Design and construction method of a risk-relief reinforcement measure for suppressing embankment foundation piping

Abstract

The invention discloses a design and construction method of a risk-relief and reinforcement measure for suppressing embankment foundation piping. A barrier structure is arranged inside the embankment foundation on the backwater side, which is used to suppress the generation and expansion of concentrated seepage channels inside the embankment foundation; wherein, For the single-layer embankment, the barrier structure is arranged at the foot of the backwater side; for the double-layer embankment and the multi-layer embankment, the barrier structure is arranged at the impermeable covering layer and its lower layer Between the above-mentioned strong water-permeable layers, the barrier structure is located on the water-facing side of the weak part of the weakly-permeable covering layer on the backwater side; the material of the barrier structure ensures that it has sufficient water permeability and can effectively prevent the strong water-permeable layer. Particle loss in the soil; the material particle size of the barrier structure is determined by calculation; the barrier structure is ecological and environmentally friendly, and the cost is low; the construction is convenient and the reinforcement effect is good.

Description

technical field [0001] The invention belongs to the technical field of water conservancy engineering, and particularly relates to a design and construction method of a hazard-removing reinforcement measure for suppressing the piping surge of a dike foundation. Background technique [0002] Embankment engineering is an important foundation of my country's flood control system, and piping is the most common and most important danger in embankment engineering. According to statistics, during the basin-wide flood that occurred in the Yangtze River in 1998, there were 73,825 dangerous situations in the middle and lower reaches of the dykes, and 35.2% of them were in danger, of which 1,702 were in greater danger, and 51.2% were in danger. The practice of emergency rescue and reinforcement of dikes has shown that piping is the most common and difficult to cure confidant of dike engineering in my country. [0003] Although the traditional reinforcement measures such as vertical anti...

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Problems solved by technology

[0003] Although traditional risk-relief reinforcement measures such as vertical cut-off walls, relief wells, and embankment internal weight cover have good reinforcement effects, there are still many problems; if the cost of vertical cut-off walls is too high, it may also cut off the groundwater in the dike from the outside world. Exchange channels will have adverse effects on the groundwater environment in the embankment; decompression wells are prone to clogging, and the long-term operation and management costs are also high; heavy embankment cover will cause a lot of waste of cultivated land, and may also involve land acquisition and resettlement, and the implementation is extremely difficult

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