Please use this identifier to cite or link to this item: http://hdl.handle.net/11455/15170
DC FieldValueLanguage
dc.contributor.advisor壽克堅zh_TW
dc.contributor.advisorShou Ker-Janen_US
dc.contributor.author林棕元zh_TW
dc.contributor.authorYuan, Lin Tsungen_US
dc.date1999zh_TW
dc.date.accessioned2014-06-06T06:53:37Z-
dc.date.available2014-06-06T06:53:37Z-
dc.identifier.urihttp://hdl.handle.net/11455/15170-
dc.description.abstract新建或更新維生管線為都市發展必須面對的工作,傳統之明挖工法有施工簡易、造價低廉之優點,但其對環境及交通之衝擊大,或遭遇地表無法開挖的障礙時也不能採用,因此有非明挖之工法之發展與應用。台中地區之地層,除地表4m以內的表土層外,主要為渾厚之卵礫石層;且因卵礫石屬石英砂岩,質地相當堅硬,一般仍多以人工方式代替機械進行地下開挖施工。近年來台中都會區非明挖之管推進工法漸漸被採用,卵礫石層管推進工程之分析研究為急需探討之課題。本研究對台中地區於民國86至 88年間的管推進工程進行現地案例調查,共蒐集調查11個管推進工程進行案例調查,針對相關資料進行分析探討,並利用有限元素程式ABAQUS進行三維數值分析,模擬卵礫石層地下開挖之行為。 本研究參考前人研究之文獻資料,並根據現場試驗所得部分之參數,利用ABAQUS有限元素法程式進行管推進工程之三維模擬。考慮卵礫石土之應力-應變關係為彈性完全塑性( elasto perfectly plastic ),塑性部分主要採用Mohr-Coulomb塑性降伏準則模擬。分析管推進工程地下開挖過程卵礫石層受力及變形行為,所得之結果與現場觀測值比較,並探討不同內摩擦角f、管頂覆土深度(d)、靜止土壓力係數Ko、輪進長度(S)、管直徑(D)及前進面效應對開挖穩定之影響。 本研究主要針對台中北屯地區新后庄路某管線穿越中清路推進工程進行案例分析研究(管頂覆土深度為3.7m,管直徑為2.6m,推進總長為32m)。分析結果顯示僅可得到定性之合理結果,且此典型案例應屬極淺層隧道開挖,其特殊之變形行為因文獻不足,仍待進一步之比較探討。參數影響研究發現管頂覆土深度(d)越深,最大沉陷量越大,沉陷槽範圍也隨之變大,且地表管外圍隆起現象越不明顯;靜止土壓力係數Ko值越大,最大沉陷量越小;內摩擦角f越大,最大地表沉陷量越小;輪進長度(S)越長,最大沉陷量越大;管直徑(D)越大,最大沉陷量也越大。zh_TW
dc.description.abstractConstructing or renewing service pipelines is one of the major construction works during development of an urban area. Traditional trench excavating method has advantages, such as easy working and low cost, etc., however, it has large impact on not only the environment but also the traffic. Also, it does not suitable for the conditions with permanent surface facilities. Therefore, trenchless construction methods were developed and applied to avoid those difficulties. The surface formations of Taichung area, besides a 4 meter thick soil, consists of a gravel formations thicker than 50 meters. As the quartz-sandstone gravel is very hard and difficult to break, the most common excavation methods are non-mechanical and semi-mechanical methods. In recent years, due to the rapid development of the city, there are more and more trenchless pipejacking constructions. The objective of the this study is focused on the pipejacking construction in gravel formations. The study investigated and analyzed 11 pipejacking constructions in Taichung area during 1997~1999. Besides, the finite element software ABAQUS was used to simulate the behavior of underground excavation in the gravel formations. In the three-dimensional pipejacking simulation, elasto perfectly plastic stress-strain relationship as well as the Mohr-Coulomb plasticity yielding model was used. We analyzed the behavior of the gravel formations in the process of pipejacking construction and compare the numerical results with the in-situ subsidence surveying results. A systematic analysis was also performed to investigate the influence of friction angle(f), overburden depth(d), earth pressure coefficient at rest(Ko), unsupported span(S), and pipe diameter(D) . A pipejacking construction at the crossroad of the Sinhochung Road and the Chungching Road (overburden depth=3.7m, pipe diameter =2.6m, excavated length=32m) was chosen for the case study. Analysis results only shows qualitatively reasonable behavior, and as the typical case is in the extreme shallow tunnel category and lack of references, the special deformation behavior needs more advanced study. From the parameter study, it shows that the largest settlement increases as the overburden depth(d) increases. In addition, the surface heaving phenomenon becomes less significant as the overburden depth increases. When the earth pressure coefficient at rest(Ko) or friction angle(f) increases, the largest settlement becomes smaller. The largest settlement becomes larger as the unsupported span(S) or pipe diameter(D) increases .en_US
dc.description.tableofcontents中文摘要 Ⅰ 英文摘要 III 目錄 V 表目錄 VIII 圖目錄 IX 照片目錄 XII 第一章 緒論 1 1.1前言 1 1.2研究動機與目的 1 1.3研究方法與內容 3 第二章 文獻回顧 5 2.1卵礫石之工程特性 5 2.1.1一般材料特性 5 2.1.2材料參數 6 2.2隧道開挖之數值分析 8 2. 3卵礫石隧道工程與管推進工程10 第三章 數值分析模型之建立 12 3.1現地應力狀態 12 3.2塑性降伏準則 13 3.3 地下開挖施工之模擬 15 3.4靜態平衡 17 3.5牛頓-瑞福生收斂法 18 3.6元素之採用 19 3.6.1三維固體元素 19 3.6.2管元素 20 第四章 案例調查與地表沉陷觀測21 4.1現地管推進工程之案例調查21 4.1.1調查目的與方法 22 4. 1.2案例調查成果 23 4.1.3討論與建議 26 4.2地表沉陷觀測 29 4.2.1觀測目的與方法 29 4.2.2觀測成果與討論 30 第五章 數值分析研究 33 5.1數值分析網格之建立 33 5.1.1數值模型之邊界 33 5.1.2網格密度之取決 34 5. 1.3元素之選用 35 5.2材料參數之選定 35 5.2.1彈性模數與柏森比 36 5.2.2剪力強度與塑性降伏準則 37 5. 2.3靜止土壓力係數與現地密度37 5.3案例分析 38 5. 3.1基本假設 38 5.3.2階段開挖與超挖之考慮 39 5.3.3案例分析結果 40 5.4參數影響分析 43 5. 4.1管頂覆土深度(d)之影響 43 5.4.2 靜止土壓力係數K0之影響 43 5.4.3 內摩擦角f之影響 44 5.4.4 輪進長度(S)之影響 44 5.4.5 管直徑(D)之影響 45 5.4結果與討論 45 第六章 結論與建議 48 6.1結論 48 6.2建議 50 參考文獻 53zh_TW
dc.language.isoen_USzh_TW
dc.publisher土木工程學系zh_TW
dc.subjectgravel formationsen_US
dc.subject卵礫石層zh_TW
dc.subjectpipejackingen_US
dc.subjectunderground excavationen_US
dc.subjectfinite element methoden_US
dc.subject管推進工程zh_TW
dc.subject地下開挖zh_TW
dc.subject有限元素法zh_TW
dc.title台中地區卵礫石層管推進工程之研究zh_TW
dc.titleA Study of the Pipejacking Construction in the Gravel Formations in Taichung Areaen_US
dc.typeThesis and Dissertationzh_TW
item.languageiso639-1en_US-
item.openairetypeThesis and Dissertation-
item.cerifentitytypePublications-
item.grantfulltextnone-
item.fulltextno fulltext-
item.openairecristypehttp://purl.org/coar/resource_type/c_18cf-
Appears in Collections:土木工程學系所
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