The application discloses a
sponge structure and method for expanding sidewalk
tree root growth space, and the
sponge structure comprises a
permeation layer, a soil improvement layer, a
water storage adjusting mechanism and an
evaporation reduction structure, the soil improvement layer is used for filling original soil excavated on a sidewalk, the soil improvement layer is made by mixing gravel, waste wood and planting soil, and the
sponge structure construction method comprises the steps of prefabricating a
cement groove, pre-burying a
water pipe, adjusting soil, preventing
evaporation and laying the
permeation layer. The soil is improved, the soil
nutrition is improved, the soil is spongy, the
water retention and storage performance of the soil is improved, the underground
root growth space structure of the sidewalk tree is adjusted, the sidewalk tree and urban green land are connected, the sidewalk tree is really integrated into the green land, the
urban heat island and waterlogging problems are solved, urban rainwater is utilized, the sidewalk tree grows healthily, and the ecological benefits of the tree are increased, and finally, the sponge city and the organicization of hard
urban space are achieved.