2017年4月下施工技术 第46卷第8期CONSTRUCTIONTECHNOLOGY41 DOI:10. 7672/sgjs2017080041
广东江河冲积地质SMW工法桩水泥土强度试验研究 郑仲园"，何春保"，曾祥月，麦嘉柱"，梁梓豪"，王金龙²，谢毅洋3 (1.华南农业大学水利与土木工程学院，广东广州510642；2.中国科学院武汉岩土力学 研究所，湖北武汉430071；3.东莞市华科建筑科技有限公司，广东东莞523123）
【摘要】为研究SMW工法桩在广东江河冲积地质淤泥质黏土和粉细砂中的成桩性状，通过现场取样测得水泥土强 限抗压强度。
试验结果表明：淤泥质黏土水泥土和粉细砂水泥土最佳水灰比均为1.5；淤泥质黏土水泥土在水泥掺 人比为18%时强度最高，粉细砂水泥土在水泥掺人比为15%时强度最高，粉细砂与水泥结合的机理与水泥砂浆相 似，随砂灰比的增大而增大；水泥土强度随龄期的增长面增长，且在最佳水泥掺人比时28d后强度增长明显；水泥 土干密度与抗压强度呈正相关；最后分析了现场水泥土强度比实验室内水泥土强度小的原因，结果可以为改进 SMW工法桩施工工艺提供参考。
[关键词]SMW工法桩；水泥土；无侧限抗压强度；干密度；淤泥质黏土；试验；研究 [中图分类号]U451[文献标识码】A[文章编号]1002-8498(2017)08-0041-05 Experimental Study onSoil-cementStrength ofSMWMethod Pile in GuangdongRiver Alluvial Geology ZHENG Zhongyuan',HE Chunbao'，ZENG Xiangyue',MAI Jiazhu',LIANG Zihao', WANG Jinlong²,XIE Yiyang? （1.CollegeofWater Conserancy and Civil Enginering,SouthChinaAgriculturalUniversity,Guangzhou，Guangdong 510642,China; 2.Institute of Rock and Soil Mechanics，Chinese Academy of Sciences，Wuhan,Hubei 430071, China; 3.Dongguan Huake Architectural Technology Co.，Lud.,Donguan,Guangdong 523123,China) Abstract : In order to study the quality of SMW method pile in Guangdong river alluvial geological mucky clay soil and fine sand, the strength and dry density of soil-cement on site is measured. Changing three kinds of water-cement ratio and four kinds of cement content for specimens in laboratory,and unconfined pressive strength at 28, 60, 90d and 120d are measured. The results show that the most suitable water-cement ratio of mucky clay soil-cement and fine sand soil-cement is 1.5.The highest strength of mucky clay soil-cement is cement content 18% and fine sand soil-cement is cement content 15%.The bination mechanism of fine sand and cement is similar to cement mortar, increaseing with the increase of sand-cement ratio. The strength of soil-cement grows along with the curing time and increases obviously after 28d in the optimum cement content. Soil-cement dry density exists a positive correlation with press...
