›› 2015, Vol. 36 ›› Issue (S1): 491-495.doi: 10.16285/j.rsm.2015.S1.085

• Geotechnical Engineering • Previous Articles     Next Articles

Comparison study of reinforcement effect of HDPE/PET geogrids in fill embankment

JIA Min-cai1, 2, QIANG Xiao1, YE Jian-zhong3   

  1. 1. Department of Geotechnical Engineering, Tongji University, Shanghai 200092, China; 2. Key Laboratory of Geotechnical and Underground Engineering of Ministry of Education, Tongji University, Shanghai 200092, China; 3. Zhejiang Provincial Institute of Communications Planning, Design & Research, Hangzhou, Zhejiang 310006, China
  • Received:2015-03-17 Online:2015-07-11 Published:2018-06-14

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Abstract: In order to figure out the difference of reinforcement effect between high-density polyethylene(HDPE) geogrids and polyethylene terephthalate(PET) geogrids in fill embankment with wrapped face, based on tensile tests of two geogrids, this paper analyzes the force-deflection characteristics of two different geogrids-reinforced embankment by means of FLAC3D and some in-situ tested data. The results show that the mechanical properties of geogrids have an obvious influence on the displacement of reinforced embankment; and the influence is related to its overlying earth pressure. In the middle and lower part of the embankment, because of the higher earth pressure value, there exists a relatively huge variance in strain value of HDPE geogrids along its length, and the variance of strain value of PET geogrids is within a narrow range; in the upper part of the embankment, the less earth pressure value leads to the lower strain value of geogrids and there is no various strain difference between the two types of geogrids. PET geogrids are better than HDPE geogrids in the effect of controlling displacement of the reinforced embankment. The distribution of vertical and horizontal earth pressures has less difference between PET and HDPE reinforced embankment.

Key words: high-density polyethylene/polyethylene terephthalate (HDPE/PET) geogrids, reinforced embankment, FLAC3D, geogrids strain, horizontal displacement

CLC Number: 

  • U 416.1
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