砂卵石地層地鐵聯(lián)絡(luò)通道凍結(jié)溫度場發(fā)展研究

打開文本圖片集

【中圖分類號】：TU475.2 【文獻(xiàn)標(biāo)志碼】：A 【文章編號】：1008-3197（2025）02-10-06

【DOI編碼】：10.3969/j.issn.1008-3197.2025.02.003

Research on the Development of Freezing Temperature Field of Subway Cross Passage in Sand-gravel Stratum

ZHANG Zhicheng， ZHU Pengye

（Tianjin Municipal EngineeringDesign&Research InistituteCo.Ltd.，Tianjin3Oo392，China）

【Abstract】 ∵ Inorder to perceive the development law of frozen temperature field.This paper taking actual engineering as an example，basedonon-site temperature monitoringdata，the development law of thegeologicaltemperature fieldduring the freezing process is analyzed.Theresearch results indicate thatthe temperature change trend at each measuring point during the freezing period is roughly the same，experiencing three stages：rapid cooling，slow cooling，and maintenance freezing.The inner side of the frozen wall is afected by excavation，and the heat exchange between the soil andair intensifies，resulting ina temperature rise phenomenon.The minimum freezing development speed of the temperature measurement hole is taken as the average expansion speedof the frozen wallAfter 38 days of freezing，the minimum development radius of the single-sided frozen wall is 1292m ：

【Key words】：subway cross passage；freezing method；sand-gravel stratum；temperature field

人工凍結(jié)法憑借綠色環(huán)保、止水和加固效果好、凍結(jié)范圍可控等優(yōu)勢，成為加固地層的一種行之有效的方法，在地鐵暗挖工程中被廣泛應(yīng)用。（剩余5285字）