Reservoir Capacity Of Impervious Engineering Design Analysis And Research

In recent years, domestic water conservancy project construction into a period of rapid development, to improve the utilization of water resources in shandong province, the New Year, reinforcing a dozen large and medium-sized reservoirs. But whether it is new, and consolidate compatibilizing, dam seepage control design always is a top priority.Dam seepage generally appear as three conditions:the leakage of dam foundation seepage and leakage of the dam and spillway construction. This once appear, a kind of three common conditions, he said there was a problem in the quality of the reservoir, under the certain conditions will influence the safety of the project, the safety of the reservoir evaluation level is reduced.So, completes the seepage control design, is the basis of reservoir design, is also a primary criterion to evaluate the reliability project.Reservoir and consolidate or expansion projects, involving new and old dam body combination, building is combined with the dam, seepage control design does not reach the designated position will directly affect the engineering safety, and endanger the downstream people's property safety protection area. In this article the author ridge east reservoir capacity expansion project as an example, after the reservoir capacity of the total capacity of 11.48 million m3, irrigation capacity of 8 million m3, die capacity of 300000 m3, is a medium-sized reservoir comprehensive functions such as flood control, water supply. Combining with the main buildings include dam, spillway, and management facilities, etc.Due to historical reasons, the status quo of the small reservoir dam filling quality does not meet the specification requirements, through the review of the seepage control design calculation, considering the status quo of small dam under the condition of impact on the dam safety, after heightenning dam under various conditions of stability safety coefficient can meet the specification requirements. On the premise of ensure the safety of engineering, the comprehensive comparison, the dam heightening recommended from small downstream of the dam slope heightening dam plan now.Dam axis is selected on the basis of the original ridge east dam heightening expansion. After the expansion of the dam is divided into two parts:the middle dam section to use the small reservoir dam heightening dam section, for the new dam section on both ends. Dam ends respectively connected with on both sides of the hill.Selected dam layout schemes to compound geomembrane anti-seepage concrete impervious wall and clay core wall as two than the alternative, the GEO-studio software seep/w module calculation, in combination with the hydrological and geological data, working condition of the unsaturated soil seepage situation for the accurate analysis and calculation.Canada's GEO-studio software seep/w module is a used for unsaturated soil seepage analysis software, its theoretical basis is saturated-unsaturated flow, to calculate the steady and unsteady seepage calculation, so of DAMS, reservoirs and other projects both at home and abroad is widely used in the calculation of seepage. The adoption of global and unstructured grid density of network partitioning, can automatically to the finite element discretization network of the study area, calculation accuracy and precision can be effectively guaranteed.Loam core wall in view of the status quo of the small reservoir dam filling quality is poor, composite geomembrane inclined wall dam scheme has certain security hidden danger, although the investment is bigger, and the clay core wall dam built new clay core wall according to the current standard design, construction, seepage control effect and reliable, therefore, the clay core wall dam is recommended for the solution.This paper introduces in detail the structure of the scale, the selection of dam site, the layout of all buildings and scheme comparison, the process of comparison and calculation of the dam type. Through scheme comparison and repeated calculation, expounds the author's research results of seepage control design, as well as seepage control design in the engineering application and function.