基于逆有限元的基坑围护桩等效水平位移监测方法

doi:10.11947/j.AGCS.2024.20220686

测绘学报 ›› 2024, Vol. 53 ›› Issue (1): 126-136.doi: 10.11947/j.AGCS.2024.20220686

基于逆有限元的基坑围护桩等效水平位移监测方法

张宇轩¹, 龙四春¹, 赖咸根², 邝利军³, 苏瑞鹏¹, 卢世德², 张立亚¹, 周健³, 罗栋³, 廖孟光¹

1. 湖南科技大学地球科学与空间信息工程学院, 湖南湘潭 411201;
2. 中建五局土木工程有限公司, 湖南长沙 410011;
3. 中国建筑第五工程局有限公司, 广东深圳 518108

收稿日期:2022-12-03 修回日期:2023-06-15 发布日期:2024-02-06
通讯作者: 龙四春 E-mail:sclong@hnust.edu.cn
作者简介:张宇轩(1998-),男,硕士,研究方向为工程测量,自动化变形监测。E-mail:yxzhang@mail.hnust.edu.cn
基金资助:
国家自然基金(42377453;41877283);湖南省科技创新计划(2021RC4037;2023JJ30235);湖南省自然资源厅科研项目(2021-18)

Monitoring method of equivalent horizontal displacement of foundation pit surrounding pile based on inverse finite element

ZHANG Yuxuan¹, LONG Sichun¹, LAI Xiangen², KUANG Lijun³, SU Ruipeng¹, LU Shide², ZHANG Liya¹, ZHOU Jian³, LUO Dong³, LIAO Mengguang¹

1. College of Earth Science and Space Information Engineering, Hunan University of Science and Technology, Xiangtan 411201, China;
2. China Construction Fifth Engineering Bureau Civil Engineering Co., Ltd., Changsha 410011, China;
3. China Construction Fifth Engineering Co., Ltd., Shenzhen 518108, China

Received:2022-12-03 Revised:2023-06-15 Published:2024-02-06
Supported by:
The National Natural Science Foundation of China (Nos. 42377453;41877283); The Science and Technology Innovation Program of Hunan Province (Nos. 2021RC4037; 2023JJ30235); Scientific Research Project of Hunan Provincial Department of Natural Resources (No. 2021-18)

摘要/Abstract

摘要： 针对传统工程测量方法在深基坑围护桩形变监测中存在的局限性,提出了一种基于逆有限元的应力等效几何形变监测方法。该方法通过获取围护桩钢筋笼的轴向应力,采用逆有限元算法建立相关关系模型,等效求解围护桩在受土体等压力下产生的几何形变,并且通过模拟和实例对模型进行验证。试验结果表明,在不同的工况下,逆有限元关系模型均能实现桩体位移量的等效转换,且具有很好的精确度和稳健性。本文方法弥补了传统监测方法在结构内部监测中的不足,为深基坑围护桩等地下空间变形监测提供了一种思路,对监测工作自动化与科学预测形变有积极的推动作用。

关键词: 深基坑围护桩, 逆有限元, 等效形变, 精度分析, 稳健性

Abstract: Aiming at the limitations of the traditional geodetic method in monitoring the deformation of the retaining piles in deep foundation pits, a stress-equivalent geometric deformation monitoring method based on inverse finite elements is proposed. The inverse finite element algorithm is used to establish the correlation model, and the geometric deformation of the retaining piles under the pressure of the soil is equivalently solved, and the model is verified by simulation and examples. The experimental results show that under different working conditions, the inverse finite element relationship model can realize the equivalent conversion of pile displacement, and has good accuracy and robustness. This method makes up for the deficiencies of traditional monitoring methods in internal monitoring of structures, provides a new idea for deformation monitoring of underground spaces such as retaining piles around deep foundation pits, and plays a positive role in promoting the automation of monitoring work and scientifically predicting deformation.

Key words: deep foundation pit retaining pile, inverse finite element, equivalent deformation, precision analysis, robustness

中图分类号:

P258

张宇轩, 龙四春, 赖咸根, 邝利军, 苏瑞鹏, 卢世德, 张立亚, 周健, 罗栋, 廖孟光. 基于逆有限元的基坑围护桩等效水平位移监测方法[J]. 测绘学报, 2024, 53(1): 126-136.

ZHANG Yuxuan, LONG Sichun, LAI Xiangen, KUANG Lijun, SU Ruipeng, LU Shide, ZHANG Liya, ZHOU Jian, LUO Dong, LIAO Mengguang. Monitoring method of equivalent horizontal displacement of foundation pit surrounding pile based on inverse finite element[J]. Acta Geodaetica et Cartographica Sinica, 2024, 53(1): 126-136.

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基于逆有限元的基坑围护桩等效水平位移监测方法

Monitoring method of equivalent horizontal displacement of foundation pit surrounding pile based on inverse finite element

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