复合固化剂加注方法对土遗址加固效果的影响  

Influence of treatment methods of composite consolidant on consolidation of earthen sites

作　　者：张迎敏 谌文武[1] 杨光 戴鹏飞 李永杰 ZHANG Yingmin;CHEN Wenwu;YANG Guang;DAI Pengfei;LI Yongjie(Key Laboratory of Mechanics on Disaster and Environment inWestern China,Ministry of Education,School of Civil Engineering and Mechanics,Lanzhou University,Lanzhou 730000,China;ChinaWater Resources Bei Fang Investigation Design&Research Co.Ltd.,Tianjin 300222,China;Zhejiang Historical Architecture Design&Research Institute,Hangzhou 310014,China)

机构地区：[1]兰州大学土木工程与力学学院,西部灾害与环境力学教育部重点实验室,甘肃兰州730000 [2]中水北方勘测设计研究有限责任公司,天津300222 [3]浙江省古建筑设计研究院,浙江杭州310014

出　　处：《中南大学学报（自然科学版）》2020年第7期1946-1954,共9页Journal of Central South University:Science and Technology

基　　金：国家自然科学基金资助项目(51578272)。

摘　　要：研究复合加固剂的加注方法对土遗址透气性及力学特征的影响。将复合加固剂分别以钻孔注浆、浸泡、毛细吸收、表面喷洒4种方式对重塑土样进行加固,通过固化剂的有效吸收量控制试样的透气性,并对加固后试样表面和整体力学特性的变化进行评价,以寻求具有良好效果的加注方法。研究结果表明:钻孔注浆对固化剂的吸收量较大,烘干后表面硬度增幅较大,但抗压强度增加较小,加固后应对注浆孔用铆钉进行补强。浸泡和毛细吸收试样的固化剂吸收量较低,土体的透气性增加,由于其由外而内渗透的加注方式表面硬度提升明显,抗压强度也较高,加固效果较好。表面喷洒试样固化剂有效吸收量较大,透气性能维持原状,同时获得了较高的表面硬度和抗压强度。因此,浸泡、毛细吸收和表面喷洒方法是处理土遗址表面风化较为有效的方法。The influences of treatment methods of composite consolidants on the ventilation and the mechanical properties of earthen sites were studied. The remolded soil samples were treated with composite consolidant by trickling infiltration, soaking, capillary absorption and spraying, respectively. Breathability was controlled by effective absorption of the consolidant, and then the changes of surface and overall mechanical properties of the specimens were evaluated after treatment to explore effective treatment methods. The results show that the amount of consolidant absorbed by trickling infiltration is large. The surface hardness after drying rises considerably, while compressive strength increases slightly, Therefore, rivets should be used to reinforce the grouting holes. The specimens treated by soaking and capillary absorption have lower absorbance and higher breathability, and surface hardness and compressive strength are improved obviously due to the way of infiltration from outside to inside,which results in good consolidation effects. The specimens treated by spraying absorb larger amount of consolidant, and the breathability maintain the original stage, so that the specimens have the higher surface hardness and compressive strength. Therefore, soaking, capillary absorption and surface spraying are effective methods to preserve the external weathered layers of earthen sites.

关 键 词：土遗址 复合加固剂 加注方法 透气性 力学特征 

分 类 号：TU411[建筑科学—岩土工程]