The invention discloses a tree
pool device with rainwater infiltration, storage and purification functions.According to the tree
pool device, a pretreatment water tank (8) located below a rainwater perforated strainer (9) at the edge of a locomotive pavement and a collecting water tank (4) located below a
pedestrian pavement are installed in a substrate layer (15), overflow holes (12) communicated with the substrate layer are formed in the upper portion of the pretreatment water tank (8), slow infiltration holes (14) are formed in the lower portion of the pretreatment water tank (8), and the top of the pretreatment water tank (8) is further provided with an overflow
pipe (10) communicated with a municipal rainwater
pipe (18); the bottom of the collecting water tank (4) is communicated with a perforated
pipe (3), and a drainage pipe (6) is installed on the side wall of the collecting water tank (4) and communicated with the municipal rainwater pipe (18) laid in an original soil layer (17).The tree
pool device with the rainwater infiltration, storage and purification functions has the advantages that the water infiltration and
water storage capacities of a tree pool are enhanced, the function of drainage after purification is achieved, the runoff
peak value is delayed and reduced, the
runoff volume is reduced, and the requirements of
vegetation maintenance and subsequent rainwater reuse are met.