接触面滑坡滑带土吸力的滤纸法测试

谌文武; 刘鹏; 刘伟; 林高潮; 许贺

doi:10.11779/CJGE2018S1018

接触面滑坡滑带土吸力的滤纸法测试 English Version

谌文武^{1, 2},
刘鹏¹,
刘伟¹,
林高潮¹,
许贺¹

1. 兰州大学土木工程与力学学院,甘肃兰州 730000;
2. 兰州大学西部灾害与环境力学教育部重点实验室,甘肃兰州 730000

基金项目: 国家重点基础研究发展计划（“973”计划）项目（2014CB744701）

详细信息

作者简介:
谌文武(1966- ),男,河南信阳人,教授,博士生导师,主要从事地质灾害与文物保护方面工作。E-mail：sungp@lzu.edu.cn。

中图分类号: TU411
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出版历程
- 收稿日期: 2018-02-23
- 发布日期: 2018-08-24

Suction tests on sliding soil in interface landslide based on filter paper method

1. School of Civil Engineering and Mechanics, Lanzhou University, Lanzhou 730000, China;
2. Key Laboratory of Mechanics on Disaster and Environment in West China, Lanzhou University, Lanzhou 730000, China

摘要

摘要: 吸力是控制非饱和土状态的一个决定性因素,滤纸法就是一种间接测量吸力的方法,具有成本低、测量范围大、测量精度高等优点。滤纸法测试土样取自甘肃省天水市一黄土-泥岩接触面滑坡的滑带土,该土样的强度对含水率变化非常敏感,因此对该滑带土的非饱和特性的研究至关重要。试验中首先测定了该滤纸干湿两种状态下的平衡时间,然后对试样分别采用干湿两种状态下的双圈牌203和Whatman No.42型滤纸进行了对比试验,运用接触式和非接触式方法分别测定试样的基质吸力和全吸力。通过分析对比低吸力段滤纸含水率,确定了滤纸法测试该类土的下限吸力值。采用Oringin软件对试样全阶段基质吸力曲线拟合,确定了相应的拟合参数和合适的拟合方程。为进一步研究和治理该滑坡提供了参考价值。
- 黄土-泥岩滑坡 /
- 滑带土 /
- 吸力 /
- 土水特征曲线 /
- 滤纸法
Abstract: Suction is a decisive factor to control the state of unsaturated soils. The filter paper method is an indirect method for measuring suction, which has the advantages of low cost, large measuring range and high precision. The soil samples are collected from a loess-mudstone landslide in Tianshui, Gansu Province. The strength of soil samples is very sensitive to change of soil water content, so the study on the properties of unsaturated soils of the sliding soil is essential. The equilibrium time of the filter paper is measured under wet and dry conditions. Then, the samples are tested by double-circle 203 and Whatman No. 42 filter papers under dry and wet conditions. The contact and Non-contact methods are used to measure the matrix suction and total suction respectively. The lower suction value of this kind of soil is determined by analyzing and comparing the moisture content of filter papers in low suction section. The Oringin software is used to fit the matrix suction curve of the samples, and the corresponding fitting parameters and equation are determined so as to provide a reference for further study and treatment of the landslide.
- loess-mudstone landslide /
- sliding soil /
- suction /
- SWCC /
- filter paper method

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参考文献(18)

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