多功能孔压静力触探(CPTU)试验研究

孔压静力触探(CPTU)是20世纪80年代在国际上兴起的新型原位测试技术,因其诸多优点,特别适合于软土工程的勘察,目前在欧美诸国已得到广泛应用。本文首先对国内外静力触探(CPT)技术的发展作了简要的介绍,阐述了国外CPT的发展状况和我国CPT的现状。然后介绍了引进的美国多功能CPTU测试技术以及操作方法与技术要点,结合两个现场试验,对我国的原位测试技术与引进的多功能CPTU作了对比分析,最后得出了一些结论和建议。

Research on the Versatile Piezocone Penetration Test(CPTU)

As a new kind of in-situ test technique originated in 1980s,the Piezocone Peneration Test(CPTU) is especially suitable for engineering investigation of soft clay and is commonly used in the western developed countries because of its advantages.This paper first briefly introduces the development of cone penetration and the status of CPT test in China and abroad.Then,the operation procedure and technique of the CPTU are discussed in detail.According to the in-situ tests at two sites,the results using the CPTU are presented and compared to our conventional in-situ techniques.Some conclusions and suggestions on the CPTU are finally obtained.