本研究首先利用架構於有限差分軟體FLAC下之NEARE程式，探討以現地黏性土壤回填興建之SI1-wall加勁擋土牆，於逐層建造至完工時，受土壤濕潤與降雨造成的孔隙水壓、輾壓機夯實與次加勁材距牆面距離因素對加勁牆行為之影響。並且由假設土體內部分佈之孔隙水壓模擬興建完成後持續產生之側向位移。接著考慮上述各項因素，模擬同樣為現地黏性土壤回填興建之S1-wall、FI1-wall及F1-wall牆面側向位移。最後，單純就加勁材距牆面距離進行分析，以探討SI-wall及FI1-wall在不同次加勁材埋置位置對加勁牆水平變位之影響。
研究結果顯示，(1)施工期間降雨造成地下水位上升至牆高0.75m將使最底層加勁層側向位移增加與加勁材張力提高。(2)輾壓機夯實 使得牆面側向位移大為增加；增加滾壓次數，則受壓力影響範圍之加勁層側向位移以及加勁材張力會隨著滾壓次數增加而變大，但增加幅度趨緩。(3)於施工時，假設回填土因過於濕潤而存在一孔隙水壓力，則水壓力存在區域內，牆面側向位移將較無水壓力情況還大，且加勁材張力較高。(4)完工後，加勁牆受雨水入滲形成之水壓將造成加勁牆持續變形。(5)次加勁材埋設位置距牆面越遠則牆面側向位移越大，且主加勁張力增加，次加勁張力減少。當距離大於25cm，則牆面側向位移將接近無次加勁材之情況。

First, this research is to discuss the influence of the pore water pressure that overly wet soil and the rainfall causes, roller compaction and the distance between secondary reinforcement and wall face on static behavior of SI1-wall reinforced retaining wall backfilled with in situ cohesive soils during constructing, by using a finite difference computer program named NEARE, was constructed based upon FLAC. And according to a distribution of pore water pressure that assumed in this research, so as to simulate lateral wall face displacement that is taking place continuously after SI1-wall completion. Then consider all factor that mention before, simulate lateral wall face displacement of S1-wall, FI1-wall and F1-wall backfilled with same in situ cohesive soils. Finally, analyse on the factor of the distance between secondary reinforcement and wall face, in order to discuss the influence of different distance between secondary reinforcement and wall face on lateral wall face displacement of SI1-wall and FI1-wall.
The results of study shows that: (1) In the bottom, it will make the lateral wall face displacement and the tension stress of reinforcement improve when rainfall causes the groundwater rises to 0.75 meters during constructing. (2) The Roller compaction will make the lateral wall face displacement greatly increase; to raise the number of roller passes will increase the lateral wall face displacement and the tension stress of reinforcement on the pressure coverage, but the increase become reduce. (3) During constructing, the pore water pressure that overly wet soil causes exists, the lateral wall face displacement will be greater than this condition that has no pore water pressure in the area of water pressure function. And the tension stress of reinforcement is greater too. (4) The rainfall and permeation form pore water pressure will cause continually the lateral wall face displacement to to increase after wall completion. (5) The farer the distance between secondary reinforcement and wall face is, the bigger the lateral wall face displacement is. And the tension stress of main reinforcement increases, the tension stress of secondary reinforcement decreases. as the distance between secondary reinforcement and wall face greater than 25cm, the lateral wall face displacement wall be close to a condition that has no secondary reinforcement.

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