盾构刀盘和盾体的冻结壁设计与分析  

DESIGN AND ANALYSIS OF FROZEN WALL OF SHIELD CUTTERHEAD AND SHIELD BODY

作　　者：徐沣 孙绍哲 刘贺江 张睿智 XU Feng;SUN Shaozhe;LIU Hejiang;ZHANG Ruizhi(Liaoning Censcience Industry Co.,Ltd.,Liaoning Liaoyang 111000,China)

机构地区：[1]辽宁三三工业有限公司,辽宁辽阳111000

出　　处：《低温建筑技术》2022年第7期166-170,共5页Low Temperature Architecture Technology

摘　　要：以沈阳地铁4号线沈阳北站-皇寺广场站地铁施工穿越站台桩基为背景,在盾构连续穿越桩基且无地面加固的条件下,采用盾构冷冻作为截桩过程中的开舱换刀加固措施,以水土压力计算和数值分析的方式确定出合理的盾构刀盘、盾体位置冻结壁厚度,并根据计算结果进一步分析换刀过程。最后证明冻结壁能够增强地层抗压能力,为开舱换刀提供有效的支撑。In the section between Shenyang North Station and Huangsi Square Station,the construction of the sub⁃way across the pile foundations.Under the condition that the shield machine advances through the pile foundation continuously without ground reinforcement,the shield frozen is adopted as the reinforcement measure of the cutters exchanging in the process of cutting piles.The freezing of the shield is used as the reinforcement measure for opening the compartment and changing the cutter in the process of pile cutting.The reasonable thickness of the frozen wall at the shield cutter head and shield body position is determined by means of water and soil pressure calculation and nu⁃merical analysis,and the tool changing process is further analyzed according to the calculation results.Finally,it is proved that the frozen wall can enhance the compressive capacity of the formation and provide effective support for opening the compartment and changing the cutter reinforcement.

关 键 词：刀盘冻结 盾体冻结 冻结壁分析 冷冻换刀 

分 类 号：TU473.2[建筑科学—结构工程]