Nanjing Hydraulic Research Institute

Yajun Qian

Denghua Li

Yuting Xie

Xiang Yin

Xinjie Zhan

Yanzhang Zhou

Zhongliu Zhang

Zhikun Yan

Ning He

Guirong Zhang

Yang Kong

Bin He

Yanbin Jiang

Zhangchun Wang

Binhua Xu

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

Growing community of inventors

Nanjing, China

Yajun Qian