CAJ | 학술논문

盾构是土质隧道(洞)全断面开挖的高效、环保、安全、优质的地下工程施工机械,在国内城市地铁建设中已被广泛应用.盾构的始发掘进是盾构施工的关键技术之一,通过对盾构正常掘进和始发掘进的分析,引用土力学的基本原理,建立土压平衡盾构在这两种掘进模式下的力学模型,给出了土压平衡盾构在这两种掘进模式下的阻滞力矩计算公式,并对盾构正常掘进模式下阻滞力矩的构成和作用进行了分析.研究结果表明,正常掘进模式下,洞壁产生的阻滞力矩足以克服盾构刀盘刀具切削土体产生的反扭矩;而盾构在始发掘进时,必须在其托垫与其盾壳间采取防扭转措施.以在施工的某土压平衡盾构隧道工程为例,对所建立的公式进行了应用研究,取得了良好效果,可为土压平衡盾构的设计和应用提供参考.
순구시토질수도(동)전단면개알적고효、배보、안전、우질적지하공정시공궤계,재국내성시지철건설중이피엄범응용.순구적시발굴진시순구시공적관건기술지일,통과대순구정상굴진화시발굴진적분석,인용토역학적기본원리,건립토압평형순구재저량충굴진모식하적역학모형,급출료토압평형순구재저량충굴진모식하적조체력구계산공식,병대순구정상굴진모식하조체력구적구성화작용진행료분석.연구결과표명,정상굴진모식하,동벽산생적조체력구족이극복순구도반도구절삭토체산생적반뉴구;이순구재시발굴진시,필수재기탁점여기순각간채취방뉴전조시.이재시공적모토압평형순구수도공정위례,대소건립적공식진행료응용연구,취득료량호효과,가위토압평형순구적설계화응용제공삼고.
@@@@Shield is a kind of underground construction machinery used to excavate soil tunnel with efficiency, environmental protection, safety and high quality, and it is employed widely in city metro construction in China. The origin driving of shield is one of the key techniques in shield construction. Through analyzing normal and origin driving shields, the mechanical model of shield driving in the two driving modes is established with reference to fundamental principles of soil mechanics. The calculation formula for resistance moment of the shield is presented, and the composition and effects of resistance moment of normal driving mode of shield are analyzed. It is discovered that in the normal driving mode, the resistance moment from the cave wall is strong enough to countervail the reverse torque resulted from the shield chisels’ cutting rock, and during the origin driving, protective measures should be taken in between shield cushion and its crust to prevent torsion. The formula has been adopted in some earth pressure balance (EPB) shield tunneling construction project with good results achieved. Conclusions can be referenced for the design and application of EPB shield.