摘要
高聚物注浆技术已广泛应用于工民建、道路、铁路等已有建筑物的地基加固,由于机场道面不停航施工等特殊要求,在机场场道工程领域该技术一直未能得到应用。选定某种高聚物材料作为场道地基加固材料,对其抗压强度、弹性模量及最大膨胀力变化规律进行了研究。试验结果表明:当固化体的密度ρ从86.72 kg/m^3增大到290.66 kg/m^3,抗压强度q由1.55 MPa增大至11.61 MPa,弹性模量E由21.25 MPa增大至106.17MPa,而且随密度的增大固化体的破坏性状逐渐呈现出脆性;当固化体密度ρ从92.13 kg/m^3增大到420.36kg/m^3时,最大膨胀力P从0.11 MPa增大到1.12 MPa,密度越大,最大膨胀力越大且膨胀力增长速率越快,一般60 s内,膨胀作用力就能够增长到最大膨胀力的90%左右。上述结论对于将高聚物注浆技术应用于机场场道的不停航加固处理具有参考价值。
Polymer grouting technology has been widely used in civil engineering, roads, railways and other existing building foundation reinforcement. Due to the special requirements of airport pavement construction of non-stop flight, this technology has not been applied in the field of airport engineering. Some polymer materials are chosen as subgrade reinforcement materials, and the compressive strength, elastic modulus, maximum expansion force with the change of material density are studied. Test results show that when the density of polymer solidified slurry increases from 86.72 kg/m3 to 290.66 kg/m3, the yield compressive strength increases from 1.55 MPa to 11.61 MPa, the elastic modulus increases from 21.25 MPa to 106.17 MPa, and the stress-strain relation appears brittle tendency with the increase of density. The polymer solidified slurry density is between 92.13 kg/m3 and 420.36 kg/m3, and the maximum expansion force is between 0.11 MPa and 1.12 MPa. The greater the density is, the greater the maximum expansion force becomes, and the faster the growth rate of expansion force is. Generally, within 60s, the expansion force will be able to reach the maximum expansion force by about 90%. The conclusion can provide reference for dealing with the application of polymer grouting reinforcement technology in airport non-stop flight.
出处
《中国民航大学学报》
CAS
2017年第1期32-35,46,共5页
Journal of Civil Aviation University of China
关键词
机场工程
高聚物注浆材料
密度
抗压强度
弹性模量
膨胀力
airport engineering
polymer grouting material
density
compressive strength
elasticity modulus
expansionforce
