再论隧道超欠挖的分析与检测

Discussion on analysis and monitoring of over and under-break in tunnelling

文章对隧道超欠挖问题进行了分析,评价了超欠挖的计算方法,指出了超欠挖对隧道工程的影响,同时介绍了超欠挖的各种检测方法,并把这些方法分为接触式和非接触式两类来阐述,以此作为隧道施工监控和验收的依据。

The problems of over and under - break in tunnelling are analyzed in this paper. Several calculation methods are then listed and evaluated. And various influence on tunnelling caused by over and under - break are presented. The analysis shows that it is essential to monitor and controll the over and under -break. In this paper the monitoring methods of over and under -break are also introduced which are divided into two types:contact and non - contact. It can be taken as the reference for control and acceptance of tunnel construction.