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軟弱地層地質改良對深開挖工程之影響工程案例探討

Cases Study of Deep Excavation in Soft Ground with Jet Grout

摘要


為瞭解捷運系統淡水線“天母”段軟弱粉土質粘土層之深開挖工程特性,本文特別針對該路段深開挖工程中利用高壓噴射灌漿作為地質改良之案例進行相關資料收集,並將各案例地質狀況適度整理簡化,再將案例工程行為之監測結果予以統計歸納,最後針對深開挖工程之擋土壁變形量、鄰房傾斜量與軸力等提出報告,並利用各項監測結果推估印證粘土不排水剪力強度Su與地盤反力係數Ks。

並列摘要


To understand the characteristic of deep excavation in soft ground, deep excavation data in ”Tien-Mou” area along MRT Tam-Shui Line were collected. Soil improvement with jet grout is used in all cases. The soil profile, parameters and monitoring data of all cases are carefully evaluated. The relationship between diaphragm wall deflection and jet grout ratio is discussed. The wall deflections after grouting and after excavation are studied, respectively. The axial force of struts are summarized and presented as enveloped earth pressure diagram for design reference. Finally, undrained shear strength and modulus of sub-grade reaction of clay are evaluated by back-analysis.

被引用紀錄


何政道(2013)。軟弱黏土層潛變引致之連續壁變形〔博士論文,國立臺北科技大學〕。華藝線上圖書館。https://doi.org/10.6841/NTUT.2013.00631
許文和(2013)。連續壁單元分割施工案例檢討〔碩士論文,國立臺北科技大學〕。華藝線上圖書館。https://doi.org/10.6841/NTUT.2013.00387
黃幸如(2008)。軟弱土層開挖輔助工法與 建物保護影響研究〔碩士論文,中原大學〕。華藝線上圖書館。https://doi.org/10.6840/cycu200800437
廖小菁(2007)。未固結噴射樁複合地盤之穩定性數值分析〔碩士論文,國立中央大學〕。華藝線上圖書館。https://www.airitilibrary.com/Article/Detail?DocID=U0031-0207200917345364
鍾佳靜(2011)。高壓噴射灌漿樁體固結前鄰近地盤之變形特性〔碩士論文,國立中央大學〕。華藝線上圖書館。https://www.airitilibrary.com/Article/Detail?DocID=U0031-1903201314424827

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