Assembled damping and yielding anchorage device and construction method

Abstract

The invention discloses an assembled damping and yielding anchorage device and a construction method, and relates to the technical field of slope support. The anchorage device comprises a box-type anchorage device box and a cross-shaped damping and yielding system. The box-type anchorage device box is composed of an upper half anchor box and a lower half anchor box. The cross-shaped damping and yielding system is composed of a vertical damping and yielding component and a transverse damping and yielding component. During construction, the assembled damping and yielding anchorage device is assembled according to requirements, an anchor rod is inserted into a hole after the hole is drilled in a slope body, concrete is poured, release is performed after pre-tensioning, force larger than a pre-stress value is applied to the assembled damping and yielding anchorage device according to requirements, the anchorage device is arranged on a slope, and a reducing threaded sleeve is in threaded connection with the free end of the anchor rod (cable) to release the prestress in the anchorage device to finish tensioning. After the support function is completed, a cylindrical rod body with threads in the upper portion is pressed downwards for a certain distance, the reducing threaded sleeve is screwed to be separated from the free end of the anchor rod (cable), and recycling is achieved. The defect that a traditional anchorage device cannot achieve yielding and damping is overcome.

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.

Images