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Land Concierge of Japan Visits Vertek CPT Facility

Japanese CPT Services Built by Vertek Land Concierge Inc.’s subsurface technology manager Hideyuki Sato and colleague Yoshihiro Imai visited Vertek CPT's manufacturing facility for a demonstration of our S4 Cone Penetrometer Test (CPT) push system and Data Acquisition Systems (DAS). Land Concierge Inc. has been a customer of Vertek since 2009 and is our sales agent in Japan. Contact Mr. Sato with your Japanese soil testing equipment needs and questions. Vertek personnel demonstrated the versatility of the S4 and provided an interactive tour of our CPT fabrication facilities. Mr. Sato indicated that requests for CPT testing in Japan has increased since 2011 and many of his customers that are interested in incorporating Verteks’ S4 and CPT equipment into their business. Land Concierge's clients focus on: Contaminted sites Site characterization Bio-remediation Geothechnical in-situ testing Soil and groundwater sampling If your organization would like to send a representative to our Vermont facility to learn more about the CPT business and technologies, contact us today.

By smadi66|December 4th, 2019|Geotechnical Nebraska, Vertek Partners, Geotechnical Montana, Geotechnical Nevada, Geotechnical New Hampshire, Geotechnical New Jersey, Geotechnical New Mexico, Geotechnical Michigan, Geotechnical Missouri, Geotechnical Minnesota, Geotechnical Mississippi|0 Comments

In-Situ Soil Testing 101: The Different Types of Tests

In-situ soil testing is essential for gaining soil property information, measuring groundwater pressure, gathering moisture content data and other important data points, all in which can be safety-critical in a number of different instances. In today's post we are going to take a deep dive into a few different types of soil tests that can be performed in-situ. In-situ soil testing can be accomplished in a variety of different ways. Every soil test has its own place and benefit; however, the most accurate and thorough in-situ soil testing for determining a wide variety of technical attributes is Cone Penetration Testing (CPT). Just like everything else, determining what is best for your business is more efficient and effective once you have determined the pros and cons for every possible solution; in this case a testing solution. Options for In-Situ Soil Testing Procedures Here is a closer look at a few different options for performing an in-situ soil test: Standard Penetration Testing (SPT): This option is dynamic, low in cost and has been widely recognized as a simplified solution that provides useful information. While it's reasonably consistent with it's results in fine-grained sands it's not as consistent with coarse sands or clays; which can be difficult for gathering accurate data and analysis of soil conditions. For even more on Standard Penetration Testing, visit one of our previous posts that takes a closer look at SPT for your business. Dynamic Cone Penetrometer (DCP): A DCP manually lifts it's weight and drops into a cone that will then penetrate into the ground. It will record the number of mm per hit as well as gather an estimate of different soil properties, however it doesn't have as many capabilities as the CPT, and can only estimate certain properties. Cone Penetration Testing (CPT): This option collects [...]

By smadi66|December 4th, 2019|Introductory, Geotechnical Montana, Geotechnical Nevada, Geotechnical New Hampshire, Geotechnical New Jersey, Geotechnical New Mexico, Geotechnical New York, Geotechnical Missouri, Geotechnical Mississippi, Geotechnical Nebraska, Geotechnical North Carolina|0 Comments

Analyzing CPT Data

As we've noted in other posts, CPT provides a number of benefits over traditional methods of subsurface soil characterization. These benefits include: Traceability Reports from a specific sounding are easily traced back to the source data, and because CPT is a continuous process, data points in between those reported can be evaluated post-test. This is in contrast to geotechnical boring where individual samples need to be tracked and accounted for from the busy worksite to a remote lab and through to reports and documentation. This can be cumbersome and prone to errors. Immediacy Reports can be generated in near-real-time. This enables customers such as site owners or civil engineers to have visibility to the tests as they are occuring. Having immediacy means that as data is reported and interpreted, any retesting that should be done or any additional soundings that would be useful to clarify or validate data can be called for on the spot. Accuracy Because of the very large volume of soundings that have been done, important factors and relationships have been established that enable the raw CPT data to be translated into useful information. Additionally, as we've noted elsewhere, CPT leaves the soil being tested 'undisturbed' and therefore provides a more accurate assessment than other methods of soil characterization. CPT Data analysis and interpretation can be aided through the use of specialized software Two that our customers have had success with include DataForensics & Datagel. Using software to log, analyze and report your data provides a number of advantages. Traceability, immediacy and accuracy are improved. Additionally, efficiency and therefore your cost structure, benefit as well. With the right software you are able to accelerate your ability to serve customers both more quickly and more accurately. If you are entering or have recently started out in the CPT [...]

By smadi66|December 4th, 2019|Geotechnical Nevada, Geotechnical New Hampshire, Geotechnical New Jersey, Geotechnical New Mexico, Geotechnical New York, Geotechnical Ohio, Geotechnical North Dakota, Geotechnical Nebraska, Geotechnical North Carolina, CPT Data, Introductory, Geotechnical Montana|0 Comments

An Introduction to Soil Compaction Testing

In the construction of high load structures such as dams, paved roadways and construction projects that rely on the stability of embankments; soil compaction is used to increase soil strength. Loose soil can be compacted by using mechanical equipment to remove air-voids, thereby densifying the soil and increasing it's dry unit weight. There are a variety of different benefits to soil compaction, including: prevention of soil settlement and frost damage, increased ground stability, reduced hydraulic conductivity and mitigating undesirable settlement of structures, such as paved roads, foundations and piping. Below you will find a few different examples of how a soil compaction test can be performed. Standard Proctor Compaction Test: Standard Proctor Compaction Testing can be performed in a lab. The testing first determines the maximum density achievable for the soil and uses it as a reference for field testing. It also is effective for testing the effects of moisture on the soil's density. For soil with higher densities a Modified Proctor Compaction Test which uses higher values will be necessary. Materials Needed: 1/30 cubic ft. mold 5.5 lb. hammer 12" drop 3 layers of soil 25 blows Obtain layered soil sample (via our VTK Soil Sampler if equipped) Determine the weight of the Proctor mold with the base and the collar extension Assemble the compaction tool Place soil in the mold in 3 layers Compact the soil with 25 well distributed blows of the hammer Carefully detach the collar extension and base without distributing the soil Determine the weight of the Proctor mold and the soil Oven dry the soil for 12 hours to determine the moisture content Compaction energy can be calculated with this test by using this formula: ((#blows) x (#layers of soil) x (weight of hammer) x (height drop)) / mold volume Field Tests: Field Tests [...]

By smadi66|December 3rd, 2019|Geotechnical New Mexico, Geotechnical New York, Geotechnical North Dakota, Geotechnical Oklahoma, Geotechnical Oregon, Geotechnical Ohio, Geotechnical North Carolina, Introductory, Geotechnical Nevada, Geotechnical New Hampshire, Geotechnical New Jersey|0 Comments

CPT Testing 101: Basic Concepts

A Cone Penetration Test is used to collect key subsurface information from soil by pushing a hardened cone shape per ASTM International standards, deep into the ground with the help of steel rods, a hydraulic ram and, in most cases, a very heavy truck. CPT is typically used to determine the composition, distribution and strength of soil, sediment and other geological subsurface features like clay, sand, bedrock and even contaminants. The information gathered by Cone Penetration Testing can be used to inform important business decisions, like how to design the foundations of a structure. This helps prevent any future issues that could arise from building a structure blind. Of course, CPT testing isn’t the only method of soil investigation, but it is among the most commonly used and accepted, and for good reason. For starters, CPT testing offers quick collection and interpretation of field data; in fact, it is up to three times faster than traditional methods. In addition, CPT testing eliminates drill cuttings, while also being economical, environmentally friendly, safe and adaptive to various weather and soil conditions. In other words, CPT is the clear, superior choice for soil testing in the majority of situations. Best of all, thanks to developments like Vertek’s S4 Push System, it’s possible to perform CPT testing with nothing more than the CPT System and a commercial skidsteer. For a closer look at how CPT stacks up against competing methods of soil investigation, check out our ‘Mud Rotary Drilling vs. CPT’ post. If you're still curious about what expanding into the CPT business can do you your business, subscribe to our blog, or take a closer look at the video below! [/fusion_youtube]

By smadi66|December 3rd, 2019|Introductory, Geotechnical Massachusetts, Geotechnical Montana, Geotechnical Nevada, Geotechnical New Hampshire, Geotechnical Michigan, Geotechnical Missouri, Geotechnical Maryland, Geotechnical Minnesota, Geotechnical Mississippi, Geotechnical Nebraska|0 Comments

CPT Testing, the Piezocone and Measuring Soil Moisture

When you think of Cone Penetration Testing (CPT) you may tend to focus on the soil being tested, which makes sense since soil testing and analysis is largely what CPT is all about. But let’s not forget another equally important aspect of soil testing: moisture. While measuring soil moisture levels isn't necessarily important in every investigation, it is often valuable information to have for your data set. When designing underground electrical equipment or digging tunnels, for example, knowing soil moisture conditions at certain depths is crucial. Measuring Moisture with a ‘Piezocone’ Measuring the moisture content of soil is a crucial aspect of CPT that is performed by a type of cone known as a ‘Piezocone.’ The Piezocone is a core component of many CPT systems; in fact, it’s actually a type of CPT cone. Able to measure the presence of groundwater, the Piezocone is fitted with a device that measures in-situ pore pressure. As such, when the cone penetrates into soils, water pressure is exerted on and measured by the Piezocone. Pore pressure data is recorded automatically during the testing process. As with any standard Cone Penetration Test, the Piezocone also measures pore pressure tip resistance, sleeve friction to provide a picture of the soil behavior being tested. Due to its relatively specialized nature, the Piezocone is typically used when soil conditions are expected to be fairly wet. The Piezocone is a standard configuration of most CPT cones while adding the ability to measure a greater breadth of information. If you found today's post interesting, subscribe to our blog for even more on the CPT business!

By smadi66|December 3rd, 2019|Geotechnical Nevada, Geotechnical New Hampshire, Geotechnical New Jersey, Geotechnical New Mexico, Geotechnical Michigan, Geotechnical Missouri, Geotechnical Minnesota, Geotechnical Mississippi, Geotechnical Nebraska, Introductory, Geotechnical Montana|0 Comments

Heavy CPT Truck Delivered to Saudi Arabian Customer (Video)

Built for Ayed Eid Al Osiami Engineering & Consulting, this heavy duty 6X6 international chassis 20 Ton CPT Truck departs our Vermont facility on August 21, 2014 headed overseas to Saudi Arabia. Contact us today to discuss your geotechincal needs. [/fusion_youtube]

By smadi66|December 3rd, 2019|Geotechnical New Hampshire, Geotechnical New Jersey, Geotechnical New Mexico, Geotechnical New York, Geotechnical Missouri, Geotechnical Mississippi, Geotechnical Nebraska, Geotechnical North Carolina, Video Posts, Geotechnical Montana, Geotechnical Nevada|0 Comments

Grow your Business by Increasing your Geotechnical Services

If you're looking for ways to help grow your business, consider expanding your geotechnical services. By increasing the geotechnical services your company offers, you'll be able to expand your current client base and increase your workload. To realize these benefits, you'll first have to decide which geotechnical services you can offer, which you could offer more in-depth, how it would affect your current workload, and how it can increase your revenue. What Geotechnical Services Can your Business Offer? Rental and sales of equipment Field exploration (soil and rock sampling, test boring, core drilling, electro-magnetic surveying, etc.) Site evaluation (for pavement/ sub grades, alternative site and route studies, definition of critical geotechnical parameters) Engineering analysis and design (slope stability evaluation, hillside grading recommendations, earth retaining structure design, earthquake damage analysis) Laboratory testing services (soil classification, shear strength, permeability, consolidation characteristics, resistivity) Some of these services may be a more natural fit for your current business than others. However, it's worth considering the environment your business is located in, as well as the environmental factors that have an affect on construction. This will help you to hone in on the services that are in demand. Also research any potential competition in your area to see what they do or do not offer, and consider filling any void you discover. For example, if you notice a void in your area's laboratory testing services, consider hiring an expert internally. Between the equipment and manpower you already hold, adding an additional employee may prove profitable. If you're not sure how to gauge demand in your area, consider who you could be marketing your geotechnical services to. Potential customers include: Developers Realtors Architects Engineers Construction companies Utilities Manufacturing companies Financial institutions Federal, state and municipal organizations With a little research and a keen eye, you may [...]

By smadi66|December 3rd, 2019|Geotechnical New Jersey, Geotechnical New Mexico, Geotechnical Ohio, Geotechnical New York, Geotechnical Nebraska, Geotechnical North Dakota, Geotechnical North Carolina, Introductory, Geotechnical Services, Experienced, Geotechnical Montana, Geotechnical Nevada, Geotechnical New Hampshire|0 Comments

How to Read a CPT Soil Behavior Type Chart

As you analyze your CPT data, you are likely to come across several different charts designed to classify soil type based on CPT results.If you are new to the field, these charts can be a bit confusing, so here’s a brief overview of one of the more common chart types. Soil behavior classification via CPT is fast, efficient, and frequently automated via software. Still, understanding the classification method is important, as it will help you to recognize and determine the cause of any errors or irregularities in the data. First of all, it is important to note that, since a traditional CPT test does not involve a soil sample, these charts are not designed to tell you the exact makeup of the soil. Instead, CPT tests indicate the soil’s physical and mechanical properties, or how it behaves. Hence, a CPT soil classification chart is technically referred to as a Soil Behavior Type (SBT) chart. Most CPT soil charts are derived from tip resistance (or normalized tip resistance, Qt) and friction ratio data. The tip resistance is measured in some unit of pressure (Bars, Pa, PSI, etc) and is usually plotted on the vertical axis. This axis is logarithmic, meaning it increases by orders of magnitude rather than linearly as it gets further from the origin. Thus you will see units of 10, 100 and 1000 marked an equal distance apart. The friction ratio is given on the horizontal axis. It is the ratio of the sleeve friction divided by the tip resistance: the two units of pressure cancel, so this unitless ratio is multiplied by 100 and given as a percent. This percentage is generally low: 10% would be considered a high friction ratio, since the CPT cone experiences greater pressure on its tip due to the shear strength of [...]

By smadi66|December 2nd, 2019|CPT Data, Geotechnical Oregon, Introductory, Cone Penetration, Soil Testing, Geotechnical Nevada, Geotechnical New Hampshire, Geotechnical New Jersey, Geotechnical New Mexico, Geotechnical New York, Geotechnical Ohio, Geotechnical North Dakota, Geotechnical North Carolina, Geotechnical Oklahoma|0 Comments

Intro to Seismic CPT

What is Seismic Cone Penetration Testing? Seismic CPT or SCPT is a method of calculating the small strain shear modulus of the soil by measuring shear wave velocity through the soil. The small strain modulus is an important quantity for determining the dynamic response of soil during earthquakes, explosive detonations, vibrations from machinery, and during wave loading for offshore structures. The wave speeds and moduli derived from seismic CPT measurements aid in the determination of soil liquefaction potential and improve the interpretation of surface seismic surveys by providing wave speed profiles as a function of depth. Seismic waves from SCPT tests have been detected at depths of up to 300 feet. How does it work? SCPT testing is performed as part of a normal CPT or CPTU test. Equipment consists of a CPT rig, push system, and: SCPT Cone: The SCPT cone is a CPT or CPTU cone that is equipped with one or more geophone sensors. These sensors measure the magnitude and arrival time of seismic shear and compression waves. Wave Generator: Seismic shear waves are generated at the soil surface in one of two ways: The simplest method is to press a steel bar onto the ground lengthwise using the weight of the CPT rig, then strike the end of the bar with a large hammer. An electronic trigger attached either to the hammer or the bar records the exact time of the strike. Another method uses an electronic wave generator attached to the CPT rig. This method increases repeatability and reduces physical strain and testing time for the field team. The CPT test must be paused briefly at the desired intervals to perform the wave generation and data collection. These pauses may be used to conduct a pore pressure dissipation test as well. Data Acquisition System: As [...]

By smadi66|December 1st, 2019|Introductory, Soil Testing, Geotechnical New Hampshire, Geotechnical New Jersey, Geotechnical New Mexico, Geotechnical New York, Geotechnical North Dakota, Geotechnical Oklahoma, Geotechnical Ohio, Geotechnical Oregon, Geotechnical Pennsylvania, Geotechnical North Carolina|0 Comments