石家庄铁路职业技术学院学报
石傢莊鐵路職業技術學院學報
석가장철로직업기술학원학보
Journal of Shijiazhuang Institute of Railway Technology
2015年
3期
32-36
,共5页
既有线%路堑开挖%预裂爆破%振动监测
既有線%路塹開挖%預裂爆破%振動鑑測
기유선%로참개알%예렬폭파%진동감측
existing line%cutting excavation%presplit blasting%vibration monitoring
京沪高速铁路DK453＋030～DK453＋940段，全长910 m，为全断面开挖路堑，岩石为Ⅳ、Ⅴ级花岗片麻岩，设计爆破石方量为36.07万方。该段爆破环境复杂，爆破区距离村庄最近点约100 m，距离京沪正线不足40 m，既要做到不扰民，更要保证京沪线的正常运营，是该工程的难点。综合考虑工程特点，决定采用预裂爆破的方式进行开挖。通过精密设计和精细化施工，取得了理想的爆破效果，同时对爆破振动进行监测和分析，得到该地质条件下预裂爆破的衰减规律，具有类似工程施工的参考价值。
京滬高速鐵路DK453＋030～DK453＋940段，全長910 m，為全斷麵開挖路塹，巖石為Ⅳ、Ⅴ級花崗片痳巖，設計爆破石方量為36.07萬方。該段爆破環境複雜，爆破區距離村莊最近點約100 m，距離京滬正線不足40 m，既要做到不擾民，更要保證京滬線的正常運營，是該工程的難點。綜閤攷慮工程特點，決定採用預裂爆破的方式進行開挖。通過精密設計和精細化施工，取得瞭理想的爆破效果，同時對爆破振動進行鑑測和分析，得到該地質條件下預裂爆破的衰減規律，具有類似工程施工的參攷價值。
경호고속철로DK453＋030～DK453＋940단，전장910 m，위전단면개알로참，암석위Ⅳ、Ⅴ급화강편마암，설계폭파석방량위36.07만방。해단폭파배경복잡，폭파구거리촌장최근점약100 m，거리경호정선불족40 m，기요주도불우민，경요보증경호선적정상운영，시해공정적난점。종합고필공정특점，결정채용예렬폭파적방식진행개알。통과정밀설계화정세화시공，취득료이상적폭파효과，동시대폭파진동진행감측화분석，득도해지질조건하예렬폭파적쇠감규률，구유유사공정시공적삼고개치。
The section of DK453+030~DK453+940 in Beijing-Shanghai express railway is 910 meters long. It’s full-face cutting and the stone belongs to IV- or V-grade granite gneiss. It has been planned that about 360.7 thousand cubic meters of stone would be blasted off. The blasting condition of this section is rather complex and the smallest distance between the blasting point and the village is only about 100 m and that from the Beijing-Shanghai main line is less than 40m. So it is a problem to guarantee the routine construction of this project while the nearby villagers remain undisturbed. Considering the real situation of the project, the approach of presplit blasting was applied. After careful design and accurate construction, the blasting effect was ideal. Through the monitoring and analysis of the blasting vibration, the regular reduction pattern of presplit blasting in this geologic condition was obtained, which would be referred to by projects alike.
