Earth and rockfill dam foundation geological defect silt squeezing replacement treatment method

Abstract

The invention discloses an earth and rockfill dam foundation geological defect silt squeezing replacement treatment method. High-throughput purification and buffer solution replacement equipment capable of achieving high-throughput production is provided. The earth and rockfill dam foundation geological defect silt squeezing replacement treatment method specifically comprises the steps that 1, a progressive construction mode is adopted, and a plurality of inverted filter material strips are sequentially laid on surface-layer high-water-content soft soil till silt squeezing replacement is completely completed on a geological defect dam foundation to form an inverted filter material layer; and 2, a cement mortar cushion layer is laid on the inverted filter material layer, and curing and leveling are carried out. According to the earth and rockfill dam foundation geological defect silt squeezing replacement treatment method, disturbed high-water-content soft soil on the surface layer of the dam foundation with geological defects can be effectively removed, the bearing capacity of the foundation is improved, stability of the dam foundation is guaranteed, and design and specification requirements are met.

Description

technical field [0001] The invention relates to the technical field of hydropower and water conservancy engineering, in particular to a treatment method for squeezing and replacing silt for geological defects of earth-rock dam foundations. Background technique [0002] According to the requirements of the design specification for roller compacted earth-rock dams, when there are geological defects such as faults and veins in the dam foundation of earth-rock dams, which affect the stability and deformation of the dam body and dam foundation, they should be properly dealt with. For the fully weathered faults, dikes and their affected zones developed in the dam foundation, it is generally considered to adopt trenching and pouring of reinforced concrete plugs, upper layer of reverse filter, filling of transition materials and compaction. For some projects, when affected by seasonal frequent rainfall, high water level at the dam base, water seepage from faults or dikes, the above-...

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Problems solved by technology

[0003] The purpose of the present invention is to overcome the influence of frequent rainfall or water seepage, etc. After the geological defects of the foundation of the earth-rock dam are excavated by trenches, there is always a layer of disturbed high-water content soft soil with a thickness of about 20 cm on the surface, which cannot be completely excavated, resulting in inability to To solve the problem of earth-rock dam engineering with conventional dam foundation treatment, a method of filling and squeezing silt for earth-rock dam foundation foundation defects is provided, which can effectively remove the disturbed high-water-content soft soil on the surface of dam foundations with geological defects, improve the bearing capacity of the foundation, and ensure The dam foundation is stable and meets the design and specification requirements

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