软土基床系数三轴试验法测定及分析
PDF下载 (297)张春进,陈斌,姚燕明,叶荣华.软土基床系数三轴试验法测定及分析[J].宁波大学学报(理工版),2016,29(1):108-112.DOI:
ZHANG Chun-jin,CHEN Bin,YAO Yan-ming,YE Rong-hua.<span style="FONT-SIZE: 10.5pt; FONT-FAMILY: "Times New Roman"">Experiment and Analysis on Subgrade Coefficient of Soft Soil Using Triaxial Test Method[J].Journal of Ningbo University(Natural Science & Engineering Edition),2016,29(1):108-112.DOI:
| Title: | <span style="FONT-SIZE: 10.5pt; FONT-FAMILY: "Times New Roman"">Experiment and Analysis on Subgrade Coefficient of Soft Soil Using Triaxial Test Method |
| 作者: | 张春进, 陈斌, 姚燕明, 叶荣华 |
| Author(s): | ZHANG Chun-jin, CHEN Bin, YAO Yan-ming, YE Rong-hua |
| 关键词: | 软土 ; 基床系数; 相关性; 尺寸效应 |
| Keywords: | soft clay; coefficient of subgrade reaction; correlation; size effect |
| 分类号: | A |
| 文献标识码: | A |
| 摘要: | 针对宁波轨道交通软土地层 <span style="FONT-SIZE: 10.5pt; FONT-FAMILY: "Times New Roman"">, 采用三轴试验法得到各土层的基床系数 <span style="FONT-SIZE: 10.5pt; FONT-FAMILY: "Times New Roman"">, 并对水平基床系数和垂直基床系数进行相关性分析 <span style="FONT-SIZE: 10.5pt; FONT-FAMILY: "Times New Roman"">, 最后对试验结果进行尺寸效应修正 <span style="FONT-SIZE: 10.5pt; FONT-FAMILY: "Times New Roman"">. 结果表明 <span style="FONT-SIZE: 10.5pt; FONT-FAMILY: "Times New Roman"">: 各土层基床系数差异较大 <span style="FONT-SIZE: 10.5pt; FONT-FAMILY: "Times New Roman"">, 淤泥质土的水平基床系数 <span style="FONT-SIZE: 10.5pt; FONT-FAMILY: "Times New Roman"">K <span style="FONT-SIZE: 10.5pt; FONT-FAMILY: "Times New Roman"">h 较小 <span style="FONT-SIZE: 10.5pt; FONT-FAMILY: "Times New Roman"">, 黏性土水平基床系数 <span style="FONT-SIZE: 10.5pt; FONT-FAMILY: "Times New Roman"">K <span style="FONT-SIZE: 10.5pt; FONT-FAMILY: "Times New Roman"">h 较大 <span style="FONT-SIZE: 10.5pt; FONT-FAMILY: "Times New Roman"">; 水平与垂直基床系数较为接近 <span style="FONT-SIZE: 10.5pt; FONT-FAMILY: "Times New Roman"">, 且相关性较好 <span style="FONT-SIZE: 10.5pt; FONT-FAMILY: "Times New Roman"">; 土层基床系数的修 正值与经验值吻合较好 <span style="FONT-SIZE: 10.5pt; FONT-FAMILY: "Times New Roman"">, 从而验证了适用于宁波软土基床系数试验值修正系数的合理性 <span style="FONT-SIZE: 10.5pt; FONT-FAMILY: "Times New Roman"">, 为轨道交通工程设计和施工提供了理论依据 <span style="FONT-SIZE: 10.5pt; FONT-FAMILY: "Times New Roman"">. |
| Abstract: | Coefficient of subgrade reaction is an important parameter in rail transportation design. Experiment to determine the coefficient of subgrade reaction of soft soil stratum in Ningbo urban rail transit is carried out using triaxial method (CD), then the correlation analysis is conducted on the horizontal and vertical directions of coefficient of subgrade reaction. Finally, the size effect of the test result is corrected. The results show that coefficient of subgrade reaction on Ningbo soft soil varies significantly. The horizontal direction of coefficient of subgrade reaction of silty clay is small, while it is relatively large for the cohesive soil. The horizontal direction of coefficient of subgrade reaction is close to the vertical direction, and they have a certain correlation, that is, to a certain extent, the vertical direction can be converted to the horizontal direction of coefficient of subgrade reaction. The correction value of coefficient of subgrade reaction of soil is in good agreement with the empirical value, verifying the correction coefficient of test value. The coefficient of subgrade reaction proves to be reasonable in Ningbo area. The analysis provides a theoretical basis for engineering design and construction of rail transit |
| 参考文献 /References: | [1].彭友君. 地铁设计中基床系数的解决方案[J]. 都市快轨交通, 2007, 20(2):40-43. [2].吴云刚, 黄斌, 张婷, 等. 基床系数室内成果修正及评价[J]. 水运工程, 2010(7):27-30. [3].黄昌乾, 李国强, 潘启辉. 基床系数取值方法相关问题分析[J]. 建筑结构, 2010, 40(增刊):298-302. [4].夏熊波, 陈定安, 王小章, 等. 关于室内基床系数试验的新方法[J]. 资源环境与工程, 2009, 23(4):486-487. [5].张蕾, 高广运, 高盟. 基床系数确定方法的讨论[J]. 地下空间与工程学报, 2011, 7(4):812-818. [6].陈定安, 茅加峰. 室内基床系数测试方法研究[J]. 岩土工程学报, 2011, 33(2):281-28 Experiment and Analysis on Subgrade Coefficient of Soft Soil Using Triaxial Test Method [7].ZHANG Chun-jin, CHEN Bin, YAO Yan-ming, YE Rong-hua [8].( Ningbo Urban Rail Transit Project Construction Headquarters, Ningbo 315010, China ) [9].Abstract: Coefficient of subgrade reaction is an important parameter in rail transportation design. Experiment to determine the coefficient of subgrade reaction of soft soil stratum in Ningbo urban rail transit is carried out using triaxial method (CD), then the correlation analysis is conducted on the horizontal and vertical directions of coefficient of subgrade reaction. Finally, the size effect of the test result is corrected. The results show that coefficient of subgrade reaction on Ningbo soft soil varies significantly. The horizontal direction of coefficient of subgrade reaction of silty clay is small, while it is relatively large for the cohesive soil. The horizontal direction of coefficient of subgrade reaction is close to the vertical direction, and they have a certain correlation, that is, to a certain extent, the vertical direction can be converted to the horizontal direction of coefficient of subgrade reaction. The correction value of coefficient of subgrade reaction of soil is in good agreement with the empirical value, verifying the correction coefficient of test value. The coefficient of subgrade reaction proves to be reasonable in Ningbo area. The analysis provides a theoretical basis for engineering design and construction of rail transit. |
| 备注/Memo: | 收稿日期: 2015?03?26. 宁波大学学报（理工版）网址http://journallg.nbu.edu.cn/基金项目: 宁波市科技计划项目2013C50005） 宁波大学学报（理工版）网址：http://journallg.nbu.edu.cn/ |
