500彩票官网

  • <tr id='5cYeaB'><strong id='5cYeaB'></strong><small id='5cYeaB'></small><button id='5cYeaB'></button><li id='5cYeaB'><noscript id='5cYeaB'><big id='5cYeaB'></big><dt id='5cYeaB'></dt></noscript></li></tr><ol id='5cYeaB'><option id='5cYeaB'><table id='5cYeaB'><blockquote id='5cYeaB'><tbody id='5cYeaB'></tbody></blockquote></table></option></ol><u id='5cYeaB'></u><kbd id='5cYeaB'><kbd id='5cYeaB'></kbd></kbd>

    <code id='5cYeaB'><strong id='5cYeaB'></strong></code>

    <fieldset id='5cYeaB'></fieldset>
          <span id='5cYeaB'></span>

              <ins id='5cYeaB'></ins>
              <acronym id='5cYeaB'><em id='5cYeaB'></em><td id='5cYeaB'><div id='5cYeaB'></div></td></acronym><address id='5cYeaB'><big id='5cYeaB'><big id='5cYeaB'></big><legend id='5cYeaB'></legend></big></address>

              <i id='5cYeaB'><div id='5cYeaB'><ins id='5cYeaB'></ins></div></i>
              <i id='5cYeaB'></i>
            1. <dl id='5cYeaB'></dl>
              1. <blockquote id='5cYeaB'><q id='5cYeaB'><noscript id='5cYeaB'></noscript><dt id='5cYeaB'></dt></q></blockquote><noframes id='5cYeaB'><i id='5cYeaB'></i>

                LED照明知识KNOWLEDGE

                公路隧道通风照明设计规范(JTJ026.1-1999)

                隧道照明设计规范

                一、   入口段照明

                1、入口段ξ亮度可按下式计算:

                Lth = k*L20(S)

                式中  Lth――入口段亮度(cd/㎡);

                        K――入口段亮度折减系数,可按下表取值;

                L20(S)――洞外亮度(cd/㎡)。

                入口段亮度折减系数

                 

                设计交通→量N(辆/h)

                k

                行车速度vt(km/h)

                双车道单向交通

                双车道双向交通

                100

                80

                60

                40

                ≥2400

                ≥1300

                0.045

                0.035

                0.022

                0.012

                ≤700

                ≤360

                0.035

                0.025

                0.015

                0.01

                下一主题:照明基础培①训知识上一主题:LED隧道灯将大【规模应用于隧道基本照↑明

                在线客服

                • 在线客服:QQ
                • 020-34862828
                • 020-23882900
                • 周一至五9:00-17:00