Salt-isolated rain garden structure

Patent metadata

Field	Value
Publication number	US-11470787-B2
Application number	US-202016889022-A
Country	US
Kind code	B2
Filing date	Jun 1, 2020
Priority date	Jul 30, 2019
Publication date	Oct 18, 2022
Grant date	Oct 18, 2022

Abstract

The present invention belongs to the technical field of landscape garden engineering, and specifically discloses a salt-isolated rain garden structure. The salt-isolated rain garden structure includes a depression surrounded by side slopes, where a 10 cm thick drainage layer, a 10-30 cm thick filler layer, a 5 cm thick transition layer, a 20-30 cm thick planting layer, a 0.2-0.5 cm thick mulch layer and a 15-20 cm thick ponding layer are stacked in order from the bottom of the depression to up; a salt barrier is disposed between the planting layer and the transition layer and/or between the drainage layer and a saline layer; a vertical overflow pipe and a horizontal drainage pipe are disposed at the bottom of the depression; the overflow pipe and drainage pipe are connected; the salt barrier is filled with river sand, zeolite or ceramsite and is 10-20 cm in thickness.

First claim

What is claimed is:

1. A salt-isolated rain garden structure, comprising a depression surrounded by side slopes, wherein a 10 cm thick drainage layer, a 10-30 cm thick filler layer, a 5 cm thick transition layer, a 20-30 cm thick planting layer, a 0.2-0.5 cm thick mulch layer and a 15-20 cm thick ponding layer are stacked in order from bottom to top of the depression; a salt barrier is disposed between the planting layer and the transition layer; a vertical overflow pipe and a horizontal drainage pipe are disposed at the bottom of the depression; the overflow pipe and the drainage pipe are connected; the salt barrier is filled with river sand, zeolite or ceramsite and is 10-20 cm in thickness.

2. The salt-isolated rain garden structure according to claim 1 , wherein the particle size of the river sand is 0.25-0.35 mm; the particle size of the zeolite is 2-4 mm; or the particle size of the ceramsite is 10-25 mm.

3. The salt-isolated rain garden structure according to claim 1 , wherein the drainage layer is filled with gravel with a diameter of 10-20 mm.

4. The salt-isolated rain garden structure according to claim 1 , wherein the transition layer is filled with medium sand with a particle size of 0.35-0.50 mm.

5. The salt-isolated rain garden structure according to claim 1 , wherein the filler layer is planting soil comprising a mixture of 30% of common greening topsoil, 50% of sandy soil and 20% of peat soil (by volume).

6. The salt-isolated rain garden structure according to claim 1 , wherein the mulch layer is bark or gravel, and the transition layer is a permeable geotextile or medium sand.

Assignees

• Shanghai Municipal Eng Design Inst Group Co Ltd
• Univ Shanghai Jiaotong
• Shanghai Municipal Eng Design Instilute Group Co Ltd

Inventors

• Yu Bingqin
• Che Shengquan
• Wang Lu
• Mo Zulan
• Lv Yongpeng
• Chen Yan
• Zhang Chen

Classifications

• A01G24/42 Primary

  of granular or aggregated structure · CPC title

• Y02A40/28

  specially adapted for farming · CPC title

• E03F1/002 Primary

  with disposal into the ground, e.g. via dry wells · CPC title

• E03F1/001

  into a body of water · CPC title

• E03F5/103 Primary

  Naturals or landscape retention bodies, e.g. ponds · CPC title