Bsp international foundations ltd claydon business park, gipping road, great blakenham. Dgs developed the ric9000 specifically for multipurpose foundation work. As an alternative to traditional deep foundations, utilizing controlled modulus column cmc rigid inclusions and low mobility grouting lmg can be an effective approach for project sites with loose andor compressible soils overlying karstic voidprone geology. Slovak university of technology, faculty of civil engineering.
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. Pdf rapid impact compaction ric as a ground improvement technique find, read and cite all the research you. The vibro compaction, vibroflotation, and dynamic compaction methods are discussed in a. Jun 20, 2018 rapid impact compaction ric is a ground improvement system that, lately, has been widely used as a soil modifier to strength and deformability characteristics. Rapid impact compaction ground improvement technique can be applied for final treatment of the upper. Liquefaction mitigation of desert sand using rapid impact. The rapid impact compaction for the soil improvement uses a hydraulic hammer mounted on an excavator. Rapid impact compaction is a shallow ground densification using energy waves from a hydraulic hammer weighing 7. In construction, this is a significant part of the building process.
Rapid impact compaction ric is a ground improvement system that, lately, has been widely used as a soil modifier to strength and deformability characteristics. Pdf effective improvement depth for ground treated with. Keller vendor registration form keller north america. Vibration emission induced by rapid impact compaction. Rapid impact compactor soil civil engineering scribd. 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. To evaluate the usefulness of this technique in the arabian gulf region, the ric is used to improve an area of 29,000 m2 on a project site. Astm d5080 17 standard test method for rapid determination. Using a 9t pile hammer to deliver 4060 blows per minute, the 1.
Evaluation of dynamic compaction method and rapid impact. The site located on 6th street will be undergoing a process called rapid impact compaction to prepare the site for foundation work on the new building. Among such methods are, for instance, the conventional falling weight compaction method, also known as dynamic compaction dc, and the relatively recently developed rapid impact compaction ric method. Dynamic compaction, dynamic replacement, rapid impact. Rapid impact compaction the rapid impact compactor was originally developed by b. Geotechnical solutions for soil improvement, rapid embankment construction, and stabilization of the pavement working platform addresses issues designed to help mitigate obstacles that have the potential to prevent the widespread use of geoconstruction technologies. The hammer is generally equipped with a 7 to 9 tonne steel weight dropped form a f 1. And rapid impact compactor is widely applied in many areas.
Assessment of rapid impact compaction for transportation. Ground improvement without admixtures in noncohesive soils or fill materials a5. Soil compaction is a physical form of soil degradation that alters soil structure, limits water and air infiltration, and reduces root penetration in the soil. Rapid impact compaction ric is a ground improvement system that, lately, has been widely used as a soil. Show full abstract compaction, vibro compaction, and stone columns are considered the most popular ground.
Rapid impact compaction uses controlled impact technology to increase the bearing capacity of soils up to a depth of 6m. The hammer with a weight ranging from 5 up to 12 tons is dropped freely from a height of 1. It is used to densify loose soils and improve their bearing capacities. Despite being identified as a geoconstruction technology applicable to transportation infrastructure applications, rapid impact compaction ric has yet to be utilized on a transportation infrastructure project.
Liquefaction potential mitigation using rapid impact. This particular method can be utilised as part of a foundation system as an alternative to traditional piled solutions in most soil conditions. Vibration impact kneading pressure soil compaction soil compaction is defined as the method of mechanically increasing the density of soil. 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. Og i am confident that the compaction achieved is of the highest standard. Rapid impact compaction ric is a quick and reliable form of soil compaction improvement. Recently pve introduced a new range of rapid impact compaction ric rigs. Rapid impact compaction ground improvement advantages. The driving cap connected to the base allows articulation. Performance of rapid impact compaction as a middledeep ground improvement. Ric rapid impact compaction since the bsp rapid impact compactor ric attachment was first developed for military use almost 25 years ago the concept has become a commercial success and the preferred method for an increasing number of shallow ground improvement projects around the world. Rapid impact compaction for ground improvement menard.
At the time, skip had the foresight to see that the pile driving industry was becoming more advanced and technical. In recent years, the rapid impact compaction ric has gained popularity as a ground improvement technique. The company has invested in what is believed to be the uks only ninetonne rapid impact compactor which provides deep compaction of soils beyond the effective reach of traditional roller methods. Download limit exceeded you have exceeded your daily download allowance. For ground improvement in general three different methods can be recognized.
The improvement of the loosely deposited sands and silts with. Rapid impact compaction rapid impact compaction ricric south africa ric africa ptyltd of. The ric consists mainly of three impact components. This paper presents results of numerical and experimental studies concerning the effect and efficiency of the rapid impact compactor ric. Neighbourhood notice of rapid impact compaction please be advised that the peachland seniors support society is about to being construction on a new seniors housing building in peachland. Sincere thanks fd, i shall look to source that reference. Rapid impact compactor, dynamic compaction, increase the. Ricrvc compact, densify, and improve shallow to deep loose soil and fill resulting in strong, composite ground for the support of foundations and for liquefaction mitigation. Ric rvc rapid impact compaction and rapid vibro compaction. Depending on weather conditions, production rates ranged from 4500 to 7500 sf per day. Www rapid impact compaction contractors records bomag compaction equipment, action equipment systems inc. Recurring blows at each treatment position create imprints, which. There are four types of compaction effort on soil or asphalt.
This paper will present case studies of the mitigation of liquefaction potential at two sites using rapid impact compaction ric. A possibility of insitu ground improvement with the rapid impact compaction ric technique was investigated at two test sites where the construction of the high embankments is planned. Rapid impact compactor left, impact foot with driving cap center top, points of compaction center bottom, and compaction process right. Electric pulse compaction densification of granular soil using the shock waves and energy generated by electric pulse under ultrahigh voltage. Ground improvement has been used on many construction sites to densify granular material, in other word, to improve soil properties and reduce potential settlement. Minimizes settlement to a greater extent and provides uniform support for a floor slab or foundation footing, while controlling vibrations to 2 inches per second within 30 feet of the drop point rapid impact compaction consolidates the soil immediately instead of using a surcharge to. Cmc rigid inclusions and lowmobility grouting for structure.
Ric hammering stops at high deflection, high blows, or manual stop by operator. This paper evaluates the efficiency of rapid impact compaction ric, which is an improvement on the process of deep dynamic compaction, in ground improvement. Oct 28, 2016 metropoint, new jersey cmc rigid inclusions, dynamic compaction and rapid impact compaction duration. The geotechnical engineer recommended rapid impact compaction ric as the most economical method of improving the soils underlying the building footprint and test railroad track.
Www rapid impact compaction contractors construction dir. In general the ric technique increases soil stiffness and creates uniform soil bearing capacities. The rdc machine consists of a hydraulic excavator baase with a strenthened arm to which a compaction hammer is attached. Trbs second strategic highway research program shrp 2 report s2r02rw1. Application of the rapid impact compaction ric citeseerx.
Surface compaction including rapid impact compaction. We are proud to be the largest rapid impact compaction contractor in north america with over 500 projects completed. The rapid impact compactor is a welcome supplement the current suite of ground improvement tools available to the ground engineering community. The ric is a dynamic compaction device based on piling hammer technology. Impact compaction an overview sciencedirect topics. Ricrvc compact, densify, and improve shallow to deep loose soil and fill resulting in strong. In 1984, norwalk marine contractors nmcwas established as a local marine contractor by louis skip gardella. Read geotechnical solutions for soil improvement, rapid. Nov 22, 2017 the company has invested in what is believed to be the uks only ninetonne rapid impact compactor which provides deep compaction of soils beyond the effective reach of traditional roller methods. In case soils are difficult to compact such as clay, peat and soft silt layers soil replacement could be the solution. In recent years, the rapid impact compaction has gained popularity as a ground improvement technique. Rapid impact compaction ric is a technique that was developed in the united kingdom in the 1990s for rapid densification of soils to repair bomb craters on runways. The rapid impact compaction ric technique was originally developed for the rapid repair of explosion damage to military airfield runways and comprises a modified hydraulic piling hammer acting. As such, by using conventional vibratory rollers, highenergy impact compaction, rapid impact compaction, dynamic compaction, and vibroflotation, soil can be compacted up to an effective depth of 1.
Rapid impact compaction is a soil improvement method based on hydraulic piling hammer technology. Ric is a method of soil improvement using a trackmounted machine that imparts energy by dropping an approximately 6,800 kilogram 7. To evaluate the usefulness of this technique in the arabian gulf region, the ric is used to improve an area of 29,000 m2 on a project site near. Rapid impact compaction is a highfrequency controlled energy soil compaction technique used to densify surface layers of soils to a depth of 5 to 7 metres in most cases with minimum impact on the immediate worksite environment. The data stored in the monitor can be downloaded to a. Application of the rapid impact compaction ric technique for risk mitigation in problematic soils. Rapid dynamic compaction rcd technique is a recently developed soil improvment tecnique, use for compaction of granular soils up to 5 m deep, as alternative to dynamic compaction method. Rapid impact compaction another form of dynamic compaction. Specifications rapid impact compaction rigs pve 7 ric pve 9 ric pve 12 ric pve 16 ric pve impact hammers max. Geostructures used a combination of rapid impact compaction ric and geopier technology for support. Rapid impact compaction with the rapid impact compactor ric is an innovative method in the field of near surface and deep compaction techniques.
Rapid impact compaction ground improvement technique can be applied for final treatment of the upper strata. Impacts repeated at a rate ranging from 40 up to 60 blows per minute plunge the steel foot creating a crater. It works by imparting dynamic energy through a falling dropweight, which is dropped from a controlled height onto a patented foot. Rapid impact compaction has been adopted as part of the ground improvement works to mitigate potential seismic. Ric is rapid, cost effective and can reach challenging locations charels and. Pdf performance of rapid impact compaction as a middledeep. Metropoint, new jersey cmc rigid inclusions, dynamic compaction and rapid impact compaction duration. Hydraulic rapid impact compaction can eliminate hidden quality problems thus improving the backfill quality of highway construction, bridge and culvert. Online index of rapid impact compaction contractors companies that are active in the commercial construction industry. The study was carried out by direct field measurements using cone.
Several ground improvement methods were evaluated and the rapid impact compaction ric method was selected based upon the specific site requirements. Pdf the use of rapid impact compaction for ground improvement. Ground vibrations induced by dynamic compaction and rapid. The rapid impact compactor ric is a dynamic compaction device. Ric treatment is effective in the top layers up to 6m depth, but improvements up to 9m have been achieved. Rapid impact compaction ric ground improvement was used to densify the various fill materials and provide a uniform subgrade for the target foundations and floor slab.
Cofra dynamic compaction cdc method, also referred to as rapid impact compaction ric, is a technique that densifies loose granular materials up to a depth of 7 to 9 meters below the surface by repeatedly dropping an hydraulically accelerated weight from a height of 1. P uk in conjunction with the british military as a means of quickly repairing damage runways. 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. The vibrocompaction, vibroflotation, and dynamic compaction methods are discussed in a. Energy is imparted by dropping the weight through a relatively small height of up to 1. Rapid impact compaction densification technique vibro.
Pdf ground improvement using rapid impact compaction. Both technical and nontechnical obstacles, such as a lack of performance data, have impeded the introduction of ric into the transportation sector. Theoretical investigations comprise numerical computer simulations of. Designofrapidimpactcompactionatthenewyogyakartainternation. The improvement of the loosely deposited sands and silts. Hydraulic rapid impact compaction, rapid impact compactor. For cohesive soils such as sand, gravel and some silty sands, compaction methods are a good solution for ground improvement. Ric is rapid, cost effective and can reach challenging locations charels and watts, 2002. Dynamic compaction dc or heavy tamping is mainly used for deep compaction and literally involves dropping a weight or pounder that is suspended from a crane onto the ground.
Pdf rapid impact compaction ric is a modern dynamic compaction technique mostly used to compact sandy. In this technique, ground improvement is achieved by impacting the ground with a 7 tone weight, 35 timesmin, and drop height of 0. Jan 31, 2012 compaction of agricultural soils is a concern for many agricultural soil scientists and farmers since soil compaction, due to heavy field traffic, has resulted in yield reduction of most agronomic crops throughout the world. Pdf performance of rapid impact compaction as a middle. A wide range of attachments means that the range of use of the liebherr hs 895 hd crawler crane is almost unlimited. Rapid impact compaction ric is a technique that was developed in the united kingdom in the. This paper studies the efficiency of this method to mitigate liquefaction susceptibility of shallow to middledeep desert sand deposits during the strong event.
It is not only highly effective, but can substantially reduce project cost and duration when used instead of conventional construction methods. The bearing capacity of the soil is increased after it is treated. Rapid impact compaction and rapid vibro compaction ric and rvc are mobile carrier, dynamic densification and vibratory compaction, ground improvement methods. Dynamic compaction techniques dynamic compaction is a. Each lift is being hit with about 12 passes of an impact roller in conjunction with heavy vibratory padfoot rolling. Rapid impact compaction for ground improvement menard group usa. In this technique, ground improvement is achieved by impacting the. This paper was downloaded from the online library of the international. This paper evaluates the efficiency of rapid impact compaction ric, which is an.
If performed improperly, settlement of the soil could occur. The pve rapid impact compaction rigs are specially designed for ground improvement. Effective improvement depth for ground treated with rapid. Pve supplies rigs for ric with a maximum compaction depth of approximately 10 meters.