岩土力学2024，Vol.45Issue(8)：2299-2310,12.DOI:10.16285/j.rsm.2023.1401
考虑温度效应的盾构刀盘黏附试验及堵塞防治
Adhesion test and blockage prevention of shield tunneling cutterhead considering temperature effect
摘要
Abstract
In cohesive strata,earth pressure balance shield tunneling often encounters issues such as mud cake formation and cutting edge blockage.These problems not only hinder the efficient discharge of excavated material,leading to decreased excavation efficiency,but also increase the risk of frequent silo openings during the construction process.Furthermore,heat generated during excavation can affect soil adhesion.To explore the adhesion effects on the cutter head considering cutter head temperature,water content,clay content,clay type,and other factors,a self-developed rotary adhesion test system for the cutter head was employed.The system also examined the preventive and control effects of foam agents and anti-adhesion agents at different mixing ratios to mitigate blockage.The findings indicate that an increase in temperature reduces rotational torque and soil adhesion on the cutter head's surface,but it accelerates clay hardening.The trends of soil moisture content and clay content on torque are inverse,yet they similarly affect adhesion.As moisture content or clay content increases,adhesion initially increases and then decreases.The highest adhesion occurs at 20％moisture content and 30％clay content.Furthermore,bentonite exhibits greater adhesion compared to kaolin.The adhesion effects of soil moisture content,clay content,and clay type can be assessed using a consistency index.As consistency increases,adhesion initially increases and then decreases.The soil shows the highest adhesion when the consistency index ranges between 0.5 and 0.75,and low consistency index soil is more temperature-sensitive.While the addition of foam agents alone decreases soil adhesion,substantial adhesion persists at a 70％injection ratio.However,a 50％injection ratio shows better improvement with the combined use of foam agents and anti-adhesion agents.Additionally,increasing the injection ratio has minimal impact on soil improvement.These findings offer valuable guidance for evaluating blockage risks in earth pressure balance shield tunneling through cohesive strata and choosing suitable soil improvement strategies for cohesive soil remnants.关键词
土压平衡盾构/刀盘堵塞/黏性地层/温度效应/渣土改良Key words
earth pressure balance shield/cutter head clogging/viscous formation/temperature effect/muck improvement分类
建筑与水利引用本文复制引用
王修伟,李树忱,刘祥坤,万泽恩,彭科峰..考虑温度效应的盾构刀盘黏附试验及堵塞防治[J].岩土力学,2024,45(8):2299-2310,12.基金项目
国家自然科学基金青年科学基金(No.52108373,No.52308423) （No.52108373,No.52308423）
山东省自然科学基金(No.ZR2021ZD36,No.ZR2021QE127) （No.ZR2021ZD36,No.ZR2021QE127）
中国博士后科学基金面上资助(No.2022M723402).This work was supported by the National Natural Science Foundation of China for Young Scholars(52108373,52308423),the Natural Science Foundation of Shandong Province(ZR2021ZD36,ZR2021QE127)and the General Program of Postdoctoral Science Foundation of China(2022M723402). （No.2022M723402）
