This paper reports the dewatering scheme of a deep excavation in sandy pebble strata. The excavation is in high permeability strata and is close to the Yellow River, making the dewatering difficult during construction. At present, few researchers have specially studied the dewatering scheme of deep excavations in strong permeable strata near the water resource. Field pumping test was conducted before the excavation activity, and the permeability coefficient of the strata was obtained by reverse analysis. According to the characteristics of the project, the dewatering scheme of “” was proposed. The influence of vertical waterproof curtain and base grouting on dewatering was analyzed by numerical simulation. In the construction process, the field water table and ground settlement were measured. The results show that (1) the groundwater table versus permeability coefficient curve shows three different stages and (2) the dewatering scheme of “” is effective for deep excavation in strong permeable strata.

中文翻译：

---

黄河沿岸强透水砂卵石地层深井脱水研究

本文报道了砂卵石地层深基坑的脱水方案。开挖地层为高渗透地层，靠近黄河，施工时排水困难。目前，很少有研究人员专门研究水源附近强渗透地层深部开挖的脱水方案。开挖前进行现场抽水试验，通过逆向分析得到地层渗透系数。根据项目特点，“”提出。通过数值模拟分析了竖向防水幕和基层注浆对脱水的影响。在施工过程中，对现场地下水位和地面沉降进行了测量。结果表明：（1）地下水位与渗透系数曲线呈现三个不同阶段；（2）“”对渗透性强的地层深部开挖有效。