土工基础

土工基础 ›› 2022, Vol. 36 ›› Issue (3): 445-451.

• 测试技术 • 上一篇    下一篇

基于聚类分析的红黏土崩解试验研究

马江敏1,2，刘宝臣2,3，张炳晖2,3，熊俊豪4   

  1. （1.贺州学院建筑与电气工程学院，广西贺州 542899；2.广西建筑新能源与节能重点实验室，广西桂林 541004;
    3.桂林理工大学 土木与建筑工程学院，广西桂林 541004;4.珠海交通集团有限公司，广东珠海 519060)
  • 收稿日期:2021-01-12 修回日期:2021-02-23 出版日期:2022-06-30 发布日期:2022-06-26
  • 通讯作者: 张炳晖（1983-），男，硕士，副教授，研究方向为岩溶区环境岩土工程。
  • 作者简介:马江敏（1995-），女，硕士，研究方向为岩土工程。
  • 基金资助:
    国家自然科学基金 (11962004)，广西建筑新能源与节能重点实验室基金（桂科能16-J-21-6，桂科能19-J-21-22）

Experimental Study on Slaking of Red Clay by the Cluster Analysis

MA Jiangmin1,2, LIU Baochen2,3, ZHANG Binghui2,3, XIONG Junhao4   

  1. (1.School of Architecture and Electrical Engineering,Hezhou University,Hezhou  542899,China；
    2.GuangXi Key Laboratory of New Energy and Building Energy Saving, Guilin 541004, China；
    3.College of Civil Engineering and Architecture, Guilin University of Technology, Guilin 541004, China；
    4.Zhuhai Communication Group, Zhuhai 519060, China)
  • Received:2021-01-12 Revised:2021-02-23 Online:2022-06-30 Published:2022-06-26

摘要： 红黏土在桂林及周边地区分布广泛，受人类活动、地质构造与气候的影响，与红黏土崩解相关的地质灾害时有发生，使该区域人民的生命财产蒙受巨大损失，考虑红黏土在水的作用下会发生崩解这一性质，通过室内红黏土分别在pH=2、pH=7、pH=12试液中进行崩解的试验，结合聚类分析，将试样发生崩解的时间和残余体积率作为参考指标，在SPSS中进行系统聚类分析分别将在酸性、中性试液中进行崩解的试样分成了4类，在这两种环境中发生崩解往往伴随着气泡的逸出，崩解现象极其相似，其pH值几乎不变；将在碱性试液中进行崩解的试样分为了2类，试样发生完全崩解，其pH值有所下降。运用聚类分析结果结合试验观察现象及数据总结各类试样在不同环境下的崩解规律和特征，为实际工程中因红黏土崩解引发的地质灾害防治提供理论参考。


关键词: 红黏土, 崩解, 聚类分析

Abstract: The red clay is widely distributed in Guilin City and its adjacent areas. With the influence of human activities, geological structure and climate, geological hazards related to the red clay slaking occur from time to time. The geohazards might cause significant life and property loss in this area. Considering the slaking of the red clay under the action of water, the laboratory red clay slaking test in solutions with pH values of 2, 7, and 12, respectively, were performed. Combined with the cluster analysis, the test used the time of sample disintegration and the residual volume rate as reference indicators. The systematic cluster analysis in SPSS divided the samples that disintegrate in acidic and neutral solutions into four different categories. Under both acidic and neutral solutions, the disintegration occurred often accompanied by the escape of gas bubbles. Slaking phenomenon is very similar, and the pH value is almost unchanged; the samples that disintegrated in the alkaline solution were divided into two categories, and the sample is completely disintegrated, and its pH value decrease. Throughout the cluster analysis results combined with the experimental observations and the data to summarize the slaking characteristics of various samples under different environments and provided a theoretical basis for the prevention and the control of geological hazards caused by the red clay slaking in the engineering practice.

Key words: red clay, slake, cluster analysis

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