问题 问答题 简答题

怎样浇筑设备基础?

答案

参考答案:

1.必须有经过批准的设备基础施工图。并要熟悉图纸的各项规定和要求,同时要对地脚螺栓的空间位置清楚,并应记牢尺寸。

2.按图纸规定备足浇筑混凝土设备基础所需的各种材料。

3.按图纸的规定进行刨槽。必须确保基础槽的长、宽、深度的尺寸,槽帮槽底必须刷平整。

4.设备基础出露地面部分,要钉好模板,保证这部分尺寸和台面平整。要钉好地脚螺栓的预留孔槽。

5.要准确的充分的留设出地脚螺栓的预留孔。

6.浇灌混凝土前,应认真检查基础槽的位置、各部尺寸是否合适,槽帮底面是否平整,浮物清除是否干净,一切合格方准浇灌混凝土。

7.浇灌混凝土的垂直下落高度较大(2m以上)时,应使用溜槽运送或分段转运,以免混凝土在下落过程中发生分离现象。

8.每次浇灌混凝土的厚度不应超过300mm,过厚了就不易捣固。同时浇灌混凝土在到达地脚螺栓的预留孔部位时,注意保持预留孔位置不偏移,不歪斜,不缩短,孔内不进杂物。

9.为保证混凝土的密实性和整体性,需采取连续浇灌法。浇灌中,如间隔2h以上,必须把上次浇灌混凝土的表面凿麻面,并铺设一层稀灰浆,然后在浇灌混凝土。

10.在开始浇灌混凝土时,应先铺一层厚度约12-15mm铺底灰浆,铺底灰浆用l:3的水泥砂浆。

11.混凝土养护后就可以拆模,设备基础的模板在地面拆,主要是预留孔的模板必须拆除净,并注意用木塞封堵,防止掉入杂物。

13.基础台面的抹面修饰工作,按施工图纸的规定进行。

14.在预留孔内固定地脚螺栓工作,应在设备安装时进行。

完形填空
阅读短文,根据短文内容,从短文后的五个选项中选出能填入空白处的最佳选项。选项中有一项为多余选项。(共8分,每小题2分)
Flying Doctors
Most people go to a doctor in their own town or suburb(近郊). But people in the Australian outback can’t get to a doctor quickly. The nearest doctor is sometimes hundreds of kilometers away so they have to call him on a two-way radio. 1       . He visits sick people by plane.
When someone is very sick, the doctor has to fly to the person’s home. His plane lands on a flat piece of ground near the person’s house. Sometimes the doctor has to take the patient to hospital. 2       .
However, most of the time the person isn’t very sick, and the doctor doesn’t have to visit. 3         . He can tell the patient to use some medicine from a special medicine chest. There is one of these chests in every home in the outback. Each bottle, tube and packet in the chest has a number. The doctor often says something like this: “Take two tablets(药片) from bottle number 5 every four hours.”
4          . He had only one plane. Today there are 14 flying doctor centers, 29 planes, 14 full-time doctors and several part-time doctors, nurses and dentists.
A. He can give advice on the radio from the office at the flying doctor center
B. Flying doctors treat their patients quickly
C. This special doctor is called the “flying doctor”
D. A man called John Flynn started the Royal Flying Doctor Service in 1927
E. Flying doctors take about 8,600 people to hospital each year
 
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