摘要
以青岛胶州湾海底隧道团岛段小间距隧道为例,通过现场监测结果分析了小间距非对称浅埋隧道的围岩压力特征及支护受力,结果表明该隧道后行洞围岩压力及支护受力都较大,这种结果有别于大部分小间距对称隧道的理论预测及实测结果。为有效缓解这些问题,对支护参数进行及时调整,增强后行洞的径向支护能力并对中间岩柱采取加固措施。继后施工中的监测结果显示,后行洞的稳定性得到了有效的控制,为类似小间距隧道的设计和施工提供了借鉴和参考。
The ultra-small spacing tunnel of Jiaozhou Bay seabed tunnel in Qingdao is took for example;the surrounding rock pressure features and support force are analyzed through the field measurement.Results show that the surrounding rock pressure and support force of the after-excavation tunnel are larger than others of the tunnel.This result is different from the theoretical predictions and experimental results of most of the small spacing symmetry tunnel.To alleviate these problems effectively,support parameters are adjusted opportunely;the radial support capacity of the after-excavation tunnel is enhanced,and reinforcement measures of rock pillar are made at the same time.The monitoring results show that the stability of the after-construction tunnel has been effectively controlled,which provides useful reference for the design and construction of similar tunnels with small spacing.
出处
《中国工程科学》
北大核心
2012年第11期24-28,共5页
Strategic Study of CAE
基金
国家自然科学基金"面上"项目(C11A300120)
关键词
隧道
超小间距
非对称
浅埋
监测
tunnel
ultra-small spacing
asymmetric
shallow-buried
field measurement
