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采用砂砾石作垫层,以替换冻胀性基土,在防止砼板衬砌渠道的冻胀破坏方面已被国内外有关单位多次试验证明是一种好的防冻措施,可有效地减小冻胀量,提高砼板的防渗效果和使用寿命。但是这里所说的砂砾石一般指中、粗砂以上的粗骨料而言,而对于以细砂即0.5～0.05毫米粒径含量为主的细骨料能否用作换填材料,结论不一,有待通过试验和实际应用予以验证。我区地域辽阔,阿拉善盟,伊克昭盟、巴彦淖尔盟、哲里木盟、赤峰市等地都有储量丰富的风积砂,这种砂属于岩石中的风化产物,受风力搬动堆积而成,其特点是颗粒均匀,粉粘粒
The use of sand and gravel as a cushion to replace the frost heave base soil in the prevention of concrete slab lining channels of frost heaving damage has been repeatedly tested by domestic and foreign units is a good antifreeze measures can effectively reduce the freezing Expansion, improve the anti-seepage effect of concrete panels and service life. However, as used herein, gravel generally refers to medium and coarse aggregates of coarse sand or more, but whether or not fine aggregates mainly composed of fine sand having a particle size of 0.5 to 0.05 mm can be used as a replacement material, First, to be verified through experiments and practical applications. My area has a vast territory, Alxa League, Iqzhao League, Bayannur League, Zheli League, Chifeng City and other places have rich reserves of aeolian sand, the sand is a weathering product in the rock, by the wind moving Stacked, which is characterized by uniform particles, powder clay