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海边环境大直径圆形泥水平衡顶管施工工法
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作者 连文浩 《中文科技期刊数据库(文摘版)工程技术》 2024年第7期0151-0155,共5页
目前中国正处在城镇化快速发展的关键时期,基础设施行业迎来前所未有的发展机遇,为城市升级改造,大量城市地下综合管廊、穿路、过河隧道等需建设。“大直径顶管”顶进施工工法正是在此环境下逐步成熟的,目前以圆形直径为主,所谓“大直... 目前中国正处在城镇化快速发展的关键时期,基础设施行业迎来前所未有的发展机遇,为城市升级改造,大量城市地下综合管廊、穿路、过河隧道等需建设。“大直径顶管”顶进施工工法正是在此环境下逐步成熟的,目前以圆形直径为主,所谓“大直径顶管”,通常是指φ2000以上的圆形顶管工程。它是继盾构施工之后发展起来的一种地下管道施工方法,为满足综合性需要,常用的顶管管径也日渐增大,使顶进施工更安全、经济、可靠。 展开更多
关键词 大直径 顶管 海边环境
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Pollution Monitoring Methods and Results of Primorsky Kray Shoreline
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作者 Iana Blinovskaia 《Journal of Earth Science and Engineering》 2014年第10期605-611,共7页
The amount of human-caused environmental impact can be evaluated by the degree of pollution. Active coastal marine environmental exploitation has given rise to another problem: marine litter. The period of time allow... The amount of human-caused environmental impact can be evaluated by the degree of pollution. Active coastal marine environmental exploitation has given rise to another problem: marine litter. The period of time allowing to evaluate the change in the degree of the shore pollution with litter is that from 1999 till 2014. Litter can be classified both by qualitative and quantitative character. Regarding qualitative character litter is divided into organic substance (garbage, wood) and non-organic substance (glass, plastics, rubber, metal). As to the size there are three categories: small, middle, large. As to small litter it is still predominating in the litter structure of the shoreline pollution but its average amount has been decreased significantly. As to the litter distribution, it is mostly concentrated within the beach zone. It is thus natural to assume the land-based origin of the litter, such as litter brought by holiday-makers or introduced by nearby enterprises. 展开更多
关键词 Marine litter distribution Primorsky Kray shoreline litter structure.
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