毛乌素沙漠风积砂力学特性室内试验研究

宋焱勋; 彭建兵; 王治军

毛乌素沙漠风积砂力学特性室内试验研究

宋焱勋^1,2,3,
彭建兵²,
王治军^1,1

1.
长安大学地质工程与测绘学院西安 710054;
2.
国土资源部岩土工程开放研究实验室西安 710054;
3.
西安长庆科技工程有限责任公司西安 710021;
4.
河北省地矿局第一地质大队邯郸 056001

基金项目:

国家自然科学基金面上项目,黄土洞穴成因试验研究(编号:40772182);西安长庆科技工程有限责任公司科技攻关项目,毛乌素沙漠风积砂力学特性深化研究(编号:20090916).

详细信息

作者简介:
宋焱勋,工程地质专业.Email:songyx@chd.edu.cn

中图分类号: TU441
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- 被引次数: 0
出版历程
- 收稿日期: 2009-12-14
- 修回日期: 2010-01-22
- 刊出日期: 2010-12-25

TEST STUDY ON MECHANICAL CHARACTERISTICS OF AEOLIAN SAND IN MU US DESERT

1.
College of Geology Engineering and Geomatics,Chang'an University,Xi'an 71005;
2.
Open Research Laboratory of Geotechnical Engineering,The Ministry of Land Resources,Xi'an 710054;
3.
Company Limited of Chang-qing Science and Technology,Xi'an 710021;
4.
No.1 Geology Team of Exploration Bureau of Hebei Province,Handan 056001

摘要

摘要: 在对毛乌素沙漠风积砂物理特性进行试验研究的基础上,通过室内击试验、压缩试验及三轴剪切试验,对毛乌素沙漠风积砂的力学特性进行了初步研究。结果表明:毛乌素沙漠风积砂击实特性与粉、黏性土有较大的差异,在干燥和最佳含水率状态下易于击实,击实曲线呈双峰形态; 压缩试验表明毛乌素沙漠风积砂一般属于低压缩性土,其压缩特性与试样初始密度、含水率、荷载级别及加载条件有关; 三轴剪切试验表明毛乌素沙漠风积砂抗剪强度指标受试样密度的影响较大,虽然含水率对抗剪强度指标有一定影响且具有一定规律性,但影响程度并不明显。本文相关成果为解决该区风积砂相关岩土工程问题和工程地质问题提供了可靠的试验依据。
- 毛乌素沙漠 /
- 风积砂 /
- 力学特性 /
- 室内试验
Abstract: The physicochemical characteristics as well as the mechanical characteristics of aeolian sand are studied through tests in this paper. The result shows that the standard compaction curve of aeolian sand in the Mu Us desert different from that of silt and mud soil. The split-blip character of the standard compaction curve suggests that the higher dry density of aeolian sand can be obtained when the sand is dry or with the optimum moisture content. The aeolian sand has a low-compression ability and the compressibility is related with the initial dry density,water content and the load. The triaxial shear test shows that both of the density and the water content contribute to the shearing stregnth of the sand,between which the density contributes more and the water content only contributes a little. The work in this paper can offer some basic data for the resolution of the engineering geological problems in the Mu Us desert.
- Mu Us desert /
- Aeolian sand /
- Mechanical characteristics /
- Soil laboratory test

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参考文献(1)

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