LIANG Hang-hang,LI Xiao-le,ZHANG Xun,et al.Optimization Analysis of Rainwater Infiltration in Bioretention Zone near Municipal Roads[J].China Water & Wastewater,2020,36(15 15):107-112.
Optimization Analysis of Rainwater Infiltration in Bioretention Zone near Municipal Roads
China Water & Wastewater[ISSN:1000-4062/CN:12-1073/TU]
volume:
第36卷
Number:
15 15
Page:
107-112
Column:
Date of publication:
2020-08-01
- Keywords:
- sponge city; municipal road; bioretention zone; anti-seepage membrane; fluid-soild coupling
- Abstract:
- There are still many shortcomings in the study of anti-seepage membrane laying method, anti-seepage effect evaluation and influence range of rainwater infiltration in the bioretention zone of the sponge type municipal road. The percolation analysis module SEEP/W and stress strain analysis module SIGMA/W in GeoStudio software were used for fluid-solid coupling analysis. For two different types of bioretention zones under the action of rainwater infiltration, variation of water content and subsidence of foundation soil were analyzed when different extension lengths of anti-seepage membrane at the bottom of the retention zone were used. On the premise of ensuring that rainwater infiltration did not have a disastrous effect on the road surface, the extension length of anti-seepage membrane was optimized. Numerical analysis showed that the anti-seepage membrane could be laid only on the side in the transport-type bioretention zone. For the infiltration-type bioretention zone, when the anti-seepage membrane extends 0.5 m on both sides of the bottom of the facility, it could meet the need of rainwater infiltration in the detention zone. The smaller the grading ratio of the infiltration-type retention facilities was, the less the impact of rainwater infiltration on the foundation soil under the same conditions had.
Last Update:
2020-08-01