浅析螺杆桩在铁路路基工程施工中的应用

Application of Screw Pile in Railway Subgrade Engineering Construction

现浇螺杆桩作为一种新型的桩基,在铁路路基地基处理施工中得到广泛推广和应用。在桩基施工过程中,现浇螺杆桩采用桩机钻具旋转挤压土体并泵压混凝土成桩。与打入式预制桩相比较,其施工噪音低、无振动、对已施工的桩基无影响;与全螺旋钻、普通泥浆护壁成孔的灌注桩相比较,其无泥浆污染和弃土问题。本文结合新建吴忠至中卫铁路路基地基处理采用螺杆桩加固的试桩工程实践,将螺丝钉比钉子更加牢固的理论充分运用在工程实践中,使螺纹桩基在软基处理过程中的优点在工程实际中得以实现。

As a new type of pile foundation, cast-in-place screw pile has been widely popularized and applied in railway subgrade foundation treatment. In the process of pile foundation construction, the cast-in-place screw pile is formed by rotating the pile driver into the soil and then pump the concrete into the hole drilled to form a pile. Compared with driven precast pile, it is featured by low construction noise, no vibration and no influence on the constructed pile foundation;Compared with the cast-in-place pile with twist drill and regular mud retaining wall, it has no mud contamination and waste soil problems.Based on the test pile practice of screw pile in subgrade of the new Wuzhong-Zhongwei Intercity Railway, this paper fully applies the theory that screws are stronger than nails in engineering practice, and demonstrated the advantages of screw pile foundation in soft foundation treatment in engineering practice.