The Study On High Piers Long Span Continuous Rigid Construction Monitoring Control And Stability

With the rapid development of the national economy, in some terrain, geology is more complex areas increasing demand for new highway, continuous rigid frame bridge with its simple construction, cost the economy, reasonable force, driving comfort is conducive to conservation, and other unique Advantage has been widely used in recent years. In order to solve practical engineering problems, Is toward continuous rigid frame bridge span, the superstructure continuously lighter, simplified prestressed beam type, side cross to cancel the closure of the floor stand, the upper structure of continuous length increases, the constant increase in thin-walled flexible pier, so further increases the difficulty of the construction Large. High pier span prestressed concrete continuous rigid frame bridge to control the implementation of the construction process is to ensure that permits the bridge structure during construction and bridge the security status of bridge design and construction specifications to meet the requirements of the necessary means. And the stability of high piers during the construction phase of the analysis is very necessary.This article takes BaMaochong great bridge as the research object, the basis of modern control theory, unifies high span continuous rigid frame pier pier's own characteristics, uses the adaptive control theory and utilizes the reasonable construction monitoring method, carries on the analog computation to each construction operating mode, obtains under the perfect condition linear and the stress value, exceptionally and analyzes the reason in the construction process through the measured data prompt discovery, takes the corresponding measure, carries on the real-time revision to the construction process computation model. The stability of high Pier continuous rigid frame bridge pier is main issues which attaches to the structure safety.High Pier continuous rigid frame bridge superstructure's monitoring method had been very already mature, while the deviation of high pier deformation monitoring has not been given attention, this article unifies the BaMaochong great bridge's actual situation, utilizes the high pillar displacement monitoring method, proposed that the construction stage the body establishment prism takes the permanent observation point in high pier, its monitoring result can be very good response high pillar distort really, has certainly to the same type project profits from the significance; The closure stage's construction is the bracket constructs a most essential link, this article through the research construction and the designing department proposed that the different closure plan to the structure the influence, the selection optimization plan, through the project practice confirmation, it meets the construction quality safety requirement.