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福银高速公路宁夏境同心～固原段路线在K126+750～K128+950经过当地称为“塌山”的地段,是1920年12月16日宁夏海原8.5级大地震造成的破坏区。区域内地势起伏不平,地表松疏,地形紊乱,公路路基两侧的排水十分困难,是重点地质处治段落。经过多方案比较,设计采用碎石挤密桩对液化粉土地基进行处理。施工过程显示该方案技术先进、经济合理;该段高速公路已建成通车,状况稳定,采用碎石挤密桩处理液化粉土地基取得了显著工程效果。
Fuyin Expressway in Ningxia concentric ~ Guyuan section of the route K126 +750 ~ K128 + 950 through the local known as “Hill”, is December 16, 1920 Ningxia Haiyuan 8.5 earthquake caused the destruction of the area. Uneven terrain in the region, the surface is loose, terrain disorder, drainage on both sides of highway subgrade is very difficult, is the focus of geological treatment. After many schemes are compared, the gravel compaction pile is designed to treat liquefied silt foundation. The construction process shows that the scheme has advanced technology and economic rationality; the section of expressway has been completed and opened to traffic and has been in stable condition. Significant engineering effects have been achieved in the treatment of liquefiable silt foundation with gravel compaction piles.