中国工程科学
中國工程科學
중국공정과학
ENGINEERING SCIENCE
2014年
11期
58-64
,共7页
爆破设计%直眼掏槽%大直径中空孔%分部延时起爆%浅孔爆破
爆破設計%直眼掏槽%大直徑中空孔%分部延時起爆%淺孔爆破
폭파설계%직안도조%대직경중공공%분부연시기폭%천공폭파
blasting design%parallel cut%big empty hole%delay-time initiation%short-hole blasting
城市地铁区间隧道爆破施工中面临的一个重要问题就是降低爆破振动对临近地表建筑物的影响。青岛地铁一期工程03号线03标段下穿建筑物时，为了确保距隧道拱顶5～8 m的地表建筑物安全，采用了大中空孔直眼掏槽技术、一次起爆分部延时爆破、浅孔多眼等技术，将地表建筑物最大垂直振速控制在国标允许范围之内，隧道通过后地表建筑物完好无损。并在施工中解决了大断面隧道爆破施工导爆管雷管段数不能满足施工要求、分断面施工不能同时实施爆破作业，施工效率低下的问题，既保证了工程施工安全又满足了进度要求。
城市地鐵區間隧道爆破施工中麵臨的一箇重要問題就是降低爆破振動對臨近地錶建築物的影響。青島地鐵一期工程03號線03標段下穿建築物時，為瞭確保距隧道拱頂5～8 m的地錶建築物安全，採用瞭大中空孔直眼掏槽技術、一次起爆分部延時爆破、淺孔多眼等技術，將地錶建築物最大垂直振速控製在國標允許範圍之內，隧道通過後地錶建築物完好無損。併在施工中解決瞭大斷麵隧道爆破施工導爆管雷管段數不能滿足施工要求、分斷麵施工不能同時實施爆破作業，施工效率低下的問題，既保證瞭工程施工安全又滿足瞭進度要求。
성시지철구간수도폭파시공중면림적일개중요문제취시강저폭파진동대림근지표건축물적영향。청도지철일기공정03호선03표단하천건축물시，위료학보거수도공정5～8 m적지표건축물안전，채용료대중공공직안도조기술、일차기폭분부연시폭파、천공다안등기술，장지표건축물최대수직진속공제재국표윤허범위지내，수도통과후지표건축물완호무손。병재시공중해결료대단면수도폭파시공도폭관뢰관단수불능만족시공요구、분단면시공불능동시실시폭파작업，시공효솔저하적문제，기보증료공정시공안전우만족료진도요구。
To reduce the blasting vibration is important for blasting excavation in subway tun-nel construction. Take the 3rd bid section of Line 3 of Qingdao subway project for example,the distance between tunnel vault and ground is 5~8 m,in order to insure the safety of the upper buildings,technologies of parallel cut with big empty hole,one-time initiation and delay by parts,and multiply short holes were adopted in the project. The results show that the maximum value of vertical vibration limited in the criterion allowance,and the upper buildings was intact. Besides,problems of shock conducting tube detonator delay number difficulty to meet large cross-section tunnel blasting excavation requirements,multiple cross-section can’t initiation si-multaneous,and low construction efficiency were solved,which ensure the construction safety and schedule.
