Analysis And Implementation Of The Dam Anti-seepage Reinforcement For LangYuan Reservoir

Most reservoirs in China were established between1958and1976. The majority of engineering were concurrently under reconnaissance, design and construction. Some reservoirs were constructed without design and some fell short of sufficient hydrological resource notwithstanding the design. The technology standard and format were imperfect and construction plant was outdated. Uncompleted projects were induced due to lack of construction investment and infrequent suspense. The underlying peril behind the unsound reservoirs is no guarantee quality from design to construction. With the preliminary management of rivers and growing perfection of flood-disaster control, uncompleted reservoirs are increasingly becoming the biggest threat to life and property of people mass, which attracts special attention from the government to emphasis on reinforcement of the defective reservoir.Since the21st century, the domestic dilapidated reservoirs and consolidate the pace of the work faster and faster. The current domestic large and medium-sized reservoirs and consolidate work is now coming to an end, and reinforcement of the dam is in the peak period of construction, Small reservoirs are numerous, accounts for about95%of the total number of reservoir. Consolidate work is influenced by economic conditions, construction conditions and factors such as the construction cycle, Investment scale and construction standards are less than the level of medium reservoir. In consolidation project of numerous small reservoir dam seepage prevention is particularly important, which is the important foundation of the dam safety and normal operation of the reservoir. According to the statistics,95%of the reservoir dam is earth-rock DAMS, How to select the most economical, suitable seepage control system and the construction craft, is very important to the dam seepage control effect of the reinforcement.This paper takes Lang Yuan reservoir seepage and consolidate dam project as an example, which is for domestic key small reservoirs. Dam reinforcement is experienced two different anti-seepage technology of design and construction, and adopted different seepage control system and the construction technology respectively. The seepage control effect is distinct. Through the Lang Yuan two different process experienced by dam seepage control system of survey and design, construction, operation monitoring the whole process of analysis and study, analysis and evaluation of two different seepage control system and the improvement measures are put forward.After gaining good anti-seepage effect, Deep mixing pile cut-off meet the bedrock curtain grouting anti-seepage system in domestic small reservoirs and consolidate the important position of the dam seepage control. the solution in the source reservoir dam seepage control of the application of deficiency is found out, the improvement measures is put forward. in different geological conditions, construction conditions and economic conditions, the selection of appropriate method and construction technology of seepage prevention system is obtained. Construction materials, construction process, equipment selection, etc aspect are took Innovative opinions. Join the chemical grouting as seepage control system improvement measures are put forward, the seepage control system can achieve the best effect of seepage control.