干旱区线性夯土遗址径流型冲沟影响因素

兰州理工大学学报 ›› 2020, Vol. 46 ›› Issue (1): 144-151.

干旱区线性夯土遗址径流型冲沟影响因素

崔凯^1,2,3, 王冠众^1,3, 王东华^1,3, 王泽林^1,3

1.兰州理工大学甘肃省土木工程防灾减灾重点实验室, 甘肃兰州 730050;
2.兰州大学西部灾害与环境力学教育部重点实验室, 甘肃兰州 730000;
3.兰州理工大学西部土木工程防灾减灾教育部工程研究中心, 甘肃兰州 730050

收稿日期:2018-08-22 出版日期:2020-02-28 发布日期:2020-06-23
作者简介:崔凯(1980- ),男,博士,副教授,博导.
基金资助:
国家自然科学基金(52108245,41562015),教育部长江学者创新团队支持计划项目(2017IRT_17R51)

Influencing factors upon runoff-type gully on linearly rammed earth ruins in arid area

CUI Kai^1,2,3, WANG Guan-zhong^1,3, WANG Dong-hua^1,3, WANG Ze-lin^1,3

1. Key Laboratory of Disaster Prevention and Mitigation in Civil Engineering of Gansu Province, Lanzhou Univ. of Tech. , Lanzhou 730050, China;
2. Key Laboratory of Disaster and Environment Mechanics in Western China; The Ministry of Education, Lanzhou University, Lanzhou 730000, China;
3. Western Research Center of Disaster Prevention and Mitigation in Civil Engineering, The Ministry of Education, Lanzhou Univ. of Tech. , Lanzhou 730050, China

Received:2018-08-22 Online:2020-02-28 Published:2020-06-23

摘要/Abstract

摘要： 为了深入研究夯土遗址径流型冲沟病害的发育机理与科学防治方法,展开径流型冲沟发育活跃程度的影响因素研究.选择具有相同赋存区域、时代和工艺属性、分布于研究区的线性夯土遗址明长城为研究对象,通过对17处明长城1 km长度遗址上冲沟的数量和形态特征的调查统计,提出表征一个地区冲沟发育活跃程度的特征值冲沟线性密度和收缩率.利用回归分析法筛选出崩解速率、液性指数、黏聚力、年均降雨量、年均日极端降雨量和年均气温日较差作为主要影响因素.最后,通过熵权灰色关联法建立影响因素评价模型,得到系统内的影响因素关联大小为崩解速率>液性指数>黏聚力>年均气温日较差>年均降雨量>年均日极端降雨量.在西北干旱区夯土遗址径流型冲沟发育过程中,夯土自身因素的影响比环境因素影响更为显著.

关键词: 夯土遗址, 径流型冲沟, 发育特征值, 熵权法, 灰色关联

Abstract: In order to investigate deeply the developmental mechanism and scientific prevention-cure method of the disease in the runoff-type gully on rammed earth ruins, the investigation of the factors of influence upon the activity of the runoff-type gully development is carried out. Therefore, by means of selecting the Great Wall of Mingdynasty with linear by rammed earth ruins, which has identical zone of preservation, era-technique attribution, and distribution of investigation, as investigation object and conducting the survey and statistics of the quantity and modal feature of the gully on the ruins with length of 1 km at 17 sites of Ming dynasty Great Wall, the linear density and shrinkage rate of the gully as its eigenvalues for characterization of activity of gully development at an area are presented. Then, the disintegration rate, liquidity index, cohesive force, annual average rainfall, annual average daily extreme rainfall, and annual average temperature diurnal variation as main influence factors are screened with regression analysis method. Finally, the evaluation model established by means of entropy weight and gray correlation method and it is found that the magnitude sequence of influence factors will be disintegration rate > liquidity index > cohesion force > annual average temperature diurnal variation > annual average rainfall > annual average daily extreme rainfall. The influence of internal factorof rammed earth is more significant than that of environmental factors in the process of runoff-type gully development of rammed earth ruins in arid areas of northwest China.

Key words: rammed earth ruins, runoff-type gully, developmental eigenvalue, entropy weight method, grey correlation

中图分类号:

TU411.2

崔凯, 王冠众, 王东华, 王泽林. 干旱区线性夯土遗址径流型冲沟影响因素[J]. 兰州理工大学学报, 2020, 46(1): 144-151.

CUI Kai, WANG Guan-zhong, WANG Dong-hua, WANG Ze-lin. Influencing factors upon runoff-type gully on linearly rammed earth ruins in arid area[J]. Journal of Lanzhou University of Technology, 2020, 46(1): 144-151.

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