In Situ Tests in Geotechnical Engineering

Monnet, Jacques

doi:10.1002/9781119145592

Cited by 18 publications

(9 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Firstly, it is continuous evaluation of geological profile, cost effective and time saving process comparing with laboratory tests. From static penetration tests with piezocone (CPTu) can be classified soil type and many properties can be derived too, but we cannot exclude laboratory analyses from geological survey process, [2]. Depending on the future structure and geological environment, following surveying methods are suggested as suitable for the design of square foundations, Tab.1.…”

Section: Methodology Of Geological Surveymentioning

confidence: 99%

See 1 more Smart Citation

The Role of Geotechnical Monitoring at Design of Foundation Structures and their Verification – Part 1

Drusa

Vlček

Orininová

2016

Civil and Environmental Engineering

View full text Add to dashboard Cite

For a long time, design of the square foundations has not posed a problem in engineering practice. Foundations are designed on the basis of determining the bearing capacity of the subsoil, where irregularities in its determination oftentimes affect the efficiency (economy), while possible failures of bearing resistance of foundation soil are rare. More important factor is the resulting deformation of second limit state under consideration - settlement, relative settlement, tilting and excessive deformation. The current pressure on the cost reduction of design preparation and obtaining important data from geotechnical survey often results in many cases into adverse effects of settlement and differential settlement of foundations of the buildings. The question lies in a variety of analytical methods for assessing the service ability of limit states used in European countries as well as the underestimation of the proposal risks. Authors of the article want to document the fact that the most important influence on adequate and safe design is the most accurate determination of geotechnical parameters and the appropriate selection of the calculation method. For the purposes of explanation, Monte Carlo simulation technique was used to test a variety of geotechnical parameters, which will be presented in second part of article. If all construction processes are carried out successfully, rarely are the buildings evaluated once again. However, when the opportunity to participate in the stage of engineering survey and collection of geotechnical parameters as well as the control of the construction process by tools of geotechnical monitoring presents itself, it is valuable to perform the analysis of the entire process for pointing out hidden risks.

show abstract

Section: Methodology Of Geological Surveymentioning

confidence: 99%

“…This error leads to an underestimation of the importance of the elasticity modulus, which sometimes happens especially in cases of soil formed by non-cohesive soils. The result is then usually unequal settlement, large settlement, and deformation of foundation structure, [2].…”

Section: Geotechnical Monitoring;mentioning

confidence: 99%

The Role of Geotechnical Monitoring at Design of Foundation Structures and their Verification – Part 1

Drusa

Vlček

Orininová

2016

Civil and Environmental Engineering

View full text Add to dashboard Cite

show abstract

“…It is noted that the PMT measures are associated with the horizontal stresses compared with the vertical resistance measured by the penetration tests (e.g., SPT, CPT, and DPT). Many empirical correlations have been proposed to convert PMT measures to various soil parameters [5,14] and other penetration test measures [16][17][18][19][20][21][22][23]. e PMT measures are commonly used [5] to calculate the bearing capacity and deformation modulus of foundation soils following equations (3) and ( 4).…”

Section: Pressuremetermentioning

confidence: 99%

Estimating Deformation Modulus and Bearing Capacity of Deep Soils from Dynamic Penetration Test

Shan

Pei

Zhan

2021

Advances in Civil Engineering

View full text Add to dashboard Cite

The dynamic penetration test (DPT) and the Menard pressuremeter test (PMT) have been widely used in geotechnical survey of deep soils for megadam foundations in western China. The DPT measures are not well utilized due to the lack of correction factors and of empirical relationships for deep soils. This study investigates the relationships between the corrected DPT blow counts ( N 120 ′ ), pressuremeter modulus (EPMT), limit pressure (pL), deformation modulus (E0), and bearing capacity (fak) derived from the PMT results. Meanwhile, a nonlinear regression model is developed to predict the DPT correction factor (a) based on the raw DPT blow counts (N120) and the rod length (L) by integrating the available correction factors for shallow gravelly soils suggested by the code provisions and the deep soil data in this work. It is concluded that the proposed DPT correction factors match well with the code suggestions and the new compiled dataset, and the corrected DPT blow counts can be used to reasonably predict the engineering properties of deep sand and clay soils. Although the proposed correlations need to be tested among different soil types and regions, the results shed the light on in situ geotechnical tests and data utilization for deep and thick overburden.

show abstract

“…In Uganda, since 2013, load tests have been used to either prove the maximum capacity of the foundation and/or to verify the predicted design values and settlements under pressure on a foundation that is expendable to the main works; and at times on a working pile whilst limiting the maximum test load to less than 1.5 times the safe working load [5][6][7].…”

Section: The Research Backgroundmentioning

confidence: 99%

A Comparative Analysis of Foundations using Prescriptive Design and Static Loading Test Methods

Samuel¹,

Kyakula²,

Bangi³

2019

IJERT

View full text Add to dashboard Cite

Despite recent improvements in soil characterisation, geotechnical exploration and construction methodologies, 66.7% of overhead transmission line foundation design engineers use prescriptive design methods with applied traditional factors of safety between 2.5 to over 4.0, to design foundations in the face of uncertainties in ground conditions and design criteria, non-linear nature of the load-displacement response of foundations and the prescriptive design's tendency to give linear solutions. Hence, the use of full-scale foundations and static load tests to assess the overall response of foundations. A Ø900mm pile and 3 pad foundations along Uganda's 400 kV Karuma Interconnection Project were designed, constructed and tested under uplift, compression and lateral loads as per the respective failure modes. The results suggested that the maximum displacements were within 0.36-18.96% of the prescriptive 25 mm value for uplift, 3.32% of the prescriptive 25 mm value for compression, and 4.78% of the prescriptive 50 mm value for the lateral load test in conformity to IEC 61773 (1996) and COMESA/FDHS 293 (2007). The foundations' insitu load capacities from the hyperbolic graphs as per the Chin-Kondner extrapolation (1971), confirmed that the foundations could adequately resist the working loads at 100% and ultimate design loads at 130%, despite uncertainties of moderately aggressive chemical environment exposures as per BS EN 206 (2013) or soils with medium to high degrees of plasticity with low swell potentials.

show abstract

In Situ Tests in Geotechnical Engineering

Cited by 18 publications

References 0 publications

The Role of Geotechnical Monitoring at Design of Foundation Structures and their Verification – Part 1

The Role of Geotechnical Monitoring at Design of Foundation Structures and their Verification – Part 1

Estimating Deformation Modulus and Bearing Capacity of Deep Soils from Dynamic Penetration Test

A Comparative Analysis of Foundations using Prescriptive Design and Static Loading Test Methods

Contact Info

Product

Resources

About