GPR applied to mapping utilities along the route of the Line 4 (yellow) subway tunnel construction in Sao Paulo City, Brazil

Autor(es)

Porsani, Jorge Luis ^[1] ; Ruy, Yang Boo ^[1] ; Ramos, Fernanda Pereira ^[2] ; Yamanouth, Gisele R. B. ^[3]

Afiliação do(s) autor(es)

^[1] Univ Sao Paulo, Inst Astron Geofis & Ciencias Atmosfer IAG, Dept Geofis, BR-05508090 Sao Paulo - Brazil

^[2] Consorcio Via Amarela, Sao Paulo - Brazil

^[3] Consorcio Geral Projetistas, Sao Paulo - Brazil

• Tipo de documento: Artigo Científico
• Fonte: JOURNAL OF APPLIED GEOPHYSICS; v. 80, p. 25-31, MAY 2012.
• Citações Web of Science: 22

Resumo

The rapid industrial development and disorganized population growth in huge cities bring about various urban problems due to intense use of physical space on and below the surface. Subsurface problems in metropolitan areas are caused by subway line construction, which often follows the routes of utility networks, such as electric and telephone cables, water and gas pipes, storm sewers, etc. Usually, the main problems are related to damage or destruction of preexisting utilities, often putting human lives at risk. With the purpose of minimizing risks. GPR-profiling with 200 MHz antennae was done at two sites, both located in downtown Sao Paulo, Brazil. The objectives of this work were to map utilities or existing infrastructure in the subsurface in order to orient the construction of the Line 4 (yellow) subway tunnel in Sao Paulo. GPR profiles can detect water pipes, utility networks in the subsurface, and concrete foundation columns or pilings in subsoil up to 2 m depth. In addition. the GPR profiles also provided details of the target shapes in the subsurface. GPR interpretations combined with lithological information from boreholes and trenches opened in the study areas were extremely important in mapping of the correct spatial distribution of buried utilities at these two sites in Sao Paulo. This information improves and updates maps of utility placement, serves as a basis for planning of the geotechnical excavation of the Line 4 (yellow) subway tunnel in Sao Paulo, helps minimize problems related to destruction of preexisting utilities in the subsoil, and avoids risk of dangerous accidents. (C) 2012 Elsevier B.V. All rights reserved. (AU)

• Processo FAPESP: 12/00603-4 - GPR aplicado para mapear utilitários ao longo da rota da Linha 4 (amarela) da construção do túnel do metrô na cidade de São Paulo, Brasil
• Beneficiário: Jorge Luís Porsani
• Modalidade de apoio: Auxílio à Pesquisa - Publicações científicas - Artigo
• Processo FAPESP: 02/07509-1 - Caracterização geofísica de alvos rasos com aplicações no planejamento urbano, meio ambiente e arqueologia: estudo sobre o sítio controlado do IAG/USP
• Beneficiário: Jorge Luís Porsani
• Modalidade de apoio: Auxílio à Pesquisa - Regular