本研究針對土城實驗站之六座加勁擋土牆，探討現地黏性土壤回填對MSE wall之影響。此六座加勁擋土牆分別為SI-wall、S-wall、FI-wall、F-wall、ISFI-wall及ISF-wall，其中S代表低變形量、F代表FHAW、I代表次加勁材、IS代表現地黏性土壤。本研究利用架構於有限差分軟體FLAC下之NEARE程式，模擬分析逐層建造時，輾壓機夯實次數、降雨造成的靜水壓與高含水量回填土之孔隙水壓對加勁牆側向位移之影響。
本研究首先求取現地加勁牆回填土之三軸強度參數及加勁格網軸力與界面摩擦參數。接著以求得之參數，探討以現地土壤作為回填材料之SI-wall及S-wall加勁擋土牆側向變形。最後以更改加勁材埋設長度進行模擬探討不同埋設長度對安全係數之影響，並將成果整理出不同埋設長度在滑動及傾倒安全係數對位移及角度成曲線反比關係。

In order to understand the influence of in-situ fine soils to MSE walls, six geosynthetics reinforced retaining walls in the Tu-Cheng experiment station of NTUST were studied in this research. The names of these walls are SI-wall、S-wall、FI-wall、F-wall、ISFI-wall and ISF-wall, respectively. S means small strain, F means FHWA, I means intermediate filament, IS means in-site soils. A numerical analysis program, named NEARE, which was developed with FLAC, was used herein. The number of passing times of a roller, static pore water pressure due to rainfall and excess pore water pressure due to wet soils were studied to understand their effects to the side deformation of reinforced walls.
The soil parameters were investigated through triaxial compression tests. The interface parameters between soil and geosynthetics were obtained by pull-out tests. The side deformations of SI-wall and S-wall were then studied. The influence of embedded length of geosynthetics to the side deformations and safety factors were performed thereafter. So, the relationship between safety factors and displacement or tilt angles were proposed finally in this research

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