饱和软粘土动力固结机理及实用工艺研究  

Research on Mechanism and Practical Technology of Dynamic Consolidation of Soft Clay Foundation

作　　者：孟庆山[1] 汪稔[1] 

机构地区：[1]中国科学院武汉岩土力学研究所岩土力学重点实验室,湖北武汉430071

出　　处：《长江科学院院报》2004年第5期32-34,40,共4页Journal of Changjiang River Scientific Research Institute

基　　金：国家重点基础研究发展规划(973)项目(2002CB412704);中国科学院武汉岩土力学研究所博士科研启动基金资助项目(Q220302).

摘　　要：传统的强夯法加固地基的顺序是由深部到浅部,动力排水固结法加固饱和软土地基的顺序是由浅部向深部,逐渐增大能量,逐层向下加固,而且动力排水固结法加固上层填土是直接的,而加固下层饱和软粘土是间接的。通过对动力排水固结法加固饱和软基的施工工艺的探讨,认识到确定饱和冲击能量、最佳冲击击数、合理的冲击遍数以及两遍夯击的间隔时间,可以有效避免冲击能量的浪费,杜绝实际工程中常见的"橡皮土"现象的产生。为优化施工设计和现场指导施工提供了技术支持。The sequence of conventional dynamic consolidation treatment foundation is from deep to shallow, but that of dynamic consolidation by drainage method is developed from shallow to deep with the impact energy increasing step by step. The surface soil of foundation is consolidated directly, and the deep、seated soft clay is consolidated indirectly by impact loading of heavy hammer. Based on the analysis on technical process of treating saturated soft clay foundation with dynamic consolidation by drainage method, the impact energy waste could be avoided by rationally ascertaining saturated impact energy, the appropriate impact number, the optimal impact loading times, the order of applied impact energy and the interval between two impacts etc.. And thus the phenomenon of 'rubber soil' in practical engineering would not occur. The study results might provide technological support for detailed design and guiding construction in site.

关 键 词：动力排水固结法 软土地基 固结机理 施工工艺 

分 类 号：TU472[建筑科学—结构工程]