新疆布尔津山口水利枢纽拱坝高边坡开挖及支护技术

High slope excavation and supporting techniques for construction of arch dam of Shankou Water Conrol Project in Bu' erjin of Xinjiang

新疆布尔津山口水利枢纽坝址区两岸地形陡峭,工程地质条件比较复杂,节理裂隙发育,边坡稳定性差,边坡开挖高差大,且同时紧临与引水系统和厂房标施工工作面,交叉作业问题突出。施工中采用了自上而下分台阶开挖,边坡加固以锚筋桩、预应力锚索为主,喷锚等施工技术,确保了开挖边坡稳定和施工安全。

As the topographies of both the banks of the site for Shankou Water Control Project in Bu＇ erjin of Xinjiang are quite precipitous with a complicated geological condition of developed joint fissures and poor slope stability, the height difference of the excavations of both the slopes are large, while the excavations are close to the working faces of the constructions of the water delivery system and the powerhouse with protrudent problems from the corssing operations of construction. During the construction the technologies of top-down excavation in steps, slope strengthening mainly with anchor-bar piles, prestressed anchor cable as well as well shotcrete rockbolt, etc. are adopted, and then the stabilities of the excavating slopes and the construction safety are ensured.