【正文】 at an altitude of around 5,000 feet (1,524 meters).In order to deploy this chute successfully, he will have to slow to 172 mph (277 kph). He will have a reserve parachute that will open automatically if he loses consciousness at mach speeds.Even if everything goes as planned, it won39。s like the set for a George Lucas movie floating to the edge of space.You and I will have the chance to watch a man take a leap into an unimaginable free fall from the edge of space live.The (lack of) air up there Watch man jump from 96,000 feet Tuesday, I sat at work glued to the live stream of the Red Bull Stratos Mission. I watched the balloons positioned at different altitudes in the sky to test the winds, knowing that if they would just line up in a vertical straight line we would be go for launch.I feel this mission was created for me because I am also a journalist and a photographer, but above all I live for taking a leap of faith the feeling of pushing the envelope into uncharted territory.The guy who is going to do this, Felix Baumgartner, must have that same feeling, at a level I will never reach. However, it did not stop me from feeling his pain when a gust of swirling wind kicked up and twisted the partially filled balloon that would take him to the upper end of our atmosphere. As soon as the 40acre balloon, with skin no thicker than a dry cleaning bag, scraped the ground I knew it was over.How claustrophobia almost grounded supersonic skydiverWith each twist, you could see the wrinkles of disappointment on the face of the current record holder and cap (capsule munications), Col. Joe Kittinger. He hung his head low in mission control as he told Baumgartner the disappointing news: Mission aborted.The supersonic descent could happen as early as Sunday.The weather plays an important role in this mission. Starting at the ground, conditions have to be very calm winds less than 2 mph, with no precipitation or humidity and limited cloud cover. The balloon, with capsule attached, will move through the lower level of the atmosphere (the troposphere) where our daytoday weather lives. It will climb higher than the tip of Mount Everest ( miles/ kilometers), drifting even higher than the cruising altitude of mercial airliners ( miles/ kilometers) and into the stratosphere. As he crosses the boundary layer (called the tropopause), he can expect a lot of turbulence.The balloon will slowly drift to the edge of space at 120,000 feet ( miles/ kilometers). Here, Fearless Felix will unclip. He will roll back the door.Then, I would assume, he will slowly step out onto something resembling an Olympic diving platform.Below, the Earth bees the concrete bottom of a swimming pool that he wants to land on, but not too hard. Still, he39。s not needed. Instead, he plans to deploy his 270squarefoot (25squaremeter) main chute at an altitude of around 5,000 feet (1,524 meters).In order to deploy this chute successfully, he will have to slow to 172 mph (277 kph). He will have a reserve parachute that will open automatically if he loses consciousness at mach speeds.Even if everything goes as planned, it won39。場地平整、碾壓現(xiàn)澆箱梁施工工藝框圖滿堂支架地基處理碗口支架搭設頂托枋木、下次梁鋪設設翼緣板模板安裝腹板模板安裝模板安裝支架預壓鋼筋加工底腹板鋼筋綁扎原材料準備砼拌合底腹板砼澆注養(yǎng)護箱梁頂板內(nèi)膜安裝鋼筋加工箱梁頂板鋼筋綁扎原材料準備砼拌合頂板砼澆注砼養(yǎng)護測定同養(yǎng)砼試件拆除支架及模板45安全生產(chǎn)保證體系安全無事故獎罰嚴明下步規(guī)劃安 全 年措施保證包保責任制人身安全檔案安全設施檔案措施得力安全信息反饋確保生產(chǎn)安全制度完備獎罰兌現(xiàn)工班QC小組質 量 第 一生命 至 上下道工序安全教育制定教育計劃工區(qū)QC小組掌握規(guī)范驗收標準技 術 交 底提高安全意識全 員機械車輛高空水下作業(yè)抓好重點經(jīng)常檢查定期檢查五 防安全勞動競賽總結評比安全獎金掛鉤二級檢查工資掛鉤經(jīng)濟責任制經(jīng)濟保證制度保證控制兩率組織保證思想保證安全生產(chǎn)保證體系項目經(jīng)理部安全委員會安全教育Editor39。 做好施工現(xiàn)場各類機械設備和車輛分類安置工作，工地車輛出入口設置用混凝土圍成的洗車場和沉淀池，配置高壓沖洗槍，車輛上路前或回到駐地均應沖洗干凈。K、拆除順序嚴格按照從上往下，后搭先拆、先搭后拆的順序，拆除從內(nèi)向外拆除，各種構配件嚴禁拋擲至地面。G、如遇強風、雨等特殊氣候，不進行支架搭設或拆除作業(yè)。立柱的垂直度，按規(guī)定無論從何種角度測量，必須達到50mm以內(nèi)，且總高度的偏差不得大于100mm?？刂泼繉訚仓叨炔怀^30cm，既利于振搗密實，又加快熱量散失，避免產(chǎn)生溫度裂縫。在養(yǎng)護期內(nèi)，要嚴禁利用將橋面作為施工場地或堆放原材料。澆注混凝土時，翼板腹板面盡量避免水泥漿濺在模板上，影響混凝土的質量和美觀?；炷翍竦交炷帘砻嫱Ｖ瓜鲁?，不冒氣泡，表面泛漿為止。澆筑過程中底板腹板用插入式振搗器振搗，頂板部分采用平板式振搗器配合插入式振動器振搗，箱梁砼澆注前，必須進行全面檢查，經(jīng)自檢和監(jiān)理檢查確認后，方可進行澆筑。混凝土由拌合站集中拌合，并準確控制水灰比及用水量，為提高混凝土強度及增加混凝土和易性，應摻入外加劑。（8）、箱梁鋼筋現(xiàn)場綁扎時,頂板、底板、腹板內(nèi)有大量的預埋預應力管道，為了不使預應力波紋管損壞，一切焊接在波紋管埋置前進行，管道安裝后盡量不焊接，當普通鋼筋與波紋管位置發(fā)生矛盾時，適當移動鋼筋位置，確保預應力筋管道位置準確。對于焊接接頭，在接頭長度區(qū)段內(nèi)（35D且不小于500mm）同意根鋼筋不得有兩個接頭。（4）、通長受力主筋的連接采用搭接焊。鋼筋加工形狀、尺寸應嚴格按設計圖紙執(zhí)行，標準彎鉤應嚴格執(zhí)行規(guī)范。首跨外側模板及翼緣模板安裝時，采用16t汽車吊起吊。箱梁內(nèi)模支撐采用鋼管做橫支撐和豎支撐形成組合“＃”字排架，立柱支撐在底模頂面上，,且每排均需設置縱、橫水平撐，以增加支架的整體穩(wěn)定性，防止內(nèi)模脹模，內(nèi)模支架的搭設原理及方式與滿堂腳手架的搭設原理及方式基本相同；立柱支撐點必須與橫橋向底模下的木枋位置對應，而且立柱不可直接支撐在底模頂，兩者間須墊設混凝土墊塊。在鋪設底模前先放置好支座，并在支座位置處根據(jù)梁底的楔塊尺寸在底模上開孔，在開孔處支立梁底楔塊的模板，楔塊的底模根據(jù)預埋鋼板的尺寸也開孔，預埋鋼板與楔塊的底模用高強砂漿密封。施工前將所有垃圾清理干凈，防止石子等濺落傷人。F、作業(yè)人員處于高處危險施工全過程，必須佩戴安全帶，保險鉤宜高掛低用并扣在牢固部位。B、剪刀撐、橫向斜撐等要同鋼管立柱同步搭設。根據(jù)梁的拱度值線形變化，其它各點的預拱度值，應以中間點為最高值，以梁的兩端為零，按二次拋物線進行分配。觀測注意事項 ：，可根據(jù)實際情況適當增加。擬采用人工裝滿砂袋，用25t汽車吊吊裝，按要求的位置和高度人工配合堆碼。其中鋼棒的直徑為150mm，45號圓鋼。②5墩強度和剛度演算A、強度演算5墩支撐梁彎矩：Mmax=ql2/8=1/8*=單片貝雷片承受彎矩：W=＜[M]=5墩支撐貝雷片強度滿足要求。支撐梁受力情況：a；b；c、支架自重=；d、貝雷梁自重=；e、施工人員及機具重量=；f、混凝土灌注振搗=2KN/m；將以上（1項+2項+3項+4項）+（5項+6項）。如規(guī)定的容許應力與前述不同，應另行計算；D；；；；E、表列國產(chǎn)貝雷的力學性質未計入加強弦桿。貝雷梁在梁跨下的地面拼接好后，采用兩臺吊車整體吊裝就位。底模下次梁采用510cm方木按15cm間距順橋向布設。考慮為方便施工，貝雷梁布設以最寬寬度平行布設，布設間距4，由于箱梁為變截面，5。2）支撐梁，5墩與臨時墩頂各兩片，共布置6片，起著將梁結構自重、支架荷載和施工荷載等傳到圓柱墩和臨時墩上的作用。結果：**103/（**102）=≤170/=11