Construction method of composite ecological revetment

Abstract

The invention discloses a construction method of a composite ecological revetment. The construction method comprises the following steps that firstly, a first prefabricated block and a second prefabricated block are prefabricated; secondly, laying a first permeable unit at the bottom of the canal channel, alternately laying a first precast block and a second precast block on the first permeable unit, and filling gravels in the first water and soil exchange hole and the second water and soil exchange hole; laying a second permeable unit on each back surface of the U-shaped channel, and backfilling and compacting the second permeable units layer by layer; and thirdly, stacking the soil fixing units on the lowermost layer, and constructing each layer of soil fixing units in a staggered mode in sequence from bottom to top until the top elevation of the ecological revetment is higher than the flood control water level and lower than the canal bank. The first permeable unit, the second permeable unit and the U-shaped channel form a first-stage protection slope, the stepped ecological protection slope forms second-stage protection, the soil fixing effect is good, and the slope stability is improved. Meanwhile, the ecological revetment is of a stepped structure and is matched with the U-shaped canal, the occupied area of the two banks of the canal can be reduced, the slope of the revetment can be slowed down, and the anti-scouring capacity of the revetment is improved.

Description

technical field [0001] The invention relates to ecological slope protection, in particular to a construction method for composite ecological slope protection. Background technique [0002] In the process of modern urbanization, the population has increased dramatically, especially in densely populated areas, and the boundary space of canals (or ditches) has been continuously occupied. or ditch) gradually narrowed, resulting in the disappearance of the floodplain of the ditch. At the same time, as the river becomes steeper, the water quickly flows to the main river, which reduces the flood storage and detention function of the river. For this reason, ecological slope protection is designed on both sides of the canal to achieve the purpose of flood control and soil erosion, while taking into account the environmental greening and landscape. [0003] Existing canal ecological slope protection is usually constructed by on-site masonry. After the masonry is completed, turf is p...

AI Technical Summary

Problems solved by technology

[0004] First of all, the construction process is often accompanied by a large amount of earthwork excavation, which requires a large space to meet the construction needs. Not only is it difficult to meet the construction needs of small-space rivers and canals, but also the spoils are transported outside, which increases the construction cost; Masonry, the workload of masonry is heavy, the construction period is long and the construction efficiency is low;

[0005] Secondly, the existing ecological slope protection cannot perform water and soil exchange with the water body in the canal, that is, the water and soil exchange is insufficient, and it is difficult to meet the growth needs of plants, resulting in poor landscape effects and poor soil fixation effects. Especially in the early stage of slope protection, the soil erosion is more serious due to the erosion of rainwater;

[0006] In order to achieve the greening effect, holes are often opened on the hard blocks during construction. Due to the lack of soil stabilization measures in the holes, water and soil erosion of the soil after the wall is formed, posing a safety hazard;

[0007] Furthermore, water conservancy ecological slope protection often needs to slow down the slope. During construction, the river channel section (or ditch) with insufficient space is often made into a vertical hard retaining wall or pile foundation for permanent support, resulting in the hardening of the river (ditch) Linearization, loss of ecology and landscape

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