土工基础

›› 2015, Vol. 29 ›› Issue (6): 39-43.

• 工程实录 • 上一篇    下一篇

孔压静力触探在琼州海峡某海底线路工程中的应用实例

赵庆龙1,董治军1,沈建华2   

  1. （1.中国电力工程顾问集团中南电力设计院有限公司，武汉 430071； 2.中国科学院武汉岩土力学研究所，武汉 430071）
  • 收稿日期:2015-11-19 出版日期:2015-12-22 发布日期:2015-12-30
  • 作者简介:赵庆龙（1981-），男，高级工程师，研究方向为岩土工程及水文地质。
  • 基金资助:

    基金项目:国家自然科学基金青年基金(41302238)

Application of CPTU in the Marine Geotechnical Investigation in Qiongzhou Strait

ZHAO Qinglong1, DONG Zhijun1, SHEN Jianhua2   

  1. (1. Central Southern China Electric Project Power Design Institute, China Power Engineering Consulting Group, Wuhan 430071;
    2. Wuhan Institute of Rock and Soil Mechanics, Chinese Academy of Sciences, Wuhan 430071)
  • Received:2015-11-19 Online:2015-12-22 Published:2015-12-30

摘要： 静力触探试验（CPT）以其速度快、数据连续、再现性好、操作省力等优点被广泛应用于各类工程的岩土体勘察中。随着海洋资源的不断开发利用，CPT技术更因其独特的优越性得到更多的应用。以琼州海峡某海底线路工程为依托，全面介绍了孔压CPT在海底土层划分、粘性土抗剪强度估算、砂土状态及场地液化趋势判定中的应用，比对了测试分析结果与常规勘察方法计算结果，表明CPT测试技术在我国海域勘察中具有较高的可信度，其估算方法及经验公式在选择适合的参数后同样适合我国海域土体，为全面研究CPT在我国海域应用提供了实例参考。

关键词: 琼州海峡, 海底线路, 孔压CPT, 经验公式

Abstract: The cone penetration test with pore pressure measurement (CPTU) has been widely used in geotechnical investigation under various conditions due to its advantages of simple and fast operation, providing continuous and repetitive data. With the increasing demand of marine resource utilization, the CPTU receives wider applications in the marine geotechnical investigation. This paper presents a case history of geotechnical investigation for an undersea tunnel alignment project across the Qiongzhou Strait. The evaluation methods of marine soil stratigraphy, shear strength of cohesive and the liquefaction of loose sand are presented and compared with other conventional field and laboratory test results. The results indicate that the application of CPTU in the marine geotechnical investigation has the characteristics of better reliability. Evaluation methods and the empirical relationships used in the case history can also be used in similar marine environment.

Key words: Qiongzhou Strait, Undersea Tunnel, Cone Penetration Test with Pore Pressure Measurement (CPTU), Empirical Relationships