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[1]荆宏亮,李亮,李堂飞,等.考虑土体参数和锚杆承载力随机性的桩锚深基坑安全评价方法*[J].中国安全生产科学技术,2025,21(12):142-151.[doi:10.11731/j.issn.1673-193x.2025.12.018]
　JING Hongliang,LI Liang,LI Tangfei,et al.Safety evaluation method for pile-anchored deep foundation pit considering the randomness of soil parameters and anchor capacity[J].Journal of Safety Science and Technology,2025,21(12):142-151.[doi:10.11731/j.issn.1673-193x.2025.12.018]
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考虑土体参数和锚杆承载力随机性的桩锚深基坑安全评价方法*

《中国安全生产科学技术》[ISSN:1673-193X/CN:11-5335/TB]

卷:
21
期数:
2025年12期
页码:
142-151
栏目:
职业安全卫生管理与技术
出版日期:
2025-12-30

文章信息/Info

Title:
Safety evaluation method for pile-anchored deep foundation pit considering the randomness of soil parameters and anchor capacity
文章编号:
1673-193X(2025)-12-0142-10
作者:
荆宏亮; 李亮; 李堂飞; 胡俊
(1.青岛理工大学 土木工程学院，山东 青岛 266520；
2.青岛新华友建工集团股份有限公司，山东 青岛 266101；
3.海南大学 土木建筑工程学院，海南 海口 570228)
Author(s):
JING Hongliang;  LI Liang;  LI Tangfei;  HU Jun
(1.School of Civil Engineering，Qingdao University of Technology,Qingdao Shandong 266520,China;
2.Qingdao Xinhuayou Construction Engineering Group Co.,Ltd.,Qingdao Shandong 266101,China；
3.School of Civil and Architectural Engineering,Hainan University,Haikou Hainan 570228,China)
关键词:
桩锚深基坑; 安全评价; 随机性; 有限元; 熵值法; 可拓评价
Keywords:
pile-anchored deep excavation;  safety evaluation;  randomness;  finite element;  entropy method; extension evaluation
分类号:
X947
DOI:
10.11731/j.issn.1673-193x.2025.12.018
文献标志码:
A
摘要:
为更加合理地评价基坑安全性，将土体参数(土体刚度、黏聚力、内摩擦角)和锚杆轴向侧摩阻力视为服从对数正态分布的随机变量，基于Python语言编写程序调用PLAXIS 3D进行基坑开挖模拟，获取各施工步下基坑的安全评价指标值(地表沉降、坑底隆起、桩顶水平位移、桩顶沉降、桩(墙)体弯矩以及锚杆轴力)。利用熵值法确定各评价指标的权重，并基于可拓评价模型分析每组样本下基坑的安全等级。研究结果表明：传统评价方法仅能给出1个确定的安全等级，而本文方法在考虑土体及结构参数的随机性后，可结合不同安全等级的频次综合评价基坑的安全等级，并确定对基坑安全有显著影响的评价指标(地表沉降和桩顶水平位移)；与传统方法相比，本文方法能够更合理、全面地评价基坑安全等级。研究结果可为桩锚深基坑安全评价提供参考。
Abstract:
In order to more rationally evaluate the safety of deep foundation pits,soil parameters (soil stiffness,cohesion and internal friction angle) and the axial side friction resistance of anchors are treated as lognormal random variables,and a Python-based program is developed to invoke PLAXIS 3D for excavation simulation so as to obtain,at each construction stage,the values of safety evaluation indices for the foundation pit (including surface settlement,base heave,pile-head horizontal displacement,pile-head settlement,bending moment of the pile or wall,and anchor axial force).The entropy weight method is used to determine the weight of each evaluation index,and an extension evaluation model is then employed to analyze the safety grade of the foundation pit for each sample.The results show that traditional evaluation methods can only provide a single deterministic safety grade,whereas the proposed method,after accounting for the randomness of soil and structural parameters,can comprehensively evaluate the safety grade of the foundation pit by combining the frequencies of different safety grades and can identify the evaluation indices that have a significant influence on pit safety (surface settlement and pile-head horizontal displacement).Compared with traditional methods,the proposed approach can evaluate the safety grade of foundation pits in a more reasonable and comprehensive manner.The findings can provide a reference for safety evaluation of pile-anchor deep foundation pits.

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备注/Memo

备注/Memo:
收稿日期： 2025-06-29
* 基金项目： 国家自然科学基金项目(42467019)
作者简介： 荆宏亮，硕士研究生，主要研究方向为基坑施工安全。
通信作者： 李亮，博士，教授，主要研究方向为岩土工程防灾减灾。
更新日期/Last Update: 2026-01-05