Dong Bai Jian Reservoir Reinforcement Design And Scheme Selection

Dong Bai Jian reservoir is located in Anyang County Lun Zhang Zhen Dong Bai Jian Cun northwest Zhanghe River tributaries, construction started in 1974, 1976 formally completed and put into operation. Built at the beginning without complete planning and design, only according to the dam site area topographic map simple deployment. The dam type selection after the start of construction, belonging to the design side, the side of the argument, edge built "trilateral" project. Due to the technical force is weak, coupled with the shortage of materials, engineering construction standards low, flood control capacity does not meet the specification requirements, dam filling quality is poor, the dam foundation leakage serious, long-term reservoir in the running state of the sick. There is an urgent need for danger reinforcement.This paper against the characteristics of small reservoir. On the basis of the preliminary work, to Dong Bai Jian reservoirs reinforcement many aspects of engineering design are studied, including:(1) reservoir for lack of hydrological data of the situation, the study by indirect method of design storm calculation, and Atlas method and flood peak modulus method the rationality carries on the contrast analysis, using the atlas to ascertain design flood;flood routing through that different frequency flood water level, discharge and storage capacity, according to the design of spillway and flood routing results on review of crest elevation.(2) the analysis and evaluation of Engineering address and hydrogeological conditions.(3) based on the current situation of the reservoir, the flood discharge, flood routing,crest elevation calculation selection proposed three improved flood control standard solution were chosen for comparison.(4) according to the specific circumstances of the Dong Bai Jian reservoir,combined with existing domestic anti-seepage engineering technical measures,proposed four dam foundation seepage control program is selected; and the dam engineering design and the stability check; at the same time the spillway, water conveyance tunnel engineering design.The study by hydrological calculation and checking derive Dong Bai Jian reservoir hydrological data and information, for design and scheme is selected to provide basis.Analysis of geological conditions, this paper draws a conclusion of dam foundation is along the second unit pebble leakage problem; on both sides of the spillway slope stability; water hole leakage serious conclusion. After some research in this paper recommended the spillway entrance properly digging, widening and crest new wave screens combined so as to improve the design of reservoir flood control standards and engineering; recommend the use of high-pressure swing spraying grouting as the dam foundation seepage control engineering design; reservoir for the existing problems of reservoir slope of the dam, spillway, water holes facilities for reinforcement design.Through the study of the Dong Bai Jian reservoir danger control and reinforcement,can from the accumulation of experience, summarize method is similar to the characteristics of the project for reference.