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一套在室内岩石力学实验中建立的多点、宽频带、数字化应变观测系统经过改造，被应用于大型工程的现场观测。该系统频带宽度为０～１００Ｈｚ，动态范围８０ｄｂ，可以同时记录上百点的载荷或变形的动态过程，自动建立观测数据库，并且提供动态回放分析功能及标准数据交换接口。在高层建筑深基坑支护体系的载荷监测中，应用该系统取得了一批数据，它们记录了土压力与支护系统之间相互作用的动态过程。观测结果表明，在深基坑周围的土压力分布很不均匀。在开挖过程中，支护体系的受力状态既存在与开挖深度相关的趋势性变化，也存在受温度影响的周期性日变，还有在特殊因素触发下产生的突变。应用表明，这一系统为施工的安全监测提供了新手段。
A set of multi-point, wide-band, digital strain observing systems established in indoor rock mechanics experiments have been transformed and applied to on-site observation of large-scale projects. The system has a frequency bandwidth of 0 to 100 Hz and a dynamic range of 80 db. It can simultaneously record hundreds of points of load or deformation dynamics, automatically create an observation database, and provide dynamic playback analysis functions and standard data exchange interfaces. In the load monitoring of the deep foundation pit support system of high-rise buildings, a series of data were obtained using this system. They recorded the dynamic process of the interaction between earth pressure and support system. The observation shows that the distribution of earth pressure around the deep foundation pit is very uneven. During the excavation process, the stress state of the support system exists both with the trend changes related to the excavation depth, as well as with the cyclical diurnal changes that are affected by the temperature, as well as the mutations that are triggered by special factors. The application shows that this system provides new means for construction safety monitoring.