Field Test Study on Dynamic Stress Characteristics of Sand Soil

2011 ◽  
Vol 243-249 ◽  
pp. 3285-3288
Author(s):  
Xiu Guang Song ◽  
Kai Yao ◽  
Zhi Gang Dou ◽  
Yang Yang
Keyword(s):  
Field Test ◽  
Dynamic Stress ◽  
Large Field ◽  
Sand Soil ◽  
The Third ◽  
Iron Slag ◽  
Test Study ◽  
Stress Diffusion ◽  
Dynamic Consolidation ◽  
Soil Dynamic

In order to understand the dynamic stress diffusion rule of the waste iron slag (sand soil) during dynamic consolidation, we conducted a large field test. The propagation and attenuation of dynamic stress in each ramming strike was recorded through the resistance strain gauge. It was shown that the dynamic stress caused by dynamic consolidation is pretty obvious. The dynamic stress dissipates extremely fast during the dynamic consolidation, the time is only 0.5s after plus the aftermath. The soil dynamic stress has heart-shaped distribution during the compaction. The dynamic stress value increases with the tamping hit number, but it keeps stable after about the third hits.

Reserch of Horizontal Dynamic Stress Distribution on Dynamic Consolidation of Discarded Iron Slag

2011 ◽  
Vol 250-253 ◽  
pp. 2959-2964
Author(s):  
Xiu Guang Song ◽  
Zhi Gang Dou ◽  
Kai Yao ◽  
Yang Yang
Keyword(s):  
Numerical Simulation ◽  
Dynamic Stress ◽  
Simulation Analysis ◽  
Dynamic Compaction ◽  
Experimental Program ◽  
Practical Application ◽  
Iron Slag ◽  
Dynamic Consolidation ◽  
Finite Element Numerical Simulation ◽  
Dynamic Stress Distribution

Dynamic consolidation has been widely used in many engineering fields. But in the use of discarded iron slag filled embankment, because the discarded iron slag is naturally piled up, multi-size particle mixture and backfilling height is relatively high, the effect of simple dynamic compaction is not obvious. This paper, combined with engineering examples, through the dynamic consolidation test, describes the experimental program, arrangement and spacing of tamping point, and matters need to be taken care in construction. It also explains the horizontal effects in consolidation by detection data analysis of waste iron slag roadbed. In this paper, we have established finite element numerical simulation analysis of dynamic consolidation by using FLAC3D. It is available in roadbed practical application and can be reference in similar projects of dynamic consolidation.

IMOM Field Test Study and Accuracy Verification.

1998 ◽  
Author(s):  
Fred Levien ◽  
Paul Buczynski
Keyword(s):  
Field Test ◽  
Test Study

scholarly journals Acceleration, Deceleration and Dynamic Stress Load in Elite Hurling: A Between-Quarter and Between-Position Comparison

Sports ◽  
2021 ◽  
Vol 9 (1) ◽  
pp. 10
Author(s):  
Damien Young ◽  
Giuseppe Coratella
Keyword(s):  
Dynamic Stress ◽  
Current Data ◽  
Running Performance ◽  
The Third ◽  
Stress Load ◽  
Record Data

This study described the decrement in accelerations, decelerations and dynamic stress load (DSL) between quarters in elite hurling. GPS (10-Hz) were used to record data from 42 players over 22 games (2018–2020 season). The number of accelerations and decelerations and DSL between quarters were assessed. Accelerations and decelerations were greater in Q1 than Q2 (ES = 0.28 and ES = 0.44, respectively), and Q4 (ES = 0.57 and ES = 0.60, respectively), and in Q3 compared to Q4 (ES = 0.50 and ES = 0.44, respectively). The DSL was 56 ± 21 AU in Q1, 56 ± 20 AU in Q2, 52 ± 20 AU in Q3 and 56 ± 24 AU in Q4. There was a decrease in DSL in Q3 compared to Q1 (ES = −0.20) and Q2 (ES = −0.20). Each position experienced a temporal decrease in at least one quarter (ES = 0.43–1.46) in all metrics except full-backs’, half-backs’ and full forwards’ accelerations, midfielders’ decelerations and midfielders’ and half forwards’ DSL. Current data show temporal decrements in running performance in Q2 and Q4 and DSL in Q3. Players should be conditioned to minimize the drop-off in running performances following the third quarter.

Analysis on Dynamic Transfer Characteristics of Low Geosynthetic-Reinforced Embankments Supported by CFG Piles Subjected to High-Speed Railway

2011 ◽  
Vol 368-373 ◽  
pp. 2575-2580 ◽  
Author(s):  
Long Long Fu ◽  
Quan Mei Gong ◽  
Yang Wang
Keyword(s):  
Field Test ◽  
High Speed ◽  
Dynamic Stress ◽  
Numerical Study ◽  
High Stress ◽  
High Speed Train ◽  
High Speed Railway ◽  
Railway Line ◽  
Transfer Characteristics ◽  
Reinforced Embankments

To investigate the dynamic transfer characteristics of low geosynthetic-reinforced embankments supported by CFG piles under high-speed train load, a numerical study has been conducted through dynamic finite element method on basis of the dynamic field test on a cross-section of Beijing-Shanghai high-speed railway. The comparative analysis on results of numerical study and field test indicated the distribution characteristics of vertical dynamic stress induced by high-speed train load in subgrade soil under railway line. The numerical results also suggested a high stress area in subgrade where vertical dynamic stress is over 1kPa. Conclusions of this work can provide reference for both design and estimation of long-term settlement of low geosynthetic-reinforced embankments supported by CFG piles for high-speed railway.

Field Test Study on Treatment of Dredged Soil with Cotton Straw

2020 ◽  
Vol 57 (4) ◽  
pp. 343-350
Author(s):  
Xiaojuan Yu ◽  
Chao Liu ◽  
Fenglin Lu
Keyword(s):  
Field Test ◽  
Dredged Soil ◽  
Test Study

scholarly journals Field test study on expansive soil canal of middle route of South to North Water Diversion Project

2016 ◽  
Vol 2 (75) ◽  
pp. 2600-2605
Author(s):  
Biwei Gong ◽  
Zhanlin Cheng ◽  
Jun Tong ◽  
Jun Liu ◽  
Ming Liu
Keyword(s):  
Field Test ◽  
Expansive Soil ◽  
Water Diversion ◽  
Test Study ◽  
Water Diversion Project ◽  
North Water
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