Studying the change of soil resonance properties due to burried room in the subsurface

Abstract EN

Still the change in soil due making new buildings is not very clear.

The present study is givingthe light on change of soil due to structures and change of structures due to soil or what isnamed soil-structure interaction.

Rivera City is one of the newly generated cities located inSheikh Zayd City (Figure 1).

The natural frequency of vibration of the soil of Rivera city wasdetermined in relatively remote area using Microtremors technique.

It was found to be about10HZ.

The same method was used again for determining the natural frequency of vibrationempty room buried under the ground lever which was found to be about 5HZ.

The dimensionof the buried room is 2.5m height, 4.5m length and 3m width.

A dynamic analysis model forthis buried room was determined using a structural analysis software ETv18.1 and wasfound to be about 5HZ.

To study the soil structure interaction a profile was taken startingfrom the soil and ending over the buried room.

The spectrogram analysis method wasintroduced.

The spectrogram is a continuous recording to the change in frequency with timefor this profile showed that soil is carrying several frequencies in our case 5, 8, 12.5, 17.5 and25 but when the buried room is initiated its resonance frequency is added to the soil.

Moreover, after the room was built the spectrogram over the room is filtering the soilfrequencies and orb only the frequencies related to its dimensions in our case 5HZ, 10HZ, and 17.5HZ and make it continuous and clear.

The study suggests that initiation of newconstructions affect the soil and introduce new frequencies and also the new buildings makefilter to the frequencies carried by the soil and show only frequencies related to its properties.