桥梁大型深基坑无支护开挖施工方法研究

Study on the Non Support Excavation Method of Bridge Deep Foundation Pit

针对无水、土层结构稳定的桥梁深基坑,从施工工艺流程、施工操作要点,施工方法的特点及适用范围、经济效益分析方面详细介绍了一种深基坑无支护的施工方法。该方法能够很好地合理利用开挖坡度,使得工程量达到合适的平衡点。极大地加快了工程进度,缩短了施工工期,同时还节约了支护材料和费用。此外,该方法表现出了一定的环保和节能效益,在应用区域能够起到良好的社会效益。希望该方法能够得到广泛的应用。

For the anhydrous ridge deep foundation pit with stable soil structure, this paper introduces the deep excavation without support construction method from the construction process, construction points, construction method, the scope of application and the economic benefit analysis in detail. This is a good method to make reasonable use of the excavation slope, make the engineering quantity achieve the right balance. This method greatly accelerates the progress of the project, shortens the construction period, and also saves the supporting material and cost. In addition, this method shows the environmental protection and energy saving benefit and plays a good social benefit in the applied region. This paper hopes the method can be widely applied.