Composite type siltbeach dam body engineering technology

Abstract

The present invention provides the principle of hydraulic energy dissipation by combining force potential energy, gravity potential energy and water flow cutting potential energy for silt beach dam engineering, and builds a hydraulic horizontal weir physical and chemical composite with large cross-section full-elevation water discharge and diversion flood control performance. The method is to raise the outer edge of step-shaped discharge sills such as stones with single-surface heightening by 1:0.15 of its own width, shrink by 1 / 4 of its own width, and lie on its side on the ground bed (including horizontal weir nipples). Lun cloth apron and shark's fin barbed wire wrapped stone or cement pre-manufactured between the apron) and the sand weir (including interlayer nylon cloth). Rolling dam equipment consists of wooden pole triangle brake frame, wooden pole parallel brake pads and plastic sheet parallel series apron. The Shunshui weir is a sandy soil structure, and the flood diversion outlet is a physical and chemical combination structure of a sill apron. The invention integrates farmland water conservancy, water and soil conservation, soil improvement engineering and sustainable development and utilization of dynamic water resources, with low cost and high economic, ecological and social benefits.

Description

technical field [0001] The invention relates to farmland water conservancy, soil improvement, water and soil conservation and agricultural environment protection systems, in particular to intensive control of basic farmland and lost water and soil, and sustainable development and utilization of dynamic water resources. Background technique [0002] The basic working principle of the flood diversion and silt diffusion of the original silt dam engineering technology is to use the grid weir to store water and the water outlet at a certain height to store the sediment layer and drain water, use the rolling dam to raise the water level of the river channel, and input the flood into the grid weir through the gate. The grid weir is composed of Shunshui stone dam, gate, Hengsha weir (with water outlet). The length of the discharge section of the gate and the water outlet is roughly the same, with a maximum of 2-4 meters. Shunshui stone dams and gates take into...

AI Technical Summary

Problems solved by technology

The opening and closing of the gate requires manual operation

Although its engineering technology adopts modern mortar hydraulic structure, due to its rigid structure and huge cost, the principle application is superficial, the performance is out of touch with each other, and the practicality is at the expense of the other. The contradiction between construction and investment is prominent, and it is difficult to adapt to the flow field environment and the intense time and space. changes, still following the ancient traditional engineering mode mainly based on dredging

In order to reduce the project cost, a large number of capital-saving measures were taken to reduce the discharge section of the gate and grid weir, which not only increased the hydraulic mechanical energy and destructiveness, but also seriously lost the probability of silting. From the point of view of qualitative change caused by quantitative change, the influence of grid weir Lihong energy ratio and volume adjustment capacity are negligible, resulting in blockage and separation

Determined by its backward technical characteristics, the use of flood development, land transformation and general irrigation in mountainous and hilly areas has not been effectively solved for a long time. Water, soil, fertilizer and sand resources cannot be stored and utilized locally, but are distributed over a wide watershed. It is lost in vain and gathered in the downstream, causing serious disasters and major hidden dangers to the survival and production of the people. Many natural laws that can be used can be fully and synchronously utilized. The difficulty, narrowness, long-term and repeated nature of engineering measures in the implementation Sexuality has been plagued by rapid increases in soil and water management productivity levels