Abstract
With the advantages of large anchoring force and fast anchoring speed, resin cartridge has become the main anchoring means of geotechnical engineering and underground space engineering support. Based on the theoretical analysis, it is clear that adding aggregate can improve the mechanical properties of grout and the bolt-grout interface stress state; the mechanical properties of aggregate are positively correlated with its improvement effect on anchorage performance. By using the numerical simulation method, it is concluded that the addition of steel segments into the resin grout can improve the stiffness of the anchorage system and enhance the energy absorption and antifailure ability of the anchorage system. Relying on the self-developed anchorage mixing device, the effects of steel segment diameter and addition amount on the anchoring force were studied experimentally, and the optimal addition amount of different types of steel segment to improve the maximum anchoring force was determined.
Highlights
Anchor support is a kind of reinforcement technology widely used in geotechnical engineering, which could significantly improve the stability of supporting objects, so it is recognized as an effective supporting method
Concrete has been widely used in the field of civil engineering. e addition of aggregate to concrete has been found to improve the shear strength, compressive strength, and tensile strength, and the results show that reasonable aggregate and mixing ratio can effectively improve the mechanical properties of concrete members [14,15,16]
Through the laboratory experiment, the change law of the bearing capacity of the anchorage system under the conditions of different steel segment adding amount and length diameter ratio was analyzed, and the optimal adding amount and length diameter ratio were determined. e research results can provide a new idea for improving the anchorage effect of rock bolt support in geotechnical engineering
Summary
Anchor support is a kind of reinforcement technology widely used in geotechnical engineering, which could significantly improve the stability of supporting objects, so it is recognized as an effective supporting method. E addition of aggregate to concrete has been found to improve the shear strength, compressive strength, and tensile strength, and the results show that reasonable aggregate and mixing ratio can effectively improve the mechanical properties of concrete members [14,15,16] Based on these experimental results, by adding aggregate to resin grout to improve the anchoring force, as illustrated, the influence of external uncertain factors can be Surrounding rock Aggregate. Cao et al and Zhang et al studied the change of anchoring force after adding metal particles to resin; the pullout test results showed a certain effect on the improvement of anchoring force [18,19,20]. E research results can provide a new idea for improving the anchorage effect of rock bolt support in geotechnical engineering Through the laboratory experiment, the change law of the bearing capacity of the anchorage system under the conditions of different steel segment adding amount and length diameter ratio was analyzed, and the optimal adding amount and length diameter ratio were determined. e research results can provide a new idea for improving the anchorage effect of rock bolt support in geotechnical engineering
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