恒久性灌漿材料和其灌漿砂土之動態行為

A Permanent Grout and the Dynamic Behavior of Its Grouted Sand

米倉亮三(Ryozo Yonekura) ； 廖洪鈞(H. J. Liao) ； 林英堂(Y. T. Lin)

《地工技術》 93期 (2002/10) Pp. 5-12

https://doi.org/10.30140/SG.200210.0001

摘要

為克服水泥系列灌漿材料難以滲入砂質土壤孔隙，以及水玻璃系灌漿材料耐久性不佳的問題，目前日本已有兼具水泥系材料的恒久性和溶液型材料的高滲透性之恒久性灌漿材料被開發出來。由於土壤灌漿是最適合用來提升既有建築物基礎下方土壤抗液化能力的方法，因此本文將針對此種恒久性灌漿材料和其灌漿砂土之抗液化能力加以探討，內容包括灌漿砂土之恆久性、長期強度和透水性變化、以及在軸向反覆加載下之動態行為。整體而言，雖然恒久性灌漿材料之膠體強度不高，但是經恒久性灌漿材料灌漿後之砂土，卻能具備長期抵抗地震引致之液化問題所需的穩定性和動態行為反應。

關鍵字

恒久性灌漿材料 ； 灌漿砂土 ； 抗液化能力

並列摘要

To deal with the penetrability problem of cement grout in sandy soil and the durability problem of sodium silicate grout, a new permanent type grout has been developed in Japan during the past years. It has the durability of cement grout and the penetrability of solution grout. So this new permanent type grout can be used to improve the liquefaction resistance of in-situ sandy soil under existing buildings. This paper will present some of the strength and permeability properties of this new grout and its grouted sand. They include the chemical and physical stability of grout and the long-term permeability of grouted sand. The dynamic response of the grouted sand under triaxial cyclic test was studied as well. The test results have shown that this grout can provide the strength needed to increase the liquefaction resistance of sandy soil underlying the existing buildings.

並列關鍵字

permanent grout ； grouted sand ； liquefaction resistance