scholarly journals Durability assessment of a tunnel structure with two‐sided chloride ingress—A case study located in a tropical environment

2021 ◽  
Author(s):  
Juan Daniel Cassiani ◽  
Margareth Dugarte ◽  
Carlos A Arteta ◽  
Sylvia Kessler
Keyword(s):  
Tropical Environment ◽  
Chloride Ingress ◽  
Tunnel Structure ◽  
Durability Assessment

scholarly journals The Construction Countermeasures of Shallow-Buried Small Spacing Tunnel Undercrossing Cultural Relic Buildings: A Case Study

2021 ◽  
Vol 2021 ◽  
pp. 1-10
Author(s):  
Li Wan ◽  
Jiajia Shen ◽  
Changan Zhang ◽  
Zanquan Lin ◽  
Hu Zhang
Keyword(s):  
Prevention And Control ◽  
Tunnel Structure ◽  
Construction Monitoring ◽  
Deformation Control ◽  
Control Scheme ◽  
Reconstruction Project ◽  
Cultural Relic ◽  
And Control ◽  
Small Spacing

Based on the background of the reconstruction project from Changqing Chenzhuang-Pingyin section of G220 east-deep line in China, a special tunnel structure and construction plan was carried out according to the construction measures of the shallow-buried small spacing tunnel passing underneath cultural relic buildings, and a comprehensive deformation control scheme of “CRD construction method single-arm excavation + surface grouting prereinforcement + advanced large pipe shed presupport” was put forward. The results of numerical simulation and on-site construction monitoring showed that the overall deformation of aqueduct foundation generally increases first, then decreases and increases again, and finally tends to be stable. The effects of surface grouting prereinforcement and advance large pipe shed presupport are obvious. The comprehensive deformation control scheme can ensure the safety of the existing construction and meet the safety prevention and control requirements.

scholarly journals The SHM system as a data source for durability assessment. Case study of Rędziński Bridge stay cable system

2018 ◽  
Vol 219 ◽  
pp. 03012
Author(s):  
Marco Teichgraeber ◽  
Paweł Hawryszków
Keyword(s):  
Health Monitoring ◽  
Probabilistic Method ◽  
Concrete Bridge ◽  
Basic Information ◽  
Stay Cable ◽  
Cable System ◽  
Stay Cables ◽  
Durability Assessment ◽  
Data Source

The paper is an introduction to a durability assessment algorithm based on the data collected by a Structural Health Monitoring (SHM) system of a cable-stayed concrete bridge. It contains basic information about the structure of the Rędziński Bridge and its monitoring system. The collected data from the first years are described and analysed. Later the algorithm to assess the durability of stay cables based on probabilistic method is presented.

Microwave Tomography-Enhanced GPR in Forensic Surveys: The Case Study of a Tropical Environment

2016 ◽  
Vol 9 (1) ◽  
pp. 115-124 ◽  
Author(s):  
Emerson Rodrigo Almeida ◽  
Jorge Luis Porsani ◽  
Ilaria Catapano ◽  
Gianluca Gennarelli ◽  
Francesco Soldovieri
Keyword(s):  
Tropical Environment ◽  
Microwave Tomography

scholarly journals Comparison of Leak Detection Methods Used for Testing Large Area Membrane Roofs for Durability Assessment Purposes

2021 ◽  
Vol 31 (3) ◽  
pp. 37-53
Author(s):  
Barbara Ksit ◽  
Maria Ratajczak ◽  
Agata Żylińska
Keyword(s):  
Environmental Factors ◽  
Polymeric Membranes ◽  
Detection Methods ◽  
Membrane Systems ◽  
Large Area ◽  
Different Types ◽  
Durability Assessment ◽  
Waterproofing Membrane

Abstract This article presents different types of commercially available roof waterproofing membrane systems used on roofs with large surface area. It deals with the causes of deterioration of such membranes due to environmental factors and describes the tests used to detect leaks and determination of the severity of deterioration of polymeric membranes taking into account the properties declared by their manufactures. The last part of the article is a case study comparing a brand new membrane with a membrane after 27 years in service.

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