CN108867691B

CN108867691B - Rainwater drainage pipe gallery system for grass planting ditch and construction method

Info

Publication number: CN108867691B
Application number: CN201810754013.6A
Authority: CN
Inventors: 娄锋
Original assignee: Shanghai Jiachang Environmental Protection Technology Co ltd
Current assignee: Shanghai Jiachang Environmental Protection Technology Co ltd
Priority date: 2018-07-10
Filing date: 2018-07-10
Publication date: 2020-12-11
Anticipated expiration: 2038-07-10
Also published as: CN108867691A

Abstract

Grass planting ditch rainwater drainage pipe gallery system, including the roadbed stone, the gradation soil layer, geotechnological cloth, the gradation filler, the rainwater grate, double-walled bellows inspection shaft, arch regulation equipment, the prevention of seepage membrane, arrange mud equipment, a plurality of roadbed stone is located grass planting ditch left and right sides upper end respectively, the vertical excavation foundation ditch of grass planting ditch middle part lower extreme, arch regulation equipment vertically installs in the foundation ditch, row mud equipment is installed respectively to the lower extreme and the upper end of every a plurality of meters arch regulation equipment, double-walled bellows inspection shaft, a rainwater grate is installed to the upper end of every double-walled bellows inspection shaft, tamped soil upper end has laid the prevention of seepage membrane in proper order, the gradation filler, the geotechnological cloth has been laid in proper order to the gradation filler upper end, the green plant is planted on the gradation soil layer. The construction method of the grass planting ditch rainwater drainage pipe gallery system comprises the following steps of 1, excavating a foundation pit; 2, constructing the geotechnical material; 3, installing arch storage regulating equipment and paving graded fillers; and 4, constructing a planting layer. The invention can effectively utilize rainwater.

Description

Rainwater drainage pipe gallery system for grass planting ditch and construction method

Technical Field

The invention relates to the technical field of sponge city construction, in particular to a grass planting ditch rainwater drainage pipe gallery system and a construction method.

Background

The sponge city is a new generation of urban rainfall flood management concept, and means that the city has good elasticity in the aspects of adapting to environmental changes, coping with natural disasters caused by rainwater and the like, and can be called as a water elasticity city; international general terms are "low impact development rain system build"; when raining, the water is absorbed, stored, seeped and purified, and the stored water is released and utilized when needed; therefore, the influence of rainfall on urban drainage is effectively reduced, and the purpose of effectively utilizing water resources is achieved. In the existing urban construction, rainwater is mainly utilized when raining, the rainwater directly flows into a sewer pipe gallery through a road surface, the pipe gallery stores the rainwater, and the rainwater in the sewer pipe gallery is utilized when the rainwater storage device is used, so that the purpose of utilizing the rainwater is achieved; the problem is caused, and the rainwater entering the sewer pipe gallery can deteriorate and generate peculiar smell after being not used for a long time; furthermore, the existing technology can not effectively utilize rainwater generated by grass planting ditches in cities (places where machine-non isolation belts or central isolation belts of roads are planted and greened are called as grass planting ditches), and when raining, the rainwater is directly discharged into the roads, so that the rainwater can not be effectively utilized, the mixture of the rainwater and soil pollutes the road surface, water and soil in the grass planting ditches are lost, and then the plants are unstable in rooting and poor in plant growth.

Disclosure of Invention

In order to overcome the defect that an effective method is not available in the prior art and rainwater in the grass planting ditch can be effectively utilized during rainfall, the invention provides the grass planting ditch rainwater drainage pipe gallery system and the construction method, wherein the system and the construction method can effectively utilize the rainwater in the grass planting ditch during rainfall, can simulate the state of underground water as much as possible for the collected rainwater, ensure that the collected rainwater can be stored for a long time and can also keep good water quality, are convenient to maintain and low in cost, and are beneficial to sustainable development of cities.

The technical scheme adopted by the invention for solving the technical problems is as follows:

a grass planting ditch rainwater drainage pipe gallery system is characterized by comprising roadbed stones, graded soil layers, geotextile, graded fillers, rainwater grates, double-wall corrugated pipe inspection wells, arch regulation and storage equipment, impermeable membranes and sludge discharge equipment, wherein the roadbed stones are provided with a plurality of roadbed stones which are respectively positioned at the upper ends of the left side and the right side of a grass planting ditch, each roadbed stone is provided with an opening as a water inlet, a foundation pit is longitudinally excavated at the lower end of the middle part of the grass planting ditch, soil at the lower part of the grass planting ditch is tamped, the arch regulation and storage equipment is longitudinally arranged in the foundation pit, the sludge discharge equipment is arranged at the lower end of the arch regulation and storage equipment every several meters, the double-wall corrugated pipe inspection wells are arranged at the upper ends of the arch regulation and storage equipment every several meters, the rainwater grates are arranged at the upper ends of the tamped soil, the impermeable membranes are paved on the impermeable membranes, the graded fillers are paved between the lower ends of the arch regulation and the graded fillers, the upper end of the graded filling material is paved with geotextile, the upper end of the geotextile is paved with graded soil layer, the two ends of the graded soil layer are distributed obliquely from the outer side to the middle part, green plants are planted on the graded soil layer, the height of the upper end of the double-wall corrugated pipe inspection well is lower than the height of the left end and the right end of the graded soil layer, the height of the upper end of the double-wall corrugated pipe inspection well is higher than the height of the middle part of the graded soil layer, and the length of the arch storage.

Coarse sand, leaf mold and the like are added into the graded soil layer, so that the water permeability is good, and nutrients can be provided for plants.

The geotextile plays a role in rainwater filtration.

The graded filler comprises quartz sand, zeolite, volcanic rock and the like.

The upper end of the rainwater grate is provided with a plurality of openings, so that rainwater can enter the arch-shaped storage regulating equipment from the openings through the double-wall corrugated pipe inspection well when the rainfall is large.

The arch regulation equipment upper portion is semi-circular structure, and the lower part of arch regulation equipment is flat bed formula structure, and the upper portion of arch regulation equipment distributes and has a plurality of trompils, does benefit to outside rainwater and gets into the inside of arch regulation equipment through the trompil, and the upper end of arch regulation equipment and lower extreme middle part have an annular ring at every a plurality of meters, and the graduation is joined in marriage filler thickness and is highly high than arch regulation equipment, and it has the graduation to join in marriage the filler to distribute equally around the arch regulation equipment outside.

The double-wall corrugated pipe inspection well is of a cylindrical structure, the lower end of the double-wall corrugated pipe inspection well is arranged at the upper end of an annular ring in the middle of the upper part of the arch storage regulating equipment, and the double-wall corrugated pipe inspection well and the arch storage regulating equipment are in a sealed state.

The lower end of the sludge discharge device is provided with a bottom, the upper end of the sludge discharge device is arranged at the lower end of the annular ring at the lower middle part of the arched storage device, and a sealing structure is arranged between the upper end of the sludge discharge device and the lower end of the middle part of the arched storage device.

The construction method of the grass planting ditch rainwater drainage pipe gallery system comprises the following steps of 1, excavating a foundation pit, according to the design requirement, after the foundation pit is excavated and cleaned of earthwork, reaching the design elevation, checking whether a longitudinal slope, a transverse slope and side lines meet the design requirement, then finishing the foundation pit, leveling and rolling to be compact, wherein the compaction coefficient reaches more than 95%, and paying attention to underground buried pipelines; 2, construction of the geotechnical material, a, laying sequence: paving the impermeable membrane of the geotechnical material in the foundation pit according to design requirements, wherein b, the paving requirement is as follows: the appearance of the impermeable membrane is checked at any time in the membrane laying process to detect whether the impermeable membrane has defects such as damage, pockmarks, holes and the like, if the holes and the like have defects, the same kind of fresh parent metal is used for repairing, each side of a repaired scar is 10-20cm higher than the damaged part, the laid impermeable membrane of the geotechnical material is naturally loosened and tightly attached to a supporting layer, and the impermeable membrane is not folded and suspended, and c, the impermeable membrane is overlapped on site: d, after the impermeable geomembranes of the geotechnical materials are laid and spliced, reporting supervision and acceptance in time, and immediately carrying out construction of a geotechnical material protective layer after the impermeable geomembranes are qualified; 3, installing arch storage regulating equipment and paving graded fillers, after the impermeable membrane of the geotechnical material is paved, paving the graded fillers above the impermeable membrane, installing the arch storage regulating equipment on the graded filler cushion layer, and arranging mud discharging equipment, a double-wall corrugated pipe inspection well and a rainwater grate every a plurality of meters; and 4, constructing a planting layer (graded soil layer), backfilling the graded soil layer and sealing the geotextile after the arch-shaped regulation and storage equipment is installed, backfilling the graded soil layer after the geotextile is completely sealed, determining the thickness of the graded soil layer according to the type of the plant, and planting the plant after the planting layer is constructed.

The invention has the beneficial effects that: the graded soil layer provides a good growing environment for plants, the healthy growth of the plants is ensured, and in use, when rainfall occurs, because the left part and the right part at the upper end of the graded soil layer of the grass planting ditch are of the inward inclined structures, rainwater entering the grass planting ditch can be gathered together, cannot flow to the road surface to pollute the road surface, cannot cause water and soil loss in the grass planting ditch, and further cannot influence the growth of the plants. When rainwater is small, rainwater enters the geotextile through the graded soil layer, the geotextile filters the rainwater, then the rainwater is filtered again through the graded filler, and enters the arch-shaped regulation and storage equipment through a plurality of openings distributed at the upper part of the arch-shaped regulation and storage equipment; after rainwater enters the arch-shaped regulation and storage equipment, the arch-shaped regulation and storage equipment is provided with a plurality of openings, actually, the rainwater entering the arch-shaped regulation and storage equipment is in an exchange state with the graded filler, and the quartz sand, zeolite and volcanic rock in the graded filler can effectively inhibit the generation of harmful substances in the rainwater and preserve the water, namely the rainwater is similar to the underground water environment after being positioned in the arch-shaped regulation and storage equipment, so that the rainwater is fully ensured not to deteriorate and become odorous after being not used for a long time; when sediment is generated in rainwater in the arched storage device, the generated sediment can be deposited at the bottom in the sludge discharge device, and when the sediment is excessive, managers can conveniently dredge the sediment by dredging and elutriating the device (including the sludge pump) by opening the rainwater grate. The invention beautifies the environment of urban roads, has the advantages of large water storage capacity, low construction cost, convenient maintenance, easy combination with landscape and the like, can effectively absorb and utilize rainwater in grass planting ditches during rainfall, ensures that the road surface is clean and free of accumulated water, fully embodies the characteristics of seepage, stagnation, storage, purification and drainage in sponge urban construction, is not only a drainage channel for rainwater, but also a regulation and storage space for rainwater, has a rainwater purification function, simulates an underground water structure, and ensures that the collected rainwater is not deteriorated; based on the above, the invention has wide application prospect.

Drawings

The invention is further illustrated below with reference to the figures and examples.

FIG. 1 is a schematic view of a longitudinal section structure of a rainwater drainage pipe gallery system of a grass planting ditch according to the present invention;

FIG. 2 is a schematic view of a transverse section structure of a rainwater drainage pipe gallery of a grass planting ditch according to the present invention;

FIG. 3 is a flow chart of a construction method of the grass planting ditch rainwater drainage pipe gallery system.

Detailed Description

As shown in fig. 1 and 2, the grass planting ditch rainwater drainage pipe gallery system comprises roadbed stones 1, graded soil layers 2, geotextiles 3, graded fillers 4, rainwater grates 5, double-wall corrugated pipe inspection wells 6, arch-shaped regulation and storage equipment 7, impermeable membranes 8 and sludge discharge equipment 9, wherein the roadbed stones 1 are provided with a plurality of roadbed stones 1 respectively positioned at the upper ends of the left side and the right side of a grass planting ditch 10, each roadbed stone 1 is provided with an opening as a water inlet, the lower end of the middle part of the grass planting ditch 10 is longitudinally excavated into a foundation pit, the soil at the lower part of the grass planting ditch 10 is tamped, the arch-shaped regulation and storage equipment 7 is longitudinally arranged in the foundation pit, the sludge discharge equipment 9 is arranged at the lower end of the arch-shaped regulation and storage equipment 7 every 30m or so, the double-wall corrugated pipe inspection wells 6 are arranged at the upper ends of the arch-shaped regulation and storage equipment 7 every 30m or so, the rainwater grates 5 are arranged at the upper ends of the, prevention of seepage membrane 8 upper berth is equipped with graded filler 4, prevention of seepage membrane 8 has been laid between 7 lower extremes of arch regulation equipment and the graded filler 4, geotechnological cloth 3 has been laid to graded filler 4 upper end, graded soil layer 2 has been laid to geotechnological cloth 3 upper end, graded soil layer 2 both ends are the tilting by outside to the middle part and distribute, green plant 12 is planted on graded

soil layer

2, 6 upper ends of double-walled bellows inspection shaft highly are lower than graded soil layer 2 left and right sides both ends height, 2 middle part height of graded soil layer, 7 length of arch regulation equipment and the length of grass planting ditch 10 are unanimous.

As shown in figures 1 and 2, the graded soil layer 2 is added with coarse sand, leaf mold and the like, has good water permeability and can provide nutrients for plants. The geotextile 3 plays a role in rainwater filtration. The graded filler 4 includes quartz sand, zeolite, volcanic rock, etc. The upper end of the rainwater grate 5 is provided with a plurality of openings, so that when the rainfall is large, rainwater can enter the arch-shaped storage regulating equipment 7 from the openings through the double-wall corrugated pipe inspection well 6. The upper portion of arch regulation equipment 7 is semi-circular structure, and the lower part of arch regulation equipment 7 is flat bed formula structure, and the upper portion of arch regulation equipment 7 distributes and has a plurality of trompils, does benefit to outside rainwater and gets into the inside of arch regulation equipment 7 through the trompil, and the upper end of arch regulation equipment 7 and lower extreme middle part have an annular circle every a plurality of meters, and the 4 thickness of gradation filler is higher than arch regulation equipment 7 height, and it has gradation filler 4 to distribute equally around the arch regulation equipment 7 outside. The double-wall corrugated pipe inspection well 6 is of a cylindrical structure, the lower end of the double-wall corrugated pipe inspection well 6 is arranged at the upper end of an annular ring in the middle of the upper portion of the arch-shaped storage adjusting device 7, and the space between the double-wall corrugated pipe inspection well 6 and the arch-shaped storage adjusting device 7 is in a sealing state. The lower end of the sludge discharge device 9 is provided with a bottom, the upper end of the sludge discharge device 9 is arranged at the lower end of the annular ring at the lower middle part of the arched storage device 7, and a sealing structure is arranged between the upper end of the sludge discharge device 9 and the lower end of the middle part of the arched storage device 7.

As shown in fig. 3, the construction method of the grass planting ditch rainwater drainage pipe gallery system is as follows, 1), excavating the foundation pit, according to the design requirement, after excavating and cleaning earthwork, excavating the foundation pit to reach the design elevation, checking a longitudinal slope, a transverse slope and side lines, whether the design requirement is met, then finishing the foundation pit, leveling and rolling to be compact, wherein the compaction coefficient reaches more than 95%, and paying attention to underground buried pipelines; 2) the construction of the geotechnical material, a, the laying sequence: paving the geomaterial impermeable membrane 8 in the foundation pit according to design requirements, wherein b, the paving requirement is as follows: the appearance of the impermeable membrane 8 is checked at any time during the membrane laying process to determine whether the impermeable membrane has defects such as damage, pockmarks, holes and the like, if the holes and the like have defects, the same kind of fresh base material is used for repairing, each side of a repaired scar is 10-20cm higher than a damaged part, the laid impermeable membrane 8 made of the geotechnical material is required to be naturally loosened and tightly attached to a supporting layer, and the impermeable membrane is not required to be wrinkled and suspended, and c, the impermeable membrane is overlapped on site: d, after the geotextile impermeable membranes 8 are laid and spliced, reporting supervision and acceptance in time, and immediately performing geotextile material protective layer construction after the geotextile impermeable membranes 8 are qualified; 3) the method comprises the following steps that the arch-shaped regulation and storage equipment 7 is installed and is paved with the graded fillers 4, after the impermeable membrane 8 of the geotechnical material is paved, the graded fillers 4 are paved above the arch-shaped regulation and storage equipment 7, the arch-shaped regulation and storage equipment 7 is installed on a cushion layer of the graded fillers 4, and the mud discharge equipment 9, the double-wall corrugated pipe inspection well 6 and the rainwater grate 5 are arranged at intervals of a plurality of meters; 4) and after the arch storage regulating equipment 7 is installed, backfilling the graded soil layer 2 and sealing the geotextile 3, after the geotextile 3 is completely sealed, beginning to backfill the graded soil layer 2, determining the thickness of the graded soil layer 2 according to the type of the plant, and planting the plant after the construction of the planting layer is finished.

As shown in fig. 1, 2 and 3, the graded soil layer 2 of the present invention provides a good growing environment for plants, so as to ensure the healthy growth of plants, and in use, when rainfall occurs, because the left and right parts of the upper end of the graded soil layer 2 of the grass planting ditch 10 are in an inward-inclined structure, rainwater entering the grass planting ditch 10 will gather together, and will not flow to the road surface to pollute the road surface, and cause soil and water loss in the grass planting ditch 10, thereby affecting the growth of plants. When rainwater is small, rainwater enters the geotextile 3 through the graded soil layer 2, the geotextile 3 filters the rainwater, then the rainwater is filtered again through the graded filler 4, and the rainwater enters the arch-shaped regulation and storage equipment 7 through a plurality of openings distributed at the upper part of the arch-shaped regulation and storage equipment 7, when the rainwater is large, the rainwater in the grass planting ditch 10 can not completely enter the arch-shaped regulation and storage equipment 7 through the graded soil layer 2 and the geotextile 3, at the moment, the excessive rainwater can directly enter the arch-shaped regulation and storage equipment 7 through a plurality of openings at the upper end of the rainwater grate 5, and the rainwater can effectively enter the arch-shaped regulation and storage equipment 7 when the rainwater is too large; after rainwater enters the arch-shaped regulation and storage equipment 7, the arch-shaped regulation and storage equipment 7 is provided with a plurality of openings, actually, the rainwater entering the arch-shaped regulation and storage equipment 7 is in an exchange state with the graded filler 4, and quartz sand, zeolite, volcanic rock and the like in the graded filler 4 can effectively inhibit the generation of harmful substances in the rainwater and preserve the water, namely the rainwater is similar to the underground water environment after being positioned in the arch-shaped regulation and storage equipment 7, so that the rainwater is fully ensured not to deteriorate and become odorous after being used for a long time; when sediment is generated in rainwater in the arched storage device 7, the generated sediment can enter the mud discharging device 9, and when the sediment is too much, managers can conveniently drain the sediment by using the draining device by opening the rainwater grate 5. The invention is suitable for draining water in a wide range of regions; the device is suitable for two sides of a road, a non-mechanical isolation zone and a central isolation zone; the method has more advantages particularly for construction and use in areas with complex underground pipelines and insufficient construction space. The rainwater storage device is a rainwater drainage channel and a rainwater storage space, and meets the requirements of rainwater drainage and rainwater storage. The invention beautifies the environment of urban roads, has the advantages of large water storage capacity, low construction cost, convenient maintenance, easy combination with landscape and the like, can effectively absorb and utilize rainwater in the grass planting ditch during rainfall, ensures that the road surface is clean and has no accumulated water, fully embodies the characteristics of seepage, stagnation, storage, purification and drainage in sponge urban construction, is not only a drainage channel for rainwater, but also a regulation and storage space for rainwater, has a rainwater purification function, simulates an underground water structure, and ensures that the collected rainwater does not go bad. The invention has the characteristics of continuous rainwater treatment, no secondary pollution, flexibility and wide application; the invention is an effective way for reducing urban flood disasters and improving urban environment, can transmit and regulate rainwater, can completely replace a rainwater discharge pipe network, combines the invention with rainwater runoff pollution control, urban flood control and ecological environment improvement, is preferred according to local conditions, and is beneficial to the sustainable development of cities. The invention has low engineering cost and maintenance cost and very obvious investment benefit, and can save a large amount of city tap water along with the formation of a rainwater treatment and utilization system; meanwhile, the utilization of the rainwater can provide support for industry and commerce and tourism industry, and potential economic benefits are very great. All activities of human beings need to depend on the inhabited ecological environment, the ecological system provides a living maintenance system for human beings and provides the most basic material resources required for engaging in various activities. The invention well solves the problem of urban water resource shortage, reduces urban flood disasters, improves urban environment and has remarkable social benefit; the method is based on local conditions and preferred, gives consideration to economic benefits, environmental benefits and social benefits, and has positive and practical significance for the sustainable development of cities. Based on the above, the invention has wide application prospect.

While there have been shown and described what are at present considered the fundamental principles and essential features of the invention and its advantages, it will be apparent to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, but is capable of other specific forms without departing from the spirit or essential characteristics thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.

Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.

Claims

1. A grass planting ditch rainwater drainage pipe gallery system is characterized by comprising roadbed stones, graded soil layers, geotextile, graded fillers, rainwater grates, double-wall corrugated pipe inspection wells, arch regulation and storage equipment, impermeable membranes and sludge discharge equipment, wherein the roadbed stones are provided with a plurality of roadbed stones which are respectively positioned at the upper ends of the left side and the right side of a grass planting ditch, each roadbed stone is provided with an opening as a water inlet, a foundation pit is longitudinally excavated at the lower end of the middle part of the grass planting ditch, soil at the lower part of the grass planting ditch is tamped, the arch regulation and storage equipment is longitudinally arranged in the foundation pit, the sludge discharge equipment is arranged at the lower end of the arch regulation and storage equipment every several meters, the double-wall corrugated pipe inspection wells are arranged at the upper ends of the arch regulation and storage equipment every several meters, the rainwater grates are arranged at the upper ends of the tamped soil, the impermeable membranes are paved on the impermeable membranes, the graded fillers are paved between the lower ends of the arch regulation and the graded fillers, the upper end of the graded filling material is paved with geotextile, the upper end of the geotextile is paved with graded soil layer, the two ends of the graded soil layer are distributed obliquely from the outer side to the middle part, green plants are planted on the graded soil layer, the height of the upper end of the double-wall corrugated pipe inspection well is lower than the height of the left end and the right end of the graded soil layer and higher than the middle part of the graded soil layer, and the length of the arched storage regulating equipment is consistent with that of the grass planting ditch; coarse sand and leaf mold are added in the graded soil layer; the graded filler comprises quartz sand, zeolite and volcanic rock; the upper end of the rainwater grate is provided with a plurality of openings; the upper part of the arched storage regulating equipment is of a semicircular structure, the lower part of the arched storage regulating equipment is of a flat-bottom structure, a plurality of openings are distributed in the upper part of the arched storage regulating equipment, annular rings are arranged in the middle of the upper end and the lower end of the arched storage regulating equipment every a plurality of meters, and the thickness of the graded filler is higher than the height of the arched storage regulating equipment; the double-wall corrugated pipe inspection well is of a cylindrical structure, and the lower end of the double-wall corrugated pipe inspection well is arranged at the upper end of an annular ring in the middle of the upper part of the arched storage regulating equipment; the lower end of the sludge discharge device is provided with a bottom, and the upper end of the sludge discharge device is arranged at the lower end of the annular ring in the lower middle part of the arched storage regulating device; the graded soil layer provides a good growing environment for plants, the healthy growth of the plants is ensured, when rainfall occurs, the left part and the right part of the upper end of the graded soil layer of the grass planting ditch are of an inward inclined structure, rainwater entering the grass planting ditch can be gathered together, and cannot flow to a road surface to pollute the road surface and cause water and soil loss in the grass planting ditch, so that the growth of the plants is influenced; when rainwater is small, rainwater enters the geotextile through the graded soil layer, the geotextile filters the rainwater, then the rainwater is filtered again through the graded filler, and the rainwater enters the arch-shaped regulation and storage equipment through a plurality of openings distributed at the upper part of the arch-shaped regulation and storage equipment; after rainwater enters the arch-shaped regulation and storage equipment, the rainwater entering the arch-shaped regulation and storage equipment is in an exchange state with the graded fillers, and the quartz sand, the zeolite and the volcanic rock in the graded fillers can effectively inhibit the generation of harmful substances in the rainwater, so that the rainwater is preserved, and the rainwater is ensured not to deteriorate and become odorous even if the rainwater is not used for a long time; when excessive sediment is in rainwater in the arched storage device, managers can dredge the sediment by dredging the device by opening the rainwater grate.

2. The grass planting ditch rainwater drainage pipe gallery system according to claim 1, characterized in that the construction method of the grass planting ditch rainwater drainage pipe gallery system is as follows, 1, excavation of a foundation pit, according to the design requirement, after excavation and clearing of earthwork of the foundation pit, the design elevation is reached, a longitudinal slope, a transverse slope and side lines are checked, whether the design requirement is met, then the foundation pit is repaired, leveling and rolling compaction are carried out, the compaction coefficient reaches more than 95%, and underground buried pipelines are paid attention to; 2, construction of the geotechnical material, a, laying sequence: paving the impermeable membrane of the geotechnical material in the foundation pit according to design requirements, wherein b, the paving requirement is as follows: the appearance of the impermeable membrane is inspected at any time in the membrane laying process to determine whether the impermeable membrane is damaged or not, pockmarks and hole defects, if the defects are repaired by the same fresh parent metal, each side of a repaired scar is 10-20cm higher than the damaged part, the laid impermeable membrane made of the geotechnical material is naturally loosened and adhered to a supporting layer, and the impermeable membrane is not folded and suspended, and c, the impermeable membrane is overlapped on site: joints among the anti-seepage films are connected by adopting an overlapping method, the width of joints is not less than 15cm, d, after the anti-seepage films of the geotechnical material are laid and spliced, supervision and acceptance are reported in time, and after the anti-seepage films of the geotechnical material are qualified, construction of a geotechnical material protective layer is immediately carried out; 3, installing arch storage regulating equipment and paving graded fillers, after the impermeable membrane of the geotechnical material is paved, paving the graded fillers above the impermeable membrane, installing the arch storage regulating equipment on the graded filler cushion layer, and arranging mud discharging equipment, a double-wall corrugated pipe inspection well and a rainwater grate every a plurality of meters; and 4, planting layer construction, namely, after the arch-shaped regulation and storage equipment is installed, sealing the geotextile and backfilling the graded soil layer, after the geotextile is completely sealed, backfilling the graded soil layer, wherein the thickness of the graded soil layer is determined according to the variety of the plant, and the plant is planted after the planting layer construction is finished.