ZHANG Ying-qiu,WANGFeng,YANGWan-hang.Application of Spiral Winding Method in Trenchless Repair of Super Large Diameter Drainage Pipeline[J].China Water & Wastewater,2022,38(6):5-9.
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Application of Spiral Winding Method in Trenchless Repair of Super Large Diameter Drainage Pipeline

China Water & Wastewater[ISSN:1000-4062/CN:12-1073/TU] volume: 第38卷 Number: 第6期 Page: 5-9 Column: Date of publication: 2022-03-17
Author(s):
ZHANG Ying-qiu1; 2;  WANG　Feng1; 3;  YANG　Wan-hang1; 3
（1. Jiujiang Three Gorges Water Environment Comprehensive Treatment Co. Ltd.， Jiujiang 332001，China； 2. China Construction Second Engineering Bureau Ltd.， Beijing 101101， China； 3. Yangtze Ecology and Environment Co. Ltd.， Wuhan 430062， China）
Keywords:
mechanical spiral winding method;  large diameter drainage pipeline;  trenchless repair
Abstract:
Trenchless repair technology of drainage pipeline has been widely applied in practical engineering due to its advantages of low environmental impact and high work efficiency. However, there are few trenchless repair cases for pipes with length of more than 5 km and diameter of 2 000 mm. The diameter of Shilihe sewage interception pipeline in Jiujiang is between DN2 000 and DN2 200. CCTV data showed that the pipeline had a high defect rate and needed to be repaired. According to the current situation of pipeline, mechanical spiral winding technology was applied for trenchless repair of Shilihe sewage interception pipeline with a super large diameter. In the process of repair, problems such as difficult to discharge large amount of wastewater over long distance, immature repair process of large pipe diameter and high safety risk of limited space operation were overcome, and the engineering task was successfully completed. CCTV test results showed that good repair performance was obtained.
Last Update: 2022-03-17