連續壁工法於卵礫石層施工穩定液控制案例介紹

A Case Study on Slurry Control for Diaphragm Wall Construction in Gravel

廖述良(Leo Liao) ； 劉國鎮(Gwo-Jenn Liu)

《地工技術》 62期 (1997/08) Pp. 35-38

https://doi.org/10.30140/SG.199708.0002

摘要

近年來地下連續壁工法，廣為國內深開挖營造工程所使用，而連續壁槽構挖掘過程中，主要賴以穩定開挖壁面之穩定液，若因地層透水性高而產生逸流，穩定液面無法維持，則可能影響施工及鄰近結構物安全。經於現地選取五個連續壁試驗單元試驗結果顯示，以於穩定液中添加重量比約4%之逸流防止材（蛭石、木屑、纖維、粒狀皂土）將可有效降低逸流流量。

關鍵字

穩定液 ； 逸流 ； 連續壁

並列摘要

In the past decades, diaphragm slurry wall has been widely used for deep excavation in Taiwan. During trench excavation, slurry is required to maintain the stability. If the trench is in the soils with high permeability such as gravel, the slurry level cannot be maintained due to high filtration rate. It could cause construction problems or result in damages on adjacent buildings. This paper presents a trial test and its results. In the trial test, different additives were used during installation of five slurry wall panels; and the results showed that the additives (wood chips, fibers, clustered bentonite) of 4% by weight could effectively reduce the filtration rate.

並列關鍵字

Slurry ； circulation loss ； diaphragm wall