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| MECHANISM AND PRACTICE ON REINFORCING LOOSE BED LANDS、 LIDE WITH PRESTRESSED ANCHORING ROPE |
| JIANG Zhongxin |
| Second Survey and Design Institute,Ministry of Railways，Chengdu 610031 |
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Abstract Based on the test research and engineering practices on reinforcing the loose bed landslide with prestressed anchoring rope (anchor cable) ,the problems concerned with the stress response ,anchoring force ,exhaustion of prestress force and the group of anchoring ropes are explored.The practi?cal engineering applications of reinforcing the landslide and the slope in rock fracture zone , slump-mass and sandy gravel are also expounded in detail in this paper.
(According to research and practice,the following mechanism on reinforcing loose bed landslide and slope are expounded. The regularity of transmission and response of stress is similar in loose bed and in rock bed. The anchoring force in anchoring section loose bed may be strong enough through ex?panding the aperture and grouting in twice times. Exhaustion of pres tress force with compression creep of loose bed is limited and can be compensated. Effect of a group of anchoring rope is regular,as the in?terval of the rope is suitable.
Under some conditions,the engineering of reinforcing landslide and slope in rock fracture zone,slump- mass and sandy gravel is more cheap,high speed and safe with prestressed anchoring rope than anti?slide pile. The Laoyayan landslide of the Baoji-Chengdu railway is a example in which the reinforced loose bed was applied atone with prestressed anchoring rope. Using prestressed anchoring rope for re?inforcing the excavation wall o{ sandy gravel in building of Bank of China is the first time in Chengdu city. The Badu landslide of Nanning-Kunming railway in slump-mass, a main reinforcing engineering in which the prestressed anchoring rope was applied,is a most big controlled landslide in railways.
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Received: 20 July 1998
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1999, Vol. 16 
