论文部分内容阅读
在离心模型试验中,模型的固结时间是原型固结时间的1/n2。根据此试验特征,可以在较短的时间内利用离心模型试验模拟深厚软基的长期固结沉降现象。基于离心模型试验原理,设计出不同的试验方案,对长板-短桩工法的加固机理进行了研究与探讨。试验结果表明,利用长板–短桩工法加固深厚软土地基是可行的,与单独使用水泥土搅拌桩复合地基相比,长板-短桩工法能够减小不均匀沉降,并在一定程度降低地基处理费用;与单独使用塑料排水板相比,长板–短桩工法不仅能够减小不均匀沉降量,而且能够减小高等级公路的工后沉降量。
In the centrifuge model test, the consolidation time of the model is 1 / n2 of the prototype consolidation time. According to the characteristics of this experiment, the centrifuge model test can be used to simulate the long-term consolidation settlement of deep soft ground in a relatively short period of time. Based on the principle of centrifugal model test, different test schemes are designed and the reinforcement mechanism of long slab-short pile method is studied and discussed. The test results show that it is feasible to reinforce the deep soft soil foundation by using the long slab-short pile method. Compared with the cement-soil mixing composite foundation alone, the long slab-short pile method can reduce the uneven settlement and reduce to a certain extent Compared with the plastic drainage board alone, the long board-short pile method can not only reduce the uneven settlement, but also reduce the post-construction settlement of the high-grade highway.