摘要
以PS材料加固的古遗址土为研究对象,选用具有代表性的古长城遗址土和故城遗址土两大类,对其原状样和重塑样进行PS材料加固,进行抗压、抗拉、雨蚀、风蚀试验及雨蚀、风蚀组合等试验,研究其力学强度特征及耐久性能。试验结果表明:经PS材料加固后,遗址土体的力学性能和抗雨蚀、抗风蚀能力明显提高;古长城土经PS加固后,其抗压强度可提高至1.5倍,且以PS浓度为5%、加固3次效果最佳,内聚力和内摩擦角明显提高,渗透性能小幅度降低;随老化时间增长,强度未降低,至少能承受8次冻融循环;PS加固故城土后,土体强度可提高1.2～1.8倍,抗风蚀能力提高6～24倍,抗雨蚀和风蚀综合能力提高6～13倍。PS材料具有良好的加固效果,为广泛地应用于土遗址保护加固工程中提供了理论依据。
The soils of the ancient Great Wall and ancient city were selected. The mechanical strength and durability of raw and remoulded soil reinforced by PS were studied. The pressive strength,tensile strength,aging test,rain erosion,aeolian erosion and combination test were carried out. The results show that after being reinforced by PS material,the intensity,anti-rain erosion and anti-aeolian erosion ability of the soil are improved obviously. After being reinforced,the pressive strength of ancient Great Wall can be increased to 1.5 times as large as that before being reinforced,and after reinforced three times,its effect is best when consistency of PS is 5%. Cohesion force and internal friction angle can be improved. The penetrability is not affected. The strength of ancient Great Wall soil does not reduce with the aging of time,and it can endure 8 circles of freeze thawing. Comparied with raw soil,strength of ancient city soil reinforced by PS can increase by 1.2-1.8 times,anti-aeolian erosion increases by 6-24 times and the ability of anti-rain erosion and anti-aeolian erosion increases by 6-13 times. PS material has good effect of reinforcement,and it will offer instructive theory and application examples for further optimizing its performance to reinforcement of earthen architecture.
出处
《中南大学学报（自然科学版）》
EI
CAS
CSCD
北大核心
2010年第3期1132-1138,共7页
Journal of Central South University:Science and Technology
基金
国家"十一五"科技支撑项目(2006BAK30B02)
关键词
PS材料
土遗址
加固
耐久性
PS material
earthen architecture
reinforcement
durability
