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| Centrifugal test on settlement of tram pile plate structure embankment
in deep soft area |
| WANG Changdan1，2，CHEN Kaixiang1，2，SHAN Yao1，2，ZHOU Shunhua1，2，WANG Binglong1，2，LI Liang1，2 |
| (1. Key Laboratory of Road and Traffic Engineering of the Ministry of Education，Tongji University，Shanghai 201804，China；
2. Shanghai Key Laboratory of Rail Infrastructure Durability and System Safety，Tongji University，Shanghai 201804，China) |
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Abstract The tram pile plate structure，a new embankment structure，is proposed in recent years. In order to achieve the purpose of bearing the upper load by the piles and soil between the piles，friction piles with sparse arrangement are used in the embankment. The embankment settlement and soil displacement field of the tram pile plate structure are studied by centrifugal model test. The results show that the tram embankment settlement meets the requirements of the code. The upper load is shared by piles and soil between piles，and there is no void under the plate. Pile length and pile spacing have a significant effect on embankment settlement. The embankment settlement increases with the increase of pile spacing，while it decreases with the increase of pile length. The embankment settlement increases gradually at the initial stage of operation. In the later stage of operation，the increasing degree of embankment settlement is small，and the embankment settlement tends to be stable. The settlement of the soil around pile decreases gradually along the depth，and there is an inflection point near the pile end. The relative displacement of pile-soil does not have a negative value and gradually increases with the depth. The settlements of the soil on pile tip and under plate are the same. There is differential settlement between the soil around the pile and in the middle of the span. The greater the depth，the more obvious the difference.
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2022, Vol. 41 
