Simulation of growth normal fault sandbox tests using the 2D discrete element method

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題名:	Simulation of growth normal fault sandbox tests using the 2D discrete element method
作者:	黃文昭;Chu, Sheng-Shin;Lin, Ming-Lang;Huang, Wen-Chao;Nien, Wei-Tung;Liu, Huan-Chi;Chan, Pei-Chen
貢獻者:	工學院土木工程學系
關鍵詞:	Basins;Computer simulation;computers;deformation;Discrete element method;drilling;Faults;Growth normal fault;infrastructure;Mathematical models;Sand;sandy soils;Shanchiao Fault;Slip;Soil (material);Taipei Basin;traffic
日期:	2015-01-01
上傳時間:	2026-04-21 13:53:28 (UTC+8)
出版者:	Elsevier Ltd.;Elsevier Ltd
摘要:	摘要： A fault slip can cause the deformation of shallow soil layers and destroy infrastructures. The Shanchiao Fault on the west side of the Taipei Basin is one such fault. The activities of the Shanchiao Fault have caused the quaternary sediment beneath the Taipei Basin to become deformed, damaging structures, traffic construction, and utility lines in the area. Data on geological drilling and dating have been used to determine that a growth fault exists in the Shanchiao Fault. In an experiment, a sandbox model was built using noncohesive sandy soil to simulate the existence of a growth fault in the Shanchiao Fault and forecast the effect of the growth fault on shear-band development and ground differential deformation. The experimental results indicated that when a normal fault contains a growth fault at the offset of the base rock, the shear band develops upward beside the weak side of the shear band of the original-topped soil layer, and surfaces considerably faster than that of the single-topped layer. The offset ratio required is approximately one-third that of the single-cover soil layer. In this study, a numerical simulation of the sandbox experiment was conducted using a discrete element method program, PFC2D, to simulate the upper-covering sand layer shear-band development pace and the scope of a growth normal fault slip. The simulation results indicated an outcome similar to that of the sandbox experiment, which can be applied to the design of construction projects near fault zones. •Simulation results revealed the ease of differentiating between a regular-normal fault and a growth normal fault.•The shear band could outcrop due to another offset event from the growth normal fault tip, even for thick sandy layers.•In a growth normal fault, the shear band continues from the end of the old shear band and develops upward. 出版者： Elsevier Ltd 出版日期： 2015-01 出處： Computers & geosciences, 2015-01, Vol.74, p.1-12 資源來源： Elsevier ScienceDirect 版權： 2014 Elsevier Ltd 識別號： ISSN: 0098-3004 識別號： EISSN: 1873-7803 識別號： DOI: 10.1016/j.cageo.2014.10.006
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