New Anchor Disk Reinforcement Technology

The geotechnical anchoring technology of new anchor disk reinforcement is an important part in the field of geotechnical engineering, and it has a wide range of applications in the fields of hydraulic construction, towering structures, underground engineering, anti-slip engineering and slope engineering. However, the traditional anchor pullout force is mostly provided by its own friction force.

We mainly study the anchor rods which are mainly of disk structure to explore its force mechanism and its related calculation method, the main research contents are as follows:

1. Through the model test method, we study the damage mode of disk-type anchors, and explore the influence of the buried depth of the anchor disk, the size of the disk diameter and the distribution of the spacing of the anchor disk on the pullout force of the anchors under the given soil conditions. The pullout damage mechanism of disk anchors is analyzed; the damage modes of single-disk and multi-disk anchors under different working conditions are determined according to the test results.

2. By integrating the layered Mindlin solution, the displacement coordination equation and the balance equation of the pullout resistance between anchor rods and soil body in semi-infinite space soil body within the elastic deformation range are investigated. The relative displacement relationship between anchor rods and soil under loading is investigated; the pullout resistance mechanism of group anchors and the mutual influence characteristics between each disk anchor, as well as the influence characteristics of different numbers of anchor rods and different spacing of anchor disks on the distribution characteristics of the lateral friction resistance of single anchor rods in the anchor disk effect are investigated.

3. Based on Moore-Cullen theory, the relationship between pullout force and displacement in the limit state of disk anchor is studied, and the calculation method of pullout force of disk anchor is deduced by applying the theory of limit equilibrium of slider, and the results are verified to be basically the same through test.

4. ansys finite element numerical simulation method is applied to explore the force characteristics and deformation law of the disk anchor under the action of load, as well as the action properties and damage mode between it and the soil body, and the results are basically consistent with the test results.