摘要
针对杨林船闸原状淤泥质土,进行一维压缩试验,研究一次加荷和多次加荷试验下的固结特性。结合典型路基断面,运用ABAQUS软件建立时间硬化蠕变模型和D-P弹塑性模型,得到不同填料顺序下杨林船闸附近高速公路路基工后沉降。试验表明,多次加荷试验下,主、次固结的分界点时间变大,即多次加荷试验主固结完成时间大于一次加荷试验主固结完成时间。模拟结果显示,未考虑蠕变情况下路基沉降量小于考虑蠕变情况下路基沉降量。把蠕变考虑进来时一次填料计算的沉降量大于多次填料计算的沉降量,同时也验证了多次加荷可有效降低次固结沉降。
A series of one-dimensional compression tests were carried out under different loading processes of Yanglin shiplock.Different consolidation loading steps were studied.The time-hardening creep model and extended D-P model were used to obtain the subgrade settlement after construction in different loading methods and the subgrade was taken from the highway near Yanglin shiplock.The results show that under the multistage loading test,the time between the main and secondary consolidation points is larger,which indicates that the completion time of the main consolidation is higher than that of the first loading test.Simulation results show that the subgrade settlement without considering the creep situation is smaller than that with considering the creep situation.In the case of considering the creep situation,the settlement of the single loading is greater than the multi-stage loading.The correction of multi-stage loading for reducing subsidence settlement is verified.
作者
王远航
张福海
周天宝
左庆松
WANG Yuanhang;ZHANG Fuhai;ZHOU Tianba;ZUO Qingsong(Key laboratory of Ministry of Education of Geomechanics and Embankment Engineering, Hohai University, Nanjing, Jiangsu 210098, China;Jiangsu Research Center for Geomechanical Engineering Technology, Hohai University, Nanjing, Jiangsu 210098, China;CCRC CONSTRUCTION ENGRG.CO, LTG Beijing 100078)
出处
《河北工程大学学报（自然科学版）》
CAS
2018年第4期51-54,69,共5页
Journal of Hebei University of Engineering:Natural Science Edition
基金
国家自然科学基金资助项目(51778211)
江苏省自然科学基金资助项目(BK20171434)
关键词
淤泥质土
一维压缩
时间硬化蠕变模型
次固结
路基沉降
mucky soil
one-dimensional compression
time-hardening creep model
secondary consolidation
subgrade settlement
