• Proceedings of the Korean Society of Disaster Information Conference
• /
• 2016.11a
• /
• pp.319-321
• /
• 2016

본 논문에서는 지반함몰이 발생한 현장에 긴급복구를 위한 팽창기능제의 개발에 대한 내용이다. 현재 유동화토에 대한 기준이 없어 공동에 채워지는 채움재와 비슷한 압축강도인 0.3MPa을 기준으로 하여 흙의 일축압축시험 방법을 이용하여 실험을 진행하였다. 팽창기능제의 최적배합 실험과 팽창률에 따른 압축강도를 측정하여 뒤채움재로써의 기능 특성을 평가하였다. 실험결과, 팽창기능제 A의 경우 팽창률 750%이하에서 팽창기능제 B의 경우는 모든 실험체에서 목표 강도를 만족하였다.

• Journal of the Korean GEO-environmental Society
• /
• v.20 no.5
• /
• pp.23-29
• /
• 2019

In general, pipe laying works are performed by constructing underground facilities such as pipes and then refilling the rest of the area with sand or soil. However, there are many problems in the compaction process such as difficulties in tampering around the underground facility and low compaction efficiency. Such problems cause deformation and damage to the underground pipes during refilling work and ultimately cause road sinks. Construction methods using CLSM are one of the typical methods to solve these issues, and recently, studies on CLSM using coal ash, which has similar engineering properties as sand, have been actively performed to protect environment and recycle resources. While many studies have been conducted to recycle fly ash in many ways, the demand for recycling bottom ash is increasing as most of the bottom ash is not recycled and reclaimed at ash disposal sites. Therefore, in order to find bottom ash applications using eco-friendly soil binders that are environmentally beneficial and conform with CLSM standards, this study investigated flow characteristics and strength change characteristics of eco-friendly soil binders, weathered granite soil, a typical site-generated soil, bottom ash, and fly ash mixed soil and evaluated the soil pollution to present CLSM application methods using bottom ash.

• Proceedings of the Korean Geotechical Society Conference
• /
• 2008.10a
• /
• pp.1063-1068
• /
• 2008

When construction of high pressure jet-grouting is to be performed, it has been reported that applied cement slurry which hasn't got dried out can cause severe environmental pollution, and can flow into near streams and fish farms. Several laboratory tests were performed in this study in order to verify safety of paste-like grouting material that was developed newly to be applied to void in the ground. According to experimental test results, it is proved to be so safe that application of the newly developed flowable grouting material can prevent the materials from spilling into surrounding areas and is not harmful to fishes.