工程施工管理與關鍵課題研究-以大嵙崁清淤輸送系統工程(4K+680~6K+860)為例;Construction Management and Key Issues in Engineering Projects: A Case Study of the Dakekan Desilting Pipeline System Project (4K+680 to 6K+860)

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Title:	工程施工管理與關鍵課題研究-以大嵙崁清淤輸送系統工程(4K+680~6K+860)為例;Construction Management and Key Issues in Engineering Projects: A Case Study of the Dakekan Desilting Pipeline System Project (4K+680 to 6K+860)
Authors:	李品卉;LI, PIN-HUI
Contributors:	土木工程學系
Keywords:	工程施工管理;關鍵課題;石門水庫淤泥再生;大嵙崁清淤輸送系統
Date:	2025-07-07
Issue Date:	2025-10-17 11:00:34 (UTC+8)
Publisher:	國立中央大學
Abstract:	本研究係探討石門水庫下游大漢溪左岸大嵙崁清淤輸送系統工程 (4K+680~6K+860)之工程施工管理及關鍵課題。鑑於石門水庫營運多年累積大量淤積，且近年極端降雨加劇，亟需提升清淤效率及排洪能力。原有清淤運輸路線繞行市區省道，衍生交通壅塞、效率低落及環境衝擊等問題。本清淤道路系統旨在興建專用清淤輸送道路，以改善上述困境，並串聯防汛及自行車道，帶動區域發展。研究採用文獻回顧、案例分析及綜合歸納法，聚焦於該工程的道路二標。核心課題包括： 1.清淤輸送道路路面設計：該道路定位為「服務道路」，設計速率為40 km/hr，標準斷面包含清淤車道及人行兼自行車共用道。路面結構採柔性設計，依AASHTO法計算厚度，並評估使用再生粒料。 2.淤泥再生利用：工程需大量土方，規劃利用石門水庫淤泥及三坑舊河道疏濬土方作為回填料，以達淤泥去化及循環經濟目標。試驗證實淤泥拌合土適用於路堤邊坡填築，且邊坡穩定分析結果符合規範安全要求。 3.生態調查及檢核：進行工程區域陸域及水域生態調查。發現保育類動物(如鴛鴦、大冠鷲、鳳頭蒼鷹)及敏感區域。生態檢核遵循「迴避、縮小、減輕及補償」原則，提出多項生態友善措施，包含原生植栽、大樹保護/移植、低干擾施工、動物友善設施 (速限、通道、反光板)、水域保護等。最後針對工程成效評估顯示，本案例道路二標工程品質督導查核為甲等 (82分)。而在節能減碳效益上本清淤輸送系統預估每年約可減少達56萬公斤之碳排量。本工程是全台首創的清淤專用輸送道路，能顯著提升清淤效率，紓解交通，強化防洪安全，並整合水岸自行車道，促進觀光休閒發展，落實水庫淤泥再利用與永續工程願景。建議未來評估設置就近淤泥處理廠及妥善處理用地取得課題。 ;This study investigates the construction management practices and critical engineering issues associated with the Dakekan Dredging Conveyance System Project (Sta. 4K+680 to 6K+860), located on the left bank of the Dahan River downstream of the Shimen Reservoir. Due to long-term reservoir operation, significant sediment accumulation has occurred, a situation exacerbated by the increasing frequency and intensity of extreme rainfall events in recent years. Consequently, there is an urgent need to enhance sediment removal efficiency and flood discharge capacity. The existing dredged material transport route, which passes through urban provincial highways, has caused traffic congestion, operational inefficiencies, and adverse environmental impacts. The proposed project aims to construct a dedicated dredging transport corridor to alleviate these issues, while also integrating flood mitigation infrastructure and a riverside bikeway to promote regional development. The study adopts a methodology combining literature review, case study analysis, and systematic synthesis, with a focus on the second roadwork section of the project. The key engineering topics addressed include: 1.Pavement Design for the Dredging Transport Road: The road is classified as a service road with a design speed of 40 km/h. The standard cross-section includes dedicated dredging truck lanes and a shared pedestrian-bicycle path. A flexible pavement structure was adopted, with design thickness calculated based on the AASHTO method. The feasibility of incorporating recycled aggregates was also evaluated. 2.Reutilization of Dredged Sediments: Given the large earthwork demand, the project planned for the reuse of sediments from the Shimen Reservoir and the San-keng abandoned river channel as backfill material. Laboratory tests confirmed the suitability of blended dredged sediment for embankment slope fill, and slope stability analyses demonstrated compliance with relevant safety standards. 3.Ecological Survey and Assessment: Terrestrial and aquatic ecological surveys were conducted within the project area, identifying protected species such as the Mandarin duck (Aix galericulata), Crested serpent eagle (Spilornis cheela), and Crested goshawk (Accipiter trivirgatus), as well as ecologically sensitive zones. Ecological impact assessments adhered to the principles of avoidance, minimization, mitigation, and compensation. Multiple eco-friendly engineering measures were proposed, including native vegetation restoration, tree protection and transplantation, low-disturbance construction methods, wildlife-friendly facilities (e.g., speed limits, underpasses, reflective panels), and aquatic habitat conservation. The post-construction evaluation of this second roadwork section received a Class A quality rating (82/100) in supervisory audits. The energy-saving and carbon-reduction benefits were estimated to reduce annual carbon emissions by approximately 560,000 kilograms. This project represents Taiwan’s first dedicated dredging transport corridor, significantly enhancing sediment removal efficiency, easing traffic congestion, strengthening flood control, and integrating riverside bikeway networks to foster tourism and recreational development. It embodies the principles of sustainable engineering and circular economy through sediment reuse. Future recommendations include evaluating the feasibility of establishing nearby sediment treatment facilities and addressing challenges related to land acquisition.
Appears in Collections:	[Graduate Institute of Civil Engineering] Electronic Thesis & Dissertation

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