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榆林窟下洞子石窟崖体表面的风化是西北地区砂砾岩石窟中最普遍、最严重的病害。PS溶液加固砂砾岩石窟表面的施工工艺,包括表面喷洒渗透加固、小裂隙注浆加固、表面做旧处理等。通过对不同的施工关键参数包括PS溶液模数、浓度、用量、喷涂压力、喷涂时间、渗透深度等进行计算和控制,现场对比试验分析研究得出,加固风化砂砾岩时出现的泛白问题主要由对PS模数控制不当,或者不适宜的加固工艺造成。PS加固风化砂砾岩的最佳模数为3.8~4。喷洒方式可选择低浓度多次喷洒,每次喷洒在前次喷洒充分自然干燥后再进行。
Yulin Grottoes under the Grottoes Cliff surface weathering is the gravel rock caves in Northwest China’s most common and the most serious diseases. PS solution to strengthen the construction process of gravel rock grottoes, including surface spray infiltration reinforcement, small gap grouting reinforcement, the surface to do the old treatment. Through the calculation and control of different key parameters of construction, including PS modulus, concentration, dosage, spraying pressure, spraying time, penetration depth and so on, the comparative analysis of field tests shows that the whitening problem in strengthening weathered glutenite is mainly Caused by the improper control of the PS modulus, or improper reinforcement caused by the process. The best modulus of PS reinforced weathered glutenite is 3.8 ~ 4. Sprinklers can choose to spray a number of low concentrations, each spray before the last full natural spray before proceeding.