Research results: Through systematically analyzing and comparing, the general measures of culvert foundation improvement are drainage and consolidation method and complex foundation method.
研究结果：通过系统的分析比较，涵洞地基加固处理常用两类方法：一是排水固结法，二是复合地基法。
By comparing experimental results with prediction data, they fit well, which provides a new method to research open-die cold extrusion. and to create expert system of its technological design.
通过实验结果与预测结果的比较，二者吻合良好，为深入研究开式冷挤压工艺，建立开式冷挤压工艺设计专家系统提供了新的思路。
The main research method includes data method, questionnaire experiment comparing method, statistical method, and analysing method, etc.
主要的研究方法有文献资料法、问卷调查法、实验对比法、数理统计法、对比分析法等。
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