金中都水关遗址木结构含水率及其影响因素  

Moisture content and its influencing factors of wood structures at Shuiguan Site in Jinzhongdu Watergate Site of Beijing

作　　者：周浩宇 彭林 张厚江[1] 宗圆圆 王群 石金山 麻润杰 Zhou Haoyu;Peng Lin;Zhang Houjiang;Zong Yuanyuan;Wang Qun;Shi Jinshan;Ma Runjie(Joint International Research Institute of Wood Nondestructive Testing and Evaluation,School of Technology,Beijing Forestry University,Beijing 100083,China;School of Materials Science and Technology,Beijing Forestry University,Beijing 100083,China;Beijing Archaeological Site Museum,Beijing 100069,China;Power China Beijing Engineering Corporation Limited,Beijing 100024,China)

机构地区：[1]北京林业大学工学院木材无损检测国际联合研究所,北京100083 [2]北京林业大学材料科学与技术学院,北京100083 [3]北京考古遗址博物馆,北京100069 [4]中国电建集团北京勘测设计研究院有限公司,北京100024

出　　处：《北京林业大学学报》2023年第5期143-154,共12页Journal of Beijing Forestry University

基　　金：北京市科学计划公益应用类项目(Z090506016609002);中都水关遗址木结构病害调查横向项目(2021HXFWGXY012)。

摘　　要：【目的】金中都水关遗址现存的木结构面临腐朽的威胁,含水率是决定木材是否发生腐朽的关键因素,研究水关遗址木结构自身的含水率情况以及影响因素,旨在为金中都水关遗址木结构以及同类型地下木结构的保护和修缮提供依据和参考。【方法】于2021年9月26日检测木结构不同位置的木材含水率,监测2021年9月-2022年9月全年木结构不同位置木材、土壤含水率及环境温湿度变化,探测地下水,进行木材在土壤中平衡含水率实验等。汇总所得数据,分析影响木结构含水率的因素及其影响作用。【结果】遗址木结构露出地面的部分,含水率处于14.6%~23.6%;遗址木结构埋在土壤中的部分,含水率处于30.0%~183.3%;空气温度、湿度全年变化范围分别为13~24℃、27.0%~80.0%,受四季影响明显;遗址土壤含水率在1.5%~18.0%之间,深度越大,土壤含水率越高;地下水水位低于遗址过水道地面10.0 m以上;遗址木材在土壤中的平衡含水率与土壤含水率线性正相关,决定系数达到0.939 9。【结论】遗址木结构露出地面的部分,含水率处于木材腐朽发展停止的范围,含水率变化主要受空气的四季温湿度变化影响;遗址木结构埋在土壤中的绝大部分,含水率处于木材腐朽发展的范围,影响其含水率的因素主要为土壤含水率;地下水对遗址木结构含水率几乎无影响。[Objective]The surviving wooden structures at the Jinzhongdu Watergate Site are suffering from decay,and the moisture content of the wood is a key factor in determining decay,therefore,the study of the moisture content of the wooden structure of the watergate site and the factors affecting it aims to provide a basis and reference for the conservation and repair of the wooden structures of the Jinzhongdu Watergate Site as well as the underground wooden structures of the same type.[Method]The researchers detected the moisture content of wood at different locations of wooden structures on September 26,2021,and had monitored the changes in wood and soil moisture content and environmental temperature and humidity at different locations of wood structures for the whole year from September 2021 to September 2022.Groundwater was detected,and experiments on the equilibrium water content of wood in soil were conducted to summarize the obtained data,and analyze the factors affecting the moisture content of wood structures and their influencing effects.[Result]The moisture content of the exposed part of the wooden structures of the site ranged from 14.6%to 23.6%.The part of the wooden structures of the site was buried in the soil,with moisture content in the range of 30.0%−183.3%.The air temperature and humidity at the site ranged in 13−24℃and 27.0%−80.0%throughout the year,respectively,and were significantly affected by the seasons.The soil moisture content of the site ranged from 1.5%to 18.0%,and the greater the depth was,the higher the soil moisture content was.The groundwater level was more than 10.0 m below the streamway surface of the site.The equilibrium moisture content of site wood in soil was linearly and positively correlated with soil moisture content,with a coefficient of determination of 0.9399.[Conclusion]The moisture content of the exposed part of the wooden structures of the site is in a state that the development of wood decay has stopped,and the moisture content is mainly affected by the seasonal c

关 键 词：金中都水关遗址 木结构 木材腐朽 土壤含水率 木材含水率 平衡含水率 

分 类 号：TU366.2[建筑科学—结构工程] TS67[轻工技术与工程] K246.4[历史地理—历史学]