基于分区回归模型确定建筑物倾斜状态
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摘要
针对高层建筑物外部结构复杂、仪器设站困难的问题,提出了分区回归模型,拟合基础沉降面,确定建筑物倾斜状态。在建筑物内部基础上均匀布设沉降监测点,测量出各周期累积沉降量,对基础沉降进行分块拟合,获得基础沉降的局部变形特征,以此进行区域划分,最后利用基础沉降面的法线向量确定建筑物倾斜度和倾斜方向。对比传统倾斜测量结果可以看出,利用分区回归模型能满足实际工程需求,比回归平面模型具有更高的精度和适用性。
According to the complicated structures of the city high-rise buildings and the difficulty of setting up instruments externally,this paper puts forward subregional regression model to determine building inclining state through fitting surface of foundation settlement. The monitoring points were equably distributed on the building foundation,whose settlement was measured periodically.Fitting each block of foundation settlement,the local deformation features were obtained. According to the features,the deformation regions were divided. Finally,the oblique angle and direction of buildings were calculated through the normal vector of fitting surface.Compared with traditional tilt observation methods,results show that subregional regression model can meet the actual engineering requirements and it has better precision and feasibility than regression plane model.
According to the complicated structures of the city high-rise buildings and the difficulty of setting up instruments externally,this paper puts forward subregional regression model to determine building inclining state through fitting surface of foundation settlement. The monitoring points were equably distributed on the building foundation,whose settlement was measured periodically.Fitting each block of foundation settlement,the local deformation features were obtained. According to the features,the deformation regions were divided. Finally,the oblique angle and direction of buildings were calculated through the normal vector of fitting surface.Compared with traditional tilt observation methods,results show that subregional regression model can meet the actual engineering requirements and it has better precision and feasibility than regression plane model.
引文
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[12]秋仁东,刘金砺,高文生,等.群桩基础沉降计算中的若干问题[J].岩土工程学报,2011(S2):15-23.
[13]祝辉.基础差异沉降对上部结构的影响[J].建筑结构,2016,46(S1):844-847.
[14]王佳丽,陈天伟,秦豪,等.GPS水准多项式曲面拟合的选取及应用[J].地理空间信息,2016,14(4):52-55.
[15]王昶,王旭.GPS高程拟合分区方法研究[J].大地测量与地球动力学,2016,36(1):26-29.
[2]王旭华,刘宇辰.基于平面拟合的高层建筑物倾斜观测新方法[J].测绘通报,2013(3):73-74.
[3]程强,何丽媛,李勇.利用电子全站仪测定圆柱倾斜度[J].淮海工学院学报(自然科学版),2011(S1):106-107.
[4]王健,孙文潇,梁周雁,等.三维激光扫描的龙柱倾斜观测方法[J].测绘科学,2017,42(9):116-120.
[5]TANG Y,WANG S.A new approach based on plane and circular fitting to survey the axial shape and assess the inclination of ancient Chinese pagodas[J].Ksce Journal of Civil Engineering,2016,20(5):2014-2021.
[6]KHOMYAKOV V A,SHOKBAROV Y M,BRYANTSEVA A.Experience in handling differential settlements of multi-storey buildings on soft soil[J].Soil Mechanics&Foundation Engineering,2017,54(5):330-335.
[7]李慧.某倾斜小高层沉降观测及纠偏处理的数值模拟[D].沈阳:沈阳建筑大学,2014.
[8]王楠,张郁.超高层建筑物的沉降观测方法[J].测绘地理信息,2017,42(3):110-112.
[9]中国有色金属工业协会.工程测量规范:GB 50026-2007[S].北京:中国建筑工业出版社,2007.
[10]马咏梅,刘竹.某酒店变形观测技术探讨[J].西南师范大学学报(自然科学版),2012,37(5):78-84.
[11]独知行,王同孝,靳奉祥.利用回归平面确定建筑物的倾斜变形状态[J].工程勘察,1998(1):67-69.
[12]秋仁东,刘金砺,高文生,等.群桩基础沉降计算中的若干问题[J].岩土工程学报,2011(S2):15-23.
[13]祝辉.基础差异沉降对上部结构的影响[J].建筑结构,2016,46(S1):844-847.
[14]王佳丽,陈天伟,秦豪,等.GPS水准多项式曲面拟合的选取及应用[J].地理空间信息,2016,14(4):52-55.
[15]王昶,王旭.GPS高程拟合分区方法研究[J].大地测量与地球动力学,2016,36(1):26-29.