摘要
舟山与大陆联网工程螺头水道大跨越2基370 m高塔均位于海岛,基础坑底四侧采用掏挖嵌固形式,基础具有基坑深度大、掏挖净深大、开挖方量大等特点。为避免坑底掏挖对上部坑壁岩体产生破坏造成塌方,确保基坑成型质量及施工过程中的人身安全,结合基坑地质条件及成形特点,采用静态爆破掏挖施工工艺对这2基370 m高塔基础坑底进行施工。
The two 370-meter tower foundations of Luotou watercourse large crossing of Zhoushan-Mainland transmission project are located in sea islands. The four sides of foundation pits are excavated and embedded, and the foundations are characterized by deep foundation pit, large depth of excavation and large earthwork. In order to prevent landslide due to damage on rock of upper pit wall by excavation at the pit bottom and ensure forming quality of foundation pit and body safety during construction, the static blasting technology for exca- vation is adopted in construction of foundation pit bottom of two 370-meter towers by combining geological condition and forming character of foundation pit.
出处
《浙江电力》
2013年第10期77-80,共4页
Zhejiang Electric Power
基金
国家工程项目(浙发改能源[2007]564号)
关键词
输电线路
370
m高塔
基坑掏挖
静态爆破
施工工艺
transmission line
370-meter high tower
foundation pit excavation
static blasting
constructiontechnology
