Here we will learn about different surveys that are essential to evaluate retrofitting feasibility of damaged or weak building foundation. The analyses that should be carried before foundation repair are:
a. At first to evaluate soil conditions; to have this we can investigate government archives and construction records.
b. Survey for foundation walls and foundation as well
c. To collect damage report
d. Visual survey of foundation and if required ground excavation should be carried out.
e. Crack survey
f. Foundation survey which includes drilling and testing etc.
g. Report of time dependent foundation settlement and settlements as well (precision settlement measurement, precision leveling)
h. Determining foundation load considering static system. This is determined from structural analysis of buildings.
i. Measurement of pore-water pressure
j. Determining ground water table
k. Vibration measurements
l. Quality control of material
m. Straightening and leveling of foundation or other walls
n. Measuring stress in existing tension ribbon
Dear reader we will discuss about general consideration for designing a foundation repair and rehabilitation program in our next post.