临近既有铁路基坑支护方案的研究

Research on foundation supporting scheme nearing existing railway

以某高速铁路基坑支护为研究对象,进行了单支撑方案下的支护设计;采用PLAXIS有限元软件,对比分析了有无渗透条件下的沉降量,结果表明,临近既有线进行基坑开挖时,不得在临近线路侧进行降水作业;桩长超过9 m后,就能使钢轨的水平值在允许范围内。

Taking the highway railway foundation support as the research object, the paper carries out support design of single bearing scheme, and comparatively analyzes the settlement without penetration by using PLAXIS finite element software. Results show that： while the foundation excavation is nearing existing railway, dewatering operation has to be clone nearing the existing railway, if the pile length is over 9 m, the rail level value will be within permitted.