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Method for increasing the strength of a volume of soil, particularly for containing and supporting excavation faces

A technology of soil strength and excavation surface, applied in the direction of soil protection, construction, artificial island, etc., can solve the problems of cement mixture entry, high installation cost, damage to nearby buildings, etc.

Inactive Publication Date: 2006-12-13
URETEK SRL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

These pressures can cause the injected cement mixture to enter patches of soil far from its destination, causing considerable damage to nearby structures
Furthermore, the technique can only be applied to granular soils
These features, together with the high installation cost, considerably limit the application of this method in urban environments

Method used

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  • Method for increasing the strength of a volume of soil, particularly for containing and supporting excavation faces
  • Method for increasing the strength of a volume of soil, particularly for containing and supporting excavation faces
  • Method for increasing the strength of a volume of soil, particularly for containing and supporting excavation faces

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Embodiment Construction

[0059] specific implementation

[0060] refer to Figures 5 to 15 , the preferred embodiment of the method according to the invention illustrated in said figure includes the step of consolidating the sheet of soil for which the strength of all the various stresses required to be increased.

[0061] This consolidation step comprises a drilling step in which a plurality of mutually spaced injection holes 1 are substantially vertical or inclined with respect to the vertical direction, each hole 1 being in or close to the patch of soil 2 to be reinforced in the direction of the later excavation face 10 to be reinforced Sheets of soil 2 are produced on the exposed side. The exposed surface can be formed, for example, by an already carried out excavation surface or by the slope of a hill.

[0062] Injection holes 1 are created at a distance, preferably 0.10m to 2.00m (rarely variable), away from the excavated face 10 where the capacity is to be generated, or from the exposed surfa...

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PUM

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Abstract

A method for increasing the strength of a volume of soil, particularly for containing and supporting excavation faces, which comprises at least one reinforcement step that consists in producing a plurality of mutually spaced reinforcement holes arranged substantially vertically or inclined with respect to a vertical direction in the volume of soil to be strengthened; reinforcement elements are then inserted in the reinforcement holes and are locked within the soil by injecting in the reinforcement holes a synthetic locking substance that expands by chemical reaction. The method can optionally also comprise a step for consolidation of the volume of soil by injecting, in injection holes that are arranged vertically or are inclined with respect to the vertical and are formed beforehand in the soil, a synthetic consolidation substance that expands by chemical reaction.

Description

technical field [0001] The present invention relates to a method of increasing the strength of patches of soil, particularly soil containing and supporting excavated faces. More specifically, the method according to the invention allows for all kinds of stress modification to a portion (or strip) of said soil in a vertical position, or in a position slightly skewed from the vertical, containing or supporting an excavation face or a large mass of soil. By its strength, the soil portion is that which intervenes between the excavated volume and the natural sheet of soil left in place. Background technique [0002] More generally, the method according to the invention can be used to form a part (or band) of improved and reinforced soil within a patch of soil, for example for stabilizing or increasing slopes, vaults of tunnels or other situations (where the patch Soil tends to deform due to gravity or other forces, and internally produces failure surfaces) for stability and safe...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E02D3/12E02D29/02
CPCE02D3/12
Inventor C·坎特里
Owner URETEK SRL