小气候影响下那曲高海拔地区综合管廊建设区域环境温度研究

Study on the Ambient Temperature of the Integrated Pipe Gallery Construction Area in the High Altitude Area of Naqu under the Influence of Microclimate

高海拔地区的特殊气候条件可能导致施工周期延长、质量下降等问题,通过研究那曲高海拔地区小气候对管廊建设区域环境温度的影响规律,可以采取相应的措施,减小其对于综合管廊施工的影响。文章依托那曲市在建综合管廊项目,对高海拔建设区域的外部环境在不同气象因素影响下的变化规律进行了研究。结果表明:(1)建筑密集或墙角处土表温度较高;平坦开阔处等区域土壤温度随深度的增加基本呈线性变化,而阴影处等区域随土壤深度的增加先增大后减小;(2)在无太阳的情况下,土表温度基本与空气温度一致;太阳辐射强度较大时,房屋墙角及公园内土壤温度较高;而太阳直接照射到的面位于迎风面时,土壤温度会明显降低;(3)风速越低,土壤温度越高。当风速为0 m/s时,房屋密集的位置与平坦开阔处土表温度基本一致;2~10 m/s风速情况下迎风面低,背风面高,阴影处小于太阳直接照射处;(4)气温越低,土温越低,气温较高时,区域内土温整体温度较高,背风面土温会出现热量集中的现象;(5)当气温>5℃时,土壤温度随着土壤深度的增加线性降低;气温在5~-5℃时,其随土壤深度的增加而先增大后减小;气温<-5℃时,其在接近地表的位置随着深度的增加迅速增大,而后趋于平稳;(6)较小的气压变化情况下,气压对土壤温度的影响较小。

The unique climatic conditions of high-altitude regions can lead to extended construction timelines and reduced quality.By studying how the microclimate in the Naqu high.altitude area affects the ambient temperature in pipeline corridor construction zones,we can implement targeted measures to minimize its impact on the construction process.This study,based on the ongoing comprehensive pipeline corridor project by the Naqu city government,examines the patterns of environmental changes in high-altitude construction areas under various meteorological influences.The findings reveal that:(1)Soil surface temperatures are higher in densely built areas or near building corners.In contrast,in flat and open areas,soil temperature generally increases linearly with depth.However,in shaded areas,soil temperature first increases with depth and then decreases.(2)In the absence of sunlight,the soil surface temperature is generally consistent with the air temperature.When solar radiation is intense,soil temperatures are higher near building corners and within parks.However,when the sunlit surface faces the wind,the soil temperature decreases significantly.(3)Lower wind speeds result in higher soil temperatures.When the wind speed is 0 m/s,soil surface temperatures in densely built areas and flat,open spaces are generally the same.At wind speeds between 2 m/s and 10 m/s,soil temperatures are lower on the windward side,higher on the leeward side,and lower in shaded areas compared to those directly exposed to sunlight.(4)As air temperature decreases,soil temperature also drops.When air temperature is higher,the overall soil temperature in the area rises,with heat concentration occuring on the leeward side.(5)When the air temperature is above 5 C,soil temperature decreases linearly with increasing soil depth.When the air temperature is between59C and-59C,soil temperature initially increases with depth and then decreases.When the air temperature drops below-5 C,the soil temperature near the surface rises rapidly with depth before stabilizing.(6)Minor changes in atmospheric pressure have lttle impact on soil temperature.