Pile Capacity Of Geographic Information Systems Applications Research

Firstly the database of bearing capacity of single pile is established in the paper including the database of static test, calculating parameter , calculating result and so forth, which adopts the interrelated-type database of Microsoft Access used universally in the world. And what's more, Geographical Information System of bearing capacity of single piles is set up on this foundation. This system is an applicable geographical information system that regards static test data of single piles and related as main managing objective. As a result, the merit of this system is the case it could quickly offer all kinds of information about static test on piles very exactly and actually at the real-time. It is different from other system whose management is just for database, and it could also offer comprehensive management between graph-base and database too. The system could offer reliable data on management, design and construction of pile foundation through powerful function of geographical analysis and query.Secondly, the paper analyses load-displacement curve on 971 test piles in Zhaoqing by using this system, and the paper further studies on the deformation trend of load-displacement curve and load-bearing character of rock-socketed piles. Then, the paper further studies on the character of bearing capacity of single piles by using Grey System Theory.Finally, according to the result of static loading test data of 971 piles in Zhaoqing, the paper gives some suggestions to calculate ultimate carrying capacity of single pile by empirical formula, such as the limit value of side friction of soil along the pile shaft and the end bearing, especially the end bearing by the rock at the bottom. The result is the closest pile capacity compared with the tradition method, and it is propitious to increase the design level of pile capacity.