【摘要】 非水反应双组份聚氨酯高聚物已广泛应用于隧道工程。为获取该材料应用于浅海隧道工程后的抗剪强度,文中采用真空设备和常规三轴试验仪,在2种密度、2种水压浸泡、不同浸泡时间的工况下,对圆柱和圆筒聚氨酯高聚物试件进行海水浸泡加速试验与抗剪强度试验,测试其黏聚力和内摩擦角。试验结果表明:(1)在高水压和常水压工况下,抗剪强度随着浸泡时间的增加而降低,浸泡30 d时,圆柱试件黏聚力减小约50%,内摩擦角增加约3%～7%。圆筒试件黏聚力减小26%～45%,内摩擦角增加1.4%～2.5%;(2)一定密度范围内的非水反应双组份聚氨酯高聚物,高密度的试件的抗剪强度大于低密度的抗剪强度;(3)一定水压范围内,不同的水压对聚氨酯高聚物的抗剪强度影响微弱。更多还原

【Abstract】 Non-water reacted two component polymer(NRTCP) has been widely used in tunnel engineering. In order to obtain the shear strength of NRTCP after it is used in the shallow oceanic tunnel engineering, two densities of cylinder and drum specimens were tested by immersion acceleration test, and then shear stress tests were carried out under the condition of two different kinds of water pressure and different soaking times. The vacuum equipment and conventional triaxial tester were used, and the cohesion and internal friction angle were tested. The results show that(1)Under high and constant water pressure conditions, the shear strength decreases with the increase of immersion time. When NRTCP cylinder specimens soak for 30 days, cohesion drops approximately 50%, and friction angle increases about 3% to 7%. After drum specimens soak for 30 days, cohesion drops approximately 26% to 45%, and friction angle increases about 1.4% to 2.5%.(2)Shear strength of NRTCP specimen with high density is higher than that with low density specimensin a certain density range.(3)Immersion depth has limited influence on the shear strength of the NRTCP specimensin a certain water pressure range.更多还原