土工基础

›› 2019, Vol. 33 ›› Issue (3): 308-312.

• 工程实录 • 上一篇    下一篇

肋式连拱隧道拱顶山坡变形特征及对结构稳定性影响

易岳林1，房 涛1，余 飞2，陈善雄2，褚晓杰2   

  1. （1.安徽省交通控股集团有限公司，合肥 230088； 2.中国科学院 武汉岩土力学研究所，武汉 430071)
  • 收稿日期:2019-03-27 修回日期:2019-04-09 出版日期:2019-06-20 发布日期:2019-08-16
  • 作者简介:易岳林（1987-），男，工程师，研究方向为高速公路工程风险管理。

The Effect of Deformation at the Crest of Ribbed Double Arch Tunnel on Its Structural Stability

YI Yuelin1, FANG Tao1, YU Fei2, CHEN Shanxiong2,  CHU Xiaojie2   

  1. (1.Anhui Transportation Holding Group Co., Ltd., Hefei 230088;
    2.Institute of Rock and Soil Mechanics, Chinese Academy of Sciences, Wuhan 430071)
  • Received:2019-03-27 Revised:2019-04-09 Online:2019-06-20 Published:2019-08-16

摘要： 针对通透肋式连拱隧道的结构特征和受力变形特点，给出了与之相适应的施工监控量测方案；基于现场监测数据，分析了拱顶山坡变形随施工开挖过程的发展演化特征，给出了施工期主要风险-拱顶山坡地表开裂的形成原因；在此基础上，进一步分析了拱顶山坡围岩的松动范围和破坏模式，并采用结构荷载法对拱顶山坡岩体松动这一最不利工况下的衬砌结构、肋梁和中隔墙的结构强度和抗倾覆稳定性进行了系统反馈分析，分析表明隧道结构整体是安全的，但需对拱顶地表及围岩进行加固处理，以保证该新型隧道的施工安全和隧道结构的长期稳定性。

关键词: 肋式连拱隧道, 肋梁, 地表沉降, 监控量测, 反馈分析

Abstract: Construction monitoring plan for the ribbed double arch tunnel excavation was established based on its structural and stress-strain characteristics. The major risk in the tunnel excavation, which is the cracking at the crest of the tunnel, was evaluated based on the construction monitoring data. The lining structure, ribbed strengthening, and the midwall were evaluated based on the monitoring results and mitigation measures were implemented accordingly to ensure the safe excavation and operation of the tunnel.

Key words: Ribbed Double Arch Tunnel, Ribbed Beams, Ground Subsidence, Monitoring and Measurement, Back Analysis