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山西省试验震密桩加固松散饱和可液化粉细砂地基,防止在8°地震烈度时产生地基液化,取得了显著成果。震密桩对砂土地基的加密,除在成桩孔时局部产生的挤密作用外,主要利用震动沉桩时的上下震动力震密砂土,使地基下沉而取得。由于震密桩桩距大,桩孔内灌注的材料少,它和挤密桩比较(挤密桩桩距小,灌注的材料多,地基靠灌注材料加密),可节约大量灌注材料,因而可用来替代挤密桩加固可液化砂士地基。
The Shanxi test-striking pile reinforced loosely-saturated liquefiable fine sand foundation to prevent ground liquefaction when the 8° earthquake intensity occurred, and achieved remarkable results. In addition to the compaction effect generated by the compact piles on the sand foundation, which is generated locally when the pile holes are formed, the vibrations are mainly used to shake up and down the sand and make the foundation sink. Due to the large distance between the compact piles and the small amount of material poured in the pile hole, it is compared with the compaction piles (small compaction piles, more perfusion materials, and the foundation is encrypted by pouring material), which can save a lot of infusion materials, so it can be used Instead of compaction piles to reinforce liquefiable sand foundation.