# [1]施洲,纪锋,余万庆,等.基于集对分析理论的大型沉井基础施工动态风险评估[J].东南大学学报(自然科学版),2021,51(3):419-425.[doi:10.3969/j.issn.1001-0505.2021.03.009] 　Shi Zhou,Ji Feng,Yu Wanqing,et al.Dynamic risk assessment of huge caisson foundation construction based on set pair analysis theory[J].Journal of Southeast University (Natural Science Edition),2021,51(3):419-425.[doi:10.3969/j.issn.1001-0505.2021.03.009] 点击复制 基于集对分析理论的大型沉井基础施工动态风险评估() 分享到： var jiathis_config = { data_track_clickback: true };

51

2021年第3期

419-425

2021-05-20

## 文章信息/Info

Title:
Dynamic risk assessment of huge caisson foundation construction based on set pair analysis theory

1西南交通大学土木工程学院, 成都 610031; 2中国铁路上海局集团有限公司南京铁路枢纽工程建设指部, 南京 200142
Author(s):
1School of Civil Engineering, Southwest Jiaotong University, Chengdu 610031, China
2Construction Headquarters of Nanjing Railway Terminal Project, China Railway Shanghai Bureau Group Co., Ltd., Nanjing 200142, China

Keywords:

U447
DOI:
10.3969/j.issn.1001-0505.2021.03.009

Abstract:
To study the dynamic risk assessment of large caisson foundation in large bridges during construction, a risk assessment index system was proposed by combining risk assessment with construction monitoring. A dynamic risk assessment model was established with the five-element connection main number based on the theory of set pair analysis and the index weight determined by the analytic hierarchy process method. Taking the caisson foundation of the Wufengshan Yangtze River Bridge as an example, a dynamic risk assessment was carried out. The results show that, for the secondary dynamic risk indexes, the concrete stress index decreases to -0.47 at the 102nd working day, reflecting that the stress of the caisson concrete is complex and the risk of cracking is high. The settlement coefficient index and the height difference of four-corner index after 102 d are low, exhibiting the risk of small-scale stagnant sinking and sudden sinking. For the first-level indexes, low values of the structural stress index and the control parameter index reflect the fact of the complex stress of concrete and the extra-high risk level. The overall index fluctuates significantly after 90 working days with the lowest value of -0.09, showing the middle risk status of the caisson during sinking.

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