用砂砾(卵)石换填粘性土防治冻胀

一、问题的提出 半个世纪来,国内外在寒冷地区从事各种工程建筑时,均普遍采用纯净的砂砾(卵)石料,或粗、中砂换填冻胀性土层,来消除或减轻地基土的冻胀量(或冻胀力),从而达到防治建筑物冻胀变形,并且常常得到拟想的结果。但也经常适得其反。说明至今对换填的材料性质(即

ON ANTIHEAVE MEASURE BY REPLACING CLAYEY SOIL WITH GRAVELS

Our study shows that the antihcave measure adopted in various countries by the replacement of clayey soil with gravels, c.i. to define the content of fine grain soil and the depth of exchanges, has proved to be essential. It is only under the condition that the bottom of gravel layer has the capacity to drain off the extra volume of water due to the expension of pore water frozen along with the soil will such a measure succeed.