问题 问答题 案例分析题

“悬臂施工、梁段预制、长线法施工工序”案例分析与答案解析题

背景材料:

某大桥为(50+4×80+50)m连续梁桥,主梁为双箱单室箱形结构,混凝土标号为50号,采用悬臂拼装施工工艺。梁段采用长线法预制,缆索吊装就位。

问题:

简要叙述长线法施工工序。

答案

参考答案:

长线法施工工序:预制场、存梁区布置→梁段浇筑台座准备→梁段浇筑→梁段吊运存放、修整→粱段外运→梁段吊拼。

考点解读:悬拼法施工方法

1.梁段预制方法分长线法及短线法。

2.长线法,组成梁体的所有梁段均在固定台座上的活动模板内浇筑且相邻段的拼合面应相互贴合浇筑,缝面浇筑前涂抹隔离剂,以利脱模。

优点是由于台座固定可靠,成桥后梁体线性较好,缺点是占地较大,地基要求坚实,混凝土的浇筑和养护移动分散。

3.短线法,梁段在固定台座能纵移的模内浇筑。待浇梁段一端设固定模架,另一端为已浇梁段(配筑梁段),浇毕达到强度后运出原配筑梁段,达到要求强度梁段为下待浇梁段配筑,如此周而复始,台座仅需3个梁段长。优点是场地较小,浇筑模板及设备基本不需要移机,可调的底、侧模便于平竖曲线梁段的预制,缺点是精度要求高,施工要求严,施工周期相对较长。

4.长线法施工工序:

预制场→存梁区布置→梁段浇筑台座准备→梁段浇筑→梁段吊运存放、修整→梁段外运→梁段吊拼。

完形填空

根据短文内容,从短文后的选项中选出能填入空白处的最佳选项,并在答题卡上将该项涂黑。选项中有两项为多余选项。(E="AB," F="AC," G=AD)

The Internet has opened up a whole new online world for us to meet, chat and go where we’ve never been before.

But just as in face to face communication, there are some rules of behavior that should be followed when on line. 小题1:  Imagine how you’d feel if you were in the other person’s shoes.

For anything you’re about to send: ask yourself, “Would I say this to the person’s face?” If the answer is no, rewrite and reread.  小题2: 

If someone in the chat room is rude to you, your instinct (本能) is to fire back in the same manner. But try not to do so. 小题3:  If it was caused by a disagreement with another member, try to fix the situation by politely discussing it. Remember to respect the beliefs and opinions of others in the chat room.

小题4:  Offer advice when asked by newcomers, as they may not be sure what to do or how to communicate. When someone makes a mistake, whether it’s a stupid question or an unnecessarily long answer, be kind about it. If it’s a small mistake, you may not need to say anything. Even if you feel strongly about it, think twice before saying anything. Having good manners doesn’t give you right to correct everyone else. 小题5: At the same time, if you find you are wrong, be sure to correct yourself and apologize to those that you have offended.

It is not polite to ask others personal questions such as their age, sex and marital status. Unless you know the person very well, and you are both comfortable with sharing personal information, don’t ask such questions.

A.It’s natural that there some people who speak rudely or make mistakes online.

B.Repeat the process till you feel sure that you’d feel comfortable saying the words to the person’s face.

C.Everyone was new to the network once.

D.The basic rule is simple: treat others in the same way you would want to be treated.E. When you send short messages to a person online, you must say something beautiful to hear.

F. You should either ignore the person, or use your chat software to block their messages.

G. If you do decide to tell someone about a mistake, point it out politely.

单项选择题