涉水区软土地基大变形沉降观测装置试验研究

Experimental Study on Large Deformation Settlement Observation Instrument Used for Soft Soil Foundation in Wading Areas

现阶段完全适用于超软土的大量程沉降监测仪器较少,通过大量沉降监测仪器和传感器选型,首次提出涉水区大量程沉降装置。通过室内试验论证该传感器精度和稳定性问题,并采用了大气校正探头、水位矫正探头优化该沉降装置。经工程应用对比分析,得出沉降观测仪的沉降量曲线和人工水准仪观测的沉降过程曲线基本吻合,且该装置不受施工作业和潮汐限制,安全可靠,可结合自动化采集技术,实现沉降监测的自动化,具有更广泛的应用空间。

At present ,the wide-range settlement monitoring instruments which are completely suitable for ultra soft soil are quite rare .So through the model selection by a large amount of settlement instruments and transformers ,the idea of wide-range settlement instrument in wading area was put forward for the first time .The transducer’s accuracy and stabili-ty were demonstrated through indoor tests;meanwhile the atmospheric correction probe and water level correction probe were adopted to optimize this settlement device .By means of the comparative analysis of engineering application ,the re-sults indicate that the settlement process curve obtained from the viewer is in agreement with that of the observed results of the leveling instrument .This instrument is safe and reliable ,and is not affected by construction work or tiding .By combining automatic acquisition technology ,the automatization of settlement monitoring can be achieved ,which will pro-vide this instrument broader application prospect .