The Construction Technologe Research Of Deep Base Hole On Runyang Changjiang Road Bridge

Deep base-hole engineering is put number one among the new technologies practiced and used later by Constructive Department in 1998.Features including amount of hard word, high-level technology, and more unpredictable factors note it.The safety and reliability on it not only affects the construction, but also have an impact on the surroundings.Therefore, in order to defend the reliability, reasonability, and economy of the construction, we must thoroughly know about it,really put the theory togther with the practice of construction, purposely deal well with the series among design, construction, and inspection.The Nancha suspending-gay bridge of the Changjiang road-bridge in Jiangshu Runyang, with a main span of 1490m,ranks first in China, third in the world..The north rivets, only 250m from the main stream of Changjiang, have a tight liaison with the waterpower of it.Especially, in this area, the face of rocks undulates a lot and exist fault-fabric.The soil there has apparent difference with the trend of water.The base-hole of North Rivets can be named a super-deep one, with a 60m length,50m widths, and 48m depths.The fence of the base takes advantages of the rectangular underground continuous wall structure and succeeds.On this basis, this article makes a narrative and research on the apply that underground continuous wall puts on the super-deep base-hole.The key-point is the research of constructive features in designs of structure and in super-deep base-hole.More emphasis on the research in the structural design of underground continuous wall,the split of tanks,the junction, the technology in building tanks, ,the water-tighten design of the base, the design on downing the water-lever, the estimable analysis and tactics in tightening water., downing water-level and the design on the propping system of the deep base-hole, the digging technology of deep base-hole,the informational constructive program, the methods of checking the base-hole, the informational construction.At last,by this means, we can sum up an intact, advanced,reasonable technological methods on designing, constructing,and checking, also significantly accumulate successful data and experiences for the design and construction of super-deep base-hole at home and abroad.