摘要
以杭州地铁一号线红普路站—九堡站区间右线隧道盾构施工为背景,通过现场实测,对盾构推进过程中测点沉降的发展规律进行了分析,将测点的沉降历程曲线归为四类,并采用玻尔兹曼函数对沉降历程曲线进行了拟合.结果表明,采用波尔兹曼函数对沉降历程曲线的拟合效果显著;沉降发展具有时空特性,测点在盾构切口到达前,变形较小,盾构通过测点时,沉降发展较快,盾尾离开测点一段距离后,沉降速率减缓趋于稳定;在盾构施工过程中盾尾注浆效果的好坏对盾构通过测点时的沉降值减小是至关重要的.
On the background of shield tunnel right line construction from Hongpu station to Jiubao station in Hangzhou Metro Line One,the settlement law of measuring points among the shield pushing course was analyzed by field measurement.The settlement process curves of measuring points were classified as four kinds.They were fitted through Boltzmann function,and the fitting effect proved to be very prominent.Settlement development possessed space-time characteristic.Before the shield incision arrived,the settlement of measuring points was small.As the shield crossing the measuring points,the settlement developing speed was fast.After the shield tail left some distance,the settlement rate of measuring points tended to be stabilized.In the period of shield tunnel construction,the effect of grouting at shield tail was very important to the reduction of settlement value when the shield crosses the measuring points.
出处
《河南大学学报（自然科学版）》
CAS
北大核心
2013年第1期101-105,共5页
Journal of Henan University:Natural Science
基金
浙江省建设科技科研和推广项目(08Z008)
关键词
地铁
盾构隧道
地面沉降
监测
玻尔兹曼函数
metro
shield tunnel
ground surface settlement
monitoring
Boltzmann function
