地下結構物進行開挖時,常會造成地表土壤之沉陷以及建築物之傾斜,然而一般基礎的補強或扶正工程,多半採用補償性灌漿加以處理,其依據漿體性質的不同,可概括區分為二種:擠壓灌漿工法及脈狀灌漿工法。此二灌漿工法在工程應用上行之有年,然其扶正機制仍不明確,其中尤以劈裂灌漿工法為甚。 有鑑於此,本研究除將透過國內外各專家學者之研究,比較此二種工法在灌漿行為、機制及最終成效的異同外,並針對漿體於土層中之長期效用,以及土壤的壓密作用與漿體相互間之關係,進行有系統之探討。其次,以台北盆地內一黏土地層中,某扶正灌漿工程之施工實例加以說明,並依其灌漿成效及監測結果分析討論,來進行灌漿扶正工程的力學機制研究,以驗證灌漿方式對於傾斜建物扶正之可行性。 本研究將工程案例中監測灌漿成果,進行各項成效之分析,探討影響灌漿效率因素,再依據其地層土壤性質,進行補償性灌漿工法之選擇、灌漿孔之配置及灌漿機制之掌控,以提升灌漿效率,同時在確保建物安全前提下完成扶正工程。
Compensation grouting control ground settlement and tilted building caused by underground construction. According to the differences of grout properties, there are two different kinds of grouting programs, which are Compaction Grouting and Fracture Grouting. Both of them have been adopted for decades, although the mechanisms are still not quite established. In view of this, this research will first compile experts and scholars researches, then we are going to discuss what we know so far about the mechanism of the two grouting programs, and to the long-term effect in the soil layer. Secondly, one clay of the stratum, it is a case of restoring a tilted building in Taipei, from grouting effect and monitor result, and an analysis of mechanics mechanism by restoring tilted building. In this research, according to the monitor result of case, then we are going to discuss effect grouting efficiency factor, and depend on the properties of the differential soil layers to process the choices of Compensation Grouting, disposition of grouting hole and to control the grouting mechanism. It is for elevate the efficiency of grouting, at the same time can be sure the building is kept safe to complete Restoring Tilted Building.