臺灣博碩士論文加值系統

本文介紹美國FHWA規範和德國DIBT規範，兩種加勁擋土牆的設計流程，與設計上的基本要求和安全係數的取用，並使用EXCEL軟體建立兩個規範的計算程式。並進一步對德國規範DIBT的應用作探討。兩種計算表的設計需要分別滿足美國規範的外部穩定檢核與內部穩定檢核，及德國規範的外部穩定檢核與內部穩定檢核。分析採用相同設計參數包含：牆高(H)、加勁材長度(L)、底層埋設長度(B)、加勁區回填土內摩擦角(∅wall)、背填土區土壤內摩擦角(∅backfill)、原土層地基土壤內摩擦角(∅foundation)、加勁區回填土單位重(γwall)、背填土區土壤單位重(γbackfill)、原土層地基土壤單位重(γfoundation)。
依據德國DIBT規範的探討，外部穩定計算考慮兩種地基承載力的情況，一種是考慮最大載重作用情況，另一種是考慮最大傾覆破壞狀況，研究結果指出最大傾覆破壞狀況下的地基承載力安全係數FSb會小於最大載重作用情況的地基承載力安全係數FSb，由分析結果得知，只要最大傾覆破壞狀況下的FSb不小於規範所要求的值2，抗滑動安全係數FSs與最大載重作用情況的FSb均會大於規範要求(規範要求值: FSs≥1.5 ,FSb≥2)。由分析結果得知在外部穩定的安全係數不小於規範要求時，內部穩定的安全係數也會符合規範要求。

In this thesis, two kinds of specifications including design procedures, basic requirements, and safety factors for design of reinforced soil wall including FHWA of U.S.A. and DIBT of German were studied. Calculation sheets using EXCEL were developed. Further study by using DIBT specification was also included. The design needs to meet the requirements of both external stability and internal stability for each specification. Same design parameters were used for analysis including: height of wall (H), total length of reinforcement (L), bottom length of reinforcement (B), friction angle of reinforced fill (∅_wall), friction angle of retained fill (∅_backfill), friction angle of foundation (∅_foundation), unit weight of the reinforced backfill (γ_wall), unit weight of the retained backfill (γ_backfill), unit weight of soil (γ_foundation).
According to the study of German DIBT specifications, the external stability needs to consider two kinds of the bearing pressure on foundation soils. One is the condition of maximum load, and another is the condition of maximum overturning load. The results of study indicate safety factor of foundation bearing capacity (FS_b) obtained under the maximum overturning load is less than that of maximum load. The results also show that as long as the safety factor under maximum overturning load no less than 2.0 which is the value required by the specification, the requirement of safety factor for stability against sliding FS_s>1.5 and under the maximum load condition FS_b>2 will be satisfied. Rresults also indicate safety factors of internal stability will meet requirement when the safety factors of external stability are no less than those of required by specification.

目　　錄
誌　　謝 i
摘　　要 ii
Abstract iii
目　　錄 iv
圖目錄........................................................................................................ v
表目錄....................................................................................................... vi
符號說明: vii
第一章 緒論 1
1.1前言................................................................................................... 1
1.2研究目的 1
1.3研究內容與論文架構 2
第二章 文獻探討 3
2.1加勁擋土牆簡介 3
2.2加勁土壤原理 4
2.3地工合成材料介紹 5
2.4土壤與加勁材的互制行為 6
2.5加勁擋土牆的破壞機制 7
2.6加勁擋土牆的規範研究 11
第三章 規範設計流程與計算表的建立 12
3.1美國聯邦公路局加勁擋土牆規範FHWA-NHI-00-024 12
3.2德國加勁擋土牆規範DIBT Z 20.1-102 20
3.3規範的差異性 29
3-4美國規範計算 32
3-5德國規範計算 41
第四章 分析結果與討論 57
4.1本研究分析前提 57
4.2分析結果討論 58
第五章 結論與建議 68
5.1結論 ................................................................................................68
5.2建議 ................................................................................................68
參考文獻 69

參考文獻
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盟鑫股份有限公司，GESM永續綠色工程資訊網-綠色工程材料查詢-加勁格網，上網日期:2015年6月26日，檢自http://www.gesm.com.tw/Product/SearchIndex