问题 单项选择题

某单层单跨工业厂房建于正常固结的黏性土地基上,跨度27m,长度84m,采用柱下钢筋混凝土独立基础。厂房基础完工后,室内外均进行填土:厂房投入使用后,室内地面局部范围有大面积堆载。堆载宽度6.8m,堆载的纵向长度40m。具体的厂房基础及地基情况、地面荷载大小等如题图所示。


条件同上题。若在使用过程中允许调整该厂房的吊车轨道,试问,由地面荷载引起柱l基础内侧边缘中点的地基附加沉降允许值[sg’](mm)最接近于下列( )项数值。

A.40
B.58
C.72
D.85

答案

参考答案:C

解析:根据《地基基础》表7.5.4,a=40m,b=3.4m,得

阅读理解

If you want to keep healthy, you should have good habits. What is a habit? It is something we do very often. We don’t even think when we do it. It has become a part of our lives.

“Early to bed, early to rise makes a man healthy, wealthy and wise.” This is an old English saying. Do you know what it means? It means that we must go to bed early at night and get up early in the morning. If we do, we shall be healthy, rich and clever.

Is this true? Perhaps it is. We know the body must have enough sleep. Boys and girls need eight or nine hours’ sleep every day.

Some people go to bed late at night and get up late in the morning. This is a very bad habit. Then you will not think or do your work well. Of course, you can’t be healthy, wealthy or wise.

When we get up early in the morning, we can go out and do morning exercises. Exercise means doing things with the body. Walking, running jumping, swimming, and playing ball games are all exercise. If we don’t exercise, our body will become weak.

Exercise helps the blood (血液) to move around inside our body. Blood takes food to all parts of our body.

Our body also needs air to breathe. Without air, we will die. We must have lots of clean fresh air if we want to be healthy. That is why many people like to go out to do morning exercise.

1 From the passage we know that it is good for our health to ____ .

A. eat a lot         B. go to bed early   C. get up late      D. go to bed late

2 How long should young boys and girls need to sleep a day?

A. More than ten hours                B. Over eleven hours.

C. Less than seven hours.             D. Eight hours or so.

3 If we want to keep healthy, we must ____ .

A. eat more food                         B. sleep more     C. get up late D. take enough exercise

4 Which of the following habits is NOT GOOD?

A. Don’t go to bed until twelve o’clock..

B. Take a walk after supper.

C. Run in the open air early in the morning.

D. Climb hills for half an hour early in the morning.

5 Which sport is NOT mentioned in the passage?

A. Jumping.       B. Swimming.    C. Riding.          D. Running.

单项选择题