上海地区软土次固结特性试验研究  

EXPERIMENTAL STUDY ON SECONDARY CONSOLIDATION OF SOFT SOIL IN SHANGHAI AREA

作　　者：朱墩 ZHU Dun(Shanghai Municipal Engineering Design Institute(Group)Co.,Ltd.,Shanghai 200092,China)

机构地区：[1]上海市政工程设计研究总院(集团)有限公司,上海200092

出　　处：《低温建筑技术》2020年第9期88-92,共5页Low Temperature Architecture Technology

基　　金：国家自然科学基金(41702294)。

摘　　要：软土路基的主、次固结作用对路面的沉降有着重要的影响,但目前上海地区软土的次固结特性研究仍较少。因此文中以上海地区软土为研究对象,开展了20组固结试验,研究含水率、孔隙比和固结时间等因素对次固结特性的影响以及其时间效应。研究结果显示,上海地区软土的次固结系数随含水率、孔隙比的增加呈现出增大的趋势,随固结时间的增大呈现出减小的趋势;且上海地区软土的次固结系数具有明显的时间效应,随着时间的增加次固结系数不断增大,但增速逐渐减小,最终趋于稳定。文中试验结果可为上海地区的工程建设提供参考。The consolidation and secondary consolidation of soft soil roadbeds have a crucial effect on the settlement of pavement.However,the research on the secondary consolidation characteristics of soft soil in Shanghai area is still inadequate.Thus,water content,pore ratio,the secondary consolidation characteristics and time effect are studied via 20 group consolidation test of soft soil in Shanghai area in this paper.The test results show that the secondary consolidation coefficient of soft soil in Shanghai area increases with the moisture content and the void ratio,but decreases with the consolidation time;Moreover,secondary settlement coefficient of soft soil in Shanghai area has obvious time effect.As the time increases,the secondary consolidation coefficient continues to increase,but the growth rate gradually decreases and eventually stabilizes.Present study devoted to provide vital reference value for engineering construction in Shanghai area.

关 键 词：上海地区软土 次固结系数 含水率 固结时间 

分 类 号：TU411.5[建筑科学—岩土工程]