水泥土搅拌桩施工工艺优化现场试验研究

水泥土搅拌桩强度主要影响因素包括组分配比、桩身水泥含量及均匀性、施工工艺等因素.本文通过对沿海某一高速公路工程的水泥土搅拌桩质量的检验,水泥搅拌桩质量最大的问题是水泥含量不均匀,存在明显的水泥团块,其主要原因是由施工工艺不合理造成的.水泥搅拌桩水泥含量不均匀通过将原先的喷浆搅拌施工改为喷粉搅拌施工,同时将二喷四搅的施工工艺改为三喷六搅,水泥搅拌桩质量有了较大提高,达到了设计要求.

Test Study on Construction Technology Improvement for Cement-soil Mixed Pile

The magor factors of strength of cement-soil mixed pile include mixture ratio of component,cement content,cement uniformity of pile body and construction technology.By means of quality inspection of cement-soil mixed pile of coastal express highway engineering,the main reason of disqualification for the pile is the irrational construction technology,which results in the existence of plenty of cement block mass and cement nonuiformity.The cement nonuiformity of pile is improved greatly by substituting spraying cement power for cement paste,and by substituting three-spray and six-mix of construction technology for two-spray and four-mix.The quality of cement-soil mixed pile meets the demand of design.