摘要
基于等应变理论,结合Newman-Carrilo方程,利用分离变量法,提出增压式真空预压处理单层均质土地基固结度解析解,并得到无井阻和理想井的固结度解析解;编制了便于工程实践的图表。结果表明:通过增压式真空预压处理单层均质土时,随着时间因子的增加,固结度总体呈快速增长趋势;随着井径比n的增加,固结速率减小;理想井固结与无井阻固结的变化规律基本一致,但同一时刻理想井的固结度略大。采用增压式真空预压处理时,建议排水板的井径比不超过10。
Based on the assumption of equal strain of soil, combined with Newman-Carroll equation and the method of separation of variables, the analytical solution of consolidation of single-layer homogeneous soil foundation with air-boosted vacuum preloading was proposed in this paper, and the theoretical solution of consolidation without well resistance and ideal well was given. At last, the chart convenient for engineering practice was put forward. The results show that with the increase of T_h, the consolidation degree grows rapidly under the treatment of the single layer homogeneous soil by air-boosted vacuum preloading. The consolidation rate decreases with the increase of the well diameter ratio n. The change law of ideal well consolidation and no-well resistance consolidation is basically the same, but at the same time the degree of consolidation value of ideal well is slightly higher. When air-boosted vacuum preloading treatment is used, it is recommended that the well diameter ratio should not exceed 10 when drain boards are installed.
作者
沈宇鹏
王云超
董淑海
金亚伟
王亚琼
SHEN Yupeng;WANG Yunchao;DONG Shuhai;JIN Yawei;WANG Yaqiong(School of Civil Engineering, Beijing Jiaotong University, Beijing 100044,China;Beijing Engineering and Technology Research Center of Rail Transit Line Safetyand Disaster Prevention, Beijing Jiaotong University, Beijing 100044, China;Beijing General Municipal Engineering Design & Research Institute Co., Ltd., Beijing 100082, China;CCCC Third Harbor Consultants Co., Ltd., Shanghai 200032, China;Jiangsu Xintai Geotechnical Technology Co., Ltd., Wuxi 214267, China;Key Laboratory for Highway Bridge and Tunnel Engineering of Shaanxi Province, Chang’an University, Xi’an 710064, China)
出处
《铁道学报》
EI
CAS
CSCD
北大核心
2019年第4期118-124,共7页
Journal of the China Railway Society
基金
澳门特别行政区科学技术发展基金(0010/2018/A)
国家自然科学基金(41772330)
中央高校基本科研业务费专项资金(300102218505)
关键词
增压式真空预压
分离变量法
固结理论
解析解
air-boosted vacuum preloading
method of separation of variables
consolidation theory
theoretical solution
