TEOS原位交联加固重塑土样的抗风蚀性能  

Anti-wind erosion of the remolded soil in situ cross-linking reinforced with TEOS

作　　者：汪娟丽[1] 李玉虎[1] 邢惠萍[1] WANG Juanli;LI Yuhu;XING Huiping(Engineering Research Center of Historical and Cultural Heritage Protection,Ministry of Education,Shaanxi Normal University,Xi＇an 710119,Shaanxi,China)

机构地区：[1]陕西师范大学历史文化遗产保护教育部工程研究中心,陕西西安710119

出　　处：《陕西师范大学学报（自然科学版）》2018年第5期72-76,共5页Journal of Shaanxi Normal University：Natural Science Edition

基　　金：国家自然科学青年基金(41601232);中国博士后科学基金特别资助(2014T70902);中国博士后科学基金(2013M542322);中央高校基本科研业务费专项资金(GK201603106)

摘　　要：为了探索正硅酸乙酯(TEOS)加固重塑土样的抗风蚀性能,采用TEOS对重塑土样进行原位交联加固,并对其进行了抗剪强度试验和室内风蚀模拟试验。结果表明:TEOS固化剂的加入有效地提高了重塑土样的抗剪强度,加固重塑土样的黏聚力比未加固重塑土样增大了27%;加固重塑土样的内摩擦角比未加固重塑土样增大了135%。通过对加固与未加固重塑土样在不同风速、不同吹蚀时间下进行携沙风吹蚀,发现在相同风速携沙风吹蚀条件下,未加固与加固重塑土样的风蚀量都随着吹蚀时间的延长而呈现递增趋势;未加固重塑土样的风蚀量和风蚀量增长率均比加固重塑土样的大,表明TEOS原位交联加固重塑土样具有明显的抗风蚀能力。Weathering is one of the commonest serious disease in ancient earthen sites in Northwest China,the violent wind erosion caused many ancient earthen sites collapsed.In order to evaluate weathering resistance of the remoded soil in situ cross-linking reinforced with TEOS,the shear strength and wind erosion simulation tests were carried out.The experimental results show that TEOS can effectively improve the shear strength of remolded soil samples.Compared with the unreinforced remolded soil samples,the cohesive strength of the reinforced remolded soil samples increased by 27%,and the internal friction angle of reinforced remolded soil samples increased by 135%.The wind erosion tests of the reinforced and the unreinforced remolded soil samples at different wind speeds and different blowout times showed that the wind erosion amount of the unreinforced and remolded soil samples increased with the prolongation of the time of erosion under the same wind speed,and the rate of increase of the wind erosion amount of theunreinforced remolded soil samples is greater than that of the reinforced remolded soil samples.All results mentioned above showed that TEOS in situ crosslinking reinforced remolded soil samples had obvious wind erosion resistance.

关 键 词：重塑土样 加固 风化 正硅酸乙酯 

分 类 号：K878[历史地理—考古学及博物馆学] P642.116[历史地理—历史学]