Toward a safe and secure geo-environment reinforced by soil stabilization using lime admixture.

通过使用石灰混合物稳定土壤，打造安全可靠的地质环境。

基本信息

批准号：
22658072
负责人：
MORII Toshihiro
金额：
$ 1.71万
依托单位：
Niigata University
依托单位国家：
日本
项目类别：
Grant-in-Aid for Challenging Exploratory Research
财政年份：
2010
资助国家：
日本
起止时间：
2010 至 2011
项目状态：
已结题

来源：
https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-22658072/
关键词：
石灰系固化材安定処理土地震地盤工学環境技術

项目摘要

Rural sewerage pipelines were severely damaged by liquefaction of backfill soil during the Niigataken Chuetsu-oki Earthquake in 2007. But a large length of the sewerage pipelines which had been damaged by the liquefaction during the Niigataken Chetsu Earthequake in 2004 and been repaired by backfilling the sandy soil stabilized by lime admixture remained unhurt because of no liquefaction in the backfill. In the paper the damages of the rural sewerage pipelines caused by the Niigataken Chuetsu-oki Earthquake in 2007 are investigated and compared with those in 2004 to show an effective liquefaction resistance of the backfill soil stabilized by the lime admixture. Then, in order to evaluate quantitatively the liquefaction resistance of the sandy soil stabilized by the lime admixture, a series of unconfined compression test is carried out. Soil specimen 5cm in diameter and 10cm in height are compacted and cured in a humid container during 56 days. It is shown that the unconfined compression strength of the stabilized soil increases with curing period and, in the case of addition of 5% quantity in dry mass of lime admixture, reaches successfully 100 to 200 kPa which is the unconfined compression strength required for the backfill soil. Some difficult may which be encountered in excavating the stabilized soil is pointed out. It is also shown that a non-compaction period before compaction as well as an immersion of lime-stabilized soil into water affects the increase of unconfined compression strength of the stabilized soil with time.

农村的下水道管道在2007年的niigataken chuetsu-oki地震期间因回填土壤的液化而严重损坏。但是，在2004年，在niigataken chetsu erachequake期间，液化损坏的下水道管道很大，在2004年被液化损坏，并通过回填沙子进行了修复。由于回填中没有液化，因此被石灰混合物稳定的土壤仍然没有受伤。在本文中，研究了2007年由niigataken chuetsu-oki地震引起的农村污水管道的损害，并与2004年的损害进行了比较，以表明通过石灰混合物稳定的回填土壤具有有效的液化抗性。然后，为了定量评估通过石灰混合物稳定的沙质土壤的液化耐药性，进行了一系列未经限制的压缩试验。土壤标本的直径为5厘米，高度为10厘米，在56天内将其固化在潮湿的容器中。结果表明，稳定土壤的不受限制压缩强度随固化周期的增加而增加，并且在加入干燥的石灰混合物中添加5％量的情况下，成功达到100至200 kPa，这是反击所需的无限制压缩强度土壤。指出了在挖掘稳定土壤时遇到的一些困难。还表明，压实之前的非繁殖期以及将石灰稳定的土壤浸入水中会影响稳定土壤的无限制压缩强度的提高。