An Innovative Approach for Recycling the Subway Construction Waste in Shenzhen, China

Large volumes of construction waste have been produced with the rapid development of subway projects in Shenzhen, China. To solve the problems of difficult storage and low resource utilization of the subway construction waste, Shenzhen government has required the contractors to reduce the subway construction waste by onsite and offsite treatment processes since May 2019. This study introduces an offsite treatment process of the subway construction waste in Shenzhen. Some improvement measures such as replacing drum-type sand screening and settling tanks with centrifugal solid-liquid separation equipment and inclined plate sedimentation equipment are proposed to recycle fine sand and heighten treatment efficiency.