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上层水泥浆预应力锚杆广泛应用于上层基础加固。锚杆头部主要作用是将拉杆的力传递给建筑物，易于掌握。水泥浆团结体对拉杆的握裹力大小取决于水泥浆质量及拉杆表面的清洁程度与凸凹程度。此类传力方式锚杆没有充分发挥钢筋拉杆的应力，造成锚固段深部上层抗剪应力的浪费，减小锚杆抗拔力。倒拉式锚杆则克服了上述缺点。水泥浆团结体与上层间的作用力对锚杆的极限抗拔力起决定作用，它的大小决定于水泥浆团结体凸体对上层的剪切应力和相对平滑的水泥浆团结体对土层的摩擦阻力。土层蠕变作用限定了锚杆安全系数的取值范围。锚固段要求设置在非重力土楔范围以外的稳定区域。
The upper layer cement slurry prestressed anchors are widely used in the upper foundation reinforcement. The main role of the bolt head is to transmit the force of the rod to the building and it is easy to grasp. The grip strength of the cement slurry body to the tie rod depends on the quality of the cement slurry and the degree of cleanliness and convexity and concaveness of the surface of the tie rod. Such force transmission mode bolts do not give full play to the stress of the reinforcing bars, resulting in the wastage of the upper layer of the anchorage segment in terms of the shear stress, and reducing the anchor bar pull-out resistance. Inverted bolts overcome these disadvantages. The interaction force between the unity body and the upper layer of the slurry determines the ultimate pull-out force of the anchor rod. Its size is determined by the shear stress of the convex body of cement slurry on the upper layer and a relatively smooth cement slurry. Layer frictional resistance. The role of soil creep limits the range of value of the safety factor of the bolt. The anchor section requires a stable area outside the non-gravity soil wedge range.