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无砂真空预压吹填软土在国内造地工程中广泛应用,但实践表明传统固结解析解已不足以预测其加固性状和加固效果。从固结方程出发,在原有的等应变假设基础上,在定解条件中增加了吹填土特有的高度欠固结特性和无砂真空预压特别明显的真空度损耗,重新推导得到径向和竖向完全协调的新的等应变解析解——JJJ解答,以解决无砂真空预压吹填软土的排水固结设计理论问题。JJJ法作为固结方程的原生解答,兼容以往所有该类解析解的同时,增加了针对高度欠固结土类和排水板真空度损耗严重的排水固结问题的解决能力。经现场和试验验证,JJJ解析解可相当精确预测无砂真空预压吹填软土的复杂固结过程和加固土体超孔压分布和孔压消散分布,该解答同时也适用于堆载和真空预压的工况。
Sand-free vacuum pre-press dredging soft soil is widely used in domestic land-building projects, but practice shows that traditional consolidation analytical solutions are not enough to predict the reinforcement properties and reinforcement effects. Starting from the consolidation equation, based on the original equivalent strain assumption, the inherent underconsolidation characteristics of the dredged earth are increased and the vacuum loss of the sand-free vacuum preloading is obviously increased, and the radial loss And the new isotropic strain solution JJJ, which is fully coordinated with the vertical direction, to solve the theory of drainage consolidation of sand-filled vacuum pre-pressurized soft soil. The JJJ method, as the original solution to the consolidation equation, is compatible with all such analytic solutions in the past and at the same time increases the ability to solve the problem of drainage consolidation that is seriously detrimental to the vacuum of highly undesolved soil and drainage boards. The field and experimental verification show that the JJJ analytical solution can predict the complicated consolidation process of sand-filled vacuum preloading soft clay and the excess pore water pressure distribution and pore pressure dissipation distribution of the sand-free vacuum preloading hydraulically. The solution is also applicable to the pile loading and Vacuum preloading conditions.