针对新近吹填土淤泥地基处理中加固深度小,土体强度增强有限等问题,提出理论分析加固深度的新思路,即以传统的负压下砂井固结方程的解析解为基础,通过迭代法计算出土体中任意一点的固结度,换算出土体的加固深度,从而分析研究塑料排水板的通水量变化对加固深度的影响,得出加固深度的变化规律。结果表明:在真空预压处理新近吹填土淤泥地基时,排水板的通水量对地基的加固深度有显著的影响;在一定的固结时间(90 d)内,排水板之间的土体会形成5~10 m的硬壳层,通过延长加固时间可以增加硬壳层的厚度;当通水量减小超过60%时,延长固结时间对改善加固深度作用不大。因此,设计和施工中应充分考虑排水板的通水量影响。 In view of the problems such as the small reinforcement depth and the limited strength enhancement of the soil during the recent dredging treatment, a new idea of ​​theoretical analysis of the depth of reinforcement is proposed. That is, based on the analytical solution of the sand consolidation equation under negative pressure, Method to calculate the degree of consolidation at any point in the soil and calculate the reinforcement depth of the soil so as to analyze and study the influence of the change of water flow through the plastic drainage board on the depth of reinforcement and obtain the variation rule of the reinforcement depth. The results show that the drainage capacity of the drainage board has a significant effect on the depth of foundation reinforcement when vacuum preloading is used to treat the newly dredged silt foundation. During a certain consolidation time (90 days), the soil between the drainage board The thickness of the hard shell can be increased by extending the hardening time when the hard shell is 5 ~ 10 m thick. When the water flow is reduced by more than 60%, extending the consolidation time does not play a significant role in improving the depth of reinforcement. Therefore, the design and construction should take full account of the impact of the water through the drainage board.