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ID:35191142
大小:2.04 MB
页数:75页
时间:2019-03-21
《基于毛乌素沙漠特殊地基承载力试验研究》由会员上传分享,免费在线阅读,更多相关内容在学术论文-天天文库。
1、分类号:TU410710-20040023壤步太海硕士学位论文毛乌素沙漠特殊地基承载力试验研究导师姓名职称申请学位级别论文提交日期学位授予单位刘倍利折学森教授答辩委员会主席学位论文评阅人王晓谋李晓明摘要我国是一个多沙漠国家,沙漠总面积约为130.0万平方公里,主要分布在我国的西北部。随着西部大开发的不断深入,高等级公路也在不断向沙漠地区延伸。以往技术方法和经验已经不能满足如今高速发展的沙漠公路建设需求。本文以陕蒙沙漠公路为依托工程,针对沙漠特殊地基承载力展开试验研究。(1)首先,对依托工程陕蒙沙漠公路进行详细的工程地质勘察,全面了
2、解陕蒙高速公路地基土的工程特性,得出了不良地基段主要集中在河流阶地和风沙滩地和按有机质含量可分为粉细砂质淤泥地基和有机质粉细砂地基的结论。(2)对陕蒙沙漠公路开展试验段研究。在选取的6个试验段上进行大规模的现场载荷试验研究,对天然地基和不良地基处理后的承载力进行试验研究。总结出了当含泥量小于30.1%时,地基承载力随着含泥量的增大而增大,当含泥量大于30.1%时,地基承载力随着含泥量的增大而减小的结论。经处理后的不良地基都能满足规范要求,而且经压实其承载力提高了16~'26倍。(3)根据沙漠公路软土地基承载力的特性,推导了能考虑固
3、结度的承载力公式、提出了其计算步骤。并与陕蒙沙漠公路试验段实例对比分析,验证了计算公式的准确性。关键词:沙漠,地基承载力,含泥量,固结度AbstractOurcountryismorethanadesertcountry,thedeserttotalareaisapproximately130.1squarekilometers,mainlydistributesin0111"country,snortheastpart.Alongwithwesternbigdevelopmentunceasinglythorough,thefi
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