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Ground improvement method

A foundation and construction method technology, applied in the direction of foundation structure engineering, soil protection, filling, etc., can solve the problems of low aid evaluation of foundation soil stability, improper shape, configuration, and no consideration of limiting effects, etc., to achieve effective use of construction Investment, high improvement effect, high cost effect

Inactive Publication Date: 2011-05-04
NOM +2
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  • Application Information

AI Technical Summary

Problems solved by technology

[0019] In addition, the foundation soil whose free deformation is restricted by the improved body exerts greater rigidity and strength due to its reaction force, but the restriction effect is not considered, but the strength-deformation characteristics of the state where the foundation soil can freely deform are used for design, Therefore, the evaluation of the suppression of deformation of the foundation soil and the contribution to stability is too low
[0020] As a result, it may become a design that places emphasis on safety, and the shape and arrangement of the improved body may be inappropriate, and there is a tendency for uneconomical design and construction.

Method used

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Embodiment Construction

[0079] Next, an embodiment of a method of determining the arrangement of improvement bodies will be described with respect to the ground improvement method of the present invention. Here, although embodiment of this invention shows the best form, this invention is not limited to this.

[0080] For example, in addition to the improvements constructed by stirring and mixing the foundation soil and solidified materials such as cement or cement, the improvements described here also include crushed stones and gravels that are inserted into the foundation and replaced with the foundation soil. Columns, gravel columns. In addition, the construction method (construction method) of the improved body may be either a mechanical agitation mixing method in which the solidified material is discharged into the soft ground and stirred and mixed, or a high-pressure jet agitation method in which the solidified material is sprayed by high-pressure rotation, and used for construction. Specific m...

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Abstract

Provided is a ground improvement method requiring a lower cost by evaluating the confining effect of the ground soil appropriately and arranging improvement bodies rationally. A ground improvement method comprises the step of creating improvement bodies in the ground by arranging such improvement bodies (1) as confining deformation of the ground when the ground begins to be deformed by receiving a load. A variation in stress of the ground soil of when deformation is confined by the improvement bodies (1) is determined, and the variation of at least any one of the strength or rigidity of the ground caused by variation in stress is evaluated as the confining effect of the ground by the improvement bodies (1). Subsequently, the shape and arrangement of the improvement bodies (1) are determined such that the ground can attain the confining effect. Variation in stress is evaluated as the variation of at least any one of the direct stress or shearing stress produced as a reaction to confinement by the improvement bodies (1) when the ground receives a load.

Description

technical field [0001] The invention relates to a ground improvement method for building an improved body in the ground. [0002] As a method of constructing the improvement in the foundation, there is a method of stirring and mixing the foundation soil and the solidified material, but the specific method of constructing the improvement in the present invention is not particularly limited. Background technique [0003] In the conventional ground improvement method of constructing an improved body on the ground, as a method of determining its layout, consideration methods such as a method of applying a composite foundation and a method of structures as described below are roughly divided. These methods are not the ones proposed in the present invention that take into account the effect of the ground being limited by improvements or the like. [0004] The method of the composite foundation is a method of treating the strength of the improved body and the strength of the found...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E02D3/12E02D17/18
CPCE02D3/12
Inventor 大河内保彦三木博史牧野昌己
Owner NOM
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