无砂垫层真空预压联合水袋堆载法加固超软地基应用研究  

Improvement of Ultra Soft Soil by Vacuum Preloading Combined with Water Bag Method of Sand Free Cushion

作　　者：王海建 杨建贵 曹健勇 田艳梅 彭劼[3] 

机构地区：[1]中交上航局航道建设有限公司,浙江宁波315200 [2]南京市水务工程建设管理中心,江苏南京210017 [3]河海大学土木与交通学院,江苏南京210098

出　　处：《重庆交通大学学报（自然科学版）》2018年第1期66-71,共6页Journal of Chongqing Jiaotong University(Natural Science)

基　　金：国家自然科学基金项目(51578214)

摘　　要：结合实际工程,通过试验研究了无砂垫层真空联合水袋预压法加固超软地基的效果,试验结果表明该方法能够有效提高地基承载力,跟常规的真空预压法比较,加固效果更好,能够增大硬壳层的厚度和土体的有效加固深度;对真空膜面覆水预压法进行了比较、分析,讨论了真空膜面覆水预压法存在的缺陷,特别是在产生"循环水"的情况下该方法的失效性。Combined with the actual project,the effect of ultra-soft foundation reinforced by vacuum combined with water bag preloading method of sand free cushion was studied by the tests. The experiment results show that the proposed method can effectively improve the bearing capacity of foundation. Compared with the conventional vacuum preloading method,the reinforcement effect of the proposed method is better,and it can increase the thickness of the hard shell layer and the effective reinforcement depth of the soil. The vacuum film surface overlying water preloading method was compared and analyzed,and its defects and failure especially in the case of ＂cyclic water＂were discussed.

关 键 词：岩土工程 真空预压 水袋预压 地基承载力 覆水预压 

分 类 号：TU472.33[建筑科学—结构工程]