CN111501956A

CN111501956A - Sponge type grass planting ditch based on limited space transformation and transformation method thereof

Info

Publication number: CN111501956A
Application number: CN202010244164.4A
Authority: CN
Inventors: 张群; 任广欣; 隋欣壮; 马鹏川; 都林
Original assignee: China Construction Eighth Engineering Division Co Ltd
Current assignee: China Construction Eighth Engineering Division Co Ltd
Priority date: 2020-03-31
Filing date: 2020-03-31
Publication date: 2020-08-07

Abstract

The invention discloses a sponge-type grass planting ditch based on limited space reconstruction and a reconstruction method thereof, wherein the sponge-type grass planting ditch comprises a runoff water inlet, an energy dissipation desilting area, a shallow plant ditch and a green belt street tree which are sequentially arranged, the runoff water inlet is formed by two adjacent curb stones lying down in the middle, the energy dissipation desilting area is connected with the runoff water inlet and the shallow plant ditch, and the shallow plant ditch and the green belt street tree are mutually isolated by rows of ecological anticorrosion wood piles. The invention is based on the sponge grass planting ditch transformed in the limited space, can effectively retain rainwater in the limited space by transforming the original green belt, and promotes the penetration of soil. Meanwhile, the flow speed of rainwater can be slowed down, water and soil are kept, and urban runoff flow is reduced. Meanwhile, the grass planting ditch plays a good role in removing and transferring pollutants, and a good landscape effect can be created due to greening engineering construction.

Description

Sponge type grass planting ditch based on limited space transformation and transformation method thereof

Technical Field

The invention relates to the technical field of sponge cities, in particular to a sponge type grass planting ditch based on limited space transformation and a transformation method thereof.

Background

The grass planting ditch technology starts in the 80 th 20 th century, is mainly used for reducing and preventing pollution of pollutants to water bodies, is widely applied to many developed countries at present, and is also developed in recent years in China to have low influence on the construction of rainwater development systems. The traditional grass planting ditch has certain requirements on water storage depth, the requirement of a side slope needs to be less than 1:3, and the requirements cannot be met in limited and narrow terrains.

Disclosure of Invention

Aiming at the problems that the traditional rainwater treatment method is adopted in the existing city, the rainwater resource is wasted and polluted, and the traditional rainwater guiding and purifying means wastes time and labor, the grass planting ditch which is combined with the sponge city construction idea and can be reformed in the limited space of the original green belt and the like and the reforming method thereof are provided, and the grass planting ditch has the advantages of weakening the urban runoff load, purifying the rainwater, conserving the underground water source, protecting and improving the urban ecological environment, namely achieving natural accumulation. Natural osmosis and natural purification.

The technical scheme adopted by the invention is as follows: the utility model provides a sponge type grass planting ditch based on restricted space transformation, its runoff water inlet, energy dissipation desilting area, shallow vegetality irrigation canals and ditches and greenbelt footpath tree that sets gradually, the runoff water inlet is crouched down by two adjacent curb middles and is constituted, energy dissipation desilting area connect the runoff water inlet with the shallow vegetality irrigation canals and ditches, the shallow vegetality irrigation canals and ditches with greenbelt footpath tree adopts ecological anticorrosive stake mutual isolation in rows.

The sponge type grass planting ditch based on limited space reconstruction is further improved in that the runoff water inlet is connected with a road and the energy dissipation and sand sinking area, a plurality of curb stones are arranged at intervals along the road, a strip-shaped concrete backrest is arranged on the backrest side of the curb stones except the curb stones forming the runoff water inlet, and the overflow of the road where the curb stones are located is blocked.

The invention further improves the sponge type grass planting ditch based on limited space reconstruction, and the strip-shaped concrete backrest penetrates into a road and is lower than the curb in height.

The invention further improves the sponge grass planting ditch based on limited space reconstruction, wherein the top of the energy dissipation desilting area is paved with cobbles, and gaps are bonded by fine aggregate concrete.

The sponge type grass planting ditch based on limited space transformation is further improved in that a pervious soil filter layer is adopted at the ditch bottom of the shallow plant ditch, aquatic plants are planted at the top of the shallow plant ditch, a side slope is formed by planting soil and is set up, the slope gradient of the side slope is not more than 1:3, and the longitudinal slope is not more than 4%.

The invention further improves the sponge type grass planting ditch based on limited space reconstruction, the section form of the shallow plant ditch is an inverted trapezoid, and the water storage depth is not less than 20 cm.

The sponge type grass planting ditch based on limited space transformation is further improved in that the ecological anticorrosion wood pile is prepared by adopting round wood piles for anticorrosion treatment.

The invention further improves the sponge type grass planting ditch based on limited space transformation, wherein the diameter of the ecological anticorrosion wood pile is 10-15 cm, and the gap is 2-3 mm.

The invention further improves the sponge type grass planting ditch based on limited space reconstruction, and the exposed height of the ecological anticorrosion wood pile is 40-50 cm.

A method for reconstructing a sponge type grass planting ditch based on a limited space comprises a runoff water inlet, an energy dissipation desilting area, a shallow plant ditch and a green belt street tree which are sequentially arranged, wherein the runoff water inlet is formed by two adjacent border stones lying down in the middle, the energy dissipation desilting area is connected with the runoff water inlet and the shallow plant ditch, and the reconstruction method comprises the following steps: arranging ecological anti-corrosion wood piles in rows between the shallow plant ditches and the green belt street trees, and isolating the shallow plant ditches and the green belt street trees from soil.

The invention is based on the design of the sponge type grass planting ditch reconstructed by the limited space, increases the water storage depth of the grass planting ditch by constructing a new bar-shaped concrete foundation, and effectively reduces the floor area of the street tree in the limited space by arranging the ecological anti-corrosion wooden piles to isolate the original street tree from the grass planting ditch, thereby increasing the effective area of the grass planting ditch in the limited space. Collect unnecessary rainwater resource to a great extent during the rainstorm and reduced traditional rainwater processing mode and polluted the rainwater, and the debris manual work that filters off can regularly clear up, and labour saving and time saving has also reached the effect that the rainwater purified and retrieved when practicing thrift artifical and mechanical cost.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.

Fig. 1 is a plan view of a preferred embodiment of a sponge type grass planting ditch based on the transformation of the limited space of the original green belt according to the present invention.

FIG. 2 is a cross-sectional view of the grass planting trench of FIG. 1.

Figure 3 is a longitudinal section of the energy dissipating sediment zone of figure 1.

Detailed Description

The embodiments of the present invention are described below with reference to specific embodiments, and other advantages and effects of the present invention will be easily understood by those skilled in the art from the disclosure of the present specification. The invention is capable of other and different embodiments and of being practiced or of being carried out in various ways, and its several details are capable of modification in various respects, all without departing from the spirit and scope of the present invention.

The invention relates to a sponge type grass planting ditch design based on the original greenbelt limited space transformation, which realizes the functions of conveying runoff rainwater, collecting and purifying the rainwater by utilizing the comprehensive functions of physics, aquatic plants, microorganisms and the like during the re-layout transformation of the limited space, is an efficient runoff conduction facility and belongs to the technical field of sponge cities.

The invention is described in further detail below with reference to the figures and specific examples.

Referring to fig. 1 to 3, the embodiment of the invention provides a sponge type grass planting ditch based on limited space transformation, and the sponge type grass planting ditch based on limited space transformation can effectively retain rainwater and promote soil infiltration by transforming an original green belt in a limited space. Meanwhile, the flow speed of rainwater can be slowed down, water and soil are kept, and urban runoff flow is reduced. Meanwhile, the grass planting ditch plays a good role in removing and transferring pollutants, and a good landscape effect can be created due to greening engineering construction. The structure of the ecological anti-corrosion tree comprises a runoff water inlet 1, an energy dissipation and sand sinking area 2, a shallow vegetal ditch 3, a strip-shaped concrete backrest 4 and an ecological anti-corrosion wooden pile 5.

The runoff water inlet 1 is the entry of grass planting ditch, by the other two piece adjacent curb middle of road crouch down and constitute, the runoff water inlet 1 is connected the road and is fallen husky district 2 with the energy dissipation, and the inlet cross-section is the structure of falling the trapezium for collect road both sides rainwater get into in the grass planting ditch. The runoff water inlet 1 is arranged at an average position of every 20 meters along the edge of a road and is formed by splicing 2 pieces of granite curbs with openings.

The energy dissipation desilting area 2 is formed by paving local river pebbles and is used for dissipating runoff rainwater flowing into the grass planting ditch and filtering large-particle pollutants in the rainwater. The top of the energy dissipation sand settling area is paved by natural stones, the paving width is larger than the width of the runoff water inlet, the diameter size is phi 500mm-1500mm, and gaps of the natural stones are bonded by fine stone concrete (added with a permeation resistant agent).

Shallow vegetal irrigation canals and ditches 3 adopt a soil filter layer with better water permeability at the bottom of the canal, aquatic plants with waterlogging tolerance and developed root systems are planted at the top of the canal, runoff rainwater is adsorbed and precipitated, and water purification is accelerated. The section form of the shallow plant ditch is trapezoidal, the effective water storage depth meets 20cm, the surface of the shallow plant ditch adopts improved soil, and the thickness of the improved soil is 500 mm. The shallow plant ditch has a concave ditch with water storage capacity and permeability of a certain volume, the height of the bottom of the concave ditch is slightly lower than the elevation of a road, the side slope of the ditch is formed by planting soil and making slope, the slope of the side slope is not more than 1:3, the longitudinal slope is not more than 4%, the top of the shallow plant ditch is covered with planted aquatic plants, and the elevation of the top of the shallow plant ditch is lower than the elevation of the road by 10cm-20 cm.

Bar concrete back 4 builds by laying bricks or stones on former curb back basis and forms, aim at is in the confined space, increase the retaining ability in grass planting ditch, as shown in figure 1 and figure 2, be provided with many places curb along the road interval, set up bar concrete back 4 in the back side of curb 7 except the curb that constitutes runoff water inlet 1, and bar concrete back 4 on each curb links into an integrated entity, break off in runoff water inlet 1 department, can be used to the road overflow of shutoff place. The width of the section of the strip-shaped concrete backrest 4 is 5cm, and the height of the strip-shaped concrete backrest is 5cm-10cm lower than that of the kerbstone. The C15 concrete is adopted to the bar concrete back intensity, the bottom stretches into the road surface below, the water seepage of the soil body below the road surface can be cut off, the C15 concrete is adopted to the bar concrete back, the structure is compact, the water flow between the road and the grass planting ditch can be blocked, and the anti-overflow and anti-seepage effects are achieved. As shown in fig. 3, a strip-shaped concrete backrest 4 may be disposed on the back side of the curb forming the runoff water inlet 1, but it should be noted that the exposed height of the strip-shaped concrete backrest 4 is not higher than the height of the runoff water inlet 1, so as to avoid blocking the water inflow.

The ecological anticorrosion wood pile 5 adopts a round wood pile for anticorrosion treatment and is arranged between the green belt street tree 6 and the shallow plant ditch 3. The green belt street tree 6 is arranged along the shallow plant ditch 3 and the edge of the green belt, the diameter of the ecological anticorrosion wood pile 5 is 10cm-15cm, the gap between adjacent wood piles is 2mm-3mm, the ecological anticorrosion wood pile is formed by processing raw wood by adopting an insoluble aqueous preservative, and the exposed height of the ecological anticorrosion wood pile is 40cm-50 cm. As shown in fig. 1 and 2, a plurality of ecological anticorrosion wood piles 5 are arranged side by side along the edge of the shallow plant ditch 3 to form an isolation zone, and the grass planting ditch and the green belt street tree 6 on two sides are isolated, so that the covering soil of the green belt street tree 6 can be prevented from extending to the inside of the grass planting ditch in the horizontal direction and occupying the area of the grass planting ditch. Through setting up ecological anticorrosive stake median, keep apart the earthing of greenbelt street tree 6 outside the grass planting ditch, not only can reduce the earthing area of greenbelt street tree 6 in the horizontal direction, increase the surface area in the grass planting ditch of restricted space, but also can increase the earthing area of greenbelt street tree 6 in the vertical direction, be favorable to greenbelt street tree 6's growth.

According to the invention, based on the sponge grass planting ditch modified by the limited space of the original green belt, the runoff water inlet collects road rainwater, the large-particle pollutants can be precipitated and the flow velocity of the water flow can be reduced through the pebble layer in the energy dissipation desilting area, the rainwater after energy dissipation enters the shallow plant ditch, the aquatic plants are planted in the ditch, and the root system of the plant can absorb the pollutants dissolved in the rainwater and small particles in the rainwater. The effective water storage depth of the ditch can be increased in the limited space by building the bar-shaped concrete foundation, the ecological anti-corrosion wood piles are used for isolating the street trees and the grass planting ditch, the water and soil loss of the slope protection and the rainfall weather slope reduction can be strengthened, the rainwater on the side of the street can be collected, and the water in the ditch is exchanged through the wood pile gaps.

It should be noted that the structures, ratios, sizes, and the like shown in the drawings attached to the present specification are only used for matching the disclosure of the present specification, so as to be understood and read by those skilled in the art, and are not used to limit the conditions of the present invention, so that the present invention has no technical essence, and any structural modification, ratio relationship change, or size adjustment should still fall within the scope of the present invention without affecting the efficacy and the achievable purpose of the present invention. In addition, the terms "upper", "lower", "left", "right", "middle" and "one" used in the present specification are for clarity of description, and are not intended to limit the scope of the present invention, and the relative relationship between the terms and the terms is not to be construed as a scope of the present invention.

Although the present invention has been described with reference to a preferred embodiment, it should be understood that various changes, substitutions and alterations can be made herein without departing from the spirit and scope of the invention as defined by the appended claims.

Claims

1. The utility model provides a sponge type grass planting ditch based on limited space transformation which characterized in that: the ecological anti-corrosion drainage system comprises a runoff water inlet, an energy dissipation sand-settling area, a shallow plant ditch and green belt street trees which are sequentially arranged, wherein the runoff water inlet is formed by two adjacent border stones lying down, the energy dissipation sand-settling area is connected with the runoff water inlet and the shallow plant ditch, and the shallow plant ditch and the green belt street trees are mutually isolated by rows of ecological anti-corrosion wood piles.

2. The sponge-type grass planting trench based on confined space modification of claim 1, wherein: the runoff water inlet is connected with a road and the energy dissipation desilting area, a plurality of kerbs are arranged at intervals along the road, strip-shaped concrete backrests are arranged on the backrests of the kerbs except the kerbs forming the runoff water inlet, and the road at the position of the blockage overflows.

3. The sponge-type grass planting trench based on confined space modification of claim 2, wherein: the strip-shaped concrete backrest extends into the road and is lower than the kerb in height.

4. The sponge-type grass planting trench based on confined space modification of claim 1, wherein: the top of the energy dissipation desilting area is paved with cobbles, and the gaps are bonded by fine aggregate concrete.

5. The sponge-type grass planting trench based on confined space modification of claim 1, wherein: the bottom of the shallow plant ditch adopts a permeable soil filter layer, aquatic plants are planted at the top of the shallow plant ditch, the side slope is formed by planting soil and placing slope, the slope gradient of the side slope is not more than 1:3, and the longitudinal slope is not more than 4%.

6. The sponge-type grass planting trench based on confined space modification of claim 1, wherein: the section form of the shallow plant ditch is an inverted trapezoid, and the water storage depth is not less than 20 cm.

7. The sponge-type grass planting trench based on confined space modification of claim 1, wherein: the ecological anticorrosion wood pile is prepared by adopting a round wood pile for anticorrosion treatment.

8. The sponge-type grass planting trench based on confined space modification of claim 1, wherein: the diameter of the ecological anticorrosion wood pile is 10cm-15cm, and the gap is 2mm-3 mm.

9. The sponge-type grass planting trench based on confined space modification of claim 1, wherein: the exposed height of the ecological anticorrosion wood pile is 40-50 cm.

10. A method for reconstructing a sponge type grass planting ditch based on a limited space is characterized by comprising a runoff water inlet, an energy dissipation desilting area, a shallow plant ditch and a green belt street tree which are sequentially arranged, wherein the runoff water inlet is formed by two adjacent border stones lying down, the energy dissipation desilting area is connected with the runoff water inlet and the shallow plant ditch, and the reconstruction method comprises the following steps: arranging ecological anti-corrosion wood piles in rows between the shallow plant ditches and the green belt street trees, and isolating the shallow plant ditches and the green belt street trees from soil.