深层水平位移测量数值模拟研究

Research on Numerical Simulation of Deep Horizontal Displacement Measurement

岩土工程施工技术的发展使得以往建设难度较大的不良地质地区逐渐开始兴建各类土木工程项目,为保障工程项目安全施工,国内外提出了动态化监测的施工方法。深层水平位移测量是深基坑动态化监测中的重要环节,也是深基坑监测方法中最为有效的监测手段之一。本文对深层水平位移测量原理进行了研究,利用常微分方程数值解中的Euler法对深层水平位移测量过程进行了数值模拟分析研究;利用泰勒级数(Taylor)展开式对深层水平位移测量误差进行了分析,研究了测量初值误差、土体实际变形曲线形态、监测次数等对深层水平位移孔口误差值的影响;指出现有监测方法获得的工程实测深层水平位移曲线具有一定的合理性。

With the development of geotechnical engineering construction technology,various civil engineering projects have gradually begun to be constructed in areas with poor geological conditions that were difficult to construct in the past.In order to ensure the safe construction of engineering projects,dynamic monitoring construction methods have been proposed at home and abroad.Deep horizontal displacement measurement is an important link in the dynamic monitoring of deep foundation pits,and it is also one of the most effective monitoring methods in deep foundation pit monitoring methods.In this paper,the principle of deep horizontal displacement measurement is studied.This paper uses the Euler method in the numerical solution of ordinary differential equations to carry out numerical simulation analysis of the deep horizontal displacement measurement process.This paper analyzes the measurement error of deep horizontal displacement by using Taylor series expansion.This paper studies the influence of the initial measurement error,the actual deformation curve shape of the soil body,and the monitoring times on the error value of the deep horizontal displacement orifice.The article points out that the measured deep horizontal displacement curve obtained by the existing monitoring method has certain rationality.