Nanjing Hydraulic Research Institute

Nanjing Hydraulic Research Institute Under the Ministry of Water Resources, the Ministry of Transport and the Ministry of Electric

Chengdu Branch of Guodian Academy of Science and Technology Co., Ltd.

Denghua Li

Fang Wang

Chen Chen

Gang Wu

Jun Li

Sheng Yang

Ming Zhang

Hua Fu

Hua Ling

Yanzhang Zhou

Juhua Zhang

Yang Kong

Guirong Zhang

Zehua Huangfu

Zhikun Yan

Hongxia Fan

Binhua Xu

Zhe Hu

Yingli Wu

Wanli Guo

Lifei Gong

Yufeng Huangfu

Ting Shen

Jing Yuan

Limin Xiao

Yong Li

Ning He

Yuting Xie

Zhaosheng Zhang

Zhangchun Wang

Qiming Zhong

Xiang Yin

Shilin Li

Xinjie Zhan

Yongyong Cao

Yanbin Jiang

Bin He

Jiefu Wu

Ruiji Yi

Jingping Ming

Yajun Qian

Zhongliu Zhang

A method for reinforcing soft ground by post-grouting combined with pressurized vacuum preloading is proposed, by pre-burying prefabricated vertical drains and air-boosted pipes in granular material piles, and the air-boosted pipes are used as grouting pipes to reduce the number of times of piling, which not only improves the construction efficiency, but also reduces the structural disturbance of the soil and the influence of smear effect, thus reducing the impact on the radial permeability and the radial consolidation coefficients. The method does not use geotextile bags for granular materials, which can avoid the problem of forming a localized clogging area around the geotextile bags, and the method not only improves the efficiency of vacuum transfer in a pre-consolidation stage, but also improves the grouting effect in the later stage, effectively enhances the strength of soft soil and makes granular material piles and the surrounding soil form composite ground.

Method for reinforcing soft ground by post-grouting combined with air-boosted vacuum preloading

Provided is an underwater repair system for a cavity region of a concrete panel rock-fill dam panel, including a moving platform, a work cabin, a pressure drainage apparatus, a traction apparatus, and a positioning apparatus; the traction apparatus controlling the movement of the moving platform on the surface of a dam concrete panel; the positioning apparatus transmits a detection position; the work cabin is a pressure cabin, the work cabin being connected to the pressure drainage apparatus, and a drill apparatus and grouting apparatus being arranged in the work cabin; the moving platform moves into the cavity region, and the pressure drainage apparatus starts up to drain the water in the work cabin, a partially closed waterless space being formed inside the work cabin, the drill apparatus drilling the concrete panel at the upper end of the cavity region and the grouting apparatus subsequently implementing grouting to complete the repair.

Underwater repair system for cavity region of concrete panel rock-fill dam panel

Growing community of inventors

Nanjing, China

Denghua Li