Saving type ecological slope protection device and construction method thereof

Abstract

The invention provides a saving type ecological slope protection device and a construction method thereof. The saving type ecological slope protection device is used for being arranged on river channel side slopes on the two sides of a silt soil river channel and comprises supporting piles, a bamboo raft protection slope and a fixing mechanism, wherein the supporting piles are fixedly inserted into the slope toes of the river channel side slopes; the bamboo raft protection slope is laid on the river channel side slopes and formed by splicing a plurality of bamboo raft plates; the bamboo raft plates are of a net-shaped flat plate structure woven by bamboo chips; the lowermost end of the bamboo raft protection slope is fixedly connected with the supporting piles in the extending direction of the river channel, and the uppermost end of the bamboo raft protection slope is higher than the designed water level of the silt soil river channel; the fixing mechanism comprises an inserting and clamping piece; and the inserting and clamping piece is inserted into the river channel side slopes to fix the bamboo raft plates to the river channel side slopes. The saving type ecological slope protection device can protect soil of the river channel side slopes, is simple in structure, convenient to construct and low in manufacturing cost, meanwhile provides a habitat for aquatic organisms in the river channel and is beneficial to river channel water quality purification.

Description

technical field [0001] The invention relates to the technical field of water conservancy engineering, in particular to an energy-saving ecological slope protection device and a construction method thereof. Background technique [0002] In the Yangtze River Delta, Pearl River Delta and other areas, it is mostly alluvial plains, where loosely deposited soil bodies of the Quaternary system are widely accumulated, and silty soil and sandy soil are distributed on the surface. For example, the second layer of soil in Shanghai is shallow silty soil and sandy soil. When the river channel slope is silty soil or sandy soil, when the soil body is soaked and saturated by water, the hydrophilic colloid particles in the soil particles absorb water and swell to reduce the density of the soil particles. When the water pressure exceeds the gravity of the soil particles, the soil particles will be suspended and flow, which will form quicksand. There is a silt interlayer in the soil layer, a...

AI Technical Summary

Problems solved by technology

Generally, the anti-scouring ability is poor; the main problems of river slopes are seepage stability, anti-sliding stability and anti-scouring

After the excavation of the river channel, the permeable bank slope under the water will bear the buoyancy and erosion of the water; the water level of the river channel in the project area often fluctuates during the flood period, or the tide rises and falls. When the bank slope water level drops suddenly, Due to the lag of the dynamic change of the groundwater level, it is easy to generate a large osmotic pressure, which has a certain adverse effect on the stability of the embankment and the river slope. At the same time, the water flow continuously scours the slope. It is easy to flow, which accelerates the soil erosion of the slope, thereby affecting the stability of the slope, and also increases the workload of river dredging. For example, in Shanghai, the river needs to be dredged every 3 to 4 years, which is a waste of time and money. A large amount of silt cannot be handled After dredging, the erosion of the slope is intensified, forming a vicious circle, and continuously affecting the stability of the slope

[0003] In addition, if the current urban river slope adopts hard slope protection, the investment will be increased, and it will not be conducive to the growth of aquatic organisms. When the pollutants in the river increase significantly, the consumption rate of dissolved oxygen will be faster than the natural reoxygenation rate of the river surface, so aerobic and Facultative microorganisms gradually die out, the river channel loses its self-purification ability, and the dynamic balance of the river channel pollutant concentration is destroyed, so the black and odor phenomenon of the river channel will appear

At present, masonry slope protection and concrete slope protection are usually used in silt soil river courses. The biggest disadvantage is that they are only designed and constructed from the perspective of satisfying the basic functions of river flood control, drainage, shipping and water diversion, ignoring the relationship with the river. The survival and development of animals, plants and microorganisms as a whole, rarely considering the impact on the environment and ecology

This type of revetment is easy to damage the ecological function of the river and cause the deterioration of the ecological environment of the river.

[0004] To sum up, there are two main problems in the current silt soil river course. One is that this kind of slope is easy to be scoured by water flow, and the water and soil loss is serious; the other is that the ecological slope protection adopted for the current situation of this kind of river course is complex in construction and high in engineering cost. , Difficulty in later maintenance

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