【正文】 nd he was not regretted it. He is finding his new work far more exciting. When he was driving along Catford Street recently, he saw two thieves rush out of a shop and run towards a waiting car. One of them was carrying a bag full of money. Roy acted quickly and drove the bus straight at the thieves. The one with the money got such a fright that he dropped the bag. As the thieves were trying to get away in their car, Roy drove his bus into the back of it. While the battered car was moving away, Roy stopped his bus and telephoned the police. The thieves39。 car was badly damaged and easy to recognize. Shortly afterwards, the police stopped the car and both men were arrested. Lesson36 Across the Channel 橫渡海峽Erna Hart is going to swim across the English Channel tomorrow. She is going to set out from the French coast at five o39。clock in the morning. Erna is only fourteen years old and she hopes lo set up a new world record. She is a strong swimmer and many people feel that she is sure to succeed. Erna39。s father will set out with her in a small boat. Mr Hart has trained his daughter for years. Tomorrow he will be watching her anxiously as she swims the long distance to England. Erna intends to take short rests every two hours. She will have something to drink but she will not eat any solid food. Most of Erna39。s school friends will be waiting for her on the English coast. Among them will be Erna39。s mother, who swam the Channel herself when she was a girl.Lesson37 The Olympic Games 奧林匹克運動會The Olympic Games will be held in our country in four years39。 time. As a great many people will be visiting the country, the government will be building new hotels, an immense stadium, and a fine new swimming pool. 39。They will also be building new roads and a special railwayline. The Games will be held just outside the capital and the whole area will be called 39。Olympic City39。. Workers will have pleted the new roads by the end of this year. By the end of next year, they will have finished work on the new stadium. The fine modern buildings have been designed by Kurt Gunter. Everybody will be watching anxiously as the new buildings go up. We are all very excited and are looking forward to the Olympic Games because they have never been held before in this country.Lesson38 Everything except the weather 惟獨沒有考慮到天氣My old friend, Harrison, had lived in the Mediterranean for many years before he returned to England. He had often dreamed of retiring in England and had planned to settle down in the country. He had no sooner returned than he bought a fine house and went to live there. Almost immediately he began to plain about the weather, for even though it was still summer, it rained continually and it was often bitterly cold. After so many years of sunshine, Harrison got a shock. He acted as if he had never lived in England before. In the end, it was more than he could bear. He had hardly had time to settle down when he sold the house and left the country. The dream he had had for so many years ended there. Harrison had thought of everything except the weather.Lesson39 Am I all right? 我是否痊愈？While John Gilbert was in hospital, he asked his doctor to tell him whether his operation had been successful, but the doctor refused to do so. The following day, the patient asked for a bedside telephone. When he was alone, he telephoned the hospital exchange and asked for Doctor Millington. When the doctor answered the phone, Mr Gilbert said he was inquiring about a certain patient, a Mr John Gilbert. He asked if Mr Gilbert39。s operation had been successful and the doctor told him that it had been. He then asked when Mr Gilbert would be allowed to go home and the doctor told him that he would have to stay in hospital for another two weeks. Then Dr Millington asked the caller if he was a relative of the patient.39。 No,39。 the patient answered,39。 I am Mr John Gilbert.39。 Lesson40 Food and talk 進餐與交談Last week at a dinnerparty, the hostess asked me to sit next to Mrs Rumbold. Mrs Rumbold was a large, unsmiling lady in a tight black dress. She did not even look up when I took my seat beside her. Her eyes were fixed on her plate and in a short time, she was busy eating. I tried to make烏拉山發(fā)電廠燃煤空冷發(fā)電機組茶化鍋爐方案目 錄1. 鍋爐施工方案概述…………………………………………7232. 鍋爐鋼結(jié)構(gòu)安裝方案…………………………………………7233. 受熱面設(shè)備安裝…………………………………………7214. 施工吊裝機械、機具選用和場地布置………………………7214. 汽包吊裝方案…………………………………………………7215. 水冷壁施工方案……………………………………………7218. 過熱器施工方案………………………………………………7220. 再熱器安裝方案………………………………………………7222. 省煤器安裝方案………………………………………………7222. 主要質(zhì)量標(biāo)準、工藝要求和安全技術(shù)措施……………………72224. 轉(zhuǎn)動機械安裝方案………………………………………7224. 空氣預(yù)熱器安裝方案…………………………………………7224. 鋼球磨煤機安裝方案…………………………………………7229. 風(fēng)機安裝方案…………………………………………………72345. 鍋爐水壓試驗方案…………………………………………72406. 鍋爐電除塵器方案………………………………………72487. 主要施工措施……………………………………………7261. 鍋爐鋼架安裝施工措施………………………………………7261. “六道”安裝方案………………………………………………7261. 平臺扶梯安裝施工措施………………………………………7262. 輔機安裝施工措施……………………………………………7262. 受熱面安裝施工措施…………………………………………7263. 工藝管道安裝措施……………………………………………72651. 鍋爐安裝方案概述在火力發(fā)電機組的整個安裝工程中，鍋爐專業(yè)以其工程量大、施工工期長、高空作業(yè)多、作業(yè)環(huán)境惡劣等原因成為安裝工程的重點、難點，同時作為整個安裝工程的排頭兵，其安裝工程直接影響到整個工程的網(wǎng)絡(luò)計劃能否正點運行。鍋爐鋼架安裝采用分段吊裝法，即每安裝完一層鋼架，就進行找正，高強螺栓終緊，質(zhì)量驗收，然后安裝上一層鋼架。相應(yīng)的平臺、樓梯隨即安裝。汽包在卸貨線用頂升滑移法裝特型平板車，水平運輸?shù)桨惭b位置后，用M250t履帶吊直接卸車，并放在Z1柱和Z2柱之間臨時鋪設(shè)的滑道上，然后用2套200t汽包起吊裝置安裝就位。根據(jù)現(xiàn)場布置情況和鍋爐結(jié)構(gòu)特點，鍋爐受熱面設(shè)備如水冷壁采取地面預(yù)組合、小組件安裝就位施工方案，高溫過熱器、屏式過熱器、包墻過熱器、高溫再熱器均采取散裝方式。低溫過熱器、低溫再熱器的蛇行管組合成單片，然后在爐后臨時大平臺上通過臨時布置在尾部豎井上方的電動葫蘆安裝就位。鍋爐“六道”要及時穿插到位存放，并采取加固措施；各轉(zhuǎn)動機械要認真進行檢修，按照安裝說明書的安裝程序施工，做到轉(zhuǎn)動靈活、振動小、噪音低。2. 鍋爐鋼結(jié)構(gòu)安裝方案. 概況及特點鍋爐鋼架分上部柱梁、中部柱梁和下部柱梁三大部分、共計四層(上部二層)，，對稱布置，柱段之間、柱段與梁、垂直支撐與梁、柱之間采用了高強度螺栓聯(lián)接。 頂板大梁由5根主梁，43根次梁和若干小梁、格條、水平支撐等組成，最重件DL4大板梁，長22米，，主梁與次梁之間采用了高強度螺栓聯(lián)接方式，其它連接采用焊接。 鋼結(jié)構(gòu)主要承重部件如立柱、橫梁、頂板主、次梁的材質(zhì)為19Mn5和16Mn ，高強度螺栓材質(zhì)為20MnTiB。平臺梯子、平臺的布置方便運行和檢修需要。經(jīng)常操作和檢修地點的平臺、司水小室平臺和簡易防雨設(shè)施的頂部采用花紋鋼板平臺，其余采用剛性格柵板平臺。鍋爐主要扶梯采用爐前兩側(cè)集中布置。. 施工機械的選用鍋爐鋼結(jié)構(gòu)的吊裝采用一臺FZQ1250型附臂吊、一臺DBQ3000tm塔式起重機和一臺M250履帶式起重機作為主要施工機械，DBQ3000tm布置在鍋爐擴建側(cè)（完成本標(biāo)段鍋爐大板梁吊裝后，退出集控室，交建筑開始集中