浅埋隧道边坡滑移与衬砌开裂病害分析  

Cause analysis of slope slipping and lining cracking of a shallow tunnel

作　　者：张连成[1] 闫小波[2] 邓涛[2] 

机构地区：[1]长安大学公路学院,陕西西安710012 [2]福州大学土木工程学院,福建福州350108

出　　处：《福州大学学报（自然科学版）》2011年第2期281-286,共6页Journal of Fuzhou University(Natural Science Edition)

基　　金：交通部西部交通建设科技资助项目(20073180038);福州大学科技启动基金资助项目(826407);福州大学发展基金资助项目(826301)

摘　　要：某隧道是一座分离式浅埋隧道,进口段存在偏压现象.在隧道修建过程中相继出现边坡滑移、二衬开裂掉块等病害.为分析病害原因,对洞内变形、二衬表面应变、临时支撑应力及边坡表层、深部滑移等项目进行了系统的监测.监测数据显示洞内变形基本稳定、边坡滑移发生在浅层.结合现场调查,认为二衬开裂掉块的主要原因是混凝土施工质量缺陷,而边坡表层滑移主要原因是边坡在人为扰动影响下因降雨导致,洞内的衬砌开裂与边坡滑移基本无相互影响.最后给出了相应的治理方案.A separate - type shallow tunnel bears unsymmetrical loading in the entrance region. In the process of the construction, it happened slope slipping and secondary lining cracking successively. In order to reveal the reasons, system monitoring items were executed aiming at the deformation of the tunnel contour, the surface strain of the secondary lining, the forces of the temporary support frame and displacements on the surface of and inside the slope. The monitoring data showed that there were no obvious deformation of the lining and the slipping occurred in the shadow layer. In combination with the field survey, it was concluded that the secondary lining cracking was caused by the quality defects of concrete, and the rainfall induced the slope slipping under the influence of human disturb- ance, and there was no connection between the lining cracking and the slope slipping. Finally, the appropriate treatment program was proposed.

关 键 词：隧道 偏压 衬砌开裂 边坡滑移 监测 

分 类 号：U455[建筑科学—桥梁与隧道工程]