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作者:

Wu, Qi (Wu, Qi.) | Qin, You (Qin, You.) | Wang, Luyang (Wang, Luyang.) | Liu, Qifei (Liu, Qifei.) | Zhuang, Haiyang (Zhuang, Haiyang.) | Chen, Guoxing (Chen, Guoxing.)

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摘要:

Using a hollow-cylinder torsional shear apparatus, we experimentally investigated the development character-istics of excess pore water pressure (EPWP) in saturated marine coral sand. These coral sand specimens were tested under various values of nonplastic fines content (FC), relative density (Dr), and cyclic stress ratio (CSR). A laboratory cyclic torsional shear test under isotropic consolidation showed that the development rate of the EPWP ratio (Ru) versus the number of cycles (N) increased with increasing FC and CSR but decreased with increasing Dr. Additionally, the increase in FC significantly reduced the cyclic resistance ratio (CRR) of marine coral sand. For a given Dr and FC, Ru of the specimens under different CSR was uniquely related to the amplitude of the shear strain (& gamma;a). Moreover, a pore pressure evaluation model based on shear strain characteristics was established. The measurements showed that the EPWP model parameter A is a soil-specific constant, and the density-corrected EPWP model parameter B/(Dr)1.5 has a single negative-power relationship with the equivalent skeleton void ratio (e*sk.

关键词:

Fines content Equivalent skeleton void ratio Excess pore water pressure Shear strain Marine coral sand

作者机构:

  • [ 1 ] [Wu, Qi]Nanjing Tech Univ, Inst Geotech Engn, Nanjing 210009, Peoples R China
  • [ 2 ] [Qin, You]Nanjing Tech Univ, Inst Geotech Engn, Nanjing 210009, Peoples R China
  • [ 3 ] [Wang, Luyang]Nanjing Tech Univ, Inst Geotech Engn, Nanjing 210009, Peoples R China
  • [ 4 ] [Liu, Qifei]Nanjing Tech Univ, Inst Geotech Engn, Nanjing 210009, Peoples R China
  • [ 5 ] [Zhuang, Haiyang]Nanjing Tech Univ, Inst Geotech Engn, Nanjing 210009, Peoples R China
  • [ 6 ] [Chen, Guoxing]Nanjing Tech Univ, Inst Geotech Engn, Nanjing 210009, Peoples R China
  • [ 7 ] [Wu, Qi]Beijing Univ Technol, Fac Architecture Civil & Transportat Engn, Beijing 100124, Peoples R China

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来源 :

APPLIED OCEAN RESEARCH

ISSN: 0141-1187

年份: 2023

卷: 137

4 . 3 0 0

JCR@2022

ESI学科: ENGINEERING;

ESI高被引阀值:19

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SCOPUS被引频次: 12

ESI高被引论文在榜: 0 展开所有

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