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- Title
Field and numerical investigation of sealing the ultra-thick dolomite aquifer for a vertical shaft by surface pre-grouting.
- Authors
Zhou, Yuliang; Hou, Gongyu; Yuan, Dongfeng; Ding, Zhenyu
- Abstract
For the purpose of solving the problem of water prevention for a vertical shaft passing through the sinian ultra-thick dolomite (SUTD) aquifer in Southwest China, the groutability of the SUTD and the technical parameters of the surface pre-grouting (SPG) were studied by a field grouting test and numerical simulation. Firstly, the field grouting test was conducted to investigate the groutability of the SUTD. According to the results of the field test, the SUTD could be divided into two members, and the upper member has greater groutability than that of the lower member. In the upper member, special measures should be utilized to avoid the overspread phenomenon, while a high pressure should be applied to increase the grout takes for ensuring the sealing effects in the lower member. Then, the rational borehole spacing and final grouting pressure were obtained through numerical simulation and the field SPG test. Finally, the effectiveness of the SPG was verified by the water pressure test. The residual water inflow was small enough to meet the shaft sinking after the SPG was completed, and the sealing efficiency was 98.04%. The results of the present paper could provide technical references for water controlling for shaft sinking under the similar geological conditions.
- Publication
Arabian Journal of Geosciences, 2021, Vol 14, Issue 4, p1
- ISSN
1866-7511
- Publication type
Article
- DOI
10.1007/s12517-021-06620-7