摘要
采用有限差分软件FLAC3D对吹填土中设置夹砂层进行数值模拟,研究了夹砂层对吹填土固结沉降的作用机理,结果表明夹砂层在吹填土中形成了水平向排水通道,可以提高吹填土在真空预压时的固结速度,增加固结沉降量,同时提出在夹砂层上下表面设置土工布的处理方法,有助于夹砂层在吹填土中的稳定成形,并起到限制吹填土不均匀沉降的作用。
Through the numerical simulation of the sand-layer in the dredgerfill by the finite difference software＇s Flac3D, mechanism of the sand-layer in the consolidation process was studied, and the results showed that the horizontal drainage channel could accelerate the consolidation process and in- crease the settlement of the dredger fill by the setting of the sand-layer through the vacuum preloading. Meanwhile, a construction technology was proposed that geotechnical fabrics were used on the top and bottom surface of the sand-layer, which contributed to keeping the formation of the sand-layer and controlling the differential settlement in the dredger fill.
出处
《土木工程与管理学报》
2012年第3期91-93,共3页
Journal of Civil Engineering and Management
关键词
吹填土
夹砂层
真空预压
固结沉降
数值模拟
dredger fill
sand-layer
vacuum preload
consolidation
numerical simulation
