蒙脱石含量和土体状态对膨胀土收缩特性的影响

吴珺华; 匡唐亮; 叶云雪; 赵贵涛

doi:10.13204/j.gyjzG22011702

蒙脱石含量和土体状态对膨胀土收缩特性的影响

doi: 10.13204/j.gyjzG22011702

吴珺华^1,2,3,
匡唐亮¹,
叶云雪^1,2,3, ,,
赵贵涛⁴

1. 南昌航空大学土木建筑学院, 南昌 330063;
2. 水利部土石坝破坏机理与防控技术重点实验室, 南京 210024;
3. 江西省智慧建筑工程研究中心, 南昌 330063;
4. 武汉大学土木建筑工程学院, 武汉 430072

基金项目:

水利部土石坝破坏机理与防控技术重点实验室开放研究基金(YK321013)

国家自然科学基金项目(51869013)

南昌航空大学博士启动基金项目(EA201911396)。

详细信息

作者简介:
吴珺华,男,1985年出生,博士,教授。

通讯作者:
叶云雪,男,1988年出生,博士,讲师,yeyunxue@163.com。

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- 被引次数: 0
出版历程
- 收稿日期: 2022-01-17

Influence of the Montmorillonite Content and Soil State on Shrinkage Characteristics of Expansive Soil

WU Junhua^1,2,3,
KUANG Tangliang¹,
YE Yunxue^{1,2,3
, ,},
ZHAO Guitao⁴

1. School of Civil Engineering and Architecture, Nanchang Hangkong University, Nanchang 330063, China;
2. Key Laboratory of Failure Mechanism and Safety Control Techniques of Earth-Rock Dam, Ministry of Water Resources, Nanjing 210024, China;
3. Jiangxi Smart Building Engineering Research Center, Nanchang 330063, China;
4. School of Civil Engineering, Wuhan University, Wuhan 430072, China

摘要

摘要: 为研究不同含量蒙脱石和土体状态对膨胀土收缩特性的影响,采用能够反映土体状态的试样(泥浆样、预固结样和压实样)进行收缩特性试验。试验结果表明:随着蒙脱石含量的增大,泥浆样的收缩变形逐渐增大;预固结样在蒙脱石含量在某一范围时,收缩变形相差不大,随着蒙脱石含量的增大,预固结样会产生明显的收缩变形;对于泥浆样和预固结样,当蒙脱石含量超过一定值时,土体收缩特性曲线(SSCC)残余收缩段的曲率会不断减小;对比图解缩限,计算缩限更接近真实缩限,当SSCC为一条折线时,计算缩限与图解缩限相等;蒙脱石含量对膨胀土收缩特性的影响要大于土体状态。
- 膨胀土 /
- 蒙脱石含量 /
- 土体状态 /
- 收缩特性 /
- 缩限
Abstract: To study the influence of the montmorillonite content and soil state on the shrinkage characteristics of expansive soil, shrinkage characteristic tests were conducted on specimens which reflected soil state (in the slurry state, after consolidation, and in compaction state). The test results indicated as the montmorillonite content increased, the shrinkage deformation of the slurry specimens gradually increased, and as the montmorillonite content in pre-consolidated specimens was in a certain range, the differences of shrinkage deformation between specimens were not much, as the montmorillonite content increased to a certain amount, the pre-consolidated specimens would produce obvious shrinkage deformation. For slurry specimens and pre-consolidated specimens, when the montmorillonite content exceeded a specific value, the curvature in the residual shrinkage stage of soil shrinkage characteristic curves (SSCC) would constantly decrease. Comparing with the shrinkage limit obtained from the graphic method, the calculated values was closer to the actual value. When the SSCC was a broken line, the calculated shrinkage limit equaled to the value by the graphic method. The influence of the montmorillonite content on the shrinkage characteristics of expansive soil was greater than that of the soil state.
- expansive soil /
- montmorillonite content /
- soil state /
- shrinkage characteristics /
- shrinkage limit

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