现代城市轨道交通
現代城市軌道交通
현대성시궤도교통
MODERN URBAN TRANSIT
2014年
1期
82-85
,共4页
盾构隧道%下穿江堤%含气地层%沉降控制%分析
盾構隧道%下穿江隄%含氣地層%沉降控製%分析
순구수도%하천강제%함기지층%침강공제%분석
shield tunnel%passing under bank%gas-containing formation%settlement control%analysis
针对杭州地铁某盾构隧道下穿富含沼气地层的防洪大堤工程，数值模拟分析盾构下穿防洪大堤过程中引起的大堤沉降和分层注浆加固对沼气释放引起的大堤沉降控制效果，借此提出合理的大堤沉降综合控制措施。研究表明，分层注浆加固对控制大堤沉降效果明显，最大沉降值减小幅度达31.9%；沼气释放对大堤的沉降影响较大，需要在推进过程中严格控制盾构土仓压力和推进速度。
針對杭州地鐵某盾構隧道下穿富含沼氣地層的防洪大隄工程，數值模擬分析盾構下穿防洪大隄過程中引起的大隄沉降和分層註漿加固對沼氣釋放引起的大隄沉降控製效果，藉此提齣閤理的大隄沉降綜閤控製措施。研究錶明，分層註漿加固對控製大隄沉降效果明顯，最大沉降值減小幅度達31.9%；沼氣釋放對大隄的沉降影響較大，需要在推進過程中嚴格控製盾構土倉壓力和推進速度。
침대항주지철모순구수도하천부함소기지층적방홍대제공정，수치모의분석순구하천방홍대제과정중인기적대제침강화분층주장가고대소기석방인기적대제침강공제효과，차차제출합리적대제침강종합공제조시。연구표명，분층주장가고대공제대제침강효과명현，최대침강치감소폭도체31.9%；소기석방대대제적침강영향교대，수요재추진과정중엄격공제순구토창압력화추진속도。
For the project of Hangzhou metro shield tunnel passing under bank with layers rich in methane, the numerical simulation analysis shows that bank settlement is caused during shield tunnel passing under embankment and layered grouting and enforcement, having the control effect of bank subsidence caused by methane release. Therefore reasonable comprehensive measures are put forward. The study shows that effect of layered grouting for control bank settlement is obvious, the reduce of maximum settlement value is by 29%, Release of methane has a very big impact on settlement so it is very important to strictly control soil pressure and shield advance speed.
