干旱区生态环境知识资源中心(Arid): Evaluating the New Temporary Lining Repair of 4 m Diameter PCCP to Improve MMRA Phase I Pipeline Integrity

Arid

	Evaluating the New Temporary Lining Repair of 4 m Diameter PCCP to Improve MMRA Phase I Pipeline Integrity
	Elnakhat, Hassan A.; Alarifi, Ali M. S.; Gheryani, Fathalla A.; Bousheha, Mostafa Rashed Mohamed
通讯作者	Elnakhat, HA (corresponding author), MMRA, Schaumburg, IL 60173 USA.
会议名称	Pipelines Conference on Building Today's Infrastructure for a Changing Tomorrow
会议日期	AUG 03-06, 2021
会议地点	ELECTR NETWORK
英文摘要	The Man-Made River Project (MMRA) is one of the largest water projects in the world. It consists of 4,000 km of mainly 4-m (158-in.) diameter prestressed concrete cylinder pipe (PCCP) with other various diameters as well (1.60, 2.00, 2.80, and 3.60 m). The system can convey over 6 million cubic meters of water per day from well fields deep in the Sahara Desert to the populated areas on the coast and is divided into four main phases. In August 2020, a leak was observed on one of the main branches between Ajdabiya and Benghazi of MMRA Phase One. This segment has a total length of 150 km, and the leakage was near to the Omar Almokhtar grand reservoir. After many preventive measures were taken to stop the leakage, operations were stopped on the line and the pipeline was dewatered between two stations in the area. An internal visual and sounding inspection was carried out to find the cause of the leakage. Two damaged PCCP pipes were found during the internal inspection, but immediate replacement was not possible due to a lack of available resources and specialized equipment. A new temporary method was developed by lining the total length of the inner concrete core with multiple metal welded bell ring segments. After installation, the rings were used to support the PCCP to handle the working pressure and external loads during refill and operation of the pipeline for several weeks. This temporary repair was meant to compensate for the shortage in water supply to the city of Benghazi and to complete the logistical preparations with replacement work. This paper will discuss and analyze the collected data to evaluate how the new temporary lining repair works were conducted and applied, until MMRA could renew and replace the selected defective sections of PCCP with new sections.
来源出版物	PIPELINES 2021: CONSTRUCTION AND REHABILITATION
出版年	2021
页码	379-386
ISBN	978-0-7844-8362-6
出版者	AMER SOC CIVIL ENGINEERS
类型	Proceedings Paper
语种	英语
收录类别	CPCI-S
WOS记录号	WOS:000698131300042
WOS类目	Construction & Building Technology ; Engineering, Civil
WOS研究方向	Construction & Building Technology ; Engineering
资源类型	会议论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/365657
作者单位	[Elnakhat, Hassan A.; Alarifi, Ali M. S.; Gheryani, Fathalla A.; Bousheha, Mostafa Rashed Mohamed] MMRA, Schaumburg, IL 60173 USA
推荐引用方式 GB/T 7714	Elnakhat, Hassan A.,Alarifi, Ali M. S.,Gheryani, Fathalla A.,et al. Evaluating the New Temporary Lining Repair of 4 m Diameter PCCP to Improve MMRA Phase I Pipeline Integrity[C]:AMER SOC CIVIL ENGINEERS,2021:379-386.