|
|
|
|
|
|
Keller's Vibro Replacement method of constructing stone columns through fill material and weak soils, to improve their load bearing and settlement characteristics, provides an economic and technically sound solution to a wide range of geotechnical and foundation problems.
To construct the stone columns, the vibrator is allowed to penetrate to the design depth and the resulting cavity is filled with hard inert stone, free of clay and silt fines. The required interaction between the stone columns and the surrounding soils, is developed by the stone infill being introduced and compacted in stages, each charge of stone being thoroughly compacted.
The stone columns and the confining soils form an integrated foundation support system having low compressibility and improved load bearing capacity. In cohesive soils, relatively rapid consolidation is achieved through excess pore water pressures being readily dissipated by the stone columns.
The stone column layout can be arranged to suit varying combinations of load, soil type and required settlement performance. In general, column spacings are in the range of 1.2 to 2.3 metres beneath main load bearing foundations, and up to 3.0 metres beneath floor slabs.
|
|
|
The improvement of poor soils by depth vibrators is an innovation of Keller. For the treatment of non-cohesive and cohesive soil formations different types of depth vibrators and various techniques are available. Together with the different methods of soil improvement a wide range of pile foundations and similar foundation techniques are available.
|
|
Originally used for improving loose, granular soils, these techniques have been improved by SOLETANCHE BACHY to extend their range of suitability from loose granular soils to poor cohesive soils in which stone columns are built by the wet or dry method.
The dry stone column technique uses the SolVibro® machine, the latest innovation from SOLETANCHE BACHY .
The SolVibro poker is vibrated into the soil to final depth and then withdrawn in steps while sand or gravel is added under the tip to compact the ground. The operation is repeated over the site to install the required pattern of columns.
The ground improvement effect can be followed in real time with the special monitoring system incorporated in the SolVibro® machine.
|
|
Stone columns, also known as vibro-replacement, are a soil treatment that involves deep vibration and adding stone to the ground.
Applicable to very soft to medium soft silty or clayey soil treatment and heterogeneous backfill improvement.
Stone columns can be either wet or dry installed.
Nowadays, except in very specific cases, the dry method is used, where vibration drilling is performed with compressed air. No water is required so that sludge management is no longer necessary and the need to maintain the esplanade is drastically reduced. Furthermore, the stone is inserted through the vibrator, so that the operations of removing and reinserting the vibrator are avoided, as well as guaranteeing that the column is suitably continuous.
|
|
Mortar Columns
Mortar Columns are produced by vibrating a lance into the soil. Then, the void is filled without pressure by the vibrator lance with mortar.
|
|
Ballastées columns
The ballastées columns are put in %u0153uvre in grounds being able to offer a certain lateral confinement to the column. These columns cannot in no case to be installation in grounds undergoing of the voluminal deformations during time (recent fill, mud-bound peats, vases, clays, organic grounds anthropiques%u2026).
We employ the technique of the hopper vibrator. The method for realization d%u2019une column is the following:
The vibrator is descended to l%u2019aide d%u2019un fluid from launching jusqu%u2019à the qualified layer and the ballast is conveyed jusqu%u2019à the base of the vibrator with l%u2019aide d%u2019un side tube. The column is then built by the compaction of the ballast by going up master keys of 0,5 m height l%u2019ordre.
This technique allows, inter alia, to reduce compressings of l%u2019ouvrage but not to remove them.
|
|
Definition:
structuring of the basement by incorporation of gravel columns compacted by beating or vibroflotation
Characteristics:
the diameter is determined by the ground, with the means 20à25% larger than the tube of beating
entredistance starting from 2m, maximum 3m.
foundation rafts simpler than to erase on piles
the characteristics of bearing pressure are higher by beating
Scope of application:
foundation of the tanks and storages
economic solution for light constructions on ground compressible
improvement of the stability of a slope
faster consolidation under considerable fill
|
|
Columns are timeless architectural elements broadly used in classic facades. Weser columns are decorative elements which can be used as structural situations if necessary. In this case, they must be filled with reinforced concrete.
Where square capital are needed, Weser offers 3 dimensions: 25 x 25 - 30 x 30 - 40 x 40
|
|
Columns are timeless architectural elements broadly used in classic facades. Weser columns are decorative elements which can be used as structural situations if necessary. In this case, they must be filled with reinforced concrete.
Where square capital are needed, Weser offers 3 dimensions: 25 x 25 - 30 x 30 - 40 x 40
|
|
| ... products without information |
| |
|
|
