盘道岭隧洞加固处理期监测设计及仪器埋设

Monitoring Design and Instrument Embedment of Pandaoling Tunnel During Consolidation Period

盘道岭隧洞是我国已建的最长的软岩无压引水隧洞，隧洞洞身穿过地段地质条件复杂多变，由于种种原因造成二次衬砌开裂，在加固处理二次衬砌裂缝时，要求通过监测手段来定量评价加固处理效果及判明洞身围岩稳定状态。论述了加固处理中监测内容的确定、设备选型及其特性、观测设备的总体布置原则，同时提出了各主要仪器的埋设方法，说明了主要监测成果及结论。

Pandaoling diversion tunnel is the longest and free flow tunnel surrounded with soft rock in our country. Because of all kinds of reasons, the second lining split. The tunnel has complicated engineering geologic conditions and surrounded with both soft and hard rocks. Thus the consolidation effects and the steady state of tunnel surrounding rocks must be evaluated. This paper discusses how to determine the monitoring content, to select instruments as well as its specific property, to arrange observing instruments, and to put forward embedment method of main instruments. The main monitoring results and conclusion are also presented.