Abstract
Longxihe dangerous rock is located on both sides of gully of Longxi river in Chongqing. The complex geological environmental condition made dangerous rock a typical geological hazard to Chongqing. Through field investigation of dangerous rock zone and analysis of geological environment condition, we researched the formation mechanism and unstable mode of dangerous rock and done qualitative analysis and analytical analysis to the dangerous rock. Under the condition of dead weight and surface load , the stability coefficient is 1.16~1.29, which illustrates that dangerous rock is basically stable; under the condition of dead weight, surface load and hydrostatic pressure, stability coefficient is 0.95~1.04, which illustrates that dangerous rock is not stable. The emergency capacity is so slow that it’s urgent to take treatment measures to control dangerous rock. And the control measures of clearing dangerous rocks, bolting, concrete spray protection and local hanging net to support should be adopted immediately.
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