| 摘要 |
Method for the temporary or permanent suspension of an existing building comprising the steps of:
a. building deep foundations (1) outside the perimeter of the existing building (E);
b. modular building, with reinforced adjacent ashlars (4), of a provisional foundation of the building (E) consisting of a grid of main beams (2) and of secondary beams (3) in correspondence of the load-bearing walls (M) of the building (E), wherein
i. said main beams (2) extend beyond the perimeter of the building (E) until resting on said deep foundations (1);
ii. said ashlars (4) are provided within with tubular elements arranged according to a preset design so as to form, all together, one or more continuous channels (T) which longitudinally cross said main beams (2) or secondary beams (3);
iii. said ashlars (4) are laterally shaped with mutually complementary shear keys (4a) apt to transmit the shearing stresses between adjacent ashlars (4);
c. post-tensioning on-site said main beams (2) through the insertion and subsequent tensioning of steel wires within said channels (T);
d. limited lifting of the building (E) by post-tensioning said main beams (2), wherein said channels (T) have a polygonal or curvilinear shape with upward concavity.
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