Analysis on Mathematical Models for the Protection Solutions of a Major Sewage Collector

3rd World Multidisciplinary Civil Engineering, Architecture, Urban Planning Symposium

土木建筑工程;文学

Gaftoi, Daniel^1 ; Bugnariu, Tudor^1

Technical University of Civil Engineering Bucharest, Lacul Tei Blvd., sector 2, 124, 020396 Bucharest, Romania^1

关键词: Cylindrical structure;    Design recommendations;    Infrastructure development;    Loading condition;    Protection structure;    Public facilities;    Sewage collectors;    Strength capacity;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/471/5/052008/pdf
DOI  :  10.1088/1757-899X/471/5/052008

学科分类：土木及结构工程学

来源: IOP

【 摘 要 】

The infrastructure development can lead to circumstances in which new roads affect the existing underground public facilities, serving the neighbouring areas. In order to connect the A3 highway with a main road in Bucharest, a new junction arm is planned, crossing on top one of the major existing sewage collectors (a 3.5 m diameter cylindrical structure made of precast segments with interior lining). The paper presents the numerical analyses using 2D of two protection solutions suggested for the collector: (1) a reinforced concrete slab supported on bored piles; (2) a self-standing reinforced concrete arch calotte. Concurrently, a third solution suggested by the contractor was dismissed (protection using a corrugated metal arch structure with independent foundations). All the loading conditions were considered: earth fill and road structure weight, traffic and exceptional water pressure inside the collector. The results (expressed by the annular and sectional stresses) were compared to the collector's strength capacity. Advantages and disadvantages of each solution were emphasized and design recommendations for the protection structures were made.