滨海软土沉管隧道结构性能演化规律及成因分析

谢雄耀; 张乃元; 周彪; 王晓佳

doi:10.13204/j.gyjzG20102911

滨海软土沉管隧道结构性能演化规律及成因分析

doi: 10.13204/j.gyjzG20102911

1. 同济大学土木工程学院, 上海 200092;
2. 上海市市政公路工程检测有限公司, 上海 200031

基金项目:

国家重点研发计划资助项目（2018YFC0809601）；国家自然科学基金重点项目（52038008）；上海城投集团有限公司科技创新计划资助项目（CTKY-ZDXM-2019-010）；浙江省交通厅科技计划资助项目（2021014）；云南省交通运输厅科技计划资助项目（云交科教〔2016〕160号-（四））。

详细信息

作者简介:
谢雄耀,男,1972年出生,教授,博士。

通讯作者:
张乃元,男,1996年出生,硕士研究生,wingsdom@sina.com。

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- 文章访问数: 125
- HTML全文浏览量: 24
- PDF下载量: 5
- 被引次数: 0
出版历程
- 收稿日期: 2020-10-29
- 网络出版日期: 2021-11-11

ANALYSIS ON EVOLUTION LAWS AND CAUSES OF STRUCTURE PERFORMANCES FOR COASTAL IMMERSED TUNNELS IN SOFT SOIL

1. College of Civil Engineering, Tongji University, Shanghai 200092, China;
2. Shanghai Municipal Highway Engineering Testing Co., Ltd., Shanghai 200031, China

摘要

摘要: 鉴于我国沉管隧道运营期服役安全鉴定和进一步维修养护决策亟需相应技术支撑和参考依据，为研究沉管隧道结构长期性能演化的规律及其成因，对上海外环隧道长期沉降、接头水压及裂缝、渗水、露筋、覆土厚度等多项数据进行对比分析，揭示了沉管隧道病害的主要分布特征、结构性能的发展规律及各类常见病害的成因。结果表明：外环隧道存在显著的不均匀沉降，部分区段至今未达稳定；止水损伤的接头内存在水压，水压随温度季节性变化的现象反映了接头的伸缩；上海外环隧道结构性能存在"地基垫层、覆土荷载—不均匀沉降—结构受力变形—荷载裂缝开展—渗水、露筋锈蚀"的劣化链。
- 沉管隧道 /
- 性能演化 /
- 结构病害 /
- 不均匀沉降
Abstract: In view of the urgent need of dependably technical supports and guidance in safety appraisals and further maintenance decisions for immersed tunnels in operation in China, to explore the long-term evolution laws and causes of structural performances for immersed tunnels, an analysis comparison was conducted on investigated data from Waihuan Tunnel in Shanghai involving long-term subsidence, water pressure in gaskets between segment joints,cracks in segments,quantities of water seepage and bare rebars,and thickness of overlaying soil,the main distribution characteristics of damage, evolution laws of structural properties, and causes of common damage were revealed. The results showed that subsidence was significant uneven along Waihuan Tunnel in Shanghai, in which the subsidence in some sections was not steady yet. Water pressure was measured in gaskets between segment joints of being damaged in waterproof, the seasonal variations of water pressure by temperature reflected the expansion and contraction of segment joints. A main chain of the performance deterioration for Waihuan Tunnel in Shanghai was revealed, that was the poor foundation and heavier loads from overlaying soil caused the uneven subsidence and then led to a series of quality issues that were the deformation of the structure, the evolution of cracks, the water seepage, the exposure and corrosion of rebars in series.
- immersed tunnel /
- performance evolution /
- structural damage /
- uneven subsidence

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