饱和软土地基固结沉降的现场测试  

Spot test of consolidation settlement of soft clay foundation

作　　者：李又云[1] 刘保健[1] 谢永利[1] 

机构地区：[1]长安大学特殊地区公路工程教育部重点实验室,陕西西安710064

出　　处：《长安大学学报（自然科学版）》2006年第6期1-5,共5页Journal of Chang’an University(Natural Science Edition)

基　　金：国家西部交通建设科技项目(200131800019)

摘　　要：工后沉降与差异沉降是影响公路工程质量的关键。为加快施工期及预压固结期间的沉降速度,减小工后沉降,对四川达州-重庆高速公路软土地基进行了塑料排水板预压固结处理,并利用沉降探头、沉降杯对其进行了沉降观测,得到软基沉降变形的规律;同时通过孔压探头对其进行了现场孔隙水压力消散测试,得到孔隙水压力发展变化的规律。测试结果表明:该方案能有效地加快软基的沉降速率,缩短预压时间,加快施工进度,减小工后沉降变形与差异沉降。The settlement transformation and difference settlement are the key factors that affects the highway engineering quantity. In order to speed the settlement of foundation during the construction and reduce the settlement after construction, the soft clay foundation of Dazhou—Chongqing freeway is treated with plastic drain straps. The settlement is observed and the rule of settlement is gained. At the same time the pore-pressing is observed and the rule of pore-pressing is found. The test result expresses that this method can speed the settlement velocity, shorten the time of prepressing, expedite the construction velocity and reduce settlement transformation and difference settlement. 4 tabs, 12 figs, 9 refs.

关 键 词：道路工程 软土地基 塑料排水板 沉降速率 差异沉降 

分 类 号：U416.1[交通运输工程—道路与铁道工程]