组合工字形砌块内河航道护岸的现场试验  

Field tests of combined I-shaped masonry in inland waterway revetment

作　　者：时秀莲 吴跃东[1,2] 刘坚[1,2,3] 徐楠[1,2] SHI Xiulian;WU Yuedong;LIU Jian;XU Nan(Key Laboratory of Ministry of Education for Geomechanics and Embankment Engineering, Hohai University, Nanjing 210098, China;Geotechnical Research Institute, Hohai University, Nanjing 210098, China;Engineering Research Center of Dredging Technology of Ministry of Education, Hohai University, Nanjing 210098, China)

机构地区：[1]河海大学岩土力学与堤防工程教育部重点实验室,江苏南京210098 [2]河海大学岩土工程科学研究所,江苏南京210098 [3]河海大学疏浚技术教育部工程研究中心,江苏南京210098

出　　处：《南京工业大学学报（自然科学版）》2020年第6期771-779,共9页Journal of Nanjing Tech University(Natural Science Edition)

基　　金：中央高校基本科研业务费(2019B73814,B200204036);江苏省研究生科研与实践创新计划(SJKY190449)。

摘　　要：为研究组合工字形砌体挡墙在内河航道中的适用性,结合浙江省杭平申线航道改建升级项目,开展现场试验,对单层和双层砌体挡墙的地下水位、土压力、沉降、深层水平位移以及单层砌体挡墙的土工格栅应力进行监测。结果表明:组合工字形砌体挡墙的生态功能、受力性能良好;单层砌体挡墙中,水平土压力的实测值在静止土压力和朗肯主动土压力之间,土压力系数随埋深呈现不规则变化;土工格栅应变值最大为1.1%;对比单层和双层砌体挡墙,水平土压力呈多段折线变化,并互有交叉,当埋深较小时,单层砌体挡墙的水平土压力数值较大,单层砌体挡墙的土工格栅拉筋发挥了与双层砌块相同的作用;单层和双层砌体挡墙的水平位移变化规律相同,双层砌体挡墙的土体沉降和墙身沉降都比单层的更大。In order to study the applicability of the combined I-shaped masonry retaining wall in the inland waterway,based on the reconstruction and upgrading project of Hang-Ping-Shen Waterway in Zhejiang Province,the ground water level,earth pressure,settlement and deep horizontal displacement of single-layer and double-layer masonry retaining walls were monitored,and the geogrid stress of the single-layer masonry retaining wall was also monitored by field tests.Results showed that the combined I-shaped masonry retaining wall had good ecological function and mechanical performance.In the single-layer masonry retaining wall,the measured value of horizontal earth pressure was between the static earth pressure and the Rankine active earth pressure.The earth pressure coefficient exhibited irregular changes varying with the buried depth.The maximum strain value of the geogrid was 1.1%.The horizontal earth pressure changed in multiple segments and the data crossed each other when comparing with single-layer and double-layer masonry retaining walls.When the buried depth was small,the horizontal earth pressure of single-layer retaining wall was larger.The grid lacing played the same role as the double-layer masonry.The horizontal displacement changes of the single-layer and the double-layer masonry retaining walls were the same,and the soil settlement and wall settlement of the double-layer were larger than that of the single-layer.

关 键 词：组合工字形护岸 内河航道 现场试验 土压力 砌体挡墙 

分 类 号：TQ028.8[化学工程]