Abstract
Due to the thick silty soil layers and seismic effects in the western sea floor of Taiwan, group pile foundations are preferred for offshore wind turbine foundations. Because of the high uncertainties and complexities of soil-pile interactions in laterally loading conditions, the needs for proper understanding the soil-pile interactions in silty soils have raised. This paper presents the results of long pile push-over tests in a saturated silty sand under different stress conditions. A layered calibration chamber for CPT study is converted to apply compensated boundary stresses during the push-over phase to reduce the boundary effects in model tests. A model pile with bending strain gauges and tactile sensors for interface stress monitoring are embedded in the field simulator and lateral loads are applied on the pile top with different constrained conditions. The results reveal that the typical p-y curves for sand and clay are not applicable to local silty soils. The p-factor reduction from the sand curve should consider the field stress conditions and the compressibility of silty sand.
| Original language | Chinese |
|---|---|
| Pages (from-to) | 305-313 |
| Number of pages | 9 |
| Journal | Journal of the Chinese Institute of Civil and Hydraulic Engineering |
| Volume | 30 |
| Issue number | 4 |
| DOIs | |
| Publication status | Published - 2018 Dec 1 |
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All Science Journal Classification (ASJC) codes
- Civil and Structural Engineering
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長樁模型於飽和粉土質砂土中之樁土互制反應. / Chang, Wen-Jong; Hsiao, Ting Han; Chou, Shih Hsun.
In: Journal of the Chinese Institute of Civil and Hydraulic Engineering, Vol. 30, No. 4, 01.12.2018, p. 305-313.Research output: Contribution to journal › Article
TY - JOUR
T1 - 長樁模型於飽和粉土質砂土中之樁土互制反應
AU - Chang, Wen-Jong
AU - Hsiao, Ting Han
AU - Chou, Shih Hsun
PY - 2018/12/1
Y1 - 2018/12/1
N2 - Due to the thick silty soil layers and seismic effects in the western sea floor of Taiwan, group pile foundations are preferred for offshore wind turbine foundations. Because of the high uncertainties and complexities of soil-pile interactions in laterally loading conditions, the needs for proper understanding the soil-pile interactions in silty soils have raised. This paper presents the results of long pile push-over tests in a saturated silty sand under different stress conditions. A layered calibration chamber for CPT study is converted to apply compensated boundary stresses during the push-over phase to reduce the boundary effects in model tests. A model pile with bending strain gauges and tactile sensors for interface stress monitoring are embedded in the field simulator and lateral loads are applied on the pile top with different constrained conditions. The results reveal that the typical p-y curves for sand and clay are not applicable to local silty soils. The p-factor reduction from the sand curve should consider the field stress conditions and the compressibility of silty sand.
AB - Due to the thick silty soil layers and seismic effects in the western sea floor of Taiwan, group pile foundations are preferred for offshore wind turbine foundations. Because of the high uncertainties and complexities of soil-pile interactions in laterally loading conditions, the needs for proper understanding the soil-pile interactions in silty soils have raised. This paper presents the results of long pile push-over tests in a saturated silty sand under different stress conditions. A layered calibration chamber for CPT study is converted to apply compensated boundary stresses during the push-over phase to reduce the boundary effects in model tests. A model pile with bending strain gauges and tactile sensors for interface stress monitoring are embedded in the field simulator and lateral loads are applied on the pile top with different constrained conditions. The results reveal that the typical p-y curves for sand and clay are not applicable to local silty soils. The p-factor reduction from the sand curve should consider the field stress conditions and the compressibility of silty sand.
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U2 - 10.6652/JoCICHE.201812_30(4).0007
DO - 10.6652/JoCICHE.201812_30(4).0007
M3 - Article
VL - 30
SP - 305
EP - 313
JO - Journal of the Chinese Institute of Civil and Hydraulic Engineering
JF - Journal of the Chinese Institute of Civil and Hydraulic Engineering
SN - 1015-5856
IS - 4
ER -