苏通大桥岩土特性的扁铲侧胀试验研究

随着工程建设规模的不断扩大,岩土工程设计中对岩土参数的精度和可靠性要求越来越高。由于岩土性质对其所赋存环境的强烈依赖性,仅仅依靠室内测试方法已远远不能满足岩土工程设计的要求,因此岩土性质的现场原位测试技术和方法在岩土工程,特别是大型岩土工程的勘察和设计中具有越来越重要的地位和作用。本文结合苏州—南通(苏通)长江公路大桥建设的实际,运用扁铲侧胀仪(DMT),对桥梁地基的有关岩土参数进行了现场试验研究。通过与常规室内外试验结果的对比分析发现,这种试验不仅具有快速、简便、经济、重复性好的特点,而且其所提供的岩土信息丰富、结果可靠。

AN IN-SITU TEST STUDY OF SOIL PROPERTIES USING DMT FOR SUZHOU-NANTONG BRIDGE

The success construction of large-scale projects hing es greatly upon the accuracy and reliability of the soil parameters,due to the com plexity and diversity of soil formation processes and the fact that soil proper ties heavily rely on the environment in which t he soil exists.Hence in-situ testing techniques and methods have been taking an increasingly important part in geotechnical investigation and design,especially for large-scale projects such as bridges, tunnels etc. In this Paper, an in- situ instrument,the flat dilatometer ,is used in the geotechnical investigation to provide the necessary foundation design data for a bridge.It is found that th e DMT is not only a quick, simple, economical and highly reproducible in-situ t esting device, but also can give reliable soil parameters,comparing with the dat a obtained by ordinary laboratory tests and in-situ explorations.