Patents by Inventor Pingzhi CHEN

Pingzhi CHEN has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Surrounding rock pretreatment method for TBM passing through round tunnel section with high rock-burst risk
    Patent number: 9995139
    Abstract: The present invention relates to a surrounding rock pretreatment method for a TBM (tunnel boring machine) passing through a round tunnel section with high rock-burst risk. A technical solution of the present invention is as follows: the surrounding rock pretreatment method includes the following steps: 1. determining a pretreatment area, wherein an area in which a clear spacing between a to-be-constructed tunnel and an adjacent existing tunnel in a TBM tunneling direction is less than 2 times that of a tunnel diameter of the TBM to-be-constructed tunnel is the pretreatment area: 2. performing controlled blasting; 3. injecting high pressure water, and selecting part of blast holes I to perform cyclic water injection pressurizing; and 4, performing normal tunneling by the TBM.
    Type: Grant
    Filed: June 23, 2017
    Date of Patent: June 12, 2018
    Inventors: Weijiang Chu, Chunsheng Zhang, Jing Hou, Yong Zhou, Pingzhi Chen
  • SURROUNDING ROCK PRETREATMENT METHOD FOR TBM PASSING THROUGH ROUND TUNNEL SECTION WITH HIGH ROCK-BURST RISK
    Publication number: 20180010452
    Abstract: The present invention relates to a surrounding rock pretreatment method for a TBM (tunnel boring machine) passing through a round tunnel section with high rock-burst risk. A technical solution of the present invention is as follows: the surrounding rock pretreatment method includes the following steps: 1. determining a pretreatment area, wherein an area in which a clear spacing between a to-be-constructed tunnel and an adjacent existing tunnel in a TBM tunneling direction is less than 2 times that of a tunnel diameter of the TBM to-be-constructed tunnel is the pretreatment area: 2. performing controlled blasting; 3. injecting high pressure water, and selecting part of blast holes I to perform cyclic water injection pressurizing; and 4, performing normal tunneling by the TBM.
    Type: Application
    Filed: June 23, 2017
    Publication date: January 11, 2018
    Inventors: Weijiang CHU, Chunsheng ZHANG, Jing HOU, Yong ZHOU, Pingzhi CHEN