问题 问答题

某厂房柱基础如图所示,b×1=2×3m,受力层范围内有淤泥质土层③,该层修正后的地基承载力特征值为135kPa,荷载标准组合时基底平均压力pk=202kPa,试验算淤泥质土层顶面处承载力是否满足要求。

答案

参考答案:

淤泥质土顶面处的自重压力值

pcz=γ1h12h2=18×20+19×0.5+9×2.5=36+9.5+22.5=68kPa

矩形基础淤泥质土顶面处的附加压力值

式中:Pc——基础底面处土的自重压力值。

pc=18×2.0=36kPa

z=3.0m,z/b=3/2=15,Es1/Es2=10/2=5MPa,则

θ=25°

pz+pcz=35.8+68=103.8kPa<135kPa,满足。

问答题
阅读理解

阅读理解。

     One day when he was crossing the road, Tom was hit by a car. He fell down and broke his arm.

     An ambulance (救护车) soon arrived and took Tom to a hospital. A doctor operated on (动手术)

his arm and put the arm in a plaster cast(上石膏). Tom could not move it at all.

     "You must keep your arm in a cast for six weeks." the doctor said, "That would give the broken arm

a chance to heal (愈合)."

     At the end of the six weeks, Tom went back to the hospital. The doctor cut the cast with a large

saw (锯) and took the arm out of the cast.

    "Can you move your arm, Tom?" he asked.

    Tom tried to move his arm. At first it was difficult, but soon he was able to move it a little.

    "Yes, it's fine." he said, "Thank you very much, doctor."

    "In a few days it will be as good as usual." the doctor said, "Just exercise it a little."

    "Will I be able to play the piano?"Tom asked.

     The doctor smiled. "Of course, you will." he said, "You'll have no problem." "That is good news."

Tom said, "Because I couldn't play it at all before."

1. How did Tom break his arm?

A. He fell off a tree.

B. He broke it while playing football.

C. He was hit by a car on the road.

2. How long did he have to keep the arm in the plaster cast?

A. About 40 days.

B. Only for a few days.

C. Almost half a year.

3. What did the doctor tell Tom to do after the cast was taken off?

A. He asked him not to move his arm.

B. He asked him to exercise the arm.

C. He asked him to play the piano.

4. Why was Tom pleased?

A. He thought he would be able to play the piano.

B. The doctor would tell him how to play the piano.

C. The driver would give him a piano as a present.

5. Which of the following is NOT true?

A. The cast was so hard that the doctor had to cut it open with a special tool.

B. Tom liked playing the piano but he didn't know how to play it?

C. An operation on Tom's arm made him be able to play the piano.