排序方式: 共有191条查询结果,搜索用时 15 毫秒
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对不同地质段隧道开挖引起的地表沉降进行了分析对比,采用对初支背后土体注浆技术,对地表沉降进行了有效控制。 相似文献
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介绍了某隧道,在原施工地段存在衬砌背后空洞、开裂、渗漏水,衬砌厚度不足等病害及已施工拱部钢筋混凝土的被炸毁,洞口坍塌等复杂施工技术难题的治理方案。 相似文献
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The energy management may perform well under normal conditions, but may lead to poor behavior under abnormal situations. To tackle this problem, an optimal control strategy called rule-based equivalent fuel consumption minimization strategy (RECMS) is developed for a new complex hybrid electric vehicle (CHEV).It optimizes the energy efficiency and drive performance to cater for normal and power-loss operations of the tractive motor. Firstly, the strategy formulates a novel objective function based on the equivalent fuel concept.By accounting for the actual fuel cost, the equivalent fuel cost for the electric machines and virtual fuel cost for the drivability, the cost function is obtained. Furthermore, some penalty factors are presented to optimize the performance target. Finally, experiments for a practical CHEV are performed to validate a simulation model.Then simulations are carried out for both rule-based and RECMS. The results show that the optimal energy management is working well. 相似文献
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