锚桩堆载联合静载试验在工程中的应用

Application of Anchor Pile Stack Joint Static Load Test in the Engineering

依托某钢筋混凝土钻孔灌注桩基础工程,根据场地条件,选取核心筒下的一根桩做静载试验桩,以周边的4根工程桩作为试验锚桩。根据勘察资料,为满足试验单根桩极限上拔力不超过5 000 k N,桩顶上拔位移<15 mm,静载试验最大加载32 000k N(超过锚桩提供的反力),采用锚桩堆载联合加载法进行单桩竖向抗压承载力检测,确保后期正常工作。

Based on certain reinforced concrete bored pile foundation engineering in a district, this article selected the core tube under a pile static load test pile according to the site conditions, and took four engineering piles as anchor piles. According to survey data, in order to meet the conditions of test on single pile ultimate bearing capacity does not exceed 5 000 kN, the displacement of pile top is less than 15 mm, the maximum load of the static load test of 32 000 kN （more than the reaction force of anchor pile）, so the anchor pile load combined loading method was adopted to improve the bearing capacity of single pile vertical compressive static load test, to ensure normal work of the late.