There are a 31-story building above the ground and a 3-story basement of Zhenjiang National Trade Mansion built at the soft soil foundation. The deep foundation pit is 13.20 m deep. The upper wall of the deep foundation pit adopts slope soil anchor structure system. This building is close to two neighboring ones. Its south side is close to an old residence only 4 m apart

while the distance from the constructing comprehensive building is only 2 m. Besides the other two sides are very close to the underground pipe lines. For this reason

during the design of soil anchor

the anchor-tension test is carried out

and during construction for each rod

a pre-stressed force is added for examination

to ensure engineering quality

and to let the supporting structure produce only a small amount of lateral displacement

thus the safe and speedy construction is successfully carried out

and this experience can be used elsewhere for similar engineering work.