西北师范大学学报（自然科学版）2025，Vol.61Issue(6)：14-23,10.DOI:10.16783/j.cnki.nwnuz.2025.06.003
土遗址冻融影响下浅表层片状剥落宏微观特性研究
Macro-micro characterization of shallow surface layer flake spalling under the influence of freezing and thawing on soil sites
摘要
Abstract
As important cultural heritage sites,earthen ruins are subject to sheet-like spalling in their shallow layers due to freeze-thaw cycles and other factors,posing a serious threat to long-term preservation.This study investigates the macro-and micro-level characteristics of flaking damage in the Shidonggouliang Great Wall under freeze-thaw conditions in high-altitude,semi-arid regions.Based on the collection of environmental data from the Shidonggouliang Great Wall area,field surveys were conducted to measure flaking conditions,wave velocity values,and temperature parameters in various sections of the flaking areas.Subsequently,microscopic tests such as particle analysis,XRD,and soluble salt content were carried out to further understand the microscopic characteristics of the flaking damage.Based on the macro-and microscopic parameter characteristics,the layering phenomenon during the formation of flaking damage in soil sites induced by freeze-thaw cycles was analyzed.The results indicate that the macro-and microscopic characterization methods used can effectively reflect the characteristics of flaking damage.Freeze-thaw cycles in high-altitude semi-arid environments cause significant macro-and micro-level damage to soil sites,with distinct differences between the crust layer and the powdery layer.The crust layer is dense and resistant to erosion but prone to thermal stress cracking,while the powdery layer is loose,rich in salts,and prone to disintegration.This dual-structure characteristic is the core feature of flaking damage.This study provides important evidence for understanding the formation process of flaking damage and offers a theoretical basis for the protection of soil sites.关键词
土遗址/冻融循环/高寒半干旱/片状剥落/宏微观特性Key words
earthen sites/freeze-thaw cycle/high-altitude semi-arid/flaking/macro-and micro-scale characteristics分类
建筑与水利引用本文复制引用
赵欣儿,张景科,张浩,齐博嘉,陈涛,王彦武..土遗址冻融影响下浅表层片状剥落宏微观特性研究[J].西北师范大学学报（自然科学版）,2025,61(6):14-23,10.基金项目
国家重点研发计划项目(2023YFF0905903-2) （2023YFF0905903-2）
