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在水利水电土建工程施工中经常要进行岩石开挖施工,如水工建筑物岩石基础开挖和水工建筑物地下工程开挖,施工中不可避免地会产生各种超挖。产生超挖的原因一般可以分为两种:(1)施工技术规范规定的允许超挖及必要的施工附加量。(2)地质条件不良造成的超挖及施工错误造成的超挖。因地质条件不良造成的超挖按规定应现场商定签证按实际发生量计;因施工错误造成的超挖应由施工单位负责。
In the construction of water conservancy and hydropower civil engineering often rock excavation construction, such as hydraulic rock excavation of buildings and underground excavation of hydraulic structures, construction will inevitably have a variety of over-excavation. The reasons for over-excavation can generally be divided into two types: (1) The construction of technical specifications to allow over-excavation and the necessary additional amount of construction. (2) over-excavation caused by poor geological conditions and over-excavation caused by construction mistakes. Due to poor geological conditions caused by over-excavation required by the scene should be agreed on-site visas according to the actual amount; due to construction over-excavation should be responsible for the construction unit.