摘要
土压平衡顶管技术,在覆土厚度不低于0.8D的前提下,可安全地用于地下管道非开挖施工。作者以黄冈遗爱湖截污疏浚DN 2400管道工程——试验段(158m)土压平衡顶管的成功实践为例,对不良地质条件下(0.5～0.6D的低覆土厚度,素填土地层、局部杂填夹有块石和建筑垃圾等)大口径土压平衡顶管施工中地面变形控制等技术问题作以探讨。据初步了解,该工程的成功实践,目前在国内尚属首次。此施工案例的成功,有助于推动土压平衡式顶管技术的革新与进步,对今后类似工程具有一定的指导作用。
Earth pressure balance pipe jacking technology, it can be safely used for soil as shallow as 0. 8 times of OD. The authors introduced Huanggang Yi--ai Lake interception in dredging DN 2400 pipeline -- test section （158m） of earth pressure balance pipe jacking successful practice. Through cases, adverse geological conditions of large diameter earth pressure balance pipe jacking technologies such as ground deformation control issues to explore. At present there is not yet the success- ful practice of the project in China. The success of this case will help to promote the construction of earth pressure balance pipe jacking technology, innovation and progress, for future similar projects with some guidance.
出处
《岩土工程技术》
2010年第5期260-263,共4页
Geotechnical Engineering Technique
关键词
顶管
土压平衡式
低覆土厚度
地面变形控制
jacking pipe
earth pressure balanee
shallow soil
ground deformation control
