高速铁路斜井下穿石油管道弱爆破施工技术
2017-05-11罗康勇
罗康勇
摘要: 在我国大规模的高速铁路网建设中,必将会遇到高速铁路斜井下穿石油天然气管道的情况,如何采用安全可靠、经济合理的施工方案,切实保障石油管道的安全,是施工单位必须认真研究的课题。本工点采用弱爆破施工技术,并事先对穿越施工方案的合理性、可行性进行充分论证,在爆破施工前进行试爆并通过地震波监测,收集相关参数来验证控制爆破方案可行性。通过科学化、精细化的组织施工,此处石油管道穿越工程得以安全通过,顺利完成预期目标,确保了石油管道安全。
Abstract: In the construction of large-scale high-speed railway network, it will encounter the situation of high-speed railway inclined well under-passing oil and gas pipeline. How to adopt safe, economical and reasonable construction scheme and ensure the safety of oil pipeline is the subject that the construction unit must seriously study. The construction technology of weak explosion is used in this workshop, and the rationality and feasibility of the construction scheme are fully demonstrated beforehand. The explosion test is carried out before the blasting construction and the relevant parameters are collected to verify the feasibility of the control blasting scheme. Through the scientific and meticulous organization and construction, the oil pipeline under-passing project is safely completed, the expected objectives are successfully completed, and the safety of oil pipelines is ensured.
关键词: 斜井;下穿;弱爆;技术
Key words: inclined well;under-passing;weak explosion;technology
中图分类号:U455.6 文献标识码:A 文章编号:1006-4311(2017)15-0097-04
1 工程概况
西安至成都客运专线金家岩隧道1号斜井位于线路前进方向的右侧,与线路交点里程DK452+200。该工区施工采用无轨单车道运输组织,永久性工程设计,斜井净空断面尺寸为5.0m×5.9m(宽×高)。斜井下穿兰成渝输油管道,平面投影相交里程为XD1K0+163,斜井與隧洞地表输油管道垂直距离仅28.42m,?准508mm兰成渝输油钢管与斜井相交纵断面图如图1。
2 岩土工程爆破研究
2.1 岩土工程爆破作用原理
岩石的破坏是应力波和爆轰气体共同作用的结果,爆轰波波阵面的压力和传播速度大大高于爆轰气体产物的压力和传播速度。爆轰波首先作用于药包周围的岩壁上,在岩石中激发形成冲击波并很快衰减为应力波。冲击波在药包附近的岩石产生“压碎”现象,应力波在压碎区域之外产生径向裂隙。
随后,爆轰气体产物继续压缩被冲击波压碎的岩石,报轰气体“楔入”在应力波作用下产生的裂隙中,使之继续向前延伸和进一步张开。……
