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首页> 外文会议>Tenth International Conference on Cold Regions Engineering Putting Research into Practice August 16-19, 1999 Lincoln, New Hampshire >Pile design in saline permafrost at Longyearbyen
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Pile design in saline permafrost at Longyearbyen

机译：朗伊尔城盐渍多年冻土中的桩设计

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The University Courses on Svalbard (UNIS) constructed in 1994 a two and a half story university building with a total ground area of 3.200 m~2 in Longyearbyen, Svalbard. The building was sited near the shore and the geotechnical investigations showed soil pore water salinities in permafrost increasing from 5 g/l at the surface to 25 g/l at 10 metres depth. The geotechnical investigations included classification of the soils, measurements of water content, pore water salinity, and wet and dry density. Several concepts for foundation design were evaluated including ventilated gravel pad, heat pump foundation, steel H-section piles and cast-in-place concrete footings. For the pile design several load conditions were evaluated. Pile settlement rates for the different loads were computed and different design strategies evaluated. The conclusion was that piles were inadequate for the main building, but could be used for the boiler house in conjunction with the university. The foundation design for the main building was based on cast-in-place concrete footings. For the boiler house HEB160 steel piles were used. The overall length of the piles was 11 metres in permafrost with spacing between 3 and 4 metres. Slurry design was based on Instanes Consulting Engineers experience with piles in Longyearbyen.
机译：斯瓦尔巴德大学课程（UNIS）于1994年在斯瓦尔巴德州朗伊尔城建造了一座两层半的大学建筑，总占地面积为3.200 m〜2。该建筑位于海岸附近，岩土工程研究表明，多年冻土中的土壤孔隙水盐度从地表5 g / l增加到10米深度的25 g / l。岩土工程研究包括土壤分类，水分含量，孔隙水盐度以及干湿密度的测量。对基础设计的几个概念进行了评估，包括通风的砾石垫，热泵基础，H型钢截面桩和现浇混凝土基础。对于桩的设计，评估了几种载荷条件。计算了不同载荷下的桩沉降率，并评估了不同的设计策略。结论是，桩子不足以容纳主体建筑，但可以与大学一起用于锅炉房。主楼的基础设计基于现浇混凝土基础。对于锅炉房，使用了HEB160钢桩。永久冻土层的总长度为11米，间距为3至4米。泥浆设计基于Instanes咨询工程师在Longyearbyen进行桩桩的经验。

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