高速道路 路線의 透水性地盤 處理工法에 關한 硏究(第1報) = A Study on the Counter-measure against the Water Permeation of the Super High Way Foundation〔1〕

다국어 초록 (Multilingual Abstract)

Very often, the water permeation of the soil is a trouble to dealing with the problems of soil engineering or foundation engineering. In case the geology of the operation, in the super high way and the other civil engineering projects, is nst good;the site of the operation needs to be moved to different place. However, when there are existing facilities or when there are no proper foundations, the site of the operation can not be changed. Therefore, the special way of engineering operation is mentioned here which has to be applied in that case. And a laboratory experiment is made, for the purpose of stopping water from permeating the foundation, by chemical reagents in the materials, which water permeating foundation contains, such as fine sand, coarse sand, and coarse-sand and gravel. According to the result of the experiment, some conclusions are presentented and arranged here as follows :
1. In permeability test of constant water level with dry sand, the amount of water permeation decreases as the time goes; and nearly the same amount of permeation is maintained after twenty four hours or so.
2. It is considered that the same amount of permeation is not maintained by the function of the air in the soil and the air in the permeating. water.
3. Soon after chemical agent is poured, the amount of permeation decreases suddenly, but as the time goes, it maintains mormal condition.
4. It is considered that the effect of chemical agent pourring happens immediately, for the results of permeating soon after and twenty hours after chemical agent pouring are the same.
5. The change of the permeation coefficients is chiefly influenced by the thickness of the first chemical agent (Na_2Sio_3). The best thickness is 10~15%. The second agent is Cacl_2.
6. The best influences of the chemical agents are as lollows: It is treat. 1-15-5(15% Nea_2Sio_3, 5% Cacl_2)in fine sand. treat. 2-10-3(10% Na_2 Sio_3, 3% Cacl_2)in coarse cand, and treat. 3-15-15 (15% Na_2Sio_3, 15% Cacl_2) in coarse-sand and gravel.