北石窟寺降雨与洞窟相对湿度变化规律研究

为了研究降雨对北石窟寺渗水病害的影响,通过2002~2008年每日三次的人工监测,对北石窟寺165窟、222窟、240窟的相对湿度变化及大气降雨进行记录,对降雨量与洞窟相对湿度变化规律进行分析。结果表明:2002~2007年,洞窟年平均相对湿度与年降雨总量变化趋势一致,2007年后由于人为活动的影响,变化趋势关联度很低;洞窟月相对湿度与月降雨总量变化趋势相同;一次降雨的直接影响在降雨1d前发生,降雨前和降雨后的两天为气压降低引起的毛细水上升高度增加引起的湿度增加;裂隙水和渗流补给在3 d后开始发挥作用,洞窟湿度增加,影响时间约14 d;降雨对洞窟相对湿度更大的作用表现为变化频率及幅度的增加;洞窟湿度常年稳定在55%以上,说明洞窟存在稳定的补给源,最有可能为赋存在窟前平台的基岩裂隙水。

Study On Variation Of Rainfall And Relative Humidity Of Caves In The Beishiku Cave Temple

In order to study the impact of rainfall on the Beishiku Cave Temple seepage disease, through the artificial monitoring 2002~2008 three times a day, the change of relative humidity and rainfall of 165 caves, 222 caves,240 caves in the Beishiku Cave Temple were recorded, analysis of rainfall and relative humidity variation of caves, the results showed that: from 2002 to 2007, the average relative humidity is consistent with changes in annual rainfall total cave-year trend, after 2007, because of the impact of human activities associated with very low tendency; Monthly relative humidity and monthly total rainfall is the same trend of the caves; A direct impact on rainfall in the rain one day before they occur, capillary water before the rain and after two days of rain caused by the rise of pressure to reduce the height of the increase due to increased humidity; Fissure water and seepage into play in 3 days, humidity of caves were increased, the impact time is about 14 days; Rainfall will lead to the caves of relative humidity change frequency and amplitude increased; The humidity of caves are stable at more than 55%, illustrate that the existence of caves have a stable supply source, most likely to exist in the platform of bedrock fissure water.