An Assembled Shock Absorbing Pressure Anchor and Construction Method

Abstract

An assemblable shock-absorbing yielding anchor and a construction method relate to the technical field of slope support, including a box-type anchor box and a cross-shaped shock-absorbing yielding system. The box-type anchor box is composed of an upper half anchor box and a lower half anchor box. The cross-type shock absorption and pressure relief system is composed of vertical shock absorption and pressure relief components and horizontal shock absorption and pressure relief components. During construction, assemble the shock-absorbing yielding anchor as required. After drilling the hole on the slope, insert the anchor rod into the hole, pour concrete, and release it after pre-tensioning. The force of the prestress value, the anchor is placed on the slope, and the free end of the anchor rod (cable) is threaded through the reduced diameter threaded sleeve to release the prestress in the anchor to complete the tension. After the support function is completed, the upper threaded cylindrical rod is pressed down for a certain distance, and the reduced-diameter threaded sleeve is twisted to separate it from the free end of the anchor rod (cable) to realize recovery. It solves the disadvantage that the traditional anchorage cannot let the pressure and shock absorb.

Description

technical field [0001] The invention relates to side slope support calculations, in particular to the technology of an assembling-type shock-absorbing yielding anchor. Background technique [0002] Foundation pit engineering is an ancient geotechnical engineering subject with the characteristics of the times. The earliest grading excavation and simple wooden pile enclosure can be traced back to ancient times. With the rapid development of the economy and the acceleration of urbanization, the utilization of urban space gradually tends to excavate in three-dimensional space. The construction of high-rise buildings, underground rail transit and facilities makes the construction and design of foundation pit engineering more and more difficult, and thus The problems of slope instability and large deformation are becoming more and more prominent. However, ordinary anchors cannot relieve the pressure of the surrounding rock through their own pressure deformation during the anchori...

AI Technical Summary

Problems solved by technology

In addition, when the ordinary anchorage is under the action of the earthquake, it may be damaged, resulting in the loss of prestress, or causing the main working anchor to break.

As mentioned above, because the structure of ordinary anchorage is mostly tower-shaped, in addition to meeting certain stress requirements in strength, the structure and function are too single, and it is no longer suitable for large deformation and high ground stress cavern support.

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