浸水斜坡软基沉降演化规律分析  

Analysis on Evolution Law of Soft Foundation Settlement in Flooded Slope

作　　者：郭锦霞 赵国智 Guo Jinxia;Zhao Guozhi(Shanxi Provincial Water Conservancy Construction Engineering Bureau Co.,Ltd.,Taiyuan 030006,Shanxi)

机构地区：[1]山西省水利建筑工程局有限公司,山西太原030006

出　　处：《陕西水利》2022年第6期4-6,共3页Shaanxi Water Resources

摘　　要：路基不均匀沉降通常会导致路面纵横向开裂、路基失稳等病害,在工程建设中越来越受到研究者的关注。通过有限元数值模拟,分析了浸水斜坡软基面、坡脚点、上部结构及填筑关键点随填筑高度的演化规律。研究结果表明:(1)浸水斜坡软基面沉降随填筑高度增加而增大,且受斜坡影响两侧坡脚点差异沉降明显。(2)浸水斜坡软基上部结构沉降随填筑高度增加而增大,施工期沉降速率及沉降量均明显大于工后。(3)浸水斜坡软基上路面最大沉降中心受斜坡影响向左(坡底侧)偏移。浸水斜坡软基沉降分布规律明显不同于平坦地基,实际工程设计中应予以重视。Uneven settlement of subgrade usually leads to vertical and horizontal cracking of pavement,instability of subgrade and other diseases,which attract more and more attention of researchers in engineering construction.Through finite element numerical simulation,the evolution law of the soft base surface,toe point,superstructure and key points of filling with the filling height of the flooded slope is analyzed.The research results show that:(1)The settlement of the soft base surface of the flooded slope increases with the increase of the filling height,and the differential settlement of the slope toe points on both sides affected by the slope is obvious.(2)The settlement of the upper structure of the soft foundation of the submerged slope increases with the increase of the filling height,and the settlement rate and settlement amount during the construction period are significantly greater than those after the construction.(3)The maximum settlement center of the pavement on the soft foundation of the flooded slope is shifted to the left(slope bottom side)due to the influence of the slope.The settlement distribution law of soft foundation in flooded slope is obviously different from that of flat foundation,which should be paid attention to in practical engineering design.

关 键 词：浸水斜坡软基 逐级填筑 演化规律 差异沉降 

分 类 号：TU43[建筑科学—岩土工程]