摘要
沙漠地区自然条件恶劣,风积沙结构松散、地基稳定性和承载性能差,常被视为工程建设＂禁区＂。但随着我国＂一带一路＂和全球能源互联网建设等国家战略的实施,越来越多的输电线路及其他关系国计民生的重点工程都需建设在沙漠腹地或需穿越沙漠地区。利用水泥作为固化剂固化稳定风积沙,形成固化风积沙地基将是改善其不利工程特性的有效手段。分析水泥作为固化剂固化稳定风积沙的基本原理,并采用内蒙古库布齐沙漠的风积沙试样,开展了不同水泥掺量下固化风积沙的强度和变形特性试验。结果表明：水泥作为固化剂能形成具有稳定的抗剪和抗压强度的固化风积沙地基,从而显著改善风积沙的强度和变形性能。当利用风积沙地基的天然含水量,并向其中掺入少量水泥固化稳定风积沙时,天然含水量与水泥掺量之间存在最优比值。
Desert areas are excluded from the engineering construction because of loose construction of aeolian sand,poor foundation stability and bearing capacity. However,with the implementation of strategies of the Silk Road Economic Belt and the 21 st-Century Maritime Silk Road（ BR） and the Global Energy Internet（ GEI）,more and more transmission lines and other key projects related to national economy and people＇s livelihood need to be built in desert hinterland or need to cross the desert areas. Cement-stabilization of aeolian sand can be regarded as an alternative method to improve the mechanical properties of aeolian sand in the desert areas. The purpose of the paper is to analyze the stabilization principle of aeolian sand and to investigate the strength and deformation of cementstabilized aeolian sand,which was depended on the aeolian sand samples collected from the Hobq Desert. It was indicated that cement had contributed to form solidified aeolian sand foundation with stable shear and compressive strength,thereby significantly improved the strength and deformation of aeolian sand. Taking advantage of the natural water content of aeolian sand foundation,the aeolian sand foundation was stabilized when a small amount of cement was added to the aeolian sand foundation,and there was an optimal water-to-cement ratio.
作者
鲁先龙
乾增珍
杨文智
郑卫锋
LU Xianlong;QIAN Zengzhen;YANG Wenzhi;ZHENG Weifeng(China Electric Power Research Institute, Beijing 100192, China;China University of Geosciences （Beijing）, Beijing 100053, China)
出处
《工业建筑》
CSCD
北大核心
2018年第3期103-108,共6页
Industrial Construction
基金
国家电网公司科技项目(GCB17201200123,GCB17201300166)
关键词
沙漠地区
风积沙
固化土
固化机理
desert area
aeolian sand
solidified soil
stabilization mechanism
