钙质结核土缩尺试验压缩系数修正方法研究  

Study on the compression coefficient modified method of calcareous concretion soils in scale test

作　　者：梁传扬 吴跃东[1,2] 吴回国 林来贺 时秀莲 陈大硕 孙传明 LIANG Chuanyang;WU Yuedong;WU Huiguo;LIN Laihe;SHI Xiulian;CHEN Dashuo;SUN Chuanming(Key Laboratory of Ministry of Education for Geomechanics and Embankment Engineering, Hohai University, Nanjing 210098, China;Geotechnical Research Institute, 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

出　　处：《南京工业大学学报（自然科学版）》2022年第2期207-213,共7页Journal of Nanjing Tech University(Natural Science Edition)

基　　金：江苏省研究生科研与实践创新计划(KYCX19-0419);中央高校基本科研业务费(2019B73814)。

摘　　要：为了研究钙质结核土缩尺试样的压缩特性及其参数的修正方法,本文提出适用于钙质结核土的缩尺方法,并对比分析不同钙质结核质量分数的钙质结核土大型压缩试验和缩尺试验下的压缩性,对缩尺试样的压缩系数进行修正。结果表明:对钙质结核土使用相似级配法混合等质量替代法进行缩尺,可以获得适用于常规试验仪器的钙质结核土试样;在相同的钙质结核质量分数条件下,大型压缩试样压缩性普遍大于缩尺试样压缩性;修正后的压缩系数可以较好地反映钙质结核土的压缩性能,与工程中采用的压缩系数相比,更接近土体的天然性质。In order to study the compression characteristics and coefficient modified method of the scaled calcareous concretion soils,a scale method applicable to calcareous concretion soils was improved.Then,the compression characteristic of calcareous concretion soils with different calcareous concretion contents in large-scale compression test and scale compression test was analyzed,and the compression coefficient of scale calcareous concretion soil samples was modified.Results showed that it was possible to obtain a scale calcareous concretion soil sample by using the similar grading method mixed with the mass equivalent substitution method to scale reduction.The compression coefficient of the sample in the large-scale compression test was generally larger than that in the scale compression test when the calcareous concretion content was the same.The modified compression coefficient was possible to better reflect the compression characteristic of the calcareous concretion soils,which was more similar to the natural compression characteristic of the calcareous concretion soils.

关 键 词：钙质结核土 大型压缩试验 缩尺试验 压缩曲线 压缩系数 

分 类 号：TQ028.0[化学工程]