基于SH加固材料的土遗址夯土试样室内滴渗试验研究

Laboratory tests on rammed earth samples of earthen sites instilled by reinforcement material SH

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。

The earthen sites in the northwest arid area of China are suffering ~om surface weathering heavily. Currently, the main way to solve the difficulty depends on the researches on anti-weathering materials and their engineering reinforcement and repair. However, the researches on anti-weathering materials cannot satisfy the practical engineering at present. The penetration diameter and the distribution and changing characteristics of penetration rate on the surface of the rammed samples are studied when they are instilled by different concentrations of SH as well as the change of wave velocity and the disintegration on the wall after penetration. The test results indicate that the optimal grouting capacity 0fa single hole is 30~40 mL, the instilling penetration at this time is about 300 min, and the final surface penetration radius is 3 ~4 cm. After instilled by SH, the wave velocity and the anti-disintegration of the samples obviously increase, especially for the 1.0% SH.