大肉大捧一进一出视频来了,肉嫁高柳1~4动漫在线观看,四虎影院176,波多野42部无码喷潮

造價(jià)通
更新時(shí)間:2025.05.10
青藏鐵路設(shè)計(jì)與建設(shè)——第六屆國(guó)際凍土工程會(huì)議回顧(英文)

格式:pdf

大?。?span class="single-tag-height">1.4MB

頁(yè)數(shù): 8頁(yè)

The 6~(th) International Symposium on Permafrost Engineering was successfully held in China in September 2004. About 150 scientists and engineers from 7 countries attended the symposium in Lanzhou on 5~7 September, and about 35 people from 6 countries participated in the field trip along the Qinghai-Tibet Highway/Railway on 8~13 September and the seminar in Lhasa on 14 September 2004. During the Symposium, the latest progress on permafrost engineering and the surveys, design and construction of the Qinghai-Tibet Railway were exchanged and inspected. Fifty-eight technical papers in English from the Symposium were published in the first volume of the Proceedings of the Symposium, as a supplement of the Journal of Glaciology and Geocryology, before the symposium. About 6 papers from the symposium are published in the second volume in the volume 27(1) of the Journal of the Glaciology and Geocryology, after the symposium.;The Qinghai-Tibet Railway (QTR) under construction will traverse 632 km of permafrost, and the engineers are facing unprecedented engineering and environmental challenges. With the QTR under construction and to be completed in 2007, permafrost engineering has become the research focus of permafrost scientists and engineers in China. Many encouraging and promising achievements in permafrost engineering have been obtained during the past three years. However, there are still numerous engineering and environmental problems needing to be solved or resolved. ;In the discussions, some experts pointed out that methods, such as removal of snow cover on the embankments and toe areas, light-color embankments and side slope surfaces, awnings for shading the solar radiation, hairpin or tilted thermosyphons, could be applied to actively cool the roadbed of the QTR. Some new ideas on utilization of the natural cold reserves were proposed to protect the QTR permafrost roadbed from thawing. Many questions and answers on the survey, design, construction, operations, maintenance and environmental protection were exchanged in situ and in the Lhasa seminar with participation by some major railway designers, regulators and administrators.

青藏鐵路唐拉段地質(zhì)災(zāi)害的評(píng)價(jià)分析

格式:pdf

大?。?span class="single-tag-height">492KB

頁(yè)數(shù): 4頁(yè)

筆者主要對(duì)青藏鐵路唐拉段沿線分布的熱融滑坍、熱融湖塘、濕地、沙害、危巖、落石等地質(zhì)災(zāi)害進(jìn)行了評(píng)價(jià)分析 ;研究了其對(duì)鐵路工程的影響、工程建設(shè)施工對(duì)地質(zhì)災(zāi)害的誘發(fā)和加劇的可能性 ;提出了施工中應(yīng)采取的防范措施。

熱門(mén)知識(shí)

青藏鐵路設(shè)計(jì)師

精華知識(shí)

青藏鐵路設(shè)計(jì)師

最新知識(shí)

青藏鐵路設(shè)計(jì)師
點(diǎn)擊加載更多>>

相關(guān)問(wèn)答

青藏鐵路設(shè)計(jì)師
點(diǎn)擊加載更多>>
專題概述
青藏鐵路設(shè)計(jì)師相關(guān)專題

分類(lèi)檢索:

主站蜘蛛池模板: 江北区| 拜城县| 福海县| 苍溪县| 岫岩| 华安县| 南部县| 广水市| 莲花县| 兴隆县| 渭南市| 布拖县| 若羌县| 嵊泗县| 西吉县| 宣威市| 东兰县| 绍兴市| 南安市| 柏乡县| 南川市| 东兴市| 合阳县| 怀仁县| 新泰市| 福泉市| 灵石县| 区。| 曲靖市| 康定县| 博白县| 衡南县| 来安县| 团风县| 宁海县| 滁州市| 留坝县| 凤山县| 拜泉县| 河东区| 遵义市|