浅埋偏压隧道动力响应与加固技术研究

作者:王国权
单位:宁波市城建设计研究院有限公司
摘要:以某浅埋偏压隧道为例,采用有限元软件ABAQUS分析不同围岩类型、偏压角度下隧道动力响应和围岩稳定性,并研究抗滑桩桩长对隧道加固效果的影响。研究结果表明,随着偏压角度的增大和围岩等级的降低,塑性区范围逐渐增大,且深埋侧塑性区发展较快,围岩稳定性降低;抗滑桩虽未改善隧道偏压现象,但有助于降低衬砌最大压应力和最大变形,且抗滑桩存在最优长度;衬砌最大压应力随着抗滑桩与隧道距离的增加先减小后增大。
关键词:隧道抗滑桩支护浅埋偏压动力响应围岩稳定性有限元分析
作者简介:王国权,高级工程师,E-mail:8285095@qq.com。
基金:国家自然科学基金(51578408);宁波市科研课题:基于BIM的大跨度市政隧道合理设计施工参数与安全双控信息化技术研究项目。 -页码-:57-62
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Research on the Dynamic Response and Reinforcement Technology of Shallow Buried Bias Tunnel
WANG Guoquan
(Ningbo Urban Construction Design & Research Institute Co., Ltd.)
Abstract: Based on a construction project of shallow buried bias tunnel, the finite element software ABAQUS was used to analyzed the structural dynamic response and surrounding rock stability of shallow buried bias tunnel under different surrounding rock types and different bias angles, and the effect of pile length on the reinforcement of shallow buried bias tunnel was studied. The results show that with the bias angle increase and surrounding rock grade reduce, the plastic zone increases, the plastic zone on deep buried side develops faster than that on shallow buried side, and the stability of surrounding rock decreases. Anti-slide piles does not change the bias phenomenon, but can reduce the maximum compressive stress and deformation of lining, and anti-slide piles have the optimal length. The maximum compressive stress of lining structure decreases first and then increases with the distance of anti-slide piles away from tunnel.
Keywords: tunnels; anti-slide piles; supports; shallow buried bias; dynamic response; surrounding rock stability; finite element analysis
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