工期紧地质差条件下隧道施工技术和措施

The Construction Technique and Measures of Tunnelling Under the Condition of Short Time Limit and Weak Ground Soil

京九铁路赣南吉安至赣粤省界段地质不良，降雨量多，工程艰巨，加之设计方案定得晚，开工滞后，因此工期紧张的矛盾十分突出。特别是隧道工程大部分为软弱围岩。本文介绍该段重点隧道施工中如何解决工期矛盾和软弱围岩隧道施工的技术措施。这些措施，对确保工期，取得良好的技术经济效益起了重要的作用。

The 346km long section from Ji'an to Guangdong boundary on Beijing-Jiulong Railway Line is in the cindition of weak ground soil and abundant rainfall,the construction is very difficult. Furthermore,the design scheme is determined late and the work is carried out behind the schedule. The problem of time limit shortage is very serious. In this paper,the measures for solving the problem of time limit shortage and for tunnelling in soft and weak soil are discussed.These measures play an important role in ensuring time limit and achieving good technical and economic benifits.