【摘要】 中国丝绸之路上保存有大量开凿于由钙质或泥质胶结的砂岩或砂砾岩崖体上的石窟,石窟所开凿岩体均有较多裂隙,这些裂隙进一步发育可引起石窟岩体坍塌,导致石窟毁灭性破坏。PS-F灌浆材料在我国砂砾岩石窟裂隙灌浆加固中取得理想的灌浆效果,但对该灌浆材料的机制研究相对滞后。利用X-衍射仪和扫描电子显微镜等手段,研究PS-F灌浆材料填料粉煤灰主要成分和微观形貌特征,不同模数PS的物理性质及微观形貌,以及不同模数和浓度PS-F结石体的收缩性、力学性质及形貌特征,通过以上研究对比,说明PS具有较好的可灌性,随着PS浓度不同和模数变化,PS-F灌浆材料强度发生变化,通过研究这方面的原因,可较好地解释PS-F灌浆材料的作用机制。更多还原

【Abstract】 Many grottoes are excavated in sandy conglomerate poorly consolidated with a little calcareous/argillaceous cementation on the Silk Road in China,also many cracks can be found on those grottoes.The further development of those cracks into cliff will cause collapse and devastating damage of rock of caves.PS-F grouting material has a perfect effect on crack grouting of conglomerate grottoes in China,but the mechanism research of PS-F grouting material is comparatively lagging behind.By X-Ray diffractometer(XRD),scanning electron microscopy(SEM) and other analytical tools,the main component and micro-morphology of fly ash,the physical mechanism of PS with different moduli,and the contractibility,mechanical property and micro-morphology of PS-F grouting material with different viscosities and moduli are studied.Comparing above results,it shows that PS-F has good groutability.The strength of PS-F grouting material changes with PS viscosity and modulus,and a reasonable interpretation of mechanism on the PS-F grouting material is presented.更多还原