人工冻结法是一种利用热交换进行地层加固的施工技术,其加固效果受地层热物理性质影响明显。为了厘清复合地层内冻结加固体的发展规律,通过模型试验方法对于符合地层界面附近的温度场进行了研究。结果表明:复合地层界面附近的冻结壁形态会发生明显变化,整个冻结锋面在过渡区内呈线性增减;由复合地层界面向一侧过渡区边缘的距离为0.8~1.0 m;两个不同地层冻结壁发展速率的差异趋势相变潜热不同步释放会使得部分区域冻结壁在积极冻结中后期出现加速发展特点。针对过渡区温度场分布特点,给出了针对性的温度场解析解,并通过现场实测对其计算可靠性进行了验证。
The artificial ground freezing method is a construction technique that strengthens the formation through heat exchange, and its reinforcement effectiveness is significantly influenced by the thermo-physical properties of the formation. In order to clarify the development trend of frozen reinforcement in complex formations, a study was conducted on the temperature field near the formation interface through model experiments. The results show that: The morphology of the frozen wall near the complex formation interface will undergo significant changes, with the entire frozen front linearly increasing and decreasing in the transition zone. The distance from the complex formation interface to the edge of the transition zone is 0.8~1.0 m. The difference in the development rate of frozen walls of two different formations, as well as the asynchronous release of phase change latent heat, causes some frozen walls in certain areas to exhibit accelerated development characteristics in the later stages of active freezing. In response to the temperature field distribution characteristics in the transition zone, a targeted analytical solution for the temperature field is proposed, and its computational reliability is verified through on-site measurements.
[1] 徐建卫.联络通道冻结法施工长距离盐水循环系统方案研究[J].建井技术,2022,43(2):63-66.
[2] 徐旭.液氮冻结法在大型管线抢修施工的应用-以迪士尼为例[J].城市建筑,2022,19(8):147-149.
[3] 李芳舒.基于冻结法的地铁联络通道施工技术研究[J].科技创新与应用,2024,14(7):189-192.
[4] 苏立凡,宁方波,徐兵壮.直墙式多排管冻结壁温度场和平均温度计算[J].建井技术,2023,44(6):1-11.
[5] 周晓敏,张绪忠.冻结器内测温判定冻结壁厚度的研究[J].煤炭学报,2003(2):162-166.
[6] 方涛,胡向东.广义单排管冻结稳态温度场解析解[J].煤炭学报,2019,44(增2):535-543.
[7] 周扬,周国庆.考虑未冻水单管冻结温度场解析解[J].煤炭学报,2012,37(10):1649-1653.
[8] Zhang S,Yue Z R,Sun T C,et al.Analytical determination of the soil temperature distribution and freezing front position for linear arrangement of freezing pipes using the undetermined coefficient method[J].Cold Regions Science and Technology,2021,185:103253.
[9] Calderon D S,Palacio S O,Garcia S J I,et al.An adjusted analytical solution for thermal design in artificial ground freezing[J].International Journal of Rock Mechanics and Mining Sciences,2023,164:105310.
[10] 王书磊,丁国胜,吴强.复杂工况下超长联络通道冻结法设计与施工[J].地下空间与工程学报,2021,17(6):1894-1905.
[11] 刘冠军,马强.城市地铁联络通道施工经验及监理控制要点-以佛山地铁联络通道施工为例[J].建设监理,2023(5):24-27,55.
[12] 吴涛,周晓敏,刘书杰,等.基于冻结器内纵向测温的冻结壁薄弱点精准定位技术[J].煤炭工程,2020,52(12):51-54.
[13] 叶玉西.冻结器内纵向测温判定冻结壁出水位置技术[J].煤炭科学技术,2015,43(3):13-16.
[14] 张松,周晓敏,张基伟,等.基于冻结器温升公式的单排管温度场求解方法[J].铁道科学与工程学报,2024,21(3):1102-1113.
[15] 张基伟,刘志强,单仁亮,等.复杂地层井筒冻结壁异常状况监测技术研究现状与展望[J].煤炭科学技术,2019,47(1):103-109.
[16] 张基伟,郑新赟,韩玉福.超声波检测技术在粉细砂层冻结壁扩展速度判定中的应用[J].建井技术,2018,39(5):33-36.
[17] 许勇,李哲宇,张炜,等.土压平衡盾构穿越富水复合地层渣土改良及掘进参数研究[J/OL].铁道标准设计(2025-6-13).https://doi.org/10.13238/j.issn.1004-2954.202312130004.
[18] 陈星欣,何明高,施文城,等.土岩复合地层盾构地中对接法刀盘拆卸不完全拱压力计算[J].2024,46(12):2652-2660.
[19] 康健,张善,马英博,等.富水复合地层的冻结加固施工方法研究[J].中国设备工程,2023(20):23-25.
[20] 张世雷,汪磊,何越磊,等.复合地层联络通道冻结温度场发展规律研究[J].地下空间与工程学报,2022,18(增1):266-273.
[21] 上海市建设和交通委员会.旁通道冻结法技术规程(DG/TJ08-902-2023)[S].2016.
[22] 王彬,荣传新,程桦.定向渗流诱导的非对称冻结帷幕稳态温度场解析解[J].工程科学与技术,2022,54(4):76-87.
[23] 邰博文,刘建坤,房建宏,等.高温冻土区高速公路特殊结构路基地温分布特征及降温效果分析[J].岩石力学与工程学报,2017(增1):3696-3704.
[24] 李方政,夏明萍.基于指数积分函数的人工冻土温度场解析研究[J].东南大学学报(自然科学版),2004(4):469-473.
[25] 胡传鹏,胡向东,朱合华.单排管冻结巴霍尔金温度场控制参数敏感度分析[J].煤炭学报,2011,36(6):938-944.
[26] 胡向东,赵俊杰.人工冻结温度场巴霍尔金模型准确性研究[J].地下空间与工程学报,2010,6(1):96-101.
