烧料礓石改良土加固古遗址土城墙研究  

Study on Ancient Ruins Earthen City Wall Reinforced by Improved Soil with Calcined Ginger Nuts

作　　者：李琦峰 孔垂鹏 党冰 彭尔兴 胡晓莹 侯铮 LI Qifeng;KONG Chuipeng;DANG Bing;PENG Erxing;HU Xiaoying;HOU Zheng(The Third Institute of Geology and Minerals Exploration,Gansu Provincial Bureau of Geology and Minerals Exploration and Development,Lanzhou 730050,China;Northwest Institute of Eco-environment and Resources,CAS,Lanzhou 730000,China;Lanzhou University of Technology,Lanzhou 730050,China)

机构地区：[1]甘肃省地矿局第三地质矿产勘查院,兰州730050 [2]中国科学院西北生态环境资源研究院,兰州730000 [3]兰州理工大学,兰州730050

出　　处：《路基工程》2022年第3期10-17,共8页Subgrade Engineering

基　　金：国家自然科学基金青年基金项目(41901079)。

摘　　要：以临潭县牛头城古遗址城墙维修与保护工程为依托,采用现场调查和室内试验确定遗址土和含烧料礓石夯筑用土的相关力学参数,并利用强度折减法和有限元分析软件ABAQUS研究烧料礓石加固土遗址后的应力-应变分布及安全系数变化规律。结果表明:采用低掺量烧料礓石改良土夯筑加固后的古遗址土城墙塑性应变区域发展得到明显遏制;对土遗址城墙中部风蚀和底部风蚀加固后遗址土城墙模型的稳定安全系数有明显提高,其加固7天后稳定安全系数分别为1.959和1.820,夯筑14天后的模型稳定安全系数分别为1.966和1.829。研究的结果可为烧料礓石夯筑土的实际工程应用提供理论依据。Based on the maintenance and protection project of Niutoucheng ancient sites wall in Lintan County,field investigation and laboratory test were used to determine the relevant mechanical parameters of the relics soil and the rammed soil with calcined ginger nuts.The stress-strain distribution and the variation of safety factor were studied by strength reduction method and finite element analysis software ABAQUS.The results show that the development of plastic strain area of the ancient ruins earthen city wall rammed and reinforced by improved soil with low content of calcined ginger nuts is obviously restrained,the stability safety factor of the model is significantly improved after the wind erosion in the middle and bottom of the wall,and the stability safety factors of the model after 7 days of reinforcement are 1.959 and 1.820 respectively,and those of the model after 14 days of ramming are 1.966 and 1.829 respectively.The results of the study can provide a theoretical basis for the practical engineering application of the rammed soil with calcined ginger nuts.

关 键 词：古遗址风蚀土城墙加固 烧料礓石改良土 礓石掺量 抗剪强度 养护时间 稳定性数值模拟 强度折减系数 安全系数 

分 类 号：TU457[建筑科学—岩土工程]