Experimental Investigations on Effect of Geocell, Waste Tire Chips, and Geocell–Tire Chips on Foundation Reinforcement
Publication: Journal of Performance of Constructed Facilities
Volume 33, Issue 6
Abstract
Model tests were conducted for sand foundations reinforced by geocells, waste tire chips, and geocell–tire chips. Three factors related to the foundation performance are mainly examined in the current study: the embedded depth of the first layer of the geocells, the vertical spacing of geocell layers, and the content of waste tire chips. The experimental results indicate that, for a geocell-reinforced foundation, the optimal value of the vertical spacing and embedding depth is 0.2 time the footing width. The bearing capacity of the tire chips-reinforced foundation increases with the tire chips content when this content is within 8% and then decreases as the content of the tire chips increases. The optimal content of the tire chips is found to be approximately 8% by weight of the sand mixture. The performance of the geocell–tire chips composite reinforcement is superior to that of the reinforcement with only geocells. The vertical and lateral displacements of the composite-reinforced foundation are reduced remarkably and distributed more evenly. For instance, the vertical displacement under 2.5 MPa load is only 16 mm. The earth pressure of the composite foundation is significantly reduced as well. The discrepancy in the stress of the sand foundation and the reinforced foundation will be less obvious as the foundation depth increases. The diffusion effect of the reinforcement materials on the stress is mainly distributed in the vicinity of the reinforcement, with little influence on the part far away from the reinforcement materials.
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Acknowledgments
We are thankful for the financial support given by the National Natural Science Foundation of China (Nos. 51678224 and 51778217), the Hubei Provincial Science Foundation for Distinguished Young Scholars (No. 2018CFA063), Hubei Central Special Fund for Local Science and Technology Development (Nos. 2019ZYYD053 and 2018ZYYD005) and National Program on Key Research Project of China (No. 2016YFC0502208).
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Published In
Journal of Performance of Constructed Facilities
Volume 33 • Issue 6 • December 2019
Copyright
©2019 American Society of Civil Engineers.
History
Received: Sep 19, 2018
Accepted: Apr 18, 2019
Published online: Sep 24, 2019
Published in print: Dec 1, 2019
Discussion open until: Feb 24, 2020
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