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AbstractBased on the analyses of fundamental meteorological and hydrogeological conditions at the site of a tunnel in the cold regions, a combined convection-conduction model for air flow in the tunnel and temperature field in the surrounding has been constructed. Using the model, the air tempe..
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全球城市化進(jìn)程的加快將會(huì)對(duì)人類將來(lái)的生存方式產(chǎn)生重大影響。隨著全球人口的增長(zhǎng)以及更多國(guó)家要求提高生活水平，世界必須提供更多食物，能源以及礦物資源來(lái)維持此增長(zhǎng)趨勢(shì)。解決這一難題的辦法有三大渠道復(fù)合而成：農(nóng)業(yè)用地的保護(hù)從而得到更深入的利用；日益增長(zhǎng)的全球城市人口；對(duì)保護(hù)和改善環(huán)境日益增長(zhǎng)的關(guān)注，特別..
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Along with the speeding of town house construction step, not a few areas with small residences set up one after another, many inhabitants move continuously into the new residence, their quality to housing request is more and more high, particularly pay attention to very much to some cracks circum..
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1. Abstract Materials and structural forms are combined to make up the various parts of a building, including the load-carrying frame, skin, floors, and partitions. The building also has mechanical and electrical systems, such as elevators, heating and cooling systems, and lighting systems. The ..
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AbstractThe combined effects of creep and shrinkage of concrete and relaxation of prestressing tendons cause gradual changes in the stresses in both concrete and prestressing tendons. A simple method is presented to calculate the long-term prestress loss and the long-term change in concrete ..
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摘 要本文通過(guò)多年的現(xiàn)場(chǎng)觀察，通過(guò)查閱有關(guān)混凝土內(nèi)部應(yīng)力方面的專著，對(duì)混凝土溫度裂縫產(chǎn)生的原因、現(xiàn)場(chǎng)混凝土溫度的控制和預(yù)防裂縫的措施進(jìn)行等進(jìn)行闡述。關(guān)鍵詞：混凝土；溫度應(yīng)力；裂縫；控制1 混凝土在現(xiàn)代工程建設(shè)中占有重要地位。而在今天，混凝土的裂縫較為普遍，在橋梁工程中裂縫幾乎無(wú)所不在。盡管我們?cè)谑┕?.
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摘要：這是一篇關(guān)于討論土木工程危機(jī)的文章。在過(guò)去，土木工程是人類文明的先驅(qū)；然而現(xiàn)在，他們很少地被當(dāng)作領(lǐng)導(dǎo)者和革新者被覺(jué)察。在這里作者力勸那些土木工程師們?yōu)榱粟A回工程師行業(yè)的領(lǐng)導(dǎo)地位，要使現(xiàn)在的挑戰(zhàn)變更，而且要使土木工程這個(gè)職業(yè)能夠適應(yīng)新的要求。全球化的進(jìn)程簡(jiǎn)短地被討論為現(xiàn)在這種情形的一個(gè)重要組..
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oncrete and reinforced concrete are used as building materials in every country. In many, including the United States and Canada, reinforced concrete is a dominant structural material in engineered construction. The universal nature of reinforced concrete construction stems from the wide availabi..
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ABSTRACTThe design and execution of ground investigation works for earthwork projects has become increasingly important as the availability of suitable disposal areas becomes limited and costs of importing engineering fill increase. An outline of ground investigation methods which can augment ‘t..
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