(1.College of Water Conservancy and Civil Engineering,Xinjiang Agricultural University,Urumqi 830052,China;2.Gezhouba Xinjiang Engineering Co.,LTD,Urumqi 830000,China)
Abstract:The Bulunkou-Konggur hydropower station is located in an area with high altitude and terrestrial stress,and its inclined diversion shaft has one of the biggest inclination angles among all the shafts already constructed and under construction.Therefore,it has many unsafe factors during the construction period.In the construction of pilot shaft,the excavation method of full-section borehole blasting from bottom to top-bad rock displacement with gravity is used,which ensures the security,quality and progress of the construction.The unit price analysis can provide the detailed data to control the construction consumption for these types of projects scientifically and accurately.The results showed that this method has several advantages,such as low cost and simple equipments and technology,thus it has potential to be popularized.
Key words:high altitude area;high field stress area;deep inclined shaft;excavation of pilot shaft;unit price analysis
① 全斷面鉆孔爆破-自重溜渣的施工導(dǎo)井開(kāi)挖單價(jià)分析,得到了斜井石方開(kāi)挖――鉆爆自重溜渣法開(kāi)挖導(dǎo)井的預(yù)算消耗定額,為今后此類(lèi)工程單價(jià)的分析確定了計(jì)算參考依據(jù)。
② 經(jīng)單價(jià)分析,證明了全斷面鉆孔爆破-自重溜渣的施工導(dǎo)井開(kāi)挖方法具有施工成本低、設(shè)備和技術(shù)簡(jiǎn)單等優(yōu)點(diǎn),具有很好的經(jīng)濟(jì)性,有推廣和應(yīng)用的價(jià)值。
③ 本單價(jià)分析是針對(duì)高海拔、高地應(yīng)力區(qū)深斜井(井斜為60°,井斜長(zhǎng)為80~300 m,圍巖為三類(lèi))的施工上導(dǎo)井鉆爆自重溜渣法而做的,對(duì)類(lèi)似且施工條件有變化的工程,可根據(jù)具體情況做適當(dāng)?shù)恼{(diào)整。
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