问题 问答题

涂膜防水屋面施工,如何对水落口进行增强处理

答案

参考答案:水落口增强做法
1)水落口是屋面雨水汇集的部位,是最易发生渗漏的部位,水落口杯与屋面结构交接处会形成一道缝隙,所以应特意将缝隙加大到深和宽各为20mm的凹槽。凹槽内嵌填密封材料,堵塞渗水通道,然后再在水落口周围直径50mm范围内加铺2层有胎体增强材料的附加层,并应伸人杯内不得小于50mm。
2)根据“防排结合”的原则,还应增大水落口周围直径500mm范围内的排水坡度,规定不应小于5%。
水落口杯的埋设高度应充分考虑上述厚度所增加的尺寸,使排水坡度不小于5%。

阅读理解

阅读理解。

      Mr Wood is very old. He has seen many changes in his hometown.

      He knows that things are different now. But he never forgets the old days. He

likes to talk about them. He often talks about his favorite birds, the robins. "When I

was a boy, these houses were not here. There were wide fields and tall trees. Every

spring the robins would come. Thou sands of them would fly up to the north from the south. They spent the winter in the south. Some would build their nests(巢)in the trees near our houses. Then people started to cut down trees, and they built more houses. The robins stopped coming. They couldn't build their nests near our houses because

there were no trees. "

     "Now there are too many houses and too many roads. There are no places for the robins. They do not come any more. "

                            

1. Mr Wood often talks about          .

A. his old house        

B. the old days

C. his life now          

D. his family

2. The birds, the robins, spent the winter in        .

A. the south            

B. the west

C. the north            

D. the east

3. Then people _       trees because they wanted to build more houses.

A. cut down            

B. planted

C. bought              

D. watered

4. From the passage we can know that       .

A. Mr Wood likes his new life now

B. there were many houses there in the old days

C. the robins can make their nests without trees

D. Mr Wood is not happy with the changes there

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