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研究生：	劉俊賢 Liu, Chun-Hsien
論文名稱：	鋼針模型加勁式擋土構造之行為研究 On the Behavior of Reinforced Structure via Steel-Rod Model
指導教授：	常正之 Charng, J.J.
學位類別：	碩士 Master
系所名稱：	工學院 - 土木工程學系 Department of Civil Engineering
論文出版年：	2004
畢業學年度：	92
語文別：	中文
論文頁數：	163
中文關鍵詞：	鋼針模型、加勁
外文關鍵詞：	Reinforced, Steel-Rod
相關次數：	點閱：62 下載：3
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　　土壤加勁的技術在近三十年迅速發展並廣泛使用，土釘擋土工法由於其施工上時間與費用優勢，且適合應用在生態保護概念的施工，因此近年備受矚目；但是對於此類加勁式構造物其結構體內的互制情形尚有不清楚之處。本研究建立一鋼針傾斜箱模型，利用鋼針特具之二維的性質，突破一般砂箱模型的限制而得以觀察加勁邊坡模型在破壞過程中的發展，並探討不同面版勁度、不同加勁長度及不同加勁層數等配置之下，模型的破壞行為與穩定性的變化。

　　由試驗結果顯示，勁度低的面版較容易出現局部破壞的發生，而其穩定性在短加勁材料配置下並無法有效率的提升；但是當加勁材料長度達到某一門檻長度之後，面版勁度對穩定性的影響將不明顯。而且由模型破壞過程的觀察，加勁區域形成一體化而類似塊體的滑動；破壞面位置與破壞型態與加勁形式息息相關，而其亦產生相應之變化，因此就加勁材構造物的分析與設計，應考慮加勁材料對整體行為的影響。

　　The reinforced technique has developed rapidly in these thirty years and used extensively. Because of the advantages in time consuming, constructing cost and suitable for the ecological construction, the soil nailing method was gazed by engineers. But there are still some unclear points in the intersection inside the structure with reinforcements. In the study, we establish a steel-rod tilting box model and take the advantages of steel rods that general sand box model can’t. In the steel-rod tilting model, due to a 2-D simulation, we can observe the development of failure clearly and study the failure behavior and stability of the model with different depositions of face slab and different embedded length and spacing of the reinforcements.

　　The results show that the face slab with low stiffness will occur some local failure more easily and the stability of deposition with short reinforcements can’t increase satisfactorily. But when the reinforcement is long enough, i.e., longer than a threshold length, then the influence of face slab is unapparent. By the observation of failure processes, the reinforced zone forms a whole and slips like a mass. The location of failure surface and failure mode will change with different reinforced style and reinforced purpose. Therefore, for design and analysis of reinforced structure, it must take into the account of the influence of reinforcements on the whole behavior.

        Title                                 Page
Introduction                              1
1     General                                                                                                                       1
2	Objectives of the Study                                                                      2
3	Contents in the Thesis                                                                            2

Literature Review                         3
1	History and Develop of Slope Stability                              3
2	Mechanical Properties of the 
        Reinforcement Material                    4
3	Fundamental Theories of Failure and 
        Stable Analysis                           5
4	Stable Analysis of the Reinforced 
        Slope                                     7
4.1  Failure Modes                                                                                             7
4.2  Failure Analysis of the Reinforced 
        Slope                                     8
4.3  Discussions of Analytic Methods                                            9
5	Soil-Nailing Retaining Structure                                               9
5.1  History of the Soil Nailing Structures                          9
5.2  Advantages and Restrictions of the Soil 
        Nailing Structures                       11 
5.3  Characteristics of the Soil Nailing 
        Structure                                12
5.4  Force Development of the Soil Nailing                               13  
5.4.1 Mechanical Action in the Soil Nailing  13
5.4.2 Interaction Between Soil and 
          Soil-Nailing                           13
5.5  The Development in the Past 
        Investigation                            15
5.5.1 The Past model Experiments                                                 15
5.5.2 On-Site Measurement Data                                                  29
5.6  Present Conclusions about the Soil 
        Nailing Structure                        31
5.7  Design Methods                                                                                                     33
6	The Relative Experiments of Tilting Box                          34
6.1  Tilting Box Model                                                                                   34
6.2  The Characters of Steel-Rods Element                              38
6.2.1 P. W. Rowe’s Research                                                            38
6.2.2 NCKU Steel-Rod Model                                                           41

Steel-rod Tilting Box Model and Medium 
        in Tests                                 44
1	The Purpose of Using the Tilting 
        Steel-Rod Model                          44
2	The comparisons of the Steel-Rod Tilting 
        Box Model with General Sand Box Model                                                        45
3	Introduction of the Steel-Rod Tilting 
        Box                                      46
3.1  Model Noumenon with Supportive System                                 46
3.2  Reinforcement and Wall Slab                                                      47
3.3  Photographic Equipments                                                                         49
4	Contents in the Steel-Rod Tilting Box 
        Model Experiments                        49
5	Steps of the Model Experiments                                                  50
6	Steps of Image Processing                                                                     51

The Result of Experiments and Analyze                                      52
1	The Results of the Experiments                                                   52
2     Analysis of Data                                                                                                            52
3	Analysis by Image                                                                                        55
3.1	The Developments of Failure Process                                55
3.2	Combined Discuss on Image Analysis                               59
4     Discuss on the Design Methods                                                     60
4.1	Discuss on the Failure Surface and 
        Failure Mode                             60
4.2	Recommendations for the Design of 
        Reinforced Soil Structures                                                                          61
5	Other Discussions on the Experiments                                63
5.1	The Effect of Different Lifting Angle in 
        the Experiments                          63
5.2	The Error of the Experiments                                                   63
5.3	The Effect of Lifting Speed                                                           64
5.4	The Discussion of the Inclined Condition
        of Reinforcements                        64
5.5	The Comparison Between 2-D and 3-D Model 
        Test                                     65
5.6	The Discussion of Friction at 
        Reinforcement Interface                  65
5.7  The Discussion of Similarity in 
        Reinforcement                            66

Conclusion and Recommendations                                                     67
1	Conclusions                                                                                                             67
2	Recommendations                                                                                                 68
                                    

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校外：2004-07-28公開

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