摘要
盾构法在地铁区间隧道的施工上发挥着重要的作用,然而盾构施工过程中不可避免地会引起地层损失,如何通过监测数据更精确地计算地层损失率等参数是工程界长期研究的问题。通过对北京地铁房山线北延工程的3个盾构区间实测数据的分析,选取符合Peck公式的主测断面,然后通过Originlab将实测数据拟合成Peck公式曲线,从而可以反推出地层损失率以及沉降槽宽度系数,可为北京地区卵石地层盾构区间地层损失率以及沉降槽宽度系数的取值提供依据。
Shield method plays an important role in the construction of Metro tunnel,however,it will inevitably cause ground loss during shield construction.How to calculate formation loss rate and other parameters more accurately by monitoring data is a long-term research problem in the industry.After analyzing the measured data of three shield sections in the north extension project of Fangshan Line,Beijing Subway,the main testing section which accords with the Peck’s formula is selected,and then the measured data is fitted into Peck’s formula curve using Originlab program,thus the formation loss rate and the width coefficient of the subsidence can be derived.The study could provide a basis for the determination of the formation loss rate and the width coefficient of the subsidence of shield tunneling through the cobble stratum in Beijing area.
作者
赵雄
Zhao Xiong(Beijing Survey and Design Institute Co.,Ltd.,Beijing 100038,China)
出处
《工程勘察》
2020年第11期13-16,共4页
Geotechnical Investigation & Surveying
