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在目前城市深基坑水平位移监测作业面较小的情况下,视准线法是一种较有效的也是最常用的监测方法。本文首先结合具体测量数据,介绍视准线测量方法中的小角法与活动觇牌法的基本原理以及相关公式的推导,对数据结果进行了精度评定并分析影响其精度的主要因素。最后,结合测量数据处理的结果,分析在进行基坑工程水平位移监测时监测方案的选取,为今后基坑的监测提供参考。
In the current urban deep foundation pit horizontal displacement monitoring work surface is small, the line of sight method is a more effective and most commonly used monitoring methods. In this paper, the author first introduces the basic principle of small angle method and activity card method and the derivation of related formulas based on the specific measurement data, and evaluates the accuracy of the data and analyzes the main factors affecting the accuracy of the method. Finally, combined with the results of measurement data processing, the paper analyzes the selection of the monitoring scheme during the horizontal displacement monitoring of the foundation pit project, which provides reference for the future pit monitoring.