某烟囱采用壳体基础，基础直径14m，埋深4m，地基持力层为稍密粉_爱下问搜题

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问题问答题

某烟囱采用壳体基础，基础直径14m，埋深4m，地基持力层为稍密粉砂，f_ak＝156kPa，γ＝18.5kN/m³，烟囱筒自重45000kN，若地震力作用于地面以上60m处，试验算地基承载力（地震影响系数α＝0.018）。

答案

参考答案：

经深、宽修正后地基承载力特征值

f_a＝f_ak+η_bγ(b-3)+η_dγ_m(d-0.5)

η_b＝2，η_d＝3

f_a＝156+2×18.5×(6-3)+3×18.5×(4-0.5)

＝156+305.3＝464.3kPa

地震地基承载力特征值

地震水平惯性力 F_E＝αG₁＝0.0187×45000＝8415kN

对基底力矩 M＝F×(60+4)＝8415×64＝53856kN·m

完形填空

I first went to hear a live rock concert when I was eight years old. My brother and his friends were all ___1____ of a heavy metal group called Black Wednesday. When they ___2____ that Black Wednesday were going to perform at our local theatre, they all bought ____3___ for performance. However, at the last minute, once of the friends couldn’t go, so my brother __4_____ me the ticket. I was really ___5___!
I remember the buzz (嘈杂声) of excitement inside the theatre as we all found our __6____ . After a few minutes, the lights went down and everybody became ___7____. I could barely make out the stage in the ___8____. We waited. Then there was a roar from the crowd, like an explosion, as the first members of the band ___9____ the stage. My brother leaned over and shouted something in my ear, but I couldn’t ____10___ what he was saying. The first song was already starting and the music was as ____11___ a jet engine. I could ___12____ the drum beats and bass notes in my stomach.
I can’t recall any of the songs that the band played. I just __13_ that I really enjoyed the show and didn’t want it to _ 14_. But in the end, after three encores (加演), the show finished. We left the 15_ and walked unsteadily out onto the pavement. I felt a little dizzy, as if I had just 16_from a long sleep. My ears were still 17 _with the beat of the last song.
After the 18 , I became a Black Wednesday fan too for a few years before getting into other kinds of music. Once in a while, 19_, I listen to one of their songs and 20_I’m back at that first show.

B．embarrassed

A．comfortable

B．got through

D．stepped onto

A．competition

B．performance

D．celebration

判断题

空调制冷管路一旦拆开，制冷剂就会全部漏光。