抛石、柴排和第四系沉积层成桩工艺方法与探索

Exploration of Pile Formation Process in Mattress, Riprap and the Quaternary Sedimentary Layer

摘要:

上海某炼油厂拟在黄浦江边码头施工可系万吨油轮的系缆墩，系缆墩采用钻孔灌注桩。在江面施工过程中遇到潮汐、抛石、柴排、漏浆和涌水等施工难题，导致工期和工程费用均用去2/3时施工仍没有取得突破性进展。经过研究探索，采用冲抓、粘土造壁、跟管和回转钻进相结合的工艺方法，成功地解决抛石层、柴排层、第四系沉积地层的成孔问题和抛石层漏失混凝土浆液问题，圆满完成施工任务。

Abstract:

Near Huangpu river wharf, a mooring dolphin for 10000 Tons oil tanker was planed to build by an oil refinery of Shanghai, which would be constructed with bored grouting piles. Tide, riprap, mattress, mud leakage and water gushing were experienced during the construction process. Through research and exploration, by the combination of grab, clay wall building, drilling with casing and the rotary drilling method, the difficult problems of boring in riprap, mattress and the quaternary sedimentary layer were successfully overcome with completion of the construction task.