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在深基坑开挖过程中,支护挡墙的弯矩一般通过测斜数据估算曲率后计算得到,基本思想是利用曲线拟合测斜数据,再对拟合曲线进行二次求导得到曲率。虽然有许多方法可以拟合测斜曲线估算曲率,但缺乏一致标准。主要结合武汉阅马场交通综合整治工程,采用分段三次曲线拟合五点的方法对实际工程中测得的较典型的位移曲线进行拟合并估算曲率,对支护桩曲率和弯矩进行计算分析。
In the process of excavation of deep foundation pit, the bending moment of retaining retaining wall is generally calculated by using the measured data of the inclinometer data. The basic idea is to use the curve to fit the measured inclinometer data and then to obtain the curvature through the quadratic derivation of the fitted curve . Although there are many ways to fit curvilinear estimates of curvatures, there is a lack of consistent standards. Mainly combined with the project of comprehensive improvement of traffic in Yuemachang of Wuhan, the typical displacement curves measured in the actual project are fitted and the curvature is calculated by the method of fitting cubic points of five steps, and the curvature and moment of the supporting pile are calculated analysis.