水利与建筑工程学报
水利與建築工程學報
수리여건축공정학보
TECHNIQUE OF SEEPAGE CONTROL
2012年
4期
131-135
,共5页
玻璃纤维锚杆%掌子面加固%围岩稳定性%abaqus%数值模拟
玻璃纖維錨桿%掌子麵加固%圍巖穩定性%abaqus%數值模擬
파리섬유묘간%장자면가고%위암은정성%abaqus%수치모의
glass fiber anchor%tunnel heading face strengthening%surrounding rock stability%abaqus%numericalsimulation
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。
通過abaqus有限元方法模擬長江中下遊地層和地質條件下破碎圍巖淺埋隧道開挖過程,對加觔玻璃纖維錨桿註漿技術加固掌子麵前後分彆建立模型併進行對比分析彊化結果,研究錶明：玻璃纖維錨桿註漿加固能較大程度提高掌子麵前方覈心巖土體的黏聚力c、內摩抆角φ、彈性模量E和抗剪彊度τ,加固後地錶沉降減少瞭約20%,拱頂沉降量減少20%,掌子麵縱嚮位移約30%,水平收斂減小10%,有效提高長江中下遊地層和地質條件下破碎圍巖淺埋隧道掌子麵及其週圍圍巖的穩定性。
통과abaqus유한원방법모의장강중하유지층화지질조건하파쇄위암천매수도개알과정,대가근파리섬유묘간주장기술가고장자면전후분별건립모형병진행대비분석강화결과,연구표명：파리섬유묘간주장가고능교대정도제고장자면전방핵심암토체적점취력c、내마찰각φ、탄성모량E화항전강도τ,가고후지표침강감소료약20%,공정침강량감소20%,장자면종향위이약30%,수평수렴감소10%,유효제고장강중하유지층화지질조건하파쇄위암천매수도장자면급기주위위암적은정성。
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.
