Mudstone ecological slope protection structure of columnar geogrid foundation bed

Abstract

The invention discloses a mudstone ecological slope protection structure of a columnar geogrid foundation bed. The structure is used for a riverway with the flow rate of 4.0 m / s or below and comprisesa layer of rock blocks laid on a slope surface of the riverway at intervals, soil is filled among the rock blocks, the columnar geogrid foundation bed is buried in the soil, herbaceous plants are planted in the soil, and the soil content of the soil is 50-60%. The structure has the advantages that the quantity of the rock blocks is small, the influence on the environment is small, the rock blocksare arranged randomly, the soil content among the rock blocks can reach 60%, the quantity of the rock blocks is small, and the influence of rock block mining on the ecological environment is reduced.The anti-scour effect is good and the manufacturing cost is low. A geogrid is embedded into a soil body in a columnar shape, and the embedding and fixing effect like a soil nail is achieved. The geogrid is wound with plant root systems, and a rock block framework is added for supporting, so that the scour resistance of a slope protection is remarkably improved. The geogrid is low in cost, so thatthe total manufacturing cost is not high. The structure is suitable for a slope type bank slope protection with the designed flow rate smaller than 4 m / s.

Description

technical field [0001] The application belongs to the field of water conservancy engineering, and in particular relates to a mud-stone ecological slope protection structure for a columnar geogrid foundation bed. Background technique [0002] There are many rivers in our country, and the history of water control has a long history. Flood control and security have always been an important task for people's livelihood in all dynasties and generations. In order to ensure the safety of the embankment under the erosion of water flow, embankment protection is a necessary engineering measure. Since modern times, with the increasing pressure from population, resources and environment, and the improvement of technological capabilities, the solidification and hardening of river embankments has become a trend for a while. Subsequently, human beings' understanding of the environment and ecology has made significant progress, the construction of ecological civilization has become the mai...

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Problems solved by technology

However, the wicker structure is arranged horizontally, and the wicker must be submerged under water for a long time before it rots. This structure of wicker does not reflect the slope-fixing function of plants.

[0005] Chinese patent application (2014101000028) discloses a construction method for gabion ecological gabion river channel slope protection: in the slope protection construction stage, after the gabion slope protection construction is completed, refill and water with soil in the gaps between the surface layer blocks, Ensure that the soil fills the gaps between the rocks, so that a layer of cultivated soil is covered on the rock slope protection; and with this layer of cultivated soil as the base bed, aquatic plants are planted under the water surface, and lawns are planted on the river bank to realize plant slope consolidation and ecological protection. Enhanced function; the technical key point of this patent is to play the role of gabions, and connect the blocks with gabions to form a structure with a higher anti-scouring flow rate, rather than the role of plants to stabilize the slope. At the same time, the structure is economical. Considering the high investment per linear meter, it is difficult to widely promote

However, the price of geotextile bags with anti-corrosion and anti-shock characteristics is relatively high. At present, raw materials are mainly imported, and the project cost is relatively high.

At the same time, the structure requires that the rocks in the lower layer of the bagged soil should be closely arranged and built by masonry. The porosity between the rocks is relatively small. Depends on bagged soil and plants

Chinese patent application (2019108737470) discloses an ecological remodeling method and ecological remodeling structure of urban hardened revetments. The structure is to cultivate plants on the built rock layer with soil, and does not organically mix the rock and soil , only a layer of plant protection is covered on the surface of the stone, and its anti-scour ability mainly depends on the anti-scour ability of the surface plants. If the anti-scour ability of the surface plants is exceeded, the upper soil layer will be washed away by the water flow, and the ecological layer will also be damaged.

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