審視相關隧道工程或淨、污水與電力等維生管線洞道與能、資源探勘、掘採等技術，其設計與施工均較乏開挖掘進學理配合之實作評核，地質材料之開挖掘削機制幾乎難有較科學之設計與施工之標準流程，例如綜整掘進機種類共計超過六千多種之開挖面盤配置(日本為例)，多只依賴經驗評估設計，各項工法與機型對應各類不同岩-土質地層；多只就「可挖性」作探討，鮮能再對地盤-機械開挖互制行為作一「適確性」研析，如此之地下開挖進度及成本、品控與安全變異頗大，且隨著地質變異性增加而遽增，如雪隧之工程延宕(如四稜砂岩與破碎斷層帶或地下水脈)、維生管線洞道遇變異大之卵礫石層；都會盆地市中心飽和向外拓展常由土壤變岩石等工程。
本研究嘗試將設計及施工問題作通盤考量，可以符統包制度之要旨。首先由設計課題切入探討於廣義式掘進推力之評估。其中前方與周身阻抗；探討傳統未考慮之刀頭貫切力；及周身阻抗則探討地下水的浮力影響及掘進坡度造成之阻抗，並經異況警戒之風險管理概念，代入不同的情況；模擬分析推力之上/下限值。而施工課題，則利用量綱分析研探可提出接觸力學行為的推進力系及其正規化影響因子，建立廣義式地下機械掘削機制及其適挖性指標作為實務工程之應用，且利用資料探勘尋找適挖指標用於預測地質之可能性。
實務案例應用上，由現況調查之比對，則以核一、汐止∼松湖345kV地下電纜線路工程及松湖~大安345kV 電纜線路潛盾洞道工程，兩案例進行外業調查，以驗證本研究之適確性。研究發現於設計部分：(1) 案例一之低塑性黏土段，潛盾機推力掘進至0k+398時，已趨近其總推力下限值，即近域場產生主動破壞；而於遠域場可能有地表沈陷之虞、(2) 案例一之砂頁岩互層段，潛盾機推力最大值於1k+342處發生，工地現場此時也因外緣切刃齒磨耗得差不多，挖出來的孔徑與潛盾機盾殼外徑一樣，造成機身遭地層束縛住；施工部分：綜整前人文獻及本研究分析案例，發現不論工種相同與否，只要近似地質材料會群聚在附近，延性材料(土壤)推力指標落在10^1~10^2之間，脆性材料(岩盤)則落在10^0~10^-2之間，延脆複合材料(卵礫石)落在10^-3~10^-1之間。本研究使用WEKA分析得知，利用前後環之差值可以預測約2倍隧道直徑前方地質，兩案例皆有約80%高準確率。

To improve mass transit construction and the penetration of sewage reticulation, Taiwan's underground excavation works play a critical role. Mechanical excavation projects are increasing with more infrastructure development. However, most of researches emphasis on geotechnical safety or stability without the assessment of efficiency and suitability of the excavation methods. Some of the mechanical excavation systems used are based on studies done in Europe, Japan and elsewhere by foreign manufacturers hence cannot be relied on to give the standards for design and construction in Taiwan as Japan and European experiences are not necessarily appropriate to conditions in Taiwan. Thus to promote the relevant tunneling technology in Taiwan, there is need for more understandings on this topic. This study plan aims at the tunneling excavation with different dig scales. The proposal seeks to establish a novel, general model that considers the vary machines (tunnel boring machine, shield tunnel and pipe jacking ), types (earth pressure balance, slurry pressure balance, thick-mud) and geological cases (soil, gravel and rock) in one unified model to analyze. The straight/curved thrust and torque will be calculated for a blunt/sharp, wedge/cone cutter from global cutting to local dragging/indentation of a tunneling machine respectively.
This study aims at investigation and application for both design and construction such as turnkey project. For “design period”: Besides the traditional equations, the study examined more key factors: single cutter to doubled-cutters, the axial gradient of tunnel, floating power and different working condition (active or passive earth pressure, machine or pipe touch tight or densification by geological gable). For “construction period”: By using dimensional analysis, the proposed model generalizes geological characteristics corresponding to two types of cutting forces (thrust and torque) to evaluate their excavation progress with penetration rate. Furthermore, the normalizedSuitable Indices: can be used not only to estimate the functionality and efficiency of cutting machine adopted for tunnel project, but also to offer a warning information for inadequate cutting strategy. To obtain feasibility of normalizedSuitable Indices: applied to geological prediction by using data mining.
This research obtained the following results with two study cases in Taipei:
Design parts:
(1) Low plasticity clay from first case studies, thrust has been approaching the lower bound at 0k + 398 m, namely in near field generating active earth pressure failure; and settlement may be happened in the far field.
(2) Sandstone and shale interbed from first case studies, thrust maximum occurs at 1k + 342 m, the outer cutters due to wear, excavation the aperture and shield machine shell the outer diameter are almost the same, resulting in shield machine were shackled in the underground.
Construction parts: Combined previous literatures and this research, as long as the approximate geological materials will cluster is closer either: ductile (soil) thrust index between 10^1 to 10^2, brittle materials (rock-like) between 10^0 and 10^-2, composite material (gravel) between 10^-3 and 10^-1.
Data mining: WEKA analysis showed that the difference rings parameters between previous and now value can be predicted geology about the front of 2 times shield machine diameter, two case studies above 80% high accuracy.

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