基坑工程中混凝土支撑轴力试验与分析

Test and Analysis of Concrete Supporting Axial Force in Foundation Pit Engineering

在基坑施工过程中,支撑结构轴力往往是基坑工程现场监测的主要内容之一,其作用在于避免支撑轴力超过设计强度导致支撑破坏引起整个支护体系失稳或破坏。但在实际工程中,由于基坑本身力学性质复杂,加之工程设计估算的简化和现场施工存在诸多偶然因素的不确定性,使基坑支护结构监测数据和设计提供数值存在一定的差异。本项研究通过理论结合试验分析,对目前混凝土支撑轴力监测进行探索和讨论,以期解决目前基坑支撑轴力监测出现的问题,提高监测数据的准确性。

During the construction of the foundation pit,the axial force is part of the on-site monitoring of the foundation pit,and its function is to avoid the instability or damage of the whole support system caused by the support force exceeding the design strength. However,in the actual engineering,due to the complexity of the mechanical properties of the foundation pit,combined with the simplifica- tion of the engineering design estimation and the existence of many uncertainties in the field construction,there are some differences in the monitoring data and the design value of the foundation pit suppor! structure. Through the theoretical analysis and the test,it is hoped to solve the problems existing in the monitoring of the axial support of the foundation pit,to improve the accuracy of the monitoring data.