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中文摘要：
旧路改建高速公路遇到的最主要的问题是地基的不均匀沉降。数值分析表明，对新的天然地基进行处理是解决这一问题的关键。强夯是加固地基的一种有效措施，为了对强夯工艺参数进行优化研究，对夯锤冲击地面过程中产生的动孔隙水压力、动土应力以及夯后超静孔隙水压力的消散过程进行了跟踪测试与分析。结果表明，对以风化料为主的地基，最大夯击数不宜超过4击，而且铺底夯完成2d后就可进行满夯。
英文摘要：
Differential settlement of the subgrade is the main problem encoutered in the reconstruction of old road to expressway. Numerical analysis indicates that the treatment to new nature ground is the key to decreasing the differential settlement. Dynamic compaction is an effective method of improving ground. In order to optimize its construction parameters, dynamic pore water pressure and dynamic soil stress rising during the dynamic compaction; and the dissipation of excess pore water pressure are measured and analyzed. For weathered soil subgrade, test results show that the maximum tamping number shouldn＇t exceed 4 and ironing tamping can be carried out just two days after the major tamping.
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