真空预压法及真空-堆载联合预压法的室内试验研究

›› 2005, Vol. 26 ›› Issue (S2): 103-106.

真空预压法及真空-堆载联合预压法的室内试验研究

彭吉力，刘汉龙，丰土根，Ali Hasson

河海大学岩土工程研究所，南京 210098

收稿日期:2005-05-04 发布日期:2005-12-16
作者简介:彭吉力，男，1971年生，博士，从事桩基础及软基处理研究工作。
基金资助:
国家自然科学基金资助项目（No.50379010）。

Laboratory test of vacuum preloading and vacuum combined surcharge preloading

PENG Jie, LIU Han-long, FENG Tu-gen, Ali Hasson

Geotechnical Engineering Institute, Hohai University, Nanjing 210098, China

Received:2005-05-04 Published:2005-12-16

摘要/Abstract

摘要： 通过室内试验，研究了试样在模拟的堆载预压、真空预压、真空-堆载联合预压以及各向等压4种情况下土体的固结变形特性。结果表明，在真空预压模拟试验情况下，试样的变形、加固情况等指标与各向等压模拟试验下的情况很接近，即：试样的竖向变形小于堆载预压模拟试验情况下试样的竖向变形，土性改善程度要优于堆载预压的情况。而真空-堆载联合预压模拟情况下，试样的竖向变形大于真空预压的情况，加固效果好于堆载预压的情况，总体上具有更好的加固效果。

关键词: 室内试验, 真空预压, 真空-堆载联合预压, 固结

Abstract: Four kinds of laboratory experiments, those are vacuum preloading, surcharge preloading, vacuum combined surcharge preloading and each direction equal loading, were made to study the consolidation character of soil. The result shows that the deformation and improvement of soil of vacuum preloading is more close to that of each direction equal loading. The vertical deformation of vacuum preloading sample is smaller than that of surcharge preloading; and the improvement degree of soil under vacuum preloading is better than that under surcharge preloading. The vertical deformation of vacuum combined surcharge preloading sample is larger than that of vacuum preloading; and the improvement degree of soil of vacuum combined surcharge preloading is better than that of surcharge preloading. As a whole, the vacuum combined surcharge preloading is most effective to improve the soft soil.

Key words: laboratory test, vacuum preloading, vacuum combined surcharge preloading, consolidation

中图分类号:

TU 473

彭吉力，刘汉龙，丰土根，Ali Hasson. 真空预压法及真空-堆载联合预压法的室内试验研究[J]. , 2005, 26(S2): 103-106.

PENG Jie, LIU Han-long, FENG Tu-gen, Ali Hasson. Laboratory test of vacuum preloading and vacuum combined surcharge preloading [J]. , 2005, 26(S2): 103-106.

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