干旱地区砖构建筑遗产墙体水分含量变化研究——以嘉峪关关城东闸门为例

Studying on Moisture Change of Brick Building Heritage Wall in Arid Area——Taking the Dongzhamen of Jiayuguan Pass for Example

嘉峪关关城东闸门城台外部墙面主要由青砖砌筑,内部由黄土夯筑,由于嘉峪关自然气候和关城建筑布局,使得东闸门城台墙体出现墙面返潮泛碱、砖体酥碱碎裂脱落等病害,严重影响了关城的结构稳定性和观赏性.通过监测东闸门城台东南面墙体水分含量,分析墙体水分含量变化规律,进一步了解墙体内水分运移情况;同时结合定点拍摄监测方法,研判病害发育情况,评估墙体酥碱程度,实现了定量和定性的病害监测,也为下一步监测工作提供指导.

The outer wall of the Dongzhamen of Jiayuguan pass is mainly built by blue brick,while the in-ner wall is built by loess.Due to the natural climate and the architectural layout of Jiayuguan pass,the wall of the Dongzhamen appears such diseases as Get damp whiskering,the wall disrupted,brick fragmentation and fall-ing off,which seriously affects the structural stability and appreciation of the building.By monitoring the mois-turecontent of the wall in the southeast of the Dongzhamen,the variation law of the moisturecontent of the wall is analyzed to further understand the moisture movement in the wall.At the same time,combined with the fixed-point shooting monitoring method,the disease development was researched and the wall disrupted was evaluated,which achieve the disease monitoring both quantitative and qualitative methods and provide guidance for the next monitoring work.