某工程灌注桩承载力不足成因分析及处理措施

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DOI：10.19981/j.CN23-1581/G3.2026.11.013

中图分类号：TU753.3

文献标志码：A

文章编号：2095-2945（2026）11-0060-05

Abstract： Bored cast-in-place piles， as commonly used core load-bearing foundations in construction engineering， their compressive bearing capacity directly determines the overall stability， safety， and durability of the structure. Geological survey errors， improper construction techniques， and material quality defects are the three core factors leading to insufficient pile bearing capacity. Taking a park project in Xiaoyangshan of Zhejiang Province as the research object， this paper first conducted static load tests on 12 test piles， among which the ultimate compressive bearing capacity of 9 test piles failed to meet the design requirements. To further explore the causes of insufficient bearing capacity of the test piles， drilling core sampling method was adopted for verification on the 12 test piles. The results show that the interface between the soil layer and bedrock features significant undulation. Specifically， the pile ends of 5 test piles failed to reach the bearing stratum; the pile ends of 4 test piles penetrated the bearing stratum but the stratum contained weak interlayers; the saturated uniaxial compressive strength of the rock beneath 4 test piles was lower than the standard value; and the concrete strength of the pile shafts of 10 test piles failed to meet the design requirements.

Keywords： bored cast-in-place pile; insufficient bearing capacity; static load test; bored core method; saturated rock uniaxial compressive strength

钻孔灌注桩凭借其承载力高、沉降量小、稳定性强等优势，广泛应用于高层建筑、桥梁工程、港口码头等重大基础设施建设中，其抗压极限承载力是衡量桩基工程质量的关键指标。（剩余3323字）