Open AccessSettlement and damage analysis of working shaft for underground high-voltage electricity cables
Author(s) -
YanFeng Wang,
Jingen Guo,
Yongfeng Tang,
Liu Tingjin,
Yubing Yang
Publication year - 2019
Publication title -
iop conference series. earth and environmental science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.179
H-Index - 26
eISSN - 1755-1307
pISSN - 1755-1315
DOI - 10.1088/1755-1315/304/3/032063
Subject(s) - settlement (finance) , electricity , cracking , differential (mechanical device) , tension (geology) , geotechnical engineering , structural engineering , engineering , forensic engineering , geology , mining engineering , environmental science , materials science , electrical engineering , computer science , ultimate tensile strength , composite material , aerospace engineering , world wide web , payment
Working shafts or manholes, usually made of concrete or reinforced concrete, are essential parts of the underground electrical power transmission system. However, the working shaft frequently encountered differential settlement, tilt and other damage like cracking when construction activity was carried out near the high-voltage electricity cables. This paper reported a severe damaged working shaft in South China including its settlement and cracks. Numerical simulation was also performed to reveal the evolution of structural damage with an increased differential settlement. The results show a good agreement with field observation in respect to the initiation of concrete tension damage. It is proposed that if a differential settlement higher than 5mm is observed, preventative measures are needed and the risk is conditional acceptable.