摘要
广州市城区某地铁车站竖井工程,场区地层主要为微风化粗砂岩,受周边环境限制不能采用爆破开挖,竖井断面小无法使用大型施工设备,施工难度较大。经比选研究,制定组合式竖井非爆破开挖施工技术方案,通过水磨钻取芯形成临空面后,再用小体积大功率凿岩机器人破碎开挖,同时,采用小型设备配合施工因支护影响的开挖困难局部区域,解决了此类坚硬地质小断面超深竖井的开挖问题,提高了施工效率。
In the shaft engineering of a subway station of Guangzhou City,the stratum in the field zone is dominated by slightly weathered coarse sandstone.Due to the limitation of the surrounding environment,blasting excavation cannot be adopted.The shaft section is small and unable to support large construction equipment,so the construction is difficult.Through comparative study,the technical scheme of non-blasting excavation of combined shaft is formulated.After the formation of free surface by water mill drilling,the excavation is broken by small volume and high-power rock drilling robot.At the same time,small equipment is used to cooperate on the construction of local areas with excavation difficulties due to the influence of support,which solves the excavation problem of such hard geological small section and ultra-deep shaft and improves the construction efficiency.
作者
李东
LI Dong(The Second Engineering Company of CREGC,Chengdu 610091,China)
出处
《路基工程》
2025年第3期170-174,共5页
Subgrade Engineering
关键词
粗砂岩
竖井开挖
有限空间
临空面
交叉作业
智能建造
工效
经济性
coarse sandstone
shaft excavation
confined space
free surface
cross operation
intelligent construction
work efficiency
economy
