既有铁路路基边开挖桥梁基坑的防护技术

Bridge Pit Wall Protection Technique Near Existing Railway Embankment

在既有铁路路基边开挖桥梁承台基坑，为防止坑壁坍蹋，保证铁路正常行车，经方案比选，采用在铁路路基两侧边坡施设双排旋喷桩并内插钢筋在桩顶相互对拉的防护技术，取得较好的效果。

In order to prevent the side slope of existing railway embankment from collapse during the construction of pit excavation near the railway, this paper discusses three improvement techniques, and decides to use double jet grouting pile on the two sides of the embankment. The piles are pulled each other at their tops. This technique is of good results in practice.