Chinese Academy of Sciences

Wujiu Railway Passenger Dedicated Line Hubei Co., Ltd

China Railway Southwest Scientific Research Institute Co., Ltd

China Railway Eleventh Bureau Group Fourth Engineering Co., Ltd.

China Railway Eleventh Bureau Group Co., Ltd

Wuhan University

Southwest Jiaotong University

Hubei Communications Planning and Design Institute Co., Ltd.

Anhui China Railway Engineering Technology Service Co., Ltd

China Railway Fourth Bureau Group Co., Ltd

Hubei Jiaotou Shixi Expressway Co., Ltd.

China Railway Seventh Group Co., Ltd.

Siemens Aktiengesellschaft

Siemens Energy Global Gmbh & Co. Kg

Hainan Jinpan Smart Technology Co. Ltd

Ming Zhang

Martin Alsina Navarro

Haoning Liang

Jun Gao

Xiao Lin

Zhengyi Wang

Feng Wang

Dan Xu

Xiaokai Wen

Yuxin Gao

Xiaowei Zuo

Yuan Liao

Andre Luiz Moreno

Bin Zhou

Ling Wang

Huiling Xue

Yongtai Wang

Jing Liu

Liyun Yang

Ke Chen

Kaiwen Liu

Xiaoqing Liu

Shan Pei

Songzhen Li

Linyue Gao

Geng Chen

Tenghui Xu

Chunfeng Meng

Dongsheng Xu

Zhiguo Liu

Juntao Kang

Junlei Zhou

Yongguo Qi

Zhongyi Zhang

Xiong Yu

Yan Yang

Wangxing Ding

Feng Shen

Qifen Wei

Wei Jiang

Hua Chen

Wuzhou Hu

Xingzhi Chen

Shoufeng Tang

Zuowei Qin

Bo Yao

Jinxia Zhao

Yajun Zhang

Yuqing Liu

Zhaohui Liu

Jianhui Zhan

Yong Guo

Yaoqiang Wang

Disclosed are a method and a device for identifying full-section excavation parameters of large-section tunnel with broken surrounding rock, capable of solving the problem of inaccurate arrangement of blasting hole points in tunnel excavation engineering, and including the following steps: establishing a three-dimensional finite element model based on a blasting section design of a tunnel; performing a simulation with the three-dimensional finite element model based on blasting design parameters to obtain blasting quality parameters; selecting a group closest to a preset quality parameter from multiple groups of the blasting design parameters as target blasting design parameters, wherein the preset quality parameter is an acceptance grade standard of the tunnel; obtaining first thermal imaging information of a first hot spot of a surface to be blasted; calibrating actual hole spacing parameters based on the first thermal imaging information and the target blasting design parameters.

Method and device for identifying full-section excavation parameters of large-section tunnel with broken surrounding rock

A reasonable millisecond time control method for excavation blasting of a tunnel is provided, and includes: acquiring physical mechanical parameters to establish a millisecond blasting model, and designing four dimensions blasting parameters of explosive quantity, hole number, inter-hole millisecond and inter-row millisecond; simulating, based on the millisecond blasting model, a blasting process of an explosive package using blasting parameters to obtain a blasting vibration curve; obtaining single-hole blasting vibration waveforms, solving a vibration synthesis curve through a vibration synthesis theory; comparing the vibration synthesis curve with the blasting vibration curve to obtain a coupling relationship of blasting parameters; determining a target group of explosive quantity and hole numbers, determining a target millisecond through the coupling relationship of blasting parameters, and relating a millisecond blasting control strategy to control, and it is used for tunneling project to reduce cut blasting vibration intensity and achieve precise and intelligent control of millisecond blasting.

Reasonable millisecond time control method for excavation blasting of tunnel

The present disclosure discloses a mid-span axial force-free connecting device for an earth-anchored cable-stayed bridge and a method for mounting same. The mid-span axial force-free connecting device for an earth-anchored cable-stayed bridge includes an externally sleeved large steel box girder and an internally embedded small steel box girder. A plurality of bearing beams are arranged on the inner periphery of the externally sleeved large steel box girder. Transverse spherical bearings or vertical spherical bearings are arranged on the bearing beams. The internally embedded small steel box girder is fixedly supported in the externally sleeved large steel box girder through a plurality of transverse spherical bearings and vertical spherical bearings. In the same section, the transverse spherical bearings are symmetrically arranged, and the vertical spherical bearings are also symmetrically arranged.

Mid-span axial force-free connecting device for earth-anchored cable-stayed bridge and method for mounting same

Growing community of inventors

Wuhan, China

Ming Zhang