问题 问答题


[背景材料]
某建筑工程,建筑面积108000m2,现浇剪力墙结构,地下3层,地上50层。基础埋深14.4mm,底板厚3m,底板混凝土强度等级为C35。
底板钢筋施工时,板厚1.5m处的HRB335级直径16mm钢筋,施工单位征得监理单位和建设单位同意后,用HPB235钢筋直径10mm的钢筋进行代换。
施工单位选定了某商品混凝土搅拌站,由该项目部为其制订了底板混凝土施工方案。该方案采用溜槽施工,分两层浇筑,每层厚度1.5m。
底板混凝土浇筑时当地最高大气温度38℃,混凝土最高入模温度40℃。
浇注完成12h后采用覆盖一层塑料膜和一层保温岩棉养护7d。
测温记录显示:混凝土内部最高温度75℃,其表面最高温度45℃。
监理工程师检查发现底板表面混凝土有裂缝,经钻芯取样检查,取样样品均有贯通裂缝。
[问题]

该基础底板钢筋代换是否合理说明理由。

答案

参考答案:

解析:该基础底板钢筋代换不合理。因为钢筋代换时,应征得设计单位的同意,对于底板这种重要受力构件,不宜用HPB235代换HRB335。

阅读理解

阅读理解。

     My name is Dave. There are four people in my family. My father is a policeman. His work is kind

of dangerous. He's very busy. He often has meals  outside (外面). Sometimes we can't see him all day.

But I love him very much. My mother is a bank clerk, but she wants to be a   reporter. She says her job

is boring and being a reporter is interesting, because she can meet many interesting people. My brother is

a waiter. He likes his work, because he thinks he can meet many new friends when he works. I'm a

middle school student. I study hard because I want to be a teacher. I think it’s not difficult for me.

1. Dave's father is ____.          

A. a policeman              

B. a reporter          

C. a bank clerk             

D. a teacher

2. Dave's mother wants to be ____.          

A. a policeman              

B. a reporter          

C. a bank clerk              

D. a teacher

3. Why does his brother like his job?          

A. Because the job is interesting.          

B. Because he can meet many interesting people.          

C. Because he can meet many new friends.         

D. Because he can catch (抓住) thieves.

4. Whose (谁的) work is  dangerous?          

A. Father's.                  

B. Mother's.  

C. Brother's.                 

D. Dave's.

5. The passage mainly talks about (a) ____.          

A. story                      

B. news         

C. play                       

D. jobs

单项选择题