Protection of Buried Pipe under Repeated Loading by Geocell Reinforcement
| Autor: | N. Joz Darabi, Omid Khalaj, S.N. Moghaddas Tafreshi, Bohuslav Mašek |
|---|---|
| Rok vydání: | 2017 |
| Předmět: |
education.field_of_study
Embedment Settlement (structural) 010102 general mathematics Population 0211 other engineering and technologies Full scale 02 engineering and technology 01 natural sciences Pipeline transport Geotechnical engineering High-density polyethylene 0101 mathematics Reinforcement education Displacement (fluid) Geology 021101 geological & geomatics engineering |
| Zdroj: | IOP Conference Series: Earth and Environmental Science. 95:022030 |
| ISSN: | 1755-1315 1755-1307 |
| Popis: | With increase in cities' population and development of urbane life, passing buried pipelines near ground's surface is inevitable in urban areas, roads, subways and highways. This paper presents the results of three-dimensional full scale model tests on high-density polyethylene (HDPE) pipe with diameter of 250 mm in geocell reinforced soil, subjected to repeated loading to simulate the vehicle loads. The effect of geocell's pocket size (55*55 mm and 110*110 mm) and embedment depth of buried pipe (1.5 and 2 times pipe diameter) in improving the behaviour of buried pipes was investigated. The geocell's height of 100 mm was used in all tests. The repeated load of 800 kPa was applied on circular loading plate with diameter of 250 mm. The results show that the pipe displacement, soil surface settlement and transferred pressure on the pipe's crown has been influenced significantly upon the use of geocells. For example, the vertical diametric strain (VDS) and soil surface settlement (SSS), in a way that using a geocell with pocket size of 110*110 mm reduces by 27% and 43%, respectively, compared with the unreinforced one. Meanwhile, by increasing buried depth of pipe from 1.5D to 2D, the use of geocell of 110*110 mm delivers about 50% reduction in SSS and VDS, compared with the unreinforced soil. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|