杭州庆春路过江隧道运营期沉降研究  

Longitudinal settlement analysis of Hangzhou Qingchun cross-river tunnel during operational periods

作　　者：徐长节[1] 孙凤明[1] 林刚[2] 

机构地区：[1]浙江大学滨海和城市岩土工程研究中心,浙江杭州310058 [2]浙江大学福世德勘测设计有限公司,浙江杭州310013

出　　处：《中南大学学报（自然科学版）》2014年第9期3219-3226,共8页Journal of Central South University:Science and Technology

基　　金：国家自然科学基金资助项目(51278449;51238009;51338009)

摘　　要：隧道运营期内的沉降主要由地基在循环动载下塑性应变累积和下卧层土体固结组成,本文运用经验公式、规范方法、数值计算等不同的方法研究杭州庆春路过江隧道不同部分的沉降量。首先参照有关桥隧设计规范确定隧道交通动荷载的大小以及作用数,然后利用有关经验公式计算得到隧道塑性累计沉降量,最后采用规范推荐的分层总和法以及plaxis有限元软件2种不同的方法计算由于土体固结产生的沉降量。研究结果表明:计算所得的隧道总沉降量随时间变化趋势不仅与现场实测数据相吻合,而且也间接证明该隧道能够确保在运营期内正常运营。Besides the deformation of the consolidation of soil layers beneath the tunnel, settlement of the tunnel during its operational period also accumulates because of the cyclic traffic loading acting on the ground. A comprehensive analysis of the longitudinal settlement of the Hangzhou Qingchun Road Cross-River Tunnel was presented. A calculation method combining an empirical method and a numerical analysis was proposed. The magnitude and number of traffic load cycles were obtained from the design recommendations. An empirical method was then applied to determine the plastic accumulative settlement of the tunnel. Consolidation settlement was calculated according to the design recommendations and using Plaxis. The results show that the tunnel settlement predicted that using the above procedure is in fairly good agreement with the field monitoring data.

关 键 词：过江隧道 交通荷载 塑性累计 固结沉降 

分 类 号：TU478[建筑科学—结构工程]