A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Rapid excavation method for rock-anchored beam of underground powerhouse
The invention discloses a rapid excavation method for an underground powerhouse rock-anchored beam. The excavation of the underground powerhouse is sequentially divided into first layer excavation, small flat layer excavation, middle groove broaching, rock bench protection layer excavation and rock-anchored beam slope rock bench excavation according to the section. Comprising the steps that after a small flat layer above a rock bench is excavated to an upper straight wall, a buffer crack is formed between a rock bench protection layer rock mass and a middle broaching groove rock mass through presplitting blasting, then upper straight wall smooth blasting drilling, middle broaching groove bench blasting excavation and rock bench protection layer excavation are sequentially carried out, and finally inclined blasting hole drilling is carried out on an inclined rock bench. And smooth blasting is conducted on the upper straight wall and the slope blasting holes simultaneously, and slope rock bench excavation is completed. According to the method, a crack is formed through construction presplitting, the effects of shock absorption and energy buffering are achieved, the rock mass integrity of the bevel rock bench is protected, and the forming quality of the bevel rock bench is improved; protective layer smooth blasting one-time forming is adopted, and the quality is higher; holes are centrally drilled after small flat layer excavation is completed, the number of drilled holes is reduced, the construction period and cost are saved, and the environment is protected.
本发明公开了一种地下厂房岩锚梁快速开挖方法，将地下厂房开挖按断面依次分为首层开挖，小平层开挖，中部拉槽、岩台保护层、岩锚梁斜面岩台开挖；包括岩台上方小平层开挖至上直墙后，通过预裂爆破在岩台保护层岩体和中部拉槽岩体间形成缓冲裂缝，再依次进行上直墙光面爆破钻孔，中部拉槽梯段爆破开挖，进行岩台保护层开挖，最后进行斜面岩台斜向爆破孔钻孔，上直墙和斜面爆破孔同时光面爆破，完成斜面岩台开挖。本发明通过先进行施工预裂形成一道裂缝，起到减震和缓冲能量的作用，保护斜面岩台岩体完整性，提高斜面岩台成型质量；采用保护层光面爆破一次成型，质量更高；在小平层开挖完成后集中钻孔，减少钻孔数量，节约工期和成本，保护环境。
Rapid excavation method for rock-anchored beam of underground powerhouse
The invention discloses a rapid excavation method for an underground powerhouse rock-anchored beam. The excavation of the underground powerhouse is sequentially divided into first layer excavation, small flat layer excavation, middle groove broaching, rock bench protection layer excavation and rock-anchored beam slope rock bench excavation according to the section. Comprising the steps that after a small flat layer above a rock bench is excavated to an upper straight wall, a buffer crack is formed between a rock bench protection layer rock mass and a middle broaching groove rock mass through presplitting blasting, then upper straight wall smooth blasting drilling, middle broaching groove bench blasting excavation and rock bench protection layer excavation are sequentially carried out, and finally inclined blasting hole drilling is carried out on an inclined rock bench. And smooth blasting is conducted on the upper straight wall and the slope blasting holes simultaneously, and slope rock bench excavation is completed. According to the method, a crack is formed through construction presplitting, the effects of shock absorption and energy buffering are achieved, the rock mass integrity of the bevel rock bench is protected, and the forming quality of the bevel rock bench is improved; protective layer smooth blasting one-time forming is adopted, and the quality is higher; holes are centrally drilled after small flat layer excavation is completed, the number of drilled holes is reduced, the construction period and cost are saved, and the environment is protected.
本发明公开了一种地下厂房岩锚梁快速开挖方法，将地下厂房开挖按断面依次分为首层开挖，小平层开挖，中部拉槽、岩台保护层、岩锚梁斜面岩台开挖；包括岩台上方小平层开挖至上直墙后，通过预裂爆破在岩台保护层岩体和中部拉槽岩体间形成缓冲裂缝，再依次进行上直墙光面爆破钻孔，中部拉槽梯段爆破开挖，进行岩台保护层开挖，最后进行斜面岩台斜向爆破孔钻孔，上直墙和斜面爆破孔同时光面爆破，完成斜面岩台开挖。本发明通过先进行施工预裂形成一道裂缝，起到减震和缓冲能量的作用，保护斜面岩台岩体完整性，提高斜面岩台成型质量；采用保护层光面爆破一次成型，质量更高；在小平层开挖完成后集中钻孔，减少钻孔数量，节约工期和成本，保护环境。
Rapid excavation method for rock-anchored beam of underground powerhouse
一种地下厂房岩锚梁快速开挖方法
WANG QIANG (author) / LIU ZHENGENG (author) / DONG SHURONG (author) / ZHAO WEI (author) / ZHAO SHENGXIANG (author) / TIAN ZONGPENG (author) / LI YIXIN (author) / LIANG YUJIA (author) / YANG XIAOSHUANG (author) / WEN YOUCAI (author)
2023-08-18
Patent
Electronic Resource
Chinese
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