多头搅拌桩结合高压旋喷桩施工技术在深基坑防渗帷幕中的应用

Application of multi-head stirring pile and high-pressure spraying pile in construction of seepage proof curtain of deep foundation pit

介绍多头搅拌桩和高压旋喷桩的施工原理,提出采用多头搅拌桩结合高压旋喷桩进行防渗帷幕施工的方法,并在九圩港二线船闸工程中进行了应用。根据实际应用,对两种工法施工的质量效果、工程造价及施工工效进行分析和对比。结果表明:两者施工的墙体均能满足防渗要求,多头搅拌桩在经济性、工效性方面更具优势,其工程适应性相对较差。基于两者特性,认为多头搅拌桩结合高压旋喷桩的施工工艺将会广泛应用于各类截渗工程。

This paper introduces the construction principle of multi-head stirring pile and high-pressure spraying pile, and proposes a method which combines the multi-head stirring pile with high-pressure spraying pile in seepage engineering construction, which was used in the seepage proof curtain of Jiuwei port second-line ship lock project. According to the actual application, we compare the quality effect, construction cost and construction efficiency of the two construction methods.The results show that both of them can meet the requirement of seepage control, but multi head mixing pile has more advantages in economy and work efficiency, and its engineering adaptability is relatively poor. Based on the two characteristics, the construction technology which combines multi head mixing pile with high pressure spraying pile will be widely used in various types of seepage engineering.