紧邻高铁全套管全回转钻孔桩施工技术

Construction Technology of Full-casing Full-rotary Bored Piles Close to High-speed Railway

高铁运营对线路精度要求极高,对周边环境变化极为敏感,邻近高铁施工安全风险极高,稍有不慎就将酿成大祸。本文以南京宁和城际轨道交通工程紧邻高铁桥梁钻孔桩施工为例,介绍全套管全回转钻孔桩施工技术。该技术具有适用地质条件广、施工效率高、施工质量有保障、对周边环境及高铁运营影响小等优点,极好地保障了施工期间高铁运营安全和施工安全。

The operation of the high-speed railway requires its high accuracy and it is extremely sensitive to the changes of the surrounding environment. The construction safety risk is very high for nearby high-speed railway construction, and the slightest mistake will lead to disaster. In this paper, the construction of bored piles of Nanjing Ninghe intereity rail transit project adjacent to high-speed railway bridges was taken as an example, the technique for construction of full-casing full- rotary bored piles was introduced. This kind of technique has many advantages such as wider applicable conditions, higher construction efficiency, more guaranteed construction quality, less effect on the surrounding environment and high-speed railway, which has excellently protected the high-speed railway operation and construction safety during the construction.