This paper is based on a newly developed recycling technics as to stabilizing excavated soils by means of uniform distribution of cementation material. A technics is called "Liquefied Stabilized Soil Method" and characterized as not only recycling excavated soils to back-filling material but also filling narrow spaces where compaction is difficult . This paper presents one of several applications by the developed method; filling a cavity under pavement of urban road. This application is thought to be possible of decreasing time and cost comparing to a conventional method. Thus, two kinds of field performance tests were conducted in order to verify capability and applicability of the method and acquire necessary field data for future maintenance works. The first field performance test used an on-site plant and a stabilized soil of low strength and relatively high flow condition while the second test used a remote plant and stabilized soils of high strength and low flow condition. The tests were evaluated in terms of adequate mix proportion, working system, working time, filling outcome, occupation of road, result of quality control test, and so on. Through two sequential field performance tests, it is confirmed that the method possesses good capability of filling cavities under the pavement and make it possible to decrease time and cost. (A)
Abstract