由于具有对土体扰动小、试验点连续、能较好地反映原位土的力学性质等优点,扁铲侧胀试验被越来越广泛应用于实际工程。但是,在扁铲侧胀试验测定过程中,加压速率等因素对试验结果有一定影响,这些因素对试验结果影响程度多大,测试结果误差如何衡量和修正却无从给出,而且扁铲侧胀试验不能直接测定孔隙水压力。为此,添加微型位移传感器和孔压传感器,对传统扁铲侧胀仪进行改进,成为孔压位移扁铲侧胀仪(pore pressure and displacement flat dilatometer)。使得扁铲试验具有自校准功能并兼备孔压测定功能。介绍了孔压位移扁铲侧胀试验的原理、过程和方法,并分析了孔压位移扁铲侧胀试验与传统扁铲侧胀试验的异同。通过与传统扁铲的对比试验得出,孔压位移扁铲侧胀试验测试结果更加稳定、准确,并首次在纬三路试验场地通过孔压位移扁铲侧胀试验确定了原位静止土压力,进行了成功应用。 Due to the advantages of small disturbance to soil mass, continuous test points and better reflection of the mechanical properties of in situ soil, the flat dilatometer test is more and more widely used in practical engineering. However, during the measurement of flat dandruff test, the factors such as the rate of pressurization and other factors have some influence on the test results. How much influence these factors have on the test results, how to measure and correct the test result errors are not given, The test can not directly determine pore water pressure. To this end, the addition of micro-displacement sensors and pore pressure sensors to improve the traditional flat dilatometer instrument to become pore pressure displacement dilatometer (pore pressure and displacement flat dilatometer). Making flat shovel test with self-calibration function and both pore pressure measurement. The principle, process and method of flat displacement of flat doffer were introduced. The similarities and differences between flat dilatometer test of flat doffer and flat dilatometer test were analyzed. Comparing with the traditional flat shovel, the test results of the hole pressure displacement flat shovel dilatancy test are more stable and accurate. For the first time, the in situ static earth pressure , Has been successfully applied.