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題名 | 雲林土庫地區高鐵與公路路堤交會處之地層下陷特性初探=Preliminary Study on the Ground Subsidence at the Intersection of Expressway No.78 and Taiwan High Speed Rail at Tuku Township, Yunlin County, Taiwan |
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作者 | 林宏明; 李德河; 吳建宏; 劉進金; | 書刊名 | 地工技術 |
卷期 | 139 2014.03[民103.03] |
頁次 | 頁27-36 |
專輯 | 地盤沉陷與淹水 |
分類號 | 443.67 |
關鍵詞 | 地層下陷; 壓密; 高速鐵路; 公路路堤; Ground subsidence; Soil consolidation; Taiwan high speed rail; Highway embankment; |
語文 | 中文(Chinese) |
中文摘要 | 本文以雲林土庫地區高鐵與台78線快速道路交會處之地層鑽探資料以及公路路堤重量、高鐵墩柱的承受載重為基礎,初步探討各項荷重對交會處附近地表下300m以內各土層中所引起的應力增量以及所產生的土層壓縮、壓密情形。根據鑽探資料可知,調查區在地表下300m以內是由18個土層所構成,且呈現出砂土、黏土層互層之構造。假設公路路堤是由地表向下依垂直:水平=2:1的比例傳達其重量,而高鐵墩柱載重則由群樁基礎長度約2/3處(約地表下40m)向下傳遞其應力,使各土層產生應力增量並產生壓密壓縮的現象。由分析結果可見,高鐵墩柱的載重所引起的土層壓密壓縮現象在地表下219.5m(第13層CL7)處已經微乎其微,但是公路路堤重量在各土層中所引發的應力增量於第18層(SM9)中尚有0.67t/m2, 為其在地表的均佈荷重4.224t/m2的15.86%,顯示在探討此區之地層下陷特性時,其所要考量的地層影響深度應大於300m。此外,本文中亦由可提供大上載應力的深層土壤壓密試驗儀的試驗結果看出,要瞭解深度大於300m以下的土層之壓密特性時,深層土壤壓密試驗儀是必要的。 |
英文摘要 | This study investigates the compressibility and consolidations of the soils within the depth up to 300 m at the intersection of Expressway No.78 and Taiwan High Speed Rail(THSR) at Tuku Township, Yunlin County, Taiwan. The stress increments caused by the weights of highway embankment and the loadings coming from the pier of the THSR are the mail reason to cause local ground settlement. Borehole data show that local soils are consisted of 18-interlayer of sands and clay. The highway embankment loads to the ground surface; while, the loading of the THSR pier are conducted to the ground at the depth of 40 m, which is roughly the 2/3 of the pile length, through group piles. The increase of stresses in theground results in ground settlements. The analysis results show that insignificant soil consolidations are found at the depth of 219.5 m (13th layer of CL7) caused by the THSR pier. But, the stress increment at the 18th layer of SM9 remains 0.65 t/m2, which is roughly 15.86% of the stress of 4.224 t/m2 at the ground surface. It is essential to investigate the impact of soil consolidations at the depth more than 300 m. In addition, experimental results of soil consolidations with very large loadings show the requirement of investigating the soil consolidations deeper than 300 m using soil consolidation facility with very large capacity. |
本系統之摘要資訊系依該期刊論文摘要之資訊為主。