海底隧道强风化围岩海水腐蚀特性研究

Q2 Engineering

SDHM Structural Durability and Health Monitoring Pub Date : 2020-01-01 DOI:10.32604/sdhm.2020.07619

Peishuai Chen, Jun-jie Cao, Wei-zhong Chen, W. Rao

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引用次数: 0

摘要

现有的海底隧道耐久性研究主要集中在混凝土劣化和钢材腐蚀方面，而对围岩力学性能劣化对海底隧道耐久性的影响研究较少。为提高海底隧道长期稳定性预测的准确性，对海底隧道强风化围岩进行了海水腐蚀试验。本研究研究了不同海水浓度下强风化花岗岩重塑试样的强度特性，建立了海水腐蚀下的强度衰减方程，建立了化学损伤演化方程和模型参数，为分析围岩腐蚀弱化对隧道运行期内耐久性的影响提供了依据。

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Characteristics on Seawater Corrosion of Intensely Weathered Surrounding Rock of Subsea Tunnel

Existing studies on the durability of subsea tunnel mainly focus on the concrete deterioration and steel corrosion, while there are few on the influence of mechanical properties deterioration of surrounding rock on the durability of subsea tunnel. To improve the accuracy of long-term stability prediction, seawater corrosion tests of intensely weathered surrounding rock of subsea tunnel are carried out. In this study, the strength characteristics of remolded samples of intensely weathered granite under different seawater concentrations are investigated, the strength attenuation equation under seawater corrosion is established, and the chemical damage evolution equation and model parameters are formulated, The findings provides the basis for analyzing the influence of corrosion and weakening of surrounding rock on the durability of tunnel within the operation period.

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来源期刊

SDHM Structural Durability and Health Monitoring Engineering-Building and Construction

CiteScore

2.40

自引率

0.00%

发文量

期刊介绍： In order to maintain a reasonable cost for large scale structures such as airframes, offshore structures, nuclear plants etc., it is generally accepted that improved methods for structural integrity and durability assessment are required. Structural Health Monitoring (SHM) had emerged as an active area of research for fatigue life and damage accumulation prognostics. This is important for design and maintains of new and ageing structures.