The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jul. 15, 2025
Filed:
Oct. 11, 2022
China Railway 18 Bureau Group Co. Ltd., Tianjin, CN;
Xin Zhang, Tianjin, CN;
Jinshan Sun, Tianjin, CN;
Xiangping Zhang, Tianjin, CN;
Daqi Hu, Tianjin, CN;
CHINA RAILWAY 18 BUREAU GROUP CO. LTD., Tianjian, CN;
Abstract
A tunnel section subjected to grouting reinforcement is divided into two parts, that is, an upper half section and a lower half section, cutting vibration reduction holes used in coordination with cutting holes are formed in the upper half section, and the cutting vibration reduction holes are not charged and are filled with water bags only. According to the blast hole arrangement structure used for blasting for the rheological soft-weak surrounding rock tunnel of the invention, a cutting blasting effect is improved, excess energy is emptied and absorbed, propagation of shock waves and stress waves around is reduced, and vibration is reduced; and according to the invention, the purpose of forming vibration isolation holes in a tunnel excavation contour line of the upper half section is to prevent, absorb, reflect and refract the propagation of the blasting shock waves, stress waves and seismic waves.