真空联合堆载预压法负面效应分析

›› 2006, Vol. 27 ›› Issue (S2): 865-869.

真空联合堆载预压法负面效应分析

刘吉福^1,2

1.华南理工大学，广州 510640；2.广东省航盛建设集团有限公司，广州 511442

收稿日期:2006-07-12 发布日期:2006-12-16
作者简介:刘吉福，男，1971年生，高级工程师，主要从事公路软基处理施工、监测、科研等工作

Study of negative effects of method of preloading with vacuum and surcharge

LIU Ji-fu^1,2

1. South China University of Technology, Guangzhou 510640, China; 2. Guangdong Province Hangsheng Engineering Co. Ltd. Guangzhou 511442, China

Received:2006-07-12 Published:2006-12-16

摘要/Abstract

摘要： 虽然真空联合堆载预压法具有许多优点，但是它也有一些负面效应。首先，由于真空卸除后地基土的不排水抗剪强度降低可能导致路基失稳，这种情况尤其可能出现在填土在很多时间内快速填筑完毕且真空马上卸除的时候。其次，由于真空卸除后地基土压缩模量降低可能导致工后沉降增大，特别是当真空卸除后马上施工路面的情况下容易出现上述情况。真空联合堆载预压法的其他负面效应如周围地面沉降和开裂在其他文献中已有报道。

关键词: 真空联合堆载预压法, 负面效应, 失稳, 工后沉降

Abstract: Although the preloading method with vacuum and surcharge has many advantages, but it also has some negative effects. Firstly, it may lead to instability of embankment especially when fill is constructed in a short period and vacuum is unloaded immediately after finishing of surcharge because the undrained shear strength will decline with the unloading of vacuum. Secondly, it may lead to more settlement after construction especially when pavement is constructed immediately after unloading of vacuum for the value of compression modulus will decline with the unloading of vacuum. Other negative effects such as cracking and settlement of ground near the improvement zone have been reported in other papers already.

Key words: preloading method with vacuum and surcharge, negative effect, instability, settlement after construction

中图分类号:

TU434

刘吉福 , . 真空联合堆载预压法负面效应分析[J]. , 2006, 27(S2): 865-869.

LIU Ji-fu , . Study of negative effects of method of preloading with vacuum and surcharge[J]. , 2006, 27(S2): 865-869.

参考文献

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