CAJ | 학술논문

杭州地铁盾构施工多处在淤泥、淤泥质土等软土层中。在实测数据的基础上，分析了地铁盾构施工地表沉降在纵向和横向上的变化规律、沉降范围以及沉降槽宽度系数和最大沉降量与隧道埋深间的关系。分析结果表明，地表沉降根据沉降大小和盾构机头的位置在轴线方向上分三个阶段，即盾构机到达前0～40 m、到达后0～50 m和后盾构等三个阶段。以盾构机头为中心，地表沉降的纵向影响范围为前40 m、后50 m，横向上为左右两侧各20 m。盾构施工期间地表位移主要表现为沉降，但也有隆起，盾构到达后的20～50 m为沉降发生的主要阶段，后盾构阶段沉降稳定，但也存在部分回弹现象。沉降槽宽度系数随着埋深的增加影响范围增大，而地表最大沉降量则随着埋深的增加减小。文中得到的结论对于杭州等软土地区地铁盾构施工、监测和设计等具有一定的指导作用和理论意义。
항주지철순구시공다처재어니、어니질토등연토층중。재실측수거적기출상，분석료지철순구시공지표침강재종향화횡향상적변화규률、침강범위이급침강조관도계수화최대침강량여수도매심간적관계。분석결과표명，지표침강근거침강대소화순구궤두적위치재축선방향상분삼개계단，즉순구궤도체전0～40 m、도체후0～50 m화후순구등삼개계단。이순구궤두위중심，지표침강적종향영향범위위전40 m、후50 m，횡향상위좌우량측각20 m。순구시공기간지표위이주요표현위침강，단야유륭기，순구도체후적20～50 m위침강발생적주요계단，후순구계단침강은정，단야존재부분회탄현상。침강조관도계수수착매심적증가영향범위증대，이지표최대침강량칙수착매심적증가감소。문중득도적결론대우항주등연토지구지철순구시공、감측화설계등구유일정적지도작용화이론의의。
Hangzhou metros are being constructed mainly in such silt and mucky soil as soft layers. Longitudinal and traverse surface settlements and variation law, settlement scope, settlement trough and relationship between maximum settlement and tunnel depth are analyzed during Hangzhou shield construction based on field datum. The results show that surface settlements are divided into such three stages as 0~40 m before shield machine, 0~50 m after and post-shield construction stage according to settlement magnitude and location of shield machine. Longitudinal settlement scope is 40 m before, 50 m after machine, and traverse scope is each side of 20 m of machine. Surface settlements ,which are mainly caused at stage of 20~50 m after shield machine ,as well as heaves , can be seen during shield construction while settlements accompanying upheavals are stable at stage of post-shield construction. Settlement trough coefficients increase with tunnel depths, and maximum settlement decreases with depth. The gained conclusions have theoretical significance and guidance for design, supervising and shield construction.