CAJ | 학술논문

大连地铁203标段兴工街至西安路区间采用钻爆法施工。当地铁隧道与下部既有盾构主体结构叠落距离达到0.7m～2.0m时，普通的钻爆法会带来一系列不良的影响。为此将钻爆法改为人工机械开挖。但经过5天实践表明，人工机械开挖工效低，成本高以至于工程停滞。因此，采取新的弱爆破处理方式，在确保既有盾构主体结构完整的前提下，大幅度地降低了成本、缩短了工期，为同类工程施工提供指导性建议。
대련지철203표단흥공가지서안로구간채용찬폭법시공。당지철수도여하부기유순구주체결구첩락거리체도0.7m～2.0m시，보통적찬폭법회대래일계렬불량적영향。위차장찬폭법개위인공궤계개알。단경과5천실천표명，인공궤계개알공효저，성본고이지우공정정체。인차，채취신적약폭파처리방식，재학보기유순구주체결구완정적전제하，대폭도지강저료성본、축단료공기，위동류공정시공제공지도성건의。
Driling Blasting was used in the interval of Xinggong Street to Xi’an Road of Dalian subway line 2. The subway is in the above of a completed-Shield segments, the distance is 0.7 meters to 2.0 meters, ordinary driling blasting method wil bring a series of adverse effects. To change the driling blasting method to artificial-mechanical excavation. But after five days practice shows that low efficiency and high cost lead to the stagnation of the project. Therefore, a new weak blasting approach arises spontaneously, and breaking the routine of blasting particle vibration velocity as a single main reference data, based on the feedback of the actual construction site, ensure the structural integrity of completed-shield body, reduce the cost and shorten the construction period.