块式机械稳定E型土墙弯曲截面配筋区特性的场测量研究

IF 0.4 Q4 ENGINEERING, GEOLOGICAL Journal of the Korean Geosynthetic Society Pub Date : 2019-01-01 DOI:10.12814/JKGSS.2019.18.2.023
Lee Soyen, Young-Je Kim, D. Oh, Y. Lee, Hyuk-sang Jung
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引用次数: 1

摘要

本文对块式机械稳定土(MSE)墙体弯曲截面进行了现场实测,并通过实测结果对弯曲部分的加固面积进行了研究。MSE法由于施工简便、经济效益优异,已被广泛应用于各个领域,在我们的生活中得到了广泛的应用。然而,由于缺乏压实和应力集中现象,MSE墙体曲线出现裂缝和倒塌,这对安全至关重要。导致坍塌的原因主要有:对曲线断面研究不足、设计规范缺乏、施工考虑经济性和缩短工期不足、压实空间不足等。因此,本研究对现有的设计和施工标准进行了审查,并通过砌块式MSE墙体弯曲截面的事故实例分析了原因。结果表明,弯曲截面的水平位移比直线截面高90%,比凹截面高60%。对于弯曲截面加固区域的凸截面,从MSE墙中心向水平方向的H/2截面显示最大位移,并显示H的影响范围。在凹截面情况下,最大位移显示在中心,最小位移确定在H/4截面从MSE壁中心向水平方向。通过砌块式MSE墙体的实际施工对加固区域进行修复的基础研究,对其直线部分和弯曲部分的性能进行了比较分析。并对加固区域进行了分析,以减少应力集中现象的破坏,确保安全。
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A Study on Behavior Characteristics of Reinforcement Zone of Block Type Mechanically Stabilized E arth Wall by F ield Measurement in Curved Section
In this paper, field measurement of the Block Type Mechanically Stabilized Earth (MSE) wall curved section was performed, and the reinforced area of the curved part is studied through the result. MSE method has been applied to various fields because of easy construction and excellent economic efficiency, so that it can be easily access in our life. However due to lack of compaction and stress concentration phenomenon, cracks and collapse occur in the curve of MSE wall, which is important for safety. The cause of collapse is lack of research on curved section, lack of design criteria, lack of construction due to economical efficiency and shortening of construction period, insufficient compaction space. In this study, therefore, it was examined the existing design and construction standards, analyzed the cause through accident examples of the curved section of the Block Type MSE wall. As a result, the horizontal displacement of the curved section was 90% higher than that of the straight section and 60% higher than that of the concave section. In the case of the convex section in the curved section reinforcement region, the maximum displacement is shown in the H/2 section in the horizontal direction from the center of the MSE wall, and the range of influence from H is shown. In the case of the concave section, the maximum displacement is shown in the center, The minimum displacement was confirmed in H/4 section in the horizontal direction from the center of the MSE wall. As a basic study on the reinforcement area rehabilitation through the actual construction of block type MSE wall, the behaviors of the straight part and the curved part were compared and analyzed. And analyzed the reinforced area in order to reduce the damage of the stress concentration phenomenon and secure the safety.
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