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介绍了北仑港三期码头二标段工程粉煤灰地基处理中,采用了表层处理加高真空击密法施工的地基处理新工艺,并就施工过程、施工参数等作了分析,从而证明高真空击密法用于软地基处理是可行的。 相似文献
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高真空击密法处理沿海软土地基的试验研究 总被引:2,自引:1,他引:1
应用高真空击密法对宁波镇海地区软土地基处理进行了施工工艺试验研究。通过对高真空击密法地基处理过程中的地面沉降和超孔隙水压力等进行跟踪监测,研究了不同排水与击密参数时地基沉降和超孔隙水压力消散规律,并且对比分析了处理前后土体物理力学性质的变化。试验研究表明,高真空击密法处理后土体强度有了明显提高,试验达到了预期目的.证明高真空击密法处理该类型软土地基是可行的。 相似文献
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高真空击密法在兴华港区二期工程软基加固中的应用 总被引:3,自引:0,他引:3
介绍HVDM(即高真空击密法)加固处理兴华港区二期工程堆场道路软土地基的设计、施工概况,并就有关问题进行探讨。 相似文献
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高真空击密法在京唐港3 000万t煤炭泊位工程吹填土软基处理中的应用 总被引:1,自引:0,他引:1
详细介绍了高真空击密法的原理及施工控制要点。通过工程实例,以浅层平板载荷及重型动力触探检测结果和沉降观测数据为依据,证明高真空击密处理软土地基有工期短、效果好等优点,在一定意义上将强夯法推广应用到了饱和软粘土。 相似文献
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高真空击密法是一种新兴的软基处理技术工艺。自创造发明至今,它被普遍地用以海岸软基处理。绝大多数沿海地区地质构造环境处在过饱和状态,几乎都没有承载能力。本篇文章结合港口物流中心工程实际情况,剖析了现场试验结果显示,依照地基处理实际效果的综合性检测具体情况,得出将高真空击密法运用于此项目的实际效果是良好的结论。 相似文献
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某工程采用高真空击密法加固地基,为找到经济合理的施工参数,分别在散货堆场(A区)和件杂堆场(B区)
设一个试验区。试验区检测结果表明,A区容许地基承载力达到225 kPa以上,0~8 m内砂层平均标贯击数约20.6击,平均端
阻Ps值约7.48 MPa;B区容许地基承载力达到196 kPa以上,0~7 m内砂层平均标贯击数约17.0击,平均端阻Ps值约6.21 MPa。
本工程是一个典型的长江中下游地区吹填长江粉细砂形成陆域的地基处理案例,对长江中下游类似工程具有参考价值。 相似文献
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介绍了我国港口资源的整合现状,指出港口整合可以提升港口的形象和地位,也为区域经济和城市的发展注入强大的动力。最后指出在港口资源整合中要避免的几个问题。 相似文献
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广州集装箱码头的轮胎式场桥小车制动器使用10多年后,出现了许多问题,故进行了改造.分析了轮胎式集装箱龙门起重机小车制动器的主要故障现象,提出了改造方案,并加以实施. 相似文献
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本文对现有的选定球面轴承的三种工程方法进行了分析比较.引入了“合力系数”,并给出了合力方向上投影面积的精确解. 相似文献
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分析柴油机故障中常见的机体裂纹故障原因,认为由于设计缺陷和管理及操作不当,易造成船舶柴油机缸体上的裂纹多发生在气缸套凸肩处。如不及时处理这些裂纹和故障,就会造成缸套的裂纹直至出现缸套漏水等严重后果,针对NANTAIQUEEN轮柴油机对该类型故障的检修提出具体措施。 相似文献
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The hydrophysical and hydrochemical structure of the Sea of Azov, with developed bottom anoxia, was studied during the RV “Akvanavt” cruise from July 31 to August 03, 2001. The anoxic zone with a thickness from 0.5 to 4 m above the bottom was found in all deep regions of the Sea. Concentrations of hydrochemical parameters were similar to the pronounced anoxic conditions (about 90 mmol m− 3 of hydrogen sulfide, 17 mmol m− 3 of ammonia, 6 mmol m− 3 of phosphate, 7 mmol m− 3 of total manganese). The hydrophysical structure was characterized by the uniform distribution of temperature in the upper 6–7 m mixed layer (UML). Below this a thin (0.4–0.8 m) thermocline layer was observed, just above the anoxic waters. Formation of this phenomenon was connected with that summer weather conditions. Intensive rains led to increased influx of river waters in June. That resulted in large input of allochtonous organic matter (OM) and inorganic nutrients; the latter were consumed on the additional autochthonous organic matter production. In July the weather was characterized by a significant rise in the daily averaged air temperature and large oscillations of temperature during the day. In this period a wind of constant direction was absent, but wind bursts were observed. The completed analyses showed that the formation of such a structure could be connected with the following factors: (i) positive growth trends of the daily averaged temperature and the daily oscillations of temperature, (ii) presence of wind bursts. The joint action of these factors resulted in the formation of the UML. The amplitude of wind bursts determined the depth of UML, and the value of trend determined the value of the temperature change in the thermocline. An initial presence of bottom halocline (caused by the Black Sea water influx to the bottom of the Sea of Azov) prevented the heating of the bottom layer and therefore led to an increase of vertical gradient of temperature in the thermocline. The spatial distribution of the turbulent exchange coefficient confirmed the existence of a “stagnation” area located above the anoxia zone, which is also, apparently, the reason for its occurrence. 相似文献