Field Study on Deformation and Stress Characteristics of Large Open Caisson during Excavation in Deep Marine Soft Clay

Oujiang River North Estuary Bridge in Wenzhou is the world’s first double-deck suspension bridge under construction with three-tower and four-span. It is the first time to build large open caisson foundation in the deep marine soft clay in estuary with strong tide, extending the application scope of...

Descripción completa

Guardado en:

Detalles Bibliográficos
Autores principales:	Xin Yan, Wei Zhan, Zhi Hu, Danqiang Xiao, Yiqiang Yu, Jinchang Wang
Formato:	article
Lenguaje:	EN
Publicado:	Hindawi Limited 2021
Materias:	Engineering (General). Civil engineering (General) TA1-2040
Acceso en línea:	https://doaj.org/article/cd2850c8ce074378a7372bf7b892517f
Etiquetas:	Agregar Etiqueta Sin Etiquetas, Sea el primero en etiquetar este registro!

id	oai:doaj.org-article:cd2850c8ce074378a7372bf7b892517f
record_format	dspace
spelling	oai:doaj.org-article:cd2850c8ce074378a7372bf7b892517f2021-11-08T02:36:42ZField Study on Deformation and Stress Characteristics of Large Open Caisson during Excavation in Deep Marine Soft Clay1687-809410.1155/2021/7656068https://doaj.org/article/cd2850c8ce074378a7372bf7b892517f2021-01-01T00:00:00Zhttp://dx.doi.org/10.1155/2021/7656068https://doaj.org/toc/1687-8094Oujiang River North Estuary Bridge in Wenzhou is the world’s first double-deck suspension bridge under construction with three-tower and four-span. It is the first time to build large open caisson foundation in the deep marine soft clay in estuary with strong tide, extending the application scope of caisson. To study the deformation and stress characteristics of large open caisson during excavation and ensure the safety of anchorage excavation, a large number of sensors are arranged in the caisson. By analyzing the change of tip resistance, lateral soil pressure, and posture parameters during caisson excavation, the stress characteristics and deformation of caisson are described. The result shows the following. (1) Because of the thixotropy of soft clay, the reaction force of partition wall in deep soft soil area of caisson is similar to that of blade foot, and the reaction force of blade foot can be effectively reduced through the layering construction of caisson. (2) The height of caisson construction and the sand-bearing stratum will obviously affect the plane torsion angle of caisson. When the caisson enters the sand-bearing stratum, the lateral soil pressure increases significantly, which leads to the increase of the plane torsion angle. (3) The inclination and central deviation of caisson are sensitive to the caisson construction and stratum property. It can be found that the lateral soil pressure, plane torsion angle, inclination, and central deviation of caisson are sensitive to stratum property, and inhomogeneity of stratum easily leads to inclination of caisson. Based on the field monitoring data, the stress characteristics and geometric posture of caisson during sinking are studied, which provide technical guidance for scheme design and subsidence prediction analysis of caisson in deep marine soft clay. It can provide a good opportunity to study the behaviors of large caisson foundation constructed in deep marine soft clay and has great significance and reference value for construction optimization of anchorage structure.Xin YanWei ZhanZhi HuDanqiang XiaoYiqiang YuJinchang WangHindawi LimitedarticleEngineering (General). Civil engineering (General)TA1-2040ENAdvances in Civil Engineering, Vol 2021 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Engineering (General). Civil engineering (General) TA1-2040
spellingShingle	Engineering (General). Civil engineering (General) TA1-2040 Xin Yan Wei Zhan Zhi Hu Danqiang Xiao Yiqiang Yu Jinchang Wang Field Study on Deformation and Stress Characteristics of Large Open Caisson during Excavation in Deep Marine Soft Clay
description	Oujiang River North Estuary Bridge in Wenzhou is the world’s first double-deck suspension bridge under construction with three-tower and four-span. It is the first time to build large open caisson foundation in the deep marine soft clay in estuary with strong tide, extending the application scope of caisson. To study the deformation and stress characteristics of large open caisson during excavation and ensure the safety of anchorage excavation, a large number of sensors are arranged in the caisson. By analyzing the change of tip resistance, lateral soil pressure, and posture parameters during caisson excavation, the stress characteristics and deformation of caisson are described. The result shows the following. (1) Because of the thixotropy of soft clay, the reaction force of partition wall in deep soft soil area of caisson is similar to that of blade foot, and the reaction force of blade foot can be effectively reduced through the layering construction of caisson. (2) The height of caisson construction and the sand-bearing stratum will obviously affect the plane torsion angle of caisson. When the caisson enters the sand-bearing stratum, the lateral soil pressure increases significantly, which leads to the increase of the plane torsion angle. (3) The inclination and central deviation of caisson are sensitive to the caisson construction and stratum property. It can be found that the lateral soil pressure, plane torsion angle, inclination, and central deviation of caisson are sensitive to stratum property, and inhomogeneity of stratum easily leads to inclination of caisson. Based on the field monitoring data, the stress characteristics and geometric posture of caisson during sinking are studied, which provide technical guidance for scheme design and subsidence prediction analysis of caisson in deep marine soft clay. It can provide a good opportunity to study the behaviors of large caisson foundation constructed in deep marine soft clay and has great significance and reference value for construction optimization of anchorage structure.
format	article
author	Xin Yan Wei Zhan Zhi Hu Danqiang Xiao Yiqiang Yu Jinchang Wang
author_facet	Xin Yan Wei Zhan Zhi Hu Danqiang Xiao Yiqiang Yu Jinchang Wang
author_sort	Xin Yan
title	Field Study on Deformation and Stress Characteristics of Large Open Caisson during Excavation in Deep Marine Soft Clay
title_short	Field Study on Deformation and Stress Characteristics of Large Open Caisson during Excavation in Deep Marine Soft Clay
title_full	Field Study on Deformation and Stress Characteristics of Large Open Caisson during Excavation in Deep Marine Soft Clay
title_fullStr	Field Study on Deformation and Stress Characteristics of Large Open Caisson during Excavation in Deep Marine Soft Clay
title_full_unstemmed	Field Study on Deformation and Stress Characteristics of Large Open Caisson during Excavation in Deep Marine Soft Clay
title_sort	field study on deformation and stress characteristics of large open caisson during excavation in deep marine soft clay
publisher	Hindawi Limited
publishDate	2021
url	https://doaj.org/article/cd2850c8ce074378a7372bf7b892517f
work_keys_str_mv	AT xinyan fieldstudyondeformationandstresscharacteristicsoflargeopencaissonduringexcavationindeepmarinesoftclay AT weizhan fieldstudyondeformationandstresscharacteristicsoflargeopencaissonduringexcavationindeepmarinesoftclay AT zhihu fieldstudyondeformationandstresscharacteristicsoflargeopencaissonduringexcavationindeepmarinesoftclay AT danqiangxiao fieldstudyondeformationandstresscharacteristicsoflargeopencaissonduringexcavationindeepmarinesoftclay AT yiqiangyu fieldstudyondeformationandstresscharacteristicsoflargeopencaissonduringexcavationindeepmarinesoftclay AT jinchangwang fieldstudyondeformationandstresscharacteristicsoflargeopencaissonduringexcavationindeepmarinesoftclay
_version_	1718443137692598272

Field Study on Deformation and Stress Characteristics of Large Open Caisson during Excavation in Deep Marine Soft Clay

Ejemplares similares