素土挤密桩在某均质土坝段地基处理中的应用  

Application of Plain Soil Compaction Pile in Foundation Treatment of a Homogeneous Earth Dam Section

作　　者：周延国 张彩双 王勇鑫 ZHOU Yanguo;ZHANG Caishuang;WANG Yongxin(Yellow River Engineering Consulting Co., Ltd., Zhengzhou 450003, China)

机构地区：[1]黄河勘测规划设计研究院有限公司,河南郑州450003

出　　处：《水电与新能源》2022年第6期1-3,38,共4页Hydropower and New Energy

摘　　要：莲花寺水库均质土坝段地基为中、高压缩性的湿陷性黄土,水库蓄水后坝基存在湿陷、压缩引起的附加沉降,对坝体结构稳定不利。工程采取了素土挤密桩的地基处理措施,经计算和现场试桩确定了桩间距,素土挤密桩使坝基土体提升了密实度、降低了压缩性、提高了承载能力,处理效果满足了本工程对土体压缩、湿陷性要求。The foundation of the homogeneous earth dam section of Lianhuasi Reservoir is collapsible loess with medium and high compressibility.The additional collapse and compression settlement of the foundation after the impoundment of the reservoir will seriously affect the stability of the dam structure.Thus,the plain soil compaction pile is adopted in the foundation treatment.The pile spacing is determined by calculation and in-situ pile test.It shows that the plain soil compaction pile improves the compactness of the foundation soil,reduces the compressibility and increases the bearing capacity.After the treatment,the requirements on the soil compressibility and collapsibility are satisfied.

关 键 词：坝基 湿陷黄土 素土挤密桩 桩间距 挤密系数 

分 类 号：TV64[水利工程—水利水电工程]