基于组合梁简化模型的地铁隧道地表沉降研究
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摘要
城市地铁隧道建设打破了原有地层的初始应力平衡状态,导致地层变形,对既有建(构)筑物产生重要的影响。地层变形预测常采用Peck公式计算盾构隧道施工诱发地层变形量,本文基于组合梁简化模型,通过理论推导,提出了一种地铁隧道地表沉降计算方法,并与现场监测数据、Peck曲线进行了对比,验证了组合梁简化模型的可靠性。
The construction of urban metro tunnel breaks the initial stress balance of the original stratum,causes stratum deformation,and has an important impact on existing buildings. The Peck formula is often used to calculate the ground deformation induced by shield tunnel construction. Based on the simplified model of composite beam,a method for calculating ground settlement of metro tunnel is proposed through theoretical deduction.The reliability of the simplified model of composite beam is verified by comparing with the field monitoring data and Peck curve.
The construction of urban metro tunnel breaks the initial stress balance of the original stratum,causes stratum deformation,and has an important impact on existing buildings. The Peck formula is often used to calculate the ground deformation induced by shield tunnel construction. Based on the simplified model of composite beam,a method for calculating ground settlement of metro tunnel is proposed through theoretical deduction.The reliability of the simplified model of composite beam is verified by comparing with the field monitoring data and Peck curve.
引文
[1]朱才辉,李宁.地铁施工诱发地表最大沉降量估算及规律分析[J].岩石力学与工程学报,2017,36(S1):35-38.
[2]康庄,宫全美,何超.基于盾构隧道斜交下穿的修正Peck公式法[J].同济大学学报(自然科学版),2014,42(10):62-66.
[3]郑馨,麻凤海.长春地层地铁隧道施工的Peck公式改进[J].地下空间与工程学报,2017,13(3):32-36.
[4] Peck R B. Deep excavations and tunnelling in soft ground[J].Proc. int. conf. on Smfe,1969:225-290.
[5]赵春彦,周顺华,袁建议.地铁荷载作用下叠交隧道长期沉降的半解析法[J].铁道学报,2010,32(4):141-145.
[6]王剑晨,张顶立,张成平,等.浅埋暗挖隧道近距施工引起的上覆地铁结构变形分析[J].岩石力学与工程学报,2014,33(1):90-97.
[2]康庄,宫全美,何超.基于盾构隧道斜交下穿的修正Peck公式法[J].同济大学学报(自然科学版),2014,42(10):62-66.
[3]郑馨,麻凤海.长春地层地铁隧道施工的Peck公式改进[J].地下空间与工程学报,2017,13(3):32-36.
[4] Peck R B. Deep excavations and tunnelling in soft ground[J].Proc. int. conf. on Smfe,1969:225-290.
[5]赵春彦,周顺华,袁建议.地铁荷载作用下叠交隧道长期沉降的半解析法[J].铁道学报,2010,32(4):141-145.
[6]王剑晨,张顶立,张成平,等.浅埋暗挖隧道近距施工引起的上覆地铁结构变形分析[J].岩石力学与工程学报,2014,33(1):90-97.