Analysis of Displacement in Guandi Underground Powerhouse Based on the Influence of Dislocation Surfaces

Abstract:

The monitoring data suggests that the overall displacement in Guandi underground powerhouse is a little less, 87% of which is less than 30 mm, while the maximum deformation can be reached as big as 65.77mm. Combined with the study on excavated geological data, the bigger displacement part of Guandi underground powerhouse is mainly affected by the dislocation interfaces, the excavation disturbance causes an opening displacement on the rock mass near the dislocation interfaces and a much bigger displacement partially. Due to the structural surface cut rock mass, deformation coordination between the surrounding rock and the structure surface after stress applied, the stress concentration appears nearby, measuring range of bolt stress meter is excessed in large displacement cases.

• Periodical: Applied Mechanics and Materials (Volumes 303-306)
• Pages: 2866-2870
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.303-306.2866
• Online since: February 2013
• Authors: Meng Ke Yuan, Chun Yu Gao, Hong Chun Zheng
• Keywords: Dislocation Interfaces, Displacement Monitoring, Influence, Underground Powerhouse

References

[1] PENG Qi, DENG Jiang-hui. Analysis of surrounding rock deformation characteristics in underground powerhouse[J]. Chinese Journal of Rock Mechanics and Engineering，2007，26（12）: 2583-2587.

[2] WANG Di-kai, PENG Qi. Causes analysis of cracking of rock-bolted crane girder in an underground powerhouse[J]. Chinese Journal of Rock Mechanics and Engineering，2007，26（10）: 2125-2129.

[3] ZHANG Jiang-hai, HU Zhu-xiu. Acoustic velocity fitting and monitoring feedback analysis of surrounding rock loosing zone in underground powerhouse[J]. Chinese Journal of Rock Mechanics and Engineering，2011，30（6）: 1191-1197.

[4] TANG Jun-feng, XU Guo-yuan. Cause analysis of longitudinal cracks of rock-anchored beam and its developmental trend in underground powerhouse[J]. Chinese Journal of Rock Mechanics and Engineering，2009，28（5）: 1000-1009.

[5] LI Zhong-kui, WANG Ai-ming. Analysis for a triggered collapse in construction of a underground powerhouse[J]. Chinese Journal of Geotechnical Engineering. 1997，19（5）: 76-79.

[6] Guandi hydropower station Final Report.

[7] HUANG Run-qiu. Time-dependent deformation of a high rock slope and its engineering-geological significance[J]. Journal of Engineering Geology，2008，8（2）: 148-153.

[8] HUANG Qiu-xiang, DENG Jiang-hui. Displacement characteristics analysis of surrounding rock in underground powerhouse chambers at Pubugou hydropower station during construction[J]. Chinese Journal of Rock Mechanics and Engineering，2011，30（supp1）: 3032-3042.

[9] ZHANG Ding-li, WANG Yue-han. Influence analysis of inter-band on stability of stratified rock mass[J]. Chinese Journal of Rock Mechanics and Engineering，2000，19（2）: 140-144.