Temeltek offers specialized geotechnical investigations with in-house capacity of experienced geotechnical engineers along with other engineering personnel. Building up a team of engineers have extensive experience in geotechnical investigations and other exploratory works, we have completed several service contracts regarding deep foundations, deep excavations, , soil surveys, design and assesment of the construction materials through our engineering consultancy services.
Temeltek provides;
- Deep foundations and site development investigations
- Slope stability investigation, analysis and remediation
- Excavation stability and dewatering requirements
- Retaining walls, erosion assessment, mitigation and design
- Landfill siting, design and construction QA monitoring
- Landfill assessments and closures
- Design, costing, tendering and Project Management
- Construction testing (QA/QC) and monitoring
- Engineering review and assessments for municipalities
- Erosion assessment and remedial design
Temeltek’s engineering team is highly experienced in delivering routine and complex geotechnical designs founded on the basis of cost-effective, practical and timely solutions. Temeltek has a long and proven track record of working with local and international clients tfrom different industrial segments. Our goal is to ensure that a high-quality product can be constructed with reasonable costs. Below are the tests that we are capable of performing regarding deep foundation and exacavation applications ;
Temeltek is specialized in providing high strain dynamic load testing, analysis and consulting services for deep foundations solutions. Temeltek has highly qualified engineers for dynamic pile testing. The dynamic pile testing is performed using a Pile Driving Analyzer on site and pile wave analysis will be carried out on the signal acquired by using Case Pile Wave Analysis Program.
It has been more than 30 years since the dynamic pile load testing technology has been introduced to the construction industry. It is a time saving pile testing method and it is very popular in the construction technology. It is a very cost-efficient tool used to replace the time consuming conventional static load test in determination of pile capacity.
Dynamic pile testing is a very efficient tool in monitoring the response of a pile subjected to hammer impact applied at the pile head. The response is measured in terms of force and acceleration close to the pile head. Other than determination of pile capacity, the behaviour during the pile installation works, such as the pile integrity, driving stresses and the energy transmitted to the pile. Once the pile wave analysis is completed, the full report will present the predicted static load-settlement behaviour and the pile capacity distribution among the pile shaft and pile toe. All these information are very useful in assessment of the pile capabilities by the engineers.
Temeltek is one of the leading firms providing geotechnical services in Turkey. Our professionals are highly experienced in PIT testing that we have a team of qualified engineers and supporting staff to perform on site tests to assure the quality of product. This sort of service best fits with the driven piles, cast-in-place piles along with the structural columns. The PIT Testing that we provide is a cost effective way to test the continuity of concrete of pile. Apart from this, clients can avail this testing service from us in different specifications.
Pile integrity test (PIT) confirms the absence of major cracks and voids on any type of concrete foundations prior to construction of the superstructure. It may also test piles integral in the structure, such as those supporting existing bridges or towers, and determine their length.
PIT performs the wave non-destructive test known as Pulse or Sonic Echo Test, or Low Strain Dynamic Test. The test consists of attaching one or two accelerometers to the foundation, and using a small hand-held hammer to impact it. The accelerometer data reveals any significant changes in cross section that may exist along the shaft. The PIT software post processes the data and generates report.
Determination of the ultimate bearing capacity of the ground and the likely settlement under a given load can be performed with Plate Bearing Test which is an insitu site investigation field test. Site investigations for most projects consider ground conditions at depth; on the other hand, the strength and variability of the near surface ground is critical for the design and operation of working platforms. The Plate Bearing Test is typically used in the design of temporary working structures such as working platforms for piling rigs or pads for crane outriggers. Approximate equivalent CBR values can be derived from the Modulus of sub grade reaction by use of mathematical relationship.
The Plate Bearing Test is normally carried out at foundation level, either on the surface or in a shallow pit. Plates of varying sizes up to 720mm diameter are available. The loading plate is placed on the ground and connected via a load cell to a reaction load. Due to the larger size of the plate used (compared with a CBR test) the test is more suitable for testing larger aggregate backfills, however, it requires a larger reaction load. Typically, a minimum 15tonne tracked excavator or other suitable plant is required for us to use as a reaction load.
The materials to be utilized in the grounds of the sub foundations where backfill process is required in accordance with the profile of the land where the project is going to be implemented are due to a serial of laboratuary tests and the suitable materials and the design is determined with the results of these tests.
Considering the size of these materials, the processed form of the natural materials which are manufactured in the quarry plants in order to provide a product which is suitable to the required design. Otherwise, it is not possible to acquire the required design model through the whole natural materials.
The selected materials are gone through a serial of tests in order to determine the production methods, number and thickness of the layers, number of the tours of the compactor in accordance with the project specifications by comparing the humidity percentage and the maximum rough dry density of the materials.
It is possible to fin the optimum moisture level and max. Dry rough density of the materials through proctor tests in the laboratuary. In addition to this, the determination of the thickness and the bearing capacity is found through California Bearing Ratio test (CBR). The materials manufactured at the quarries shall be inspected periodically. The applications at the site or an road construction shall be performed in accordance with the test results.
After all of these preparations, the production at the site, namely the compaction is going to be tested. There are several methods in accordance with ASTM in order to test the compaction;
These are :
1 – Sand Cone Method; ASTM D – 1556
2 – Nuclear (density and moisture ) method ; ASTM D – 2922
3 – Baloon Method ; ASTM D – 2167
4 –Drive- cylinder ; ASTM D – 2937
The pressuremeter test is an in-situ testing method used to achieve a quick measure of the in-situ stress-strain relationship of the soil. In principle, the pressuremeter test is performed by applying pressure to the sidewalls of a borehole and observing the corresponding deformation.n
The pressuremeter consists of two parts, the read-out unit which rests on the ground surface, and the probe that is inserted into the borehole (ground). The original Ménard-type pressuremeter was designed to be lowered into a performed hole and to apply uniform pressure to the borehole walls by means of inflatable flexible membrane. As the pressure increases, the borehole walls deform. The pressure is held constant for a given period and the increase in volume required for maintaining the constant pressure is recorded. A load-deformation diagram and soil characteristics can be deduced by measurement of the applied pressure and change in the volume of the expanding membrane.
The major difference between categories of pressuremeter lies in the method f installation of the instrument into the ground. Three main types of pressuremeters are:
- The borehole pressuremeter: The instrument is inserted into a performed hole.
- The self-boring pressuremeter: The instrument is self-bored into the ground with the purpose of minimizing the sol disturbance caused by insertion.
- Displacement pressuremeters: The instrument is pushed into the ground from base of a borehole. The soil displaced by the probe during insertion enters the body of instrument, reducing the disturbance to the surrounding soil (see Cone-pressuremeter).
Inclinometers are used to monitor subsurface deformations of the ground in landslides, embankments, and dams and around deep excavations and tunnels.Inclinometer casing is installed in a vertical borehole that passes through suspected zones of movement into stable ground.Plots of inclinometer data show the magnitude, direction, and rate of ground movement.
Piles can be tested for compression, tension or lateral loads. By providing actual capacity and deflection values, the test results can be used to confirm that the pile design load can be adequately supported. Depending on the test pile’s performance, the results may also allow for project cost savings by permitting an increase in the pile design load, a reduction in the overall pile length, or a quantification of capacity in difficult or unknown soil conditions. Additionally, the results will offer an improved knowledge of pile-soil behavior, as well as provide valuable data that can be used for future research.
The cone penetration or cone penetrometer test (CPT) is a method used to determine the geotechnical engineering properties of soils and delineating soil stratigraphy. It was initially developed in the 1950s at the Dutch Laboratory for Soil Mechanics in Delft to investigate soft soils.
The method is used typically to monitor settlement and heave in deep foundations, excavations and embankments. Settlement is identified at the depth/position where the settlement has occurred and as well as measuring the total amount of settlement.
The California bearing ratio (CBR) is a penetration test for evaluation of the mechanical strength of natural ground, subgrades and basecourses beneath new carriageway construction. The results obtained by these tests are used with the empirical curves to determine the thickness of ground and its component layers. This is the most widely used method for the design of flexible pavement.