摘要
针对目前我国隧道和地下工程围岩分级方法存在的工作量大、耗时长,且围岩分级无法反映掌子面前方岩土体信息等问题,基于隧道和地下工程施工中进行的超前地质预报获得的掌子面前方一定范围内围岩的地质特征信息,以岩石的回弹强度和隧道掌子面岩土体的状态定量评价指标代替岩石的饱和单轴抗压强度及隧道地应力状态评价指标,综合考虑掌子面岩土体节理延展性的定性评价指标,提出了基于超前地质预报信息的隧道和地下工程围岩分级新方法.结合东北某隧道施工期围岩分级的实践,验证了提出的基于超前地质预报信息的隧道和地下工程围岩分级新方法的合理、可行性,指导了该隧道的施工,确保了工程的安全施工.
The conventional surrounding rock classification needs a lot of laboratory tests and field survey, and there is conflict be- tween its time consumption and tunnel construction progress demanded. Furthermore, the conventional classification can not reflect the front information of tunnel face because of the limitation of observation. Aiming at the above problems, the paper proposed a new classification method based on the advanced geological information. The method adopted rock rebound strength and tunnel face state instead of uniaxial compression strength of saturated rock and ground stress state of traditional classification method, and the trace length of joint plane is added as an index. The indices of tunnel face state were obtained by advance geological information. Finally, the classification method had been applied in a tunnel of northeast region of China with ideal effect, whose results guided the tunnel construction successfully.
出处
《西安建筑科技大学学报（自然科学版）》
CSCD
北大核心
2016年第5期648-653,共6页
Journal of Xi'an University of Architecture & Technology(Natural Science Edition)
基金
国家自然科学基金项目(51578447
51308443)
关键词
隧道工程
围岩分级
地质预报
岩石的回弹强度
tunnel engineering
surrounding rock classification
geological forecast
rebound rock strength
