覆盖层沉降变形监测方法概述  

Overview of monitoring methods for the settlement deformation of alluvium deposit

作　　者：丁玉堂 陆阳洋 DING Yu-tang;LU Yangyang(Nanjing Hydraulic Research Institute)

机构地区：[1]南京水利科学研究院,江苏南京210024

出　　处：《大坝与安全》2024年第3期29-34,共6页Dam & Safety

基　　金：国家自然科学基金项目(U22A20602)。

摘　　要：坝基覆盖层沉降变形可对坝体结构运行性态产生直接影响,是水利工程中极为重要的监测项目。由于覆盖层深埋于坝体以下,在施工期与运行期开展沉降变形监测均存在较大难度。对此,本研究系统总结了现有各类监测方法,从仪器的工作原理、安装方法等方面进行了综合比较,并结合典型工程案例探讨了各类方法的优缺点及适用性。同时,利用现有的监测成果,总结了坝基覆盖层沉降变形的一般规律。本研究可为相关工程监测设计及覆盖层力学特性研究提供参考。The settlement deformation of alluvium deposit can directly influence the operation of dam structures,making it an extremely important monitoring item in hydraulic engineering.The alluvium de⁃posit is buried under dam body,thus its settlement deformation is difficult to be measured during con⁃struction and operation periods.In this study,several existing monitoring methods are systematically summarized.The working principle and installation method of instrument are compared.And some engi⁃neering examples are employed to explore the merits,defects and applicability of each monitoring meth⁃od.Meanwhile,based on existing monitoring results,the settlement deformation laws of alluvium deposit of dam foundation are concluded.This study can provide reference for monitoring design and research on mechanical properties of alluvium deposit in similar projects.

关 键 词：覆盖层 沉降变形 监测方法 变形规律 

分 类 号：TV698.1[水利工程—水利水电工程]