土工基础

›› 2014, Vol. 28 ›› Issue (6): 43-46.

• 工程实录 • 上一篇    下一篇

真空联合堆载预压处理深厚软土效果分析

张 红1，张金良1，朱永年1，龚丽飞1,2，朱方方1，吴月龙1   

  1. (1.南京瑞迪建设科技有限公司，南京 210029 ；2.南京水利科学研究院，南京 210029)
  • 收稿日期:2014-01-13 出版日期:2014-12-25 发布日期:2015-01-12
  • 作者简介:张红（1982-），女，硕士，工程师，研究方向为软粘土力学、地基处理方面的设计、研究与施工等。

Effect analysis of vacuum combined with surcharge preloading for deep soft soil

ZHANG Hong1, ZHANG Jinliang1, ZHU Yongnian1, GONG LiFei1,2, ZHU Fangfang1, WU Yuelong1   

  1. (1.Nanjing Ruidi Construction Technology Co., Ltd., Nanjing 210029; 2.Nanjing Hydraulic Research Institute, Nanjing 210029)
  • Received:2014-01-13 Online:2014-12-25 Published:2015-01-12

摘要： 软土由吹填土和原状淤泥质土构成，平均深度为25 m，且表层覆盖回填土层，采用真空联合堆载预压法进行处理。检测结果表明，该场地表层承载力达到100 kPa以上，下部淤泥质土层承载力达到80 kPa，平均沉降153.14~202.79 cm，加固效果非常明显。实践证明，针对该区的深厚淤泥质软土地基，真空联合堆载法具有加固效果好、工期短和施工安全等优点，值得在该地区工程建设中推广应用。

关键词: 真空联合堆载预压, 深厚淤泥软土, 监测与检测, 沉降, 位移, 固结度

Abstract: This paper presents a case history of improvement of thick soft soils by using a combination of vacuum preloading and surcharge methods. The subsurface conditions of the Economic Development Zone of Golan, Zhuhai, consist of hydraulic dredged soils and mucky soils with an average thickness of 25 meters. The soil improvement technique and construction monitoring results are analyzed. The results indicate that the allowable bearing capacity of the surface soil is 100 kPa and the capacity of the deeper soils could be 80 kPa. The average ground settlement of the site varied from 153.14 cm to 202.79 cm. The vacuum preloading combined with surcharge has the characteristics of short construction duration; safe installations, and excellent improvement result.

Key words: Vacuum Preloading Combined with Surcharge, Thick Mucky Soils, Construction Monitoring and Testing, Surface Settlement, Ground Displacement, Degree of Consolidation