›› 2013, Vol. 34 ›› Issue (5): 1397-1402.

• Geotechnical Engineering • Previous Articles     Next Articles

Application of stress monitoring to highway rock slope

GUO Yong-jian1, 2,WANG Shao-fei3,LI Wen-jie4   

  1. 1. Department of Geotechnical Engineering, Tongji University, Shanghai 200092, China; 2. Key Laboratory of Geotechnical and Underground Engineering of Ministry of Education, Tongji University, Shanghai 200092, China; 3. School of Highway, Chang’an University, Xi’an 710064, China; 4. Guangdong Provincial Highway Construction Co., Ltd., Guangzhou 510600, China
  • Received:2012-05-22 Online:2013-05-10 Published:2013-05-14

Abstract: In light of the problems of that the highway rock slopes have large numbers and slope stability is hardly to predict in time, the stress monitoring method of the anchoring rock bolt is used to evaluate slope stability. Typical slope along Guangyuan- Shaanchuan expressway reconstruction as the example, the FLAC3D software is taken to simulate the excavating and support process of the rock slope, and the strength reduction method is taken to analyze the change of rock bolt axial force during the rock mass strength reduction process, the monitoring values are obtained; and combined with the result of field test to evaluate the slope stability. The research results show that the mainly monitoring locations should be at mudstone structures, and the stress monitoring is a wholly system; so that the early warning should be made if axial force values at any locations reached the early warning values; The result of field test shows that the stress monitoring has obvious change at 120 d, while the displacement change has a time lag, it appear obvious change at 167 d; from the results of stress monitoring and displacement monitoring, a conclusion is drawn that the slope keep in a state of safety operation, so the proposed stress monitoring method can be applied to evaluate the highway rock slope stability.

Key words: highway engineering, rock slope, stress monitoring, strength reduction method, early warning

CLC Number: 

  • U 416.1
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