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Jianshui expansion of the old Red Hill Reservoir Design and Benefit Analysis


Rock perfusion 1:0.5 slurry. Qualified 525 Portland cement with cement. Irrigation from the irrigation section of the hole concentration in the former ∞ value size. Transformation of the slurry in accordance with Filling quality check: After grouting, the water fills the reservoir is not before the grouting quality check only a random drawing four holes to check for l8 months Paragraphs by injection test, the ∞ values were lower than the design requirements 5Lu, pass rate of 100% (its biggest ∞ is 2Ln, the smallest for the 0.6Lu, average 0.8Ln). In addition, core removed from the inspection hole to see a better consolidation of slurry filling pulse. Grouting: Reservoir filling the end of September 1997, l2 months to meet the design water level, the two abutments of the original shares disappears like water, without wetting the entire dam surface phenomenon. After 4 years of normal operation of the expansion design is reasonable proof of Danger, the construction quality met the design requirements. 4.2 Since the original dam dam structure reinforcement design is not standardized, dam body thin, after a steep slope. According to design, increasing the height of the dam height to be 2.5m, crest elevation from the original 98. O0rn increased 100.5rn, dam height increased 37.2rn, crest length 150rn, crest width of 6.0m, the design water level is 99.0rn. From the original design capacity of 1.04 million increase to 76 million m3, the reservoir size becomes smaller by the d ,(---) type (I) type. Calculated through the stability analysis, design size of the dam structure: the upstream slope 1:2.25, according to the original extension of the high slope and the laying of homeopathic C15 Precast Concrete block revetment, precast blocks thick 0.8rn. The end of the body based filter design elevation 62.0rn, filter body top elevation 74. O0rn, filter out the body based on widening 16rn, top out widening 14rn. Downstream slope for the three slope segments, from top to bottom, respectively 1:1.5,1:2.25,1:2.5. With the elevation 96.73rn Department - closure units, width 3.88m (Red Mountain Park, reroute channels, the use of reinforced concrete aqueduct from the opposite direction by the stage), the elevation 84. O0rn has a closure at the station, wide 2.0rn, done sod revetment slope, the design of the dam surface drains. Amount of major projects: excavation earthwork 64O4m3; dry hair puzzle Stone 3039.5m3; dam backfill earth 185OOm3; 75 square 323.37m3.5 masonry cement sand reservoir capacity for the benefit of the original 76 million m3, with a risk due to run,[link widoczny dla zalogowanych], water only 40 million m3, reservoirs can not be fully effective, but there are serious security risks, the benefits of Danger expansion mainly in the following areas: 5.1 less investment program as a reasonable design optimization, engineering decrease in investment, project dealing with a total investment of 119.3 million. Among them, the dam reinforcement project 928,[link widoczny dla zalogowanych],000 yuan, 265,000 yuan dam grouting. 5.2 irrigation,[link widoczny dla zalogowanych], flood control benefit from the d ~(---) reservoir upgrades for the small type (a) type, design capacity from the original 74 million increase to 1.041 million m3, a net increase of capacity of 301,000 m3 . Reservoir has been fully effective, compared with the untreated water reservoir effectively increased 1 percent. 6 Conclusion (1) Jianshui old Red Hill Reservoir expansion project in January 1997 to June 1997 end. From the end of the project so far, the normal operation of reservoirs to meet the design requirements of 4 years. Observing from the outside slope were normal, the dam water is functioning correctly. Reservoir expansion of facilities to be successful. (2) the treatment of disease works, we should first find out the cause of disease, and according to engineering geology, construction and other original works careful analysis, feasibility studies,[link widoczny dla zalogowanych], a reasonable treatment options, making it a smaller investment, to achieve maximum benefits. (3) patients for the original reservoir, in dealing with dangerous at the same time, according to topography, hydrology, careful analysis of geological conditions, conditions can be set up the expansion of the reservoir, increasing reservoir of irrigation, urban water supply benefits. (4) expansion of the reservoir water storage investment 1.15ffJm3. Investment in new reservoirs generally 5 to 7 yuan / m3, so the increase can be dangerous reservoirs, while the expansion of treatment,[link widoczny dla zalogowanych], with better economic benefits. (5) the success of the project for the construction of similar projects to provide a good reference. [
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