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我国测定弯沉时采用的标准轴载BZZ-100的有关参数是()。

发布日期:2021-03-23

我国测定弯沉时采用的标准轴载BZZ-100的有关参数是()。
A

p=0.5MPa

B

p=0.7MPa

C

d=21.5cm

D

d=19.5cm

试题解析

标准轴载

路面设计时使用累计当量轴次的概念。公路上行驶的车辆种类繁杂,不同车型和不同作用次数对路面影响不同,为方便路面设计,需将不同车型组合而成的混合交通量换算成某种统一轴载的当量轴次。这种统一的轴载,称为标准轴载。

中文名
标准轴载
标准轴载
100
接地压强
0.70
外文名
standard axle load
两轮中心距
1.5d

弯沉

弯沉一般指路基或路面表面在规定标准车的荷载作用下轮隙位置产生的百总垂直变形值(总弯沉)或垂直回弹变形值(回弹弯沉),单位为0.01mm。回弹弯沉指的是路基或路面在规定荷载作用下产生垂直变形,卸载后能恢复的那一部分变形。路面回弹弯沉量,不仅反映了路基路面结构的整体刚度和强度,而且还与路面的使用状态存在一定的内在联系。通常回弹弯沉值越大,路面结构的塑性变形也越大(刚度差),同时抗疲劳性能也差,难以承受重交通量;反之,则路面结构的抗疲劳性能好,并能承受较重的交通量。此外,回弹弯沉还易于测试,因此我国现行的沥青路面设计方法,采用设计弯沉为路面整体刚度的设计指标。并以标准轴载作用下,路表回弹弯沉值Ls不超过满足路面使用状态和设计使用年限要求的路面设计弯沉值Ld作为设计标准,即:Ls小于等于Ld。它作为工程竣工后的一项重要权检测指标,反映了路面的整体强度质量。因此,正确测试路面弯沉,对评价路面强度有很

中文名
弯沉
计算公式
Ld=600(Ne^-0.2)*AC*AS* AB(等级AC,轴次Ne,面、基层系数As、Ab)
读音
wān chén
外文名
deflection
分为
容许弯沉、设计弯沉和计算弯沉
应用
交通运输

我国

《我国》是一首麦家瑜演唱的歌曲,由林夕作词、杨淽作曲,收录于《More Than Love》专辑中。

中文名
我国
歌曲原唱
麦家瑜
谱曲
杨淽
所属专辑
More Than Love
填词
林夕

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