Full-Scale Field Impact Load Experiments on Buried Pipes in Geosynthetic-Reinforced Soils

BABAGİRAY G., Oguzhan Akbas S. O., ANIL Ö.

TRANSPORTATION GEOTECHNICS, cilt.38, 2023 (SCI-Expanded) identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 38
  • Basım Tarihi: 2023
  • Doi Numarası: 10.1016/j.trgeo.2022.100927
  • Dergi Adı: TRANSPORTATION GEOTECHNICS
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus, Geobase, INSPEC
  • Anahtar Kelimeler: Full-scale, Field test, Impact load, Buried pipe, Geosynthetics, Geocell, Geogrid, Strip geogrid, Geotextile, Composite geogrid, Composite strip geogrid
  • Gazi Üniversitesi Adresli: Evet

Özet

This paper introduces the results of eight full-scale impact load tests on soils reinforced with geocell, geogrid, strip geogrid, composite structures of both geogrid and strip geogrid and geotextiles of varying densities and thicknesses on buried HDPE (high-density polyethylene) pipes of 600 mm diameter and 2000 mm length. Two pressure cells were inserted into the soil, and two accelerometers instrumented the pipe to understand the geosynthetic protective layers' relative merit and pressure absorption capacities. A concrete cube block of 3125 N was dropped from a height of 3000 mm for impact loading. In addition to acceleration and pressure mea-surements, the relative costs of the geosynthetics used in the experiments were compared. Concerning the reference test, it was observed that geotextile (800 gr/m2) was the best-performing reinforcement material in terms of pressure absorption (46.6 %) and acceleration reduction capacities (83.3 %). Composite structures of both geogrid and strip geogrid performed better in acceleration and pressure absorption capabilities than their traditional counterparts. Considering the pressure absorption (9.5 %) and acceleration reduction (33.3 %), the material with the lowest performance was geocell. The most efficient application was provided by geogrid regarding on reduction in acceleration per unit cost. Comparing results with those obtained from previous laboratory-scale experiments indicates a general agreement.