Delele 4 5 6 Name: SID: PART Two-ENGINEERING QUESTIONS five-level shopping and c

Question

Delele 4 5 6 Name: SID: PART Two-ENGINEERING QUESTIONS five-level shopping and cinema complex with three levels of below-ground parking is planned for a site in Toytown. The site is located near the intersection of two major roads in a suburban subdivision (minor roads are not shown). A preliminary site investigation consisting of a number of auger-holes, fully cored drill-holes and a seismic results of this work have been combined with information gathered from geological maps and refraction survey has been completed. The reports of investigations from nearby sites to generate the accompanying cross-section. Note that the upper 5 m of the gabbro is highly weathered. Inspect the map and the accompanying cross-section, and the brief descriptions of the geological materials found in the area surrounding the planned construction site. Note that the water table is currently located 2.0 m beneath the ground surface at the site. Complete the questions below. You should use sketches if you think they would improve your answer el Questions E 13 1) List and describe at least two geological problems or geotechnical issues presented by this site:

Explanation / Answer

Since, the structure planned is a five level shopping and cinema complex over a 5 M. thick gabbo. Basically, Gabrro is a Black coloured Igneous rock which is highly weathered as the data given in the question. From, Geotechnical perspective, one could arise of the variability of the ground spatially, i.e. 1. the properties of rock/soil which were got from the bore holes, are they remain same throughout the entire shopping and cinema complex premises ?

2. which tests is to be conducted ? Field or lab tests are sufficient

3. What would be the nature of foundation to be planned ?

5. Answer of all these questions lies with how accurately or preciously you conduct the Geotechnical Investigation and all the field test.

6. From my experience, we must initially do the seismic refraction or cross hole test to look after the surprizes in the ground supporting the structure and we must plan the boreholes and do the Standard penetration or cone penetration test etc. We can also go for the Plate load test to assertain the foundation design as a optimizing tool.

7. As the ground water level is very high and we had plans of placing vehicular parking, and during the excavation, quick sand or boiling of highly weathered rock could happen.

8. Thus, we must have supporting systems like secant piling all around the excavation to the support the adjacent existing building structures.

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