
第38卷第2期 2016年4月
土木建筑与环境工程
Journal of Civil,Architectural &. Environmental Engineering
do1:10.11835/1.1ssn.16744764.2016.02.003
初始于密度对天然砂砾改良红粘土回弹
模量的影响及预估模型
杨俊,刘世宜,张国栋
Vol.38 No. 2 Apr.2016
可器
(三峡大学三埃地区地质灾害与生态环境湖北省协同创新中心;土木与建筑学院,湖北宜443002)摘要:以掺天然砂砾改良的红粘土为研究对象,采用室内承载板法测定回弹模量,通过不同初始千密度下的回弹模量试验,深入研究了天然砂砾改良红粘土的回弹模量随初始千密度的变化规律,建立了不同初始千密度下回弹模量的预估模型。试验结果表明:在同一天然砂砾掺量下,随着初始千密度的提高,红粘土的回弹模量逐渐增大。当初始千密度由低向最大千密度增大时,回弹模量增长速度较快,当初始千密度超过最大千密度继续增大时,回弹模量增长速度变缓;在同一初始千密度下,当天然砂砾掺量从0增至30%时,回弹模量的增长幅度较小,当天然砂砾掺量超过30%而继续增长时,回弹模量增长幅度较大;初始干密度由1.6g·cm-3增长至2.0g·cm-3时,回弹模量增长值随天然砂砾掺量的增加而逐渐增大。分别建立了回弹模量随初始千密度及天然砂砾掺量变化的预估模型,通过补充试验,验证了预估模型的准确性。
关键词:红粘土;天然砂砾;初始千密度;回弹模量;预估模型
中图分类号:TU411.3
文献标志码:A
文章编号:1674-4764(2016)03-0021-07
Impactandpredictionmodelofinitialdrydensityon
resilientmodulus ofgravel soilred clay
Yang Jun,LiuShiyi,Zhang Guodong
(Collaborative Innovation Center of Geological Hazards and Ecological Environment in Three Gorges Area in Hubei
Province; Civil and Architectural Institute, Three Gorges University, Yichang 4430o2, Hubei, P. R. China)
Abstract : The gravel soil red clay was used to in resilient modulus test under the condition of different initial dry density and the the resilient modulus variation was studied. The prediction model of resilient modulus was established. The test results show that: (1) With the same gravel soil content, when the initial dry density increases,the resilient modulus of red clay increases. When the initial dry density increases from low to maximum dry density, resilient modulus grow faster and when the initial dry density increased after exceeding the maximum dry density, esilient modulus grow slower ; (2) With the same initial dry density,
收稿日期:2015-10-15
基金项目:湖北省公路管理局2013年自然科学研究项目(D2013003)
作者简介:杨俊(1976-),男,博士,副教授,主要从事道路特殊土路基处理道路新材料开发与利用、建筑垃圾及工业垃圾
的路用性能研究,(E-mail)Wangjing750301@163.com
Received: 2015-10-15
Foundation item: Natural Science Foundation Supported by Highway Administration of Hubei Province in 2o13 (No.
D2013003)
Author brief: Yang Jun (1976-), assistant professor, main interests: road special roadbed treatment, development and
utilization of new road materials, construction waste and industrial waste road performance, (E-mail) Wangjing750301@163, com