Laying of lines and pipelines
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When laying the pipeline, it may be necessary to run it underwater or in a stream, and in such cases hydraulic protection is required. How does one go about implementing this?
It depends on where and in what kind of water it is to be installed. For ordinary rivers, the method of stopping the flow of water, digging trenches, installing the device there, and adding weight blocks is used; the amount of weight that needs to be added has to be calculated first. After installation, hydraulic protection for the riverbanks is necessary, that is, slope protection measures are required. For large rivers, directional drilling is generally employed; if a continuous length cannot be drilled in this manner, then the method of digging trenches underwater, installing the device there, and adding weight blocks is used
The answer above is quite comprehensive; to add to the practical approaches used in current projects, one method is to use straw bags to protect the slopes on both sides after making a large excavation across the river.
The key is proper anti-corrosion treatment, as well as adequate cathodic protection
The answer on the second floor is quite comprehensive. As a supplementary point, when laying the pipes underwater, it is important to ensure that the burial depth is generally below 1 meter. Moreover, river courses often change in reality; therefore, even if there are embankments, there needs to be a long enough section of pipe after crossing the riverbed that allows for horizontal laying across it
In areas with rock, filling the trench directly with concrete yields excellent results. If it is an earthwork area, use grass bag concrete piled on top of the trench.