孔隙水压力传感器的改装设计  

The Conversion Design of the Pore Pressure Sensor

作　　者：钟佳玉[1] 郑永来[1] 

机构地区：[1]同济大学土木工程学院水利系

出　　处：《实验室研究与探索》2010年第10期45-48,共4页Research and Exploration In Laboratory

摘　　要：以模型实验的方法,根据孔隙水压力计的工作原理,将微型土压力传感器改装成孔隙水压力传感器,用于模型实验中的实际监测,以验证改装后的孔压计的有效性,为实验提供可靠数据。将土压力传感器和由其改装的孔压计埋置于同一深度的砂土中,测得的土压力值略高于孔隙水压力值,这完全符合有效应力原理,定性地说明了改装后的孔压计有一定的工作效果;实验测得的孔压值与由Putnam得出的理论值基本吻合,其平均误差约为5%,最大误差不超过10%。由此定量地表明,改装后的孔隙水压力传感器是有效的,可以用于实际监测。Based on the working principle of the pore pressure sensors,the micro soil-pressure sensor is refitted into the pore pressure sensor so that it can be used as a practical monitor for the model experiment.The effectiveness of the refitted pore pressure sensor can be verified,thus providing reliable data for the experiment.As it can be seen from the experiment,the soil pressure sensor which is buried at the same depth as the refitted pore pressure sensor gets a higher measared value than that of the pore pressure sensor.This conforms exactly to the effective stress principle,which qualitatively proves the effectiveness of the refitted pore pressure sensor;the pore pressure value obtained from the experiment coincides well with the Putnam＇s theoretical value.The average error is approximately 5% and the maximum error is less than 10%,which quantitatively proves the effectiveness of the refitted pore pressure sensor,so that the pore pressure sensor is used in later experimental research.

关 键 词：模型试验 孔隙水压力 土压力 

分 类 号：TU411.4[建筑科学—岩土工程]