Cold-region habitat restoration-based street tree pit structure and manufacturing method

Abstract

The invention relates to a cold-region habitat restoration-based street tree pit structure and a manufacturing method. At present, street tree pits in the city have the problems that the space requirements of the growth of plant roots cannot be met, city rainwater logging cannot be regulated, the habitat supply capacity is weak and the like. The street tree pit structure consists of an ecologicalwater retention area structure and a planting area habitat structure; the ecological water retention area structure consists of an external skeleton and a rainwater storage structure; the exterior ofthe rainwater storage structure is designed to be a concrete wall surface (11); a planting soil layer A (7) is arranged at the middle position in the concrete wall surface; a gravel layer A (8), a crushed-stone cushion A (9) and porous ceramsites (10) are arranged at the bottom part of the planting soil layer in sequence; two sides of the planting soil layer A are provided with a slow permeation membrane (5) and pebble filling (3) respectively; the right side of the slow permeation membrane is provided with a water storage tank; a drainage pipe (6) is installed at the upper part of the water storage tank; and a gutter inlet (2) and a bituminous pavement (1) are installed at the left side of the upper part of the concrete wall surface. The invention is used for the cold-region habitat restoration-based street tree pit structure.

Description

Technical field: [0001] The invention relates to the technical field of urban ecosystems, in particular to a street tree tree pond structure and a manufacturing method based on habitat restoration in cold regions. Background technique: [0002] Street trees can play the role of connecting populations between different habitats. They have a function similar to corridors and have high biodiversity potential. Tree ponds are an important guarantee for the growth of street trees. Using tree ponds for initial rainwater collection can effectively improve the urban ecological environment. Reduce the flood control pressure of the municipal pipeline system. However, there are many problems in the application of tree ponds at this stage. The environment in the tree ponds of street trees is very bad in terms of temperature, moisture, soil ventilation and soil fertility. Not only does it not play the basic role of protecting trees, On the contrary, it is detrimental to the growth of tree...

AI Technical Summary

Problems solved by technology

Most of the current urban tree pools are set up independently, and the size is narrow, and the reserved planting holes are difficult to meet the normal growth needs of the root system ( figure 1 )

The root system cannot extend through the tree pool, and can only be confined to the abnormal growth in the tree pool, making it difficult for the roots of street trees to extend, easy to cause wind fall, generally poor growth, high mortality rate, and frequent replacement is required to ensure the greening of urban roads;

[0006] (2) Poor soil conditions:

[0007] The pavement laying and tree pond construction process lead to a large amount of engineering waste left in the soil, which makes the pH value often neutral to weakly alkaline, which is not conducive to the growth of street trees. The cement and lime in it restrict the activities of soil organisms and reduce the Soil nutrients change the physical and chemical properties of the soil; the soil surface is often compacted by pedestrians and the air permeability of the soil decreases

[0008] (3) Weak drainage and storage capacity:

However, at present, the water storage capacity of most sidewalk tree ponds is relatively poor. First, the length and width of most tree ponds on sidewalks are less than 1.5m, resulting in the waterline of the canopy being mostly located outside the tree ponds, and rainfall cannot directly infiltrate into the soil in the root zone

Second, in order to prevent pedestrians from stepping on it, the edge of the tree pond is mostly a few centimeters above the ground, so that the rainwater on the road cannot return to supplement the irrigation needs of plants, and a large amount of precipitation flows into urban drainage ditches, which cannot be effectively used

At the same time, the drainage capacity of the existing tree ponds is relatively poor. When there is heavy rainfall in summer, a large amount of water accumulated in the tree ponds with brick-concrete structures cannot be discharged in time, causing root rot and soil organism death.

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