Model Tests of Geocell Retaining Structures
Date Issued
2005
Date
2005
Author(s)
Chiu, You-Min
DOI
zh-TW
Abstract
Geocell is a new developing material for geosynthetics. It can offer confining pressures for soils to increase the bearing capacity and prevent soil erosion. In addition, geocell can be vegetation to improve the ecology of engineering and environment. The applications of geocell include the soil bearing capacity, erosion control, slope stability, and slope protection etc.
The purpose of this study is to investigate the structure deformation, backfill settlement and failure modes of the geocell retaining structures through model tests in a sandbox. Geocell models were made through similarity analysis. The main variables for model tests include the structure height, the structure inclination, surcharge loading type and the construction form of geocell retaining structures.
The result of the model tests shows that the structure displacement and backfill settlement will rise with the increasing structure inclination and surcharge loading. The maximum horizontal displacement of geocell gravity retaining structures is located on the wall top. Additionally, the failure modes of geocell gravity retaining structures include layer block sliding and overall overturning failure. When the model and backfill are under pressure together, the maximum displacement is located near the 0.3 times of the wall height. However, Backfill reinforce can reduce the displacement and settlement effectively. While backfill upper layers are being reinforced, the maximum horizontal displacement nearly takes place in half wall height. Nevertheless, while backfill lower layers are being reinforced, the maximum horizontal displacement is located on the wall top.
Subjects
蜂巢格網
邊坡穩定
模型試驗
破壞型式
Geocell
slope stability
model tests
failure modes
Type
thesis
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