制备方法对土遗址重塑样稳定性的影响研究

Study of the influence of preparation methods on the stability of remolded soil samples for earthen sites

土建筑遗址本体的保护受遗址土的物理、水理、力学及所处环境差异的影响,重塑样是替代土遗址测试其各种性质的重要手段,重塑样拌制土性质的稳定性是科学评价、对比分析试验研究的基础和前提。本研究基于不同拌制土的方法,通过观察、拍照、量取土团粒大小以及同条件制备样品的无侧限抗压强度等,综合评价不同拌制土方法的影响条件。研究发现,采用人工拌土、闷土时间在24 h的土所制的试样最具稳定性,随着闷土时间再增加,土样强度在逐渐降低。本研究为土建筑遗址室内试验研究和工程现场拌制土料提供理论参考和技术支撑。

The physical,hydraulic and mechanical properties of site soil,as well as the environmental differences found there,have impacts on the conservation of earthen construction sites as a whole.The stability of remixed soil properties of remolded samples is the basis and prerequisite for scientific evaluation and comparative analysis of experimental studies,since using remolded samples instead of earthen sites are an important means for testing various properties.In this study,based on different methods of soil mixing,we comprehensively evaluated the influencing conditions of different soil mixing methods by observing,photographing,measuring the sizes of soil aggregates and testing the unconfined compressive strengths of samples prepared under the same conditions.According to the results,the most stable soil samples were those which had been smothered for 24 hours,and the strengths of the soil samples gradually decreased with the increase of the smothering time again.This study provides theoretical and technological support for the indoor experimental research on soil mixing of earthen construction sites.