A bank revetment structure and its construction method

Abstract

The invention provides a coastal reservoir land reclamation type bank protection structure. The coastal reservoir land reclamation type bank protection structure comprises earth-filled interface steps, water-permeable earth-filled layers and water-impermeable earth-filled layers, wherein the earth-filled interface steps are arranged along a bank protection foundation slope surface; each water-permeable earth-filled layer is arranged on the corresponding earth-filled interface step in a covering manner; and each water-impermeable earth-filled layer is arranged on the corresponding water-permeable earth-filled layer in a covering manner. The water-impermeable earth-filled layers are arranged into a multi-level step structure along the bank protection foundation slope surface from bottom to top. A water-permeable earth-filled layer is also arranged at the whole bottom of the water-impermeable earth-filled layer step at each level. Anti-seepage geotechnical cloth is arranged between each water-permeable earth-filled layer and the corresponding water-impermeable earth-filled layer. The water-permeable earth-filled layers are formed by being filled with sand gravel. The water-impermeableearth-filled layers are formed by being filled with a viscous soil body in a layered manner. By means of the coastal reservoir land reclamation type bank protection structure, the land-filled structure which guarantees stability of a coastal reservoir bank slope and meanwhile newly increases land is formed; the geological environment of a coastal reservoir region is effectively protected; and exploitation and utilization of bank slope land resources are promoted.

Description

technical field [0001] The invention relates to the field of bank revetment design and construction of a coastal reservoir, in particular to a bank revetment structure and construction method for a coastal reservoir. Background technique [0002] In the past 30 years, in order to vigorously develop hydropower resources, take into account flood control needs and regional water resources allocation, a large number of large and super large reservoirs have been built. According to incomplete statistics, 80-90% of reservoir landslides are related to reservoir water activities, and bank slope damage is related not only to the material structure of the bank slope, but also to changes in the ocean water level of the reservoir. According to preliminary statistics, there are a large number of urban market towns in my country's coastal reservoirs, such as Badong, Zigui, Yichang, Wushan, Fengjie, Kaizhou, Yunyang, Wanzhou, Zhongxian, Fengdu and other more than 60 urban market towns in t...

AI Technical Summary

Problems solved by technology

However, in order to control the river regime and the flood control safety of the coastal reservoir, the slope-type revetment structure in the prior art focuses on the structural design of using hard materials such as block stones and concrete, which leads to serious revetment hardening, and the hardened revetment structure destroys the river bed. The connection with the river bank ecosystem cuts off the contact between the organisms and microorganisms in the water and the land area. At the same time, the hardened river bank prevents the growth of aquatic plants and seriously affects the ecosystem of the coastal reservoir. In addition, the conventional hard revetment structure also Potential transfer of scour and erosion problems, weakening the ability of coastal rivers to reduce flow energy and causing more severe erosion downstream

[0004] Aiming at the stability and safety of the bank slope in the project control area, the design and construction of bank slope protection engineering from the perspective of geological disaster control is the only technical path for the prevention and control of bank slope geological disasters at home and abroad. However, the control project cannot meet the development and utilization of land resources in the control area. Even bring many unfavorable factors to the follow-up urban infrastructure construction

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