Complementary Soil Investigation as a Chance to Optimize the Foundation Design

3rd World Multidisciplinary Civil Engineering, Architecture, Urban Planning Symposium

土木建筑工程;文学

Szmechel, Grzegorz^1 ; Majer, Stanislaw^1 ; Grochowski, Pawel^2

West Pomeranian University of Technology in Szczecin, al. Piastow 50, Szczecin

70-311, Poland^1

Laboratorium Drogowe Szczecin Ltd. Co., Ul Goleniowska 92, Szczecin

70830, Poland^2

关键词: Commercial facilities;    Construction manager;    Construction stages;    Geosynthetics reinforcements;    Geotechnical investigations;    Geotechnical specialists;    Ground water condition;    Serviceability limit state;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/471/4/042031/pdf
DOI  :  10.1088/1757-899X/471/4/042031

学科分类：土木及结构工程学

来源: IOP

【 摘 要 】

Properly performed soil investigation is important for almost all civil engineering tasks. Nowadays when there is a serious lack of plots with good ground water conditions Investors are often forced to make their projects even when ground water conditions are poor or not suitable. The article presents the case study of a small commercial facility in Chojna, Poland, for which poorly conducted preliminary soil investigation could have caused excessive costs for the investor. The layer of organic soils in the ground was the reason for planning huge exchange of soil. Quick reaction of the construction manager, caused that investor decided to hire a geotechnical specialist. A preliminary calculation showed that simple ground improvement should solve the problem. After that, additional static plate tests were performed. Also from organic soil oedometer test, and direct shear tests has been made. In the next step FEM model of subgrade was developed, and serviceability limit state was checked. That provides the possibility to design subgrade improvement by crushed concrete pressed into the organic layers. This type of soil improvement helps to decrease the settlement from 44 mm to more or less 15 mm under the foundation bench. The additional problem to solve was the construction of the roads and parking, especially in the zone of supplies, where heavy trucks were planned to drive. The individual project of geosynthetics reinforcement of pavement and its subbase was performed to prevent uncontrolled settlements. As a next step surveyor measurements of settlement are planned to be performed for the object in different construction stages. Authors of the paper wants to show that even when ground conditions of the plot are not very good, properly planned and developed soil investigation can provide some unexpected savings for the Investor. Paper ends with some conclusions about geotechnical investigation and its influence for the building process.