摘要
皇城台护墙是石峁皇城台的重要组成部分,也是保证皇城台安全的关键,目前护墙灰缝材料风化严重且存在一定外倾变形,急需对其稳定性进行评估。通过理论推导得出了适合皇城台护墙稳定性计算公式,通过室内试验验证了公式的准确性,分析了高宽比、灰缝强度和竖向外荷载对护墙稳定性的影响。研究结果表明:护墙为内部松散的重力式挡墙,存在沿内部灰缝滑移和倾覆两种破坏类型,倾覆破坏时的倾覆角度和墙体高度、灰缝强度等多种因素相关;护墙灰缝强度相同时,在护墙底部稳定性系数最小,最易发生倾覆破坏;护墙稳定性随着高宽比及竖向外荷载增加、灰缝强度减小而降低。研究结果为石峁皇城台护墙的稳定性评估和加固提供科学依据。
The Huangchengtai retaining wall is an important part of Shimao Huangchengtai and the key to ensuring the safety of Huangchengtai.At present,the mortar joint material used for the retaining wall is seriously weathered and has a certain inclination deformation,so it is urgent to evaluate its stability.Through a theoretical analysis,a formula suitable for calculating the stability of the retaining wall of Huangchengtai was derived.The accuracy and applicability of the formula were verified by laboratory tests.The influences of the ratio of height to width,the mortar joint strength and the vertical external load on the stability of the retaining wall were analyzed.The results show that the retaining wall was a gravity retaining wall with a loose interior,and that there were two types of failure:sliding and overturning along the internal cracks.The overturning angle was related to many factors,such as the wall height and mortar joint strength.When the mortar joint strengths were the same,the stability coefficient at the bottom of the retaining wall was the smallest—the most prone to overturning.The stability of the retaining wall decreased with the increase of height-width ratio and vertical external load,and with the decrease of mortar joint strength.This study could provide a scientific basis for the stability assessment and reinforcement of the retaining wall of Shimao Huangchengtai.
作者
秦立科
韦坤
王磊
庞磊
王猛
QIN Like;WEI Kun;WANG Lei;PANG Lei;WANG Meng(School of Architecture and Civil Engineering,Xi’an University of Science and Technology,Xi’an 710054,China;Geotechnical Relics and Heritage Conservation Institute,Xi’an University of Science and Technology,Xi’an 710054,China;Shaanxi Provincial Institute of Cultural Heritage,Xi’an 710075,China;Northwest Nonferrous Survey Engineering Company,Xi’an 710038,China)
出处
《文物保护与考古科学》
北大核心
2025年第1期122-132,共11页
Sciences of Conservation and Archaeology
基金
国家自然科学基金项目(51174159)资助
陕西省自然科学基础研究计划项目(2017JQ5069)资助。
关键词
石峁遗址
皇城台
护墙
破坏类型
稳定性分析
Shimao site
Huangchengtai
Retaining wall
Type of failure
Stability analysis
