The influence depth of ric is typically around 5 to 6 m 16 to 20 ft although this is depending on several issues such as soil type, degree of saturation, soil stiffness and other factors. Technology fact sheets technical bibliography design procedures specifications cost estimating tools qcqa procedures photographs case histories 50 technologies. The procedure of the assessment of the damage potential. The ric closes the gap between surface compaction methods e. Rapid impact compaction ric rapid impact compaction densifies shallow granular soils, using a hydraulic hammer, which repeatedly strikes an impact plate on the ground surface. Effective improvement depth for ground treated with rapid. This website offers an overview of bsps products, services and global capability.
Design of rapid impact compaction at the new yogyakarta international airport 39 mathew sams, wei he, jeremy gamaliel, and barry kok effects of model scale due to displacement factor for nailedslab pavement system 49 anas puri initial recommendation criteria for distinguishing between landslides 54. About soil compaction soil compaction soil compaction is defined as the method of mechanically increasing the density of soil. Slovak university of technology, faculty of civil engineering. Rapid impact compaction ric was specified to densify the sand layer, thereby increasing the factor of safety against liquefaction to be confirmed using standard penetration testing spt. In this technique, ground improvement is achieved by impacting the ground with a 7 tone weight, 35 timesmin, and drop height of 0. Rapid impact compaction ground improvement advantages. Dynamic compaction an overview sciencedirect topics. Pdf ground improvement using rapid impact compaction. Improvement in physical properties for ground treated with. The ric is a dynamic compaction device for middledeep ground improvement based on the piling hammer technology used to increase the bearing capacity of soils through controlled impacts. Impact at depth repeated loadings first pass does 80% of total compaction repeated loadings increase compaction. Surface compaction including rapid impact compaction. Rapid impulse compaction technology makes it possible for improving the ground physical properties, especially when the large thickness of noncohesive material layers is considered. Geostructures used a combination of rapid impact compaction ric and geopier technology for support.
Vibration induced by rapid impact compaction on granular soils. Bre seminar february 2004 ground treatment a reality. This paper presents results of experimental and numerical studies concerning the dynamic effects of the rapid impact compactor ric on its environment. Evaluation the effectiveness of rapid impact compaction. The results of the densification are generally, in canada, confirmed through the use of standard penetration tests spts, performed as per astm d1586. Rapid impact compaction, which is the core of this paper, was developed in early 1990s by british sheet piling in conjunction with british army as an improvement on the process of deep dynamic compaction. This price shall include all materials, equipment and labour and all work incidental thereto, including but not limited to. Rapid impact compaction and rapid vibro compaction. Densifications of the soils within the specified zone. This action leads to a deeper and homogenous compaction effect. The rapid impact compactor is a dynamic compaction machine based on the technology of the piledriving hammer. Rapid impact compaction densifies shallow, granular soils, using a hydraulic hammer, which repeatedly strikes an impact plate on the ground surface. The impact of rapid impulse compaction ric of large non. Electric pulse compaction densification of granular soil using the shock waves and energy generated by electric pulse under ultrahigh voltage.
It works by imparting dynamic energy through a falling dropweight. Energy is transferred to the underlying loose granular soils rearranging the particles into a denser formation. R06c rapid technologies to enhance quality control on asphalt pavements r09 managing risk in rapid renewal projects r10 innovative strategies for managing complex projects r19a designing and preserving bridges to achieve a 100. Short course on ground improvement and foundation design. V can be interpreted as the volume of grains disturbed in the collision, vd. Pdf vibration emission induced by rapid impact compaction. In construction, this is a significant part of the building process. Rapid impact compaction densification technique vibro.
Pdf performance of rapid impact compaction as a middledeep. Concept and parameters related to ground improvement. Rapid impact compaction ric is a quick and reliable form of soil compaction improvement. Ric rvc rapid impact compaction and rapid vibro compaction. Ground improvement without admixtures in noncohesive soils or fill materials a5. Dlvricme watch these two videos about ground improvement by means of rapid impact compaction. To evaluate the usefulness of this technique in the arabian gulf region, the ric is used to. Evaluation the effectiveness of rapid impact compaction ric. Maximum contact pressure that limits settlement and provides sufficient fs against bearing capacity failure bearing capacity. Jun 03, 2011 the rapid impact compactor has been used to successfully compact a wide range of both placed and in situ granular materials, including rockfills, as well as to stabilise naturally occurring loess sand and silt deposits in seismic zones. Ground improvement has been used on many construction sites to densify granular material, in other word, to improve soil properties and reduce potential settlement.
Method invented and developed by menard company in late 1960s dynamic compaction has been used on the numerous sites all over the world for various soil conditions and for a variety of applications such as. Ric is rapid, cost effective and can reach challenging locations charels and. Partial depth vibro compaction or replacement shallow influence associated with lower energy methods such as the rapid impact compaction or shaped roller techniques. Rapid impact compaction video ric middle east youtube. Dgs developed the ric9000 specifically for multipurpose foundation work. Vibration emission induced by rapid impact compaction d.
The technique uses a hydraulic hammer and an anvil to densify granular soils at less depth than with a caterpillar crane. During the compaction the structured drum shape provides a constantlychanging direction of forces and results into a kneading effect of soil. Rapid impact compaction ric provides liquefaction mitigation by densifying potentially liquefiable soils through the use of controlled dynamic compaction. Rapid impact compaction ric merupakan salah satu metode perbaikan tanah secara mekanik untuk tanah granular. Liquefaction mitigation using rapid impact compaction and. V from negative compaction to positive dilation indicates that the. Rapid impact compaction is effective for compacting existing soil that would otherwise have to be excavated and compacted using a. Dynamic energy is imparted by a falling weight dropping from a controlled height onto a patented foot. The compaction of near surface granular or mixed soils, can be achieved by the introduction of high frequency energy impacts, using our rapid impact compaction technique ric.
Compaction of fills in land reclamation by rapid impact. Factors in vehicle compaction weak soil excessive loads severity of load at the surface impact at depth repeated loadings first pass does 80% of total compaction repeated loadings increase. Bsp international foundations ltd world leaders in. Rapid impact compaction archives geotechnical master. The rapid impact compactor is an innovative dynamic compaction device based on the piling hammer technology used to increase the bearing capacity of soils. P uk in conjunction with the british military as a means of quickly repa. In this technique ground improvement is achieved by impacting the ground with a 7 ton weight, 35 timesmin, and drop height of 0. Ric is rapid, cost effective and can reach challenging locations charels and watts, 2002. Rapid impact compaction ric is a variant of dynamic compaction that uses different equipment. Ricrvc compact, densify, and improve shallow to deep loose soil and fill resulting in strong.
The rapid impact compaction ric is an innovative dynamic compaction method mainly used to compact sandy soils, where silt and clay contents are low. Several ground improvement methods were evaluated and the rapid impact compaction ric method was selected based upon the specific site requirements. Rapid impact compaction with the rapid impact compactor ric is an innovative method in the field of near surface and deep compaction techniques. If performed improperly, settlement of the soil could occur and result in unnecessary maintenance costs or structure failure. Pdf the use of rapid impact compaction for ground improvement. Different parameters used for evaluation of intelligent compaction will be explained. During the compaction of a location, the foot remains into contact with the soil. The ric is a dynamic compaction device based on piling hammer technology. Impact at depth for equal stress at the surface, larger tires affect soil to a greater depth vehicles have gotten larger. Rapid impact compaction and rapid vibro compaction ric and rvc are mobile carrier, dynamic densification and vibratory compaction, ground improvement methods. Pdf rapid impact compaction ric is a modern dynamic compaction technique mostly used to compact sandy soils, where silt and clay. Technical issues, such as test sections and selection of target intelligent. After completing the spt confirmatory testing the resulting spt n60 values were found to have a wide range of results.
Rapid impact compaction the rapid impact compactor was originally developed by b. Rapid impact compaction ric advanced geosolutions, inc. Using a 9t pile hammer to deliver 4060 blows per minute, the 1. Rapid impact compaction rapid impact compaction ricric south africa ric africa ptyltd of. Bsp international foundations ltd world leaders in piling. In this technique, ground improvement is achieved by impacting the. The movement of the foot into the ground, the heavy weight of the equipment and high energy transfer is also causing densification. The impact of the hammer on to the foot initiates the compaction process. Payment for rapid impact compaction ric shall be made at the lump sum price as shown on the tender form.
Designofrapidimpactcompactionatthenewyogyakartainternation. Rapid impact compaction and impact roller compaction. Ric is a technique allied to dynamic compac on that can be used to increase the bearing capacity of soils through controlled. The rapid impact compactor ric is a dynamic compaction device based on the piling hammer technology used to increase the bearing capacity of soils through controlled impacts. The ground improvement plan utilized 819 geopier elements in lieu of timber piles, and approximately 45,000 sf of ric. Rapid impact compaction, ground improvement, static liquefaction, vertical drains, spmt. The rapid impact compactor has been used to successfully compact a wide range of both placed and in situ granular materials, including rockfills, as well as to stabilise naturally occurring loess sand and silt deposits in seismic zones. The advantages and disadvantages of different equipment will be compared. Use of sdmt testing for easuring m soil densification by. The rapid impact compactor ric is a dynamic compaction device based on the piling hammer technology used to increase the.
Pdf evaluation the effectiveness of rapid impact compaction. Assessment of rapid impact compaction for transportation. The general idea of this method is to drop a falling weight from a relatively low height onto a special foot. Compaction dc damage to nearby existing structures and utilities due high impact energy. The ric consist of a compaction foot which is placed on the ground and this is repeatedly struck by a 712 tonne hydraulic hammer, resulting in top down compaction of. Designofrapidimpactcompactionatthenewyogyakartainternational. Heavy rapid impact compaction for transportation of. The rapid impact compaction was originally developed in the early 1990s by b.
Ric and rvc are mobile carrier, dynamic densification and vibratory compaction, ground. Rapid impact compaction ric is a ground improvement technique that densifies shallow, loose granular soils, using a hydraulic hammer which repeatedly strikes an impact plate. The energy is transferred to the underlying loose granular soils and rearranges the particles into a denser configuration. It is also very efficient for compaction of large deposits of spoil rock from the mining industry or from the demolition works. In recent years, rapid impact compaction ric has gained popularity as a ground improvement technique. Rapid impact compaction has been adopted as part of the ground improvement works to mitigate potential seismic. Choosing the type of treatment shallow improvement with stronger and stiffer treated soil over weak or more compressible soil. Ric utilizes a hydraulic hammer, repeatedly striking a 5footdiameter compaction plate at a rate of approximately 40 to 50 blows per minute. In recent years, the rapid impact compaction has gained popularity as a ground improvement technique. Rapid impact compaction ric this technology is very economical and ideal for compaction of uncertified fills, and liquefiable soils with depths up to 25 ft. The use of rapid impact compaction for ground improvement prior to sheet pile installation in sandy fill at the australian marine complex, henderson, wa.
The ric is an innovative dynamic compaction device based on the piling hammer technology and is used. Rapid impact compaction densification technique vibro menard. This ground improvement technique, which is allied to dynamic compaction is called rapid impact compaction. Pdf rapid impact compaction ric as a ground improvement technique find, read and cite all the research you need on researchgate. It also allows making columns out of mining recycled aggregate or construction debris. Bsp international foundations is one of the worlds premier manufacturers of hydraulic piling hammers and ground improvement equipment. Rapid impact compaction middle east the rapid impact compactor is developed by b. If performed improperly, settlement of the soil could occur and. Pdf performance of rapid impact compaction as a middle. Geotechnical considerations for structural engineers. Rapid impact compaction ric is a technique unique to bbge in the uk, used for treating granular fills up to 34 metres in depth. This paper evaluates the efficiency of rapid impact compaction ric, which is an improvement on the process of deep dynamic compaction, in ground improvement.
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