浅埋偏压隧道出口段病害工程变形监测及整治措施

Deformation Monitoring and Improvement Measures about Damaged Engineering of Exit Section of Shallow Buried Bias Tunnel

雷家隧道出口段存在浅埋、偏压、围岩强度低、地下水发育、千枚岩边坡易软化、抗滑能力差等不利于工程构筑物稳定的地质条件。为预防施工安全事故,确保工程质量,根据现场工况条件设计了隧道出口段相关工程变形监测方案。该文通过分析边仰坡、支挡工程、隧道出口段等构筑物的长期变形监测数据,探究了构筑物的变形特征和变形原因,并根据变形原因优化了病害工程整治方案。结果表明:变形监测及稳定性分析工作为优化隧道出口段工程病害整治方案提供了信息指导,为确保工程质量和隧道运营安全提供了技术支持。

The exit section of Leijia Tunnel has some unfavorable geological conditions for stability of en-gineering structure,such as shallow burial,bias pressure,weak surrounding rock,groundwater develop-ment,phyllite rock slope soften easily and poor anti-sliding ability.In order to prevent construction acci-dents and ensure quality of engineering,the deformation monitoring measures of tunnel exit section is de-signed according to the site working conditions.This paper explores the deformation characteristics and causes of structures through analyzing the long-term monitoring data of side and front slopes,support works and tunnel exit section.Based on the deformation reasons,the engineering treatment plans are pro-vided.The results show that the work of deformation monitoring and stability analysis provide information guidance for optimization of the treatment measures for tunnel exit section.It provides technical support for ensuring engineering quality and tunnel operation safety.