tunnel clearance 中文意思是什麼
tunnel clearance
解釋
隧道凈空-
Calculation of the structure clearance for rectangular tunnel in urban rail transit
軌道交通明挖矩形隧道曲線地段建築限界的計算 -
Considering that the characteristics of our country ' s highway tunnels are always of long spans, tabular and of various geometry, by means of thorough analysis of the different problems existed in the design of support structures of the tunnels at present, this paper pays special attention to the two key problems, optimization method of form selection of structural section of the tunnel as well as the stability and bearing capacity of the support structures, in the design of the long and large tunnel on high - class highway, introduces the simplified complex - form optimum method in the structure optimization theory, discusses the optimum design model of lining section of highway tunnel with satisfying demands in building clearance, ventilation and load conditions, puts forward an optimization method of form selection of three different kinds of lining sectional forms ( i. e. single - center circle, three - center tabular circle and three - center sharp circle ), establishes a complete set of systematic optimum design the ory and method of long and large tunnel on high - class highway, develops the corresponding computer software used on the planned xuefeng mountain highway tunnel on shaoyang to huaihua expressway in hunan province for optimization of form selections of the structural sections, and obtains a series of relatively reasonable structural design parameters
本文針對我國公路隧道多為大跨度、扁平、幾何形狀呈多樣化的特點，通過深入分析目前隧道支護結構設計中存在的各種問題，抓住高等級公路長大隧道設計中隧道結構斷面的優化選型及隧道支護結構的穩定性與承載能力兩個核心問題，引入結構優化理論中的簡易復合形優化方法，深入探討了滿足建築限界、通風條件、受力狀態約束等條件下公路隧道襯砌斷面優化設計模型，提出了三種襯砌斷面形狀（單心圓、坦三心圓和尖三心圓）的優化選型方法，建立起一套完善的高等級公路長大隧道的系統優化設計理論與方法，並開發出相應的計算機程序，用於擬建的上海至瑞麗國道主幹線湖南省邵陽至懷化高速公路雪峰山長大高速公路隧道的結構斷面優化選型，得出了一系列較為合理的支護結構設計參數。 -
Some key technical problems about construction method, vehicle velocity and clearance of the tunnel scheme were discussed according to the geographical location, engineering geological conditions, request of the harbor entrance and shipping, localization of the tunnel and some principal technical criterions
根據泰州公路過江通道的地理位置、工程地質條件、港口航運要求、通道工程定位以及工程的主要技術標準等，對泰州公路過江隧道方案的隧道建設方法、隧道行車速度和建築限界等若干關鍵技術問題進行了分析論證。 -
Alignment location and clearance analysis method in using existing tunnel as urban mass transit
既有隧道改用城市軌道交通線路的線路設計與限界分析
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