•  
  •  
 

Abstract

To investigate the design and construction of wet subgrade in southern China, this paper selected three typical soil samples of the new highway subgrade of Ecological Avenue in Chongming District, Shanghai, and improved the samples by cement disposal technology. Meanwhile, the effects of the water content, degree of compaction, cement content, age of maintenance and stress state on the dynamic resilient modulus were analyzed by experimental methods. The results show that the effects of cement content, water content and age of maintenance on the dynamic resilient modulus of three kinds of cement-improved fine-grained soil in wet subgrade are larger, and more cement content and age of maintenance don’t necessarily lead to better effect. Additionally, the influence of the degree of compaction on the dynamic resilient modulus is not significant. Considering the significant effect of the stress state, it is recommended that the dynamic resilience modulus should be set at a conservative value in the design of wet fine-grained soil subgrade.

Publication Date

9-14-2023

DOI

10.14048/j.issn.1671-2579.2023.04.004

First Page

18

Last Page

23

Submission Date

March 2025

Reference

[1] 张翛, 赵队家, 刘少文, 等. 美国路基土回弹模量确定方法研究现状[J]. 重庆交通大学学报(自然科学版), 2012, 31(4): 795-798. ZHANG Xiao, ZHAO Duijia, LIU Shaowen, et al. Research progress on determination of resilient modulus of subgrade soils in U.S[J]. Journal of Chongqing Jiaotong University (Natural Science), 2012, 31(4): 795-798. [2] 马士杰. 粒料基层设计方法与永久变形控制指标研究[D]. 南京: 东南大学, 2015. MA Shijie. Study on design method and permanent deformation control index of granular base[D]. Nanjing: Southeast University, 2015. [3] ZHANG J H, GU F, ZHANG Y Q. Use of building-related construction and demolition wastes in highway embankment: laboratory and field evaluations[J]. Journal of Cleaner Production, 2019, 230: 1051-1060. [4] 凌建明, 苏华才, 谢华昌, 等. 路基土动态回弹模量的试验研究[J]. 地下空间与工程学报, 2010, 6(5): 919-925. LING Jianming, SU Huacai, XIE Huachang, et al. Laboratory research on dynamic resilient modulus of subgrade soil[J]. Chinese Journal of Underground Space and Engineering, 2010, 6(5): 919-925. [5] 张军辉, 彭俊辉, 郑健龙. 路基土动态回弹模量预估进展与展望[J]. 中国公路学报, 2020, 33(1): 1-13. ZHANG Junhui, PENG Junhui, ZHENG Jianlong. Progress and prospect of the prediction model of the resilient modulus of subgrade soils[J]. China Journal of Highway and Transport, 2020, 33(1): 1-13. [6] 中华人民共和国交通运输部. 公路路基设计规范: JTG D30—2015[S]. 北京: 人民交通出版社, 2015. Specifications for Design of Highway Subgrades: JTG D30—2015[S]. Beijing: China Communications Press, 2015. [7] 张世洲.基于非饱和土力学的路基土回弹模量预估模型[D].上海:同济大学,2007. ZHANG Shizhou. Rebound modulus prediction model of roadbed soil based on unsaturated soil mechanics[D]. Shanghai:Tongji University,2007. [8] 张登良, 许永明, 沙爱民. 石灰、粉煤灰稳定土的早强试验研究[J]. 粉煤灰综合利用, 1995, 9(1): 17-24. ZHANG Dengliang, XU Yongming, SHA Aimin. Experimental research on early strength of lime and flyash stabilized soil[J]. Fly Ash Comprehensive Utilization, 1995, 9(1): 17-24. [9] 凌天清, 梁富权. 水泥稳定土抗弯拉强度结构系数的研究[J]. 中国公路学报, 1992, 5(3): 7-13. LING Tianqing, LIANG Fuquan. Study on safety factor for flexural fatigue of cement stabilized soil[J]. China Journal of Highway and Transport, 1992, 5(3): 7-13. [10] 陈声凯, 凌建明, 张世洲. 路基土动态回弹模量室内试验加载序列的确定[J]. 公路, 2006, 51(11): 148-152. CHEN Shengkai, LING Jianming, ZHANG Shizhou. Fixing loading sequence for resilient modulus test of subgrade soil[J]. Highway, 2006, 51(11): 148-152. [11] 凌建明, 陈声凯, 曹长伟. 路基土回弹模量影响因素分析[J]. 建筑材料学报, 2007, 10(4): 446-451. LING Jianming, CHEN Shengkai, CAO Changwei. Analysis of influence factors on resilient modulus of subgrade soils[J]. Journal of Building Materials, 2007, 10(4): 446-451. [12] 杨彦军.黏土路基动态回弹模量的演变规律与模型预估[D].上海:同济大学,2012. YANG Yanjun. Evolution law and model prediction of dynamic resilience modulus of clay roadbase[D]. Shanghai:Tongji University,2012. [13] 罗志刚.路基与粒料层动态模量参数研究[R].上海:同济大学,2007. LUO Zhigang. Research on dynamic modulus parameters of roadbed and granular layer [R]. Shanghai:Tongji University,2007.

Download

Share

COinS