| 姓名 | 鄭偉豐(Wei-feng Jen) | 電子郵件信箱 | s9111632@mail.cyut.edu.tw | |
| 畢業系所 | 營建工程系碩士班(Department and Graduate Institute of Constrction Engineering) | |||
| 畢業學位 | 碩士(Master) | 畢業時期 | 92學年第2學期 | |
| 論文名稱(中) | 南部國道沿線礫石層邊坡穩定工法之研究 | |||
| 論文名稱(英) | The Technical
Treatments on Slope Stabilization for The Gravel Formation alone Freeway in Southern Taiwan | |||
| 檔案 |
請遵守中華民國著作權法之相關規定，切勿任意重製、散佈、改作、轉貼、播送，以免觸法。 |
論文使用權限 | 校內外完全公開 | |
| 論文語文/頁數 | 中文/155 | |||
| 摘要(中) | 依據國道南部第二高速公路古坑系統交流道至梅山系統交流道現地調查所得結果，該路段主要地質為礫石。當初公路沿線礫石邊坡於設計階段時，採用了包括植生帶舖植工法及薄層噴植工法二種護坡工法，另部份邊坡高度較小之路段未予植生處理；由於此路段邊坡易受雨水侵蝕而形成侵蝕溝，並使其細粒料流失，造成邊坡植生效果不佳，所採用之護坡工法無法達到其預期之效果，本研究目的為建議適合之工法應用於現地礫石邊坡上，並探討邊坡之整體行為與穩定性。 首先，進行相關文獻之整理，配合現地調查及相關案例(台中大坑、中二高清水至龍井段及中山高竹圍至三義段)之比較，利用極限平衡法(STABL 6)及數值分析法(FLAC 2D)兩種分析軟體，針對南部國道礫石層邊坡之現況(平時、暴雨、地震)、現況影響因子(坡高、坡角、土壤摩擦角、凝聚力、地下水位)及邊坡保護工法(土釘埋設長度、傾角、水平間距、地下水位)等進行研究。 藉由分析所得之結果，於南二高南下路段(277.8Km ~ 277.9Km)礫石邊坡上進行壓入式土釘工法及置入式土釘工法，配合植生網毯工程施作，並於現地規劃設置監測儀器，提供後續監測作業及邊坡穩定成效性分析之依據，可提供予南二高礫石路段養護與附近區域內重大工程之參考。 本研究結果顯示：(1)配合礫石層之力學特性，考慮平時、暴雨及地震之影響，經STABL 6及FLAC分析結果得知，礫石邊坡之破壞面應為不規則淺層滑動或表面侵蝕滑動，且暴雨狀態(地下水位因子)影響礫石邊坡穩定最大。(2)進行土釘工法分析得知，影響邊坡最大穩定因子為土釘長度，另土釘打設傾角方面，與邊坡坡角有絕對關係，應嚴格控制打設角度。(3)就分析軟體方面，因FLAC其考慮條件較完整，能獲得較經濟的結果，並可得邊坡表面及土釘兩端之位移量，故後續現地試驗規劃與設置均採用FLAC做為分析工具。(4)本研究提出以靜壓方式將圓鋼棒(D42)壓入礫石邊坡之壓入式土釘工法(新工法)，可避免傳統土釘打設時礫石土受到過大擾動，致降低內摩擦角之缺點，另可節省傳統土釘工程灌漿之費用及降低崩孔之危險等優點。(5)各工法配合邊坡上鋪設植生網毯，進行中層噴植植生，應可有效改善邊坡表層受雨水之沖蝕等問題。 | |||
| 摘要(英) | According to the
geological formation from Ku-Kang interchange to Mei-Shan interchange of
the second national freeway, it has gravel deposits. Slope stabilization
treatment of this region including polyathylen strip method and thin
layer hydrograsser method, some small slopes even have not been treated.
A few of the treated slopes fail during heavy rainfall. The post method
of treatmenting these slopes obviously doesn’t function properly. The
purposes of this research is to suggest suitable methods for gravel
slopes, and consider slope behavior and stability. First of all, investigating and comparing the related-case such as Da-Ken landscape area of Tachung city、Ching-Shui – Lueng-Jieng section of the second freeway and Chu-Wei – San-Yi section of the Zhong-shan freeway. Secondly, the STABL 6 and FLAC software are used. The gravel slope and the factors of influence such as slope height, gradient, C, ψ, rainfall state, and earthquake…etc. are discussed, and the slope stabilization methods (soil nailing +erocomat) are proceeding in this research. As the result, the gravel slope of the second national freeway (277.8Km - 277.9Km ) uses press type soil nailing and put type soil nailing, and cooperating erocomat material. The monitor instrument planning and the set up of the in-situtest are organized by the certification of preview analysis. Research results show that: (1) To operate in coordination of gravel mechanic characteristics, the influence of the rainfall and earthquake are considered by STABL 6 and FLAC analysis, the fail surface of the slope is being shallow circular or slipping. (2)The length-nail could be the main influence that the slop will be in the stable position or not. Moreover, there is definitely an important relationship between the soil-nail’s angle and slope. (3)About the software , FLAC could obtain more economic results by using the same time as well. Therefore, this research uses FLAC analysis to the follow-up site testing plans after all. (4)The study utilizes circular steel (D42) presses into gravel slopes (new method), could avoid many disadvantages which are caused by put type soil nailing grouting expenses and also could reduce the big risk of collapse (5) To proceed middle hydrograsser method will give the slope didn’t destroy by heavy rain washout. | |||
| 關鍵字(中) |
|
關鍵字(英) |
| |
| 指導教授 |
| |||