The impact of investigation specifications on the danger elimination and reinforcement engineering of medium and small reservoirs in China

Abstract

Aiming at major dangerous phenomena about medium and small reservoirs that have been reinforced in recent years, and major dangerous situations such as dam-collapsed dams and landslides, the impact of investigation specifications on reinforcement projects on reservoirs have been discussed. Based on the danger elimination and reinforcement data of medium and small reservoirs in our country, the impact of investigation specifications on the reinforcement projects of medium reservoirs through examples, and compares the differences between the Specification of engineering geological investigation for medium-small water conservancy and hydropower development(SL 55—2005) and three normative documents on the investigation regulations for danger elimination and reinforcement of small reservoirs were analyzed. The result show that:(1) 62.4% of the country's reinforcement projects of medium reservoirs without appropriate investigation specifications, it has a profound influence on the dam safety of the reinforcement projects of medium reservoirs.(2) The two normative documents and the individual provisions of SL 55—2005 have had an immeasurable and far-reaching impact on the dam safety of 99.3% of the country's reinforcement projects of small reservoirs.(3) The SL 55—2005 does not guarantee the quality of specification and design for the hundreds of reinforcement projects of medium reservoirs and reinforcement that need to be completed in the near future, one normative document will ensure the quality of the reinforcement of small reservoirs reinforcement in the implementation. The result show that it is urgent to revise and perfect SL 55—2005 to ensure the safety of medium and small reservoirs dams.

Keywords

medium and small reservoir / danger elimination and reinforcement / investigation specification / engineering influence