砂浆锚杆是由钢筋(优先选用螺纹钢筋)作杆体,砂浆作胶结材料,将杆件锚固于围岩钻孔中的一种锚杆类型。这种锚杆最初用于水工建筑物新老混凝土的结合部位和混凝土与岩基的结合部位,称为“插筋”。由于水泥砂浆与锚杆和岩石都有相当高的粘聚力,所以它的锚固力也较大。锚杆在注浆密实的条件下也具有较好的防锈蚀能力。这种锚杆通过水泥砂浆与围岩联成整体,与围岩共同工作,更发挥了它对危岩的加固作用。由于这种方法施工简便,因此在支护中得到了广泛应用。目前国内房屋抗震加固中,砖墙墙体与 Mortar bolts are reinforced bars (preferred threaded reinforcements) as rods, mortars as cementing materials, and bolts anchored in surrounding rocks. This kind of anchor rod was originally used in the joint of new and old concrete in hydraulic structures and the joint of concrete and rock foundation. It was called “interposer”. Because of the high cohesion of cement mortar, anchor rod and rock, its anchoring force is also large. The bolt also has good anti-corrosion ability under the grouting and dense conditions. This type of rock bolt is integrated with the surrounding rock through the cement mortar and works together with the surrounding rock to give full play to its strengthening effect on the dangerous rock. Because this method is easy to construct, it has been widely used in support. At present, the anti-seismic reinforcement of domestic houses, brick wall and