The Client intends to build a block of
4-Storey Shop-houses on a former swampy ground not very far from a large river.
Three boreholes were drilled into the ground. The underlying soil was found to be quite consistent comprising of 11.8m.very soft Clay/Silt, except that the last 1m contains a number of various sized limestone fragments. From 11.8m onwards, the underlying rock was mainly strong, fresh and slightly weathered Limestone.
The rock cores are as shown in the photograph.
Three boreholes were drilled into the ground. The underlying soil was found to be quite consistent comprising of 11.8m.very soft Clay/Silt, except that the last 1m contains a number of various sized limestone fragments. From 11.8m onwards, the underlying rock was mainly strong, fresh and slightly weathered Limestone.
The rock cores are as shown in the photograph.
The Engineer proposed “driving precast Reinforced concrete piles” for
the foundation of the 4-storey reinforced concrete shop-house, which was the
usual method for low rise buildings and estimated the piling length to be 11.8m.
During construction,the Contractor claimed that 42m of precast RC
pile was driven into the ground for each driving point during the first three trial piles.
Was it possible?
The Engineer and the Contractor suspected that the Soil Investigation was not accurate and called another drilling at the piled locations. The results came out to be similar to the initial Soil Investigation.
What Happened to the extra 30m length?
The Engineer and the Contractor suspected that the Soil Investigation was not accurate and called another drilling at the piled locations. The results came out to be similar to the initial Soil Investigation.
What Happened to the extra 30m length?
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