高填方黄土地基变形规律及稳定性  

Deformation Law and Stability of High-filled Loess Foundation

作　　者：刘伟 徐捷 蒋浩 王劲 王永鑫[2] 

机构地区：[1]西安长庆科技工程有限责任公司,西安710021 [2]西安科技大学建筑与土木工程学院,西安710054

出　　处：《科学技术与工程》2017年第22期295-300,共6页Science Technology and Engineering

摘　　要：高填方地基的变形及稳定性已成为工程建设过程中的一个难点问题。通过对原状土体和重塑土体在不同条件下的压缩试验,分析其变形规律及机制。研究了高填方下覆原地基和填筑地基的稳定性,主要得到以下结论:加荷增量的减小,提高了原状土体的压缩性;含水率的增大会弱化高填方地基下覆土的结构强度使其压缩模量降低;在填筑前期含水率较大的填筑土压缩模量会更小,且随着加荷等级的增加,变化趋势逐渐减弱;E-K曲线较符合对数函数形式;减小分层填筑高度和选择合适的压实度都能够有效地提高高填方地基的长期稳定性。所得结论为相似高填方地基的设计、施工提供了有益的参考。The deformation and stability of the high embankment have become a difficult problem in the engineering construction process.The deformation of undisturbed soils and remolded soils under different conditions are analyzed,and the stability of high-filled underfill and filled foundation are studied.The main conclusions are as follows.The increase of water content will weaken the structural strength of the soil under the high-fill foundation to reduce the compressive modulus;in the early filling stage,the water content is higher（wet）,the compressive modulus of filling soil will be smaller,and the trend will be weakened with the increase of the loading level.The E-K curve is in the form of logarithmic function;it is effective to reduce the height of stratified filling and select the appropriate compaction degree to improve the long-term stability of high-filled soils.The obtained conclusions provide useful references for the design and construction of similar high-fill foundation.

关 键 词：高填方 填筑地基 下覆地基 固结变形 稳定性 指数模型 

分 类 号：TU411.3[建筑科学—岩土工程]