浅谈喀斯特地区大口径长输管道岩石顶管

Discussion on Rock Jacking of Large Diameter Long Distance Pipeline in Karst Areas

摘要: 中缅(国内段)项目在顶管方案选择中，如果穿越地区为岩石地层，按照常规的选择，我们有两种方法：一是采用液压风镐破碎岩石。二是选用国外(德国海瑞克或日本拉萨公司等)岩石顶管机。前者顶进速度缓慢，不适合长距离施工；后者造价昂贵，在中缅管道(国内段)施工中大部分的顶进作业为“土层–岩石层–土层”交替施工，使用岩石顶管机除了要大大增加项目投资外，也显示不了设备的优越性。因此根据贵州地区在岩石层隧道施工的方法，结合中缅管道(国内段)的工程实际情况，最终决定采用敞开式顶管和微差控制爆破成孔顶进的方法，即“顶管–爆破施工技术”。

Abstract: In the pipe-jacking plan of China & Myanmar (domestic) project, if the rout got across the rock stratum regions, two methods will be chosen according to the common methods: one method is that the rock was broken by hydraulic-pneumatic hammer; another is to choose the rock pipe- jacking machine of a foreign company (German herrenknecht or Japanese companies, etc.) in Lhasa. The speed of the former method is slow and it was not suitable for long distance constructions, while the expenses of the latter were expensive. The construction of “soil-rock-soil” in turn was common among most parts of the jacking operations in China & Myanmar (domestic) project. Like this practical situation, the use of rock pipe-jacking machine not only increased the extra expenses of project, but also the superiority of the equipment could not be reflected. According to Guizhou province in rock tunnel construction method, combined with the actual engineering situation in project of China & Myanmar pipe (domestic), the open pipe-jacking and differential controlling blasting hole was used in jacking and propelling project. The technology was called pipe-jacking and blasting construction.