摘要
通过abaqus有限元方法模拟长江中下游地层和地质条件下破碎围岩浅埋隧道开挖过程,对加筋玻璃纤维锚杆注浆技术加固掌子面前后分别建立模型并进行对比分析强化结果,研究表明:玻璃纤维锚杆注浆加固能较大程度提高掌子面前方核心岩土体的黏聚力c、内摩擦角φ、弹性模量E和抗剪强度τ,加固后地表沉降减少了约20%,拱顶沉降量减少20%,掌子面纵向位移约30%,水平收敛减小10%,有效提高长江中下游地层和地质条件下破碎围岩浅埋隧道掌子面及其周围围岩的稳定性。
Here, by using abaqus finite element method to simulate a broken shallow-buried tunnel＇s excavation process in the geological conditions of the middle and lower area of Yangtze River, the models are set up to research the strength- ening results respectively. The research results show that the grouting glass fiber bolt consolidation method could largely improve the tunnel face＇ s core body in the cohesion force c, internal friction angle ~, elastic modulus E and shear strength r after strengthening, the ground surface settlement reduces by about 20%, the vault settlement reduces by 20%, the longitudinal displacement reduces by about 30%, and the horizontal convergence reduces by 10%, all these as mentioned above could effectively improve the stability of surrounding rocks of the shallow broken tunnel face in the ge- ological conditions of the middle and lower area of Yangtze River.
出处
《水利与建筑工程学报》
2012年第4期131-135,共5页
Journal of Water Resources and Architectural Engineering
关键词
玻璃纤维锚杆
掌子面加固
围岩稳定性
ABAQUS
数值模拟
glass fiber anchor
tunnel heading face strengthening
surrounding rock stability
abaqus
numericalsimulation
作者简介
孙会想（1985-），男（汉族），河南商丘人，硕士研究生，研究方向为隧道及地下工程。
