宽级配砂土基料-滤层系统的室内模型试验研究
摘要:基料-滤层利用数码可视化跟踪技术、计算机信息实时处理技术和土体变形无标点量测技术,对宽级配基料-滤层系统进行了渗透室内模型试验。探讨了滤层准则的适用性,研究了不同滤层厚度和加压速率对管涌发生发展的影响。结果表明:传统太沙基滤层准则不适用于宽级配砂土,建议采用可移动颗粒中的d85s。进行滤层准则设计;增加滤层厚度可提高系统的抗渗透破坏能力,但提高滤层厚度对提高整个系统抵抗渗透能力作用不大;水力梯度增加较快不利于系统的稳定。
Abstract:By using visual tracing techniques, real-time digital process techniques and non-target measuring techniques,the lab model tests on base soil-filter of broadly graded sandy soil were carried out. The applicability of the filter-layer standard has been discussed; different filter layer thickness and compression rate on piping development influence has invested. The resuits proved that: the traditional Terzaghi filter guideline is improper for broadl graded sand, d85 of moving particles can be used in the design guideline; Increasing filter layer thickness could improve that the system of the seepage failure, but the system penetration ability only improved a little; hydraulic gradient increases faster is not conducive to the stability of the system.
中文标题:
宽级配砂土基料-滤层系统的室内模型试验研究
Lab Model Testing on Piping-filter Prevention in Broadly Graded Sandy Soil
作者:
白彦峰
Bai Yanfeng
作者简介:白彦峰,1983年生,男,河南商丘人,博士,工程师,主要从事特殊土地基处理、路基路面等设计科研工作。E-mail:b6y6f6@163.com
通讯地址:
上海市政工程设计研究总院(集团)有限公司, 上海 200092
ShanghaiMunicipalEngineeringDesignGeneralInstitute(Group)Co.Ltd,Shanghai200092,China
中图分类号:TV139.16;TV223.4
doi:10.3969/j.issn.1007-2993.2012.01.001
出版物:岩土工程技术
收稿日期:2011-10-12
网络出版日期:2021-07-06
关键词:管涌,宽级配砂土,基料一滤层,模型试验
Key words:piping,broadly graded sandy soil,base soil-filter,model testing
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基金项目:
基金项目: 国家自然科学基金资助项目(50379037)
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