土工基础

土工基础 ›› 2020, Vol. 34 ›› Issue (4): 552-556.

• 测试技术 • 上一篇    下一篇

金沙江寨子村昔格达组地层力学特性试验研究

但路昭1,2，王建洪1,2，唐红波1,2，陈 贺2,3，付晓东4   

  1. （1.云南大永高速公路有限公司，云南大理 671000；2.云南省交通投资建设集团有限公司，昆明 650200；3.陆地交通气象灾害防治技术国家工程实验室，昆明 650041；4.中国科学院武汉岩土力学研究所，武汉 430071）
  • 收稿日期:2019-09-02 修回日期:2020-04-26 出版日期:2020-08-20 发布日期:2020-08-16
  • 作者简介:但路昭（1977-），男，教授级高级工程师，研究方向为桥梁、隧道等工程项目的管理。
  • 基金资助:
    云南省交通运输厅科技创新及示范项目（编号：云交科教［2017］33)

Geotechnical Properties of Xigeda Formation in Zhaizi Village Near Jinsha River

DAN Luzhao1,2, WANG Jianhong1,2, TANG Hongbo1,2, CHEN He2,3, FU Xiaodong4   

  1. (1.Yunnan Dayong Highway Construction Co. Ltd., Dali 671000;
    2.Yunnan Communications Investment & Construction Group Co. Ltd., Kunming 650200;
    3.National Engineering Laboratory for Meteorological Hazards Prevention of Surface Transportation, Kunming, 650041;
    4.Institute of Rock and Soil Mechanics, Chinese Academy of Sciences, Wuhan 430071)
  • Received:2019-09-02 Revised:2020-04-26 Online:2020-08-20 Published:2020-08-16

摘要： 针对云南省寨子村堰塞湖沉积的昔格达组粉砂，开展了一系列室内力学试验和不同浸水条件下的平板载荷试验，并将试验结果与昔格达组地层广泛分布的攀枝花、西昌地区的研究结果进行了对比分析。研究结果表明：云南寨子村昔格达组地层主要由粉粒、砂粒组成，呈水平层理构造，平板载荷作用下沿水平层理滑移变形，主要以局部剪切破坏为主，是一种力学性质较差的半成岩；与西昌和攀枝花地区的昔格达组地层比较而言，寨子村昔格达组粉砂的强度指标、弹性模量和变形模量较大，但充分饱和后其强度迅速减小。

关键词: 岩土力学, 昔格达组地层, 平板载荷试验, 地基承载力

Abstract: A series of laboratory tests and plate load tests under different conditions of water immersion were conducted aim at solving a lack of researches on Xigeda formation siltcaused by lake deposit located in Zhaizi Village, Yunnan Province, China. The experimental data were then compared with the researches on widely distributed Xigeda strata situated at Panzhihua and Xichang regions. The results demonstrate that the Xigeda strata located in Zhaizi Village, Yunnan Province are mainly composed of silt granules and sand granules, and present horizontal bedding formation, which are semiforming rocks with poorer mechanical properties. Local shear failure plays a major role after plate loading for this kind of rocks. The strength indictors, elastic moduli and deformation moduliobtained from the tests on Xigeda formation silt are larger than those situated at Panzhihua and Xichang regions. The strength of these rocks decreases rapidly under the condition of fully immersion in water.


Key words: Geotechnical Engineering, Xigeda Formation, Plate Load Test, Bearing Capacity of Foundation Soils

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