土工合成材料与模块砌块连接荷载的实验评估

IF 4.7 1区 工程技术 Q1 ENGINEERING, GEOLOGICAL
F.H.M. Portelinha , P.V.C. Figueiredo , J.G. Zornberg
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引用次数: 0

摘要

带砌块面层的分段式土工合成材料机械加固墙的设计通常受面层与土工合成材料连接处产生的荷载影响。然而,目前对这种连接荷载的作用机理的了解充其量只能说是不全面的。本研究开发的测试设备可以模拟土工合成材料加固土墙的面层应力传递,并评估面层连接荷载。本研究评估了土工格栅钢筋与模块化混凝土砌块之间摩擦连接的连接荷载。在土工合成材料加固的单元单元中,实施了一个综合仪器程序,以捕捉横向土压力、土工合成材料应变和作用于土工格栅-砌块连接处的荷载,该单元单元受到递增附加荷载阶段的影响。结果表明,基于土压力理论的传统计算可能会低估面层连接荷载,主要是当连接荷载是由回填土相对于块体面层的差异沉降引起时。当这种机制在连接处的动员中占主导地位时,加固荷载会随着差异沉降的增加而增加,在土工格栅和模块砌块之间的连接处产生向下拖拽力。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Experimental evaluation of geosynthetic-modular block connection loads

The design of segmental geosynthetic mechanically stabilized walls with masonry block facing is often governed by the loads that develop at the connection between the facing and geosynthetic. Yet the current understanding of the mechanisms involved in the mobilization of such connection loads is, at best, incomplete. The testing apparatus developed as part of this study facilitates simulating the transference of stresses at the face and evaluating the facing connection loads in geosynthetic-reinforced soil walls. This study assesses the connection loads between a geogrid reinforcement connected frictionally to modular concrete blocks. A comprehensive instrumentation program was implemented to capture lateral earth pressures, geosynthetic strains and loads acting at the geogrid-block connection in a geosynthetic-reinforced unit cell subjected to incremental surcharge stages. Results indicate that conventional calculations, based on earth pressure theory, may underestimate the facing connection loads, mainly when the connection loads are triggered by the differential settlement of the backfill relative to the block facing. When this mechanism dominates the mobilization at the connection, reinforcement loads increase as the differential settlement increases, developing down-drag forces at the connection between the geogrid and modular blocks.

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来源期刊
Geotextiles and Geomembranes
Geotextiles and Geomembranes 地学-地球科学综合
CiteScore
9.50
自引率
21.20%
发文量
111
审稿时长
59 days
期刊介绍: The range of products and their applications has expanded rapidly over the last decade with geotextiles and geomembranes being specified world wide. This rapid growth is paralleled by a virtual explosion of technology. Current reference books and even manufacturers' sponsored publications tend to date very quickly and the need for a vehicle to bring together and discuss the growing body of technology now available has become evident. Geotextiles and Geomembranes fills this need and provides a forum for the dissemination of information amongst research workers, designers, users and manufacturers. By providing a growing fund of information the journal increases general awareness, prompts further research and assists in the establishment of international codes and regulations.
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