岩溶地区桩基施工主要事故通病及质量隐患防治对策

Common Accident of Pile Foundation Construction in Karst Area and the Countermeasures for Quality Hidden Trouble

摘要:

深圳怡龙枫景园桩基工程地处灰岩岩溶地区，累计完成灌注桩364条，最大成桩桩长48 m，最大桩径1.7 m。施工所遇地层复杂，频繁出现偏孔、涌水、漏水、坍塌、桩孔底层溶洞判断及灌注中溶洞洞穿等难题，以科学判断，严密预防，慎重处置，取得了良好的效果。

Abstract:

The paper introduced a pile foundation engineering in limestone karst area, 364 cast-in-place piles were completed with the longest pile of 48m and largest pile diameter of 1.7m. Because of the complex formation, hole deflection, water inrushing, leakage and collapsing often occurred, and it was difficult to estimate the cave at the bottom of the pile hole and cave-penetrating. The difficulties were overcome by scientific judgment, strict prevention and careful treatment.