地下水均衡多时段调节计算方法研究

从农业生产实际出发，指出常用的多年均衡法存在计算时距太长和起调埋深的确定不准确等不足，提出了综合考虑满足作物生长对排渍要求的最小埋深和沟洫排泄作用下的调蓄埋深的改进方法衣其数学模型，并用实例说明两种方法计算结果的差异。     

不同间作方式对玉米产量的影响

运用随机区组试验对玉米与大豆不同间作方式进行研究,以期获得不同间作方式对玉米产量影响最大的间作方式的表现.结果表明,玉米间大豆24的间作方式因间作比例适宜对自然资源利用较好,两者间的负作用小,其产量潜力得到了充分发挥,经济效益最高,总产值为581元·667m-2;24的间作方式分别比12、32的总产值高出91.9元、33.4元;12、32的大豆产量明显低于24.因此在玉米与大豆的间作中,适宜的间作方式是提高总产量和效益的技术关键.     

服役公路隧道结构模糊物元可靠性评价

服役公路隧道可靠性是隧道结构加固、维修的基础.为了解服役公路隧道结构可靠性,根据模糊物元分析法原理,提出基于熵权的模糊物元分析方法.把隧道结构的状态级别作为物元的事物,用村砌裂缝、衬砌厚度、混凝土强度、衬砌背后空洞、渗漏水等评价指标及其相应的模糊量值构造复合模糊物元.通过关联度计算,得到服役公路隧道可靠性评价结果.并将分析模型应用到某公路隧道结构可靠性评价,取得了良好的效果,分析结果比传统的定性方法更为准确.为有针对性的制定合理的隧道养护对策和措施,及时进行隧道维修与加固提供科学的决策依据;也为进一步深入开展服役公路隧道可靠性研究提供借鉴和参考.

Abstract：

Reliability analysis is the premise for reinforcing and maintaining existing highway tunnels.In order to understand the structure reliability of existing highway tunnels, an entropy weight-based fuzzy matter-element evaluation method was developed according to the fuzzy matter-element analysis method.First, the grade of the condition of tunnel structure was taken as the object of matter element and the com-posite fuzzy matter-elements were constructed considering such factors and their evaluation indexes as cracks of concrete lining, lining thickness, concrete strength, cavities behind the lining and water leakage.Then, the reliability evaluation results of existing tunnel structure were obtained by relevancy calculation.Desirable results, which were better than those obtained with the traditional quantitative methods, were a-chieved when this fuzzy matter-element evaluation model was applied to reliability evaluation of one high-way tunnel structure.     

高速公路隧道路面抗滑可靠性分析

行车环境的特殊性和路面抗滑性能耐久性是影响高速公路隧道交通安全的重要因素.为了解路面抗滑性能现状,以某高速公路隧道路面为研究对象,实测道路交通量和隧道路面不同位置平均构造深度MTD和摆值BPN.预估了隧道路面抗滑性能的剩余寿命,并用模糊聚类分析方法对数据进行处理,得到隧道不同路段路面抗滑水平聚类结果,分析结果与实际状况吻合.为制定路面养护对策、进行合理的车速管制提供了科学依据,减少或避免交通事故的发生,也为高速公路隧道路面整体可靠性评价提供参考.

Abstract：

The particularity of driving environment and durability of pavement skid-resistant performance are important factors which influence traffic safety in expressway tunnels. In order to learn about the pres-ent situation of pavement skid-resistant performance, mean pavement texture depth (MTD) and British pendulum number (BPN) of one expressway tunnel pavement were measured in different places of this tun-nel. Residual life of its pavement skid-resistant performance was predicted based on surveyed traffic vol-ume. Fuzzy cluster was used to analyze pavement skid-resistant performance. The analysis result showed that the cluster result was in good agreement with the actual situation. This paper provides scientific basis to make reasonable pavement maintenance countermeasures and to define proper speed limitation in tun-nels, which will lead to a decrease in or avoidance of traffic accidents. Besides, this paper can also serve as a reference to the whole structure reliability analysis in expressway tunnels.