天津開發(fā)區(qū)泰達大街人行天橋工程投標文件（技術(shù)標）.doc
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天津開發(fā)區(qū)泰達大街人行天橋工程技術(shù)文件
1、 工程概況：
1.1、工程簡述
泰達大街位于開發(fā)區(qū)中心區(qū)域金融區(qū)泰豐公園附近，跨越泰達大街，是天津市開發(fā)區(qū)又一使用價值與景觀效果并重的人行天橋。
泰達天橋與下穿泰達大街基本正交，根據(jù)甲方要求人行天橋必須一跨跨越泰達
大街90規(guī)劃紅線，考慮到橋墩寬度尺寸，選定跨徑為92.5m，橋面全寬6.5m，
橋面凈寬4m。橋梁主體為鋼結(jié)構(gòu)單斜塔、主受力后背索、左右穩(wěn)定索和橋面空
間斜拉索聯(lián)系組成空間受力體系，塔與梁體結(jié)構(gòu)分離（指通過柔性的斜拉索聯(lián)
系）。橋梁兩側(cè)各設(shè)置凈寬2.4m人行梯道2座、電梯1座。
1.2、自然、氣候條件
1）氣候：天津市屬于暖帶半濕潤季風氣候，位于大陸性與海洋性氣候的過渡帶上，四季分明。冬季受蒙古冷高氣壓控制，盛行西北風；夏季受太平洋副熱帶高氣壓左右，多為偏南風。氣候特點是：春季干旱多風，冷暖多變；夏季溫高濕重，雨熱共濟；秋天天高云淡，風和日麗；冬季寒冷干燥，雨雪稀少。
2）氣溫：年平均氣溫11.1~12.3℃，七月平均氣溫26℃以上，一月平均氣溫-4℃以下，極端最高溫40.3℃，極端最低氣溫-21℃
3）降水量：年平均降水量550~680mm，一日最大暴雨量304.4mm，每年6~9月為汛期，平均雨日34天左右，占全年總降水量的73%以上，冬季雨雪量只占全年總降水量的1%~3%。
4）冰凍：標準凍土深度0.6m左右。
5）風：年平均風速2~5m/s，最大風速22m/s，瞬間風速大于等于17m/s，年平均日數(shù)為31~53天。
6）濕度：7，8月份平均值可達80%，2~4月份最低值為0。
1.3、地質(zhì)條件
本場地埋深60.30m深度范圍內(nèi)，地基土按成因年代可分為以下7層，按力學性能可分為11個亞層，自上而下為
TEDA TEDA Avenue Pedestrian Bridge project technical documents
1, Project Overview:
1.1, Project Description
TEDA Avenue is located in the Regional Development Centre Tai Fung Park near the financial district, across the Avenue Teda, Tianjin Development Zone is another value and landscape effects of both the pedestrian bridge.
TEDA TEDA Avenue beneath the flyover and the basic orthogonal, pedestrian bridge under the Party required to be a cross across the TEDA
Avenue 90 planning red line, taking into account the size of pier width, the selected span is 92.5m, deck the full width 6.5m,
Deck net width 4m. Leaning Tower of the main single for the steel bridge, the main force back cable, so cable and deck space and stability
Cable link between the stress system composed of space, tower and beam structure separation (defined by flexible cable joint
Lines). Each side of the bridge to set clear width 2.4m pedestrian stair 2, elevators 1.
1.2, natural and climatic conditions
1) Climate: Tianjin is warm with a humid monsoon climate, continental and maritime climate in the transition zone, the four distinct seasons. Cold winter by the Mongolian high-pressure control, the prevailing northwest wind; summer by the Pacific subtropical high pressure around, mostly for southerly winds. Climate characteristics: dry and windy spring, warm and cold changeable; summer temperature and humidity heavy rain hot Freemasonry; autumn sky was clear and sunny; winter cold and dry, rain and snow scarce.
2) Temperature: average temperature of 11.1 ~ 12.3 ℃, the average July temperature of 26 ℃ above the average temperature of -4 ℃ in January the following, extremely high temperature 40.3 ℃, extreme minimum temperature of -21 ℃
3) Rainfall: average annual rainfall of 550 ~ 680mm, the biggest day of torrential 304.4mm, 6 September for the annual flood season, the average rain days 34 days or so, accounting for 73% of total annual precipitation over the winter rain and snow only total annual precipitation amount of 1% to 3%.
4) Frozen: standard depth of frozen soil around 0.6m.
5) wind: average wind speed of 2 ~ 5m / s, the maximum wind speed 22m / s, instantaneous wind speed is greater than equal to 17m / s, the average number of days was 31 ~ 53 days.
6) Humidity: 80% average of 7,8 months, 2 April the minimum value of 0.
1.3, geological conditions
Depth of 60.30m this site within the depth of soil by cause can be divided into the following seven years layer, according to the mechanical properties can be divided into 11 sub-layers, top to bottom as