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首页> 外文期刊>International journal of geotechnical engineering >Load transfer of pile foundations in frozen and unfrozen soft clay
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Load transfer of pile foundations in frozen and unfrozen soft clay

机译：冷冻和联接软粘土中的桩基础的负载转移

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This paper investigates load-carrying capacity of two conventional and three helical piles in frozen soft clay and evaluates the changes in pile capacity corresponding to ground thawing. In-situ pile load tests were conducted in frozen and unfrozen Leda clay and used to establish stress-strain correlations to describe the load transfer of the test piles. The stress-strain correlations in frozen ground were favourably comparable within the small strain region. As the load was increased, however, the helical pile reached an adfreeze capacity of 1650 kPa followed by accelerated displacement. The smooth-shafted piles, in contrast, continued to withstand the applied loads because of their larger contact areas. The ultimate pile capacities were significantly decreased following ground thawing recording around 90% lower capacities. The load-carrying behavior of helical piles was dominated by their end bearing; therefore, it was important to drive the helical pile to a sufficient depth to ensure that the helix is located within the permanent frozen profile.
机译：本文研究了两个常规和三个螺旋桩中的载荷容量，在冷冻的软粘土中，评估对应于地面解冻的桩容量的变化。原位桩载荷试验是在冷冻和未冷却的LEDA粘土中进行的，并用于建立应力 - 应变相关性，以描述测试桩的负载转移。冷冻地的应力 - 应变相关性在小应变区内有利地相当。然而，随着载荷增加，螺旋桩达到了1650 kPa的Adfreeze容量，然后加速位移。相比之下，光滑轴承桩由于其较大的接触区域而继续承受施加的负载。在地面解冻录制下，最终桩容量显着降低了90％的容量。螺旋桩的承载行为由其端轴承主导;因此，将螺旋桩驱动到足够的深度是重要的，以确保螺旋位于永久冷冻型材内。

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