Based on a pit project case, this passage introduced expounded the overlap method and the key point of construction quality control- ling of the triaxial cement-mixed pile waterproof curtain, expounded double piped high pressure jet grouting pile which was used as a cold joint coping method about triaxial cement-mixed pile waterproof curtain. Through project practice, the waterproof effection of triaxial cement-mixed pile and the feasibility of high pressure jet grouting pile as a cold joint coping was verified.%结合基坑工程实际，介绍了三轴水泥搅拌桩止水帷幕在施工中的搭接方法、施工质量控制要点，阐述了双管高压旋喷桩对于三轴水泥搅拌桩止水帷幕的冷缝处理方法，并通过工程实践，验证了三轴水泥搅拌桩的止水效果以及高压旋喷桩对冷缝处理的可行性。
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