静力水准在某基坑沉降监测中的应用及误差分析

摘要

静力水准自动化监测系统是一种高精密液位量测系统,用于测量基础和建筑物各个测点的相对沉降.通过静力水准在某深基坑工程变形监测中的应用实例,充分体现静力水准监测系统的实用性和优越性;但是在实际测量中,由于受气压、温度、施工振动等因素的影响,静力水准系统不同连通器液体密度会发生变化进而导致系统精度大大降低.分析压力、温度、振动等因素对监测结果的影响,总结静力水准系统的应用经验,提出不同影响因素的误差修正方法.静力水准具有自动化性能好、精度高、数据量丰富等优点,在工程监测中将发挥重大作用.%Hydrostatic leveling technology is a highly accurate liquid level measurement system,w hich can be used to measure relative settlement of multiple spot of base and building.The paper introduces the principle of this technology,for which the successful application of Hydrostatic Leveling Technology in deformation monitoring of a deep foundation pit project reflects great applicability and superiority. However,during the practical measurement,because of pressure,temperature and vibration,the liquid density of different communicating vessels maybe changes,w hich can make the system precision reduce greatly.At last,the paper analyzes the influence of pressure,temperature and vibration to the monitoring, and summarizes the application experience.The error correction methods of different influential factors are suggested.Hydrostatic leveling technology has some characteristics such as high degree of automation and accuracy,abundant data,w hich can play great role in engineering monitoring.