冻结技术在地铁及隧道工程中的应用

Artificial Ground Freezing Applying to Metro and Tunnel

冻结技术是利用人工制冷技术原理来加固软弱地层的技术。介绍了冻结技术的主要工艺过程及基本原理,列举了冻结技术在地铁和隧道工程中的主要应用领域。对影响冻结加固土体强度和稳定性的冻土温度场进行了分析,对冻土的抗压强度和抗剪强度进行了试验研究。结合实际工程阐述了冻结技术加固隧道计算模型,并对地铁和隧道工程中应用冻结技术所带来的环境岩土工程问题进行了探讨。

The artificial ground freezing is a technology to reinforce the soft soil with the theory of artificial freezing. In this paper the main technology and the basic theory of artificial ground freezing are introduced, and the main fields of its application are listed. The temperature field which affects the strength and the stability of soil reinforced by the artificial ground freezing is researched. The experiments which test the press strength and the shear strength are also researched. The calculating model about artificial ground freezing applying to a tunnel in shanghai is set forth. Some environment questions about artificial ground freezing are discussed.