Tunnel excavation in weak surrounding rock areas is prone to landslide accidents, and the use of high-pressure rotary piles to pre-strengthen the soil in the local area can enhance the strength and bearing capacity of the surrounding rock. Discrete lattice spring model is established with the three-dimensional morphology modeling system of the rotary pile reinforcement. It is used to quantitatively characterize the reinforcement effects of high-pressure rotary piles, to analyze the influence of the reinforcement ratio and reinforcement function. The results show that compared with the deformation of unreinforced stratum, the high-pressure rotary pile can better control the ground surface settlement. The larger the reinforcement ratio is, the better the reinforcement effect of the rotary spray pile is, especially with the increase in reinforcement ratio, the contact between individual piles bites to form a row of piles, which can significantly improve the ability of the formation to resist deformation. Under the same reinforcement situation, the square root type reinforcement function has the best reinforcement effect, the line function has the middle reinforcement effect, and the quadratic type reinforcement function has the worst effect.

软弱围岩地区隧道开挖容易发生滑坡事故，采用高压旋挖桩对局部区域土体进行预加固，可以增强围岩强度和承载力。利用旋转桩加固三维形貌建模系统建立了离散点阵弹簧模型。用于定量表征高压旋转桩的加固效果，分析加固率和加固功能的影响。结果表明，与未加固地层变形相比，高压旋转桩能够更好地控制地表沉降。加筋率越大，旋喷桩的加固效果越好，特别是随着加筋率的增加，单桩之间的接触咬合形成排桩，可显着提高地层的加固能力。抵抗变形。在相同加固情况下，平方根型加固函数加固效果最好，直线函数加固效果居中，二次型加固函数加固效果最差。