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表面严重风化是中国西北干旱地区土遗址的主要病害之一。目前解决防风化问题的主要方法是通过研制的防风化加固材料进行工程加固和修复,然而防风化加固材料的研制尚无法满足实际工程的要求。系统研究了不同浓度SH滴渗夯土试样表面渗透半径和渗透速率的分布变化规律,及渗透加固后试样波速和崩解性的变化。试验结果表明,单孔最优注浆量为30~40 m L,此时滴渗时间约为300 min,最终表面渗透半径为3~4 cm。渗透后试样波速升高,抗崩解性能明显提高,以1.0%SH渗透后最为明显。
Severe surface weathering is one of the major diseases of the soil sites in arid areas of northwestern China. At present, the main method to solve the problem of weathering is to reinforce and repair the works through the developed windbreaking reinforcement materials. However, the development of the windbreaking reinforcement materials is still unable to meet the requirements of actual projects. The variation of penetration radius and permeation rate on the surface of samples with different concentrations of SH drip-forming ramie soil and the changes of wave velocity and disintegration of the sample after the permeation strengthening were systematically studied. The experimental results show that the optimal single-hole grouting amount is 30-40 m L, the time of dripping is about 300 min, and the final surface infiltration radius is 3-4 cm. After penetrating, the wave velocity of the sample increased, the anti-disintegration property was obviously improved, which was the most obvious after penetrating 1.0% SH.