不同开口率下盾构机刀盘与开挖面相互作用试验研究  

Experimental Study on the Interaction Between Excavation Face and Cutter Head of Shield Tunneling Machine with Different Opening Rate

作　　者：胡光静 袁岳峰 余昆 Hu Guangjing;Yuan Yuefeng;Yu Kun(China Railway Guangzhou Engineering Group Co.,Ltd.,Guangzhou 511457,China)

机构地区：[1]中铁广州工程局集团有限公司,广东广州511457

出　　处：《华东交通大学学报》2023年第2期16-21,共6页Journal of East China Jiaotong University

基　　金：国家自然科学基金项目(52078213);江西省杰出青年基金项目(20192ACBL21003)。

摘　　要：开口率是盾构机刀盘的重要结构参数,其大小直接关系到刀盘与开挖面的相互作用。通过设计1∶10的模型试验,实现了刀盘开口率可调及渣土实时称量,从而间接地实现了对土舱饱满度的控制。试验研究分析表明:在实际出土率与理论出土率相等的条件下,增大刀盘开口率可减小刀盘面而与开挖面的接触面,从而减小刀盘扭矩,刀盘开口率增大了10%,刀盘扭矩减小约5.8%;在相同的出土率时,刀盘的开口率对地表最大沉降影响不显著;而在土舱近似满舱状态下,刀盘空隙上的渣土对开挖面可起的支护作用。The opening rate is an important structural parameter of the shield machine cutter,and its size is directly related to the interaction between the cutter and the excavation surface.By designing a 1∶10 model test,it realizes adjustable opening rate of cutter and real time weighing of residue,thus indirectly realizing the control of soil chamber fullness.The study analysis showed that under the condition that the actual rate of excavation is equal to the theoretical rate of excavation,increasing the rate of cutter opening can reduce the contact surface between the cutter surface and the excavation surface,thus reducing the cutter torque,showing a 10%increase in cutter opening rate and an approximate 5.8%reduction in cutter torque.At the same emergence rate,the opening rate of the cutter has no significant effect on the maximum settlement of the ground surface.The slag soil on the cutter gap can have the support effect on the excavation surface when the soil compartment is nearly full.

关 键 词：盾构隧道 盾构施工 刀盘扭矩 刀盘开口率 地表沉降 

分 类 号：U452[建筑科学—桥梁与隧道工程]