基于扁板侧胀试验的软土地基承载力研究

摘要

研究目的:扁板侧胀试验在岩土工程中的应用很多,而对于如何利用其计算软土地基承载力还有待于研究.本文利用现场原位测试试验数据对如何通过扁板侧胀试验获取软土地基承载力进行详细研究.研究结论:本文依托商合杭高速铁路的原位测试,进行对比试验研究,得出扁板侧胀试验所得侧胀模量ED与静力触探Ps、十字板剪切试验Su之间的关系,给出通过扁板侧胀试验获得软土地基承载力的公式:fak=0.019ED+15(ED≤5 000 kPa),并将计算结果与其他试验方法进行对比,能较好地反映现场软土的地基承载力.%Research purposes; Application of flat dilatometer test (DMT) in Geotechnical Engineering is quite a lot.However, how to use it to obtain soft soil foundation bearing capacity has to be studied. The paper studied on how toobtain soft soil foundation bearing capacity through DMT using in - situ tests data.Research conclusions: Relying on in - situ tests of Shangqiu - Hangzhou high - speed railway, the paper studied thecomparison and analyzed the correlation between dilatometer modulus ED and static cone penetration test Ps and vaneshear test Su, then obtained the calculation formula of soft soil foundation bearing capacity through DMT,fak =0.019ED +15(ED≤5 000 kPa). Calculated results were compared with other tests and DMT reflected soft soil foundation bearingcapacity better.