干旱环境下土遗址薄壁卷柏藓覆盖层作用效果

The effect of Racopilum cuspidigerum capping on earthen sites in an arid environment

为研究薄壁卷柏藓覆盖层对夯土遗址的作用,室内开展其透气性、雨蚀、温度敏感性和风蚀试验,探讨干旱胁迫下的透气性变化,以及5种覆盖度条件下的抗雨蚀、保温、隔热和抗风蚀能力.结果表明,薄壁卷柏藓在干旱胁迫下的透气性呈动态逐渐趋于稳定的变化过程,空气对流能够显著增大透湿率,有气流扰动的最终透湿率是无气流扰动的3.32倍;具有隔热和保温的双重特征,保温性能更突出;覆盖度的提高能显著提升抗雨蚀和抗风蚀能力,回归方程满足线性函数法则.

The effect of Racopilum cuspidigerum capping on earthen sites was studied through indoor experiments on the permeability,rain erosion,temperature sensitivity and wind erosion resistance.The changes in permeability under drought stress,the rain erosion resistance,insulation and thermal insulation performance,as well as wind erosion resistance under 5 different coverage conditions were explored.The results indicated that the permeability of moss under drought stress was a dynamic and continuous process that gradually stabilized.Air convection could significantly increase moisture permeability,and the final moisture permeability with airflow disturbance was 3.32 times that without airflow disturbance;the R.cuspidigerum cappinging had dual characteristics of heat insulation and preservation,and its preservation performance was more prominent;the increase in coverage could significantly enhance the resistance to wind(rain)erosion,and the regression equation satisfied the linear function rule.