摘要
本文针对"V"形沟谷中的黄土高填方沉降问题,进行了两种沟谷类型的离心模型试验,研究不同边界(柔性和刚性)效应下的施工期和工后沉降。同时,进行了离心状态下的增湿模拟试验,就不同边界条件下填筑体增湿沉降规律进行了初步探讨。试验结果表明,黄土高填方土体的沉降和变形与边界条件密切相关,填筑体自身沉降在"柔性"和"刚性"两种沟谷地基模型中存在明显差异。由于两种沟谷地基的约束能力不同,使得地基模量的变化对于"V"形沟谷中填筑体各阶段沉降(施工期沉降、工后沉降、湿化沉降)存在显著影响。
This paper focuses on the loess high-filled settlement in V-shaped valley. Centrifugal modelingtechnique with two valley models was employed to consider different boundary(flexible and rigid) effectsduring construction and post-construction settlement. Meanwhile,precipitation was also simulated,and thesettlements of filled soil during moistening process were observed.The rule of loess filled body moistening de-formation under different boundary conditions was discussed. The results indicate,the settlement and defor-mation of loess high-filled soil are closely related to the boundary conditions. There are significant differenc-es between the soft and rigid valleys. The change of foundation modulus has a significant effect on thefilled soil settlement(construction period, long-term settlement, moistening settlement, etc.) in the V-shaped valley,due to the different constraint degree of the original valley foundation.
出处
《中国水利水电科学研究院学报》
北大核心
2017年第4期256-262,共7页
Journal of China Institute of Water Resources and Hydropower Research
基金
基金项目:黄土丘陵沟壑区(延安新区)工程建设关键技术研究与示范(2013BAJ06B00)
黄土地区造地工程水环境控制关键技术研究(2016KTZDSF03-02)
研发治沟造地工程地质与土壤湿陷稳定技术与标准(2017YFD0800501)
地铁隧道地震响应的动力离心模型试验和简化分析方法(CKSF2017012/YT)
深厚淤泥爆破挤淤作用机理及设计方法研究(2016GY19)
关键词
离心模型试验
高填方工程
黄土
沉降变形
边界条件
centrifugal model test
high-fill embankment
loess
settlement and deformation
boundary condition
