Loss of a 30¡å directional crossing due to pipeline collapse during pullback
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- 作者：Janine Booman ; Hernan Kunert ; Jos¨¦ Luis Otegui
- 关键词：HDD crossing ; Pipe collapse ; Tunnel loss ; Failure during pullback
- 刊名：Engineering Failure Analysis
- 出版年：2013
- 出版时间：October, 2013
- 年：2013
- 卷：33
- 期：Complete
- 页码：388-397
- 全文大小：2385 K
文摘
This article concerns the loss of a Horizontal Directional Drilling crossing due to a failure that took place during pullback of the pipeline. The more than 500 m long drilling was meant to lodge a 30¡å pipeline that crossed a large river. The failure caused the total loss of the crossing, and the necessity to repeat the entire process in another, less favorable location. Root causes involved a difficult soil composition, and constraints at a populated bank that led to engineering solutions not proved before on a pipe of such diameter. Discontinuities on the tunnel and the use of a sacrifice pipe at the front end of the pipe column, which was related to the need for more pipes than originally calculated because of a series of problems at the beginning of the perforation, were also defined as root causes. Lessons learned are highlighted.