CN115679764A - Semi-permeable waterway surface drainage structure - Google Patents

Abstract

The invention relates to the field of permeable roads, in particular to a semi-permeable waterway surface drainage structure, which comprises a water collection assembly; the water collecting assembly comprises a permeable concealed pipe which is arranged at the joint surface of the permeable base layer and the cushion layer and respectively extends to the permeable base layer and the cushion layer, a curb stone strip which is buried in the soil at the road side, a first water collecting cavity which is communicated with the permeable concealed pipe and a water collecting well which is buried in the soil, arranged below the curb stone strip and communicated with the first water collecting cavity through a pipeline, wherein the curb stone strip is provided with a first water collecting cavity which is communicated with the permeable concealed pipe; according to the invention, the water seepage concealed pipe arranged between the water seepage base layer and the cushion layer, the curb stone strip provided with the first water collecting cavity, the water collecting well, the suspension valve assembly and the overflow pipe arranged in the water collecting well and the water distribution pipe arranged in the natural soil foundation are arranged, so that water intercepted by the cushion layer in the semi-permeable road is efficiently and intensively collected and uniformly diffused into the natural soil foundation below the rammed soil layer through the water collecting well and the water distribution pipe, and the phenomenon that the roadbed is damaged by the rammed soil layer due to rainwater is avoided, and the stability of the roadbed is reduced.

Description

Semi-permeable waterway surface drainage structure

Technical Field

The invention relates to the field of permeable roads, in particular to a semi-permeable waterway drainage structure.

Background

The rigid pavement permeable base layer can effectively remove water seeped into the pavement, but also increases the possibility that water seeped into the pavement structure continuously seeps downwards through the permeable base layer. Therefore, a water-impermeable cushion layer (impermeable sub-base layer) must be provided under the water-permeable base layer to prevent surface water from infiltrating into the roadbed, affecting the strength and stability of the roadbed.

And traditional road bed and road surface basic unit material are low water permeability material and do not have drainage structures, and the free water that permeates in the road surface structure is difficult to be followed the road bed lower part and is walked to bottom or both sides, encloses for a long time inside the structure, causes road bed, structural layer material to be soaked, and intensity reduces, and road structure bearing capacity descends. The stability of the pavement structure and the safe use of the road can be endangered under the coupling action of traffic loads.

Disclosure of Invention

1. Technical problem to be solved

Aiming at the problems in the prior art, the invention aims to provide a semi-permeable waterway drainage structure, which can realize quick drainage of semi-permeable roads, improve drainage efficiency and ensure safety of roadbeds.

2. Technical scheme

In order to solve the above problems, the present invention adopts the following technical solutions.

The utility model provides a semi-permeable waterway surface drainage structure, includes the rammed earth layer, the impermeable layer, the bed course, the basic unit and the surface course of permeating water of natural soil base from the bottom up construction in proper order, still includes:

the water collecting assembly comprises a permeation concealed pipe which is arranged at the joint surface of the permeable base layer and the cushion layer and respectively extends to the permeable base layer and the cushion layer, a curb strip which is buried in soil at the side of a road, a first water collecting cavity which is communicated with the permeation concealed pipe is arranged on the curb strip, and a water collecting well which is buried in the soil, is arranged below the curb strip and is communicated with the first water collecting cavity through a pipeline;

the water distribution assembly comprises a water distribution pipe embedded in the natural soil foundation and a second sewer pipe communicated with the water distribution pipe and the water collection well; a water seepage regulating component is arranged in the water collecting well;

the water seepage amount adjusting assembly comprises a suspension valve assembly arranged at the communication part of the second sewer pipe and the water collecting well and an overflow pipe arranged at one side of the water collecting well far away from the suspension valve assembly, and the suspension valve assembly comprises a hemispherical cover arranged at the communication part of the second sewer pipe and the water collecting well, a hemispherical valve which is nested in the hemispherical cover and is hinged with the hemispherical cover, a connecting rod fixedly connected with the front end of the hemispherical valve and a floating ball fixedly connected with one end of the connecting rod far away from the hemispherical valve;

the overflow pipe is a siphon pipe, the water outlet of the overflow pipe positioned on the inner side of the water collecting well is as high as the hemispherical valve, and the water outlet of the outer end of the overflow pipe is lower than the lower end face of the water collecting well.

As a further scheme of the invention: the second drainage structure comprises a second water collecting cavity and a third sewer pipe, wherein the second water collecting cavity is formed in the upper portion of the curb stone strip, the opening of the second water collecting cavity is higher than the water seepage surface layer, and the third sewer pipe is used for communicating the second water collecting cavity with the first sewer pipe.

As a further scheme of the invention: and a middle cushion layer for isolating the permeable base layer and the cushion layer is filled between the permeable concealed pipes.

As a further scheme of the invention: the infiltration hidden pipe is the pipe that sets up along road width direction level, and evenly distributed's infiltration hole is seted up on infiltration hidden pipe upper portion, and the infiltration hole is the toper through-hole of outer narrow interior width.

As a further scheme of the invention: the contact surfaces of the permeable base layer and the cushion layer which are positioned on the permeable base layer and the cushion layer are provided with semicircular strip-shaped grooves.

As a further scheme of the invention: the hemisphere cover is a hollow hemisphere cover, the hemisphere valve is of a hemisphere structure, and the hemisphere valve is hinged with the inner wall of the hemisphere cover through a cross shaft.

As a further scheme of the invention: the first water collecting cavity and the second water collecting cavity are both strip-shaped grooves, and filter screens are installed in the openings, facing the road surface, of the second water collecting cavity in an embedded mode.

As a further scheme of the invention: the third downcomer is the vertical strip venturi tube that sets up, and first water collecting cavity and third downcomer are through being right angle second downcomer intercommunication, and second downcomer and third downcomer are perpendicular to be communicated.

As a further scheme of the invention: the water distribution pipe is a straight cylindrical circular pipe buried in the natural soil foundation, and water distribution holes penetrating through the water distribution pipe are formed in the outer wall of the circumference of the lower part of the water distribution pipe.

As a further scheme of the invention: a construction process of a semi-permeable waterway surface drainage structure comprises the following steps:

excavating a strip-shaped ditch by adopting excavating equipment, and embedding a water distribution pipe in a natural soil foundation by using a pipe laying machine;

backfilling the excavated strip-shaped ditch and intermittently tamping the excavated strip-shaped ditch by using tamping equipment and a road roller to form a rammed soil layer;

thirdly, pouring dense-graded cement stabilizing gravel to form an anti-seepage layer;

pouring the cushion layer by adopting the bituminous sand, and reserving strip-shaped grooves which are distributed at equal intervals when the cushion layer is poured;

placing the penetration concealed pipe in the strip-shaped groove of the cushion layer, and then pouring a middle cushion layer, wherein the height of the middle cushion layer is smaller than the radius of the penetration concealed pipe; finally, pouring the permeable base layer by using graded broken stones;

step six, carrying out a permeable surface layer by adopting fine-grain asphalt concrete;

and seventhly, burying curb strips and a water collecting well at the side edge of the pavement, and communicating the first sewer pipe, the second sewer pipe and the third sewer pipe.

3. Advantageous effects

Compared with the prior art, the invention has the advantages that:

(1) According to the invention, the water seepage concealed pipe arranged between the water seepage base layer and the cushion layer, the curb stone strip provided with the first water collecting cavity, the water collecting well, the suspension valve assembly and the overflow pipe arranged in the water collecting well and the water distribution pipe arranged in the natural soil foundation are arranged, so that water intercepted by the cushion layer in the semi-permeable road is efficiently and intensively collected and uniformly diffused into the natural soil foundation below the rammed soil layer through the water collecting well and the water distribution pipe, and the phenomenon that the roadbed is damaged by the rammed soil layer due to rainwater is avoided, and the stability of the roadbed is reduced.

(2) According to the invention, through the arrangement of the suspension valve assembly and the overflow pipe which is the siphon pipe, a large amount of rainwater enters the water collecting well in a time period with large rainfall, so that the water pressure in the water collecting well entering the water distribution pipe is large, when the water amount in the water collecting well is large, the liquid level is lifted to push the floating ball to move upwards, the floating ball drives the half ball valve to rotate through the connecting rod, and the half ball valve seals the half ball cover so as to prevent the rainwater from continuously entering the water distribution pipe.

(3) According to the invention, the curb stone strips provided with the second water collecting cavities are arranged to collect rainwater possibly accumulated on the water permeable surface layer, so that the rainwater is prevented from accumulating on the water permeable surface layer to cause vehicle skid, the second drainage mechanism solves the problem that the rainwater cannot seep down in time when the rainfall is large, and the road drainage effect is further ensured.

(4) According to the invention, the middle cushion layer is poured between the water seepage concealed pipes, so that the permeable base layer is prevented from being directly contacted with the cushion layer, rainwater is prevented from directly infiltrating the cushion layer, the water-resisting performance of the cushion layer is improved, and the roadbed is further protected.

(5) The invention is provided with the water seepage hidden pipe with the water seepage holes which are narrow outside and wide inside and the middle cushion layer, so that rainwater can efficiently enter the water seepage hidden pipe from the water seepage holes of the water seepage hidden pipe.

(6) According to the invention, the first lower water pipe in a right angle and the third lower water pipe which is vertically arranged are arranged, so that when the rainfall is larger, rainwater quickly enters the water collecting well through the third vertical lower water pipe and generates a negative pressure effect on the rainwater in the first water collecting cavity through the first lower water pipe in the right angle, and the water collecting speed of the first water collecting cavity is improved.

Drawings

FIG. 1 is a schematic perspective sectional view of the present invention from a left side view;

FIG. 2 is a schematic perspective cross-sectional view of the right side view of the present invention;

FIG. 3 is a schematic perspective cross-sectional view of the front side view of the present invention;

FIG. 4 is an enlarged view taken at A in FIG. 3;

FIG. 5 is a schematic view showing an assembled structure of a permeation closed conduit according to the present invention;

FIG. 6 is a schematic internal perspective cross-sectional view of the present invention;

FIG. 7 is an enlarged view at B in FIG. 6;

FIG. 8 is a schematic perspective view of a suspension valve assembly according to the present invention;

FIG. 9 is a schematic view of the assembly structure of the kerb strips and the water collecting well according to the present invention;

fig. 10 is an enlarged schematic view of the structure at C in fig. 6.

The reference numbers in the figures illustrate:

1. a water permeable facing; 2. a permeable base layer; 3. a cushion layer; 4. a middle cushion layer; 5. an anti-permeation layer; 6. tamping a soil layer; 7. natural soil foundation; 8. penetrating a concealed pipe; 801. a water seepage hole; 9. kerb stone strips; 901. a first water collection cavity; 902. a second water collecting cavity; 10. a first downcomer pipe; 11. a water collecting well; 12. a second downcomer; 13. a water distribution pipe; 14. a hemispherical cover; 15. a half ball valve; 16. a connecting rod; 17. a floating ball; 18. an overflow pipe; 19. and a third downcomer.

Detailed Description

The technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention; it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments, and all other embodiments obtained by those skilled in the art without any inventive work are within the scope of the present invention.

In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "outer", "top/bottom", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "disposed," "sleeved/connected," "connected," and the like are to be construed broadly, e.g., "connected," which may be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Referring to fig. 1 to 10, in an embodiment of the present invention, a semi-permeable waterway drainage structure includes a natural soil foundation 7, and a rammed soil layer 6, an impermeable layer 5, a cushion layer 3, a permeable base layer 2, and a permeable surface layer 1, which are sequentially constructed from the natural soil foundation 7 from bottom to top, and includes:

the water collection assembly comprises a penetration concealed pipe 8 which is arranged at the joint surface of the permeable base layer 2 and the cushion layer 3 and respectively extends to the permeable base layer 2 and the cushion layer 3, a curb 9 which is buried in the soil at the roadside, wherein the curb 9 is provided with a first water collection cavity 901 which is communicated with the penetration concealed pipe 8, and a water collection well 11 which is buried in the soil, is arranged below the curb 9 and is communicated with the first water collection cavity 901 through a pipeline;

the water distribution assembly comprises a water distribution pipe 13 embedded in the natural soil foundation 7 and a second sewer pipe 12 communicated with the water distribution pipe 13 and the water collection well 11; a water seepage amount adjusting assembly is arranged in the water collecting well 11;

the water seepage amount adjusting assembly comprises a suspension valve assembly arranged at the communication position of the second sewer pipe 12 and the water collecting well 11 and an overflow pipe 18 arranged at one side of the water collecting well 11 far away from the suspension valve assembly, wherein the suspension valve assembly comprises a semispherical cover 14 arranged at the communication position of the second sewer pipe 12 and the water collecting well 11, a semispherical valve 15 embedded in the semispherical cover 14 and hinged with the semispherical cover 14, a connecting rod 16 fixedly connected with the front end of the semispherical valve 15 and a floating ball 17 fixedly connected with one end of the connecting rod 16 far away from the semispherical valve 15;

the overflow pipe 18 is a siphon pipe, the water outlet of the overflow pipe 18 positioned at the inner side of the water collecting well 11 is as high as the hemispherical valve 15, and the water outlet at the outer end of the overflow pipe 18 is lower than the lower end surface of the water collecting well 11.

Specifically, when rainwater enters the upper part of the base layer 3 through the water permeable surface layer 1 and the water permeable base layer 2, the base layer 3 intercepts the rainwater, the intercepted rainwater enters the first water collecting cavity 901 of the curb stone strip 9 through the penetration concealed pipe 8 and then enters the water collecting well 11 through a pipeline for centralized collection, and the collected rainwater enters the water distribution pipe 13 through the second sewer pipe 12 and slowly penetrates into the natural soil foundation 7;

in order to avoid that the water in the water collecting well 11 is too large in rainstorm weather, so that the water pressure entering the water distributing pipe 13 is too large to impact the natural soil foundation 7, when the water in the water collecting well 11 is large, rainwater is accumulated in the water collecting well 11, along with the lifting of a liquid level, the floating ball 17 drives the hemispherical valve 15 to rotate in the hemispherical cover 14 through the connecting rod 16, a channel from the water collecting well 11 to the second sewer pipe 12 is further sealed, meanwhile, the rainwater is discharged through the overflow pipe 18, the rainwater is guaranteed to continuously seep downwards, the surface water accumulation of the permeable surface layer 1 is avoided, meanwhile, the infiltration of the rainwater on the cushion layer 3 is reduced, the structural stability and the service life of the cushion layer 3 are guaranteed, and the safety of the roadbed is further improved.

It should be noted that the outlet of the overflow pipe 18 is connected to a municipal pipeline or a municipal water system, so as to ensure that the rainwater can be timely separated from the road.

In the embodiment, the middle cushion layer 4 for isolating the water permeable base layer 2 and the cushion layer 3 is filled between the water permeable concealed pipes 8.

Specifically, through pack between infiltration hidden pipe 8 and between basic unit 2 and the bed course 3 of permeating water and have middle bed course 4, reduce the rainwater and be detained between basic unit 2 and the bed course 3 of permeating water, reduce the area of contact and the contact time of rainwater and bed course 3, improve drainage efficiency.

In an embodiment, the penetrating hidden pipe 8 is a circular pipe horizontally arranged along the width direction of the road, the upper part of the penetrating hidden pipe 8 is provided with water seepage holes 801 uniformly distributed, and the water seepage holes 801 are tapered through holes with a narrow outer part and a wide inner part.

Specifically, rainwater can penetrate the hidden pipe 8 more easily through the water seepage holes 801 with narrow outer parts and wide inner parts to be collected quickly.

In the embodiment, semicircular strip-shaped grooves are formed in the contact surfaces of the permeable base layer 2 and the cushion layer 3.

Concrete, all set up through being located the contact surface of the two at basic unit 2 and the bed course 3 of permeating water and be semicircular bar groove, conveniently hold infiltration hidden pipe 8, simultaneously, the upper end face contact position of terminal surface and bed course 3 is dome structure under the basic unit 2 of permeating water, improves the stability of support, improves the intensity of contact surface.

In the embodiment, the hemispherical cover 14 is a hollow hemispherical cover, the hemispherical valve 15 is in a hemispherical structure, and the hemispherical valve 15 is hinged to the inner wall of the hemispherical cover 14 through a cross-over shaft.

In particular, the hemisphere valve 15 is convenient to rotate and reset under the driving of the connecting rod 16 and the floating ball 17.

In this embodiment, the water distribution pipe 13 is a straight cylindrical circular pipe buried in the natural soil foundation, and the outer wall of the lower circumference of the water distribution pipe 13 is provided with water distribution holes penetrating through the water distribution pipe 13.

Specifically, rainwater uniformly enters the natural soil foundation 7 through the water distribution holes 13 on the lower end surface of the water distribution pipe 13, so that water concentration is avoided, the permeation speed is ensured, and the roadbed is prevented from being damaged.

In another embodiment of the present invention, the semi-permeable waterway drainage structure further comprises a second drainage structure, which comprises a second water collection chamber 902 opened at the upper part of the kerb stone strip 9 and opened higher than the water permeating surface layer 1, and a third sewer pipe 19 communicating the second water collection chamber 902 with the first sewer pipe 10.

Specifically, through being equipped with second water collecting cavity 902, carry out timely collection to the catchment on the surface course 1 that permeates water, avoid surface gathered water, one-level drainage structures more improves efficiency, guarantees drainage speed.

In this embodiment, the first water collecting cavity 901 and the second water collecting cavity 902 are both strip-shaped grooves, and the filter screen is nested in the opening of the second water collecting cavity 902 facing the road surface.

In particular, road surface garbage is prevented from entering the second water collecting cavity 902.

In this embodiment, the third downcomers 19 are vertically arranged strip-shaped pipes, the first water collecting chamber 901 is communicated with the third downcomers 19 through the second downcomers 10 which are at a right angle, and the second downcomers 10 are vertically communicated with the third downcomers 19.

Specifically, through the vertically arranged third downcomer 19 and the right-angled second downcomer 10, when the water volume is large, a first part of the water flows through the second water collecting cavity 902 and rapidly falls through the third downcomer 19, and a second part of the water flows into the first water collecting cavity 901 through the water permeable surface layer 1, the water permeable base layer 2 and the penetration concealed pipe 8, at this time, the flow rate of the second part of the water flows through the water permeable surface layer 1, the water permeable base layer 2 and the penetration concealed pipe 8 is small, the first part of the water flows and the second part of the water flows are at the contact position of the third downcomer 19 and the first downcomer 10, the flow rate of the first part of the water flows is larger than that of the second part of the water flows, that is, the internal pressure of the third downcomer 19 is smaller than the internal pressure of the first downcomer 10, the third downcomer 19 forms negative pressure suction on the water flows of the first downcomer 10, the drainage speed of the first downcomer 10 is increased, and meanwhile, the rainwater in the penetration concealed pipe 8 is sucked by the first downcomer 10, so that the infiltration speed in the negative pressure of the water layers 1 and the water layers 2 is increased, and the drainage speed of the pavement is increased.

In another embodiment of the present invention, the construction process of the semi-permeable waterway drainage structure comprises the following steps:

excavating a strip-shaped ditch by adopting excavating equipment, and embedding a water distribution pipe 13 in a natural soil foundation 7 by using a pipe laying machine;

backfilling the excavated strip-shaped ditch and intermittently tamping the excavated strip-shaped ditch by using tamping equipment and a road roller to form a tamping soil layer 6;

thirdly, pouring dense-graded cement stabilizing gravel to form an impermeable layer 5;

pouring the cushion layer 3 by using the asphalt sand, and reserving strip-shaped grooves which are distributed at equal intervals when the cushion layer 3 is poured;

placing the penetration concealed pipe 8 in the strip-shaped groove of the cushion layer 3, and then pouring the middle cushion layer 4, wherein the height of the middle cushion layer 4 is smaller than the radius of the penetration concealed pipe 8; finally, pouring the permeable base layer 2 by using graded broken stones;

step six, carrying out a permeable surface layer 1 by adopting fine grain type asphalt concrete;

seventhly, burying curb stone strips 9 and a water collecting well 11 at the side edge of the pavement, and communicating a first downcomer 10, a second downcomer 12 and a third downcomer 19.

Specifically, through the steps, the construction difficulty is small, and the construction procedure is standard.

The foregoing is only a preferred embodiment of the present invention; the scope of the invention is not limited thereto. Any person skilled in the art should be able to cover the technical scope of the present invention by equivalent or modified solutions and modifications within the technical scope of the present invention.

Claims (10)

1. The utility model provides a semi-permeable waterway drainage structure, includes natural soil base (7) and tamp soil layer (6), prevention of seepage permeable bed (5), bed course (3), basic unit (2) and the surface course (1) of permeating water of following the construction from bottom to top in proper order from natural soil base (7), its characterized in that includes:

the water distribution system comprises a water collection assembly and a water distribution assembly, wherein the water collection assembly comprises a permeation concealed pipe (8) which is arranged at the joint surface of a permeable base layer (2) and a cushion layer (3) and respectively extends to the permeable base layer (2) and the cushion layer (3), and a curb stone strip (9) buried in roadside soil, wherein the curb stone strip (9) is provided with a first water collection cavity (901) communicated with the permeation concealed pipe (8), and a water collection well (11) buried in the soil, arranged below the curb stone strip (9) and communicated with the first water collection cavity (901) through a pipeline;

the water distribution assembly comprises a water distribution pipe (13) buried in the natural soil foundation (7) and a second sewer pipe (12) communicated with the water distribution pipe (13) and the water collection well (11); a water seepage amount adjusting component is arranged in the water collecting well (11);

the water seepage amount adjusting assembly comprises a suspension valve assembly arranged at the communication position of a second sewer pipe (12) and the water collecting well (11) and an overflow pipe (18) arranged at one side of the water collecting well (11) far away from the suspension valve assembly, the suspension valve assembly comprises a hemispherical cover (14) arranged at the communication position of the second sewer pipe (12) and the water collecting well (11), a hemispherical valve (15) embedded in the hemispherical cover (14) and hinged with the hemispherical cover (14), a connecting rod (16) fixedly connected with the front end of the hemispherical valve (15), and a floating ball (17) fixedly connected with one end of the connecting rod (16) far away from the hemispherical valve (15);

the overflow pipe (18) is a siphon pipe, the water outlet of the overflow pipe (18) positioned on the inner side of the water collecting well (11) is as high as the hemispherical valve (15), and the water outlet of the outer end of the overflow pipe (18) is lower than the lower end surface of the water collecting well (11).

2. A semi-permeable waterway drainage structure according to claim 1, wherein: the water seepage device is characterized by further comprising a second drainage structure, wherein the second drainage structure comprises a second water collecting cavity (902) and a third sewer pipe (19), the second water collecting cavity (902) is formed in the upper portion of the curb stone strip (9) and the opening of the second water collecting cavity is higher than the water seepage surface layer (1), and the third sewer pipe (19) is used for communicating the second water collecting cavity (902) with the first sewer pipe (10).

3. A semi-permeable waterway drainage structure according to claim 1, wherein: and a middle cushion layer (4) for isolating the permeable base layer (2) and the cushion layer (3) is filled between the permeable concealed pipes (8).

4. The semi-permeable waterway drainage structure of claim 1, wherein: the infiltration hidden pipe (8) is the pipe that sets up along road width direction level, evenly distributed's infiltration hole (801) is seted up on infiltration hidden pipe (8) upper portion, infiltration hole (801) are outer narrow wide toper through-hole in.

5. A semi-permeable waterway drainage structure according to claim 1, wherein: the permeable base layer (2) and the cushion layer (3) are both provided with semicircular strip-shaped grooves on the contact surface.

6. A semi-permeable waterway drainage structure according to claim 1, wherein: the hemispherical cover (14) is a hollow hemispherical cover, the hemispherical valve (15) is of a hemispherical structure, and the hemispherical valve (15) is hinged to the inner wall of the hemispherical cover (14) through a cross shaft.

7. A semi-permeable waterway drainage structure according to claim 2, wherein: the first water collecting cavity (901) and the second water collecting cavity (902) are both strip-shaped grooves, and filter screens are embedded in openings, facing the road surface, of the second water collecting cavity (902).

8. A semi-permeable waterway drainage structure according to claim 2, wherein: the third downcomer (19) is a vertically arranged strip-shaped pipe, the first water collecting cavity (901) is communicated with the third downcomer (19) through a second downcomer (10) which is at a right angle, and the second downcomer (10) is vertically communicated with the third downcomer (19).

9. A semi-permeable waterway drainage structure according to claim 1, wherein: the water distribution pipe (13) is a straight cylindrical round pipe buried in the natural soil foundation, and the outer wall of the circumference of the lower part of the water distribution pipe (13) is provided with water distribution holes penetrating through the water distribution pipe (13).

10. A semi-permeable waterway discharge structure according to claims 1-9, wherein: the construction process of the semi-permeable waterway surface drainage structure comprises the following steps:

excavating a strip-shaped ditch by adopting excavating equipment, and burying a water distribution pipe (13) in a natural soil foundation (7) by using a pipe laying machine;

backfilling the excavated strip-shaped ditch and intermittently tamping the ditch by using tamping equipment and a road roller to form a tamping soil layer (6);

thirdly, pouring dense-graded cement stabilized gravel to form an impermeable layer (5);

pouring the cushion layer (3) by adopting the asphalt sand, and reserving strip-shaped grooves which are distributed at equal intervals when the cushion layer (3) is poured;

placing the penetration concealed pipe (8) in the strip-shaped groove of the cushion layer (3), and then pouring a middle cushion layer (4), wherein the height of the middle cushion layer (4) is smaller than the radius of the penetration concealed pipe (8); finally, pouring the permeable base layer (2) by using graded broken stones;

step six, carrying out a permeable surface layer (1) by adopting fine-grain asphalt concrete;

seventhly, curb stone strips (9) and a water collection well (11) are buried at the side edge of the pavement, and the first sewer pipe (10), the second sewer pipe (12) and the third sewer pipe (19) are communicated.

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