缺级粗粒土管涌类型的判别方法

›› 2009, Vol. 30 ›› Issue (8): 2249-2253.

缺级粗粒土管涌类型的判别方法

陈群¹，刘黎²，何昌荣¹，朱分清³

1. 四川大学山区河流开发与保护国家重点实验室，2. 四川大学水利水电学院，成都 610065； 3. 中国科学院成都山地灾害与环境研究所，成都 610041；4. 中国中铁二院工程集团有限责任公司，成都 610031

收稿日期:2008-04-25 出版日期:2009-08-10 发布日期:2011-03-14
作者简介:陈群，女，1972年生，博士，副教授，主要从事土力学的教学和科研工作。
基金资助:
国家自然科学基金资助项目（No. 50709022）；2007年新世纪优秀人才支持计划（No. NCET-07-0569）。

Criterion of piping types for gap-graded coarse-grained soils

CHEN Qun¹，LIU Li²，HE Chang-rong¹，ZHU Fen-qing³

1. State Key Laboratory of Hydraulics and Mountain River Engineering, Sichuan University, Chengdu 610065, China; 2. College of Hydraulic and Hydroelectric Engineering, Sichuan University, Chengdu 610065, China; 3. Institute of Mountain Hazards and Environment, Chinese Academy of Sciences, Chengdu 410014, China; 4. China Railway Eryuan Engineering Group Co. Ltd., Chengdu 610031, China

Received:2008-04-25 Online:2009-08-10 Published:2011-03-14

摘要/Abstract

摘要：

利用大型渗透变形仪，对不同最大粒径和细粒含量的缺级粗粒土的渗透破坏特性进行了系统的试验研究。研究结果表明，缺级粗粒土在细料含量小于30 %的情况下都发生管涌型渗透破坏，基本符合前人提出的判别流土和管涌的准则。管涌破坏的类型可划分为发展性管涌和非发展性管涌两种，采用刘杰和康德拉且夫对发展性和非发展性管涌的判别方法都不能区分本次试验的管涌破坏类型。在康德拉且夫提出的判别粗粒土管涌类型的方法的基础上，考虑细料对粗料孔隙的填充程度及试样中缺级颗粒百分含量的影响，建立了缺级粗粒土管涌类型的判别式，为缺级粗粒土管涌类型的判别提供了新的思路和方法。

关键词: 粗粒土, 渗透变形试验, 渗透破坏, 管涌

Abstract:

Large filtration erosion tests of many soil samples are performed to study the filtration erosion property of the gap-graded coarse-grained soils. The test results illustrate that piping will occur for the gap-graded coarse-grained soils if the fine-grained component less than 30%. This result accords with the criteria of boiling and piping proposed by previous researchers. The piping type can be divided into continuous and discontinuous piping. The criteria of continuous and discontinuous piping proposed by Liu Jie and Кондратьев are used to distinguish the two types of piping, but the test results disagree with their criteria. Based on the criteria of continuous and discontinuous piping proposed by Кондратьев, the criteria of continuous and discontinuous piping are proposed considering the filling degree of fine particles to the void of coarse-grained components and the influence of percentage of gapped particles. This criterion provides new idea and method to distinguish the two types of piping for the gap-graded coarse-grained soils.

Key words: coarse-grained soil, seepage deformation test, seepage failure, piping

中图分类号:

TV 223.6

陈群，刘黎，何昌荣，朱分清. 缺级粗粒土管涌类型的判别方法[J]. , 2009, 30(8): 2249-2253.

CHEN Qun，LIU Li，HE Chang-rong，ZHU Fen-qing. Criterion of piping types for gap-graded coarse-grained soils[J]. , 2009, 30(8): 2249-2253.

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