Method of channel occupation and foot protection construction using geogrid structure

Abstract

A geotechnical grid structure body comprises a geotechnical grid shell and filler wrapped in the geotechnical grid shell, wherein the filler is earth material or stone material. When the filter is the earth material, the geotechnical grid structure body is a grid soil pillow, and when the filter is the stone material, the geotechnical grid structure body is a grid gabion. A preparation method of the geotechnical grid structure body includes following steps: (1) selecting geotechnical grids appropriate in tensile strength according to use, and tailoring the geotechnical grids into pieces of the appropriate size; (2) colligating the pieces of the geotechnical grids so as to form the geotechnical grid shell; (3) filling the geotechnical grid shell with the filler, and sealing the geotechnical grid shell. The invention further discloses a method of using the grid soil pillow and the grid gabion for river regulation engineering attack and occupation and foot protection construction. The geotechnical grid structure body is used for the river attack and occupation and the foot protection construction. Sources and the number of the geotechnical grids are guaranteed. The geotechnical grid structure body is strong in corrosion resistance and ageing resistance, stable in quality, slight in settlement deformation and significant in engineering effect, and can effectively reduce construction costs, improve construction efficiency and save labor.

Description

technical field [0001] The invention belongs to the field of civil engineering, and in particular relates to a method for channel occupation and river management, in particular to a method for channel occupation and foot protection construction using a geogrid structure. Background technique [0002] In Ningxia's Yellow River governance, the dams have always used the grass-soil structure. A layer of soil and a layer of grass is used to roll into a roll with a diameter of 1.5-2.0m and a length of 7-10m. , lead wire cage or concrete tetrapod wrapping protection, and the layout types include spur dams, joint dams, stacks, bank revetments, etc. The structure is easy to obtain local materials and has a certain anti-shock capacity. It is a river control engineering measure generally adopted in Ningxia, and it is a simple and effective measure adopted in the continuous improvement and development of river control in the past dynasties. [0003] However, the problems existing in ri...

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Problems solved by technology

[0003] However, the problems existing in river channel encroachment construction using grass soil should not be ignored: ①The construction process is relatively cumbersome, especially the rolling and sinking links; ②The labor force required for each link of the construction is relatively large, and the construction efficiency is relatively low; ③ A large amount of rice straw is needed for the production of the bamboo body, but the price of rice straw is increasing year by year, and it is difficult to purchase; at the same time, the length of the straw is shortened due to mechanical harvesting, which brings difficulties to the production of the bamboo body and affects the quality of the bamboo body to a certain extent; It is long and needs to be paved in layers, so there are certain requirements for the site when making it, and the sinking has certain requirements for the slope of the terrain, which brings certain restrictions to the construction

⑤ The shrub is a cylinder with large volume and low rigidity. It is difficult to control the balance when the flow is large, and it is prone to bending, twisting and deformation of the shim, or it will roll upright or even be broken and washed away under the impact of water flow, which will affect the occupation project. quality and progress; ⑥During construction, a large number of people gathered on the limited working surface to push the dam, and the working surface was crowded, posing a great safety hazard; Cracks endanger engineering safety

However, if soaked in water for a long time, the lead wire is prone to corrosion and fracture. Over time, the gabion falls apart and loses its function of securing the slope, causing landslides

Concrete tetrapods also have certain problems: large material consumption and high unit price; concrete prefabrication needs to occupy a large area of ​​space, and prefabrication is greatly affected by temperature. When the temperature is low, insulation measures need to be taken to increase prefabrication costs; The construction speed is slow due to the throwing of the crane; the concrete tetrapod is easily damaged by the freeze-thaw cycle in the winter water level fluctuation area and denuded

In addition, river improvement projects are generally far away from the power supply network, and it is difficult to obtain electricity for construction, which makes the prefabricated site far away from the construction site and increases transportation costs

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