drain holes are formed in the side wall of the full-weathering layer pipe body; the strong weathering layer drain pipe comprises a strong weathering layer pipe body and a strong weathering layer filter layer, strong weathering layer drain holes are formed in the side wall of the strong weathering layer pipe body, and a strong weathering layer end filter layer is fixed at the inner end of the strong weathering layer drain pipe; the middle weathering layer drain pipe, the middle weathering layer filter layer is fixed on the outer side of the middle weathering layer pipe body, the side wall of the middle weathering layer pipe body is provided with middle weathering layer drain holes, and the middle weathering layer end filter layer is fixed at the inner end of the middle weathering layer drain pipe. According to the invention, different drainage pipes are adopted according to different weathering degrees of the side slope.

Description

Slope drainage device and drainage method based on stratum with different weathering degrees

Technical Field

The invention relates to the technical field of highway slope engineering, in particular to a slope drainage device and a drainage method based on stratum with different weathering degrees.

Background

Common slope formation distributions mainly include fully weathered formations, strongly weathered formations, and stroke weathered formations. Wherein, the fully weathered rock mainly comprises fine grain components such as fourth-period sediments, fine sand and the like; the particle diameter of rock and soil contained in the strong weathered rock stratum is larger than that of the fully weathered rock stratum; the original rock structure of the rock stratum with medium weathering degree is relatively kept intact, and the rock grain size is large.

Drainage holes are generally adopted for drainage of underground water in the slope body, and gravity of water is utilized for self-overflow drainage. A common drainage structure is to make inclined drainage holes on one side of the soil body, and the orifice is inclined downwards. The drain pipe is inserted into the drain hole, and water flows into or permeates into the drain pipe and flows out of the drain hole along the drain pipe.

However, the existing drain pipe cannot effectively drain underground water in a slope due to the blockage of rocks, and sediments of different strata are different, so that a single drain pipe cannot be applied to the three strata.

Therefore, a new slope drainage device and drainage method based on layers with different weathering degrees are urgently needed by highway slope engineering researchers to solve the problems.

Disclosure of Invention

The invention aims to provide a slope drainage device and a drainage method based on stratum with different weathering degrees, which are used for solving the technical problems in the prior art, and drainage is performed by adopting drainage pipes with different types according to stratum with different weathering degrees.

In order to achieve the above object, the present invention provides the following solutions:

the invention discloses a slope drainage device based on stratum with different weathering degrees, which comprises:

the full-weathering layer drain pipe is provided with a full-weathering layer pipe body, a full-weathering layer first filter layer and a full-weathering layer second filter layer from inside to outside in sequence, the side wall of the full-weathering layer pipe body is provided with a plurality of full-weathering layer drain holes, the full-weathering layer drain pipe is used for being installed in a full-weathering layer drill hole on a full-weathering layer side slope, the outer end of the full-weathering layer drain pipe is located at an orifice of the full-weathering layer drill hole, the inner end of the full-weathering layer drain pipe is fixedly provided with a full-weathering layer end part first filter layer, and one surface of the full-weathering layer end part first filter layer far away from the full-weathering layer drain pipe is fixedly provided with a full-weathering layer end part second filter layer;

the strong weathering layer drain pipe comprises a strong weathering layer pipe body and a strong weathering layer filter layer, the strong weathering layer filter layer is fixed on the outer side of the strong weathering layer pipe body, a plurality of strong weathering layer drain holes are formed in the side wall of the strong weathering layer pipe body, the strong weathering layer drain pipe is used for being installed in a strong weathering layer drill hole on a strong weathering layer slope, the outer end of the strong weathering layer drain pipe is located at an orifice of the strong weathering layer drill hole, and a strong weathering layer end filter layer is fixed at the inner end of the strong weathering layer drain pipe;

well efflorescence layer drain pipe, well efflorescence layer drain pipe includes well efflorescence layer body and well efflorescence layer filter layer, well efflorescence layer filter layer is fixed in the outside of well efflorescence layer body, be equipped with a plurality of well efflorescence layer wash port on the lateral wall of well efflorescence layer body, well efflorescence layer drain pipe is arranged in installing in well efflorescence layer drilling on well efflorescence layer side slope, the outer end of well efflorescence layer drain pipe is located well efflorescence layer drilling's drill way department, well efflorescence layer drain pipe's inner end is fixed with well efflorescence layer tip filter layer.

Preferably, the fully weathered layer pipe body is a PVC pipe, the fully weathered layer first filter layer and the fully weathered layer end part first filter layer are both non-woven fabric filter cotton, and the fully weathered layer second filter layer and the fully weathered layer end part second filter layer are both activated carbon filter cotton.

Preferably, the diameter of the outer wall of the fully weathered layer pipe body is 50mm, the diameter of the outer wall of the fully weathered layer first filter layer is 100mm, the diameter of the outer wall of the fully weathered layer second filter layer is 150mm, the inner diameter of the fully weathered layer drill hole is 170mm, the thickness of the fully weathered layer end portion first filter layer is 100mm, and the thickness of the fully weathered layer end portion second filter layer is 100mm.

Preferably, the strong weathering layer pipe body is a PVC pipe, and the strong weathering layer filter layer and the strong weathering layer end filter layer are both activated carbon filter cotton.

Preferably, the diameter of the outer wall of the strong-weathered pipe body is 50mm, the diameter of the outer wall of the strong-weathered layer filtering layer is 100mm, the inner diameter of the strong-weathered layer drilling hole is 120mm, and the thickness of the strong-weathered layer end filtering layer is 100mm.

Preferably, the middle weathering layer pipe body is a PVC pipe, and the middle weathering layer filter layer and the middle weathering layer end filter layer are plastic blind pipes.

Preferably, the diameter of the outer wall of the middle fluidized layer pipe body is 50mm, the diameter of the outer wall of the middle fluidized layer filtering layer is 100mm, the inner diameter of the middle fluidized layer drilling hole is 120mm, and the thickness of the middle fluidized layer end filtering layer is 100mm.

The invention also discloses a drainage method of the slope drainage device based on the stratum with different weathering degrees, which comprises the following steps:

s1, judging the weathering degree of a stratum;

s2, manufacturing corresponding drainage pipes according to different weathering degree strata of the side slope;

s3, drilling construction, namely drilling holes with different apertures at the position of the slope where the drain pipe needs to be arranged according to the requirements;

s4, arranging a drain pipe, and placing the manufactured drain pipe into a corresponding drilling hole according to engineering requirements.

Compared with the prior art, the invention has the following technical effects:

the invention provides a drain pipe corresponding to the stratum with different weathering degrees. The drain pipe is simple in manufacture and convenient to construct, can meet the requirements of highway slope drainage, selects different pipelines for different working conditions, and reduces material cost to the greatest extent on the premise of ensuring engineering needs. When stability of the side slope is reduced due to influence of groundwater, the water draining device is used for draining the side slope, so that stability of the side slope of the highway is improved, service life of the highway is prolonged, and the problem that a drain pipe is easy to block in a traditional drainage mode is solved.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are needed in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic structural diagram of a slope drainage device based on layers with different weathering degrees according to an embodiment of the present invention;

FIG. 2 is a side view of a fully weathered layer drain pipe in a side slope drainage device based on layers of different degrees of weathering according to an embodiment of the present invention;

FIG. 3 is a cross-sectional view of a fully weathered layer drain pipe in a side slope drainage device based on layers of different degrees of weathering according to an embodiment of the present invention;

FIG. 4 is a side view of a strong weathering layer drain pipe in a slope drainage apparatus based on different weathering layers in accordance with an embodiment of the present invention;

FIG. 5 is a cross-sectional view of a strong weathering layer drain pipe in a slope drainage apparatus based on different weathering layers in accordance with an embodiment of the present invention;

FIG. 6 is a side view of a drainage pipe with a fluidized bed in a slope drainage apparatus based on different levels of weathering in accordance with an embodiment of the present invention;

FIG. 7 is a cross-sectional view of a drainage pipe with a fluidized bed in a slope drainage apparatus based on different levels of weathering in accordance with an embodiment of the present invention;

in the figure: 1-fully weathered rock formation side slope; 11-a fully weathered layer drain; 111-fully weathered tube bodies; 112-a fully weathered layer first filter layer; 113-a full-weathered layer second filter layer; 114-a first filter layer at the end of the fully weathered layer; 115-a second filter layer at the end of the fully weathered layer; 12-drilling a fully weathered layer; 2-strongly weathered rock slope; 21-a strong weathering layer drain pipe; 211-strong-wind-layer tube body; 212-a strong weathering layer filter layer; 213-strong weathering layer end filter layer; 22-drilling a strong weathering layer; 3-apoplexy transforming the rock stratum slope; 31-a fluidized bed drain pipe; 311-stroke cladding tube body; 312—a middle weathered layer filter layer; 313-a fluidized bed end filter layer; 32-drilling a middle weathered layer; 100-a slope drainage device based on stratum with different weathering degrees.

Detailed Description

The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.

The invention aims to provide a slope drainage device and a drainage method based on stratum with different weathering degrees, which are used for solving the technical problems in the prior art, and drainage is performed by adopting drainage pipes with different types according to stratum with different weathering degrees.

In order that the above-recited objects, features and advantages of the present invention will become more readily apparent, a more particular description of the invention will be rendered by reference to the appended drawings and appended detailed description.

Embodiment 1,

As shown in fig. 1 to 7, the present embodiment provides a slope drainage device 100 based on strata with different degrees of weathering, including:

the underground full-weathered layer drainage pipe 11 is characterized in that a full-weathered layer pipe body 111, a full-weathered layer first filter layer 112 and a full-weathered layer second filter layer 113 are sequentially arranged on the full-weathered layer drainage pipe 11 from inside to outside, a plurality of full-weathered layer drainage holes are formed in the side wall of the full-weathered layer pipe body 111, the full-weathered layer drainage holes are circular holes with the diameter of 150mm, underground water can flow into the full-weathered layer pipe body 111 through the full-weathered layer drainage holes, the full-weathered layer drainage pipe 11 is used for being installed in a full-weathered layer drilling hole 12 on a full-weathered layer side slope 1, the outer end of the full-weathered layer drainage pipe 11 is positioned at the orifice of the full-weathered layer drilling hole 12, in order to better guide underground water out, the full-weathered layer pipe body 111 can be extended out of the orifice of the full-weathered layer drilling hole 12 for a certain distance, the inner end of the full-weathered layer drainage pipe 11 is fixedly provided with a full-weathered layer end first filter layer 114, one side of the full-weathered layer end first filter layer 114 far away from the full-weathered layer drainage pipe 11 is fixedly provided with a full-weathered layer end second filter layer 115, and the full-weathered layer end of the full-weathered layer 11 is used for blocking the full-weathered layer 11, and the effect of blocking is prevented from entering the underground full-weathered layer 11 from the inner end through the filter layer end;

the strong weathering layer drain pipe 21, the strong weathering layer drain pipe 21 includes the strong weathering layer body 211 and strong weathering layer filter layer 212, the strong weathering layer filter layer 212 is fixed to the outside of the strong weathering layer body 211, there are several strong weathering layer drain holes on the sidewall of the strong weathering layer body 211, the strong weathering layer drain hole is the round hole with 100mm diameter, the groundwater can enter the strong weathering layer body 211 after the filtering action of the strong weathering layer filter layer 212, the strong weathering layer drain pipe 21 is used for installing in the strong weathering layer drilling 22 on the strong weathering layer side slope 2, the outer end of the strong weathering layer drain pipe 21 is located in the hole mouth of the strong weathering layer drilling 22, the outer end of the strong weathering layer drain pipe 211 will stretch out a distance of the hole mouth of the strong weathering layer drilling 22 too, the inner end of the strong weathering layer drain pipe 21 is fixed with the strong weathering layer end filter layer 213, filter the groundwater that will enter from the inner end of the strong weathering layer drain pipe 21;

the middle weathering layer drain pipe 31, the middle weathering layer drain pipe 31 includes middle weathering layer body 311 and middle weathering layer filter layer 312, middle weathering layer filter layer 312 is fixed in the outside of middle weathering layer body 311, be equipped with a plurality of middle weathering layer wash port on the lateral wall of middle weathering layer body 311, middle weathering layer wash port is the circular hole that the diameter is 100mm, specific quantity is adjusted according to actual need, middle weathering layer drain pipe 31 is arranged in installing in the middle weathering layer drilling 32 on middle weathering layer slope 3, the outer end of middle weathering layer drain pipe 31 is located the drill way department of middle weathering layer drilling 32, and the outer end of middle weathering layer body 311 stretches out the drill way department of middle weathering layer drilling 32 a distance, the inner end of middle weathering layer drain pipe 31 is fixed with middle weathering layer tip filter layer 313, the effect is the impurity that is used for filtering groundwater equally.

When the novel weathered rock slope is used, different water drainage pipes are installed according to strata with different weathered degrees, specifically, the fully weathered layer water drainage pipe 11 is installed on the fully weathered rock slope 1, the strong weathered layer water drainage pipe 21 is installed on the strong weathered rock slope 2, and the middle weathered layer water drainage pipe 31 is installed on the middle weathered rock slope 3. After the installation, to the full-weathering layer drain pipe 11, the first filter layer 112 of full-weathering layer on the full-weathering layer drain pipe 11, the second filter layer 113 of full-weathering layer, the first filter layer 114 of full-weathering layer tip and the second filter layer 115 of full-weathering layer tip can effectually filter out the impurity of groundwater in the full-weathering layer, concretely, groundwater near the lateral wall of the full-weathering layer drain pipe 11 can loop through the second filter layer 113 of full-weathering layer, the first filter layer 112 of full-weathering layer and the drain hole of full-weathering layer, finally enter into the inside of the full-weathering layer drain pipe 11, and groundwater near the inner end of the full-weathering layer drain pipe 11 can loop through the second filter layer 115 of full-weathering layer tip and the first filter layer 114 of full-weathering layer tip and then enter into the inside of the full-weathering layer pipe 111, so that large particle impurities in the full-weathering layer pipe 111 can be avoided, thereby causing the problem of blockage. For the strongly weathered layer drain pipe 21, the strongly weathered layer filter layer 212 and the strongly weathered layer end filter layer 213 can effectively filter out impurities of groundwater in the strongly weathered rock layer, specifically, the groundwater near the side wall of the strongly weathered layer drain pipe 21 sequentially passes through the strongly weathered layer filter layer 212 and the strongly weathered layer drain hole and then enters the strongly weathered layer pipe 211, and the groundwater near the inner end of the strongly weathered layer drain pipe 21 can enter the strongly weathered layer pipe 211 after passing through the strongly weathered layer end filter layer 213, so as to prevent the impurities from entering the strongly weathered layer pipe 211. Similarly, for the middle weathered layer drain pipe 31, the middle weathered layer filter layer 312 and the middle weathered layer end filter layer 313 can effectively filter out impurities of groundwater in the middle weathered layer, specifically, the groundwater near the side wall of the middle weathered layer drain pipe 31 can sequentially pass through the middle weathered layer filter layer 312 and the middle weathered layer drain hole and then enter the middle weathered layer pipe body 311, and the groundwater near the inner end of the middle weathered layer drain pipe 31 can enter the middle weathered layer pipe body 311 after passing through the middle weathered layer end filter layer 313, so that the impurities are prevented from entering the middle weathered layer pipe body 311 to cause blockage.

In this embodiment, the fully weathered layer pipe 111 is a PVC pipe, the PVC pipe is a common pipe in the market, and the PVC pipe is mainly made of hard polyvinyl chloride, and has the advantages of corrosion resistance, high elastic modulus, large capacity, small mass, high impact resistance, high ring stiffness, etc., and is used as a main support structure and a water guide structure of the drainage system, and is arranged in different water filtering materials. The first filter layer 112 of the fully weathered layer and the first filter layer 114 of the end part of the fully weathered layer are both non-woven filter cotton, and the non-woven filter cotton is known as polyester fiber, and has the advantages of relatively stable quality, larger dust holding capacity, strong moisture resistance and the like. The second filter layer 113 of the fully weathered layer and the second filter layer 115 of the end part of the fully weathered layer are all activated carbon filter cotton, and the activated carbon filter cotton has the advantages of small wind resistance coefficient, high strength, good formability, good corrosion resistance and the like, has good performance in water quality purification and sewage treatment, and has good desorption regeneration performance and can be reused, so that the activated carbon filter cotton is applied to the primary filtration of the drainage of the fully weathered rock stratum and is used for preliminarily filtering a large amount of rock particles and silt in the fully weathered rock stratum.

In this embodiment, the diameter of the outer wall of the fully weathered layer tube 111 is 50mm, the diameter of the outer wall of the fully weathered layer first filter layer 112 is 100mm, and when the fully weathered layer tube is manufactured, only a single-layer non-woven fabric filter cotton is wrapped on the outer wall of the fully weathered layer tube 111, and a plurality of wraps are needed until the diameter of the outer wall of the fully weathered layer first filter layer 112 reaches 100mm. The outer wall diameter of the second filter layer 113 of the completely weathered layer is 150mm, and similarly, the activated carbon filter cotton is wrapped on the outer side of the non-woven fabric filter cotton, after the wrapping is completed, the activated carbon filter cotton is bound and fixed by using a rope, and other fixing modes can be adopted by those skilled in the art. The inner diameter of the full-weathered layer drilling hole 12 is 170mm, so that the full-weathered layer drain pipe 11 is convenient to put in. The thickness of the first filter layer 114 at the end part of the full-weathered layer is 100mm, the thickness of the second filter layer 115 at the end part of the full-weathered layer is 100mm, the second filter layer 115 at the end part of the full-weathered layer is positioned on the outer side of the first filter layer 114 at the end part of the full-weathered layer, and the second filter layer 115 at the end part of the full-weathered layer wraps the first filter layer 114 at the end part of the full-weathered layer and then is fixed by ropes. It should be noted that, the width direction of the second filter layer 115 at the end of the fully weathered layer and the first filter layer 114 at the end of the fully weathered layer refer to the axial direction of the body 111 of the fully weathered layer, and taking the first filter layer 114 at the end of the fully weathered layer as an example, it can be understood that a plurality of single-layer non-woven fabric filter cottons are vertically attached to the inner end of the drain pipe 11 of the fully weathered layer one by one, and the second filter layer 115 at the end of the fully weathered layer is the same, so that description thereof will not be repeated.

In this embodiment, the pipe body 211 is also a PVC pipe, and the filter layer 212 of the strong weathered layer and the filter layer 213 of the end of the strong weathered layer are both activated carbon filter cotton, so as to filter a larger amount of rock particles and silt.

In this embodiment, the diameter of the outer wall of the strongly weathered layer pipe body 211 is 50mm, the diameter of the outer wall of the strongly weathered layer filter layer 212 is 100mm, and the inner diameter of the strongly weathered layer drill hole 22 is 120mm, so that the strongly weathered layer drain pipe 21 can be easily installed. The thickness of the strong weathering layer end filter layer 213 was 100mm, and the thickness direction thereof was the axial direction of the strong weathering layer tube body 211.

In this embodiment, the middle-melting layer tube 311 is a PVC tube, the middle-melting layer filter layer 312 and the middle-melting layer end filter layer 313 are plastic blind tubes, and the plastic blind tubes are three-dimensional porous materials formed by heating and melting thermoplastic synthetic resin, extruding fiber filaments through a nozzle, stacking the fiber filaments, and sintering the contact points. The plastic blind pipe has the advantages of good water collecting property, good water drainage property, strong compression resistance, good durability and the like, but is applied to the outer side of the middle weathering layer pipe body 311 due to the high aperture ratio. Here, the plastic blind pipe at the middle weathered layer filter layer 312 is only required to be installed by sleeving the plastic blind pipe on the outer side of the middle weathered layer pipe body 311. Regarding the plastic blind pipe at the middle weathered layer end filtering layer 313, the plastic blind pipe is installed at the inner end of the middle weathered layer drain pipe 31 after being extruded during installation, or the plastic blind pipe can be cut into a sheet-shaped structure, and then a plurality of sheet-shaped structures are attached and fixed at the inner end of the middle weathered layer drain pipe 31.

In this embodiment, the outer wall diameter of the middle weathering tube body 311 is 50mm, the outer wall diameter of the middle weathering layer filter layer 312 is 100mm, and the inner diameter of the middle weathering layer drill hole 32 is 120mm, which facilitates the installation of the middle weathering tube body 311. The thickness of the middle weathered layer end filter layer 313 was 100mm, and similarly, the thickness direction here was the axial direction of the middle weathered layer tube body 311.

Embodiment II,

The embodiment provides a drainage method of a slope drainage device based on stratum with different weathering degrees, which comprises the following steps:

s1, judging the weathering degree of the stratum, and observing which layer of the stratum is completely weathered, strongly weathered and weathered;

s2, manufacturing a corresponding drain pipe according to stratum with different weathering degrees of the side slope, and if the stratum is a completely weathered stratum, adopting activated carbon filter cotton and non-woven fabric filter cotton as water filtering materials, so as to manufacture a completely weathered stratum drain pipe 11; in the case of a strongly weathered rock layer, activated carbon filter cotton is used as a water filtering material, thereby making a strongly weathered layer drain pipe 21; in the case of a weathered rock formation, a plastic blind pipe is used as a water filtering material, thereby making a middle weathered layer drain pipe 31;

s3, drilling construction, namely drilling holes with different apertures at the position of the side slope where the drain pipe needs to be arranged according to the requirements, wherein the aperture of the drilling holes required by the fully weathered rock stratum is 170mm, and the aperture of the drilling holes required by the strong weathered rock stratum and the medium weathered rock stratum is 120mm;

s4, arranging a drain pipe, and placing the manufactured drain pipe into a corresponding drilling hole according to engineering requirements.

The principles and embodiments of the present invention have been described in this specification with reference to specific examples, the description of which is only for the purpose of aiding in understanding the method of the present invention and its core ideas; also, it is within the scope of the present invention to be modified by those of ordinary skill in the art in light of the present teachings. In view of the foregoing, this description should not be construed as limiting the invention.

Claims (5)

1. Slope drainage device based on different weathering degree stratum, characterized by comprising:

the full-weathering layer drain pipe is provided with a full-weathering layer pipe body, a full-weathering layer first filter layer and a full-weathering layer second filter layer from inside to outside in sequence, the side wall of the full-weathering layer pipe body is provided with a plurality of full-weathering layer drain holes, the full-weathering layer drain pipe is used for being installed in a full-weathering layer drill hole on a full-weathering layer side slope, the outer end of the full-weathering layer drain pipe is located at an orifice of the full-weathering layer drill hole, the inner end of the full-weathering layer drain pipe is fixedly provided with a full-weathering layer end part first filter layer, and one surface of the full-weathering layer end part first filter layer far away from the full-weathering layer drain pipe is fixedly provided with a full-weathering layer end part second filter layer; the fully-weathered layer pipe body is a PVC pipe, the fully-weathered layer first filter layer and the fully-weathered layer end part first filter layer are both non-woven fabric filter cotton, and the fully-weathered layer second filter layer and the fully-weathered layer end part second filter layer are both activated carbon filter cotton;

the strong weathering layer drain pipe comprises a strong weathering layer pipe body and a strong weathering layer filter layer, the strong weathering layer filter layer is fixed on the outer side of the strong weathering layer pipe body, a plurality of strong weathering layer drain holes are formed in the side wall of the strong weathering layer pipe body, the strong weathering layer drain pipe is used for being installed in a strong weathering layer drill hole on a strong weathering layer slope, the outer end of the strong weathering layer drain pipe is located at an orifice of the strong weathering layer drill hole, and a strong weathering layer end filter layer is fixed at the inner end of the strong weathering layer drain pipe; the strong weathering layer pipe body is a PVC pipe, and the strong weathering layer filter layer and the strong weathering layer end filter layer are both activated carbon filter cotton;

the medium weathering layer drain pipe comprises a medium weathering layer pipe body and a medium weathering layer filter layer, the medium weathering layer filter layer is fixed on the outer side of the medium weathering layer pipe body, a plurality of medium weathering layer drain holes are formed in the side wall of the medium weathering layer pipe body, the medium weathering layer drain pipe is used for being installed in a medium weathering layer drill hole on a medium weathering layer side slope, the outer end of the medium weathering layer drain pipe is located at an orifice of the medium weathering layer drill hole, and a medium weathering layer end filter layer is fixed at the inner end of the medium weathering layer drain pipe; the middle weathering layer filtering layer and the middle weathering layer end filtering layer are plastic blind pipes.

2. The slope drainage device based on different levels of weathering formation of claim 1, wherein: the outer wall diameter of the full-weathering layer pipe body is 50mm, the outer wall diameter of the first filter layer of the full-weathering layer is 100mm, the outer wall diameter of the second filter layer of the full-weathering layer is 150mm, the inner diameter of the full-weathering layer drill hole is 170mm, the thickness of the first filter layer of the end part of the full-weathering layer is 100mm, and the thickness of the second filter layer of the end part of the full-weathering layer is 100mm.

3. The slope drainage device based on different levels of weathering formation of claim 1, wherein: the outer wall diameter of the strong-weathered pipe body is 50mm, the outer wall diameter of the strong-weathered layer filter layer is 100mm, the inner diameter of the strong-weathered layer drill hole is 120mm, and the thickness of the strong-weathered layer end filter layer is 100mm.

4. The slope drainage device based on different levels of weathering formation of claim 1, wherein: the outer wall diameter of the middle fluidized bed pipe body is 50mm, the outer wall diameter of the middle fluidized bed filter layer is 100mm, the inner diameter of the middle fluidized bed drill hole is 120mm, and the thickness of the middle fluidized bed end filter layer is 100mm.

5. A drainage method based on the slope drainage device of the stratum with different degrees of weathering according to any one of claims 1 to 4, characterized by comprising the following steps:

s1, judging the weathering degree of a stratum;

s2, manufacturing corresponding drainage pipes according to different weathering degree strata of the side slope;

s3, drilling construction, namely drilling holes with different apertures at the position of the slope where the drain pipe needs to be arranged according to the requirements;

s4, arranging a drain pipe, and placing the manufactured drain pipe into a corresponding drilling hole according to engineering requirements.

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