基于测斜数据的桩身弯矩计算  

Calculation of Pile Bending Moment Based on Inclinometer Data

作　　者：胡国保 何祖钧 王伟亮 何钦 HU Guobao;HE Zujun;WANG Weiliang;HE Qin(Qingyuan Construction Engineering Quality Inspection Station Co.,Ltd.,Qingyuan 511500,China;Sanshui Construction Quality Test Center,Foshan 528100,China;Guangdong Construction Engineering Quality&Safety Testing Head Station Co.,Ltd.,Guangzhou 510500,China)

机构地区：[1]清远市建设工程质量检测站有限公司,广东清远511500 [2]佛山市三水区建筑工程质量检测站,广东佛山528100 [3]广东省建设工程质量安全检测总站有限公司,广州510500

出　　处：《广东土木与建筑》2023年第1期47-50,共4页Guangdong Architecture Civil Engineering

摘　　要：为使用测斜数据推断基坑支护桩弯矩,对某工程测斜数据采用三点圆求曲率法、多项式拟合法、样条拟合法对所选时间内的测斜数据进行计算分析,对比各种方法计算弯矩的适用性;并将钢筋计所测数据计算的桩身弯矩作为实测值与测斜计算结果进行对比。其结果表明:三点圆法与样条插值计算曲率求弯矩与实测值偏差较大,且数据波动变化大,在实际工程中不具有实用性;五次多项式拟合可以较好拟合测斜数据,计算弯矩与实际弯矩值吻合程度高。因此在工程中采用多项式拟合求桩身弯矩是较为实用的方法。In order to infer the bending moment of foundation pit supporting piles by using inclinometer data,three-point circle curvature method,polynomial fitting method and spline fitting method are used to calculate and analyze the inclinometer data in the selected time,compare the applicability of various methods to calculate the bending moment,and compare the bending moment of pile shaft measured by reinforcement meter as the measured value with the inclinometer calculation results.The results show that the bending moment calculated by the three-point circle method deviates greatly from the measured value,and the data fluctuates greatly,so it is not practical in practical engineering;Quintic polynomial fitting can better fit the inclinometer data,and the calculated bending moment is highly consistent with the actual bending moment.Therefore,it is a more practical method to use polynomial fitting to obtain the bending moment of pile body in engineering.

关 键 词：测斜 三点圆法 多项式拟合 样条拟合 桩弯矩 

分 类 号：TU198.2[建筑科学—建筑理论]