非对称土压条件下地铁深基坑支护设计方法研究

山地条件下开挖基坑,不仅要克服自身地质条件的复杂性,而且还要考虑由于地形起伏导致的非对称土压问题。为此,以深圳地铁十号线凉帽山车辆段出入线大明挖工程为例,研究了该工程“锚撑结合、主次坑联合支护、非对称土压反压回填”的设计方法。通过项目的顺利推进验证了该设计方法的合理性。

Study on Design Method of Deep Foundation Pit Supporting of Metro under the Condition of Asymmetric Earth Pressure

The excavation of the deep foundation pit under the mountainous condition not only needs to overcome the complexity of its geological conditions but also emphasize the asymmetric earth pressure problems caused by the terrain fluctuation. Taking the Daming excavation project of Shenzhen Metro Line No.10 Liangmao Mountain vehicle segment as an example, this paper analyzes the design method of anchor bracing, primary and secondary pit combined support, asymmetric earth pressure back-pressure backfill. The rationality of the design method is validated by the smooth progress of the project, which is worthy of reference in the similar engineering design.