本文以桥梁仿真分析技术为主线，以整治效果为目标，以荷载试验和长期观测为检验手段，建立了既有钢桥裂纹安全检测评估系统。
Based upon finite element simulation analysis, load tests and long-term observation, a detection and evaluation system for old steel bridge safety was developed in this thesis.
介绍一例水压爆破拆除钢筋砼箱梁的爆破方案、参数设计、装药结构及安全防护，并对爆破效果进行分析。
In this paper, the blasting program, parameters, charging structure and safety defence of demolishing a case beam by hydraulic blasting is introduced, the blasting results are analyzed.
此外，简述了保护古城墙的安全措施，并对爆破效果做了简要分析。
In addition, the safety measures for protection of ancient city wall are outlined and the blasting results are briefly analyzed.
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