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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 foundation construction of existing buildings, roads, railways and other buildings. Due to special requirements such as non-stop construction of airport pavement, the technology has not been applied in airport field engineering . A kind of high polymer material was chosen as the foundation reinforcement material, and its compressive strength, elastic modulus and maximum expansion force were studied. The results show that when the density ρ increases from 86.72 kg / m 3 to 290.66 kg / m 3, the compressive strength q increases from 1.55 MPa to 11.61 MPa and the elastic modulus E increases from 21.25 MPa to 106.17MPa, and the failure characteristics of the cured body gradually became brittle with the increase of the density. When the density ρ of the cured body increased from 92.13 kg / m ~ 3 to 420.36kg / m ~ 3, the maximum swelling force P increased from 0.11 MPa As large as 1.12 MPa, the larger the density, the larger the maximum expansion force and the faster the expansion force grows. Within 60 s, the expansion force can be increased to about 90% of the maximum expansion force. The above conclusion is of reference value for applying the polymer grouting technology to the non-stop consolidation of the airport track.