砂礫層對擠壓灌漿之反應

Response of Sandy Gravel Layers to Compaction Grouting

黃南輝(R. Hwang) ； 高祥生(H. S. Kao) ； 郭國振(K. J. Kuo) ； 張兆麟(J. L. Chang)

《地工技術》 47期 (1994/09) Pp. 23-33

https://doi.org/10.30140/SG.199409.0002

摘要

擠壓灌漿（Compaction Grouting）之目的在：（1）擠實土壤以減少後續沉陷及（2）借局部地表隆起將已傾斜的建築物扶正。本文根據台北市捷運系統CC275標之擠壓灌漿試灌所得資料分析施作方式、地表荷重及漿材之坍度對擠壓灌漿成效之影響，並分析破壞模式及機制。結果顯示（1）在砂礫層中施作擠壓灌漿的確可以產生永久性地表隆起，（2）高坍度漿材不會造成脈狀破壞，主要的破壞模式是錐狀破壞，（3）小區域荷重不會影響錐狀破壞之時機，但會減少荷重區及其鄰近地區之隆起。

關鍵字

擠壓灌漿 ； 台北捷運 ； 砂礫層 ； 破壞模式

並列摘要

The purposes of compaction grouting include: (a) to densify soils, hence, to reduce subsequent settlements and (b) to lift up structures. This paper, based on the results of a trial carried out for Contract CC275 of the Taipei Mass Rapid Transit Systems, discusses the effects of procedure, surcharge and the slump of grout on the effectiveness of compaction grouting. It has been found that: (a) permanent heave can be achieved in sandy gravels, (b) grout with large slump will not result in hydraulic fracturing, and (c) surcharge in a small area will not affect the pattern of cone failure, however, ground heave will be reduced locally.

並列關鍵字

compaction grouting ； taipei MRT ； sandy gravel ； failure mode