淮河入江水道崇湾段特殊软土重塑土压缩特性.pdfVIP

第 38 卷第2 期 三峡大学学报(自然科学版) Vo l. 38 No.2 2016 年 4 月 1 of China Three Gorges Univ. (Natural Sciences) Apr. 2016 DOI:I0.13393/i. cnki. issn.1672-948X. 2016. 02. 006 淮河入江水道崇湾段特殊软土重塑土压缩特性 姜爽1 黄晓波I 王乔2 (1.北京泰斯特工程检测有限公司，北京 102600; 2. 东南大学交通学院，南京 210096) 摘要:为研究针对淮河入江水道崇湾段堤坝下覆主要问题土层的物理力学特性，对其开展了物理、 力学试验研究.确定了崇湾段软土属于有机质土且具有一定膨胀性的特殊性状.通过不同初始含 水率的一维压缩试验得到崇湾段软土重塑土的压缩特性.与非有机质重塑土的压缩特性进行比 较，明确相同 eo / eL 条件下崇湾段特殊软土具有更大的压缩性，且有机质含量较高的土体压缩性更 大.通过引入 Hong 提出的重塑屈服压力，确定了崇湾段特殊软土重塑土的抗变形能力.相同初始 含水率条件下崇湾段特殊软土的重塑屈服压力较非有机质土更大，且有机质含量较高时重塑屈服 压力更大.明确了崇湾段软土的重塑屈服压力可以用 Hong(2010) 提出的经验公式进行预测. 关键词:淮河入江水道; 软土; 压缩特性; 有机质 中图分类号:TU411 文献标识码:A 文章编号: 1672-948X (2016) 02-0024-05 Compression Behavior of Soft Clays at Chongwan Section of Huaihe-Changjiang Waterway 1 1 2 Jiang Shuang Huang Xiaobo Wang Qiao (1. Beijing Taisite Engineering Testing Co. , Ltd. , Beijing 102600 , China; 2. School of Transportation , Southeast Univ. , Nanjing 210096 , China) Abstract A series of physico-mechanical tests were carried out on the bad soils of Chongwan section of H ua- ihe-Changjiang waterway to detect its physico-mechanical properties. The results indicate that the soils in Chongwan section have special physical characteristics with high organic content and a ccrtain of expansibili ty. Through oedometer tests with various initial water contents on remoulded Chongwan soil , the compres- sion characteristics of remoulded Chongwan soil were studied. Comparing with remoulded nonorganic soil , it is detected that the compressibility of