摘要
本文针对大体积储罐注水加载过程中地基沉降监测需求,开展人工观测与静力水准仪自动化监测的对比试验研究。在连续12 d的注水加载过程中(分五个阶段),同步获取两种监测方法的沉降数据。研究结果表明:注水过程中,地基沉降呈现三阶段响应特点,初始阶段(注水量0.1H~0.5H):孔隙水压力消散导致全域沉降,降幅约-1 mm~-7 mm,体现了地基土体的快速固结变形;中期阶段(注水量0.5H~0.75H):沉降趋于稳定(<1 mm/d),但局部异常点(JC3和JC5)持续沉降,说明桩基础承载力分布不均;终期阶段(注水量达H上限):二次整体沉降发生,累计沉降量为-5 mm~-14 mm,不同测点间最大沉降差异为9 mm,说明荷载增加引发地基深层固结。在JC5~JC8测点,静力水准仪监测数据与人工观测值的平均偏差为±2 mm,具有良好的一致性,表明自动化系统可替代传统人工方法,提升监测效率和精度;JC1~JC4的人工监测和自动化监测差异扩大现象揭示了环境温度对静力水准仪测量存在显著干扰,需要开发温度补偿模型,以提升静力水准仪全天候自动化监测精度。研究成果为储罐工程安全监测体系优化和全生命周期安全管理提供了理论依据和技术支撑。
This article focuses on the monitoring requirements for foundation settlement during the water injection loading process of large-volume storage tanks,conducting a comparative experimental study between manual observation and automated monitoring using static level gauges.During the continuous 12-day water injection loading process(divided into five stages),settlement data were synchronously obtained using both monitoring methods.The research results indicate that during the water injection process,foundation settlement exhibits a three-stage response characteristic.In the initial stage(water injection volume of 0.1H~0.5H),pore water pressure dissipation leads to global settlement,with a decrease of approximately-1 mm~-7 mm,reflecting rapid consolidation deformation of the foundation soil.In the intermediate stage(water injection volume of 0.5H~0.75H),settlement tends to stabilize(<1 mm/d),but local abnormal points(JC3 and JC5)continue to settle,indicating uneven distribution of pile foundation bearing capacity.In the final stage(water injection volume reaches the upper limit of H),secondary overall settlement occurs,with a cumulative settlement of-5 mm~-14 mm,indicating that the increase in load triggers deep consolidation of the foundation.The maximum settlement difference between different measuring points is 9mm.At measuring points JC5~JC8,the average deviation between static level gauge monitoring data and manual observation values is±2mm,showing good consistency.This indicates that the automated system can replace traditional manual methods,enhancing monitoring efficiency and accuracy.The expanded differences between manual and automated monitoring at JC1~JC4 reveal significant interference from ambient temperature on static level gauge measurements,necessitating the development of a temperature compensation model to improve the accuracy of allweather automated monitoring using static level gauges.The research findings provide theoretical basis and technical support for optimizing the safety monitoring system of storage tank engineering.
作者
刘远安
金炼
卞德存
林佳
成晓
李柯柯
LIU Yuan-an;JIN Lian;BIAN De-cun;LIN Jia;CHENG Xiao;LI Ke-ke(South China Lantian Aviation Fuel Co.,Ltd.,Guangzhou 510420;Guangzhou Municipal Engineering Testing and Inspection Co.,Ltd.,Guangzhou 510520)
出处
《广州建筑》
2025年第12期71-75,共5页
Guangzhou Architecture
关键词
储罐
地基沉降
监测
静力水准仪
tank
foundation settlement
monitoring
static level
