Method for filling bottom of gravelly soil core wall of stone dam

Abstract

The invention discloses a method for filling the bottom of a gravelly soil core wall of a stone dam. The method includes steps of firstly, casting a concrete key wall on a first diaphragm wall, reserving a reserved passage for construction vehicles to enter on the concrete key wall; secondly, filling clay 2 meters thick in a gap area of the inner side and the outer side of the concrete key wall; thirdly, casting the concrete key wall to the top after the construction vehicles enter a filling roadway; and fourthly, forming a plurality of clay loading platforms on a downstream side of a concrete gallery by clay, throwing the clay into the filling roadway by a backacting shovel, paving, grinding and filling by layering until the clay in the filling roadway is all filled and then the construction vehicles can be driven out from the top. By the above steps, filling construction of the bottom of the gravelly soil core wall of the stone dam can be realized. By forming the filling roadway convenient for filling by the concrete key wall, flow of high-ductility clay is limited, and layering, grinding and paving of the construction vehicles in the filling roadway are facilitated. The method has the advantages of simplicity in construction, convenience and practicality, investment is saved and construction quality and speed are guaranteed.

Description

technical field [0001] The invention relates to the construction field of water retaining structures in water conservancy and hydropower projects, in particular to a method for filling the bottom of a gravel soil core wall of a rockfill dam. Background technique [0002] The structural arrangement of the foundations of the two cut-off walls of the water-retaining dam is the first design in China. There is no precedent for the filling construction between the upstream cut-off wall and the downstream corridor in the closed filling roadway. [0003] The information that can be used for reference is that Chinese patent 200910058708.1 discloses a construction method for a high-plasticity clay core wall. The high-plasticity clay belt and the gravel core wall are rolled by a rolling construction method, and a thick rolling method is especially proposed. Concept, the existing problem is that due to the high plasticity and good fluidity of clay, the construction is difficult and the ...

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Problems solved by technology

[0003] The information that can be used for reference is that Chinese patent 200910058708.1 discloses a construction method for a high-plasticity clay core wall, which adopts a rolling construction method to roll a high-plasticity clay belt and a gravel core wall, and especially proposes a thick rolling method. concept, the existing problem is that due to the high plasticity and good fluidity of clay, the construction is difficult and the construction period is long

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