水平筋形式对水平-竖向加筋砂土强度的影响

上海大学学报(自然科学版) ›› 2011, Vol. 17 ›› Issue (2): 196-202.

水平筋形式对水平-竖向加筋砂土强度的影响

魏伟,张孟喜,张朕磊

上海大学土木工程系，上海 200072

收稿日期:2009-10-30 出版日期:2011-04-30 发布日期:2011-04-30
基金资助:
国家自然科学基金资助项目（50678100,40972192）

Influence of Horizontal Reinforcement Forms on Strength of Sand Reinforced with Horizontal-Vertical Inclusions

WEI Wei, ZHANG Meng-Xi, ZHANG Zhen-Lei

Department of Civil Engineering, Shanghai University, Shanghai 200072, China

Received:2009-10-30 Online:2011-04-30 Published:2011-04-30

摘要/Abstract

摘要：

选用有机玻璃作为加筋材料，针对不同的水平筋形式（带孔、满布）、竖筋高度以及不同围压下的水平-竖向(horizontal-vertical,H-V)加筋砂土,进行100多组平面应变试验.研究不同的水平筋形式对H-V加筋砂土强度的影响，同时验证竖筋高度和围压对强度的影响.试验结果表明,水平筋带孔时，H-V加筋砂土的强度优于满布情况下的强度.这主要是因为孔洞能够将轴向荷载传递给下部土体，使竖筋不会过早破坏，孔洞自身也形成了一种格室效应，增强了土体的强度.同时,孔洞的大小对加筋土体强度也有一定的影响，验证了竖筋高度存在最优值.

关键词: 水平-竖向加筋；平面应变试验；水平筋形式；竖筋高度

Abstract:

More than 100 sets of plane stress tests were carried out on sand reinforced with horizontal-vertical (H-V) inclusions of perspex with different forms of horizontal inclusions (hole and coverage) and different height of vertical inclusions and cell pressure. Effects of the form of horizontal reinforcements on the strength of sands reinforced with horizontal-vertical inclusions were studied. The influence of height of vertical inclusions and confining pressures on strength is validated. The results show that strength of the form with hole is better than that of coverage because the axis load can be transferred to the lower soil, the vertical inclusions did not break earlier, and the form with hole has a cancellus effect which can improve the soil strength. The hole size has some influence on strength. It is verified that height of the vertical inclusion has an optimal value.

Key words: horizontal-vertical (H-V) inclusion; plane stress test; form of horizontal inclusion; height of vertical inclusion

中图分类号:

TU 443

魏伟,张孟喜,张朕磊. 水平筋形式对水平-竖向加筋砂土强度的影响[J]. 上海大学学报(自然科学版), 2011, 17(2): 196-202.

WEI Wei, ZHANG Meng-Xi, ZHANG Zhen-Lei. Influence of Horizontal Reinforcement Forms on Strength of Sand Reinforced with Horizontal-Vertical Inclusions[J]. Journal of Shanghai University（Natural Science Edition）, 2011, 17(2): 196-202.

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