Construction method for filling and constructing earth stone dam by demixing dynamic compaction

Abstract

A stone dam demixing dynamic compaction filling construction method comprises the following procedures: (1) controlling the filling thickness of each layer of earth and stone between 10 and 20m; (2) adopting large-energy compaction dynamic force pre-pressing for increasing the density of the earth and stone material and eliminating the deformation of the earth and stone material; and (3) repeating the procedures (1) and (2), filling new earth and stone layer on the earth and stone layer after compression, and executing new compaction until when the height needed by the dam body is obtained. The energy for controlling the stone filling thickness and the adopted compaction dynamic force is calculated according to the following formula: D= alpha Mh / 10. Alpha is coefficient and is about 0.5-1.0 according to different soil. The invention has the advantages of overcoming the traditional bias, remarkably increasing the strength and modulus of the dam material, and greatly reducing the construction quantity and the project cost. The invention settles the problem that it is nonfeasible for eliminating the dam body descending with the conventional static force overloading prepressing method. The density of the earth and stone material is leaded to obtain the maximum, and the descending of the dam body after filling is evidently reduced.

Description

technical field [0001] The invention relates to a water conservancy construction method, in particular to a layered dynamic compaction filling construction method for an earth-rock dam. Background technique [0002] Earth-rock dam is a dam type often used in hydraulic engineering. Modern earth-rock dams are becoming bigger and higher, and the requirements for construction technology are getting higher and higher. The earth-rock dams currently under construction have reached the 200m level, and the maximum height of the earth-rock dams under planning and design has reached the 300m level. Due to the high dam body, during the construction period and operation period, the dam body will produce large settlement and deformation under the action of its own weight and water load, which will bring inconvenience to the operation of various facilities of the reservoir. [0003] In the treatment of soft soil foundation, the existing technology often adopts the method of overload prel...

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Problems solved by technology

[0007] In order to solve the above-mentioned problems of the prior art, the object of the present invention is to provide a layered dynamic compaction filling construction method for earth-rock dams, which can solve the problem of high earth-rock dams using traditional static overload preloading methods to pre-eliminate the dam body. Settlement is no longer feasible, so that the density of earth and stone materials reaches the maximum, and the settlement of the dam body is significantly reduced after the completion of filling

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