Calabash type anchor rod

Abstract

The invention relates to a calabash type anchor rod which comprises a rod body. The calabash type anchor rod is characterized in that the rod body is a hollow anchor rod body with one solid end. Axial grooves penetrating through the pipe wall of the rod body are formed at equal intervals in the pipe wall, close to the solid end of the rod body, of the hollow anchor rod body along the circumferential direction. Explosive is arranged inside the pipe wall with the axial grooves formed. Detonators are arranged inside the explosive. The calabash type anchor rod is simple in structure and low in cost, improves pulling resistance, and meanwhile can prevent rock-soil anchoring from being broken due to extraction of the anchor rod from a grouting body, and therefore enhances stability of a rock-soil body, greatly strengthens safety of anchoring for tunnels, side slopes, deep foundation pits and the like, and is capable of being widely applied to the anchoring for the tunnels, the side slopes, the deep foundation pits and the like.

Description

technical field [0001] The invention relates to rock-soil anchoring technology, in particular to a gourd-shaped anchor rod. Background technique [0002] Rock-soil anchoring is to tightly interlock the strata through the anchor bolts buried in the formation, relying on the interaction between the anchor bolt-grouting body-hole wall rock-soil physical force to mobilize and improve the rock-soil mass's own strength and natural strength. It is a technology to improve the stress state and ensure the stability of the external rock and soil mass, thereby ensuring the safety of the project. The application of geotechnical anchoring technology in geotechnical-related engineering can be traced back to the end of the 19th century. With the development of its theoretical research and engineering applications, geotechnical anchoring technology has been widely used in mines, water conservancy, hydropower, roads, railways, municipal As an ideal form of support, it plays an important role...

AI Technical Summary

Problems solved by technology

[0004] During the construction and operation of rock-soil anchorage, the pull-out of the anchor rod from the grouting body and the pull-out of the anchor rod and the grouting body from the anchor hole are the two most basic rock-soil anchorage failure forms, and they all cause rock-soil anchorage failure. Anchor failure, and bring hidden dangers to engineering safety, thus limiting the pullout force that the anchor can provide

Therefore, when the pull-out force needs to be provided, ordinary bolt anchorage can no longer meet the needs of the project, and it has become a bottleneck restricting the application and development of rock-soil anchorage technology. How to improve the load transfer mechanism of rock-soil anchorage and overcome ordinary friction The disadvantages of type anchoring become the fundamental way to improve the pullout resistance of anchor bolts

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