Test And Research On The Load Bearing Properties Of The Super-long And Large-diameter Bored-pile In Deep Soft Basement

The bridges have been builded spaning rivers and even seaes in deep soft basement more and more with the quickly development of the national economy and bridge-engineering technology, so do the pile basements.In bridge engineering,though a large number of super-long and large-diameter bored-pile have been used, its load bearing properties and load transfer mechanism is not distinct.In practice, the design of super-long and large-diameter bored-piles based on codes which come from the conclusion of testing and researching shor piles are not irrational, its makes the load bearing of the piles have too large safety factor and differ from practice. Therefore, the research on the load bearing properties of the super-long bored-pile is very essential.Based on thd research status at home and abroad, the eingineering properties of thd super-long piles are summarized in the pqper. Simulating the load bearing properties and load transfer mechanism on deep soft soil by FEM.Using single-pile-static-load-test to study the the subsiding quantity of the pile,the load-bearing-capabilities of the pile,the load transferring regular of the pile,and the distribution regular of the side friction under different load action.Research on the load bearing properties of super-long and large-diameter bored-pile by the method of the high strain.Finally, it is concluded that it is feasible to analyzing the load bearing properties and load transfer mechanism by FEM and some useful conclusions are obtained .