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山东聊城某造纸厂碱回收工程,桩基采用φ426、长8.5m 沉管夯扩桩,要求单桩竖向承载力标准值达到550kN。施工完毕后,做几组静载试验,其承载力均满足设计要求,而小应变检测结果则表明部分桩浅部(一般在2m 左右,个别桩在3.5 m 部位)存在不同程度的缺陷。为对基础工程质量全面负责,决定对所有桩
In the alkali recovery project of a paper mill in Liaocheng, Shandong, pile foundations are φ426 and 8.5m long immersed rammed piles. The standard value of the vertical bearing capacity of a single pile is 550kN. After the completion of the construction, several groups of static load tests are performed, and their bearing capacity meets the design requirements. The results of the small strain test indicate that there are defects in the shallow part of the pile (generally about 2 m and individual piles at 3.5 m). In order to take overall responsibility for the quality of foundation projects, it was decided to