潛盾施工引致孔隙水壓變化之量測與分析

Measurements and Analysis of the Pore Pressure Changes Induced by Shield Tunnelling

陳堯中(Yao-Chung Chen) ； 賴建宏(Jen-Hong Lai) ； 黃南輝(R. N. Hwang) ； 林國楨(Gwo-Jen Lin)

《地工技術》 60期 (1997/04) Pp. 97-106

https://doi.org/10.30140/SG.199704.0007

摘要

潛盾施工所引致之地盤沈陷問題為都市土木中隧道工程之重要課題，而由於潛盾機推進隆起、開挖解壓所衍生之地盤漏失及孔隙水壓變化正是造成地盤沈陷之主因。本研究在潛盾機通過電子式水壓計之監測斷面前後實施密集記讀，以瞭解潛盾施工引致孔隙水壓之變化情形。文中亦建立模擬潛盾施工之數值分析架構，利用現地監測資料驗證此分析架構之適用性，以探討推力與超額孔隙水壓增量及壓密沈陷間之關係。

關鍵字

隧道:潛盾工法 ； 孔隙水壓 ； 數值分析

並列摘要

Ground settlement induced by shield tunnelling is an important issue in the tunnel construction in urban area. The ground loss and pore pressure change induced by the advance of shield machine and the unloading of excavation are the major causes for the ground settlement. To understand the mechanism of pore pressure evolution intense measurements of the pore pressure transducers are taken before and after shield machine passing through the monitoring section. An analytical model is established and verified by comparisons with the field data. Numerical analysis is performed to investigate the relationship between thrusts, excess pore pressure increments, and consolidation settlements.

並列關鍵字

tunnel ； shield tunneling ； pore pressure ； numerical analysis