ABSTRACT

Interpreting the results from pressuremeter and penetrometer tests can present some complexity for many engineers, but the level of difficulty can vary depending on factors such as the experience, the specific application and the complexity of the site conditions. These tests are geotechnical investigation tools used to assess soil and rock properties such as strength, stiffness and bearing capacity. However, interpreting the results from these tests can involve the following challenges, Engineers need to understand how these tests works in designing of foundation of high-rise buildings, Calculations of settlement and the bearing capacity of soil. Translating the raw test data into meaningful engineering parameters of penetrometer and pressuremeter results with other geotechnical data, such as soil borings, laboratory tests and regional geology, is important for a comprehensive understanding of the site conditions.

Additional guidance from senior engineers, reference to design codes and standards and ongoing training and professional development can be beneficial the Overall, the complexity of interpreting penetrometer and pressuremeter results can vary but with the right knowledge experience and the use of appropriate analysis technique engineers can effectively utilize these test results to make informed decisions. The pressuremeter test measures the soil’s deformation modulus and allows for the determination of settlement and bearing capacity while the penetrometer test evaluates the soil’s resistance to penetration systems for the structure.

From our results soil bearing capacity was obtained by the Pressuremeter test as 2.72Bar at an installation depth of 5m with a settlement of 0.076m  while the soil bearing capacity was obtained with the standard penetration test as 2.1Bar at 5m and a settlement of 0.0248m geotechnical investigations help engineers and architects make informed decisions regarding foundation design, soil stabilization and overall structural integrity. The result from pressuremeter and penetrometer tests are used to establish the design parameter including allowable bearing capacity, settlement calculations, and foundation design is raft foundation with the slab thickness of 0.5 and 0.6 respectively

 Key Words: Geotechnical interpretation, Pressuremeter, Penetrometer test

CHAPER 1: INTRODUCTION 

1.1 Background of Study

The pressuremeter, was introduce in its present form in the 1950s, has gained substantial acceptance in the United States. Typical testing procedures have for the most part not changed since the meter’s Introduction, but changes are being recommended by researchers to accommodate test evaluations in clay soils. The test procedure is in the process of being standardized. Typical uses of the test for foundation design, settlement analysis, and pile behavior are reviewed. The pressuremeter as an in-situ testing instrument is well known and used in the United States and is widely accepted for use in routine investigations.  Since its introduction, considerable research and development have occurred and new testing methods as well as new methods of evaluation have been suggested. It is accordingly considered appropriate to trace this development from its beginning for a better overall understanding of the test of today. The modern use of the pressuremeter is based on the efforts of Louis M~nard, a French engineer, who developed the original concept by K~gler into a usable test instrument in the late 1950s.  M~nard also recognized, however, that new empirical methods will be required to analyze foundation performance with the pressuremeter and made considerable full-scale was introduced in the near future. The pressuremeter test consists of the expansion of a membrane, usually in a predrilled borehole the volume change and the pressure are measured in the test, and the pressures to increase the volume are generally applied in predetermined steps.  A modulus is then determined to reflect the relation between volume change and pressure, and the pressure at which failure of the soil occurs is evaluated.  It is these two parameters, the pressuremeter modulus and limit pressure, that are used in evaluations, together with the curve of pressure versus volumes

1.2 Statement of the Problem and Rationale

To design a foundation using the results of the pressure meter test and penetrometer test on soil properties and determining the bearing capacity of foundations is a complex issue high rise buildings falls amongst the complex design and most couple regarding the accuracy and suitability of the selected method, potentially leading to inadequate foundation designs, compromised structural stability, and increased risks of structural failure.

1.3 Research Question

How can the results of penetrometer and pressuremeter tests be effectively interpreted and utilized in the design of high-rise building foundations, considering factors such as soil behavior, strength, stiffness, and deformation characteristics?  

• How to carry out the pressuremeter test and standard penetration test?
• How to interpret the results gotten from the pressuremter test and the standard penetration test?
• How to compare the results obtained from the pressuremeter test to that of the standard penetration test method?

1.4 Objectives

The objective is to assess the correlation between the results obtained from the Pressuremeter test and penetrometer in different soil conditions and geotechnical contexts. The findings will contribute to enhancing foundation design practices, optimizing structural stability, and improving the safety levels of high-rise buildings.

1. How do you operate a penetrometer
2. How do you operate the pressuremeter
3. How do we design a foundation with these parameters for a high-rise building