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结合广东省汕汾高速公路汕头海湾大桥北引道路面加铺工程,分析软基路段过渡性路面的病害,提出沥青混凝土路面罩面结构设计和施工中须注意的问题. 相似文献
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2009年11月23日,国家发改委针对2009年9月,美国不顾中国强烈反对,启动“特定产品过渡性保障机制”、采取“特殊保护措施”、限制我对美轮胎出口一事发表文章,提出5项措施,以维护我国轮胎工业的健康发展。 相似文献
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Following the basic theory of protecting gas-reservoirs from damage with the temporary bridging technology, inert calcium carbonate (CaCO3) particles, whose diameter is consistent with the size of pores or apertures in the reservoir, were selected as the bridging agent, and modified resolvable starch was selected as filtration loss reducing particles to form the non-clay low damage temporary bridging drilling/completion fluids system (NLTDFS). Under the simulated condition of the well bottom during real drilling, NLTDFS was used to conduct dynamic and static damage experiments of cores for 48 hours, respectively, and then the experimented cores were permeated with pure nitrogen from the undamaged end to the damaged one to measure their recovery of permeability. The results showed that the permeability recovery rate of the core reached 90% or so, and the damaged depth was less than 1 cm, which demonstrates that NL TDFS has higher temporary bridging effectiveness and lower damage to the gas-reservoir than other drilling fluids system. NLTDFS has been used to drill many horizontal wells, and four of them have obtained high yield of natural gas. The yield of natural gas of LPl well reached 85 X 104 m3/day after completion with the rump pipe. The formation of the stable well wall and smooth drilling led to an API loss less than 4 mL and an HTHP loss less than 15 mL. 相似文献
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目前仍在使用的《全国汽车、民用改装车和摩托车生产企业及产品目录》,是计划经济时代管理思想的产物。其目的是限制从事汽车、改装车和摩托车制造企业的数量,限制这些企业间产品重叠的程度,减少社会资源的浪费。 相似文献
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本文介绍了广东省西部沿海高速公路台山段软基路段过渡性加铺设计,在充分分析高速公路软基段运营通车后出现的各种问题基础上,对加铺方案的选择、裂缝的处理等提出了有效的处治措施。 相似文献
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