Experimental investigation of current-induced local scour around composite bucket foundation in silty sand

2016 ◽  
Vol 117 ◽  
pp. 311-320 ◽  
Author(s):  
Tongshun Yu ◽  
Jijian Lian ◽  
Zhongqiang Shi ◽  
Hongzhen Wang
Keyword(s):  
Experimental Investigation ◽  
Local Scour ◽  
Silty Sand ◽  
Bucket Foundation

Behavior of a Monopod Bucket Foundation Subjected to Combined Moment and Horizontal Loads in Silty Sand

2021 ◽  
Vol 147 (5) ◽  
pp. 04021025
Author(s):  
Yun Wook Choo ◽  
Dong-Joon Kim ◽  
Jun-Ung Youn ◽  
Muhammad Shazzad Hossain ◽  
Jihun Seo ◽  
...  
Keyword(s):  
Silty Sand ◽  
Bucket Foundation

scholarly journals Experimental Investigation on Small-Strain Stiffness of Marine Silty Sand

2020 ◽  
Vol 8 (5) ◽  
pp. 360 ◽  
Author(s):  
Qi Wu ◽  
Qingrui Lu ◽  
Qizhou Guo ◽  
Kai Zhao ◽  
Pen Chen ◽  
...  
Keyword(s):  
Experimental Investigation ◽  
Void Ratio ◽  
Reduction Rate ◽  
Confining Pressure ◽  
Small Strain ◽  
Silty Sand ◽  
Bender Element ◽  
Small Strain Stiffness ◽  
Alternative State ◽  
State Index

The significance of small-strain stiffness (Gmax) of saturated composite soils are still of great concern in practice, due to the complex influence of fines on soil fabric. This paper presents an experimental investigation conducted through comprehensive bender element tests on Gmax of marine silty sand. Special attention is paid to the influence of initial effective confining pressure ( σ c 0 ′ ), global void ratio (e) and fines content (FC) on Gmax of a marine silty sand. The results indicate that under otherwise similar conditions, Gmax decreases with decreasing e or FC, but decreases with increasing FC. In addition, the reduction rate of Gmax with e increasing is not sensitive to σ c 0 ′ , but obviously sensitive to changes in FC. The equivalent skeleton void ratio (e*) is introduced as an alternative state index for silty sand with various FC, based on the concept of binary packing material. Remarkably, the Hardin model is modified with the new state index e*, allowing unified characterization of Gmax values for silty sand with various FC, e, and σ c 0 ′ . Independent test data for different silty sand published in the literature calibrate the applicability of this proposed model.

Numerical and experimental investigation of local scour downstream of a sill

2004 ◽  
pp. 615-621
Author(s):  
C Adduce ◽  
G Sciortino ◽  
M Morganti
Keyword(s):  
Experimental Investigation ◽  
Local Scour

Effect of infill materials on vibration isolation efficacy of geocell-reinforced soil beds

2020 ◽  
Vol 57 (9) ◽  
pp. 1304-1319 ◽  
Author(s):  
Hasthi Venkateswarlu ◽  
A. Hegde
Keyword(s):  
Experimental Investigation ◽  
Analytical Study ◽  
Vibration Isolation ◽  
Damping Ratio ◽  
Reinforced Soil ◽  
Silty Sand ◽  
Peak Acceleration ◽  
Infill Material ◽  
Mass Spring ◽  
Geocell Reinforcement

This paper investigates the isolation efficacy of geocell-reinforced foundation beds infilled with different materials through a series of block resonance tests. The geocell made with a novel polymeric alloy (NPA) was used in the experimental investigation. In total, five different cases — namely, unreinforced, geocell-reinforced silty sand, geocell-reinforced sand, geocell-reinforced slag, and geocell-reinforced aggregate — were considered. Presence of the geocell has resulted in improvement of screening efficacy of the foundation bed regardless of the infill material. The displacement amplitude of the geocell-reinforced bed cases was reduced by 68%, 64%, 61%, and 59%, respectively, for aggregate, slag, sand, and silty sand infill cases as compared to the unreinforced condition. Maximum isolation efficiency was observed in the presence of aggregate, among the four different infill materials. In the presence of aggregate infill, the shear modulus of the foundation bed was improved by 150%. Similarly, the peak particle velocity and peak acceleration were reduced by 57% and 48%, respectively. Further, the efficacy of mass spring dashpot (MSD) analogy was studied in predicting the frequency–displacement response of different reinforced cases. From the analytical study, a significant improvement in damping ratio of the foundation bed was observed in the presence of geocell reinforcement.

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