某泵站工程桩基水平荷载试验研究

Experimental Study on Horizontal Load of Pile Foundation in a Pumping Station

以水利工程泵站为例子,在场地开展了泵站施工桩基水平荷载试验,对桩体受到水平力时的变形特点进行了研究和分析,研究结果表明:此场地将水平位移最大值定为6 mm是十分合理和安全的,除此之外,设计时选取位移控制和选取水平承载力控制相比,前者更加科学合理;桩的力学响应因为各自位置和离坡脚远近的不同而表现出较大的差异,呈现出水平承载力随坡脚距离的减小而增大;垂直分力作用于边坡土体上,会使桩身受到比较高的球应力,在一定程度上提高了整体的抵抗能力;土质边坡有着均匀性的特征,和岩质边坡坡体结构鲜明的方向性特征相比有很大差异。

Taking the hydraulic engineering pumping station as an example, the horizontal load test of pile foundation in the site of pumping station construction is carried out in this paper. The deformation characteristics of the pile body under the horizontal force are studied and analyzed. The results show that it is very reasonable and safe to set the maximum horizontal displacement of 6mm in the site. In addition, it is more scientific and reasonable to select the displacement control and the horizontal bearing capacity control. The mechanical responses of piles varies greatly due to the different position and distance from the foot of the slope, showing that the horizontal bearing capacity increases with the decrease of the distance from the foot of slope. When the vertical component force acts on the slope soil, the pile will be subjected to relatively high spherical stress, which improves the overall resistance ability to a certain extent. The soil slope has the characteristic of uniformity, which is quite different from the rock slope in the directional characteristic which the rock slope body structure is distinct.