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坍塌或差异风化所产生的遗址体悬空现象在我国西北干旱区的土遗址中非常普遍,如何摸索出一种符合文物保护准则的保护技术就成为一大难题。本文依托交河故城悬空土质崖体,在现场详细调查的基础上,提出了悬臂式土遗址的两种可能失稳模式(剪切坠落和拉裂倾倒失稳),进而提出了危险块体的加固方案——槽钢支顶,详细介绍其施工工艺,并用数值模拟的方法比较加固前后的稳定性变化,结果表明此加固技术不仅可以满足稳定性的需求,还符合文物保护的理念。该研究结论对于悬空状态的土遗址本体和载体的加固具有重要的参照意义。
The phenomenon of vacant sites caused by collapse or differential weathering is very common in the earthen sites in the arid region of northwestern China. How to explore a protection technology that meets the criteria for the protection of cultural relics has become a major challenge. Based on the detailed investigation of the site, two possible destabilization modes of cantilever earth sites (shear crashes and fracture instability) are put forward based on the hanging cliffs of the old city of Jiaohe River, and then the dangerous blocks Reinforcement scheme - channel support, the construction technology is introduced in detail, and the stability changes before and after reinforcement are compared by numerical simulation. The results show that this reinforcement technology can not only meet the requirements of stability, but also accord with the concept of cultural relic protection. The conclusion of this study is of great significance for the reinforcement of the prophase body and carrier in the suspended state.