拉锚式钢板桩护岸结构的土压力现场试验研究  

Field Experiment of Earth Pressure of Tensile Anchor Steel Sheet Pile Revetment Structure

作　　者：郑雨晴 刘军[1,2,3] 张福海[1,2] 宗国营[4] 赵伏田 ZHENG Yuqing;LIU Jun;ZHANG Fuhai;ZONG Guoying;ZHAO Futian(College of Civil and Transportation Engineering,Hohai University,Nanjing 210098,China;Key Laboratory of Ministry of Education for Geo-mechanics and Embankment Engineering,Hohai University,Nanjing 210098,China;Institute of Engineering Safety and Disaster Prevention,Hohai University,Nanjing 210098,China;Lianyungang Water Conservancy Planning and Design Institute Co.Ltd.,Lianyungang 222000,Jiangsu China)

机构地区：[1]河海大学土木与交通学院,南京210098 [2]河海大学岩土力学与堤坝工程教育部重点实验室,南京210098 [3]河海大学安全与防灾工程研究所,南京210098 [4]连云港市水利规划设计院有限公司,江苏连云港222000

出　　处：《河南科学》2020年第9期1419-1424,共6页Henan Science

基　　金：国家自然科学基金(51874118)。

摘　　要：根据苏南运河常州段钢板桩护岸升级工程的实测资料,对钢板桩护岸结构的变位模式、桩侧土压力分布特征及施工过程中迎水侧的土压力计的受力情况进行了研究.研究表明,拉锚式钢板桩表现出绕桩底转动和鼓型变位两种典型的变位模式;两种变位模式的板桩靠岸侧主动土压力分布存在明显差异,前者为土压力值逐渐增大的非线性分布,后者为先增大后减小再增大的R型分布,板桩迎水侧土压力分布规律相同,均呈现先减小后增大的C型分布.整个施工过程中板桩迎水侧土压力表现出三个不同的受力阶段,即板桩打入土体后的动荡期,土体开挖过程中的发展期及施工完成后的稳定期.Based on a large number of measured data for steel sheet pile revetment upgrading project of Changzhou section Sunan canal,the displacement mode of steel sheet pile revetment structure,the rule of earth pressure distribution at both sides of sheet pile and the pressure variation of earth pressure cell near water side during the construction process were studied.The studies show that tensile anchor steel sheet piles appear two typical patterns of rotation around pile bottom and drum deformation.The active earth pressure distribution at bank side of piles with this two displacement modes are obviously different.The active earth pressure distribution of first mode is nonlinear and gradually increased,while the active earth pressure distribution of second mode firstly increases,then decreases and finally increases.The earth pressure distribution near water side of piles with this two displacement modes are similar.During the construction process,the pressure variation of earth pressure cell near water side show three different loading stages,which are turbulent period after piling,growth period during the soil excavation and stable period after the construction completion.

关 键 词：钢板桩 护岸结构 现场试验 变位模式 桩侧土压力 

分 类 号：TV863[水利工程—水利水电工程]