The Application Of Deep Beam To Great Tonnage Pile Vertical Static Load Test

Reinforced concrete deep beam has high rigidity and great bearing capacity. It has been applied to grand span bridge and port construction, such as bearing platform. The loading reaction system, including anchor pile, bearing platform and reaction beam, is rigid-framed structure with large size in great tonnage pile vertical static load test. In order to satisfy the requirement of great tonnage loading and its application to engineering, the thesis does thorough research on that reaction system as follows:(1) Such kind of deep beam is complex rigid-framed structure. The author advances a conception of consolidated deep beam and analyzes its characteristics of bearing force and deformation.(2) It is the first time to analyze that reaction system in great tonnage pile bottom vertical dead load test. The author establishes a finite element space calculating model for the reaction system of deep beam, and carries out space calculating and analysis by the software ANSYS.(3) In order to make theoretical calculating model consistent with actual structure, the author reasonably deals with the problem of triaxial prestress in the finite element three-dimensional model of deep beam.(4) The thesis applies prestresses to the reaction system of pile static load test for the first time. Specially, the application of prestresses to anchor piles is a great technological innovation in the bridge pile static load test history.(5) After the painstaking design of reaction system, the group adopts construction pile as anchor pile, regards bearing platform and reaction beam as parts of pier. The design not only satisfies tests, but also meets the requirement of construction practice. Therefore, the cost is reduced. This method can be referred to by such kind of deep beam.(6) In in-situ great tonnage pile vertical static load test, the author compares the theoretical value and monitored test value of parameters, such as the stress, strain, and deflection of deep beam. The results prove it is reasonable that the design of such kind of deep beam.This thesis is of theoretical reference value for the development of design theory of deep beam. In addition, it is also significant in construction practice.