岭澳核电站防波堤块石层防渗墙造孔技术

Holing techniques for constructing impervious wall in the quarrying rock layer of the wave breaker of Ling'ao nuclear power plant

岭澳核电站防波堤是在海中抛填块石、巨石堆积而成的。此类地层中建造混凝土防渗墙在国内外尚属首例。堆石体中巨石多、孔隙大， 槽孔施工易受潮汐和海浪的影响。采用预钻、预灌、预爆、回填碎石等技术措施是造孔成槽的关键。这一特殊处理技术的成功应用， 为今后在同类地层中建造防渗墙提供了有益的经验。

The wave breaker of Ling'ao nuclear power plant is formed by dumping the stone rubble and huge boulder to the sea. The construction of impervious concrete wall in such layer is the first one at home and abroad. Because many huge boulders in such rockfill and big pore space, the groove construction is easily affected by tide and sea wave. The adoption of pre drilling, pre grouting, pre blasting and back filling crushed stone is the key to holing and groove formation. The successful application of such particular treatment technology has provided useful experience for the construction of impervious wall in the similar foundation in future.