盾构隧道水平单孔多次爆破超前致裂数值模拟研究  

Numerical Simulation Study on Advanced Cracking of Horizontal Single Hole Multiple Blasting in Shield Tunnel

作　　者：杜亮亮 杨坤 陈松 黄小武[3] 樊帅 陈德志 周钰焱 伍岳 DU Liangliang;YANG Kun;CHEN Song;HUANG Xiaowu;FAN Shuai;CHEN Dezhi;ZHOU Yuyan;WU Yue(China Railway 14th Bureau Group Shield Engineering Co.,Ltd.,Nanjing 211800,Jiangsu,China;School of Digital Construction and Blasting Engineering,Jianghan University,Wuhan 430056,Hubei,China;Wuhan Explosion&Blasting Co.,Ltd.,Wuhan 430056,Hubei,China)

机构地区：[1]中铁十四局集团大盾构工程有限公司,江苏南京211800 [2]江汉大学数字建造与爆破工程学院,湖北武汉430056 [3]武汉爆破有限公司,湖北武汉430056

出　　处：《江汉大学学报(自然科学版)》2025年第1期14-23,共10页Journal of Jianghan University:Natural Science Edition

基　　金：中国工程院战略研究与咨询项目(2023-XZ-35);湖北省重点研发计划项目(2020BCA084)。

摘　　要：针对盾构法隧道掘进过程中经常遇到坚硬基岩侵入的问题,结合钻爆法和盾构法隧道掘进施工特点,提出了一种盾构隧道水平单孔多次爆破超前致裂技术,并采用ANSYS/LS-DY⁃NA软件开展数值模拟研究。结果表明,运用完全重启动技术和初始体积分数法,后续爆破完全继承了模型上一次爆破后的应力与损伤等相关变量,经过水平单孔3次爆破,隧道模型炮孔底部空腔半径由10 cm逐步扩大至35 cm,模型轴向损伤影响深度由125 cm逐步扩大至916 cm,径向损伤影响半径由68 cm逐步扩大至整个断面,且对隧道周边围岩的损伤较小,可实现盾构隧道掘进路线岩体的超前致裂效果。Aiming at the problem of hard bedrock intrusion often encountered in the process of shield tunnel excavation,based on the characteristics of drilling and blasting method and shield tunnel excavation construction,a kind of advanced fracturing technology of shield tunnel horizontal single hole multiple blasting was proposed,and the numerical simulation research was carried out by ANSYS/LS-DYNA software.The results showed that using the complete restart technology and the initial volume fraction method,the subsequent blasting perfectly inheritsed the related variables such as stress and damage after the previous model blasting.After three times of horizontal single-hole blasting,the cavity radius at the hole bottom of the tunnel model was gradually expanded from 10 cm to 35 cm,the axial damage influence depth of the model was gradually expanded from 125 cm to 916 cm,and the radius of the radial damage influence was slowly expanded from 68 cm to the whole section.The damage to the surrounding rock of the tunnel was small,and the advanced cracking effect of the rock mass on the shield tunnel excavation route can be realized.

关 键 词：盾构隧道 超前致裂 爆破损伤 数值模拟 

分 类 号：TD235[矿业工程—矿井建设]