论文部分内容阅读
真空和堆载联合预压法加固软弱地基具有固结时间短、土体侧向变形小、地基不会发生剪切破坏、加固地基土的承载力高等诸多优点。但作为真空堆载联合预压的外荷载(4~5m厚堆砂),由于一般未进行预处理,处于松散~稍密状态,水下部分液化,对于采用桩基的重要建筑设计要求首先采用预处理方法消除液化,表层液化松散砂如何处理影响工期和造价,该文通过某工程打入桩挤密(振密)进行消除饱和砂土液化试验并和强夯加固吹填砂进行对比分析,提出了直接利用打入桩挤密(振密)作用加固吹填松砂不需另外预处理的方法,对类似工程具有借鉴参考意义。
Vacuum and surcharge preloading consolidation method of weak foundation with consolidation time is short, soil lateral deformation is small, the foundation will not shear failure, the reinforced foundation soil bearing capacity and many other advantages. However, as an external load (4 ~ 5m thick sand pile) combined with vacuum preloading, it is loose and slightly dense because it is not pretreated in general and liquefied under water. The important architectural design requirements for pile foundation are firstly adopted Pretreatment method to eliminate liquefaction, surface liquefaction of loose sand how to deal with the impact of construction period and cost, through a project into the pile squeeze (vibration density) to eliminate saturated sand liquefaction test and dynamic compaction reinforcement sand packing comparisons, It is proposed that the method of directly using the effect of compaction piles (compacting) to reinforce puff-filled loose sand without additional pretreatment, which has reference significance for similar projects.