水利工程单桩竖向抗压静载试验研究

Experimental Study on Vertical Compressive Static Load of Single Pile in Water Intake Pumping Station

以取水泵站为例研究水利工程基桩在竖向荷载作用下的受力特性和沉降特点,对典型基桩进行单桩抗压静载试验,明确了试验装置、加载方式、加载方法、判定方法,确定了单桩竖向抗压承载力特征值,判断了检测结果是否满足设计要求,为水利工程基桩设计及优化提供借鉴。结果表明:此场地单桩竖向抗压承载力特征值是十分合理和安全的,选取3根基桩竖向承载力桩端阻力所占比例不高,呈现为Q-s“缓变型”曲线,破坏特征点不明显。

Taking water intake pumping station as an example,the mechanical characteristics and settlement characteristics of hydraulic engineering foundation piles under vertical loads were studied.A single pile compressive static load test was carried out on a typical foundation pile,and the test device,loading method,and judgment method were defined.The characteristic value of the vertical compressive bearing capacity of a single pile was determined,and whether the test results met the design requirements was reviewed.It provides reference for the design and optimization of pile foundation of hydraulic engineering.The research results show that the characteristic value of vertical compressive capacity of single pile in this site is very reasonable and safe.The proportion of tip resistance of the selected 3 foundation piles in vertical bearing capacity is not high,showing a Q-s"slow change"curve,and the failure characteristic points are not obvious.